Carrier Aquazone 50PSW Installation Guide PDF

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Carrier Aquazone 50PSW Installation Guide PDF

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Page 1

Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

Source Water Loop Control for UC Open XP

Installation and Start-up Guide

CARRIER CORPORATION 2021 Catalog No. 11-808-541-01 6/16/2021

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Verify that you have the most current version of this document from www.hvacpartners.com or

www.accounts.ivusystems.com or your local Carrier office.

Important changes are listed in Document revision history at the end of this document.

Corporation. All other trademarks are the property of their respective owners.

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Contents Source Water Loop Control for UC Open XP overview and specifications .............................................................. 1

What is the Loop Control application? .............................................................................................................. 1 UC Open XP specifications .................................................................................................................................. 1 Safety considerations........................................................................................................................................... 3

Installing the UC Open XP ........................................................................................................................................... 4 Mounting the UC Open XP ................................................................................................................................... 4 Wiring the UC Open XP for power....................................................................................................................... 4

To wire for power ................................................................................................................................... 5 Addressing the UC Open XP ................................................................................................................................ 5 Wiring for communications ................................................................................................................................. 6

Wiring specifications for BACnet MS/TP and ARC156 ........................................................................ 6 To wire the controller to the network ................................................................................................... 6

Wiring inputs and outputs ................................................................................................................................... 7 Inputs and outputs table ...................................................................................................................... 7 Input wiring specifications .................................................................................................................... 8 Inputs ..................................................................................................................................................... 9 Binary outputs ....................................................................................................................................... 9 Analog outputs .................................................................................................................................... 10 To wire inputs and outputs on the UC Open XP ................................................................................. 11

Installing the UC Open XP IO expander .................................................................................................................... 14 To mount and attach the UC Open XP IO ....................................................................................................... 14 To wire for power ............................................................................................................................................... 15 Wiring inputs and outputs ................................................................................................................................ 15

Input wiring specifications .................................................................................................................. 16 Inputs on the UC Open XP IO .............................................................................................................. 16 Binary outputs ..................................................................................................................................... 16 To wire inputs and outputs on UC Open XP IO ................................................................................... 17

Wiring an Equipment Touch to the UC Open XP's Rnet port ....................................................................... 18 Wiring Specifications ........................................................................................................................... 18 To wire an Equipment Touch to the UC Open XP ............................................................................... 19

Start-up ....................................................................................................................................................................... 21 Select the Loop Control control program and graphic ................................................................................. 21 Configure the points and properties ............................................................................................................... 21

Sequence of Operation ............................................................................................................................................. 23 Scheduling without Condenser Water Linkage ............................................................................................. 23 Scheduling with Condenser Water Linkage................................................................................................... 24 Constant flow pump control ............................................................................................................................. 24 Loop pump(s) constant flow ............................................................................................................................ 25 Loop Pump(s) with bypass valve differential pressure control ................................................................... 25 Loop Pump(s) with VFD loop differential pressure control ......................................................................... 26 Two loop pumps with VFDs, lead/lag operation for loop differential pressure control .......................... 27 Pump rotation .................................................................................................................................................... 27 Tower fan control ............................................................................................................................................... 28 Analog (2-stage modulating) tower fan control ............................................................................................ 28 Staged tower fan control .................................................................................................................................. 29 Boiler control ...................................................................................................................................................... 29 Analog (2-stage modulating) boiler/valve control ........................................................................................ 30 Staged boiler control ......................................................................................................................................... 30 Condenser Water Linkage ................................................................................................................................ 31 Loop optimization .............................................................................................................................................. 31 WSHP compressor enable command output ................................................................................................ 32

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Contents

Alarm lamp output ............................................................................................................................................ 32

Troubleshooting ......................................................................................................................................................... 33 UC Open XP LED's .............................................................................................................................................. 33 Expander LED's .................................................................................................................................................. 34 To get the serial number .................................................................................................................................. 35 To restore defaults ............................................................................................................................................. 35 To replace the UC Open XP's battery .............................................................................................................. 36

Compliance ................................................................................................................................................................ 37 FCC Compliance ................................................................................................................................................. 37 CE Compliance ................................................................................................................................................... 37 BACnet Compliance........................................................................................................................................... 37

Appendix A: UC Open XP and UC Open XP IO wire lists ......................................................................................... 38 UC Open XP wire list .......................................................................................................................................... 38 UC Open XP IO wire list ..................................................................................................................................... 40

Appendix B: Loop Control Points/Properties .......................................................................................................... 42 Status................................................................................................................................................................... 42 Unit Configuration .............................................................................................................................................. 43 Setpoints ............................................................................................................................................................. 45 Alarm Configuration .......................................................................................................................................... 46 Service Configuration ........................................................................................................................................ 47 Maintenance ....................................................................................................................................................... 54 Alarms ................................................................................................................................................................. 55 Linkage ................................................................................................................................................................ 56 I/O Points ............................................................................................................................................................ 57

Appendix C: Loop Control Points/Properties on the Equipment Touch .............................................................. 60 Navigation screens ............................................................................................................................................ 60 Startup Wizard ................................................................................................................................................... 62

Document revision history ........................................................................................................................................ 65

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What is the Loop Control application?

The Loop Control application is designed to maintain the source supply water temperature at the control setpoint

and provide source water flow as required. The Loop Control application supports up to 4 stages of boiler capacity

and up to 4 cooling tower stages. The controller also provides the option to use 2 cascaded Analog Outputs for

either, or both, the tower staging or boiler capacity staging. The Loop Control can control 1 or 2 pumps in a

constant-flow application, or up to 2 pumps in a variable-flow source water application, maintaining the loop

pressure differential setpoint. The internal application programming provides loop pump operation based on heat

pump demand and/or scheduling. This controller can be used in stand-alone mode, communicate to an i-Vu

Control System, or a BACnet Third Party Building Automation System (BAS).

It can also be used in conjunction with Carrier WSHP Open controller as a complete system that utilizes Linkage to

operate the loop pumps. The Linked system protects against individual heat pump lockouts by sending the loop

status and loop temperature to each heat pump to insure proper operation. The Loop Control, when used with

Carrier WSHP and Linkage, can optimize the water loop temperature for greater system energy savings over a

simple fixed two-setpoint control system.

You can connect a Carrier Equipment Touch user interface with the UC Open XP, using the 5-pin Local Access port.

The Equipment Touch is a touchscreen device with a 4.3 in. color LCD display that you can view or change

property values, schedule equipment, view trends and alarms, and more, without having to access the system's

server.

For more details about the Equipment Touch, see the Equipment Touch Installation and Setup Guide.

The Loop Control application supports detailed color graphics, status, properties, alarms, trends, performance,

configuration, and Help on the Equipment Touch. In addition, the Startup Wizard facilitates configuring installation

configuration. For details, see Loop Control Points/Properties on the Equipment Touch (page 60).

UC Open XP specifications

Power 24 Vac 10%, 5060 Hz

20 VA power consumption

26 Vdc (25 V min, 30 V max)

Single Class 2 source only, 100 VA or less

BACnet MS/TP Port For communication with the controller network using MS/TP (9600 bps, 19.2

kbps, 38.4 kbps, or 76.8 kbps)

BACnet ARC156 Port For communication with the controller network using ARC156

Source Water Loop Control for UC Open XP overview and specifications

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Rnet port Supports one Equipment Touch per Rnet.

NOTES

Equipment Touch requires 24 Vac and cannot be powered by Rnet's 12 Vdc.

For more details, see the Equipment Touch Installation and Setup Guide.

The Loop Control application does not support the ZS or Wireless sensor. Only

the Equipment Touch can be connected to the Rnet port.

Local Access port For system start-up and troubleshooting using Field Assistant

Xnet Remote Expansion port For communication with the UC Open XP IO expander.

Inputs 12 inputs configurable for 0-10 V, RTD Therm Dry, or 0-20mA. Inputs 1 and 2 may

be used for pulse counting.

Input pulse frequency 10 pulses per second. Minimum pulse width (on or off time) required for each

pulse is 50 msec.

Input resolution 12 bit A/D

Aux Power Output 5 Vdc or 24 Vdc input sensor power. Jumper selectable, limited to 200 mA.

Available on input terminal 1.

Binary outputs 6 binary outputs, configured as dry contact, normally open or normally closed,

must be powered from a Class 2 power source.

Analog outputs 6 analog outputs:

1 and 2 are configurable for 0-10 V or 0-20 mA

3 - 6 are 0-10 V only

Output resolution 8 bit D/A

Real time clock Battery-backed real time clock keeps track of time in the event of a power failure

Battery 10-year Lithium CR2032 battery retains the following data for a maximum of

10,000 hours during power outages: control programs, editable properties,

schedules, and trends.

Protection Built-in surge and transient protection for power and communications in

compliance with EN61000-6-1.

Incoming power and network connections are protected by non-replaceable

internal solid-state polyswitches that reset themselves when the condition that

causes a fault returns to normal.

The power, network, input, and output connections are also protected against

transient excess voltage/surge events lasting no more than 10 msec.

CAUTION To protect against large electrical surges on serial EIA-485

networks, place a PROT485 at each place wire enters or exits the building.

Status indicators LEDs indicate status of communications, running, errors, and power. LED

indicators for transmit/receive for the BACnet MS/TP and ARC156 ports and for

each of the 12 outputs.

Environmental operating

range

0 to 140 F (-18 to 60C), 0 to 90% relative humidity, non-condensing

Storage temperature range -24 to 140F (-30 to 60C), 0 to 90% relative humidity, non-condensing

Physical Rugged aluminum housing with removable screw terminals

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Overall dimensions A:

11-13/16 in. (30 cm)

5 in. (12.7 cm)

Mounting dimensions C:

4 in. (10.2 cm)

1/2 in. (1.3 cm)

13/64 in. (.5 cm)

Panel depth 2 in. (5.1 cm)

Weight 1.1lb. (0.5 kg)

BACnet support Conforms to the BACnet Advanced Application Controller (B-AAC) Standard Device

Profile as defined in ANSI/ASHRAE Standard 135-2012 (BACnet) Annex L,

Protocol Revision 9

Listed by UL-916, (Canadian Std C22.2 No. 205-M1983), CE, FCC Part 15-Subpart B-Class

Safety considerations

WARNING Disconnect electrical power to the UC Open XP before wiring it. Failure to follow this warning

could cause electrical shock, personal injury, or damage to the controller.

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To install the UC Open XP:

1 Mount the controller (page 4).

2 Wire the controller for power (page 4).

3 Set the controller's address (page 5).

4 Wire the controller to the BACnet MS/TP or BACnet ARC156 network (page 6).

5 Wire inputs and outputs (page 7).

6 Wire expanders to the controller (page 14).

7 Wire devices to the Rnet port (page 18).

Mounting the UC Open XP

WARNING

When you handle the UC Open XP:

Do not contaminate the printed circuit board with fingerprints, moisture, or any foreign material.

Do not touch components or leads.

Handle the board by its edges.

Isolate from high voltage or electrostatic discharge.

Ensure that you are properly grounded.

Screw the UC Open XP into an enclosed panel using the mounting slots on the cover plate. Leave about 2 in. (5

cm) on each side of the controller for wiring. See mounting dimensions in Specifications.

If using expanders, see Installing an expander (page 14) before mounting the controller.

Wiring the UC Open XP for power

WARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals.

CAUTIONS

The UC Open XP is powered by a Class 2 power source. Take appropriate isolation measures when mounting

it in a control panel where non-Class 2 circuits are present.

Carrier controllers can share a power supply as long as you:

Maintain the same polarity.

Use the power supply only for Carrier controllers.

Installing the UC Open XP

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Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

To wire for power

1 Turn off the UC Open XP's power switch to prevent it from powering up before you can verify the correct

voltage.

2 Remove primary power from the 24 Vac transformer.

3 Pull the screw terminal connector from the controller's power terminals labeled Gnd and 24 Vac.

4 Connect the transformer wires to the screw terminal connector.

5 Apply primary power to the transformer.

6 Measure the voltage at the UC Open XP's power screw terminal connector to verify that the voltage is within

the operating range of 21.6 - 26.4 Vac.

7 Insert the screw terminal connector into the UC Open XP's power terminals.

8 Turn on the UC Open XP's power switch.

9 Verify that the Power LED is on and the Run LED is blinking.

Addressing the UC Open XP

The UC Open XP's two rotary switches determine its MAC address when it is placed on a BACnet MS/TP network.

The rotary switches define the MAC address portion of the device's BACnet address, which is composed of the

network address and the MAC address.

