Carrier Aquazone 50PCV Integration Guide PDF

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Summary of Content for Carrier Aquazone 50PCV Integration Guide PDF

WSHP Open v3

Integration Guide

CARRIER CORPORATION 2021 Catalog No. 11-808-539-01 6/15/2021

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.

CARRIER CORPORATION 2021. All rights reserved throughout the world. i-Vu is a registered trademark of Carrier

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

Contents Introduction .................................................................................................................................................................. 1

What is the WSHP Open controller? .................................................................................................................. 1 Safety considerations & handling warning ....................................................................................................... 3

Wiring inputs and outputs ........................................................................................................................................... 4

Communications wiring .............................................................................................................................................. 6 Protocol overview .................................................................................................................................................. 6 BACnet MS/TP ...................................................................................................................................................... 7

To set up the WSHP Open for BACnet MS/TP ..................................................................................... 7 Adjusting BACnet MS/TP properties using an Equipment Touch ....................................................... 9 Troubleshooting BACnet MS/TP communication .............................................................................. 11

BACnet ARC156 ................................................................................................................................................. 11 To set up the WSHP Open for BACnet ARC156 ................................................................................. 11 Troubleshooting ARC156 communication ......................................................................................... 13

Modbus ................................................................................................................................................................ 13 To set up the WSHP Open for Modbus ............................................................................................... 13 Troubleshooting Modbus .................................................................................................................... 15

Johnson N2 ......................................................................................................................................................... 16 To set up the WSHP Open for N2 ....................................................................................................... 16 Troubleshooting N2 ............................................................................................................................. 17

LonWorks ............................................................................................................................................................ 18 To set up the WSHP Open for the LonWorks Option Card (Part #LON-OC) ...................................... 19 Commissioning the controller for LonWorks communication ........................................................... 20 Troubleshooting LonWorks ................................................................................................................. 20

Start-up ....................................................................................................................................................................... 22

Sequence of Operation ............................................................................................................................................. 23 Scheduling .......................................................................................................................................................... 23 Fire/Smoke detector input ............................................................................................................................... 24 Shutdown input .................................................................................................................................................. 24 Indoor fan ............................................................................................................................................................ 24 Cooling ................................................................................................................................................................. 25 Reverse cycle heating ....................................................................................................................................... 26 Auxiliary heat ...................................................................................................................................................... 27 Indoor air quality (IAQ) and demand control ventilation (DCV) .................................................................. 28 Dehumidification ............................................................................................................................................... 28 Waterside economizer ...................................................................................................................................... 29 Demand limiting ................................................................................................................................................ 30 Power failure restart delay ............................................................................................................................... 30 Alarms ................................................................................................................................................................. 30

Troubleshooting the WSHP Open ............................................................................................................................. 32 LED's .................................................................................................................................................................... 32

Compliance ................................................................................................................................................................ 34 FCC Compliance ................................................................................................................................................. 34 CE Compliance ................................................................................................................................................... 34 BACnet Compliance........................................................................................................................................... 34

Appendix A: Network Points List for WSHP Open .................................................................................................. 35 Third party access to BACnet points in a controller ..................................................................................... 35 Network points list for BACnet and Modbus ................................................................................................. 38 Network points list for N2 and LonWorks ...................................................................................................... 42

Appendix B: BACnet Protocol Implementation Conformance Statement ........................................................... 45

Appendix C: Modbus Protocol Implementation Conformance Statement........................................................... 46

Contents

Appendix D: Johnson N2 Protocol Implementation Conformance Statement .................................................... 48

Appendix E: LonWorks Protocol Implementation Conformance Statement ....................................................... 50

Document revision history ........................................................................................................................................ 51

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1

What is the WSHP Open controller?

The Water Source Heat Pump (WSHP) controller is available as an integrated component of a Carrier packaged

unit. Its internal application programming provides optimum performance and energy efficiency. WSHP Open

enables the unit to run in 100% stand-alone control mode or it can communicate to the Building Automation

System (BAS).

On board DIP switches allow you to select the baud rate and choose one of the following protocols:

BACnet MS/TP

BACnet ARC156

Modbus

Johnson N2

LonWorks

The Equipment Touch is a touchscreen device with a 4.3 in. color LCD display that you connect to the Rnet port of

one of the following controllers to view or change its property values, schedule equipment, view trends and

alarms, and more, without having to access the system's server.

You can use Carriers Equipment Touch user interface with the WSHP Open controller using the 5-pin J12 Access

Port. See illustration below.

The WSHP Open's application supports detailed color graphics, status, properties, alarms, trends, performance,

configuration, and Help on the Equipment Touch. In addition, the WSHP Open Startup Wizard has screens to

facilitate the installation technician to initially configure the WSHP Open.

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

Introduction

Introduction

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Introduction

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Safety considerations & handling warning

WARNING

When you handle the WSHP Open:

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 inputs and outputs

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WSHP Open Inputs and Outputs Table

Input/Output Type Part Numbers Type of I/O Connection Pin

Numbers

I/O Channel

Inputs

SPT Sensors

ZS sensors

Wireless Adapter for

wireless sensors

Equipment Touch

For detailed information, see:

Carrier Sensor Installation Guide

ZS Sensors Installation or

Application Guide

Wireless Sensors Installation or

Application Guide

Equipment Touch Installation and

Setup Guide

Communicating

J13, 1 - 4

Rnet Port

Space Relative Humidity 33ZSENSRH-02 AI (4-20 mA) J4 - 5 & 6 AI - 1

Indoor Air Quality 33ZCSPTCO2 AI (4-20 mA) J4 - 2 & 3 AI - 2

Condensate Switch N/A BI (Dry Contacts) J5 - 5 & 6 BI - 3

Stage 1 Compressor

Status

N/A BI (Dry Contacts) J1 - 10 BI - 5

Leaving Source Water

Temp

10K Type II AI (10K Thermistor) J2 - 1 & 2 AI - 6

Supply Air Temperature 33ZCSENSAT AI (10K Thermistor) J2 - 3 & 4 AI - 7

Supply Fan Status N/A BI (Dry Contacts) J5 - 1 & 2 BI - 8

Occupancy Contact N/A BI (Dry Contacts) J5 - 1 & 2 BI - 8

Smoke Detector Input** N/A 24 Vac J1 - 9 24 Vac IN

Outputs

Aux Heat - Modulating

(HW Valve/Water Econ)

N/A AO (0-10 Vdc/

2-10 mA)

* J2 - 4 & 5 AO - 1

Outside Air Damper N/A AO (0-10 Vdc/

2-10 mA)

* J22 - 1 & 2 AO - 2

Supply Fan On/

Low speed (3-speed only)

N/A BO Relay (24 Vac, 3A) * J1 - 4 BO - 1 (G)

W2-Aux Heat or 2-pos.

Water Economizer

N/A BO Relay (24 Vac, 3A) * J1 - 5 BO - 2

Reversing Valve (B or O) N/A BO Relay (24 Vac, 3A) * J1 - 6 BO - 3 (RV)

Y2-Compressor 2nd stage N/A BO Relay (24 Vac, 3A) J1 - 7 BO - 4 (Y2)

Y1-Compressor 1st stage N/A BO Relay (24 Vac, 3A) J1 - 8 BO - 5 (Y1)

Dehumidification Relay N/A BO Relay (24 Vac, 3A) * J11 - 7 & 8 (N.O.) BO - 6

Fan Speed Medium/Low

(3-speed Only)

N/A BO Relay (24 Vac, 3A) * J11 - 5 & 6 (N.O.) BO - 7

Fan Speed High/Low

(3-speed Only)

N/A BO Relay (24 Vac, 3A) * J11 - 2 & 3 (N.O.) BO - 8

Wiring inputs and outputs

Wiring inputs and outputs

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Input/Output Type Part Numbers Type of I/O Connection Pin

Numbers

I/O Channel

Legend:

AI - Analog Input AO - Analog Output

BI - Digital Input BO - Digital Output

* These outputs are configurable.

** 24 Vac required at this terminal to provide unit operation. Connect an isolated N.C. smoke detector contact (or jumper) between 24

Vac and J1 - 9.

Communications wiring

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Protocol overview

Protocols are the communication languages spoken by the control devices. The main purpose of a protocol is to

communicate information in the most efficient method possible. Different protocols exist to provide specific

information for different applications.

In the BAS, many different protocols might be used, depending on manufacturer. Different protocols do not

change the function of the controller, but they typically require the owner to change systems or components in

order to change from one protocol to another. communicates different types of protocols.

The WSHP Open can communicate 1 of 5 different protocols:

BACnet MS/TP (page 7)

BACnet ARC156 (page 11)

Modbus (page 13)

Johnson N2 (page 16)

LonWorks (page 18)

The default setting is BACnet MS/TP. You set the protocol and baud rate using the SW3 DIP switches. The rotary

switches MSB (SW1) and LSB (SW2) set the boards network address. See table below for specific switch settings.

The third party connects to the controller through port J19 for BACnet MS/TP, BACnet ARC156, Modbus, and N2,

and through J15 for the LonWorks Option Card.

NOTE You must cycle power after changing the rotary switches or after connecting the LonWorks Option Card to

J15.

SW3 DIP switch settings

Unused Comm

Option port

Protocol

Baud rate

8 7 6 5 4 3 2 1

BACnet MS/TP

(Default)

Master N/A Off Off Off On Off Select Baud Select Baud

BACnet ARC156 N/A Off Off Off Off Off N/A N/A

Modbus Slave N/A Off Off On On Off Select Baud Select Baud

N2 Slave N/A Off Off Off On On Off Off

Lonworks N/A On On Off On Off Off On

Communications wiring

Communications wiring

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Baud DIP switch settings

Baud Rate DIP switch 2 DIP switch 1

9,600 bps Off Off

19.2 kbps On Off

38.4 kbps Off On

76.8 kbps (Default) On On

BACnet MS/TP

To set up the WSHP Open for BACnet MS/TP

Refer to Appendix B (page 45) for the Protocol Implementation Conformance Statement, or download the latest

from BACnet International http://www.bacnetinternational.net/catalog/index.php?m=28.

NOTE This controller counts as a full load on the MS/TP bus.

1 Turn off the WSHP Open's power.

NOTE Changes made to the switches when the controller is on will not take effect until the power is cycled!

2 Using the rotary switches MSB (SW1) and LSB (SW2), set a unique BACnet MS/TP MAC address for the

WSHP Open. Set the MSB (SW1) switch to the tens digit of the address, and set the LSB (SW2) switch to the

ones digit. Valid addresses are 01-99.

NOTE The rotary switches also determine the BACnet device instance of the controller on the BACnet

network. The BACnet device instance is automatically generated based on the scheme 16101xx, where 16

is the BACnet vendor ID for Carrier Corporation, and xx equals the rotary switch address.

