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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
WSHP Open v3 CARRIER CORPORATION 2021
Integration Guide All rights reserved
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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Integration Guide All rights reserved
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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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Integration Guide All rights reserved
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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.
Communications wiring
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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.
Communications wiring
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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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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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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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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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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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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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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
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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
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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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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
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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
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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
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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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