1 Turn on the controller's power.

2 Using the rotary switches, set the controller's address. Set the Tens (10's) switch to the tens digit of the

address, and set the Ones (1's) switch to the ones digit.

EXAMPLE If the controllers address is 25, point the arrow on the Tens (10's) switch to 2 and the arrow on

the Ones (1's) switch to 5.

10's

1's

7 8

3 Turn on the controller's power.

NOTE The controller reads the address each time you apply power to it.

CAUTION The factory default setting is 00 and must be changed to successfully install your UC Open XP.

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Wiring for communications

The UC Open XP communicates using BACnet on the following types of network segments:

MS/TP communicating at 9600 bps, 19.2 kbps, 38.4 kbps, or 76.8 kbps

ARC156 communicating at 156 kbps

NOTE For more networking details, see the Open Controller Network Wiring Installation Guide.

Wiring specifications for BACnet MS/TP and ARC156

Cable: 22 AWG or 24 AWG, low-capacitance, twisted, stranded, shielded copper wire

Maximum length: 2000 feet (610 meters)

WARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals.

To wire the controller to the network

1 Pull the screw terminal connector from the controller's power terminals labeled Gnd and 24 Vac.

2 Check the communications wiring for shorts and grounds.

3 Connect the communications wiring to the BACnet MS/TP or to the BACnet ARC156 port.

NOTE Use the same polarity throughout the network segment.

4 For MS/TP, verify the jumpers are set to 485-2w and EIA-485. They are not used for ARC156.

5 Set the communication type and baud rate.

For...

Set Communications

Selection jumper to...

Set DIP switches 1 and 2

to...

Set DIP switches 3 and 4

to...

MS/TP MS/TP The appropriate baud rate.

See the MS/TP Baud

diagram on the controller.

Off/Off

ARC156 ARC156 N/A. Baud rate will be 156

kbps regardless of the DIP

switch settings.

On/On

NOTE Use the same baud rate for all controllers on the network segment.

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6 Wire the controllers on an MS/TP or ARC156 network segment in a daisy-chain configuration.

7 If the UC Open XP is at either end of a network segment, connect a BT485 to the UC Open XP.

8 Insert the power screw terminal connector into the UC Open XP's power terminals.

9 Verify communication with the network by viewing a Module Status report in the i-Vu interface.

Wiring inputs and outputs

WARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals.

See Appendix A (page 38) to print a blank wire list.

Inputs and outputs table

Depending on the configuration of the Loop Control application, the I/O points change. For variable flow

applications,such as the bypass valve control or VFD pump control, the function of Channel AO2 changes.

I/O Type Channel Input Type Object Name

Source Supply Water Temp BAI IN-1 10K Thermistor sswt_sensor

Source Return Water Temp BAI IN-2 10K Thermistor srwt_sensor

OAT sensor BAI IN-3 10K Thermistor oatsens

RH sensor BAI IN-4 0-10 Vdc rh_sensor

Source Water Diff. Pressure BAI IN-5 0-10 Vdc src_diff_press

SW Pump 1 Amp sensor BAI IN-6 0-10 Vdc swp1_amp_sensor

SW Pump 1 Status BBI IN-6 Dry Contact sw_p1_status

SW Pump 2 Amp sensor BAI IN-7 0-10 Vdc swp2_amp_sensor

SW Pump 2 Status BBI IN-7 Dry Contact sw_p2_status

Remote

Contact Input

BBI IN-8 Dry Contact rem_con

Source Water Flow BBI IN-9 Dry Contact sw_flow

High Wtr Level BBI IN-10 Dry Contact high_sump_lvl

Low Wtr Level BBI IN-11 Dry Contact low_sump_lvl

Pump 1 VFD Output BAO AO-1 0-10 Vdc pump1_vfd_output

Bypass Valve/Pump 2 VFD Output BAO AO-2 0-10 Vdc chw_bypass_valve_vfd

Boiler Output 1 BAO AO-3 0-10 Vdc boiler_output1

Boiler Output 2 BAO AO-4 0-10 Vdc boiler_output2

Tower Output 1 BAO AO-5 0-10 Vdc tower_output1

Tower Output 2 BAO AO-6 0-10 Vdc tower_output2

CW Pump1 S/S BBO BO-1 cw_pump1

CW Pump2 S/S BBO BO-2 cw_pump2

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I/O Type Channel Input Type Object Name

WSHP Comp Command BBO BO-3 wshp_ok

Alarm BBO BO-4 alm

Makeup Valve BBO BO-5 makeup

Boiler Output Stage 1 BBO EXP BO-1 m1128

Boiler Output Stage 2 BBO EXP BO-2 m1141

Boiler Output Stage 3 BBO EXP BO-3 m1142

Boiler Output Stage 4 BBO EXP BO-4 m1143

Tower Output Stage 1 BBO EXP BO-5 m1144

Tower Output Stage 2 BBO EXP BO-6 m1145

Tower Output Stage 3 BBO EXP BO-7 m1146

Tower Output Stage 4 BBO EXP BO-8 m1147

Legend

AI - Analog Input

BI - Binary Input

AO - Analog Output

BO - Binary Output

*Channel use is determined by specific application configuration.

Input wiring specifications

Input Maximum length Minimum gauge Shielding

05 Vdc 500 feet

(152 meters)

22 AWG 100 feet

(30.4 meters) unshielded

100 - 500 feet shielded

Thermistor

Dry contact

Pulse counter TLO

500 feet

(152 meters)

22 AWG 100 feet

(30.4 meters) unshielded

100 - 500 feet shielded

Equipment Touch

device

500 feet

(152 meters)

22 AWG (7x0096) bare

copper

If shielded, Aluminum/Mylar shield

(100% coverage) with TC drain wire

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Inputs

The UC Open XP has inputs that accept the following signal types.

Signal Type Description

Thermistor Precon type 2 (10 kOhm at 77F). Input voltages should be from 0.489 Vdc

to 3.825 Vdc for thermistors.

Dry contact A 5 Vdc wetting voltage detects contact position, resulting in a 1 mA

maximum sense current when the contacts are closed.

05 Vdc

010 Vdc

The input impedance of the UC Open XP is approximately 20 kOhm.

020 mA

The input resistance on the positive (+) terminal is 250 Ohms. The Aux

Power Out connector is capable of supplying 24 Vdc to multiple 420 mA

transducers, but the total current demanded must not exceed 200 mA. If the

voltage measured from the Aux Power Out connector to Gnd is less than 18

Vdc, you need to use an external power supply.

RTD Platinum - 1 kOhm at 32F (0C)

Nickel/Iron - 1 kOhm at 70F (21C)

Balco TS8000 - 1 kOhm at 70F (21C)

Input voltages should be from 0.61.2 V

Pulse counter* UI-1 and UI-2 only:

Maximum of pulses per second. Minimum pulse width required for each

pulse:

ON to OFF time (half cycle) is msec

ON to OFF to ON time (full cycle) is msec

* The UC Open XP can perform pulse counting for dry contact or voltage inputs if you assign the input to a Pulse

to Analog Input microblock.

Binary outputs

The UC Open XP has 6 binary outputs. Each output is a dry contact that must be powered from a Class 2 power

source.

To size output wiring, consider the following:

Total loop distance from the power supply to the controller, and then to the controlled device

NOTE Include the total distance of actual wire. For 2-conductor wires, this is twice the cable length.

Acceptable voltage drop in the wire from the controller to the controlled device

Resistance (Ohms) of the chosen wire gauge

Maximum current (Amps) the controlled device requires to operate

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Analog outputs

The UC Open XP has analog outputs:

1 and 2 are configurable for 0-10 Vdc or 0-20 mA

3, 4, 5, and 6 are 0-10 V only

The controlled device must and have the following input impedance:

If output controls a... Resistance to ground must be...

010 Vdc device 500 Ohms minimum

020 mA device 800 Ohms maximum

NOTES

The device must share the same ground as the UC Open XP

The total output current from all outputs and the Aux Power Out connector must not exceed 200 mA at 86F

(30C).

200 mA at 115F

122.5 mA at 140F

For temperatures above 86F (30C), use the following equation to calculate the total current at 3.1 mA per

degree:

200 mA - ((max. expected temp. - 86F) * 3.1 mA/F)

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To wire inputs and outputs on the UC Open XP

1 Turn off the UC Open XP's power.

2 Connect the input wiring to the screw terminals on the UC Open XP.

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NOTES

If using shielded wire, connect the shield to the GND terminal with the ground wire. Tape off the shield

wire at the sensor end.

Connect the shield wire to the GND terminal with the ground wire.

Use only UI-1 or UI-2 for pulse counter or timed local override.

For an internally-powered 4-20 mA sensor, wire the sensor's positive terminal to the + terminal on the UC

Open XP's Aux Power Out port. Wire the sensor's negative terminal to an input's + terminal.

3 Set the appropriate jumpers on the UC Open XP.

To use... For...

Any input Thermistor

Dry contract

05 Vdc

0-10 Vdc

020 mA

RTD

Set each input's

Universal Input

Mode Select

jumper to the

type of signal the

input will receive.

Aux Power

Out port

Internally-powered

4-20 mA

Set the Select jumper to +5V or +24V as

required by the sensor.

4 Connect the binary output wiring to the screw terminals on the UC Open XP and to the controlled device.

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5 Connect the analog output wiring to the screw terminals on the UC Open XP and to the controlled device.

6 Set the AO Mode Select jumper to the type of device you are wiring the output to.

7 Turn on the UC Open XP's power.

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1 Mount the expander. (page 14)

2 Wire the expander for power. (page 15)

3 Wire inputs and outputs. (page 17)

CAUTION Do not change the rotary switch address from the default setting of 1.

To mount and attach the UC Open XP IO

WARNING

When you handle the UC Open XP IO:

Do not contaminate the printed circuit board with fingerprints, moisture, or any foreign material.

Do not touch components or leads.

Handle the board by its edges.

Isolate from high voltage or electrostatic discharge.

Ensure that you are properly grounded.

Wiring restrictions for connecting the UC Open XP IO to the UC Open XP

Maximum length: 100 feet (30 meters)

22 or 24 AWG, low-capacitance, twisted, stranded, shielded copper wire

You can mount the UC Open XP IO in one of the following locations:

On top of a UC Open XP, using the two allen cap screws provided. Connect Gnd to Gnd, Xnet- to Xnet-, Xnet+

to Xnet+.

Installing the UC Open XP IO expander

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Beside the UC Open XP, by screwing the UC Open XP IO into an enclosed panel using the mounting slots on

the cover plate. Leave about 2 in. (5 cm) on each side of the expander for wiring. Mounting hole dimensions

1.5" from the left (width) by 10.2" (height). Connect Gnd to Gnd, Xnet- to Xnet-, Xnet+ to Xnet+. You can

mount the UC Open XP IO up to 100 ft away from the UC Open XP.

To wire for power

Older models of the UC Open XP IO have a power jumper that you must set to turn the expander on and off.

CAUTIONS

The UC Open XP IO expander is powered by a Class 2 power source. Take appropriate isolation measures

when mounting it in a control panel where non-Class 2 circuits are present.

For the UC Open XP to recognize an attached expander, you must turn on the expander before you turn on the

UC Open XP.

1 Pull the screw terminal connector from the controller's power terminals labeled Gnd and 24 Vac.

2 Ground shielded wire to the UC Open XP IO's ground terminal.

3 Set the configuration jumpers for inputs 9 through 16 for thermistor/dry contact or 0-5 Vdc.

4 Insert the power screw terminal connector into the UC Open XP's power terminals.

5 Verify that the Power LED is on and the Run LED is blinking.

Wiring inputs and outputs

WARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals.

See Appendix A (page 38) to print a blank wire list.

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Input wiring specifications

Input Maximum length Minimum gauge Shielding

05 Vdc 500 feet

(152 meters)

22 AWG 100 feet Unshielded

100 - 500 feet Shielded

Thermistor

Dry contact

Pulse counter

TLO

500 feet

(152 meters)

22 AWG 100 feet Unshielded

100 - 500 feet Shielded

Inputs on the UC Open XP IO

The UC Open XP IO has 16 inputs that accept the following signal types:

Signal Type Description

Thermistor Precon type 2 (10 kOhm at 77F). Input voltages should be from 0.489 Vdc to 3.825 Vdc

for thermistors.

Dry contact A 5 Vdc wetting voltage detects contact position, resulting in a 1 mA maximum sense

current when the contacts are closed.

05 Vdc

The input impedance of the UC Open XP IO is approximately 20 kOhm.

