Factory Packaged Controls Tulsa Water Source Heat Pump Module Technical Guide RELAY CONTACT RATING IS 1 AMP MAX @ 24 VAC COMP. ENABLE R1 R1 COMP. A1 #1 ENABLE COMP. A2 ENABLE R2 R2 COMP. #2 ENABLE R3 COMP. B1 ENABLE COMP. #3 ENABLE R3 R4 COMP. B2 ENABLE COMP. #4 ENABLE R4 ALARM OUTPUT R5 RC RELAY COMMON RELAY COMMON RC NON-DIGITALCOMP COMPRESSORS NON-DIGITAL #1 THRU #4 SUCT. PR.
PART NUMBER CROSS REFERENCE TABLE PART DESCRIPTION ORION AAON VCM-X WSHP Module R410 OE334-23-WPM-A R88350 VCM-X WSHP Module R410 - 20% Glycol OE334-23-WPM-A20 R99750 VCM-X WSHP Module R410 - 25% Glycol OE334-23-WPM-A25 R88351 VCM-X WSHP Module R410 - 40% Glycol OE334-23-WPM-A40 R99760 VCM-X WSHP Module R22 OE334-23-WPM-22-A R90680 VCM-X WSHP E-BUS Controller OE332-23E-VCMX-WSHP-A V07140 VCM-X WSHP Controller OE332-23-VCMX-WSHP-A R90810 SA E-BUS Controller OE332-23E-SA-A V07160 SA
Water Source Heat Pump Module Table of Contents OVERVIEW ........................................................................................................................................................ 4 Overview ......................................................................................................................................................................................4 Features ..................................................................................................
Water Source Heat Pump Module Module Overview Overview The Water Source Heat Pump Module requires a 24 VAC power connection with an appropriate VA rating. The Water Source Heat Pump Module monitors the compressors on an AAON Water Source Heat Pump unit and can disable the compressors based on low Suction Pressure, Leaving Water Temperature, and Water Proof of Flow inputs. It also utilizes a Delay Timer to prevent the compressors from turning on at the same time.
Water Source Heat Pump Module Installation & Wiring Environmental Requirements Power Supply The Water Source Heat Pump Module needs to be installed in an environment that can maintain a temperature range between -30°F and 150°F and not exceed 90% RH levels (non-condensing). The Water Source Heat Pump Module requires a 24 VAC power connection with an appropriate VA rating.
Water Source Heat Pump Module Installation & Wiring Important Wiring Considerations 4. Be sure all modular wiring harness connectors are seated firmly in their respective modular connectors on the circuit board. Please read carefully and apply the following information when wiring the Water Source Heat Pump Module: 5. All wiring is to be in accordance with local and national electrical codes and specifications. 1.
Water Source Heat Pump Module Installation & Wiring E-BUS to Water Source Heat Pump Module Wiring The Water Source Heat Pump Module connects to the E-BUS Distribution Module using a modular HSSC cable. The Water Source Heat Pump Module requires a 24 VAC power connection with an appropriate VA rating. The E-BUS Distribution Module connects to the VCM-X WSHP Controller, VCM-X Expansion Module, SA Controller, SA Expansion Module, or 12 Relay Expansion Module using the I2C port. See Figure 4 for wiring.
Water Source Heat Pump Module Installation & Wiring VCM-X WSHP or SA Controller to Water Source Heat Pump Module Wiring NOTE: When using the WSHP Module, all compressors will be wired from the WSHP Module, not the VCM-X WSHP Controller or SA Controller. The VCM-X WSHP Controller or SA Controller communicates with the Water Source Heat Pump Module using the E-BUS Distribution Module. See Figure 4 for wiring details (VCM-X WSHP Controller shown). For Stand Alone Applications, Connect To System Manager.
