CPCS SWHP BACnet MS/TP Interface User s Guide DOCUMENT #: SVW05-BACNET-MSTP

CPCS SWHP BACnet MS/TP Interface User s Guide DOCUMENT #: SVW05-BACNET-MSTP-20170713 UPDATED: JULY 2017

INTRODUCTION PoolPak dehumidifiers equipped with the CommandPak Control System for PoolPak SWHP (CPCS-SWHP) can be directly connected to a BACnet MS/TP based Building Automation System (BAS). Based on Carel s pconet serial card, the interface allows connection to an RS-485 network. 80 control points, including all basic information and set points for the PoolPak dehumidification system, are available through the interface. BACnet Configuration Parameters The BACnet configuration parameters for the controller are accessed in the configuration menu. To access this menu: 1. Press the I button on the RIU (Esc on the CM1 module). 2. Enter the password 9995. 3. Use the arrow keys to scroll down to the following parameters. 062. BAUDRATE Sets the baud rate for the onboard serial port. It must be set to 19200 for use with the BACnet interface. 19200 is the factory default setting for this parameter. Note that this is the baud rate of the internal serial interface between the BACnet board and the PoolPak controller. The baud rate of the BACnet MS/TP connection is set with a utility program from Carel. See the Interface Card Field Setup and Configuration section of this document for more information. BAS Addr Sets the address of the BACnet interface card in the serial slot of the controller. It must be set to 1 for proper operation of the BACnet interface. The factory default setting is 1. LonWorks Inst Sets the type of BAS interface board installed in the control module, CM1. It must be set to NO for use with a BACnet interface. Note that this is the internal serial address of the BACnet board. The station address for the BACnet MS/TP network is set with a utility program from Carel. See the Interface Card Field Setup and Configuration section of this document for more information. Ser Port Proto Sets the protocol the control module will use with the installed BAS board. It must be set to RS485 for use with a BACnet interface. 4. After changing any of the above parameters, reboot the controller by cycling power with the unit control power switch. This switch is located within or adjacent to the main control panel of the dehumidifier. PHYSICAL NETWORK CONNECTION The three wire RS-485 connection is located on the pconet interface card. The pconet card occupies the serial card slot in the CM1 control module. This control module is located in the main control panel of the ComPak dehumidifier. Be sure to observe proper network polarity when making the connection to the BACnet network. The terminals on the pconet board are labeled clearly on the serial card cover. The RS-485 connection to the interface card should comply with standard installation practices. Use care to route the cable away from sources of interference and adhere to standard cable length and network topography restrictions for a BACnet 2017 PoolPak LLC. All rights reserved. Page 2

MS/TP network. The pconet board contains built-in termination resistors that can be enabled by jumpers P1, P2, and P3. The jumpers have the following functions: P1 Adds a 510 ohm resistor between the negative line and GND. P2 Adds a 120 ohm resistor between the positive and negative data lines. P3 Adds a 510 ohm resistor between the positive line and the +5VDC internal bus. The jumpers are all installed by default at the factory. In most installations, all three jumpers should be installed if the pconet board resides at either end of the RS-485 network. If instead, it is located between other nodes on the network, all three jumpers should be disconnected to disable the termination resistors. CONTROL POINTS MAPPING 80 objects are accessible through the BACnet interface. Set points, sensor values, and enumerated variables are shared as analog-value objects. Status information points are shared as binary-value objects. The interface card is pre-configured at the factory with a device instance number of 77000. To change this value, follow the instructions shown in the Interface Card Field Setup and Configuration section of this document. The following table lists the available points along with their object types and instance numbers OBJECT TYPE OBJECT INSTANCE OBJECT NAME DESCRIPTION UNITS AV 1 SplyFanCurr Supply Fan Current Amperes AV 2 RtnFanCurr Return Fan Current Amperes AV 3 Cmpr1Curr Compressor System1 Current Amperes AV 4 RtnAirTemp Return Air Temperature ºC AV 5 OutsAirTemp Outside Air Temperature ºC AV 6 ExhDprFdBk Actual Exhaust Damper Position (%) % Open AV 7 RecircDprFdBk Actual Recirc Damper Position (%) % Open AV 8 OutsDprFdBk Actual Outside Air Damper Position (%) % Open AV 9 AirOffEvapTemp Air Leaving Evaporator Temperature ºC AV 10 SurfTemp Cold Surface Temperature ºC AV 11 RtnAirRH Return Air Relative Humidity % AV 12 OutsAirRH Outside Air Relative Humidity % AV 13 AirOffEvapRH Air Leaving Evap Relative Humidity % AV 14 Cmpr2Curr Compressor System 2 Current Amperes AV 15 PoolTemp1 Pool Temperature 1 ºC AV 16 PoolTemp2 Pool Temperature 2 ºC AV 17 SplyAirTemp Supply Air Temperature ºC AV 18 RtnAirCO2Lvl Return Air CO2 Level PPM AV 19 FuzzyDprChg Fuzzy Logic Damper Control Variable N/A AV 20 FuzzyRatCmprChg2 Fuzzy Logic Space Temp Ctl Variable N/A 2017 PoolPak LLC. All rights reserved. Page 3

