Table of Contents. WSHP Open v3

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1 WSHP Open v3 Integration Guide CARRIER CORPORATION 2012 A member of the United Technologies Corporation family Stock symbol UTX Catalog No /29/2012

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3 Table of Contents Introduction... 1 What is the WSHP Open controller?... 1 Safety Considerations... 3 Wiring inputs and outputs... 4 Installation... 5 Communications wiring - protocols... 5 Protocol Overview... 5 Configuring for BACnet MS/TP... 6 Configuring for Modbus RTU... 7 Configuring for N LonWorks Configuring for LonWorks Option Card (Part #LON-OC) Commissioning the controller for LonWorks communication Start-up Sequence of Operation Scheduling Fire/Smoke detector input Shutdown input Indoor fan Cooling Reverse cycle heating Auxiliary heat Indoor air quality (IAQ) and demand control ventilation (DCV) Dehumidification Waterside economizer Demand limiting Power failure restart delay Alarms Troubleshooting LED's BACnet MS/TP Modbus Johnson N LonWorks Compliance FCC Compliance CE Compliance BACnet Compliance Appendix A: Network Points List for WSHP Open Appendix B: BACnet Protocol Implementation Conformance Statement Appendix C: Modbus Protocol Implementation Conformance Statement Appendix D: Johnson Controls N2 Protocol Implementation Conformance Statement Appendix E: LonWorks Protocol Implementation Conformance Statement Index WSHP Open v3 i

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5 Introduction 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 Modbus Johnson N2 LonWorks Carrier s diagnostic display tools such as BACview 6 Handheld device or Virtual BACview application can be used with the WSHP Open controller via the 5-pin J12 Access port. Refer to illustration below. WSHP Open v3 1

6 Introduction CAUTION If there is a jumper on the Format pins and power is cycled to the controller, all Modbus, N2, and LonWorks points will be lost. 2 WSHP Open v3

7 Safety Considerations Disconnect electrical power to the WSHP Open before wiring it. Failure to follow this warning could cause electrical shock, personal injury, or damage to the controller. 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. WSHP Open v3 3

8 Wiring inputs and outputs Wiring inputs and outputs WSHP Open Inputs and Outputs Table Input/Output Type Part Numbers Type of I/O Connection Pin Numbers Inputs I/O Channel Space Temperature Sensor SPS, SPPL, SPP Communicating J13, 1-4 Local Access 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) J1-2 BI - 3 Stage 1 Compressor Status N/A BI (Dry Contacts) J1-10 BI - 5 Leaving Condenser 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 J 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/ * J22-1 & 2 AO ma) Supply Fan On/ N/A BO Relay (24 Vac, 3A) * J1-4 BO - 1 (G) Low speed (3-speed only) W2-Aux Heat or 2-pos. Water N/A BO Relay (24 Vac, 3A) * J1-5 BO - 2 Economizer 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 N/A BO Relay (24 Vac, 3A) * J11-5 & 6 (N.O.) BO - 7 (3-speed Only) Fan Speed High/Low N/A BO Relay (24 Vac, 3A) * J11-2 & 3 (N.O.) BO - 8 (3-speed Only) 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 J WSHP Open v3

9 Installation Communications wiring - protocols 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 application, many different protocols are 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. The WSHP Open is an effective solution to minimize the amount of controllers that you may need to change in order to communicate with different types of protocols. You can set the controller to communicate 1 of 4 different protocols: BACnet MS/TP Modbus N2 LonWorks The default setting is BACnet MS/TP. Switch 3 (SW3) on the board sets protocol and baud rate. Switches MSB (SW1) and LSB (SW2) set the board s network address. See table below for specific switch settings. The third party connects to the controller through port J19 for BACnet MS/TP, Modbus, and N2, and through J15 for the LonWorks Option Card. NOTES Changing protocol requires no programming or point assignment by the installer or operator. Power must be cycled after changing the MSB (SW1) - LSB (SW2) settings or connecting the LonWorks Option Card to J15. SW3 Switch Settings Table Protocol Selection Baud Rate Protocol DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1 BACnet MS/TP Master Unused Off Off Off On Off Select Baud Select Baud (Default) Modbus Slave Unused Off Off On On Off Select Baud Select Baud N2 Slave Unused Off Off Off On On Off Off Lonworks Unused On On Off On Off Off On Baud Selection Table Baud Rate SW3/DS2 SW3/DS1 9,600 Off Off 19,200 On Off 38,400 Off On 76,800 (Default) On On WSHP Open v3 5

