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Related Manuals for AAON RSMD2R
Summary of Contents for AAON RSMD2R
- Page 1 RSMD2R Technical Guide...
- Page 2 Rev. C, January 19, 2024 Updated Dehumidification Sequence Rev. D, February 2, 2024 Added WSHP Valve Control to Sequence RSMD2R PARTS REFERENCE PART DESCRIPTION PART NUMBER Refrigerant System Module for Digital Compressors ( RSMD2R) ASM02869 VCCX-IP Controller ASM07424 VCCX2 Controller ASM01698 Prism 2...
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Page 3: Table Of Contents
TABLE OF CONTENTS OVERVIEW ..............................5 RSMD2R Overview ..............................5 Dimensions ................................6 INSTALLATION AND WIRING ........................7 Electrical Environmental Requirements ........................7 WIRING ............................... 8 Inputs ..................................8 Outputs ................................... 9 INPUTS AND OUTPUTS ......................... 10 Inputs/Outputs Map ............................... 10 Input and Output Descriptions ..........................11... - Page 4 Single Condenser Per RSMD2R Module Wiring Figure 8: ....................30 Prism 2 Condenser Configuration: Single Condenser Per Module Figure 9: ..............31 Single Condenser Per Two RSMD2R Modules Wiring Figure 10: ..................32 Prism 2 Condenser Configuration: Single Condenser Per Two Modules Figure 11: ............33...
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Page 5: Overview
3. Reheat is present on the second circuit only. The RSMD2R is connected to the VCCX2 Controller. Up to four RSMD2R’s can be connected, depending on the size of the system. There are two E-BUS Expansion Ports which allow the use of communicating sensors and the E-BUS Modules. -
Page 6: Dimensions
EMER SHDN OBSERVED OR THE CONTROLLER COMP DIS 1 WILL BE COMP DIS 2 DAMAGED LEAVING H20 E-BUS DUAL E-BUS LABEL P/N: R+ SHD T- G088060 EXPANSION 4.10 0.75 0.74 0.52 1.50 1.50 1.33 Figure 1: RSMD2R Dimensions RSMD2R Technical Guide... -
Page 7: Installation And Wiring
The main unit controller and modules are factory installed 2. All 24 VAC wiring must be connected so that all ground and wired at the AAON factory. Some of the following information wires remain common. Failure to follow this procedure may not apply to your installation if it was pre-wired at the factory. -
Page 8: Wiring
The saturated refrigerant temperature is used to properly control the compressors to maintain a given Suction Coil (Saturated) The RSMD2R is connected to the VCCX2 Controller. Up to four Temperature Setpoint. In Cooling mode, the VCCX2 resets the RSMD2R’s can be connected, depending on the size of the system. -
Page 9: Outputs
18-30 a split system. 3 Y1 Belimo actuator wiring Size transformer for Line Voltage shown. Consult factory for correct total load. other manufacturer wiring RSMD2R = 18 VA instructions. Figure 3: RSMD2R Outputs Wiring RSMD2R Technical Guide... -
Page 10: Inputs And Outputs
(2-10 VDC) (AOUT2) Relay Outputs (24 VAC) Compressor 1 Enable Relay (RLY1) Compressor 2 Enable Relay (RLY2) Condenser 1 Enable Relay (RLY3) Condenser 1 Enable Relay (RLY4) Reversing Valve Relay (RLY5) Table 2: RSMD2R Inputs and Outputs RSMD2R Technical Guide... -
Page 11: Input And Output Descriptions
INPUTS AND OUTPUTS Input and Output Descriptions RSMD2R - Inputs & Outputs BIN3 - Outside Coil Temperature / Proof of Water Flow Status +5V VDC Power This input can be used for the following two options: This output is a 5 VDC output that supplies power to the Suction Air to Air Heat Pump Pressure Transducers. -
Page 12: Sequence Of Operations
Coil Suction (Saturated) Temperature Setpoint. Minimum off times must also be met before compressors can stage on. The RSMD2R can monitor a Head Pressure Transducer and control a Condenser Fan to maintain a Head Pressure Setpoint. The RSMD2R In units with multiple digital compressors, if the 1st digital must be configured for an Air Cooled Condenser. -
Page 13: Lcd Screens
Use this key to adjust setpoints and change configurations. ENTER Use the ENTER key to navigate through the Main Menu Screen categories. MENU ENTER Table 3: Navigation Key Functions DOWN Figure 4: LCD Display and Navigation Keys RSMD2R Technical Guide... -