Pulse counter 10 pulses per second. Minimum pulse width (on or off time) required for each pulse is 50

msec.

Binary outputs

The UC Open XP IO has 8 binary outputs. Each output is a dry contact that must be powered from a Class 2 power

source.

To size output wiring, consider the following:

Total loop distance from the power supply to the controller, and then to the controlled device

NOTE Include the total distance of actual wire. For 2-conductor wires, this is twice the cable length.

Acceptable voltage drop in the wire from the controller to the controlled device

Resistance (Ohms) of the chosen wire gauge

Maximum current (Amps) the controlled device requires to operate

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To wire inputs and outputs on UC Open XP IO

1 Verify that the UC Open XP IO's power and communications connections work properly.

2 Pull the screw terminal connector from the controller's power terminals labeled Gnd and 24 Vac.

3 Connect the input wiring to the screw terminals on the UC Open XP IO.

NOTE Connect the shield wire to the GND terminal with the ground wire.

4 Set each input's Universal Input Mode Select jumper to indicate the type of input.

WARNING Do not apply 24 Vac to these universal inputs.

5 Connect binary output wiring to the BO screw terminals on the UC Open XP IO and to the controlled device.

6 Wire GND for each binary output to its even-numbered terminal.

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7 Insert the power screw terminal connector into the UC Open XP's power terminals.

Wiring an Equipment Touch to the UC Open XP's Rnet port

Only the Equipment Touch can be connected to the Rnet port. The Loop Control application does not support the

SPT sensor, ZS sensor, or Wireless Adapter for wireless sensor.

The Rnet communicates at a rate of 115 kbps.

CAUTION The Equipment Touch requires a 24 Vac power supply. It is not powered by the Rnet.

Wiring Specifications

NOTE If you wire the Equipment Touch directly to the controller's Rnet port, you can use a 2-conductor cable

instead of the standard 4-conductor Rnet cable.

Description 4-conductor, shielded or unshielded, CMP, plenum rated cable

Conductor 22 AWG (7x0096) bare copper

Maximum length 500 feet (152 meters)

Insulation Low-smoke PVC (or equivalent)

Color Code Black, white, green, red

Shielding If shielded, Aluminum/Mylar shield (100% coverage) with TC drain wire

UL temperature rating 32167F (075C)

Voltage 300 Vac, power limited

Listing UL: NEC CL2P, or better

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To wire an Equipment Touch to the UC Open XP

Power wiring

2-conductor wire 18 AWG for distances up to 100 feet. All transformer secondaries must be grounded. Wiring

connections must be in accordance with NEC and local codes.

The Equipment Touch cannot be powered by the Rnet. It requires a 24 Vac (15%), 5 VA, 5060 Hz, Class 2

external power supply.

Rnet wiring

NOTE If you wire the Equipment Touch directly to the controller's Rnet port, you can use a 2-conductor cable

instead of the standard 4-conductor Rnet cable.

Description 4-conductor, shielded or unshielded, CMP, plenum rated cable

Conductor 22 AWG (7x0096) bare copper

Maximum length 500 feet (152 meters)

Insulation Low-smoke PVC (or equivalent)

Color Code Black, white, green, red

Shielding If shielded, Aluminum/Mylar shield (100% coverage) with TC drain wire

UL temperature rating 32167F (075C)

Voltage 300 Vac, power limited

Listing UL: NEC CL2P, or better

CAUTION The UC Open XP can share a power supply with the Carrier controller as long as:

The power supply is AC power.

You maintain the same polarity.

You use the power source only for Carrier controllers.

1 Turn off the UC Open XP's power.

2 Partially cut, then bend and pull off the outer jacket of the cable. Do not nick the inner insulation.

3 Strip about 0.25 inch (0.6 cm) of the inner insulation from each wire.

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4 Wire the UC Open XP's Rnet+ and Rnet- terminals to the terminals of the same name on the Equipment

Touch's connector.

NOTE If using shielded wire, connect the shield wire and the ground wire to the Gnd terminal.

5 Turn on the UC Open XP's power.

6 Turn on the Equipment Touch.

For complete Equipment Touch installation instructions including wiring diagrams, see the Equipment Touch

Installation and Setup Guide.

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Use one of the following interfaces to start up, access information, read sensor values, and test the controller.

This interface... Provides a...

Field Assistant application -

Runs on a laptop that connects to controller's Local Access port 1

Temporary interface

Equipment Touch device -

Connects to controller's Rnet port 2

Temporary or permanent

interface

i-Vu application

Available for BACnet systems only

Permanent interface

System Touch device

Available only for BACnet MS/TP systems.

Wire to a BACnet MS/TP network connector and a 24 Vac power supply 3

Temporary or permanent

interface

1 Requires a USB Link (Part #USB-L). 2 See the Equipment Touch Installation and Setup Guide for detailed instructions. 3 See the System Touch Installation and Setup Guide for detailed instructions.

CAUTION If multiple controllers share power but polarity was not maintained when they were wired, the

difference between the controller's ground and the computer's AC power ground could damage the USB Link and

the controller. If you are not sure of the wiring polarity, use a USB isolator between the computer and the USB

Link. Purchase a USB isolator online from a third-party manufacturer.

Select the Loop Control control program and graphic

The field-installed UC Open XP does not come from the factory with a control program or graphic. You must load a

control program and graphic as part of the installation and commissioning. You can select the Loop Control control

program and graphic from EquipmentBuilder. All the configurations that are currently available for the Loop

Control are included in a single download file for both the equipment and graphic.

After selecting the control program and graphic files, save and download them to the controller. If desired, you can

create a custom graphic using ViewBuilder. See ViewBuilder Help for details.

Configure the points and properties

You must configure certain points and properties.

Appendix B (page 42) is a complete list of all the points and properties, with descriptions, defaults, and ranges.

These properties affect the unit operation and/or control. Review and understand the meaning and purpose of

each property before changing it.

Start-up

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Appendix C (page 60) show the points and properties you can configure using the Equipment Touch.

To start up the controller, configure your necessary points/properties in the following:

Unit Configuration (page 43)

Setpoints (page 45)

Service Configuration (page 47)

Examples of some settings that you need to configure for start-up are the Number of Pumps, Pump Control, and

Pump Staging, found in the Service Configuration (page 47) section of Appendix B (page 42).

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The Loop Control Source Loop Control is an application that is designed to control the pumps, towers, and boiler

operation in a heat pump system. The pumps provide water loop circulation, while the towers and boilers supply or

remove energy from the source water loop for the heat pumps. The Loop Control can control one or two pumps in

a constant-flow application, or up to 2 pumps in a variable-flow source water application, maintaining the loop

pressure differential setpoint

The Loop Control supports Carrier Condenser Water Linkage between Carrier Open WSHP units and the loop

controller. When Linkage is active, the loop controller responds to the demands for heating or cooling from the

Open WSHPs and will operate the pump(s) when required. The system provides closed loop feedback to the

individual WSHPs by confirming source water availability prior to operating any compressors in the Carrier Open

WSHPs. Also, the Loop Control receives the acceptable range of the source water temperature from the Carrier

Open WSHPs and verifies that the water provided is within the required operating temperature range.

The Loop Control may be used as a standalone loop control without Carrier Linkage and utilize a third party

BACnet system for control, or operate in a standalone mode providing a hardwired binary input to command the

loop pump operation and a hardwired binary output (WSHP Comp Command) to confirm successful loop

operation.

The following sections describe the Loop Control's functionality. All points in this sequence of operation refer to

the Equipment Touch, Field Assistant, or i-Vu interface.

Scheduling without Condenser Water Linkage

Scheduling

The Loop Control MUST be occupied for loop pump operation. The occupied time periods define when the pump(s)

operate. The Loop Control operates the pumps continuously during the occupied period.

You must provide a source for occupancy by:

configuring a Time Schedule

mapping System Occupancy to a BACnet point

utilizing the Remote Contact Input

using a third party control system that Enables/Disables the BAS On/Off point

setting the local time and date for the schedule to function and operate properly

You can change the occupancy source to one of the following:

Occupancy Schedules

The controller is occupied 24/7 until you configure a time schedule using the Equipment Touch, Field

Assistant, the i-Vu application, or until a third party control system Enables/Disables the BAS On/Off point.

You can disable the local occupancy default operation by going to Configuration > Unit Configuration >

Occupancy Schedules and changing the point from Enable to Disable and clicking OK.

NOTE You must Enable this point in order for the Equipment Touch, Field Assistant, or the i-Vu application

to assign a time schedule to the controller.

Sequence of Operation

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Schedule

The unit operates according to the schedule configured and stored in the unit. The schedule is accessible in

the Equipment Touch, Field Assistant, or the i-Vu application. The daily schedule consists of a start and stop

time (standard or 24-hour mode) and 7 days of the week, starting with Monday and ending on Sunday.

Enable the Occupancy Schedules to use the occupancy scheduling.

Occupancy Input Contact (optional)

If configured for remote occupancy control (default), the controller can use an external dry contact closure to

determine the occupancy status of the Loop Control. Disable the Occupancy Schedules to use the occupancy

contact input.

NOTE Scheduling can only be controlled from one source.

BAS (Building Automation System) On/Off

For use with a Building Automation System that supports network scheduling, you must disable the

Occupancy Schedules so the BAS can control the unit through a network communication and the BAS

scheduling function.

NOTE Scheduling can either be controlled from the unit or the BAS, but not both.

System Occupancy

Uses the network to obtain an occupancy status value from another controller, which is read over the network

and used by this controller. Occupancy Schedules MUST be set to Disable to use this function. See Device

Address Binding to configure the System Occupancy point.

NOTE Scheduling can only be controlled from one source.

Scheduling with Condenser Water Linkage

When the Loop Control is part of a Carrier Open WSHP system and Condenser Water Linkage is active, you can

configure how the loop pumps operate. The system can be configured to start the pumps only on a heating or

cooling demand from any of the Carrier WSHPs linked to the Loop Control by setting the Pump Start to Demand.

You can configure it to operate the loop pumps on any demand and/or continuously during the occupied period,

as defined by the Open WSHPs' schedules that are connected through Linkage. No local occupancy scheduling is

available when Linkage is active.

Constant flow pump control

You can configure the Loop Control to operate 1 or 2 constant speed loop pumps.

When power is reapplied after a power outage, there is a user-configurable delay of 5 - 600 seconds (default 5)

before starting any pump. You must configure Power Fail Restart Delay to define the delay time (0 - 600 seconds,

default 5) before the pump begins to operate after power has been restored to the controller.

If the Shutdown input is active, the pump is shut down after the Pump Stop Delay expires, regardless of

occupancy state. Otherwise, the pump will operate whenever the occupancy state is determined to be occupied.

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Pump Status (Option) - An optional hardware input is available for each pump. You can configure it as either an

analog input to detect pump status by measuring the pump current or as a binary input to measure pump state

as a discrete input (on/off). Configure each pump separately. Also, there is a Network Status input to read the

pump status, if available (See Device Address Binding).

Pump status options include:

Switch

Amperage

Network

None

If the pump status is not configured as None, the controller compares the status of the pump to the desired

commanded state. When the pump is commanded to run (ON), the pump status is checked and verified to match

the commanded state. If the pump status is not on, then a Pump n Fail Alarm (n indicates the pump number) is

generated after 30 seconds. When the pump is commanded OFF, if the pump status is still on, then a Pump n in

Hand Alarm is generated after 30 seconds.

Loop pump(s) constant flow

The Loop Control operates one or two pumps in constant flow mode to provide source water for the water source

heat pumps. For a single pump application, the pump operates as a lead pump whenever the Loop Control is in an

occupied mode. For two-pump systems, the Loop Control is automatically configured to operate the pumps as

lead/standby, where the second pump is available as a spare if the lead pump fails.

The following conditions must be true in order for the cooling algorithm to run:

Loop Control is occupied (standalone) or a pump requirement is received from Linkage

The Shutdown input is not active

If the above conditions are met, the pump is energized, otherwise it is disabled. After the pump output is enabled,

if a pump status type is configured, then the pump status will be checked to verify that the actual pump operation

matches the commanded state. For two-pump systems, if a pump failure is detected, the Loop Control energizes

the standby pump and verifies its operation if a pump status type has been selected. An alarm is generated for

any pump that has failed.