10 Installation Configuring for BACnet MS/TP Refer to Appendix B for the Protocol Implementation Conformance Statement, or download the latest from BACnet International 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 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 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 controller s 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 Set the SW3 Comm Selector DIP switches DS1 and DS2 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 Selection Table Baud Rate SW3/DS2 SW3/DS1 9,600 Off Off 19,200 On Off 38,400 Off On 76,800 On On 4 Set SW3 Comm Selector DIP switches DS3 through DS6 for BACnet MS/TP. See table and example below. 5 Leave DS7 and DS8 in the OFF position. These switches are not applicable to MS/TP. SW3 Protocol Switch Settings for MS/TP DS8 DS7 DS6 DS5 DS4 DS3 Off Off Off Off On Off 6 WSHP Open v3

11 The following example shows the DIP switches set for 76.8k (Carrier default), and MS/TP. 6 Connect the MS/TP network to the controller's J19 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. 7 Turn on the WSHP Open's power. Configuring for Modbus RTU Refer to Appendix C (page 33) 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 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. WSHP Open v3 7

12 Installation 3 Set the SW3 Comm Selector DIP switches DS1 and DS2 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 Selection Table Baud Rate SW3/DS2 SW3/DS1 9,600 Off Off 19,200 On Off 38,400 Off On 76,800 On On 4 Set SW3 Comm Selector DIP switches DS3 through DS6 for Modbus. See example below. 5 Leave DS7 and DS8 in the OFF position. These switches are not applicable to Modbus. SW3 Protocol Switch Settings for Modbus DS8 DS7 DS6 DS5 DS4 DS3 Off Off Off On On Off The following example shows the DIP switches set for 9600 baud and Modbus. 6 Connect the Modbus EIA-485 network to the WSHP Open's J19 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. 7 Turn on the WSHP Open's power. 8 WSHP Open v3

13 Configuring for N2 Refer to Appendix D (page 35) 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 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. 3 Set the Comm Selector DIP switches DS1 and DS2 for the 9600 baud. NOTE Use the same baud rate and communication settings for all controllers on the network segment. TheWSHP Open is fixed at 9600 baud, 8 data bits, No Parity, and 1 Stop bit. 4 Set SW3 Comm Selector DIP switches DS3 through DS6 for N2. See example below. 5 Leave DS7 and DS8 in the OFF position. These switches are not applicable to N2. SW3 Protocol Switch Settings for N2 DS8 DS7 DS6 DS5 DS4 DS3 Off Off Off Off On On The following example shows the DIP switches set for 9600 baud and N2. 6 Connect the N2 EIA-485 network to the controller's J19 port. Connect to Net+, Net-, and SHLD. WSHP Open v3 9

14 Installation 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. 7 Turn on the WSHP Open's power. LonWorks 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 for the LonWorks Protocol Implementation Conformance Statement (PICS). 10 WSHP Open v3

15 Configuring for 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 controller s rotary address switches are not used when the LON-OC is installed. That s because each LON-OC has a 48-bit Neuron ID that makes it unique on the LonWorks network. 2 Set the Comm Selector DIP switches DS1 and DS2 on SW3 for 38.4k Communications speed. This is the speed at which the LON-OC speaks to the WSHP Open. It is fixed at 38.4k. 3 Set the Comm Selector DIP switches DS3 through DS6 on SW3 for LonWorks. See example below. 4 Set the Comm Selector DIP switch DS7 on SW3 to the ON position to enable the LON-OC. 5 Leave Comm Selector DIP switch DS8 on SW3 in the OFF position since it is not used. SW3 Protocol Switch Settings for LonWorks DS8 DS7 DS6 DS5 DS4 DS3 Off On On Off On Off The following example shows the DIP switches set for 38.4k baud and the LON-OC enabled. 6 Plug the LON-OC's ribbon cable into Comm Option Port J15 on the controller. See illustration below. CAUTION! The controller must be OFF before being connected. WSHP Open v3 11

