Factory Packaged Controls Water Source Heat Pump X Module Field Technical Guide YS102374 REV 0 WATTMASTER CONTROLS ALARM MADE IN USA M UP MENU ENTER www.aaon.com DOWN www.orioncontrols.com OE334-26-WSHPX-A WSHP-X MODULE NON-DIGITAL COMPRESSORS SUCT. PR. SENSOR +5V PRES 1=A1, PRES 2=A2 PRES PRES 3=B1, PRES 4=B2 GND +5 TO RED, PRES TO WHT & GND TO BLK DIGITAL COMRESSORS NOT USED PRES 1=A1, PRES 2=A2 PRES 3=B1, PRES 4=B2 +5 NOT USED, PRES TO P6 & GND TO P5 - COMP. A1 EN. - COMP. A2 EN. - COMP.
Table of Contents OVERVIEW ........................................................................................................................................................ 3 INSTALLATION AND WIRING ........................................................................................................................... 4 Environmental Requirements .......................................................................................................................................................
WSHP-X Module Module Overview Overview Features The OE334-26-WSHPX-A Water Source Heat Pump X (WSHP-X) 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.
WSHP-X Module Installation & Wiring Environmental Requirements Power Supply The WSHP-X 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 WSHP-X Module requires a 24 VAC power connection with an appropriate VA rating.
WSHP-X Module Installation & Wiring Important Wiring Considerations 5. All wiring is to be in accordance with local and national electrical codes and specifications. Please read carefully and apply the following information when wiring the WSHP-X Module: 6. Check all wiring leads at the terminal block for tightness. Be sure that wire strands do not stick out and touch adjacent terminals.
WSHP-X Module Installation & Wiring Stand-Alone Wiring Dual Water Circuit To operate the WSHP-X Module as Stand Alone, connect the Module to a 24 VAC power connection with an appropriate VA rating. See Figure 4 for wiring.
WSHP-X Module Installation & Wiring E-BUS to WSHP-X Module Wiring The WSHP-X Module connects to the E-BUS Distribution Module using a modular HSSC cable. The WSHP-X 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 (Dual Water Circuit only), SA Expansion Module (Dual Water Circuit only), or 12 Relay Expansion Module using the I2C port.
WSHP-X Module Installation & Wiring VCM-X WSHP to WSHP-X Module Wiring for Single Water Circuit The VCM-X WSHP Controller or SA Controller communicates with the WSHP-X Module using the E-BUS Distribution Module. See Figure 5 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.
WSHP-X Module Installation & Wiring CIRCUIT B SUCTION PRESSURE TRANSDUCER BK WH RD CIRCUIT A SUCTION PRESSURE TRANSDUCER BK WH RD OE334-26-WSHPX-A Water Source Heat Pump X 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 YS102374 REV 0 WATTMASTER CONTROLS ALARM MADE IN USA M YS102308 REV 1 I2C TO COMM DIST. BOARD UP MENU ENTER www.aaon.com +COMM DOWN www.orioncontrols.
WSHP-X Module Installation & Wiring VCM-X WSHP E-BUS or SA E-BUS Controller to WSHP-X Module Wiring for Single Water Circuit Any E-BUS Module can be connected to the E-BUS Controller’s E-BUS port or can be daisy-chained together using HSSC cables. NOTE: When using the WSHP-X Module, all compressors will be wired from the WSHP-X Module, not the VCM-X WSHP E-BUS Controller. The WSHP-X Module connects to the E-BUS Controller using a modular HSSC cable.
WSHP-X Module Installation & Wiring NOTE: Contact Factory for the correct HSSC cable length for your application. Cables are available in ¼, ½, 1, 2, 3, 4, and 5 Meter lengths and 100 and 150 Foot lengths. WARNING: Be sure all controllers and modules are powered down before connecting or disconnecting HSSC cables. For Stand Alone Applications, Connect To System Manager. For Network Applications Connect To Next Controller And/Or MiniLink PD On Local Loop.
WSHP-X Module Installation & Wiring VCM-X WSHP or SA Controller to WSHP-X Module Wiring for Dual Water Circuit NOTE: When using the WSHP-X Module, all compressors will be wired from the WSHP-X Module, not the VCM-X WSHP Controller or SA Controller. The VCM-X WSHP Controller or SA Controller communicates with the WSHP-X Module using the E-BUS Distribution Module. See Figure 7 for wiring details (VCM-X WSHP Controller shown). For Stand Alone Applications, Connect To System Manager.
WSHP-X 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 OE334-26-WSHPX-A Water Source Heat Pump X 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 YS102374 REV 0 WATTMASTER CONTROLS ALARM MADE IN USA M YS102308 REV 1 I2C TO COMM DIST.
WSHP-X Module Installation and Wiring VCM-X WSHP E-BUS or SA E-BUS Controller to WSHP-X Module Wiring for Dual Water Circuit Any E-BUS Module can be connected to the E-BUS Controller’s E-BUS port or can be daisy-chained together using HSSC cables. NOTE: When using the WSHP-X Module, all compressors will be wired from the WSHP-X Module, not the VCM-X WSHP E-BUS Controller or SA E-BUS Controller. The WSHP-X Module connects to the E-BUS Controller using a modular HSSC cable.