Loop Pump(s) with bypass valve differential pressure control

The Loop Control operates 1 or 2 constant speed pumps in variable flow mode using a bypass valve to control the

loop differential pressure and provide source water for the water source heat pumps. For a single pump

application, the pump operates as a lead pump whenever the Loop Control is in an occupied mode. For 2-pump

systems, the Loop Control is automatically configured to operate the pumps as lead/standby, where the second

pump is available as a spare if the lead pump fails. When the pumps are required to operate, the Loop Control

monitors the differential loop pressure input and adjusts the bypass valve position to maintain the required loop

pressure to meet the desired setpoint.

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The following conditions must be true in order for the cooling algorithm to run:

Loop Control is occupied (standalone) or a pump requirement is received from Linkage.

The Shutdown input is not active

The loop differential pressure input is valid

If the above conditions are met, the pump is energized, otherwise it is disabled. After the pump output is enabled,

if a pump status type is configured, then the pump status will be checked to verify that the actual pump operation

matches the commanded state. For 2-pump systems, if a pump failure is detected, the Loop Control will energize

the standby pump and verify its operation if a pump status type has been selected. An alarm is generated for any

pump that has failed.

After enabling the pump, the bypass is commanded to the full bypass position. The loop differential pressure is

then compared to the desired loop pressure setpoint and a PID calculates the bypass valve position required to

meet the loop pressure setpoint.

Loop Pump(s) with VFD loop differential pressure control

The Loop Control operates 1 or 2 pumps in variable flow mode using a VFD to control pump speed and provide

source water for the water source heat pumps. For a single pump application, the pump operates as a lead pump

whenever the Loop Control is in an occupied mode. For 2-pump systems, when the Loop Control is configured to

operate the pumps as lead/standby, the second pump is available as a spare if the lead pump fails. When the

pumps are required to operate, the Loop Control monitors the differential loop pressure input and adjusts the

speed of the lead pump to provide the required loop pressure to meet the desired setpoint.

The following conditions must be true in order for the cooling algorithm to run:

Loop Control is occupied (standalone) or a pump requirement is received from Linkage

The Shutdown input is not active

The loop differential pressure input is valid

If the above conditions are met, the pump is energized. Otherwise, it is disabled. After the pump output is enabled,

if a pump status type is configured, then the pump status is checked to verify that the actual pump operation

matches the commanded state. For 2-pump systems, if a pump failure is detected, the Loop Control energizes the

standby pump and verifies its operation, if a pump status type has been selected. An alarm is generated for any

pump that has failed.

After enabling the pump, the VFD is commanded to the user-configured Min VFD Output speed. The loop

differential pressure is then compared to the desired loop pressure setpoint and a PID calculates the required

pump speed to meet the setpoint.

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Two loop pumps with VFDs, lead/lag operation for loop differential

pressure control

The Loop Control operates 2-staged pumps in variable flow mode using a VFD to control pump speed and provide

source water for the water source heat pumps. For staged operation, the Loop Control Pump Staging must be set

to lead/lag, which uses the second pump as a lag pump for additional flow capacity. When the pumps are

required to operate, the Loop Control monitors the differential loop pressure input and adjusts the number of

operating pumps and the speed of the pumps to provide the required loop pressure to meet the desired setpoint.

The following conditions must be true in order for the cooling algorithm to run:

Loop Control is occupied (standalone) or a pump requirement is received from Linkage

The Shutdown input is not active

The loop differential pressure input is valid

If the above conditions are met, the lead pump is energized, otherwise all pumps are disabled. After the lead

pump output is enabled, if a pump status type is configured, then the pump status will be checked to verify the

actual pump operation matches the commanded state. If a pump failure is detected, the Loop Control will

energize the lag pump and verify its operation if a pump status type has been selected. An alarm is generated for

any pump that has failed.

After enabling the lead pump, the VFD is commanded to the user-configured Min VFD Output speed. The loop

differential pressure is then compared to the desired loop pressure setpoint and a PID calculates the required

pump speed to meet the setpoint. If the lead pump speed increases above the user-configured setpoint to enable

the lag pump (90% default), then the lag pump starts and slowly begins to ramp up to the current VFD

commanded output speed. The PID monitors the loop pressure and, as the lag pump increases speed and the

loop pressure increases, the PID output is reduced, as necessary, until both pumps achieve the same operating

speed.

If the loop flow requirement is reduced, and if both pumps are operating and the VFD speed drops below 65% (the

user-configured setpoint minus the configured hysteresis), then the lag pump is disabled.

Pump rotation

The ability to rotate pumps is available for any application with 2 pumps. Pump rotation is user-configured. The

following options are available:

Daily

Weekly

Monthly

Manual Rotation

Runtime

Never Rotate

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If you select daily, weekly, or monthly, the lead and standby or lag pump rotates as scheduled and on the

configured day and time. If you select manual rotation, you must rotate the pumps manually by selecting Rotate

from the drop-down menu. If you select Runtime, the pumps automatically rotate after the lead pump operating

hours reach the configured number of hours.

Tower fan control

The Loop Control has the ability to directly control up to 2 stages of variable speed (VFD-controlled) tower fans

through 2 cascade, staged, analog outputs or up to 4 stages of tower fans (on/off) using 4 binary outputs. The

first stage analog out may also be used alone or in conjunction with an external field-supplied staging controller to

convert the analog signal to the desired number of staged binary outputs.

Whenever the pumps are commanded to run, flow has been proven, and if the source water temperature is

greater than the loops configured Maximum Source Water Temp Setpoint minus 5F, or if Linkage is active,

above the Max Allowable Loop Temperature minus 5F (loop cooling setpoint), a PID loop calculates the desired

tower fan output.

See Loop Optimization (page 31) for details on loop setpoint optimization when Linkage is used and Loop

Optimization is set to Enable.

Analog (2-stage modulating) tower fan control

When configured for Modulating, the Loop Control provides 2 analog outputs to directly control up to 2 stages of

variable speed (VFD-controlled) tower fans. 2 binary outputs are also provided to control the tower dampers or

diverting valve, if required.

If the PID output is greater than 0, the binary output Tower Output Stage 1 is energized to allow for tower

operation and the analog output Tower Ouput 1 is set to the PID output value.

If the PID output exceeds the user-configurable lag tower enable setpoint, the second binary output Tower

Output Stage 2, is energized to allow for the second tower operation and the second analog output Tower

Output 2 is set to the PID output value.

If the tower fan's speed decreases below the user-configured lag tower enable setpoint, minus the hysteresis

value, the second tower is disabled.

The following conditions must be true for the cooling algorithm to run:

Loop Control is occupied (standalone) or a pump requirement is received from Linkage

The Shutdown input is not active

The loop flow must be proven

CAUTION The source water temp must be greater than the loop cooling setpoint to start and stay above the

setpoint minus the hysteresis value.

If the above conditions are met, the PID is activated and calculates a value required to maintain the loop cooling

setpoint. If the PID output value is greater than 0, the first stage binary tower output is enabled and the first stage

tower fan operates at the calculated output speed.

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After enabling the lead tower, if the tower fan speed increases above the user-configured setpoint, to enable the

lag tower output (71% default), then the lag tower is empowered by enabling the Tower Output Stage 2, while

slowly ramping up Tower Output 2 VFD-commanded output speed until both achieve the same operating speed.

If the tower fan speed decreases below the user-configured setpoint, minus the hysteresis (default 50%), the lag

tower output Tower Output Stage 2 is disabled and the Tower Output 2 VFD is commanded to 0%.

Staged tower fan control

The Loop Control provides the capability to control from 1 to 4 stages of tower fans. When configured for staged

control, the user must select the number of tower stages. The Loop Control provides 4 dedicated binary outputs

that can directly control up to 4 stages of tower fans.

The following conditions must be true for the cooling algorithm to run:

Loop Control is occupied (standalone) or a pump requirement is received from Linkage

The Shutdown input is not active

The loop flow must be proven

CAUTION The source water temp must be greater than the loop cooling setpoint to start and stay above the

setpoint minus the hysteresis value.

If the above conditions are met, the PID is activated and calculates a value required to maintain the desired

setpoint. The PID output value is compared to the calculated Enable % based on the number of tower stages

configured and, if it is greater than that value, the appropriate stages are energized.

The formula below determines the stage enable point:

Enable % = 100 / [Number of stages +1]

Each stage number is multiplied by the Enable % to determine when that stage is enabled.

EXAMPLE In a 3 stage application, the Enable % equals 100 / 3+1 or 25%.

Therefore, Stage 1 is energized when the PID output > 25%, Stage 2 at > 50%, and stage 3 at > 75%.

Once a stage is energized, a user-configurable hysteresis prevents short cycling (defaults: Stage 1 hysteresis is

10%, all others are 20%). As the loop temperature is satisfied and falls below the setpoint, the PID output

decreases and stages are disabled in sequential order from highest to lowest.

Boiler control

The Loop Control can directly control up to 2 stages of variable fire boilers using 2 cascade, staged, analog

outputs, or up to 4 stages of boilers (on/off) using 4 binary outputs.

The first stage analog output may be used alone, or in conjunction with an external field-supplied staging

controller, to convert the analog signal to the desired number of staged binary outputs.

Whenever the pumps are commanded to run, flow has been proven, and if the source water temperature is less

than the loops configured Minimum Source Water Temp Setpoint plus 5F, or if Linkage is active, below the Min

Allowable Loop Temperature plus 5F (loop heating setpoint), a PID loop calculates the desired tower fan output.

See Loop Optimization (page 31) for details on loop setpoint optimization when Linkage is used and Loop

Optimization is set to Enable.

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Analog (2-stage modulating) boiler/valve control

When configured for Modulating, the Loop Control provides 2 analog outputs to directly control up to 2 stages of

variable fire boilers or a hot water mixing valve.

If the PID output is greater than 0, the analog output, Boiler Output 1, is set to the PID output value.

If the PID output exceeds the user configurable lag boiler enable setpoint, the second analog output, Boiler

Output 2, will ramp up to the PID output value.

If the PID output decreases below the user-configured lag boiler enable setpoint, minus the hysteresis value,

the second boiler is disabled.

The following conditions must be true for the boiler algorithm to run:

Loop Control is occupied (standalone) or a pump requirement is received from Linkage

The Shutdown input is not active

The loop flow must be proven

CAUTION The source water temp must be less than the loop heating setpoint to start and stay below the

setpoint plus the hysteresis value

If the above conditions are met, the PID is activated and calculates a value required to maintain the loop heating

setpoint. If the PID output value is greater than 0, the first stage boiler output is set to the PID value.

If the PID output increases above the user-configured setpoint to enable the lag boiler (99% default), then the lag

boiler is enabled and slowly ramps Boiler Output 2, until both achieve the same output value.

If the boiler output PID decreases below the user-configured setpoint, minus the hysteresis (default 5%), the lag

boiler output Boiler Output 2, is commanded to 0%.

Staged boiler control

The Loop Control provides the capability to control from 1 to 4 stages of boilers. When configured for staged

control, the user must select the number of boiler stages. The Loop Control provides 4 dedicated binary outputs

that can directly control up to 4 stages.

The following conditions must be true for the cooling algorithm to run:

Loop Control is occupied (standalone) or a pump requirement is received from Linkage

The Shutdown input is not active

The loop flow must be proven

CAUTION The source water temp must be less than the loop heating setpoint to start and stay below the

setpoint plus the hysteresis value.

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If the above conditions are met, the PID is activated and calculates a value required to maintain the desired

setpoint. The PID output value is compared to the calculated Enable % based on the number of boiler stages

configured and, if it is greater than that value, the appropriate stages are energized.

The formula below determines the stage enable point:

Enable % = 100 / [Number of stages +1]

Each stage number is multiplied by the Enable % to determine when that stage is enabled.

EXAMPLE In a 3 stage application, the Enable % equals 100 / 3+1 or 25%.

Therefore, Stage 1 is energized when the PID output > 25%, Stage 2 at > 50%, and stage 3 at > 75%.

Once a stage is energized, a user-configurable hysteresis prevents short cycling (defaults: Stage 1 hysteresis is

10%, all others are 20%). As the loop temperature is satisfied and falls below the setpoint, the PID output

decreases and stages are disabled in sequential order from highest to lowest.

Condenser Water Linkage

The Loop Control receives and sends information from any linked Carrier WSHP Open controllers through

Condenser Water Linkage. When required to operate, the source water loop pumps supply water for all the

connected water source heat pumps. The Loop Control receives the composite heat pumps operating water

temperature limits, occupancy status, and the total demand for both heating and cooling from all the connected

WSHP Open equipment. In return, the Loop Control sends the loop pump status and loop temperature to each

heat pump so each WSHP Open can verify it is capable to operate its compressors safely without causing a

lockout condition to occur.