16 Installation 7 Connect the LonWorks network to the LON-OC via the 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. 8 Turn on the WSHP Open's power. 9 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 system s network layout diagram. This is done using the device s unique Neuron ID. A network management tool such as Echelon s 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 device s 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. NOTE Contact your local Carrier representative for a copy of the.xif file. 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. Start-up To start up the WSHP Open, you need one of the following user interfaces to the controller. These items let you access the controller information, read sensor values, and test the controller. This interface... Virtual BACview application - runs on a laptop connected to controller's Local Access port 1, 2 BACview6 Handheld keypad/display device - connects to controller's Local Access port 1, 2 BACview6 keypad/display device connected to controller's Rnet port 2 Provides a... Temporary interface Temporary interface Permanent interface 1 Requires a USB Link (USB-L). 2 See the BACview Installation and User Guide for instructions on connecting and using the above items. 12 WSHP Open v3

17 Sequence of Operation 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 13) for occupancy types. The following sections describe the multi-protocol controller's functions. All point objects mentioned in this sequence of operation reference the BACview 6 Handheld 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 BACview 6 device, 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 BACview 6 device, 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 BACview 6 Handheld device, 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. To enter a daily schedule, navigate to Configuration > Schedule, enter BACview 6 Admin Password (1111) > schedule_schedule and then enter either a Weekly or Exception schedule for the unit. WSHP Open v3 13

18 Installation Important note for the following: 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 utilize the occupancy contact input. The unit enters an occupied mode whenever 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 utilize 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 utilize this input. 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 whenever 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) 14 WSHP Open v3

19 When power is reapplied after a power outage, there is a configurable delay of 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 or condensate overflow alarm is active, the fan is shutdown immediately, regardless of occupancy state or demand. 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 motor s 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 Whenever 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 (110 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 Whenever 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 (50 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. Whenever 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 equipment s 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) 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 is greater than the occupied cooling setpoint WSHP Open v3 15

20 Installation Space temperature reading is valid If unoccupied, the SPT 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 Condenser Water Pump is on (if Condensor Water Linkage active) 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 5 F 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) 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 is less than the occupied heating setpoint Space Temperature reading is valid If unoccupied, the SPT is less then the unoccupied heating setpoint OAT > Heating Lockout Temperature if OAT is available Condenser Water Pump is on (if Condensor Water Linkage active) 16 WSHP Open v3

21 If all the above conditions are met, the heating outputs are energized as required, otherwise they are deenergized. 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. 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 the compressor capacity is insufficient, or a compressor failure occurs, the auxiliary heat is used. Unless the compressor fails, the auxiliary heat only operates to supplement the heat provided by the compressor, if the space temperature falls more than 1 F 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 1 F 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 1 F 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 1 F 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. WSHP Open v3 17

22 Installation Indoor air quality (IAQ) and demand control ventilation (DCV) If the optional indoor air quality sensor is installed, 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 modulating hot water reheat option (HWR). This function requires an accessory 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 the network input point System Space RH in place of the hard-wired RH sensor. When the indoor relative humidity becomes greater then 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 hot water 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 HWR 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 and HWR coil. 18 WSHP Open v3

23 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 condenser 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 SPT is greater than the occupied cooling setpoint or less than the occupied heating setpoint and the condenser water is suitable Space temperature reading is valid If unoccupied, the SPT is greater than the unoccupied cooling setpoint, or less than the unoccupied heating setpoint, and the condenser water is suitable Modulating water/2-position water economizer control - modulates a water valve to control condenser 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 5 F 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 condenser water loop temperature is suitable for heating (at least 5 F 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 condenser 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 condenser water loop when the entering water loop temperature is at least 5 F 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 5 F 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. WSHP Open v3 19

24 Installation 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 whenever 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. Whenever 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 whenever an occupancy change occurs and allows time for the unit to correct an alarming temperature condition. Condenser Water Temperature Alarm The control has 4 configurable alarm limits for condenser 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 condenser 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) whenever 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. 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. 20 WSHP Open v3

25 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 whenever the CO2 sensor value exceeds the adjustable limit. Whenever 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 whenever 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. Whenever 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 whenever an occupancy change occurs and allows time for the unit to correct an alarming humidity condition. Condenser Water Linkage Failure Alarm (if Condenser Water Linkage was active) The control generates a Condenser 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 Condenser 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. WSHP Open v3 21

26 Troubleshooting Troubleshooting 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. The 3 distinct components for troubleshooting are: The WSHP Open controller The mechanical systems of the WSHP unit The third party connected network First, you must determine which component needs troubleshooting. The WSHP Open controller can troubleshoot itself with Service Test, communicating LED s, and built-in alarms, which are discussed in 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 LED s indicate if the controller is speaking to the other devices on the network. The LED s should reflect communication traffic based on the baud rate set. The higher the baud rate, the more solid the LED s 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 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 22 WSHP Open v3

