Advertisement
Quick Links
Advertisement
Subscribe to Our Youtube Channel
Related Manuals for AAON RM454-Z
Summary of Contents for AAON RM454-Z
- Page 1 Compatible with VCCX-454 Series RM454-Z Technical Guide ASM02351 Software SS1194...
- Page 2 This manual is available for download from www.aaon.com AAON, Inc. It is the intent of AAON to provide accurate and current product 2425 South Yukon Ave. information. However, in the interest of product improvement, AAON Tulsa, OK 74107-2728 reserves the right to change pricing, specifications, and/or design of its Factory Technical Support Phone: 918-382-6450 product without notice, obligation, or liability.
-
Page 3: Table Of Contents
Input/Output Maps ..............................9 WIRING ................................10 RM454-Z Inputz Wiring - Modules 1, 2, 4, and 5 ....................10 RM454-Z Output Wiring - Modules 1, 2, 4, and 5 ....................11 RM454-Z Input Wiring - Modules 3 and 6 ......................12 RM454-Z Output Wiring - Modules 3 and 6 ...................... - Page 4 FIGURES Figure 1: RM454-Z Dimensions ..........................7 Figure 2: RM454-Z Inputs Wiring - Modules 1, 2, 4, and 5 ..................10 Figure 3: RM454-Z Outputs Wiring - Modules 1, 2, 4, and 5 ..................11 Figure 4: RM454-Z Inputs Wiring - Modules 3 and 6 ....................12 Figure 5: RM454-Z Outputs Wiring - Modules 3 and 6 ...................13...
- Page 5 RM454-Z Sensor Status Screens ......................24 Table 9: RM454-Z Setpoint Status Screens ......................24 Table 10: RM454-Z Alarms Screens ........................25 Table 11: RM454-Z Faults Screens ......................... 25 Table 12: RM454-Z Lockouts Screens ........................26 Table 13: RM454-Z Danfoss Screens ........................27 Table 14: RM454-SC Main Screens .........................
-
Page 6: General Information
The Refrigerant System Module for VFD Compressors (RM454-Z) monitors and controls one refrigeration circuit of the HVAC unit. The RM454-Z is used on RZ units and on RN-E units with Danfoss compressors. The RM454-Z is connected to an AAON unit controller. Three or six RM454-Z Modules can be connected, depending on the size of the system. -
Page 7: Dimensions
24 VAC POWER ONLY WARNING! POLARITY MUST BE OBSERVED MODBUS DUAL OR THE CONTROLLER LABEL P/N: E-BUS WILL BE DAMAGED G152060 AOUT1 AOUT2 4.10 Note: All Dimensions are in inches. Note: Depth is 1.50 inches. Figure 1: RM454-Z Dimensions RM454-Z Technical Guide... -
Page 8: Installation And Wiring
Please carefully read and apply the following information when wiring the unit controller, RM454-Z, and any associated module. Correct wiring of the AAON unit controller and its modules is 1. All wiring is to be in accordance with local and national the most important factor in the overall success of the controller electrical codes and specifications. -
Page 9: Inputs And Outputs
INPUTS AND OUTPUTS Input/Output Maps for the RM454-Z Module inputs and outputs, Table 2, this page SUBCOOL MONITOR MODULE for Subcool Monitor Module inputs and outputs, Table 3, this page for the Reheat Expansion Module inputs Table 4, this page Analog Inputs and outputs. -
Page 10: Wiring
Temperature sensor are only needed if TXVs are The RM454-Z monitors and controls one refrigeration circuit of the installed instead of EXVs. HVAC unit. The RM454-Z is used on RZ units and on RN-E units with Danfoss compressors. The module is designed for R410-A refrigerant. -
Page 11: Rm454-Z Output Wiring - Modules 1, 2, 4, And 5
AOUT2 18-30 Size transformer for correct total load. RM454-Z = 18 VA Line Voltage Danfoss VFD Terminals Connect to AAON unit controller and next RSMZ Figure 3: RM454-Z Outputs Wiring - Modules 1, 2, 4, and 5 RM454-Z Technical Guide... -
Page 12: Rm454-Z Input Wiring - Modules 3 And 6
LABEL P/N: OR THE CONTROLLER E-BUS WILL BE DAMAGED G152060 AOUT1 AOUT2 18-30 Condenser Fan Size transformer for correct total load. Line Voltage RM454-Z = 18 VA Figure 4: RM454-Z Inputs Wiring - Modules 3 and 6 RM454-Z Technical Guide... -
Page 13: Rm454-Z Output Wiring - Modules 3 And 6