NOTE The minimum and maximum loop temperatures for heating and cooling are configured separately in each

WSHP Open controller. Refer to the specific requirements for acceptable loop temperatures in the Product Data

for each individual heat pump.

Loop optimization

The UC Open XP has the ability to provide loop optimization for system utilizing WSHP Open controllers and

Linkage. Loop optimization provides a more efficient operating system by adjusting the loop temperature up or

down, based on the number of heat pumps operating in the heating or cooling mode. Loop Optimization must be

set to Enable to use this feature.

Loop optimization provides two optimization methods. If Loop Calculation Type is set to 15 day average (default),

the calculation takes into effect 15 days of rolling data to determine the optimum loop temperature. This

seasonally adjusts to building operating conditions and filters out one-day event occurrences. If Loop Calculation

Type is set to Daily, only the last 24 hours of data is used. All data is accumulated every hour to record how many

heat pumps were operating in heating mode and how many were operating in cooling mode.

Loop Calculation determines how the data is used to determine the optimum loop temperature. If it is set to

Weighted Average (default), the actual number of heat pumps operating each hour, in each mode, are taken into

account to ensure the loop is optimized for the largest heat pump energy usage. If it is set to Equally Weighted,

then each hour is treated the same, regardless of the total number of heat pumps operating during that hour.

Finally, Loop differential ensures sufficient hysteresis between the setpoint used for loop heating control and the

setpoint used for loop cooling control. The individual setpoints are determined from the calculated ideal loop

setpoint and the position of that setpoint between the allowable minimum and maximum loop temperatures.

The default Loop differential is set to 10F but is user-adjustable and must be set to at least 5F or higher.

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WSHP compressor enable command output

The Loop Control has a binary output and a network-accessible BACnet BV that can be used to interlock the

operation of the connected WSHP equipment in standalone application without Linkage. The output determines

when the individual WSHP units can safely operate.

The output is activated whenever the pumps are commanded to run and flow has been detected via the Source

Water Flow binary input or the Network Flow input and the loop temperature is between the configured Min

Source Water Temp Alarm Limit and Max Source Water Temp Alarm Limit.

Alarm lamp output

The UC Open XP has a binary output that can be connected to a local alarm lamp to indicate a problem with loop

flow, the loop pumps, or the source water supply temperature.

If Linkage is inactive, the alarm output is activated whenever the source water supply temperature exceeds the

configured Maximum Source Water Temp or drops below the configured Minimum Source Water Temp. It will

also be activated whenever the pumps are commanded to operate and loop flow is not detected or if any pump

fails.

If Linkage is active, the alarm output is activated using the same criteria as above, except the source water supply

temperature is compared to the minimum and maximum allowable source water temperature limits received from

the Open WSHPs through Linkage, rather than the configured values.

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If you have problems mounting, wiring, or addressing the UC Open XP or the UC Open XP IO, contact Carrier

Control Systems Support.

NOTE To help you troubleshoot, obtain a Module Status (Modstat) from the controller and review the System Error

and Warning details.

UC Open XP LED's

The LEDs indicate if the controller is speaking to the devices on the network. The LEDs should reflect

communication traffic based on the baud rate set. The higher the baud rate the more solid the LEDs become.

Verify the LED patterns by cycling power to the controller and noting the lights and flashes.

LEDs Status

Power Lights when power is being supplied to the controller.

NOTE The UC Open XP is protected by internal solid state Polyswitches on the incoming power and

network connections. These Polyswitches are not replaceable, but they will reset themselves if the

condition that caused the fault returns to normal.

Rx Lights when the controller receives data from the network segment; there is an Rx LED for Ports 1

and 2.

Tx Lights when the controller transmits data from the network segment; there is an Rx LED for Ports 1

and 2.

Run Lights based on controller health.

Error Lights based on controller health.

The Run and Error LED's indicate controller and network status.

If Run LED shows... And Error LED shows... Status is...

1 flash per second 1 flash per second, alternating

with the Run LED

The controller files are archiving. Archive is

complete when Error LED stops flashing.

2 flashes per second Off Normal

2 flashes per second 2 flashes,

alternating with Run LED

Five minute auto-restart delay after system error

2 flashes per second 3 flashes,

then off

The controller has just been formatted

2 flashes per second 4 flashes, then pause Two or more devices on this network have the

same network address

2 flashes per second 1 flash per second The controller is alone on the network

Troubleshooting

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If Run LED shows... And Error LED shows... Status is...

2 flashes per second On Exec halted after frequent system errors, due to:

Controller halted

Program memory corrupted

One or more programs stopped

5 flashes per second On Exec start-up aborted, Boot is running

5 flashes per second Off Firmware transfer in progress, Boot is running

7 flashes per second 7 flashes per second,

alternating with Run LED

Ten second recovery period after brownout

14 flashes per second 14 flashes per second,

alternating with Run LED

Brownout

On On Failure. Try the following solutions:

Turn the UC Open XP off, then on.

Download memory to the UC Open XP.

Replace the UC Open XP.

NOTE If you resolve the issue but the Error LED does not turn off, cycle power to the controller.

Expander LED's

The LEDs indicate if the controller is speaking to the devices on the network. The LEDs should reflect

communication traffic based on the baud rate set. The higher the baud rate the more solid the LEDs become.

LEDs Status

Power Lights when power is being supplied to the controller.

NOTE The UC Open XP is protected by internal solid state Polyswitches on the

incoming power and network connections. These Polyswitches are not replaceable

and will reset themselves if the condition that caused the fault returns to normal.

Rx Lights when the controller receives data from the network segment; there is an Rx

LED for Ports 1 and 2.

Tx Lights when the controller transmits data from the network segment; there is an Rx

LED for Ports 1 and 2.

Run Lights based on controller health. See table below.

Error Lights based on controller health. See table below.

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The Run and Error LED's indicate expander and network status.

If Run LED shows... And Error LED shows... Status is..

2 flashes per second Off Normal

5 flashes per second 2 flashes per second Boot is running or driver is updating

5 flashes per second On Fatal error. Replace expander or return

for repair.

To get the serial number

If you need the UC Open XP's serial number when troubleshooting, the number is on:

A laser-etched number and QR code on the inside circuit board

a sticker on the back of the main controller board (prior to 2019)

a Module Status report (Modstat) under Core (or Main) board hardware

To obtain a modstat in the i-Vu interface:

1 Select the UC Open XP in the navigation tree.

2 Right-click and select Module Status.

To restore defaults

WARNING This erases all archived information and user-configuration settings. You will have to reconfigure

all custom settings. It is recommended to restore the factory defaults only under the guidance of Carrier Control

Systems Support.

To erase volatile memory data and restore factory default configuration settings:

1 Turn off the UC Open XP's power switch.

2 Put the Factory Defaults jumper on.

3 Turn on the UC Open XP's power switch.

4 Remove the Factory Defaults jumper.

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Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

To replace the UC Open XP's battery

To determine when to replace the battery, remove power and measure the voltage. If the voltage is below 2.9

volts, you need to replace the battery.

CAUTION Power must be ON to the UC Open XP when replacing the battery, or your date, time, and trend

data will be lost.

1 Remove the battery from the controller, making note of the battery's polarity.

2 Insert the new battery, matching the battery's polarity with the polarity indicated on the UC Open XP.

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Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

FCC Compliance

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part

15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference

when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate

radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause

harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause

harmful interference in which case the user will be required to correct the interference at his own expense.

CAUTION Changes or modifications not expressly approved by the responsible party for compliance could

void the users authority to operate the equipment.

CE Compliance

WARNING This is a Class A product. In a domestic environment, this product may cause radio interference

in which case the user may be required to take adequate measures.

BACnet Compliance

Compliance of listed products to requirements of ASHRAE Standard 135 is the responsibility of BACnet

International. BTL is a registered trademark of BACnet International.

Compliance

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Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

These wire lists represent all the possible points for this application. The points that are actually used in your

application depend on the equipment options you select in EquipmentBuilder.

UC Open XP wire list

Open System Network

UC Open XP Universal Controller

Project Name:

Location:

Controller:

Network Number:

MAC Address:

Aux

power

1 5V Jumper right 2

1 24V Jumper left 2

2 GND

Point/

Cable#

Inputs

(+)

(G) Input

Type

Jumper

Position

of Pins

I/O Sensor

code

Equipment

Name

Point

Name

3 5 0-10 Upper UI-1

3 5 Pulse/Other Middle

3 5 4-20 Lower

4 5 0-10 Upper UI-2

4 5 Pulse/Other Middle

4 5 4-20 Lower

6 8 0-10 Upper UI-3

6 8 Other Middle

6 8 4-20 Lower

7 8 0-10 Upper UI-4

7 8 Other Middle

7 8 4-20 Lower

9 11 0-10 Upper UI-5

9 11 Other Middle

9 11 4-20 Lower

10 11 0-10 Upper UI-6

10 11 Other Middle

10 11 4-20 Lower

12 14 0-10 Upper UI-7

12 14 Other Middle

12 14 4-20 Lower

13 14 0-10 Upper UI-8

13 14 Other Middle

Appendix A: UC Open XP and UC Open XP IO wire lists

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13 14 4-20 Lower

15 17 0-10 Upper UI-9

15 17 Other Middle

15 17 4-20 Lower

16 17 0-10 Upper UI-10

16 17 Other Middle

16 17 4-20 Lower

18 20 0-10 Upper UI-11

18 20 Other Middle

18 20 4-20 Lower

19 20 0-10 Upper UI-12

19 20 Other Middle

19 20 4-20 Lower

Point/

Cable#

Analog

Outs

(+)

(G) A-Output

Type

Jumper Position

of Pins

I/O Sensor

code

Equipment

Name

Point

Name

1 2 mA Left 2 pins AO-1

Volt Right 2 pins

3 4 mA Left 2 pins AO-2

Volt Right 2 pins

5 6 0-10 N/A AO-3

7 8 0-10 N/A AO-4

9 10 0-10 N/A AO-5

11 12 0-10 N/A AO-6

Point/

Cable#

Binary

Outs

(+)

(G) B-Output

Type

Jumper Position

of Pins

I/O Sensor

code

Equipment

Name

Point

Name

1 2 N.C. N/A

BO-1

3 2 N.O.

4 5 N.C. N/A BO-2

6 5 N.O.

7 8 N.C. N/A BO-3

9 8 N.O.

10 11 N.C. N/A BO-4

12 11 N.O.

13 14 N.C. N/A BO-5

15 14 N.O.

16 17 N.C. N/A BO-6

18 17 N.O.

NOTE Only UI-1 and UI-2 have Pulse Count Ability (meter).

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UC Open XP IO wire list

Open System Network

UC Open XP IO Universal Controller Expander

Project Name:

Location:

Controller:

Network Number:

MAC Address:

Point/

Cable#

Inputs

(+)

(G) Input

Type

Jumper

Position

of Pins

Sensor

code

Equipment

Name

Point

Name

1 2 BI BI-1

3 4 BI BI-2

5 6 BI BI-3

7 8 BI BI-4

9 10 BI BI-5

11 12 BI BI-6

13 14 BI BI-7

15 16 BI BI-8

1 2 0-5V No Jumper UI-9

1 2 Therm/Dry

Contact Jumper

3 4 0-5V No Jumper UI-10

3 4 Therm/Dry

Contact Jumper

5 6 0-5V No Jumper UI-11

5 6 Therm/Dry

Contact Jumper

7 8 0-5V No Jumper UI-12

7 8 Therm/Dry

Contact Jumper

9 10 0-5V No Jumper UI-13

9 10 Therm/Dry

Contact Jumper

11 12 0-5V No Jumper UI-14

11 12 Therm/Dry

Contact Jumper

13 14 0-5V No Jumper UI-15

13 14 Therm/Dry

Contact Jumper

15 16 0-5V No Jumper UI-16

15 16 Therm/Dry

Contact Jumper

Point/

Cable#

Binary

Outs

(+)

(G) B-Output

Type

Jumper

Position

of Pins

Sensor

code

Equipment

Name

Point

Name

1 2 N.O. N/A BO-1

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3 4 N.O N/A BO-2

5 6 N.O. N/A BO-3

7 8 N.O. N/A BO-4

9 10 N.O. N/A BO-5

11 12 N.O. N/A BO-6

13 14 N.O. N/A BO-7

15 16 N.O. N/A BO-8

NOTE All inputs can be pulse inputs.

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Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

The following tables describe all of the possible settings for your controller on the i-Vu or Field Assistant Properties tab.