27 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. BACnet MS/TP Check the following to troubleshoot your WSHP Open: 1 Verify that the BAS and controller are both set to speak the BACnet MS/TP protocol on the Comm Selector DIP switches DS3 - DS6. 2 Verify that 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 through the BACview device. Click and hold the FN key and the. key at the same time. Scroll to the bottom of the page to Network Communications to view the active protocol and baud rate. 1 Verify that 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. 2 Verify that the BAS and the controller have the same communication settings (8 data bits, No Parity, and 1 stop bit). 3 Verify proper connection wiring between the BAS and the controller. 4 Verify that the controller has a unique MAC address on the MS/TP bus. The controller s MS/TP MAC address is set by its rotary address switches. 5 Verify that the BAS is reading or writing to the proper BACnet objects in the controller. Refer to Appendix A for the points list for the controller. 6 BAS must be reading or writing to the proper addresses on the controller. Refer to Appendix A (page 28) for the points list of the controller. 7 Verify that the BAS is sending his requests to the proper MS/TP MAC address of our controller. 8 Present the BAS company with a copy of the controller s BACnet PICS so that they know which BACnet commands are supported. Refer to Appendix B for the BACnet PICS. In certain situations, it may be necessary to adjust the MS/TP Protocol timing settings through the BACview 6 device. It may be necessary to adjust the following two MS/TP Protocol timing settings through the BACview device: 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. WSHP Open v3 23

28 Troubleshooting 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. Any positive integer is a valid number. 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 MS/TP networks can be comprised of both master and slave nodes. Valid MAC addresses for master nodes are and valid addresses for Slave nodes are 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 (page 28) for Points Mapping tables. See Appendix B (page 32) for the BACnet Protocol Implementation Conformance Statement (PICS). Editing MS/TP Properties: 1 From the default screen, press any key to continue. 2 Click the LOGIN button and enter a password of Click OK. 4 Click the System Settings button. 5 Click the down arrow. scroll to the Network menu and press the ENTER button. The BACnet Settings are now shown, Max Masters and Max Info Frames. If you want to edit Max Masters: 1 Click the ENTER button to enter edit mode. 2 Use arrow keys and keypad to either type in a new value (1-127), or click the DECR/INCR buttons to decrease/increase the value, respectively. 3 Click OK to accept the change. If you want to edit Max Info Frames: 1 Click the down arrow and then press the ENTER button to enter edit mode. 2 Use arrow keys and keypad to either type in a new value (1-999), or hit the DECR/INCR buttons to decrease/increase the value, respectively. 3 Click OK button to accept the change. 24 WSHP Open v3

29 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 Verify that 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 through the BACview device. Click and hold the FN key and the. key at the same time. Scroll to the bottom of the page to Network Communications to view the active protocol and baud rate. 1 Verify that 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. 2 Verify that the BAS and the controller have the same communication settings (8 data bits, No Parity, and 1 stop bit). 3 Verify proper connection wiring between the BAS and the controller. 4 Verify that the rotary address switches are set for the controller's unique slave address. 5 BAS must be reading or writing to the proper point addresses on the controller. 6 BAS is sending requests to the proper slave address of the controller. NOTE Refer to Appendix C (page 33) 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 04 Slave Device Failure The register address used in the query is not supported by the controller. The Modbus Master has attempted to write to a nonexistent register or a read-only register in the controller. Johnson 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 Verify that 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 through the BACview device. Click and hold the FN key and the. key at the same time. Scroll to the bottom of the page to Network Communications to view the active protocol and baud rate. WSHP Open v3 25

30 Troubleshooting 1 Verify that 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. 2 Verify that the BAS and the controller have the same communication settings (8 data bits, No Parity, and 1 stop bit). 3 Verify proper connection wiring between the BAS and the controller. 4 Verify that the rotary address switches are set for the controller's unique slave address. 5 BAS must be reading or writing to the proper point addresses on the controller. 6 BAS is sending requests to the proper slave address of the controller. NOTE Refer to Appendix D (page 35) for the Protocol Implementation Conformance Statement. 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 Verify that 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 through the BACview device. Click and hold the FN key and the. key at the same time. Scroll to the bottom of the page to Network Communications to view the active protocol and baud rate. 1 BAS must be reading or writing to the proper point addresses on the controller. 2 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. 3 Verify that controller has been properly commissioned onto the LonWorks network. Commissioning is done with a network management tool such as LonMaker and allows the system integrator to associate the controller with the LonWorks system s network layout diagram. This is done using the controller s unique Neuron ID. The Network Management Tool is also used to upload the controller s.xif file to determine the network variables that reside inside of the controller. 4 Use the Browse feature of the Network Management Tool to verify that you can communicate and get realtime values from the controller before connecting the BAS. 5 Once you have confirmed communications with the controller using the Network Management Tool, connect the BAS. 6 Verify that the BAS is connected properly to the LON-OC's 2-wire TP/FT-10 Net port. The LON-OC s TP/FT-10 port is polarity insensitive. The BAS may have to configure jumper or DIP switches on their end to support TP/FT WSHP Open v3