Page 14: Screen Map
H2O FLOW LOW SUCT or if configured 95 PSI for water source heat pump H2O TEMP LOW H2O XX F 37 F If configured for air to air heat pump, the following screen displays DEFR INT 30 MIN RSMD2R Technical Guide... -
Page 15: Screen Descriptions
LCD SCREENS Screen Descriptions Main Screens Module Screens Refer to Table 4, this page, when navigating through the LCD Refer to Table 5, this page, when navigating through the RSMD2R Main Screens. Screens. From the RSMD2R Screen, press to scroll <ENTER>... -
Page 16: Table 6: System Status Screens
Defrost interval timer in number of minutes 10 MINS Water flow. Options are: H2O FLOW This screen appears instead of the defrost interval timer If the system is configured with a water source heat pump, Table 6: System Status Screens RSMD2R Technical Guide... -
Page 17: Table 8: Alarms Screens
No Alarms. This is shown if there are no current alarms. ALARMS EBUS Slave Timeout. This alarm indicates communication has been lost between the RSMD2R and the controller or other EBUS SLV E-BUS modules that may be connected. This can be the result of a bad cable, a missing cable, or the module not being TIMEOUT configured properly. -
Page 18: Table 9: Alarm History Screens
Appears if configured for water source heat pump. Defrost Interval Setpoint Status. Default is 30 minutes. DEFR INT 30 MIN Appears if the system is configured for air to air heat pump. Table 10: Setpoint Status Screens RSMD2R Technical Guide... -
Page 19: Protected Screen Map
LCD SCREENS Protected Screen Map Protected Screens Map Refer to the following map when navigating through the LCD Protected Screens. From the RSMD2R Screen, press twice to get <ENTER> to the SOFTWARE Screen. Then hold the button for five seconds. To scroll through the rest of the screens, press the button. -
Page 20: Protected Screen Descriptions
DIAGNOSTIC SCREENS CONFIG Screen Text Description CONFIG Diagnostic screens COND FAN Condenser Fan. Locked or unlocked LOCKED COND FAN LOCK POS Condenser fan locked position. LOCKED 100% Table 11: Configuration Screens LOCK POS 100% RSMD2R Technical Guide... -
Page 21: Table 12: Diagnostic Screens
X.XX AOUT-2 V Condenser Signal 2 Force. 0.0 to 10.0 = Active Force Mode. Press the buttons <UP> <DOWN> to increase and decrease the value. BIN 1 Table 12: Diagnostic Screens RSMD2R Technical Guide... - Page 22 • 3 = C for more information. • 4 = D The number in parentheses is the E-BUS address. • Module 1 is 152 • Module 2 is 153 • Module 3 is 154 • Module 4 is 155 RSMD2R Technical Guide...
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Page 23: Troubleshooting
- This LED will light up to indicate that 24 VAC power POWER has been applied to the controller. The RSMD2R is equipped with LEDs that can be used to verify Binary Input LEDs operation and perform troubleshooting. There are LEDs for communication, operation modes, and diagnostic codes. -
Page 24: Suction Pressure Transducer Testing
Suction Line of the Compressor. Use the voltage column to check the Suction Pressure Transducer while connected to the RSMD2R Module(s). The VCCX2 and the RSMD2R Module(s) must be powered for this test. Read voltage with a meter set on DC volts. Place the positive lead from the 21.19... -
Page 25: Copeland ® Discharge Thermistor Temperature Sensor Testing
1.80 0.76 56.16 4.24 1.59 0.68 45.81 4.10 1.39 0.61 37.58 3.94 1.25 0.55 30.99 3.77 1.12 0.50 25.68 3.59 1.01 0.45 21.40 3.40 0.92 0.42 17.91 3.20 0.83 0.38 15.07 3.00 Table 14: Discharge Thermistor Temperature/Resistance RSMD2R Technical Guide... -
Page 26: Temperature Sensor Testing
3317 1.246 12191 2.746 57.2 3015 1.159 20.6 11906 2.717 2743 1.077 21.1 11652 2.691 62.7 2502 1.001 21.7 11379 2.661 65.6 2288 0.931 Table 15: 0-5V Temperature Sensor - Voltage & Resistance for Type III Sensors RSMD2R Technical Guide... -
Page 27: Head Pressure Transducer
If you suspect there is a problem related to the head pressure transducer, measurements can be taken at the HP terminal. See Table 7, this page. HEAD PRESSURE TRANSDUCER CHART Voltage Pressure Voltage Pressure Table 16: Head Pressure Transducer Chart RSMD2R Technical Guide... -