See Loop Control Points/Properties on the Equipment Touch for the points and properties available on the Equipment

Touch interface.

Status

Navigation: i-Vu / Field Assistant: Properties > Control Program > Status

Point Name/Description Range

Run Status The current operational status of the loop control system. R: Off/Running

Source Water Supply Temp The water temperature being supplied to the WSHPs. R: -56 to 245F

Source Water Return Temp The water temperature returning from the WSHPs. R: -56 to 245F

Pump 1 Operation Status Pump 1's status. R: Off - OK to Run

On as Lead

Waiting in Standby

On as Replacement

Running as Lag

Failed

Pump 1 VFD Speed The current commanded speed of the VFD. R: 0 to 100%

Pump 2 Operation Status Pump 2's status. R: Off - OK to Run

On as Lead

Waiting in Standby

On as Replacement

Running as Lag

Failed

Pump 2 VFD Speed The current commanded speed of the VFD. R: 0 to 100%

Delta Pressure The differential pressure between the supply and return source water. R: -45 to 145 psi

Bypass Valve Percent The percent the bypass value is open or closed. R: 0 to 100%

Boiler Output 1 The Boiler Output 1 analog output's current commanded state. R: 0 to 100%

Boiler Output 2 The Boiler Output 2 analog output's current commanded state. R: 0 to 100%

Tower Output 1 The Tower Output 1 analog output's current commanded state. R: 0 to 100%

Tower Output 2 The Tower Output 2 analog output's current commanded state. R: 0 to 100%

Loop Optimization The status of the Loop Optimization routine. R: Disabled/Enabled

Current Tower Setpoint The current tower setpoint. R: 40 to 120F

Current Loop Setpoint The current loop setpoint. R: 40 to 120F

Appendix B: Loop Control Points/Properties

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Point Name/Description Range

Current Boiler Setpoint The current boiler's setpoint. R: 45 to 140F

Outdoor Air Temperature The outdoor air temperature used for control. R: -56 to 245F

OA Relative Humidity The outdoor air relative humidity sensor's current value. R: 0 to 100%

Wet Bulb Temperature The calculated wet bulb's current value. R: -56 to 245F

Shutdown When Active, provides a means to stop heating and cooling in an orderly

manner. All alarms are reset and current active alarms are displayed.

R: Inactive/Active

Unit Configuration

Navigation: i-Vu / Field Assistant: Properties > Control Program > Configuration > Unit Configuration

Point Name/Description Range

On Off Auto HOA switch

Auto The pumps cycle on and off based on demand or occupancy

Locked Unit is locked on or off

Auto

Locked (ON/OFF)

Pump Start Enables or disables the pumps based on demand only or on occupancy-

or-demand.

Demand Only

Occ or Demand

Minimum Heat Pump Demand Number of requests required to start the loop pumps

when the pumps are being controlled by heat pump demand.

0 - 100

Power Fail Restart Delay How long the controller delays normal operation after the

power is restored. Typically used to prevent excessive demand when recovering from a

power failure.

60 seconds

0 to 600 seconds

Pump Stop Delay How long the pump continues to run after the application no longer

requires pump operation.

15 minutes

0 to 9999 minutes

Occupancy Schedules If enabled, the unit follows the occupancy schedule as

configured.

Disable

Disable/Enable

Rotation Method

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Point Name/Description Range

Rotation Method

Daily Rotates the pumps daily at a specified time.

Weekly Rotates the pumps weekly on a specified day and time.

Monthly Rotates the pumps monthly on a specified day and time.

Manual Rotation Manually rotates the pumps when the operator commands it.

Runtime Rotates the pumps after the lead pump reaches a specified number of

runtime hours.

Never Rotate Does not allow the pumps to rotate.

Daily

Weekly

Monthly

Manual Rotation

Runtime

Never Rotate

Rotation Method Parameters Specify further details of the selected method.

Method Enter...

Daily time of the day to rotate the lead pump

NOTE Enter the time of day in Defined

Time for Rotation. The time of day you

specify is used during a weekly or monthly

rotation.

13:00

00:00 to 23:59

Weekly day of the week to rotate the lead pump

performed at the time of day specified in

Defined Time for Rotation

3 (Wednesday)

1 to 7 (Monday to Sunday)

Monthly day of the month to rotate the lead pump

performed at the time of day specified in

Defined Time for Rotation

1 to 31

Manual

Rotation

manually rotate the lead pump D:

Do not Rotate

Rotate

Do Not Rotate

Runtime number of runtime hours before rotating

the lead pump

360 hrs

24 - 9999 hrs

Runtime since last rotation:

- Pump 1

- Pump 2

0 - 360 hrs

Defined Time for Rotation Specify the time of day (24 hour format) for automatic

rotation based on the method and schedule you selected.

(Not applicable to Runtime Equalization.)

13:00

00:01 to 23:99

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Setpoints

Navigation: i-Vu / Field Assistant: Properties > Control Program > Configuration > Setpoints

Point Name/Description Range

Maximum Source Water Temp Setpoint The maximum allowable source water

temperature. This is the upper limit setpoint when Linkage is not active.

90F

55 to 115F

Max Source Water Temp Alarm Limit The source water temperature must exceed this

value to generate a High Source Water Temperature alarm. This is the lower limit

setpoint when Linkage is not active.

125F

75 to 140F

Minimum Source Water Temp Setpoint The minimum allowable source water

temperature.

60F

20 to 70F

Min Source Water Temp Alarm Limit The source water temperature must be lower

than this value to generate a Low Source Water Temperature alarm.

40F

15 to 70F

Tower Approach The temperature in degrees above the outdoor air's wet bulb

temperature that is used to limit the lowest loop setpoint, when Loop Optimization is

active.

12F

5 to 25F

Source Loop Diff Press. Setpoint The differential pressure setpoint maintained by the

loop system.

15 psi

5 to 50 psi

Lag Pump Enables lag pump if PID control output is greater than XX%, hyst X%. D:

90%, 25%

50 to 99%

5 to 75%

Lag Boiler Enables lag boiler if PID control output is greater than XX%, hyst X%. D:

99%, 50%

50 to 99%

5 to 75%

Lag Tower Enables lag tower if PID control output is greater than XX%, hyst XX. D:

71%, 21%

50 to 99%

5 to 50%

Loop Setpoint Optimization*

Enable Loop Optimization Determines if loop optimization is enabled or disabled. D:

Enable

Disable/Enable

Loop Calculation Type You can choose between 15 Day Average (generally a better

choice for larger buildings which are less subject to weather changes) and a Daily

Average.

15 day Average

Daily

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Point Name/Description Range

Loop Calculation When using the 15 day rolling average loop calculation type

(described above), the:

Weighted Average - weights the actual number of heat pumps in heating or cooling mode every day when

calculating the average setpoint

Equally Weighted - gives equal weight to the daily averages (percentage of heat pumps in heating or cooling

mode) when calculating the average setpoint

Weighted Average

Equally Weighted

Loop Differential The difference between the heating (boiler) and cooling (tower)

setpoints.

10F

5 to 50F

* Loop Optimization requires Linkage to Carrier Open WSHPs.

Alarm Configuration

Navigation: i-Vu / Field Assistant: Properties > Control Program > Configuration > Alarm Configuration

Point Name/Description Range

Differential Pressure Alarm Hysteresis The value that the differential pressure must

change from the alarm setpoint to release a High or Low Differential Pressure Alarm.

5 psi

2 to 25 psi

Pump 1 Status Alarm(s) Generates a Pump Fail Alarm if the feedback status of

pump 1 has not turned on after it has been enabled. If the status is on, and the pump

has not been enabled, it will enable the Pump in Hand Alarm.

30 seconds

0 to 9999 seconds

Pump 1 Runtime Alarm The value that the runtime must exceed to generate a

Runtime Alarm.

10000 hr

0 to 99999 hr

Pump 2 Status Alarm(s) Generates a Pump Fail Alarm if the feedback status of

pump 2 has not turned on after it has been enabled. If the status is on and the pump

has not been enabled, it will enable the Pump in Hand Alarm.

30 seconds

0 to 9999 seconds

Pump 2 Runtime Alarm The value that the runtime must exceed to generate a

Runtime Alarm.

10000 hr

0 to 99999 hr

Pump Lockout on Catastrophic Loss of Water

Main Loop Flow Status Alarm(s) Generates a Main Loop Flow Status Alarm if the

feedback status of loop pumps has not turned on after it has been enabled.

180 seconds

0 to 9999 seconds

Catastrophic Pump Lockout Shows status of pumps. R: OK

Locked Out

Disable pumps should the loop lose main CW Flow Disables all pumps if there is no

flow. Bypasses any lead/standby routines. You must manually reset the system.

No/Yes

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Service Configuration

Navigation: i-Vu / Field Assistant: Properties > Control Program > Configuration > Service Configuration

Point Name/Description Range

Number Of Pumps The number of pumps in the system. D:

One

Two

Pump Status Type The type of status that the pumps deliver to the loop controller to

indicate they are on.

Switch

Amperage

Network

None

Pump Control This is the type of pump/water loop system being controlled.

Constant Volume Turns the pump on and leaves it on until scheduled to turn off

or the demand has been satisfied.

Constant Vol w/Bypass Turns the pump on and then maintains a differential

pressure with the bypass valve.

Vfd Turns the pump on and maintains a differential pressure by modulating the

speed of the Vfd.

Constant Volume

Constant Vol w/Bypass

Vfd

Pump Staging If there are 2 pumps controlled by a Vfd, this setting is adjustable. For

other combinations, it defaults to Lead/Standby.

It determines the type of pump sequencing.

Lead/Standby - One pump runs as the lead pump and the other pump waits in

standby.

Lead/Lag One pump runs as the lead pump and, if the additional capacity is

required, brings the second pump on as the lag pump. (Only available if Pump

Control is set to Vfd.)

Lead/Standby

Lead/Lag

Cooling Type The cooling tower /_fan control configuration. D:

Modulating

1 - Stage

2 - Stage

3 - Stage

4 - Stage

Heat Type The boiler output control configuration. D:

Modulating

1 - Stage

2 - Stage

3 - Stage

4 - Stage

Sump Level Control Enable or disable sump level control. D:

Disable

Disable/Enable

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Point Name/Description Range

Remote Contact Unocc Logic State Sets the remote contact's normal logic state. D:

Open

Open/Closed

Flow Type Sets the Source Water Flow switch's flow type. When set to Normal, the

flow switch contact closes when water flow is detected.

Normal

Inverted

Outdoor Air Sensor Type The location of the source of the OAT input value. D:

Local OAT Sensor

None

Local OAT Sensor

Network OAT

Outdoor Air Temp Calibration A calibration offset value allows the local outdoor air

temperature sensor to be adjusted to match a calibrated standard measuring the

temperature in the same location.

0.00

-9.9 to 10F

Outdoor Air Temperature The outdoor air temperature value being used for control. R: -56 to 245F

OA Relative Humidity Sensor Type - The location of the source of the Outdoor Air

Relative Humidity input value.

Local RH Sensor

None

Local RH Sensor

Network RH

OA Relative Humidity Calibration A calibration offset value allows the local relative

humidity sensor to be adjusted to match a calibrated standard measuring the space

relative humidity in the same location.

0%rh

-15 to 15%rh

OA Relative Humidity The current value of the local relative humidity sensor. R: 0 to 100%rh

Differential Pressure Sensor Type The location of the source of the differential

pressure input value.

Local DP Sensor

Network DP

Pump 1 Trip Point Determines when Pump 1 is on.

Configuration > Service Configuration > Pump Status Type must be set to Amperage.

3.00 A

0 to 9999.00 A

Pump 2 Trip Point Determines when Pump 2 is on.

Configuration > Service Configuration > Pump Status Type must be set to Amperage.

3.00 A

0 to 9999.00 A

System Outdoor Air Temperature Allows the controller to use an outdoor air

temperature value from the network. The remote controller must have a network-

accessible outdoor air temperature sensor value.

R: N/A

System Outdoor Air RH Allows the controller to use an outdoor air relative humidity

value from the network. The remote controller must have a network-accessible OA

relative humidity sensor value.

R: N/A

Source Water Diff. Pressure Allows using another controller's differential pressure

sensor from the network. The remote controller must have a network-accessible

differential pressure sensor value.

R: N/A

System Occupancy Allows reading and using another controller's occupancy status

value over the network. The remote controller must have a network-accessible

Occupancy Status point.

R: Unoccupied/Occupied

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Point Name/Description Range

Network Flow Input Allows using another controller's flow sensor value over the

network. The remote controller must have a network-accessible flow sensor value.