EXAMPLE To set the controllers MS/TP MAC address to 01, point the arrow on the MSB (SW1) switch to 0

and the arrow on the LSB (SW2) switch to 1. Internally, the BACnet device instance is automatically

generated as 1610101.

10's 1's

1

3

45

2

7 8

9

6

01

3

45

2

7 8

9

6

0 SW1 SW2MSB LSB

3 Set the SW3 DIP switches 1 and 2 for the appropriate communications speed (9600, 19.2k, 38.4k, or 76.8k

bps).

NOTE Use the same baud rate and communication settings for all controllers on the network segment. The

WSHP Open is fixed at 8 data bits, No Parity, and 1 Stop bit for this protocol's communications.

Communications wiring

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Baud DIP switch settings

Baud rate 2 1

9,600 bps Off Off

19.2 kbps On Off

38.4 kbps Off On

76.8 kbps On On

4 Set the remaining DIP switches as follows:

BACnet MS/TP DIP switch settings

8 7 6 5 4 3

Off Off Off Off On Off

The following example shows the DIP switches set for 76.8k (Carrier default), and BACnet MS/TP.

5 Connect the BACnet MS/TP network to the controller's J19 Network Comm port. Connect to Net+, Net-, and

SHLD.

Wire specifications

A dedicated 22 AWG shielded twisted pair wire (EIA 485)

Maximum wire length 2000 feet (610 meters) or 32 nodes

Devices should be daisy-chained and not star-wired

Attach the drain/shield wire to both ends of the network segment and through every controller

NOTE Use the same polarity throughout the network segment.

6 Turn on the WSHP Open's power.

Communications wiring

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Adjusting BACnet MS/TP properties using an Equipment Touch

You may need to adjust the following BACnet MS/TP protocol timing settings using the Equipment Touch.

Max Masters - defines the highest MS/TP Master MAC address on the MS/TP network.

For example, if there are 3 master nodes on an MS/TP network, and their MAC addresses are 1, 8, and 16, then

Max Masters would be set to 16 (since this is the highest MS/TP MAC address on the network).

This property optimizes MS/TP network communications by preventing token passes and poll for master

requests to non-existent Master nodes.

In the above example, MAC address 16 knows to pass the token back to MAC address 1, instead of counting up to

MAC address 127. Each MS/TP master node on the network must have their Max Masters set to this same value.

The default is 127.

Max Info Frames - defines the maximum number of responses that will be sent when the WSHP Open receives the

token. The default is 10 and should be ideal for the majority of applications. In cases where the WSHP Open is the

target of many requests, this number could be increased as high as 100 or 200.

NOTES

BACnet MS/TP networks can be comprised of both master and slave nodes. Valid MAC addresses for master

nodes are 0 127 and valid addresses for Slave nodes are 0 - 254.

If the third party attempts to communicate to the controller but does not get a response, make sure the

controller is set as a BACnet MS/TP (m) master. The BACnet software asks the controllers, Who Is? This is

to auto-locate devices on the network. Only controllers set as masters will answer this request.

See Appendix A for Network Points List.

See Appendix B (page 45) for the BACnet Protocol Implementation Conformance Statement (PICS).

To set the Device Instance number or adjust the Max Masters or Max Info Frames using an Equipment Touch

1 In the Equipment Touch interface, navigate to the Properties Menu screen and click Login.

NOTE The following graphic is generic and not specific to your system.

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2 Type Touch for the password and click Done.

3 On the Properties Menu screen, scroll to the bottom of the list and click ET System.

4 On the ET System screen, click Setup.

5 On the Setup screen, click Module Setup.

6 On the Module Setup screen, click Communication.

On the Communication screen, edit the fields as needed:

7 Click the property box next to BACnet Device Instance, type the new number, and click Done.

8 Click the property box next to Max Masters and/or Max Info Frames, type a new value (1-127), and click

Done.

9 Click Save.

Communications wiring

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Troubleshooting BACnet MS/TP communication

For detailed troubleshooting and a list of supported objects, get the controller's BACnet PICS from the Carrier

BACnet PICS website http://www.bacnetinternational.net/catalog/index.php?m=28. You must get your BACnet

Object list from the manufacturer.

The most common communication problems are the result of not properly following the configuration steps

outlined in this manual. Review all of the steps and use the following list to check your settings.

Verify accuracy of the following:

Hardware settings for BACnet MS/TP (8 Data bits, No Parity, and 1 Stop bit):

Baud rate DIP switches DS2 and DS1

BACnet MS/TP protocol DIP switches DS3 - DS6

Jumper set to EIA-485

Proper connection wiring

Unique rotary address switches 1 99. If controllers have duplicate addresses, network communication can

be lost.

Unique BACnet Device Instance numbers. Default is 16101XX, with the rotary address switches defining XX. If

controllers have duplicate device instance numbers, network communication can be lost.

NOTES

The controller recognizes physical changes (DIP switches, rotary switches, and jumpers) upon power up.

If RX LED is solid, then the terminations are incorrect.

If the network has greater than 32 devices or exceeds 2,000 feet, a Repeater should be installed.

If a controller begins or ends a network segment, a terminating resistor may be needed.

BACnet ARC156

To set up the WSHP Open for BACnet ARC156

The WSHP Opens latest supported function codes and capabilities are listed on the associated Protocol

Implementation Conformance Statement (PICS), Carrier BACnet PICS website

http://www.bacnetinternational.net/catalog/index.php?m=28.

1 Turn off the WSHP Open's power.

NOTE Changes made to the switches when the controller is on will not take effect until the power is cycled!

2 Using the rotary switches MSB (SW1) and LSB (SW2), set a unique BACnet MS/TP MAC address for the

WSHP Open. Set the MSB (SW1) switch to the tens digit of the address, and set the LSB (SW2) switch to the

ones digit. Valid addresses are 01-99.

Communications wiring

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NOTE The rotary switches also determine the BACnet device instance of the controller on the BACnet

network. The BACnet device instance is automatically generated based on the scheme 16101xx, where 16

is the BACnet vendor ID for Carrier Corporation, and xx equals the rotary switch address.

EXAMPLE To set the controllers MAC address to 01, point the arrow on the MSB (SW1) switch to 0 and the

arrow on the LSB (SW2) switch to 1. Internally, the BACnet device instance is automatically generated as

1610101.

10's 1's

1

3

45

2

7 8

9

6

01

3

45

2

7 8

9

6

0 SW1 SW2MSB LSB

3 Set the remaining DIP switches as follows:

BACnet ARC156 DIP switch settings

8 7 6 5 4 3

Off Off Off Off N/A N/A

The following example shows the DIP switches set for BACnet ARC156.

4 Connect the BACnet ARC156 network to the controller's J19 Network Comm port. Connect to Net+, Net-, and

SHLD.

Wire specifications

A dedicated 22 AWG shielded twisted pair wire (EIA 485)

Maximum wire length 2000 feet (610 meters) or 32 nodes

Devices should be daisy-chained and not star-wired

Attach the drain/shield wire to both ends of the network segment and through every controller

NOTE Use the same polarity throughout the network segment.

5 Turn on the WSHP Open's power.

Communications wiring

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Troubleshooting ARC156 communication

The most common communication problems result from not properly following the configuration steps outlined

above in this manual. Review all of the steps and use the following list to check your settings.

Verify accuracy of the following:

Protocol DIP switches DS3 - DS6

Proper connection wiring

Unique rotary address switches 1 99. If controllers have duplicate addresses, network communication can

be lost.

Unique BACnet Device Instance numbers. Default is 16101XX, with the rotary address switches defining XX. If

controllers have duplicate device instance numbers, network communication can be lost.

NOTES

The controller recognizes physical changes (DIP switches, rotary switches, and jumpers) upon power up.

If RX LED is solid, then the terminations are incorrect.

If the network has greater than 32 devices or exceeds 2,000 feet, a Repeater should be installed.

If a controller begins or ends a network segment, a terminating resistor may be needed.

Software settings defined through the Equipment Touch device. To confirm settings, obtain a Modstat of the

device. On the Equipment Touch, click the link to the Modstat.

Modbus

To set up the WSHP Open for Modbus

Refer to Appendix C (page 46) for the Modbus Protocol Implementation Conformance Statement (PICS).

1 Turn off the WSHP Open's power.

NOTE Changes made to the switches when the controller is on will not take effect until the power is cycled!

2 Using the rotary switches, set a unique Modbus slave address for the WSHP Open. Set the MSB (SW1) switch

to the tens digit of the address, and set the LSB (SW2) switch to the ones digit. Valid Modbus slave

addresses are 01-99.

EXAMPLE To set the controller's Modbus slave address to 01, point the arrow on the MSB (SW1) switch to 0

and the arrow on the LSB (SW2) switch to 1.

10's 1's

1

3

45

2

7 8

9

6

01

3

45

2

7 8

9

6

0 SW1 SW2MSB LSB

Communications wiring

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3 Set the SW3 DIP switches 1 and 2 for the appropriate communications speed (9600, 19.2k, 38.4k, or 76.8k

bps).

NOTE Use the same baud rate and communication settings for all controllers on the network segment. The

WSHP Open is fixed at 8 data bits, No Parity, and 1 Stop bit for this protocol's communications.

Baud DIP switch settings

Baud rate 2 1

9,600 bps Off Off

19.2 kbps On Off

38.4 kbps Off On

76.8 kbps On On

4 Set the remaining DIP switches as follows:

Modbus DIP switch settings

8 7 6 5 4 3

Off Off Off On On Off

The following example shows the DIP switches set for 9600 baud and Modbus.

5 Connect the Modbus EIA-485 network to the WSHP Open's J19 Network Comm port. Connect to Net+, Net-,

and SHLD.

Wire specifications

A dedicated 22 AWG shielded twisted pair wire (EIA 485)

Maximum wire length 2000 feet (610 meters) or 32 nodes

Devices should be daisy-chained and not star-wired

Attach the drain/shield wire to both ends of the network segment and through every controller

NOTE Use the same polarity throughout the network segment.

6 Turn on the WSHP Open's power.

Communications wiring

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Troubleshooting Modbus

Check the following to troubleshoot your WSHP Open:

1 Verify that the BAS and controller are both set to speak the Modbus RTU protocol on the Comm Selector DIP

switches DS3 - DS6.

2 The BAS and the controller are both set for the same baud rate:

Baud rate DIP switches DS2 and DS1

Obtain a Modstat of the controller. Scroll to the bottom of the page to Network Communications to view

the active protocol and baud rate.

3 The BAS is configured to speak 2-wire EIA-485 to the controller. The BAS may have to configure jumper or DIP

switches on their end.

4 The BAS and the controller have the same communication settings (8 data bits, No Parity, and 1 stop bit).

Proper connection wiring between the BAS and the controller.

