Factory Packaged Controls Coil Products Water Source Heat Pump Module Technical Guide RELAY CONTACT RATING IS 1 AMP MAX @ 24 VAC COMP. A1 ENABLE R1 COMP. A2 ENABLE R2 www.aaon.com COMP. B1 ENABLE R3 COMP. B2 ENABLE R4 ALARM OUTPUT RELAY COMMON R5 RC www.orioncontrols.com WSHP Module Orion No.: OE334-23-WPM-C AAON Coil No.: 30318 DIGITAL COMP. A1 & B1 NON-DIGITAL COMPRESSORS SUCT. PR. SENSOR +5V PRES 1=A1, PRES 2=N/A PRES PRES 3=B1, PRES 4=N/A GND AO1 AO2 CIRCUIT A -COMP. A1 CIRCUIT B - COMP.
PART NUMBER CROSS REFERENCE TABLE PART DESCRIPTION ORION AAON COIL WSHP Module R410 OE334-23-WPM-C 30318 WSHP Module R410 - 20% Glycol OE334-23-WPM-C20 30830 WSHP Module R410 - 40% Glycol OE334-23-WPM-C40 30831 VCM-X WSHP E-BUS Controller OE332-23E-VCMX-WSHP-C VCM-X WSHP Controller OE332-23-VCMX-WSHP-C 30526 VCM-X E-BUS Distribution Module OE365-23-EBD 30312 TBA www.aaon.com WattMaster Controls Inc.
Water Source Heat Pump Module Table of Contents OVERVIEW ........................................................................................................................................................ 4 Overview ......................................................................................................................................................................................4 Features ..................................................................................................
Water Source Heat Pump Module Module Overview Overview Features 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, or 12 Relay Expansion Module using the I2C port. See Figure 4 for wiring.
Water Source Heat Pump Module Installation & Wiring VCM-X WSHP to Water Source Heat Pump Module Wiring The VCM-X WSHP Controller communicates with the Water Source Heat Pump Module using the E-BUS Distribution Module. See Figure 4 for wiring details. For Stand Alone Applications, Connect To System Manager. For Network Applications Connect To Next Controller And/Or MiniLink PD On Local Loop.
Water Source Heat Pump Module Installation & Wiring CIRCUIT B SUCTION PRESSURE TRANSDUCER BK WH RD CIRCUIT A SUCTION PRESSURE TRANSDUCER BK WH RD OE334-23-WPM-C 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 RELAY CONTACT RATING IS 1 AMP MAX @ 24 VAC COMP. A1 ENABLE R1 COMP. A2 ENABLE R2 www.aaon.com COMP. B1 ENABLE R3 COMP. B2 ENABLE R4 ALARM OUTPUT RELAY COMMON R5 RC www.orioncontrols.
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 is configured properly for your application. Refer to the VCM-X Controller Technical Guide for more information.
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 Setpoints The Water Source Heat Pump Module setpoints are preset at AAON and are based on the unit’s design and type of coolant being used in the water loop. See Tables 3 & 4 for default settings.
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. Cool Enable On/Off A 24 volt signal on this input indicates the unit is in the Cooling 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 7 for more information about compressor staging. Compressor Operation (Heating and Cooling) A compressor can energize if the following is true: 1. There is 24 VAC applied to the appropriate Binary Input for the Compressor. 2. If two compressors are enabled simultaneously, a 5 second staging delay will occur. 3. Suction Pressure is above the Low Suction Pressure Cooling (Heating) Setpoint. 4.
Water Source Heat Pump Module Troubleshooting Safety Monitoring Proof of Flow Low Leaving Water Temperature NOTE: This safety monitoring is only performed in the Heat Mode. 1. If there is a call for a compressor and there is no Proof of Flow Input Enable: • The module will wait up to 3 minutes to activate the Proof of Flow Alarm LED(s) which will blink the code indicating failure. 2.
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 See the OE275-01 Suction Pressure Transducer, Pressure, Temperature, and Voltage Chart for R-410A Refrigerant testing (Table 6). The chart shows a temperature range from 20°F to 80°F. For troubleshooting purposes, the DC Voltage readings are also listed with their corresponding temperatures and pressures.
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.
Water Source Heat Pump Module Troubleshooting Suction Pressure Transducer LEDs LED Diagnostics “PRES 1 & 3” - There are LEDs for two of the Suction Pressure Transducers. Since each set of two compressors share 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 9 for PRES LED status descriptions. See Figure 6 for locations.
Water Source Heat Pump Module Notes Technical Guide 19
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