R: No Flow/Flow

SW Pump 1 Network Status Allows the ability to get SW Pump 1 status over the

network. The remote point must be a network-accessible value.

R: Off/On

SW Pump 2 Network Status Allows the ability to get SW Pump 2 status over the

network. The remote point must be network-accessible.

R: Off/On

Pump1 Network S/S Allows starting Pump 1 over the network. The remote Start/Stop

point must be network-accessible.

R: Off/On

Pump2 Network S/S Allows starting Pump 2 over the network. The remote Start/Stop

point must be network-accessible.

R: Off/On

Pump 1 VFD Network Output Allows managing the Pump 1 VFD speed over the

network. The remote device must have a network-accessible VFD control point.

R: 0 to 100%

Pump 2 VFD Network Output Allows managing the Pump 2 VFD speed over the

network. The remote device must have a network-accessible VFD control point.

R: 0 to 100%

CHW Byp Vlv Network Output Allows managing the bypass valve position over the

network. The remote device must have a network-accessible Bypass Valve control point.

R: 0 to 100%

Boiler Output 1 Allows managing the Boiler 1 output over the network. The remote

point must be network-accessible.

R: 0 to 100%

Boiler Output 2 Allows managing the Boiler 2 output over the network. The remote

point must be network-accessible.

R: 0 to 100%

Tower Output 1 Allows managing the Tower 1 output over the network. The remote

point must be network-accessible.

R: 0 to 100%

Tower Output 2 Allows managing the Tower 2 output over the network. The remote

point must be network-accessible.

R: 0 to 100%

Lockout

Lockout If disabled, allows pumps to continue to cycle until either pump status is

attained. If enabled it will lockout out the pumps after they have failed 3 (default value)

consecutive times

Disabled

Disabled/Enabled

Lock out both pumps if both have failed "#" consecutive times. - Set the number of

pump failures.

1 to 5

Manually release lockout? If the pump lockout is enabled and the pumps are locked

out, you can manually release the lockout.

Off

Off/Release

Pump Control

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Lockout

Loop Bypass Valve VFD PID (BPID) This Bacnet Object determines what the variable

frequency drive output should be.

NOTE The following default values should be changed only by a technician trained in PID

Loop algorithms

Action reverse

Update Interval 1:00 (mm:ss)

Proportional 10

Integral 2.0

Derivative 0

Deadband 0

Bias 30

Bypass Valve Type Defines the normal position of the Bypass valve with no signal. D:

Normally Closed

Normally Open

VFD PID (BPID) This Bacnet Object determines what the variable frequency drive target

output should be.

NOTE The following default values should be changed only by a technician trained in PID

Loop algorithms

Action reverse

Update Interval 1:00 (mm:ss)

Proportional 10

Integral 5.0

Derivative 0

Deadband 0

Bias 30

Minimum VFD Output The minimum output signal the control supplies to the VFD as a

percentage of its range. The balancer can set this to adjust the units minimum flow.

20%

10 to 50%

The following values for Boiler Control are factory defaults or typical values.

Boiler Control

Enable Boiler if Source Water Temp xx deg < Minimum Source Temp Setpoint xx deg + __

deg,

5 deg

2 to 15F

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Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

Lockout

hysterisis __. Unless Loop Optimization is enabled. D:

3 deg

1 to 10F

Boiler Setpoint is ___ deg. D:

60F

40 to 80F

Heat stage 1 is __.

On/Off

Heating Stage 1:

Enable Heating Stage 1 if Heating output > _.__%.

NOTE This value is automatically calculated based on number of stages configured.

R: 20 to 50%

hysterisis __. D: 10%

Min heating stage #1 on time is _:__ (mm:ss) R: 3:00 mm:ss

Min heating stage #1 off time is _:__ (mm:ss) D: 0:00 mm:ss

Once disabled, delay Heating Stage 1 for _:__ (mm:ss) after Heating Stage 2 is off. D: 2:00 mm:ss

Heat stage 2 is __.

On/Off

Heating Stage 2:

Enable Heating Stage 2 _:__ (mm:ss) after Heating Stage 1 is enabled D: 5:00 mm:ss

and if Heating output >__._%.

NOTE This value is automatically calculated if number of stages configured > 1.

R: 40 to 66%

hysterisis __. D: 20%

Min heating stage #2 on time is _:__ (mm:ss) D: 3:00 mm:ss

Min heating stage #2 off time is _:__ (mm:ss) D: 0:00 mm:ss

Once disabled, delay Heating Stage 2 for _:__ (mm:ss) after Heating Stage 3 is off. D: 2:00 mm:ss

Heat stage 3 is __.

On/Off

Heating Stage 3:

Enable Heating Stage 3 _:__ (mm:ss) after Heating Stage 2 is enabled D: 5:00 mm:ss

and if Heating output > __%,

NOTE This value is automatically calculated if number of stages configured > 2.

R: 60 to 75%

hysterisis __% D: 20%

Min heating stage #3 on time is _:__ (mm:ss) D: 3:00 mm:ss

Min heating stage #3 off time is _:__ (mm:ss) D: 0:00 mm:ss

Once disabled, delay Heating Stage 3 for _:__ (mm:ss) after Heating Stage 4 is off. D: 2:00 mm:ss

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Lockout

Heat stage 4 is __.

On/Off

Heating Stage 4:

Enable Heating Stage 4 _:__ (mm:ss) after Heating Stage 3 is enabled and D: 5:00 mm:ss

if Heating output > __%,

NOTE This value is automatically calculated if the number of stages configured > 3.

D: 80%

hysterisis __. D: 20%

Min heating stage #4 on time is _:__ (mm:ss) D: 3:00 mm:ss

Min heating stage #4 off time is _:__ (mm:ss) D: 0:00 mm:ss

The following values for Tower Control are factory defaults or typical values.

Tower Control

Enable Tower if Source Water Temp xx deg > Minimum Source Temp Setpoint xx deg - __

deg,

5 deg

2 to 15F

hysterisis __. Unless Loop Optimization is enabled. D:

3 deg

1 to 10F

Tower setpoint is __ deg. D:

90F

75 to 110F

Cooling Stage 1 is __.

On/Off

Cooling Stage 1:

Enable Cooling Stage 1 if Cooling output > __%

NOTE This value is automatically calculated based on number of stages configured.

R: 20 to 50%

hysterisis __. D: 10%

Once disabled, delay Cooling Stage 1 for _:__ mm:ss after Cooling Stage 2 is off. D: 5:00 mm:ss

Cooling Stage 2 is __.

On/Off

Cooling Stage 2:

Enable Cooling Stage 2 _:__ mm:ss D: 5:00 mm:ss

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Lockout

after Cooling Stage 1 is enabled and if Cooling output > __.__%,

NOTE This value is automatically calculated if number of stages configured > 1.

R: 40 to 66%

hysterisis __. D: 20%

Once disabled, delay Cooling Stage 2 for _:__ mm:ss after Cooling Stage 3 is off. D: 5:00 mm:ss

Cooling Stage 3 is __.

On/Off

Cooling Stage 3:

Enable Cooling Stage 3 _:__ mm:ss D: 5:00 mm:ss

after Cooling Stage 2 is enabled and if Cooling output > __.__%,

NOTE This value is automatically calculated if number of stages configured > 2.

R: 60 to 75%

hysterisis __. D: 20%

Once disabled, delay Cooling Stage 3 for _:__ mm:ss after Cooling Stage 4 is off. D: 5:00 mm:ss

Cooling Stage 4 is __.

On/Off

Cooling Stage 4:

Enable Cooling Stage 4 _:__ mm:ss D: 5:00 mm:ss

after Cooling Stage 3 is enabled and if Cooling output > __.__%,

NOTE This value is automatically calculated if number of stages configured > 3.

D: 80%

hysterisis __. D: 20%

Low Sump Water Level:

Open makeup valve if switch is On for _:__ mm:ss. D: 0:05 mm:ss

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Maintenance

Navigation: i-Vu / Field Assistant: Properties > Control Program > Maintenance

Point Name/Description Default/Range

Unit

Source Water Pump 1 Status Pump 1's status. R: On/Off

Source Water Pump 2 Status Pump 2's status. R: On/Off

Source Water Pump 1 Amps The amps from pump 1. R: 0.1 to 10 A

Source Water Pump 2 Amps The amps from pump 2. R: 0.1 to 10 A

WSHP Loop Conditions Loop conditions are OK to run or Not OK to run, based on

condenser water flow and temperature status.

R: OK to run

Not OK

Outdoor Air Temperature

Outdoor Air Temperature Source The source of the OAT value.

States:

N/A No sensor value associated with this device

Local A physical sensor is wired and connected to the appropriate input channel

of this controller

Network A network sensor value provided to this controller

Linkage The sensor value from an active Linkage connection, such as Airside

Linkage.

Locked Value The controller's sensor input is manually locked to a specific value

R: N/A

Local

Network

Linkage

Locked Value

System Outdoor Air Temperature Allows the outdoor air temperature value to be

received when enabled.

-999.00F

N/A

Outdoor Air Temp Displays the outdoor air temperature value from your designated

source.

R: -56 to 245F

Outdoor Air Relative Humidity

OA Relative Humidity Source The source of the outdoor air relative humidity value.

States:

N/A - No sensor value associated with this device

Local - A physical sensor is wired and connected to the appropriate input channel of

this controller

Network - A network sensor value provided to this controller

Linkage - The sensor value from a linked device, obtained through air or water

linkage

Locked Value - The controllers sensor input is manually locked to a specific value

R: N/A

Local

Network

Linkage

Locked Value

System Outdoor Air RH Allows the OA relative humidity value to be received from

another Network device when enabled.

-999.00%rh

N/A

OA Relative Humidity The outdoor air relative humidity value used for control. R: 0 to 100%rh

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Point Name/Description Default/Range

Occupancy

Remote Contact Input The status of the physical Remote Contact BI point. R: Open/Closed

BAS On/Off Determines the controller's occupancy state and can be set over the

network by another device or third party BAS.

Options:

Inactive Occupancy is determined by a configured schedule

Occupied The controller is always in the occupied mode

Unoccupied The controller is always in the unoccupied mode

Inactive

Occupied

Unoccupied

System Occupancy The status of the System Occupancy network point. R: Inactive

Occupied

Unoccupied

Occupancy Contact The Remote Occupancy Contact input's current status. R: Inactive

Active Occupied

Schedules The controller's occupancy status based on the local schedule. R: Unoccupied/Occupied

Alarms

Navigation: i-Vu / Field Assistant: Properties > Control Program > Alarms

Point Name/Description Default/Range

Pump 1 in Hand Pump 1's status on, but the commanded state is off. R: Normal/Hand

Pump 1 Fail Pump 1's commanded state is on, but the status is off and has exceeded

the feedback delay timer.

R: Normal/Alarm

Pump 1 Runtime The status of Pump 1's runtime. R: Accumulating

Exceeds Limit

Pump 2 in Hand Pump 2's status is on, but the commanded state is off. R: Normal/Hand

Pump 2 Fail Pump 2's commanded state is on, but the status is off and has exceeded

the feedback delay timer.

R: Normal/Alarm

Pump 2 Runtime The status of Pump 2's runtime. R: Accumulating

Exceeds Limit

Pump 1 and 2 Failed Pump 1 and 2 have been locked out by exceeding the attempts

to start the pumps. You must manually reset them.

R: Normal/Alarm

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Point Name/Description Default/Range

Leaving Source Water Temp Sensor Status of the leaving source water temperature

sensor.

R: Normal/Alarm

High Source Water Temperature Source water temperature has exceeded the high

limit.

R: Normal/Alarm

Low Source Water Temperature Source water temperature has dropped below the

low limit.

R: Normal/Alarm

No Water Flow Indicates there is no water flow detected in the system. R: Normal/Alarm

High Differential Pressure Differential pressure has exceeded the high limit. R: Normal/Alarm

Low Differential Pressure Differential pressure has dropped below the low limit. R: Normal/Alarm

Outdoor Air Temp Sensor Indicates if the controller is receiving a valid outdoor air

temperature value.

R: Normal/Alarm

OA Relative Humidity Indicates if the controller is receiving a valid outdoor air relative

humidity value.

R: Normal/Alarm

Condenser Water Linkage Indicates if Condenser Water Linkage is not updated from

the Loop controller, after is a 5 minute alarm delay.

NOTE Reset this alarm by re-establishing Linkage and correcting the condition that

caused the Linkage failure, or by momentarily setting the Shutdown point to Active.