1 Verify that the rotary address switches are set for the controller's unique slave address.

2 BAS must be reading or writing to the proper point addresses on the controller.

3 BAS is sending requests to the proper slave address of the controller.

NOTE Refer to Appendix C (page 46) for the Protocol Implementation Conformance Statement.

Modbus Exception Codes that might be returned from this controller

Codes Name Description

01 Illegal Function The Modbus function code used in the query is not

supported by the controller.

02 Illegal Data

Address

The register address used in the query is not supported

by the controller.

04 Slave Device

Failure

The Modbus Master has attempted to write to a non-

existent register or a read-only register in the

controller.

Communications wiring

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Johnson N2

To set up the WSHP Open for N2

Refer to Appendix D (page 48) for the N2 Protocol Implementation Conformance Statement (PICS).

1 Turn off the WSHP Open's power.

NOTE Changes made to the switches when the controller is on will not take effect until the power is cycled!

2 Using the rotary switches, set a unique N2 slave address for the WSHP Open. Set the MSB (SW1) switch to

the tens digit of the address, and set the LSB (SW2) switch to the ones digit. Valid N2 slave addresses are

01-99.

EXAMPLE To set the N2 slave address to 01, point the arrow on the MSB (SW1) switch to 0 and the arrow on

the LSB (SW1) switch to 1.

10's 1's

1

3

45

2

7 8

9

6

01

3

45

2

7 8

9

6

0 SW1 SW2MSB LSB

3 Set the DIP switches 1 and 2 for 9600 bps baud.

NOTE Use the same baud rate and communication settings for all controllers on the network segment. The

WSHP Open is fixed at 9600 bps baud, 8 data bits, No Parity, and 1 Stop bit.

4 Set the remaining DIP switches as follows:

N2 DIP switch settings

8 7 6 5 4 3 2 1

Off Off Off Off On On On On

The following example shows the DIP switches set for 9600 baud and N2.

Communications wiring

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5 Connect the N2 EIA-485 network to the controller's J19 Network Comm port. Connect to Net+, Net-, and

SHLD.

Wire specifications

A dedicated 22 AWG shielded twisted pair wire (EIA 485)

Maximum wire length 2000 feet (610 meters) or 32 nodes

Devices should be daisy-chained and not star-wired

Attach the drain/shield wire to both ends of the network segment and through every controller

NOTE Use the same polarity throughout the network segment.

6 Turn on the WSHP Open's power.

Troubleshooting N2

Check the following to troubleshoot your WSHP Open:

1 Verify that the BAS and controller are both set to speak N2 protocol on the Comm Selector DIP switches DS3 -

DS6.

2 The BAS and the controller are both set for the same baud rate:

9600 for N2

Baud rate DIP switches DS2 and DS1

Obtain a Modstat of the controller. Scroll to the bottom of the page to Network Communications to view

the active protocol and baud rate.

3 The BAS is configured to speak 2-wire EIA-485 to the controller. The BAS may have to configure jumper or DIP

switches on their end.

4 The BAS and the controller have the same communication settings (8 data bits, No Parity, and 1 stop bit).

Proper connection wiring between the BAS and the controller.

1 Verify that the rotary address switches are set for the controller's unique slave address.

2 BAS must be reading or writing to the proper point addresses on the controller.

3 BAS is sending requests to the proper slave address of the controller.

NOTES

Refer to Appendix A (page 35) for the Network Points list.

Refer to Appendix D (page 48) for the Protocol Implementation Conformance Statement.

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LonWorks

WARNING

When you handle the LonWorks Option Card:

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.

Refer to Appendix E (page 50) for the LonWorks Protocol Implementation Conformance Statement (PICS).

Communications wiring

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To set up the WSHP Open for the LonWorks Option Card (Part #LON-OC)

1 Turn off the WSHP Open's power.

NOTES

Changes made to the switches when the controller is on will not take effect until the power has been

cycled!

The controllers rotary address switches are not used when the LON-OC is installed. Thats because each

LON-OC has a 48-bit Neuron ID that makes it unique on the LonWorks network.

2 Set the SW3 DIP switches for LonWorks as follows:

8 7 6 5 4 3 2 1

Off On On Off On Off Off On

3 Plug the LonWorks Option Card's ribbon cable into Comm Option port J15 on the controller. See illustration

below.

CAUTION! The controller must be OFF before being connected.

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4 Connect the LonWorks network to the LonWorks Option Card's 2-pin Net port.

NOTE The 2-pin Net port provides TP/FT-10 channel compatibility. The TP/FT-10 or "Free Topology" network

type is polarity insensitive. Use 24 to 16 AWG twisted pair wire.

5 Turn on the WSHP Open's power.

6 Commission the controller for LonWorks communication. See instructions below.

Commissioning the controller for LonWorks communication

Before a device can communicate on a LonWorks network, it must be commissioned. Commissioning allows the

system integrator to associate the device hardware with the LonWorks systems network layout diagram. This is

done using the devices unique Neuron ID.

A network management tool such as Echelons LonMaker is used to commission each device, as well as, to assign

addressing. Specific instructions regarding the commissioning of LonWorks devices should be obtained from

documentation supplied with the LonWorks Network Management Tool.

When a new device is first commissioned onto the LonWorks network, the system integrator must upload the

devices External Interface File (XIF) information. LonWorks uses the XIF to determine the points (network

variables) that are available from a device. The WSHP Open has a set of predefined network variables. These

variables can be bound or accessed by the Network Management Tool.

The Browse feature of the Network Management Tool allows you to read real-time values from the WSHP Open.

The Network Management Tool allows you to test integration prior to binding the controller's network variables to

other LonWorks nodes.

Troubleshooting LonWorks

Check the following to troubleshoot your WSHP Open:

1 Verify that the BAS and controller are both set to speak the LonWorks protocol by theComm Selector DIP

switches DS3 - DS6.

2 The BAS and the controller are both set for the same baud rate:

38.4k for LonWorks

Baud rate DIP switches DS2 and DS1

Obtain a Modstat of the controller. Scroll to the bottom of the page to Network Communications to view

the active protocol and baud rate.

3 BAS must be reading or writing to the proper point addresses on the controller.

4 Verify that the Comm Option Port is enabled on the controller. The Comm Option Port setting must be set via

SW3 (switch DS7). It should be in the ON position to enable LonWorks communication.

5 Verify that controller has been properly commissioned onto the LonWorks network. See Commissioning the

controller for LonWorks communication (page 20).

Communications wiring

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6 Use the Browse feature of the network management tool to verify that you can communicate and get real-

time values from the controller before connecting the BAS.

7 Once you have confirmed communications with the controller using the network management tool, connect

the BAS.

8 Verify that the BAS is connected properly to the LonWorks Option Card's 2-wire TP/FT-10 Net port, which is

polarity insensitive. The BAS may have to configure jumper or DIP switches on their end to support TP/FT-10.

Start-up

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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.

Start-up

Sequence of Operation

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The multi-protocol WSHP Open controls mechanical cooling, heating, and waterside economizer outputs, based on

its own space temperature input and setpoints. An optional CO2 IAQ (Indoor Air Quality) sensor that is mounted in

the space maximizes the occupant's comfort. The WSHP Open has its own hardware clock that is automatically set

when you download the heat pump software to the board.

See Scheduling (page 23) for occupancy types.

The following sections describe the multi-protocol controller's functions. All point objects mentioned in this

sequence of operation reference the touchscreen interface. Points in Field Assistant and the i-Vu application are

the same or similar.

Scheduling

Scheduling - You must configure time periods to schedule the transitions from occupied to unoccupied operation.

The time periods control the space temperature to occupied heating and cooling setpoints. The WSHP Open

operates continuously in the Occupied mode until you configure either a time schedule or a third party control

system Enables/Disables the BAS On/Off point. You must set your local time and date for these functions to

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 either the

Equipment Touch, Field Assistant, the i-Vu application, or a third party Enables/Disables the BAS On/Off point.

You can disable this by going to Configuration > Unit Configuration > Occupancy Schedules, 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.

Schedule_Schedule - The unit operates according to the schedule configured and stored in the unit. The schedule

is accessible via the Equipment Touch, the i-Vu application, or Field Assistant. 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.

CAUTION Scheduling can only be controlled from one source.

Occupancy Input Contact (Option) - If configured for remote occupancy control (default), the WSHP Open can use

an external dry contact closure to determine the occupancy status of the unit. You must disable the Occupancy

Schedules in order to use the occupancy contact input. The unit enters an occupied mode when it senses the

abnormal input. After the input returns to its normal state, the unit stays in the occupied mode for the configured

Occ Override Delay period (15 minutes default).

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 system can control the unit through a network

communication and the BAS scheduling function.

Global Occupancy Scheduling - The WSHP Open can read the occupancy status from another unit so that a group

of WSHP's can be controlled from a single occupancy schedule. The local Occupancy Schedules must be disabled

in order to use the global occupancy input.

BACnet Network Occupancy Input - The WSHP Open can accept an external BACnet Binary Network Input for

occupancy control. This function is only compatible with units used in BACnet systems. You need to configure the

System Occupancy BACnet network input point to locate the device and point name where the external occupancy

point information resides. You must also disable Occupancy Schedules in order to use this input.

Sequence of Operation

Sequence of Operation

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Fire/Smoke detector input

The WSHP Open can read the status of a normally closed FSD contact input to determine if a fire or smoke

detector alarm is present. If the controller determines an alarm condition is present, all heating, cooling, and the

fan are disabled. The switch is factory-set to Normally Closed and cannot be changed.

Shutdown input

The WSHP Open controller has a shutdown input (software point) which, when set to its Active mode causes the

WSHP to safely shutdown in a controlled fashion. Heating and cooling is disabled after any minimum runtime

conditions expire and the fan is disabled after the fan-off timer expires. All alarms are reset but any active alarm

remains active. After the shutdown input transitions from Active mode to Inactive, the WSHP Open restarts after

the configured power fail restart delay expires.

Indoor fan

You can configure the indoor fan to operate in any one of 3 Fan Modes:

Auto - intermittent operation during both occupied and unoccupied periods

Continuous (default) - intermittent operation during unoccupied periods and continuous during occupied

periods

Always on - operates the fan continuously during both occupied and unoccupied periods

In the Continuous default mode, the fan is turned on when any one of the following is true:

It is in occupied mode, which is determined by the occupancy status

There is a demand for cooling or heating in the unoccupied mode

There is a call for dehumidification (optional)

When power is reapplied after a power outage, there is a configurable delay of 5 - 600 seconds (default 60)

before starting the fan. You must configure the fan delay:

The Fan On Delay defines the delay time (0 - 30 seconds, default 10) before the fan begins to operate after

heating or cooling is started.

The Fan Off Delay defines the delay time (0 - 180 seconds, default 45) the fan continues to operate after

heating or cooling is stopped.