31 Compliance 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 user s 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 BACnet is a registered trademark of ASHRAE. ASHRAE does not endorse, approve or test products for compliance with ASHRAE standards. Compliance of listed products to requirements of ASHRAE Standard 135 is the responsibility of the BACnet manufacturers Association (BMA). BTL is a registered trademark of the BMA. WSHP Open v3 27

32 Appendix A: Network Points List for WSHP Open Appendix A: Network Points List for WSHP Open 28 WSHP Open v3

33 WSHP Open v3 29

34 Appendix A: Network Points List for WSHP Open 30 WSHP Open v3

35 WSHP Open v3 31

36 Appendix B: BACnet Protocol Implementation Conformance Statement Appendix B: BACnet Protocol Implementation Conformance Statement The PIC statements are updated regularly. Please refer to the BACnet website for the latest information. 32 WSHP Open v3

37 Appendix C: Modbus Protocol Implementation Conformance Statement Date: 06/30/2008 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: RTU ASCII Supported? Slave only Not supported Communication Types: Baud rates: Data Bits: Parity: Stop Bits: 2-wire EIA-485, 9600, 19200, 8 None , Function Codes: Purpose: Used with Register Numbers: 01 Read Coil Status Read Discrete Outputs Read Input Status Read Discrete Inputs Read Holding Registers Read Holding Registers Read Input Registers Read Input Registers Force Single Coil Write Discrete Outputs (single) Preset Single Register Write Holding Registers (single) Force Multiple Coils Write Discrete Outputs Preset Multiple Coils Write Holding Registers Register Type: Float Value (FLOAT) Range: Unsigned Integer (UINT) Single-Precision IEEE floating point value Function Codes Used with this Register Type: 3 Read Holding Register 6 Preset Single Register 16 Preset Multiple Register 3 Read Holding Register 6 Preset Single Register 16 Preset Multiple Register WSHP Open v3 33

38 Appendix C: Modbus Protocol Implementation Conformance Statement Signed Integer (SINT) 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 34 WSHP Open v3

39 Appendix D: Johnson Controls N2 Protocol Implementation Conformance Statement Date: 06/30/2008 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 Data Bits: Parity: Stop Bits: rates: 2-wire EIA 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 WSHP Open v3 35

40 Appendix D: Johnson Controls N2 Protocol Implementation Conformance Statement Write Analog Output Write Binary Output Write Internal Parameter Override Analog Input Override Binary Input Override Internal Parameter Override Release Request 36 WSHP Open v3

41 Appendix E: LonWorks Protocol Implementation Conformance Statement Date: 06/30/2008 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 Open s baud rate (DS1 and DS2 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 WSHP Open v3 37

42 Index Index B BACnet compliance 27 BACnet MS/TP 6 C Compliance 27 F FCC compliance 27 J Johnson N2 9 L LED's 22 LonWorks 10, 12 LonWorks Option Card 11 M Modbus 7 N Network Points List 28 S Sequence of operation Alarms 20 Auxiliary Heat 17 Cooling 15 Dehumidification 18 Demand limiting 20 Fire/Smoke detector input 14 Indoor air quality and demand control ventilation 18 Indoor fan 14 Power failure restart delay 20 Reverse cycle heating 16 Scheduling 13 Shutdown input 14 Waterside economizer 19 Start-up 12 T Troubleshooting 22 Troubleshooting for BACnet MS/TP 23 Troubleshooting for LonWorks 26 Troubleshooting for Modbus 25 Troubleshooting for N2 25 W Wiring Inputs and outputs 4 WSHP Open v3 38

43

44 CARRIER CORPORATION 2012 A member of the United Technologies Corporation family Stock symbol UTX Catalog No /29/2012

Contents. Appendix E: LonWorks Protocol Implementation Conformance Statement Document revision history... 47

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