AV 21 FuzzyDptCmprChg Fuzzy Logic Space Dewpt Ctl Variable N/A AV 22 ReqOutsDprPos Requested Outside Air Damper Position % Open AV 23 RtnAirTemp_F Return Air Temperature in Fahrenheit ºF AV 24 OutsAirTemp_F Outside Air Temperature in Fahrenheit ºF AV 25 AirOffEvapTemp_F Air Off Evap Temperature in Fahrenheit ºF AV 26 SurfTemp_F Cold Surface Temperature in Fahrenheit ºF AV 27 PoolTemp1_F Pool Temperature 1 in Fahrenheit ºF AV 28 PoolTemp2_F Pool Temperature 2 in Fahrenheit ºF AV 29 SplyAirTemp_F Supply Air Temperature in Fahrenheit ºF AV 30 Cmpr1SucPrs Compressor 1 Suction Pressure PSI AV 31 Cmpr1DisPrs Compressor 1 Discharge Pressure PSI AV 32 Cmpr1SucTmp Compressor 1 Suction Temperature ºF AV 33 Cmpr1LiqTmp Compressor 1 Liquid Temperature ºF AV 34 Cmpr2SucPrs Compressor 2 Suction Pressure PSI AV 35 Cmpr2DisPrs Compressor 2 Discharge Pressure PSI AV 36 Cmpr2SuctTemp Compressor 2 Suction Temperature ºF AV 37 Cmpr2LiqTemp Compressor 2 Liquid Temperature ºF AV 38 Cmpr1SucSH Compressor 1 Suction Superheat ºF AV 39 Cmpr2SucSH Compressor 2 Suction Superheat ºF AV 40 Cmpr1LiqSC Compressor 1 Liquid Sub-cooling ºF AV 41 Cmpr2LiqSC Compressor 2 Liquid Sub-cooling ºF OBJECT TYPE OBJECT INSTANCE OBJECT NAME DESCRIPTION UNITS AV 1001 Cmpr1ActvFlt Cmpr System 1 Active Fault Code See Below AV 1002 Cmpr2ActvFlt Cmpr System 2 Active Fault Code See Below AV 1003 CmprStgsDesired Compressor Stages Desired Stages AV 1004 CmprStgsHtCool Cmpr Stages of Heating / Cooling Stages AV 1005 CmprstgsDpt Compressor Stages of Dehumidification Stages AV 1006 Spc1DprLim Damper Position Limit Code See Below AV 1007 Cmpr1FaultCount Cmpr System 1 Faults Since Powerup Faults AV 1008 Cmpr2FaultCount Cmpr System 2 Faults Since Powerup Faults AV 1009 RtnTempSetp_R Return Air Temp Set Point (Readable) ºF AV 1010 PoolTempSetp_R Pool 1 Temp Set Point (Readable) ºF AV 1011 PoolTemp2Setp_R Pool 2 Temp Set Point (Readable) ºF AV 1012 RtnRHSetp_R Return Air RH Set Point (Readable) % AV 1013 DprMinLimSetp_R Min Damper Limit Set Point (Readable) % Open 2017 PoolPak LLC. All rights reserved. Page 4