Water Source Heat Pump Module Installation & Wiring CIRCUIT B2 SUCTION PRESSURE TRANSDUCER BK WH RD CIRCUIT B1 SUCTION PRESSURE TRANSDUCER BK WH RD CIRCUIT A2 SUCTION PRESSURE TRANSDUCER BK WH RD CIRCUIT A1 SUCTION PRESSURE TRANSDUCER BK WH RD OE334-23-WPM-A Water Source Heat Pump Module NOTE: ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY OE365-23-EBD E-BUS Distribution Module HVAC UNIT CONNECTIONS RELAY CONTACT RATING IS 1 AMP MAX @ 24 VAC COMP. A1 ENABLE R1 R1 COMP.
Water Source Heat Pump Module Start-Up & Commissioning General In order to have a trouble free start-up, it is important to follow a few simple procedures. Before applying power for the first time, it is very important to run through a few simple checks. One of the most important checks to make before powering up the system for the first time is to make sure that the VCM-X WSHP Controller or SA Controller is configured properly for your application.
Water Source Heat Pump Module Sequence of Operation General The following inputs and outputs are available on the Water Source Heat Pump Module. See Table 2 below to reference the Input/Output Map.
Water Source Heat Pump Module Sequence of Operation Stand-Alone Input Commands Compressor On/Off A 24 volt signal to Binary Inputs #1-4 initiates each Compressor’s On function. The source for this signal would typically come from Y1 to Y4 calls from the thermostat. Heat Enable On/Off A 24 volt signal on this input indicates the unit is in the Heating Mode. Typically, the source for this signal is the “O” call from the thermostat.
Water Source Heat Pump Module Sequence of Operation Modes of Operation NOTE: See Unit Configurations Chart on page 10 for more information about compressor staging. Digital Stage 1 / Digital Stage 2 On units with two Digital Scroll Compressors, the first compressor (A1) will be designated as Digital Stage 1 and the second compressor (A2) will be designated as Digital Stage 2.
Water Source Heat Pump Module Troubleshooting Safety Monitoring Proof of Flow There are separate inputs for System A and System B. System A provides water for Compressors A1 & A2 and System B provides water for Compressors B1 & B2. 2. If any Compressor’s Suction Pressure falls below the Low Suction Pressure Setpoint for longer than 1 minute a second time within a two hour window, then the following will occur: • That compressor will be locked out. • Alarm LED will indicate a Compressor Lockout.
Water Source Heat Pump Module Troubleshooting Temperature Sensor Testing The following sensor voltage and resistance tables are provided to aid in checking sensors that appear to be operating incorrectly. Many system operating problems can be traced to incorrect sensor wiring. Be sure all sensors are wired per the wiring diagrams in this manual.
Water Source Heat Pump Module Troubleshooting Temperature °F Pressure PSI Signal DC Volts Temperature °F Pressure PSI Signal DC Volts 20.00 31.13 1.0 55.32 93.39 2.0 20.00 37.36 1.1 58.86 99.62 2.1 20.46 43.58 1.2 62.13 105.84 2.2 25.71 49.80 1.3 65.27 112.07 2.3 30.84 56.03 1.4 68.42 118.29 2.4 35.41 62.26 1.5 71.39 124.52 2.5 39.98 68.49 1.6 75.20 130.75 2.6 44.00 74.71 1.7 77.00 136.97 2.7 48.00 80.94 1.8 79.80 143.20 2.8 51.78 87.16 1.9 80.
Water Source Heat Pump Module Troubleshooting Using LEDs to Verify Operation The WSHP Module is equipped with LEDs that can be used to verify operation and perform troubleshooting. There are LEDs for communication, operation modes, diagnostic codes, and relays. The Module has twenty LEDs—one used for power, one used for communications, one used for operation status, one used for alarms, five used for compressor relays, four used for Suction Pressure Transducer status, and seven used for Binary Input status.
Water Source Heat Pump Module Troubleshooting Suction Pressure Transducer LEDs LED Diagnostics “PRES 1-4” - There are LEDs for each of the Suction Pressure Transducers. Since each compressor has a sensor, these LEDs which are located on the top left of the WSHP Module will give a better indication of which compressor is causing an alarm. See Table 10 for PRES LED status descriptions. See Figure 6 for locations.
Water Source Heat Pump Module Notes Technical Guide 19
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