R: Normal/Alarm

SUMP_HI The status of the sump high water level switch. R: Normal/Alarm

SUMP_LO The status of the sump low water level switch. R: Normal/Alarm

Linkage

Navigation: i-Vu / Field Assistant: Properties > Control Program > Linkage

Point Name/Description Range

Linkage

Linkage Equip (Collector) Shows the linkage information that is being sent from the

WSHP to the Loop Controller.

D: Application Instance = 1

Number of Providers = 0

Condenser Water Linkage If Active, the controller is part of a linked system. If Not

Active, the controller is a stand-alone device.

R: Not Active/Active

Min Allowable Loop Temperature Used for setpoint optimization, the minimum

allowable loop temperature.

R: 0.0 to 999.0F

Max Allowable Loop Temperature Used for setpoint optimization, the maximum

allowable loop temperature.

R: 0.0 to 999.0F

Water Loop Temp The source water supply temperature of the loop. R: 0.0 to 999.0F

Loop Pump Status The actual state of the source water loop pump(s). R: Off/On

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Point Name/Description Range

Heat Pumps in Cool Mode The number of WSHP's that are currently calling for cooling

operation.

R: 0 to 999

Heat Pumps in Heat Mode The number of WSHP's that are currently calling for

heating operation.

R: 0 to 999

I/O Points

The values shown on the I/O Points Properties page are the raw values at the I/O objects and may not match values

shown on status displays that are affected by control program logic.

We strongly recommend that you leave these parameters at their defaults. I/O can only be used for the purpose designed

in the equipment control program. Modifying these parameters may result in unpredictable equipment control.

The following Point List table shows the point names, point types, object ID's, and Object names for every input and output

point. The default point addressing is designed to be used with the UC Open XP controller and UC Open XP IO expander.

Navigation: i-Vu / Field Assistant: Properties > I/O Points

Point List

Name Type Channel Input Type Object Name

OAT sensor BAI IN-3 Therm oatsens

Outdoor Air RH Sensor BAI IN-4 0-10 vdc oarh_sensor

Source Return Water Temp BAI IN-2 Therm srwt_sensor

Source Supply Water Temp BAI IN-1 Therm sswt_sensor

Source Water Diff. Pressure BAI IN-5 0-10 vdc src_diff_press

SW Pump 1 Amp Sensor BAI IN-6 0-10 vdc swp1_amp_sensor

SW Pump 1 Status BBI IN-6 Dry Contact sw_p1_status

SW Pump 2 Amp Sensor BAI IN-7 0-10 vdc swp2_amp_sensor

SW Pump 2 Status BBI IN-7 Dry Contact sw_p2_status

High Wtr Level BBI IN-10 Dry Contact high_sump_lvl

Low Wtr Level BBI IN-11 Dry Contact low_sump_lvl

Remote Contact Input BBI IN-8 Dry Contact rem_con

Source Water Flow BBI IN-9 Dry Contact sw_flow

Boiler Output 1 BAO AO-3 boiler_output1

Boiler Output 2 BAO AO-4 boiler_output2

Bypass Valve/Pump 2 VFD Output BAO AO-2 chw_bypass_valve_vfd

Pump 1 VFD Output BAO AO-1 pump1_vfd_output

Tower Output 1 BAO AO-5 tower_output1

Tower Output 2 BAO AO-6 tower_output2

Alarm BBO BO-4 alm

Boiler Output Stage 1 BBO EXP BO-1 m1128

Boiler Output Stage 2 BBO EXP BO-2 m1141

Boiler Output Stage 3 BBO EXP BO-3 m1142

Boiler Output Stage 4 BBO EXP BO-4 m1143

CW Pump1 S/S BBO BO-1 cw_pump1

CW Pump2 S/S BBO BO-2 cw_pump2

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Point List

Name Type Channel Input Type Object Name

Makeup Valve BBO BO-5 makeup

Tower Output Stage 1 BBO EXP BO-5 m1144

Tower Output Stage 2 BBO EXP BO-6 m1145

Tower Output Stage 3 BBO EXP BO-7 m1146

Tower Output Stage 4 BBO EXP BO-8 m1147

WSHP Comp Command BBO BO-3 wshp_ok

WARNINGS

Do not change the Value, Offset/Polarity, Exp:Num, I/O Type, Sensor/Actuator Type, Min/Max, or Resolution I/O

configuration parameter for the points listed below. Changing these parameters could cause improper control and/or

equipment damage.

Use extreme caution if locking a point as this may also cause improper control and/or equipment damage.

Point Name/Description

Source Supply Water Temp The value of the controller's leaving source supply water

temperature sensor input, prior to configuring Calibration Offset.

R: -56 to 245F

Source Return Water Temp The value of the controller's source return water

temperature sensor input, prior to configuring Calibration Offset.

R: -56 to 245F

OAT Sensor The value of the controller's outdoor air temperature sensor input, prior to

any operator-configured Calibration Offset.

R: -56 to 245F

Outdoor Air RH Sensor The value of the controller's outdoor air relative humidity sensor

input, prior to any operator-configured Calibration Offset.

R: 0 to 100%rh

Source Water Diff. Pressure The current reading of the controller's differential

pressure input.

R: 0 to 10 psi

SW Pump 1 Amp Sensor The current voltage of the controller's pump 1 amp input. R: 10 to 50 Amps

SW Pump 2 Amp Sensor The current voltage of the controller's pump 2 amp input. R: 0 to 5 Volt

SW Pump 1 Status The current state of pump 1's status input. R: Off/On

SW Pump 2 Status The current state of pump 2's status input. R: Off/On

Remote Contact Input The current state of the input connected to the remote contact

input.

R: Off/On

Source Water Flow The current state of the flow input. R: No Flow/Flow

High Wtr Level The current state of the high water level switch's status input. R: Off/On

Low Wtr Level The current state of the low water level switch's status input. R: Off/On

Pump 1 VFD Ouput The current commanded output to the pump 1 VFD. R: 0 to 100%

Bypass Valve / Pump 2 VFD Output The current commanded output to the bypass

valve or Pump 2 VFD.

R: 0 to 100%

Boiler Output 1 The current commanded output to the Boiler Output 1. R: 0 to 100%

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Boiler Output 2 The current commanded output to the Boiler Output 2. R: 0 to 100%

Tower Output 1 The current commanded output to the Tower Output 1. R: Off/On

Tower Output 2 The current commanded output to the Tower Output 2. R: Off/On

CW Pump1 S/S The current commanded output to start or stop pump 1. R: Off/On

CW Pump2 S/S The current commanded output to start or stop pump 2. R: Off/On

WSHP Comp Command The WSHP Compressor Command is enabled if the loop

controller is running and has flow.

R: Off/On

Alarm If an alarm is present in the loop controller, the alarm output is turned on. R: Normal/Alarm

Makeup Valve The current commanded output to the makeup valve. R: Off/On

Boiler Output Stage 1 The current commanded output to start or stop boiler output 1. R: Off/On

Boiler Output Stage 2 The current commanded output to start or stop boiler output 2. R: Off/On

Boiler Output Stage 3 The current commanded output to start or stop boiler output 3. R: Off/On

Boiler Output Stage 4 The current commanded output to start or stop boiler output 4. R: Off/On

Tower Output Stage 1 The current commanded output to start or stop tower output 1. R: Off/On

Tower Output Stage 2 The current commanded output to start or stop tower output 2. R: Off/On

Tower Output Stage 3 The current commanded output to start or stop tower output 3. R: Off/On

Tower Output Stage 4 The current commanded output to start or stop tower output 4. R: Off/On

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Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

NOTE Engineering units shown in this document in the defaults and ranges are strictly for reference. You must enter an integer only.

Navigation screens

Screen Names Display Details

Standby

Not an interactive screen. Touch anywhere to advance to

Home screen.

Screen displays after the Inactivity

Timer expires (default is 5 minutes).

Displays:

Source water supply temperature

Mode - Heating or Cooling

Occupancy

Home

Click on the right to navigate to Snapshot screen.

Displays:

Source water supply temperature

Mode - Heating or Cooling

Occupancy

Appendix C: Loop Control Points/Properties on the Equipment Touch

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Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

Screen Names Display Details

Snapshot

Back to the Home screen - click on the left

Forward to Loop Control Properties Menu screen - click

on the right

Navigates to:

Equipment alarm indicator

SWS Temp, SWR Temp, Bypass

Valve Status, Loop Diff Pressure,

Boiler Status, and Tower Status, if

applicable

Source pump status

OAT, if available and allowed

Alarms, if present

Navigates to:

Alarm status

Schedules

Trends

Loop Control

Properties

Navigates to Property pages

passwords:

User level - type user

Admin level - type admin

Factory level - type Touch

NOTE Only the buttons that are

authorized for a specific password

level are visible.

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Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

Screen Names Display Details

Show/Hide

Configuration

Configure Show/Hide conditions for

values on the following screens:

Standby

Home

Snapshot

NOTE Only displayed for the Factory

or Admin password. (See above.)

Startup Wizard

Navigation: Equipment Touch: Startup Wizard

Point Name/Description Range

Number Of Pumps The number of pumps in the system. D:

One

Two

Pump Status Type The type of status that the pumps deliver to the loop controller to

indicate they are on.

Switch

Amperage

Network

None

Pump 1 Control Pump control type for single pump system. D:

Constant Volume

Constant Vol w/Bypass

Single Vfd

Pump 2 Control Pump control type for two-pump system. D:

Constant Volume

Constant Vol w/Bypass

Single Vfd

Two VFDs

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Point Name/Description Range

Pump Staging If there are 2 pumps, this type of staging enables or disables the

pumps, based on Demand Only or Occ or Demand (set in Unit Configuration).

Lead/Standby - One pump runs as the lead pump and the other pump waits in

standby.

Lead/Lag One pump runs as the lead pump and, if the pressure is not maintained, brings the second pump on

as the lag pump. (Only available if Pump Control is set to Two VFDs)

Lead/Standby

Lead/Lag

Cooling Type The cooling tower /_fan control configuration. D:

Modulating

1 - Stage

2 - Stage

3 - Stage

4 - Stage

Heat Type The boiler output control configuration. D:

Modulating

1 - Stage

2 - Stage

3 - Stage

4 - Stage

Sump Level Control Enable or disable sump level control. D:

Disable

Disable/Enable

Remote Contact Unocc Logic State Sets the remote contact's normal logic state. D:

Open

Open/Closed

Flow Type Sets the Source Water Flow switch's flow type. When set to Normal, the flow

switch contact closes when water flow is detected.

Normal

Inverted

Outdoor Air Sensor Type The location of the source of the OAT input value. D:

Local OAT Sensor

None

Local OAT Sensor

Network OAT

Outdoor Air Temp Calibration A calibration offset value allows the outdoor air

temperature sensor to be adjusted to match a calibrated standard measuring the

temperature in the same location.

0.00

-9.9 to 10F

OA Relative Humidity Sensor Type - The location of the source of the Outdoor Air Relative

Humidity input value.

Local RH Sensor

None

Local OAT Sensor

Network OAT

Relative Humidity Calibration A calibration offset value allows the local relative

humidity sensor to be adjusted to match a calibrated standard measuring the space

relative humidity in the same location.

0%rh

-15 to 15%rh

Differential Pressure Sensor Type The location of the source of the differential

pressure input value.

Local DP Sensor

Network DP

Page 69

Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

Point Name/Description Range

Pump 1 Trip Point Determines when Pump 1 is on. D:

3.00 A

0 to 9999.00 A

Pump 2 Trip Point Determines when Pump 2 is on. D:

3.00 A

0 to 9999.00 A

Lockout If disabled, allows pumps to continue to cycle until either pump status is

attained. If enabled it will lockout out the pumps after they have failed 3 (default value)

consecutive times

Disabled

Disabled/Enabled

Lock out both pumps if both have failed "#" consecutive times. - Set the number of

pump failures.

1 to 5

Manually release lockout? If the pump lockout is enabled and the pumps are locked

out, you can manually release the lockout.

Off

Off/Running

Page 70

Source Water Loop Control for UC Open XP CARRIER CORPORATION 2021

Important changes to this document are listed below. Minor changes such as typographical or formatting errors are not

listed.

Date Topic Change description Code*

6/16/21 Specifications Reworded Rnet port specification and added power supplied by

Rnet port.

Reworded Protection specification and added first paragraph.

X-H-JS-O

1/25/19 Specifications Added surge CAUTION to Protection specification. X-TS-AK-E-CC

* For internal use only

Document revision history

Page 71

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