NOTE The fan continues to run as long as the compressors, heating stages, or the dehumidification relays are on.

If the SPT failure alarm, ZS Sensor failure alarm, or condensate overflow alarm is active, the fan is shutdown

immediately, regardless of occupancy state or demand.

Sequence of Operation

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Automatic Fan Speed Control - The WSHP Open can control up to 3 fan speeds using the ECM (Electronically

Commutated Motor). The motor operates at the lowest speed possible to provide quiet and efficient fan operation

with the best latent capability. The motor increases speed if additional cooling or heating is required to reach the

desired space temperature setpoint. The control increases the motors speed as the space temperature rises

above the cooling or below the heating setpoint. The amount of space temperature increase above or below the

setpoint required to increase the fan speed is configurable in the setpoint. Also, the control increases the fan

speed as the Supply Air Temperature approaches the configured minimum or maximum limits.

Fan Speed Control

During heating When heat is required and active, the control continuously monitors the supply air

temperature to verify it does not rise above the configured Maximum Heating SAT Limit (110F default). As

the SAT approaches this value, the control increases the fan speed as required to ensure the SAT remains

within the limit. This provides the most quiet and efficient operation by running the fan at the lowest speed

possible.

During cooling When mechanical cooling is required and active, the control continuously monitors the

supply air temperature to verify it does not fall below the configured Minimum Cooling SAT Limit (50F

default). As the SAT approaches this value, the control increases the fan speed as required to ensure the SAT

will remain within the limit. Fan operates at the lowest speed during dehumidification to maximize latent

capacity during cooling.

Fan Status - You can configure an optional input as either an occupancy input contact or a fan status input. If

configured as fan status, the controller compares the status of the fan to the desired commanded state. When the

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

status is not on, then a fan status alarm is generated after 1 minute and the equipments compressor(s) and

auxiliary heat is disabled and the optional OA damper closes.

Cooling

The WSHP Open operates 1 or 2 stages of compression to maintain the desired cooling setpoint. The compressor

outputs are controlled by the PI (Proportional-integral) cooling loop and cooling stages capacity algorithm. The

algorithm calculates the desired number of stages needed to satisfy the space by comparing the space

temperature (SPT or ZS) to the appropriate cooling setpoint.

NOTE The waterside economizer, if applicable, is used for 1st stage cooling, in addition to the compressor(s).

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

Cooling is set to Enable

The Fire/Smoke Input and Shutdown modes are inactive

Heat mode is not active and the compressor time guard(s) have expired

Condensate Overflow input in Normal

Fan Status is True (if option is enabled)

If occupied, the SPT or ZS is greater than the occupied cooling setpoint

Space temperature reading is valid

If unoccupied, the SPT or ZS is greater then the unoccupied cooling setpoint

If economizer cooling is available and active, and the economizer alone is insufficient to provide enough

cooling

OAT > Cooling Lockout Temperature if OAT is available

Source Water Pump is on (if Source Water Linkage is active)

Sequence of Operation

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If all of the above conditions are met, the compressors' relays are energized as required. Otherwise, they will be

de-energized. If cooling is active and if the SAT approaches the minimum SAT limit, the fan will be indexed to the

next higher speed. If this is insufficient, and if the SAT falls further (equal to the minimum SAT limit), the fan will be

indexed to the maximum speed. If the SAT still continues to falls 5F below the minimum SAT limit, all cooling

stages will be disabled.

During Cooling, the reversing valve output is held in the cooling position (either B or O type, as configured), even

after the compressor is stopped. The valve does not switch position until the heating mode is required.

The configuration screens contain the Min SAT parameter as well as Cooling Lockout based on outdoor air

temperature (OAT). Both can be adjusted to meet various specifications.

There is a 5-minute off-time for the compressor, as well as a 5-minute time delay, when staging up to allow the

SAT to achieve a stable temperature, before energizing a second stage of capacity. Likewise, there is a 45 second

delay when staging down.

After a compressor is staged off, it may be restarted again after a normal time-guard period of 5 minutes and if

the supply air temperature has increased above the minimum supply air temperature limit.

The WSHP Open provides a status input to monitor the compressor operation. The status is monitored to

determine if the compressor status matches the commanded state. This input is used to determine if a refrigerant

safety switch or other safety device has tripped and caused the compressor to stop operating normally. If this

occurs, an alarm is generated to indicate the faulted compressor condition.

Reverse cycle heating

The WSHP Open operates 1 or 2 stages of compression to maintain the desired cooling setpoint. The compressor

outputs are controlled by the heating PI (Proportional-integral) loop and heating stages capacity algorithm. The

algorithm calculates the desired number of stages needed to satisfy the space by comparing the space

temperature (SPT or ZS) to the appropriate heating setpoint.

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

Heating is set to Enable

The Fire/Smoke Input and Shutdown modes are inactive

Cool mode is not active and the compressor time guard has expired

Condensate Overflow input in Normal

Fan Status is True (if option is enabled)

If occupied, the SPT or ZS is less than the occupied heating setpoint

Space Temperature reading is valid

If unoccupied, the SPT or ZS is less then the unoccupied heating setpoint

OAT > Heating Lockout Temperature if OAT is available

Source Water Pump is on (if Source Water Linkage active)

If all the above conditions are met, the heating outputs are energized as required, otherwise they are de-

energized. If the heating is active and the SAT approaches the maximum SAT limit, the fan is indexed to the next

higher speed. If this is insufficient, and if the SAT rises further and reaches the Maximum Heating SAT limit, the

fan is indexed to the maximum speed. If the SAT still continues to rise 5 F above the maximum limit, all heating

stages are disabled.

Sequence of Operation

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During Heating, the reversing valve output is held in the heating position (either B or O-type, as configured), even

after the compressor is stopped. The valve does not switch position until the cooling mode is required.

The configuration screens contain the Max SAT parameter as well as heating lockout based on outdoor air

temperature (OAT). Both can be adjusted to meet various specifications.

There is a 5-minute off-time for the compressor, as well as a 5-minute time delay, when staging up to allow the

SAT to achieve a stable temperature before energizing a second stage of capacity. Likewise, a 45 second delay is

used when staging down.

After a compressor is staged off, it may be restarted again after a normal time-guard period of 5 minutes and if

the supply air temperature has fallen below the maximum supply air temperature limit.

The WSHP Open provides a status input to monitor the compressor operation. The status is monitored to

determine if the compressor status matches the commanded state. This input is used to determine if a refrigerant

safety switch or other safety device has tripped and caused the compressor to stop operating normally. If this

occurs, an alarm is generated to indicate the faulted compressor condition. Also, if auxiliary heat is available (see

below), the auxiliary heat replaces the reverse cycle heating and maintains the space temperature as required.

Auxiliary heat

The WSHP Open can control a 2-position, or modulating water, or steam valve, connected to a coil on the

discharge side of the unit and supplied by a boiler, or a single stage ducted electric heater, in order to maintain

the desired heating setpoint. If Aux Heat Control is configured for Boilerless control operation, the aux heat only

operates if a compressor failure occurs or the source water temperature is insufficient for reverse cycle heating. If

Aux Heat Control is configured for Auxiliary Heat, in addition to the above, it also operates to supplement the heat

provided by the compressor, if the space temperature falls more than 1F below the desired heating setpoint.

(This amount is configurable.) The heat is controlled so the SAT does not exceed the Maximum Heating SAT limit.

The same conditions required for Reverse Cycle Heating must be true in order for the Auxiliary Heat algorithm to

run.

Auxiliary Modulating Hot Water / Steam Heating Reheat - The control can modulate a hot water or steam valve

connected to a coil on the discharge side of the unit, and supplied by a boiler in order to maintain the desired

heating setpoint, if the compressor capacity is insufficient, or a compressor failure occurs. Unless a compressor

fault condition exists, the valve only operates to supplement the heat provided by the compressor if the space

temperature falls more than 1F below the desired heating setpoint. The valve is controlled so the SAT does not

exceed the Maximum Heating SAT limit.

2- Position Hot Water / Steam Heating Reheat - The control can operate a 2-position, NO or NC, hot water or

steam valve, connected to a coil on the discharge side of the unit and supplied by a boiler, in order to maintain the

desired heating setpoint, if the compressor capacity is insufficient or a compressor failure occurs. Unless a

compressor fault condition exists, the valve only opens to supplement the heat provided by the compressor, if the

space temperature falls more than 1F below the desired heating setpoint. The valve is controlled so the SAT

does not exceed the Maximum Heating SAT limit and is subject to a 2 minute minimum OFF-time to prevent

excessive valve cycling.

Single Stage Electric Auxiliary Heat The control can operate a field-installed single stage of electric heat that is

installed on the discharge side of the unit, in order to maintain the desired heating setpoint, if the compressor

capacity is insufficient or a compressor failure occurs. Unless a compressor fault condition exists, the heat stage

only operates to supplement the heat provided by the compressor if the space temperature falls more than 1F

below the desired heating setpoint. The heat stage is controlled so the SAT does not exceed the Maximum

Heating SAT limit and is subject to a 2-minute minimum OFF-time to prevent excessive cycling.

Sequence of Operation

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Indoor air quality (IAQ) and demand control ventilation (DCV)

If the optional hardwired indoor air quality sensor is installed, ZS CO2 (IAQ), or the System Space AQ network input

point is used, the WSHP Open maintains indoor air quality with a modulating OA damper, which provides demand-

controlled ventilation. The control operates the modulating OA damper during occupied periods, monitors the CO2

level, compares it to the configured setpoints, and adjusts the ventilation rate, as required. The control provides

proportional ventilation to meet the requirements of ASHRAE specifications by providing a base ventilation rate

and then increasing the rate as the CO2 level increases. The control proportionally increases ventilation when the

CO2 level rises above the start ventilation setpoint and reaches the full ventilation rate when the CO2 level is at or

above the maximum setpoint. You can configure a minimum damper position to ensure that proper base

ventilation is delivered when occupants are not present. Access the IAQ configurations through the Configuration

screen.

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

Damper Control is configured for DCV

The Fire/Smoke Input and Shutdown modes are inactive

Fan Status is True (if option is enabled)

The unit is in an occupied mode

IAQ sensor reading is greater than the DCV Start CTRL Setpoint

The control has the following 4 adjustable setpoints:

DCV Start Ctrl Setpoint

DCV Max Ctrl Setpoint

Minimum Dmpr Pos

DCV Max Vent Damper Pos

NOTE In order for the damper to maintain proper base ventilation, you must configure the fan as Continuous or

Always On.

2-position OA Damper - You can configure the control to operate as a ventilation damper in a 2-position

ventilation mode to provide the minimum ventilation requirements during occupied periods.