Page 28: Appendix A: Condenser Options
R+ SHD T- G088060 EXPANSION Connects to VCCX2 Loop Communications connector when used on 18-30 a split system. Size transformer for Line Voltage correct total load. RSMD2R = 18 VA Figure 6: Default: Two Condenser RSMD2R Module Wiring RSMD2R Technical Guide... -
Page 29: Figure 7: Prism 2 Condenser Configuration: Default Two Condenser Operations
Condenser Options 2 Cond per RSMD2R USE < or > TO CHANGE Select the “2 Condensers per RSMD2R” option on the above Hand Held Service Tool Screen. HVAC Unit Application The Two Condenser per RSMD2R configuration is used with the following HVAC units: •... -
Page 30: Single Condenser Per Module
R+ SHD T- EXPANSION G088060 Connects to VCCX2 Loop Communications connector when used on 18-30 a split system. Size transformer for Line Voltage correct total load. RSMD2R = 18 VA Figure 8: Single Condenser Per RSMD2R Module Wiring RSMD2R Technical Guide... -
Page 31: Figure 9: Prism 2 Condenser Configuration: Single Condenser Per Module
Single Condenser Per Module Figure 9: Prism 2 Condenser Configuration: Single Condenser Per Module RSMD2R Main Configuration Screen #2 - Condenser Options Select the “1 Condenser for 1 RSMD2R” option on the above Hand Held Service Tool Screen. RSMD2R CONFIGURATION Condenser Options 1 Cond for 1 RSMD2R USE <... -
Page 32: Single Condenser Per Two Modules
Note: If there are four modules, Size transformer for 1 and 3 match and 2 and 4 Line Voltage correct total load. match. RSMD2R = 18 VA Figure 10: Single Condenser Per Two RSMD2R Modules Wiring RSMD2R Technical Guide... -
Page 33: Figure 11: Prism 2 Condenser Configuration: Single Condenser Per Two Modules
APPENDIX A: CONDENSER OPTIONS Single Condenser Per Two Modules Figure 11: Prism 2 Condenser Configuration: Single Condenser Per Two Modules RSMD2R Main Configuration Screen #2 - Condenser Options RSMD2R CONFIGURATION Condenser Options 1 Cond for 2 RSMD2Rs USE < or > TO CHANGE Select the “1 Condenser for 2 RSMD2Rs”... -
Page 34: Single Condenser For Three Modules
Note: If there are four modules, Size transformer for 1 and 3 match and 2 and 4 Line Voltage correct total load. match. RSMD2R = 18 VA Figure 12: Single Condenser for Three RSMD2R Modules Wiring RSMD2R Technical Guide... -
Page 35: Figure 13: Prism 2 Condenser Configuration: Single Condenser For Three Modules
APPENDIX A: CONDENSER OPTIONS Single Condenser for Three Modules Figure 13: Prism 2 Condenser Configuration: Single Condenser for Three Modules RSMD2R Main Configuration Screen #2 - Condenser Options RSMD2R CONFIGURATION Condenser Options 1 Cond for 3 RSMD2Rs USE < or > TO CHANGE Select the “1 Condenser for 3 RSMD2Rs”... -
Page 36: Two Condensers Per Two Modules
DUAL E-BUS LABEL P/N: R+ SHD T- EXPANSION G088060 Connects to VCCX2 Loop Communications connector when used on 18-30 a split system. Size transformer for Line Voltage correct total load. RSMD2R = 18 VA Figure 14: A1/B1 Wiring RSMD2R Technical Guide... -
Page 37: Figure 15: A2/B2 Wiring
DUAL E-BUS LABEL P/N: R+ SHD T- EXPANSION G088060 Connects to VCCX2 Loop Communications connector when used on 18-30 a split system. Size transformer for Line Voltage correct total load. RSMD2R = 18 VA Figure 15: A2/B2 Wiring RSMD2R Technical Guide... -
Page 38: Figure 16: Prism 2 Condenser Configuration: A1/B1 And A2/B2 Condenser Configuration
APPENDIX A: CONDENSER OPTIONS Two Condensers Per Two Modules Figure 16: Prism 2 Condenser Configuration: A1/B1 and A2/B2 Condenser Configuration RSMD2R Main Configuration Screen #2 - Condenser Options Select the “2 Condensers for 2 RSMD2Rs” option on the above Hand Held Service Tool Screen. -
Page 39: On/Off Condenser Options
Compressors. This can also be selected when No Head Pressure Control is required. Select this option if the Condenser Fan cycles On/Off based on the Fan Cycle Head Pressure Setpoints. Figure 17: Prism 2 Condenser Configuration: ON/OFF Condenser Options RSMD2R Technical Guide... - Page 40 PARTS: For replacement parts, please contact your local AAON Representative. 2425 South Yukon Ave • Tulsa, OK • 74107-2728 Ph: (918) 583-2266 • Fax: (918) 583-6094 AAON P/N: G088350, Rev. D Printed in the USA • Copyright February 2024 • All Rights Reserved...