Note: For RSMZ Module #3, connect to Reheat Expansion Module #1 Comm Terminal Block. For RSMZ Module #6, connect to Reheat Expansion Module #2 Comm Terminal Block. Figure 5: RM454-Z Outputs Wiring - Modules 3 and 6 RM454-Z Technical Guide... -
Page 14: Reheat Expansion Module
Reheat Expansion Module Wiring Please refer to the MHGRV-X Technical Guide for NOTE: more information. The Reheat Expansion Module connects to the RM454-Z Communication Terminal Block. One or two Reheat Expansion Modules are used per system. Observe Polarity! All boards must be wired... -
Page 15: Rm454-Sc (Subcool Monitor) Module
Line Temperature Sensors to calculate subcooling. This module can be configured to work with R454-B refrigerant. The Subcool Monitor Module is connected to the AAON unit controller. One or two Subcool Monitor Modules can be connected, depending on the size of the system. -
Page 16: Sequence Of Operations
RM454-Z Module 1 and that module will then share the mode change with the other RM454-Z Modules so that all modules will operate in the same mode. If RM454-Z Module 1 goes off line for any reason, then DX coil operations will be stopped for the entire unit. -
Page 17: Alarms
These • Parameter 16-90 Alarm Word 1 failures (alarms) will be reported to the AAON unit controller which “DNFSALM1” allows them to be monitored via a BACnet® Building Automation System or with a user interface. -
Page 18: Alarm Faults
The low superheat detection will be ignored for the first two minutes of initial compressor operation. If the superheat drops below 4ºF for two minutes, the compressor signal will be turned off and will be retried after five minutes. RM454-Z Technical Guide... -
Page 19: Alarm Lockouts
High Discharge Line Temperature Lockout If a high Discharge Line Temperature fault occurs three times in a two-hour time period, the circuit will be disabled and locked out until the module is reset. RM454-Z Technical Guide... -
Page 20: Subcool Monitor Module Operation
The use of the RM454-SC is optional. Subcooling Sequence The RM454-SC reads and scales all of its six inputs and calculates the saturated suction and subcooling for each configured circuit. RM454-Z Technical Guide... -
Page 21: Lcd Screens
Use this key to adjust setpoints and change configurations. DOWN Use this key to adjust setpoints and change configurations. ENTER Use the ENTER key to navigate through the Main Menu Screen categories. Table 5: Navigation Key Functions RM454-Z Technical Guide... -
Page 22: Rm454-Z Screens Map
LCD SCREENS RM454-Z Screens Map RM454-Z STATUS SENSOR SETPOINT ALARM ALARM ALARM DANFOSS 1194VXXX MENU MENU STATUS WARNINGS FAULTS LOCKOUTS MENU EBUS COMM MODE SUPPLY SUPPLYSP CONNECT? ° ° +XXXXXX XX.X XX.X YES/NO SOFTWARE STAGE SATURATN EVAPCLSP MB FAIL °... -
Page 23: Rm454-Z Screen Descriptions
Module 6’s address is 182 C1MIN OFF Compressor 1 minimum off time TONNAGE Unit tonnage C2MIN OFF Compressor 2 minimum off time VFD MAX Maximum speed based on unit tonnage Table 7: RM454-Z System Status Screens Table 6: RM454-Z Main Screens RM454-Z Technical Guide... -
Page 24: Table 8: Rm454-Z Sensor Status Screens
Discharge temperature reading from input SHEAT SP Superheat setpoint XX.X°F XX.XºF SUCTION Suction pressure reading from input Table 9: RM454-Z Setpoint Status Screens XXX PSIG SUPRHEAT Superheat reading from temperature sensor XX.XºF input Table 8: RM454-Z Sensor Status Screens RM454-Z Technical Guide... -
Page 25: Rm454-Z Alarms, Faults, And Lockouts
LCD SCREENS RM454-Z Alarms, Faults, and Lockouts Lockouts Screens FAULTS SCREENS Screen Text Description If an alarm, fault, or lockout is present, the ALARM LED above ALARM Alarm Faults screens the LCD display lights up red and blinks. The alarms, faults, and... -
Page 26: Table 12: Rm454-Z Lockouts Screens
LCD SCREENS RM454-Z Alarms, Faults, and Lockouts Lockouts Screens If an alarm, fault, or lockout is present, the ALARM LED above the LCD display lights up red and blinks. The alarms, faults, and lockouts scroll automatically from their respective screen when more than one message is present. -
Page 27: Rm454-Z Danfoss Screens
NO ALARM DNFSALM1 Danfoss 1 alarms. B1-B4 codes B1XX-B4XX DNFSALM2 Danfoss 2 alarms. B1-B4 codes B1XX-B4XX CURRENT Current OA C1 HOURS Compressor 1 hours VFD HRS VFD hours MODEL Danfoss model part number Table 13: RM454-Z Danfoss Screens RM454-Z Technical Guide... -