Dehumidification

The WSHP Open provides occupied and unoccupied dehumidification only on units that are equipped with the

reheat option. This function requires an accessory hardwired space relative humidity sensor. When using a

relative humidity sensor to control dehumidification during occupied or unoccupied times, the dehumidification

setpoints are used accordingly. Also, you may use a ZS Humidity Sensor or a network input point System Space

RH in place of the hardwired RH sensor.

When the indoor relative humidity becomes greater than the dehumidification setpoint, a dehumidification

demand is acknowledged. Once acknowledged, the dehumidification output is energized, bringing on the supply

fan (medium speed), mechanical cooling, and the integral reheat coil. The controls engage cooling mode and the

waste heat from the compressor cooling cycle is returned to the reheat coil simultaneously, meaning that the

reversing valve causes the compressor to operate in the cooling mode.

NOTE During cooling mode, the unit cools and dehumidifies, and disables the reheat coil. However, once the call

for cooling has been satisfied and there is still a call for dehumidification, the unit continues to operate in the

reheat mode.

Sequence of Operation

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Waterside economizer

The WSHP Open can provide modulating, or 2-position water economizer operation (for a field-installed

economizer coil mounted to the entering return air side of the unit and connected to the source water loop), in

order to provide free cooling or preheating, when water conditions are optimal. Water economizer settings can be

accessed on Properties > Equipment > Status.

The following conditions must be true for economizer operation:

SAT reading is available

EWT reading is available

If occupied, the ZS is greater than the occupied cooling setpoint or less than the occupied heating setpoint

and the sourcer water is suitable

Space temperature reading is valid

If unoccupied, the ZS is greater than the unoccupied cooling setpoint, or less than the unoccupied heating

setpoint, and the source water is suitable

Modulating water/2-Position water economizer control - modulates a water valve to control source water flowing

through a coil on the entering air side of the unit

Cooling - Provides an economizer cooling function by using the water loop when the entering water loop

temperature is at least 5F below space temperature. If the water loop conditions are suitable, the valve

modulates open to maintain a Supply Air Temperature that meets the load conditions. If the economizer coil

capacity alone is insufficient for a period greater than 5 minutes, or if a high humidity condition occurs, then

the compressor starts, in order to satisfy the load. If the SAT approaches the Minimum Cooling SAT limit

(HOME > CONFIG > UNIT), the economizer valve modulates closed during compressor operation.

Heating - In addition, the control modulates the water valve if the entering source water loop temperature is

suitable for heating (at least 5F above space temperature) and heat is required. The valve is controlled in a

similar manner, except to satisfy the heating requirement. If the coil capacity alone is insufficient to satisfy

the space load conditions for more than 5 minutes, then the compressor starts in order to satisfy the load. If

the SAT approaches the Maximum Heating SAT limit, the economizer valve modulates closed during

compressor operation.

2-position water economizer control - has the capability to control a NO or NC, 2-position water valve to control

source water flow through a coil on the entering air side of the unit.

Cooling - The purpose is to provide a cooling economizer function directly from the source water loop when

the entering water loop temperature is at least 5F below space temperature. If the optional coil is provided

and the water loop conditions are suitable, then the valve opens to provide cooling to the space, when

required. If the capacity is insufficient for a period greater than 5 minutes, or if a high humidity condition

occurs, the compressor is started in order to satisfy the load. If the SAT reaches the Minimum Cooling SAT

limit, the economizer valve closes during compressor operation.

Heating - In addition, the economizer control opens the water valve, if the entering water loop temperature is

suitable for heating (at least 5F above space temperature) and heat is required. The valve is controlled in a

similar manner, except to satisfy the heating requirement. If the coil capacity is insufficient to satisfy the

space load for more than 5 minutes, then the compressor is started to satisfy the load. If the SAT reaches the

Maximum Heating SAT limit, the economizer valve closes during compressor operation.

Sequence of Operation

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Demand limiting

The WSHP Open can accept 3 levels of demand limit from the BACnet network. In response to a demand limit, the

unit decreases its heating setpoint and increases its cooling setpoint to widen the range, in order to immediately

lower the electrical demand. You can configure the temperature adjustment for both heating and cooling and for

each demand level. You can also set the response to a particular demand level to 0.

Power failure restart delay

The control provides a delay when recovering from a power failure, a shutdown mode, or when transitioning from

unoccupied to occupied mode, in order to prevent excessive demand when many units start simultaneously. Each

unit can be configured for a unique delay between 0 and 600 seconds. The factory-programmed default delay is

60 seconds.

Alarms

Fire/Smoke Detector Alarm The control monitors the voltage input to J1-9 to detect if a smoke detector or fire

detector NC contact has opened, indicating an alarm condition. The control verifies the presence of 24 Vac on this

input. If the input opens at any time, an alarm is generated after 3 seconds and the equipment (fan, compressor,

aux heat, and damper) immediately shuts down.

Space Temperature Alarms The control provides the ability to generate an alarm when the space temperature

exceeds the alarm setpoint. A separate occupied hysteresis and fixed unoccupied high and low alarm setpoints

are provided. The control provides a 5-minute alarm delay during unoccupied periods. During occupied periods,

the control uses the occupied temperature setpoint and applies the hysteresis value to determine the alarm

setpoints. When occupancy transitions from unoccupied to occupied or the occupied temperature setpoints are

changed, causing an alarm condition to occur, the control automatically calculates an alarm delay (equivalent to

the configured delay time in minutes/ F, multiplied by the temperature error, + 15 minutes). This prevents

nuisance alarms when an occupancy change occurs and allows time for the unit to correct an alarming

temperature condition.

Source Water Temperature Alarm The control has 4 configurable alarm limits for source water temperature.

The control verifies that the water temperature is within operating range (between high and low limits) for the

specific operating mode (heating or cooling) before energizing the compressor. Once the compressor is started,

the source water temperature is further monitored to verify that it is within limits to insure sufficient water is

flowing through the coil. If the leaving water temperature rises above or falls below the appropriate limits, and

lasts for more than 15 seconds, an alarm is generated and the compressor shuts down.

Supply Air Temperature Alarm The control has 2 configurable alarm limits for supply air temperature. The

control verifies that the supply air temperature is within operating range (between high and low limits) when the

compressor or auxiliary heat is operating. If the air temperature rises above or falls below the appropriate limits,

and this lasts for more than 5 minutes, an alarm is generated.

High Condensate/Overflow Alarm The control monitors a discrete input to determine the state of a condensate

level switch. You can configure the input to alarm on either an open or closed switch condition. If this input is in an

alarm state, the control starts a timer, and after the timer exceeds a configurable Condensate Overflow Alarm

Delay limit (10 second default), the control generates an alarm and the unit disables the compressor and fan

outputs.

Sequence of Operation

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Fan Status Alarm (optional) The control generates a fan status alarm if the fan status input detects the fan is

OFF after any fan speed output has been enabled. A 30 second alarm delay is used to allow the fan to start

operation before an alarm condition is detected. The control monitors the fan output and if the fan is operating at

any speed, the fan status must detect the fan is operating.

Compressor Status Alarm The control generates a compressor failure alarm if the compressor status input

detects the compressor is OFF after the compressor output has been energized. A 6-minute alarm delay is used to

allow the compressor to start (prevents alarms due to timeguard operation) before an alarm condition is detected.

The control monitors the compressor output and if the compressor output is energized, the compressor status

input must detect the compressor operation.

Filter Status Alarm The control provides the ability to generate a dirty filter alarm after the number of fan run

hours exceeds a configurable filter alarm timer limit. The control monitors the fan output and if the fan is

operating at any speed, it accumulates run time. If the fan run time hours exceed the configurable limit, an alarm

is generated. To reset the alarm timer after the alarm has been generated, a Reset Filter Alarm input is provided.

You can disable the filter alarm by setting the Filter Alarm Timer Delay to 0 (factory default).

Indoor Air Quality Alarm The control provides the ability to generate a high CO2 level alarm during occupied

periods when the CO2 sensor value exceeds the adjustable limit. When a transition from unoccupied to occupied

occurs, or the occupied alarm limit is changed to a value that causes an alarm condition to occur, the control will

automatically calculate an alarm delay (equivalent to the configured delay time in minutes/ppm, times the error

that occurred, + 15 minutes). This prevents nuisance alarms from occurring when occupancy changes or the

setpoint is changed. You can disable the IAQ alarm by setting Occupied High IAQ Alarm Limit to 0.

Relative Humidity Alarm The control provides the ability to generate an alarm when the space relative humidity

exceeds the alarm setpoint. Separate occupied and unoccupied high humidity alarm setpoints are provided. The

control provides a 5-minute alarm delay during unoccupied periods. During occupied periods, the controller uses

the occupied high RH alarm limit. When an occupancy transition from unoccupied to occupied occurs, or the

occupied high alarm limit is lowered, causing an alarm condition to occur, the control automatically calculates an

alarm delay (equivalent to the configured delay time in minutes/% RH, times the humidity error condition that

occurred, + 15 minutes). This prevents nuisance alarms when an occupancy change occurs and allows time for

the unit to correct an alarming humidity condition.

Source Water Linkage Failure Alarm (if Source Water Linkage was active) The control generates a Source

Water Linkage failure alarm if Linkage fails after once being active. The Linkage status is monitored and if it fails

to be updated from the Loop controller, then a Source Water Linkage alarm is generated. There is a 6-minute

alarm delay to prevent false alarms.

NOTE You can reset this alarm only by re-establishing Linkage and correcting the condition that caused the

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

Airside Linkage Failure Alarm (if Airside Linkage was active) The control generates an Airside Linkage failure

alarm if Linkage fails after once being active. The Linkage status is monitored and if it fails to be updated from the

master zone controller, then an Airside Linkage alarm is generated. There is a 6-minute alarm delay to prevent

false alarms.

NOTE You can reset this alarm only by re-establishing Linkage and correcting the condition that caused the

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

OAT Sensor Alarm (if Network OA Temperature was active) The control generates an OAT Sensor failure alarm if

the value of OAT fails to be updated through the network after once being active. The update status is monitored

and if it fails to be updated, then an OAT sensor alarm is generated. There is an alarm delay (approximately 1

hour) to prevent false alarms, while minimizing the required update rate for OAT.

NOTE You can reset this alarm by momentarily setting the Shutdown point to Active.

SPT Sensor Alarm (if SPT sensor was active) The control generates an SPT sensor failure alarm if the SPT sensor

fails to communicate with the control for 5 minutes or greater. The update status is monitored and if it fails to be

updated, then an SPT sensor alarm is generated.

ZS Sensor Alarm (if ZS sensor was active) The control generates a ZS sensor failure alarm if the ZS

sensor fails to communicate with the control for 5 minutes or greater. The update status is monitored and if it fails

to be updated, then a ZS sensor alarm is generated.

Troubleshooting the WSHP Open

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32

The WSHP Open controller acts as an intelligent embedded thermostat to the water source heat pump, but can be

monitored and controlled from a third party network.