AV 1014 DprMaxLimSetp_R Max Damper Limit Set Point (Readable) % Open AV 1015 RtnTempSetp_W Return Air Temp Set Point (Writable) ºF AV 1016 PoolTempSetp_W Pool 1 Temp Set Point ºF (Writable) ºF AV 1017 PoolTemp2Setp_W Pool 2 Temp Set Point ºF (Writable) ºF AV 1018 RtnRHSetp_W Return Air RH Set Point (Writable) % AV 1019 DprMinLimSetp_W Min Damper Limit Set Point (Writable) % Open AV 1020 DprMaxLimSetp_W Max Damper Limit Set Point (Writable) % Open AV 1021 AuxAirHtStgs Aux Air Heat Stages Active Stages AV 1022 Cmpr1Mode Compressor System 1 Mode See Below AV 1023 Cmpr2Mode Compressor System 2 Mode See Below BV 1 WtrFlow1OK Cmpr System 1 Flow Switch Status On / Off BV 2 WtrFlow2OK Cmpr System 2 Flow Switch Status On / Off BV 3 OccMode Occupied Status On / Off BV 4 PurgeModeActv Purge Mode Status On / Off BV 5 Cmpr1ACCAllow Cmpr System 1 ACC Proof Status On / Off BV 6 Cmpr2ACCAllow Cmpr System 2 ACC Proof Status On / Off BV 7 AuxWtrHt1 Aux Pool Water Heater Status On / Off BV 8 AuxWtrHt2 Aux Pool Water Heater 2 Status On / Off BV 9 ForceOcc Force Occupied Mode (Writable) On / Off BV 10 ForceUnocc Force Unoccupied Mode (Writable) On / Off BV 11 ForcePurge Force Purge Mode (Writable) On / Off BV 12 ForceNoPurge Force Non-Purge Mode (Writable) On / Off BV 13 ActvAlmPres Active Alarm Present On / Off BV 14 NetMaster Indicates unit is master in multi-unit installation On / Off BV 15 ForceEvent Force System to Event Mode (Writable) On / Off BV 16 ForceNoEvent Force System to Non-Event Mode (Writable) On / Off COMPRESSOR ACTIVE FAULT CODE AV1001 and AV1002 are enumerated values indicating the most significant active fault in each compressor system of the dehumidifier. The present value for these objects can be decoded as follows: 0 Normal Operation - No Active Fault 1 Compressor System in OFF Mode 2 System Startup Active 3 Return Fan Not Running 4 Supply Fan Not Running 5 Fire Trip Active 2017 PoolPak LLC. All rights reserved. Page 5

6 Smoke Purge Active 7 Return Air Temp Out of Range (60 F < Normal < 105 F) 8 Both Fans Not Running 9 Freeze Alarm 11 Low Oil Pressure 13 Low Refrigerant Pressure 14 High Compressor Motor Temperature 15 High Refrigerant Pressure 16 Cmpr Current Transducer Failure 17 Crankcase Heater Breaker Off 50 Compressor Locked Out After 10 Faults DAMPER POSITION LIMIT CODE AV1006 is an enumerated value indicating the reason for any current limitations on damper position. These limitations override the normal damper control routine under certain conditions. The present value of this object can be decoded as follows: 0 Normal Damper Limits Apply 1 Fire Trip Active All dampers closed. 2 Smoke Purge Active Exhaust damper 100% open, Outside and Recirc 0% Open 3 Unoccupied and No Dew Point Override Active Mixing Box Allowed to Close to 0% 4 Flywheel AC Mode Active Mixing Box Allowed to Open to 100% during Unoccupied 5 Outside Air Temperature Less Than 50 F Outside Air Damper Position Limited 6 Cooling Required and Compressor Running 7 Heating or Dehumidification and Compressor Running 8 Supply Temperature Less Than 40 F Mixing Box Forced to 0% Open 9 Heating and Outside Air Temperature Less Than Air Off Evaporator Temperature 10 System Startup Active Mixing Box Held at 0% Open COMPRESSOR SYSTEM MODE AV1022 and AV1023 are enumerated values indicating the operation mode of the corresponding compressor system. The present value for these objects can be decoded as follows: 0 Compressor Off 1 Air Heating Mode 3 Pool Water Heating Mode 4 Air Cooling Mode CHANGING A SET POINT Two analog value objects are allocated for each set point, a readable value and a writable value. To change a set point, set the present value of the writable object to the new set point value. Verify that the controller accepted the change by reading the value of the corresponding readable object. The controller applies limits to the set point values. If the BAS tries to set an inappropriate value, the readable object will show the min or max allowed value instead of the requested value. The BAS can detect this event by verifying the change in the readable object s present value. The following limits are applied by the controller: 2017 PoolPak LLC. All rights reserved. Page 6