WSHP-X Module Installation and Wiring NOTE: Contact Factory for the correct HSSC cable length for your application. Cables are available in ¼, ½, 1, 2, 3, 4, and 5 Meter lengths and 100 and 150 Foot lengths. WARNING: Be sure all controllers and modules are powered down before connecting or disconnecting HSSC cables. For Stand Alone Applications, Connect To System Manager. For Network Applications Connect To Next Controller And/Or MiniLink PD On Local Loop.
WSHP-X 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 Series Controller or SA Series Controller is configured properly for your application.
WSHP-X Module Sequence of Operation General WSHP-X Module Setpoints The following inputs and outputs are available on the WSHP-X Module. See Table 2 below to reference the Input/Output Map. The WSHP-X Module setpoints are preset at AAON and are based on the unit’s design as well as the type of coolant being used in the water loop. See Tables 3 & 4 for default settings. Binary Inputs NOTE: These are default settings only. The setpoints may be different based on the unit’s design and coolant being used.
WSHP-X Module Sequence of Operation Glycol Default Setpoints R22 R410-A R410-A R410-A 0% 0% 5% 10% Glycol Glycol Glycol Glycol R410-A R410-A R410-A R410-A R410-A R410-A 15% 20% 25% 30% 35% 40% Glycol Glycol Glycol Glycol Glycol Glycol UNSAFE SUCTION 20 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG LOW SUCTION HEAT MODE 57 PSIG 100 PSIG 93 PSIG 87 PSIG 82 PSIG 75 PSIG 65 PSIG 58 PSIG 49 PSIG 45 PSIG LOW SUCTION COOL MODE 57 PSIG 87 PSIG 85 PSIG 85 PS
WSHP-X Module Sequence of Operation Modes of Operation NOTE: See the Unit Configurations Chart on page 16 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.
WSHP-X Module Navigation Keys LCD Display Screen & Navigation Keys Navigation Key Key Function MENU Use the MENU key to navigate through the Main Menu Screens UP Use this key to adjust setpoints and change configurations. This key is also used to turn Valve Force Mode on. DOWN Use this key to adjust setpoints and change configurations. This key is also used to turn Valve Force Mode off. ENTER Use the Enter key to move through screens within Main Menu categories.
WSHP-X Module Main Screens Map and WSHP Screens Main Screens Map WSHP Screens Refer to the following map when navigating through the LCD Main Screens. The first screen is the address screen. To scroll through the rest of the screens, press the
WSHP-X Module Alarm Screens Alarm Screens Refer to the following map when viewing the Alarm Screens. These screens will display automatically when alarms are present. ALARMS ALARMS The alarms are as follows: NO ALARMS: This will be shown if there are no current alarms. COMPRESSOR LOCKOUT (1-4): • If a circuit’s Suction Pressure falls below the Low Suction Pressure Setpoint for longer than one minute twice within a two hour window, the compressor on that circuit will be locked out.
WSHP-X Module System Status A Screens System Status A Screens Refer to the following map when navigating through the System Status A Screens. From the SYSTEM STATUS A Screen, press to scroll through the screens. PO FLOW YES or NO PROOF OF WATER FLOW SYSTEM STATUS A Status Screens shown below will scroll automatically if LCD display is left on this screen for 20 seconds.
WSHP-X Module System Status B Screens System Status B Screens Refer to the following map when navigating through the System Status B Screens. From the SYSTEM STATUS B Screen, press to scroll through the screens. H2O TEMP NO SENSR LEAVING WATER TEMPERATURE READING OR “NO SENSOR” SYSTEM B DISABLED If System B is disabled, the above screen will appear.
WSHP-X Module Setpoint Screens Setpoint Status Screens UNSAFESP 40 PSI Refer to the following map when navigating through the Setpoint Status Screens. From the SETPOINTS Screen, press to scroll through the screens. UNSAFE SUCTION PRESSURE SETPOINT NOTE: The following screens are Status Screens. The Setpoints can’t be changed from these screens. See Table below.
WSHP-X Module Troubleshooting Safety Monitoring for Single Water Circuit Proof of Flow 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. If the compressor(s) is (are) running and contact is opened for 2 seconds during Heat Pump Heating: • Low Leaving Water Temperature NOTE: This safety monitoring is only performed in the Heat Mode. 1.
WSHP-X Module Troubleshooting Safety Monitoring for Dual Water Circuit 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: Proof of Flow • That compressor will be locked out. 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.
WSHP-X 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. If the sensors still do not appear to be operating or reading correctly, check voltage and/or resistance to confirm that the sensor is operating correctly per the tables.
WSHP-X 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 80.00 149.42 2.
WSHP-X Module Troubleshooting Using LEDs to Verify Operation The WSHP-X 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.
WSHP-X 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-X Module will give a better indication of which compressor is causing an alarm. See Table 10 for PRES LED status descriptions. See Figure 11 for locations.
www.aaon.com 2425 So. Yukon Ave • Tulsa, OK 74107-2728 Ph: (918) 583-2266 • Fax: (918) 583-6094 AAON® Manual Part No.