You must determine which of the following needs troubleshooting:

The WSHP Open controller

The mechanical systems of the WSHP unit

The third party connected network

The WSHP Open controller can troubleshoot itself with Service Test, communicating LEDs, and built-in alarms.

See the unit's Controls and Troubleshooting instructions.

Disconnecting the WSHP Open from the unit control inputs can be valuable in determining whether the problem is

related to the unit/equipment, the controller/equipment, or the controller/network. When disconnected from the

unit control inputs, you can use simple 24V signals to activate G, Y1, Y2, W1, W2, etc. to verify proper unit

operation. If the problem occurs without the WSHP Open connected, then you should begin troubleshooting the

unit/equipment rather than the WSHP Open or network.

LED's

The LEDs indicate if the controller is speaking to the other 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 will appear.

The LED's on the WSHP Open show the status of certain functions.

If this LED is on... Status is...

Power The WSHP Open has power.

Rx The WSHP Open is receiving data from the network segment

Tx The WSHP Open is transmitting data over the network segment

BO# The binary output is active

NOTE If Tx is not lit, the MS/TP token is not being passed between controllers.

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

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

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 Controller has just been formatted

Troubleshooting the WSHP Open

Troubleshooting the WSHP Open

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33

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

2 flashes per second On Two or more devices on this network

have the same network address

2 flashes per second On Firmware halted after frequent

system errors or control programs

halted

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 WSHP Open off,

then on.

Replace the WSHP Open.

Compliance

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34

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

Appendix A: Network Points List for WSHP Open

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35

Third party access to BACnet points in a controller

BACnet system points in the i-Vu Open controllers match physical I/O points to data, such as Outside Air Temp,

to be written to the controller through the network, rather than by using a local hardwired sensor.

When a BACnet system point is written to, the controller uses the network value, even when there is a local

sensor, as long as it is within the Min/Max refresh times noted below.

BACnet writes to system points

The following table lists all of the writeable system points that could be present in an i-Vu Open controller. The

list of points is application-specific, therefore not all points are present in all i-Vu Open controllers. This

information applies whether the system point is being accessed by another i-Vu Open controller or by a third

party system.

In the i-Vu interface, select the controller in the navigation tree and go to Properties > BACnet Objects tab. When

an i-Vu Open controller or a third party system writes to any of the system points, you must use BACnet Priority

Level 16 and the value must not be written to or refreshed more than once per minute (60 seconds).

CAUTION If any other Priority Level is used, the value will not be recognized by the controller.

BACnet System

Points Display

Name

Valid Range BACnet/

Modbus

/N2 Default Value*

LonWorks

Default Value*

Recommended Write

Rrefresh

Time

(min/max)

System Space

Temperature

-50 150F -999 ~180F 1 min/5 min

System Space RH 1 100% -999 -15.96 5 min / 10 min

System Space AQ 200 9999 ppm -999 64537 5 min / 10 min

System OA

Temperature

-50 150F -999 ~180F 5 min / 60 min

[OA] Enthalpy

(BACnet)

High (0) / Low (1) Low (1) Low (1) On change of state

System Outdoor AQ 200 9999 ppm -999 -999 5 min / 60 min

System Water

Temperature

-50 150F -999 ~180F 5 min / 60 min

System

Fire/Smoke

Inactive (0) / Active (1) Inactive (0) N/A On change of state

System Inactive (0) / Active (1) Inactive (0) N/A On change of state

Appendix A: Network Points List for WSHP Open

Appendix A: Network Points List for WSHP Open

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Integration Guide All rights reserved

36

BACnet System

Points Display

Name

Valid Range BACnet/

Modbus

/N2 Default Value*

LonWorks

Default Value*

Recommended Write

Rrefresh

Time

(min/max)

Pressurization

Occupancy control

configuration

1 = Always Occupied

2 = BACnet Schedule

(WebCTRL only)

3 = BAS On/Off (third

party control)*

4 = Remote Occ Input

1 = Always

Occupied

(Only available

through BACnet)

N/A N/A

BAS On/Off*

(Occupancy)

Occupancy control

configuration ust be

set for 3 = BAS

On/Off

1=Inactive

2=Occupied

3=Unoccupied

Inactive (1) Inactive (1) On change of state

* Modbus, N2, and LonWorks default values only apply to multi-protocol controllers.

Points do not apply to multi-protocol controllers.

Reading System Points

To verify that the system point is being written to within the refresh time specified (value varies by point), the i-

Vu Open controller clears any value that is written, once it has been processed by the controller and returned

the system point to its default value. Therefore, a BAS should never read back the system point's value to confirm

the commanded value was successfully received. To confirm a write, refer to the table below for the corresponding

control point that should be read.

NOTE A confirming read should take place at least 30 seconds following the write to verify that the write has

been processed by the controller.

Commanded Points Control Points

Display Name Type /

Instance Object Name Display Name

Type /

Instance Object Name

System Space

Temperature

av:1902 system_spt Space Temperature

- Prime Variable

av:2007 space_temp

System Space

RH

av:1904 system_rh Space Relative

Humidity

av:1011 space_rh

System Space

AQ

av:1903 system_iaq Indoor Air Quality

CO2 (ppm)

av:1009 iaq

System OA

Temperature

av:1901 system_oat Outdoor Air

Temperature

av:1003 oa_temp

Appendix A: Network Points List for WSHP Open

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Integration Guide All rights reserved

37

Commanded Points Control Points

Display Name Type /

Instance Object Name Display Name

Type /

Instance Object Name

[OA] Enthalpy

(BACnet)

bv:1901 oae [OA] Enthalpy

Status

bv:1002 enthalpy_status

System Outdoor

AQ

av:1908 system_oaq Outdoor Air Quality

CO2 (ppm)

av:1012 oaq

System Water

Temperature

av:1905 system_water_t

emp

Changeover Mode av:1014 chgovr_mode

System

Fire/Smoke

bv:1907 fire_shutdown Fire/Smoke

Shutdown

bv:7007 fire_alarm

System

Pressurization

bv:1906 press_override Pressurization bv:7038 press_alarm

BAS On/Off

[Occupancy]

msv:1001 keypad_ovrde Occupancy Status bv:2008 occ_status

Points do not apply to multi-protocol controllers.

Appendix A: Network Points List for WSHP Open

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Integration Guide All rights reserved

38

Network points list for BACnet and Modbus

BACnet Modbus

Point Name Point

Access

Units Default

Value

BACnet Point Name BACnet

Object ID

Modbus

Register

Type

Modbus

Register #

Aux Heat Control

Setpoint

R F aux_heat_stpt AV:3014 Input

Register

(Float)

161

Auxiliary Heat Output R % aux_heat_output AV:2021 Input

Register

(Float)

163

Cooling Lockout

Temperature

R/W F 45 oat_cl_lockout AV:9002 Holding

Register

(Float)

43

Damper Output R % oa_dpr_pos AV:2022 Input

Register

(Float)

169

Leaving Source Water

Temp

R F cwl_temp AV:1017 Input

Register

(Float)

167

Vent Dmpr Pos / DCV

Min Pos

R/W % 20 econ_min AV:4005 Holding

Register

(Float)

131

Outdoor Air

Temperature

R F oa_temp AV:1003 Input

Register

(Float)

87

Override Time

Remaining

R min ovrde_time AV:2016 Input

Register

(Float)

93

Setpoint R/W F occ_ht_stpt AV:3002 Holding

Register

(Float)

19

Setpoint Adjustment R F stpt_adj AV:1006 Input

Register

(Float)

99

Space Temperature -

Prime Variable

R F space_temp AV:2007 Input

Register

(Float)

107

Supply Air

Temperature

R F sa_temp AV:1008 Input

Register

(Float)

109

System Space AQ R/W no units -999 system_iaq AV:1903 Holding

Register

(Float)

149

System Space RH R/W % -999 system_rh AV:1904 Holding

Register

(Float)

151

System Space

Temperature

R/W F -999 system_spt AV:1902 Holding

Register

(Float)

123

Unocc Relative

Humidity Setpoint

R/W %rh 95 unocc_dehum_stpt AV:3012 Holding

Register

(Float)

129

Water Economizer

Control Setpoint

R F h2o_econ_ctrl_stpt AV:3015 Input

Register

(Float)

171

Appendix A: Network Points List for WSHP Open

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Integration Guide All rights reserved

39

BACnet Modbus

Point Name Point

Access

Units Default

Value

BACnet Point Name BACnet

Object ID

Modbus

Register

Type

Modbus

Register #

Water Economizer

Output

R % h2o_econ_output AV:2023 Input

Register

(Float)

173

Compressor Status R (0) Normal

(1) Alarm comp_alarm BV:7013 Discrete

Input

30

Condensate Overflow R (0) Normal

(1) Alarm overflow_alarm BV:7028 Discrete

Input

60

Source Water

Temperature

R (0) Normal

(1) Alarm cwt_alarm BV:7027 Discrete

Input

61

Cool Enable R/W (0) Disable

(1) Enable

(1) Enable cl_enable BV:1011 Coil 36

Dehumidification R (0) Disable

(1) Enable dehum BV:2006 Discrete

Input

9

Supply Fan Status R (0) Off

(1) On sfan_status BV:1003 Discrete

Input

24

Filter R (0) Normal

(1) Alarm filter_alarm BV:7017 Discrete

Input

31

Fire / Smoke

Shutdown

R (0) Normal

(1) Alarm fire_alarm BV:7007 Discrete

Input

32

Heat Enable R/W (0) Disable

(1) Enable

(1) Enable ht_enable BV:1012 Coil 37

High Space

Temperature

R (0) Normal

(1) Alarm spt_hi_alarm BV:7011 Discrete

Input

35

Indoor Air Quality R (0) Normal

(1) Alarm iaq_alarm BV:7005 Discrete

Input

33

Low Space

Temperature

R (0) Normal

(1) Alarm spt_lo_alarm BV:7012 Discrete

Input

39

Occupancy Status R (0) Unoccupied

(1) Occupied occ_status BV:2008 Discrete

Input

18

Setpoint Adjustment R/W (0) Disable

(1) Enable

(1) Enable stpt_adj_enable BV:1013 Coil 26

Shutdown R/W (0) Inactive

(1) Active

(0) Inactive shutdown BV:9001 Coil 1

Space Relative

Humidity

R (0) Normal

(1) Alarm sprh_hi_alarm BV:7018 Discrete

Input

34

Space Temp Sensor R (0) Normal

(1) Alarm spt_fail BV:7001 Discrete

Input

46

Supply Air

Temperature

R (0) Normal

(1) Alarm sat_alarm BV:7004 Discrete

Input

47

Supply Fan Failure R (0) Normal

(1) Alarm sfan_fail_alarm BV:7008 Discrete

Input

5

Fan / Speed R (1) Off

(2) Low

(3) Med

(4) High

(5) On

fan_run MSV:2004 Input

Register

(Signed)