Return Air Temperature: 75ºF 95ºF Return Air Humidity: 40% - 65% Pool Water Temperature: 75ºF - 95ºF Damper Position: 0% - 100% Set points for temperature are represented by integer values in degrees Fahrenheit. CONTROLLING OCCUPANCY MODE The BAS can control the dehumidifier s occupancy mode directly. This control overrides all internal schedules. To force occupied mode, set the ForceOcc object value to the On state and the ForceUnocc object value to the Off state. To force unoccupied mode, set the value of the ForceOcc object to Off and the ForceUnocc object to On. CONTROLLING PURGE MODE The BAS can control the dehumidifier s Purge mode directly. This control overrides all internal schedules and controls except for the freeze protection algorithm. To force purge mode, set the ForcePurge object value to the On state and the ForceNoPurge object value to the Off state. To force non-purge mode, set the value of the ForcePurge object to Off and the ForceNoPurge object to On. ACTIVE ALARM FLAG CONTROL The ActvAlarmPres binary value object indicates the status of the system alarm flag. This status corresponds to the red light inside the alarm button of the control module, CM1. When the present value of this object is On, there is an uncleared alarm present in the controller. To clear the alarm flag, set the ActvAlarmPres object value to Off. If there are no active alarms present, the value of ActvAlarmPres will change to Off. If there are still active alarms present, the value of ActvAlarm will remain On. To determine the actual alarm condition, the BAS can examine the present value of the ActvFault objects. These enumerated values indicate the most significant active fault code. See the Compressor Active Fault Code section earlier in this document for a list of possible states. INTERFACE CARD FIELD SETUP AND CONFIGURATION The CM1 controller provides a the ability to change any of these settings. To make a change: 1. Press and hold the! (Alarm) and (Enter). Wait for the top line to display SYSTEM INFORMATION. 2. Arrow Down to put the cursor next to OTHER INFORMATION and press Enter. 3. Arrow down to place the cursor next to PCOWEB/NET CONFIG and press Enter. 4. Place the cursor next to PCONET settings and press Enter. 5. To change settings, including the Device Instance, and Station Address, continue to press the Enter button to tab through all changeable fields and use the Up/Down arrows to set the desired settings. 6. The last screen will say PCONET CONFIG ENABLE Update pconet? No. Change it to Yes then press Enter. 7. The screen should say PCONET CONFIG ENABLE Update complete. Reboot pconet to apply new setting. 8. Reboot the card by turning the Control Power Switch off. Wait about 20 seconds then turn the CPS on. 9. Wait approximately 5 minutes and then verify the new settings are saved on the card by repeating steps 1 through 7 above and viewing the setting match the changes that were made. 2017 PoolPak LLC. All rights reserved. Page 7

If you experience problems during this procedure, please contact PoolPak Service at (800)959-7725 Ext. 2. TROUBLESHOOTING SYMPTOM POSSIBLE CAUSE SOLUTION The dehumidifier cannot be seen on the BACnet network. The variable values sent by the controller are different than those shown on the RIU. The interface card is not properly connected to the network. Power to the controller is off. The BAS is trying to access the interface with the wrong device instance number. Incorrect setting of the BAS configuration parameters in the service menu. Correct network wiring. If safe to do so, turn on the main disconnect and the control power switch (CPS) in the control compartment of the dehumidifier. Follow the instructions in this document to set the instance number to a value appropriate for the BAS. Correct the parameter values to match the settings shown in this document. The variable values sent by the controller are different than those shown on the RIU. Set point changes are different than requested by the BAS. The BAS Type parameter is not set to BACnet. The LonWorks Board parameter is set to Yes. Requested set point change is outside of the acceptable range. Set the BAS Type parameter to BACnet. Set the LonWorks Board parameter to No. Select set points based on the acceptable range. For questions about the interface that are not answered in this document, please contact PoolPak Service at (800) 959-7725 Ext. 2. BACnet is a registered trademark of American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). This trademark is used in the text, but for the sake of readability, it is not individually marked. With more than 45 years of experience in indoor pool dehumidification equipment manufacturing, PoolPak LLC is the most well-known brand in the industry. Our people and products work daily to improve the quality and comfort of indoor pool environments. PoolPak dehumidification solutions include a variety of heating, ventilation, and air conditioning systems, in addition to an industry-leading PoolPak support network. For more information, please visit www.poolpak.com. 3491 Industrial Drive York, Pennsylvania 17402 USA 800-959-7725 Fax 717-757-5085 2017 PoolPak LLC. All rights reserved. Draft-SVW05-BACNET-MSTP-20170713