Page 28: Rm454-Sc (Subcool Monitor) Screens Map
XXX PSIG XXX PSIG XXX PSIG REFRGRNT ADDRESS SATTEMP # SATTEMP # SATTEMP # ° ° ° X (XXX) XXX.X XXX.X XXX.X TRNSDCER TEMP # TEMP # TEMP # ° ° ° PSIG XXX.X XXX.X XXX.X CIRCUITS 1,2,3 RM454-Z Technical Guide... -
Page 29: Rm454-Sc (Subcool Monitor) Module Screen Descriptions
2 is for the second 3 circuits Table 15: RM454-SC Circuit Status Screens Number in parentheses is E-BUS address. Module 1’s address is 169, Module 2’s address is 170. Table 14: RM454-SC Main Screens RM454-Z Technical Guide... -
Page 30: Table 16: Rm454-Sc Main Screens
COMM This alarm will display if the Subcool Monitor is not TMPSCALE Temperature scaling. Fahrenheit or Celsius TIMEOUT communicating with the AAON unit controller. REFRGRNT Refrigerant type. 410-A, 134a, or R22 Table 16: RM454-SC Main Screens TRNSDCER Transducer PSIG. 250, 500, or 667... -
Page 31: Appendix A: Troubleshooting
Every time the module receives a valid E-BUS request COMM - from the AAON unit controller, this LED will blink on and then off, signifying that it received a valid request and responded. This LED will light up to indicate that 24 VAC power POWER - has been applied to the module. -
Page 32: Rm454-Sc (Subcool Monitor) Led Diagnostics
Every time the module receives a valid E-BUS request COMM - from the AAON unit controller, this LED will blink on and then off, signifying that it received a valid request and responded. If the software is running, this LED should blink once STATUS - every 10 seconds. -
Page 33: Reheat Expansion Module Led Diagnostics
REHEAT ENABLE LED POWER LED POWER LED REHEAT ENABLE LED COND/REHEAT BLACK WHITE RED/GRN GRN/RED STATUS COMM YS102608 R0 STLZ STATUS 4750 COMM 4750 STATUS LED STATUS COMM COMM LED Figure 11: Reheat Expansion LED Locations and Descriptions RM454-Z Technical Guide... -
Page 34: Temperature Sensor Testing
Note: If the voltage is above 5.08 VDC the sensor or wiring is “open.” If the voltage is less than 0.05 VDC, the sensor or wiring is shorted. Table 20: 0-5V Temperature Sensor - Voltage and Resistance for Type III Sensors RM454-Z Technical Guide... -
Page 35: Suction Pressure Transducer Testing
80.94 while connected to the RM454-Z Module. The VCCX-454 and 27.80 87.16 the RM454-Z Module must be powered for this test. Read voltage with a meter set on DC volts. Place the positive lead from the 30.17 93.39 meter on the SP1/SP2 terminal located on the RM454-Z Module 33.40... -
Page 36: Liquid Line And Head Pressure Transducer
Head Pressure Transducer Testing Use the voltage column to check the Head Pressure Transducer while connected to the RM454-Z Module. The module must be powered for this test. Read voltage with a meter set on DC volts. Place the positive lead from the meter on the HP input terminal located on the module. -
Page 37: Appendix B: Danfoss Vfd
0-20 Motor Speed Unit RPM (vs. Hz) blue = user must configure from display yellow = set through communications once communications is established green = default but confirm if not working Table 23: Danfoss VFD Parameter Configurations RM454-Z Technical Guide... -
Page 38: Appendix C: System Configuration
In Prism 2’s “Configuration 1 Page”, select the radio button for this configuration will need to be selected. “Check this box for RM454-Z modules”, select the radio button for “3 Circuit 1 Sub-Cool” or “6 Circuit 2 Sub-Cool”, and then select the check box for “RM454-Z Has Sub-Cooling Module”... - Page 39 Single Condenser for A & B. If there is single condenser other VFD compressor will activate. control for the system then select Single Condenser for the system. Modulating HPC Setpoint Enter the head pressure setpoints used for cooling and dehumidication modes. RM454-Z Technical Guide...
- Page 40 PARTS: For replacement parts, please contact your local AAON Representative. 2425 So. Yukon Ave • Tulsa, OK • 74107-2728 Ph: (918) 583-2266 • Fax: (918) 583-6094 Rev. A Created in the USA • © September 2024 AAON All Rights Reserved...
Need help?
Do you have a question about the RM454-Z and is the answer not in the manual?
Questions and answers