175

Optimal Start Type R/W (1) None

(2) Temp

Compensated

(3) Learning

Adaptive

2 start_type MSV:2009 Holding

Register

(Signed)

154

Appendix A: Network Points List for WSHP Open

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Integration Guide All rights reserved

40

BACnet Modbus

Point Name Point

Access

Units Default

Value

BACnet Point Name BACnet

Object ID

Modbus

Register

Type

Modbus

Register #

System Mode R (1) Off

(2) Fan Only

(3) Economize

(4) Cooling

(5) Heating

(6) Cont Fan

(7) Test

(8) Start Delay

run_status MSV:2002 Input

Register

(Signed)

1

Occ Relative Humidity

Setpoint

R/W %rh 60 occ_dehum_stpt AV:3011 Holding

Register

(Float)

83

Optimal Start R/W hr 1 optm_start AV:9026 Holding

Register

(Float)

147

Smoke Detector

Contact

R (0) Alarm / Open

(1) Normal /

Closed

smk_detect BV:1004 Discrete

Input

1

Effective Cool

Setpoint

R F eff_cl_stpt AV:3005 Input

Register

(Float)

55

Setpoint R/W F unocc_cl_stpt AV:3003 Holding

Register

(Float)

15

Heating Lockout

Temperature

R/W F 65 oat_ht_lockout AV:9003 Holding

Register

(Float)

69

Power Fail Restart

Delay

R/W seconds 180 start_delay AV:9007 Holding

Register

(Float)

127

Setpoint R/W F occ_cl_stpt AV:3001 Holding

Register

(Float)

9

Filter Service Alarm

Timer

R/W hr 600 filter_service_hrs AV:2019 Holding

Register

(Float)

67

Indoor Air Quality CO2

(ppm)

R ppm iaq AV:1009 Input

Register

(Float)

73

Setpoint R/W F unocc_ht_stpt AV:3004 Holding

Register

(Float)

17

System Outdoor Air

Temperature

R/W F -999 system_oat AV:1901 Holding

Register

(Float)

119

System Setpoint

Adjustment

R/W F -999 system_stpt_adj AV:1913 Holding

Register

(Float)

53

Reset Filter Alarm R/W (0) Off

(1) On

(0) Off filter_rntm_clr BV:7517 Coil 22

Effective Heat

Setpoint

R F eff_ht_stpt AV:3006 Input

Register

(Float)

57

Maximum Heating

SAT

R/W F 110 sat_ht_max AV:83004 Input

Register

(Float)

41

Appendix A: Network Points List for WSHP Open

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Integration Guide All rights reserved

41

BACnet Modbus

Point Name Point

Access

Units Default

Value

BACnet Point Name BACnet

Object ID

Modbus

Register

Type

Modbus

Register #

Minimum Cooling SAT R/W F 50 sat_cl_min AV:83003 Input

Register

(Float)

61

Setpoint Adjustment

Range

R/W F 5 stpt_adj_range AV:9015 Holding

Register

(Float)

101

BAS On / Off R/W (1) Inactive

(2) Occupied

(3) Unoccupied

1 keypad_ovrde MSV:1001 Holding

Register

(Signed)

133

ZS Sensor

Configuration

R (0) Normal

(1) Alarm zs_config_fail BV:7055 Discrete

Input

63

Space Relative

Humidity

R %rh space_rh AV:1011 Input

Register

(Float)

103

Space Temp Source R (1) Sensor Failure

(2) SPT Sensor

(3) T55 / T56

(4) Network

(5) Airside

Linkage

(6) Locked Value

spt_status MSV:2003

Fan Off Delay R/W seconds 90 fan_delay_off AV:9024

Air Source Supply Air

Temp

R F link_sat AV:2608

Water Loop Temp R F link_cwt AV:2701

Aux Heat Boiler Water

Temp

R F link_hwt AV:2702

Airside Linkage R (0) Normal

(1) Alarm air_linkage_fail BV:7030

Source Water Linkage R (0) Normal

(1) Alarm cond_water_linkage_fail BV:7031

System Heating

Demand Level

R no units heat_demand_level AV:9036

Airside Linkage R (0) Not Active

(1) Active a_link_status BV:2601

Occ Override Delay R/W min 15 occ_ovr_delay AV:9028

Loop Pump Request R no units loop_request AV:2024

Source Water Linkage R (0) Not Active

(1) Active cw_link_status BV:2701

Aux Heat HW Pump

Status

R (0) Off

(1) On hw_pump BV:2703

System Cooling

Demand Level

R no units cool_demand_level AV:9006

Filter Runtime R hr filter_rntm AV:2015

Compressor Capacity R % comp_cap AV:5001 Input

Register

(Float)

165

Air Source Mode R (1) Off

(2) Warmup

(3) Heat

(4) Cooling

(5) Freecool

(6) Pressure

(7) Evac

(8) Vent

link_ahu_mode MSV:2005 - -

Appendix A: Network Points List for WSHP Open

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

42

BACnet Modbus

Point Name Point

Access

Units Default

Value

BACnet Point Name BACnet

Object ID

Modbus

Register

Type

Modbus

Register #

SPT Sensor R (0) Normal

(1) Alarm spt_sensor_fail BV:7032 Discrete

Input

38

ZS Temp Sensor R (0) Normal

(1) Alarm zst_sensor_fail BV:7051

Loop Pump Status R (0) Off

(1) On loop_pump BV:2702

Outdoor Air Temp

Sensor

R (0) Normal

(1) Alarm oat_fail BV:7029

Fan On Delay R/W seconds 10 fan_delay_on AV:9025

Network points list for N2 and LonWorks

N2 LonWorks

Point Name Point

Access

Units Default

Value

N2

Network

Point Type

N2

Network

Point

Address

SNVT Type SNVT Name

Aux Heat Control

Setpoint

R F ADF 70 nvoAuxHtSP SNVT_temp_p(105)

Auxiliary Heat Output R % ADF 71 nvoAuxHtOut SNVT_lev_percent(81)

Cooling Lockout

Temperature

R/W F 45 ADF 16 nviClLckTemp SNVT_temp_p(105)

Damper Output R % ADF 74 nvoOAVntDmpr SNVT_lev_percent(81)

Leaving Source Water

Temp

R F ADF 73 nvoLvgCWTemp SNVT_temp_p(105)

Vent Dmpr Pos / DCV

Min Pos

R/W % 20 ADF 60 nviDCVMinPos SNVT_lev_percent(81)

Outdoor Air

Temperature

R F ADF 38 nvoOAT SNVT_temp_p(105)

Override Time

Remaining

R min ADF 41 nvoOvrTmRem SNVT_time_min(123)

Setpoint R/W F ADF 9 nviOccHeatSP SNVT_temp_p(105)

Setpoint Adjustment R F ADF 44 nvoSPAdjust SNVT_temp_p(105)

Space Temperature -

Prime Variable

R F ADF 48 nvoSpaceTemp SNVT_temp_p(105)

Supply Air

Temperature

R F ADF 49 nvoSAT SNVT_temp_p(105)

System Space AQ R/W no units -999 ADF 39 nviSysSpAQ SNVT_ppm(29)

System Space RH R/W % -999 ADF 40 nviSysSpRH SNVT_lev_percent(81)

System Space

Temperature

R/W F -999 ADF 56 nviSysSpTmp SNVT_temp_p(105)

Unocc Relative

Humidity Setpoint

R/W %rh 95 ADF 59 nviUnoccRHSP SNVT_lev_percent(81)

Water Economizer

Control Setpoint

R F ADF 75 nvoWtrEconSP SNVT_temp_p(105)

Water Economizer

Output

R % ADF 76 nvoWtrEcnOut SNVT_lev_percent(81)

Compressor Status R (0) Normal

(1) Alarm

BI 30 nvoCmpSafety SNVT_switch(95)

Appendix A: Network Points List for WSHP Open

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

43

N2 LonWorks

Point Name Point

Access

Units Default

Value

N2

Network

Point Type

N2

Network

Point

Address

SNVT Type SNVT Name

Condensate Overflow R (0) Normal

(1) Alarm

BI 60 nvoOvrflwAlm SNVT_switch(95)

Source Water

Temperature

R (0) Normal

(1) Alarm

BI 61 nvoCWTempAlm SNVT_switch(95)

Cool Enable R/W (0) Disable

(1) Enable

(1) Enable BO 36 nviClEnb SNVT_switch(95)

Dehumidification R (0) Disable

(1) Enable

BI 9 nvoDehmRelay SNVT_switch(95)

Supply Fan Status R (0) Off

(1) On

BI 24 nvoFanStatus SNVT_switch(95)

Filter R (0) Normal

(1) Alarm

BI 31 nvoFilter SNVT_switch(95)

Fire / Smoke

Shutdown

R (0) Normal

(1) Alarm

BI 32 nvoFrShtdwn SNVT_switch(95)

Heat Enable R/W (0) Disable

(1) Enable

(1) Enable BO 37 nviHtEnb SNVT_switch(95)

High Space

Temperature

R (0) Normal

(1) Alarm

BI 35 nvoHiSpTemp SNVT_switch(95)

Indoor Air Quality R (0) Normal

(1) Alarm

BI 33 nvoIAQAlm SNVT_switch(95)

Low Space

Temperature

R (0) Normal

(1) Alarm

BI 39 nvoLoSpTmp SNVT_switch(95)

Occupancy Status R (0) Unoccupied

(1) Occupied

BI 18 nvoOccStatus SNVT_switch(95)

Setpoint Adjustment R/W (0) Disable

(1) Enable

(1) Enable BO 26 nviSPAdjEnbl SNVT_switch(95)

Shutdown R/W (0) Inactive

(1) Active

(0) Inactive BO 1 nviShutdown SNVT_switch(95)

Space Relative

Humidity

R (0) Normal

(1) Alarm

BI 34 nvoHiSPRHAlm SNVT_switch(95)

Space Temp Sensor R (0) Normal

(1) Alarm

BI 46 nvoSPTmpSen SNVT_switch(95)

Supply Air

Temperature

R (0) Normal

(1) Alarm

BI 47 nvoSATSensor SNVT_switch(95)

Supply Fan Failure R (0) Normal

(1) Alarm

BI 5 nvoSFAlarm SNVT_switch(95)

Fan / Speed R (1) Off

(2) Low

(3) Med

(4) High

(5) On

ADI 4 nvoFanSpeed SNVT_count_inc(9)

Optimal Start Type R/W (1) None

(2) Temp

Compensated

(3) Learning

Adaptive

2 ADI 20 nviOptStType SNVT_count_inc(9)

System Mode R (1) Off

(2) Fan Only

(3) Economize

(4) Cooling

(5) Heating

(6) Cont Fan

(7) Test

(8) Start Delay

ADI 13 nvoOpMode SNVT_count_inc(9)

Appendix A: Network Points List for WSHP Open

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

44

N2 LonWorks

Point Name Point

Access

Units Default

Value

N2

Network

Point Type

N2

Network

Point

Address

SNVT Type SNVT Name

Occ Relative Humidity

Setpoint

R/W %rh 60 ADF 36 nviOcRHSP SNVT_lev_percent(81)

Optimal Start R/W hr 1 ADF 61 nviOptmStart SNVT_time_hour(124)

Smoke Detector

Contact

R (0) Alarm / Open

(1) Normal /

Closed

BI 1 nvoSmkDetect SNVT_switch(95)

Effective Cool

Setpoint

R F ADF 22 nvoEffCoolSP SNVT_temp_p(105)

Setpoint R/W F ADF 7 nviUnoccClSP SNVT_temp_p(105)

Heating Lockout

Temperature

R/W F 65 ADF 29 nviHtLckTmp SNVT_temp_p(105)

Power Fail Restart

Delay

R/W seconds 180 ADF 58 nviUntStrDly SNVT_time_sec(107)

Setpoint R/W F ADF 4 nviOccCoolSP SNVT_temp_p(105)

Filter Service Alarm

Timer

R/W hr 600 ADF 28 nviFltAlmTm SNVT_time_hour(124)

Indoor Air Quality

CO2 (ppm)

R ppm ADF 31 nvoIAQ SNVT_ppm(29)

Setpoint R/W F ADF 8 nviUnoccHtSP SNVT_temp_p(105)

System Outdoor Air

Temperature

R/W F -999 ADF 54 nviSysOAT SNVT_temp_p(105)

System Setpoint

Adjustment

R/W F -999 ADF 68 nviSysSptAdj SNVT_temp_p(105)

Reset Filter Alarm R/W (0) Off

(1) On

(0) Off BO 22 nviRstFilAlm SNVT_switch(95)

Effective Heat

Setpoint

R F ADF 23 nvoEffHeatSP SNVT_temp_p(105)

Maximum Heating

SAT

R/W F 110 ADF 33 nviMaxHtSAT SNVT_temp_p(105)

Minimum Cooling SAT R/W F 50 ADF 42 nviMinClSAT SNVT_temp_p(105)

Setpoint Adjustment

Range

R/W F 5 ADF 45 nviSPAdjRng SNVT_temp_p(105)

BAS On / Off R/W (1) Inactive

(2) Occupied

(3) Unoccupied

1 ADI 1 nviBASOnOff SNVT_count_inc(9)

ZS Sensor

Configuration

R (0) Normal

(1) Alarm

BI 63 nvoZsCfgFail SNVT_switch(95)

Space Relative

Humidity

R %rh ADF 46 nvoSpaceRH SNVT_lev_percent(81)

Compressor Capacity R % ADF 72

SPT Sensor R (0) Normal

(1) Alarm

BI 38

Appendix B: BACnet Protocol Implementation Conformance Statement

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

45

The PIC statements are updated regularly. Please refer to the BACnet website

http://www.bacnetinternational.net/catalog/index.php?m=28 for the latest information.

Appendix B: BACnet Protocol Implementation Conformance Statement

Appendix C: Modbus Protocol Implementation Conformance Statement

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

46

Date: 11/12/2013

Vendor Name: Carrier

Product Names: WSHP Open

Product Model Number: Water Source Heat Pump

Protocol Description:

The WSHP Open controller speaks the Modicon Modbus RTU/ASCII Protocol as described in the Modicon Modbus

Protocol Reference Guide, PI-MBUS-300 Rev.J. Further details on the Modbus implementation are described

below.

Product Description:

The WSHP Open is a factory-installed water source heat pump controller that is capable of speaking multiple

protocols.

Serial Transmission Mode: Supported?

RTU Slave only

ASCII Not supported

Communication

Types: Baud rates: Data Bits: Parity: Stop Bits:

2-wire EIA-485,

9600, 19200,

38400, 76800

8 None 1

Function Codes: Purpose: Used with Register

Numbers:

01 Read Coil Status Read Discrete Outputs 00001 - 65535

02 Read Input Status Read Discrete Inputs 00001 - 65535

03 Read Holding Registers Read Holding Registers 00001 - 65535

04 Read Input Registers Read Input Registers 00001 - 65535

05 Force Single Coil Write Discrete Outputs (single) 00001 - 65535

06 Preset Single Register Write Holding Registers (single) 00001 - 65535

15 Force Multiple Coils Write Discrete Outputs 00001 - 65535

16 Preset Multiple Coils Write Holding Registers 00001 - 65535

Register Type: Range: Function Codes Used with this

Register Type:

Float Value (FLOAT) Single-Precision IEEE floating point

value

3 Read Holding Register

6 Preset Single Register

16 Preset Multiple Register

Appendix C: Modbus Protocol Implementation Conformance Statement

Appendix C: Modbus Protocol Implementation Conformance Statement

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

47

Unsigned Integer (UINT) 0 - 65535

3 Read Holding Register

6 Preset Single Register

16 Preset Multiple Register

Signed Integer (SINT) -32768 - 32767

3 Read Holding Register

6 Preset Single Register

16 Preset Multiple Register

Discrete Input (DI) 0 = Off, 1 = On 2 Read Input Status

Discrete Output (DO) 0 = Off, 1 = On

1 Read Coil Status

5 Force Single Coil

15 Force Multiple Coils

Appendix D: Johnson N2 Protocol Implementation Conformance Statement

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

48

Date: 11/12/2013

Vendor Name: Carrier

Product Names: WSHP Open

Product Model Number: Water Source Heat Pump

Protocol Description:

N2 is not a standard protocol, but one that was created by Johnson Controls, Inc. that has been made open and

available to the public. The speed of N2 network is limited to only 9600 baud. The N2 slave address can be set

from 01 to 99.

Product Description:

The WSHP Open is a factory-installed water source heat pump controller that is capable of speaking multiple

protocols. The WSHP Open controller speaks the Johnson N2 Open Protocol as described in the Metasys N2

System Protocol Specification (for Vendors) document, revision 6/13/96. Further details on the N2 supported

implementation are described below.

Communication Types: Baud

rates: Data Bits: Parity: Stop Bits:

2-wire EIA-485 9600 8 None 1

Network Point Types:

Analog Inputs (AI)

Binary Inputs (BI)

Analog Outputs (AO)

Binary Outputs (BO)

Internal Floats (ADF)

Internal Integers (ADI)

Internal Bytes (BD)

Protocol Commands:

Identify Device Type

Sync Time

Poll Without Acknowledge

Poll With Acknowledge

Read Analog Input

Read Binary Input

Read Analog Output

Read Binary Output

Read Internal Parameter

Write Analog Input

Write Binary Input

Write Analog Output

Appendix D: Johnson N2 Protocol Implementation Conformance Statement

Appendix D: Johnson N2 Protocol Implementation Conformance Statement

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

49

Write Binary Output

Write Internal Parameter

Override Analog Input

Override Binary Input

Override Internal Parameter

Override Release Request

Appendix E: LonWorks Protocol Implementation Conformance Statement

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

50

Date: 11/12/2013

Vendor Name: Carrier

Product Names: WSHP Open

Product Model Number: Water Source Heat Pump

Product Description:

The WSHP Open is a factory-installed water source heat pump controller that is capable of speaking multiple

protocols. When the LonWorks Option Card (LON-OC), is installed in the field, it enables the WSHP Open to

communicate over a LonTalk network. The WSHP Open does not conform to a standard LonWorks profile, but is

self-documenting and any network management tool can manage and configure it over the network. An external

interface file (.XIF), is also available so that any network management tool can design and configure the WSHP

Open prior to installation. Contact your Carrier representative for this .XIF file.

LonWorks is an open protocol that requires the use Echelon's Neuron microprocessor to encode and decode the

LonWorks packets. In order to reduce the cost of adding the Echelon chip to every module, a separate LonWorks

Option Card (LON-OC) was designed to connect to the WSHP Open.

This accessory card must be ordered separately and is connected by attaching its ribbon cable into the J15

connector on the WSHP Open. The WSHP Opens baud rate (1 and 2 on SW3) must be set to 38.4k to

communicate with the LON-OC. The address switches (SW1 and SW2) are not used with LonWorks.

Tranceiver Type: TP/FT 10

Appendix E: LonWorks Protocol Implementation Conformance Statement

Document revision history

WSHP Open v3 CARRIER CORPORATION 2021

Integration Guide All rights reserved

51

Important changes to this document are listed below. Minor changes such as typographical or formatting errors are not

listed.

Date Topic Change description Code*

11/20/19 Appendix A: Network Points List >

Third party access to BACnet points in

a controller

New topic C-TS-JN-E-RD

2/5/19 Wiring inputs and outputs Corrected Condensate Switch to Connection Pin Numbers J5 - 5 &

6

C-TS-CP-F

What is the WSHP Open controller? Label on J5 - IN 2 changed to Remote Occupancy and J% - 6 to

Condensate Overflow Switch.

C-TS-CP-F

5/22/18 Troubleshooting BACnet MS/TP

Troubleshooting ARC156

Corrected BACnet Device Instance number C-TS-RD-F

3/14/18 Auxiliary Heat Aux Heat Control information added C-AE-WB-E

2/8/17 Network points list for N2 and

LonWorks

Lonworks SNVT for System Setpoint Adjustment changed C-TS-JN-E

Wiring inputs and outputs Added Wireless Sensors and references to appropriate sensor

guides.

C-AE-WB-O

Sequence of operation - Linkage air

source mode determination

Clarified reason and method for generating a particular mode.

Evacuation/Shutdown changed to Evacuation.

C-AE-WB-E

BACnet ARC156 Added instructions C-D

All Troubleshooting sections Reformatted and information on Static Binding removed since we

only use Dynamic Binding now.

C-D

2/22/16 Start-up Added USB Link wiring caution. C-TS-RD-E-JH

5/27/15 Wiring inputs and outputs Correction - added ZS sensors C-TS-RD-E-WB

5/13/15 Sequence of Operation -

Dehumidification

Correction - removed references to specific reheat type. C-AE-WB-E

3/10/15

Start-up Removed BACview and added Equipment Touch and System

Touch.

C-AE-BR-O-WB

Adjusting MS/TP properties using an

Equipment Touch

New topic C-AE-BR-O-WB

Appendix A: Network points list for

WSHP Open

Network points list updated for BACnet, Modbus, N2, and

LonWorks

C-AE-BR-O-WB

Entire document Replaced references to BACview with Equipment Touch C-AE-BR-O-WB

6/5/14 Configuring for BACnet MS/TP Added note that controller counts as a full load on the MS/TP bus. C-TS-RD-E

* For internal use only

Document revision history

<

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