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Summary of Contents for Nordic RS Series
- Page 1 Application, Installation, & Service Manual RS-Series Liquid to Air Split Geothermal Heat Pump Two-Stage, R454b, GEN2 Model Sizes 45-75 Maritime Geothermal Ltd. info@nordicghp.com P.O. Box 2555, 170 Plantation Road www.nordicghp.com Petitcodiac, NB E4Z 6H4 002742MAN-01 (506) 756-8135 1-May-2025...
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Page 2: General Safety Precautions
Search for any topic: LOOK FOR GREY TEXT BOXES LIKE THIS ONE THROUGHOUT MANUAL FOR A2L-SPECIFIC WARNINGS / INSTRUCTIONS. refrigerant: mildly flammable. Installation and service work should only be performed by properly certified technicians with A2L-specific training. See also Service Procedures chapter. - Page 3 Search for any topic: Model Nomenclature RS—65—HACW—X—1T—C—xx Series: Revision: RS = liquid to air split heat pump 01, 02 etc. Nominal Size: Outdoor Loop Exchanger: 45 = 030 compressor C = Copper coaxial coil 55 = 040 compressor Y = CuNi coaxial coil & piping 65 = 051 compressor Z = CuNi coaxial coil only 75 = 060 compressor...
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Page 4: Table Of Contents
Search for any topic: Table of Contents Tables & Documents Pipe Insulation 000608INF - Typical Horiz. Ground Loop Configuration RS-Series System Description 000609INF - Typical Vert. Ground Loop Configuration General Overview 000906CDG - Circulator Pump Module Installation 1. Heating Mode 001823CDG - Dual Flow Pump Module Installation 2. -
Page 5: Tables & Documents
Table A4 - Control Board Connector Descriptions (Right Side) 002823CDG - Typical RS-Series Wiring Connections (Gen2) Documents 002516PDG - Typical Piping/Duct Connections - RS Series 000970PDG - Desuperheater Connection to DHW Pre-Heat Tank 002384PDG - Desuperheater Connection to DHW Pre-Heat Tank - Multiple Units... -
Page 6: Rs-Series System Description
(AHH-series) or vertical (AHV-series). standard. The blower motor is a premium constant-airflow Third party air handlers can also be used with the Nordic RS- ECM. The outdoor loop refrigerant to water heat exchanger is a series compressor unit; but to ensure good performance and full heavy duty coaxial copper / steel model, with optional CuNi in- warranty, Nordic air handlers are recommended. -
Page 7: Rs-Series Sizing
Search for any topic: RS-Series Sizing Heat Pump Sizing Some background on Standard Capacity Ratings: closed ground loops are normally designed to reach a minimum tem- The following table is a rough guideline as to the size of perature of just below freezing at the end of the heating season, space each heat pump size can handle for ground loop in order to take advantage of the latent heat of groundwater (at (closed loop) installations. -
Page 8: Installation Basics
Search for any topic: Installation Basics A2L-SPECIFIC WARNING / INSTRUCTION Air Handler: The heat pump uses R454b, an refrigerant The front access panel (with the fan motor behind it) which is a classification meaning “mildly flamma- should remain clear of obstruction for a distance of 2 ft (0.7 m) ble”. -
Page 9: Sample Bill Of Materials - Ground Loop Installations
Ground Loop Installations Open Loop Installations FROM MARITIME GEOTHERMAL FROM MARITIME GEOTHERMAL • RS SERIES COMPRESSOR UNIT • RS SERIES COMPRESSOR UNIT • AHH (HORIZ.) OR AHV (VERTICAL) AIR HANDLER • AHH (HORIZ.) OR AHV (VERTICAL) AIR HANDLER • PLENUM HEATER __kW •... -
Page 10: Wiring
Search for any topic: Wiring Power Supply Connections Auxiliary Plenum Heater: Power Supply Connections Power supply for the heat pump from the breaker panel is supplied to the RS-series compressor unit via concentric Auxiliary air heat will usually be provided by an electric 1.093”... -
Page 11: Control Transformer
Search for any topic: Air Thermostat Operation Control Transformer Demand for room heating or cooling through the ducted air The low voltage controls, including the control board, are system will come from the above thermostat. Refer to the ther- powered by a 100VA class II transformer in the RS unit. (There mostat’s manual to set it up for 2-stage heat pump with electric is no transformer in the air handler, unlike in previous revisions.) backup, and for details on thermostat operation. -
Page 12: Domestic Hot Water (Desuperheater)
Search for any topic: Domestic Hot Water (Desuperheater) The desuperheater (located in the compressor unit) is pre- wired and no field connections are necessary. There is a built-in temperature switch to turn off the built-in DHW circulator when the output temperature reaches 140°F (60°C), and on again when the temperature falls to 120°F (49°C). -
Page 13: 002823Cdg - Typ. Rs-Series Wiring Connections (Gen2)
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Page 14: Piping
Search for any topic: Piping RS Compressor Unit: RS Compressor Unit: Outdoor Loop Domestic Hot Water (Desuperheater) The connections for the Outdoor Loop circuit are 1” brass female NPT. They are labelled OUTDOOR IN and The connections for the DHW circuit are 1/2” brass OUTDOOR OUT. -
Page 15: 002516Pdg - Typical Piping/Duct Connections
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Page 16: 000970Pdg - Desup. Connection To Dhw Pre-Heat Tank
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Page 17: 002384Pdg - Dhw Pre-Heat Tank - Multiple Units
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Page 18: Refrigeration Line Set
Search for any topic: Refrigeration Line Set Line Set Interconnect Tubing TABLE 11 - Line Set Sizing Once both the RS compressor unit and AHH/AHV air Vapour line O.D. 3/4” handler have been mounted, the line set may be run between RS-45 Liquid line O.D. -
Page 19: Pipe Insulation
Search for any topic: Pipe Insulation port of a refrigerant tank and place the tank on a scale. Open the liquid valve of the refrigerant tank and then slightly loosen All line set refrigerant piping between the two units should the charge (yellow) hose at the manifold until liquid comes out, be insulated with 3/8”... -
Page 20: Ductwork
Search for any topic: Ductwork Blower Motor lar should be at least 12” away from the heater elements. The air handler is equipped with a direct drive ECM blow- If desired, the first 5-10 feet of the main supply trunks can er. -
Page 21: Duct Sizing Guide
Search for any topic: TABLE 16 - Duct Sizing Guide (external static of 0.20” H Minimum Return Air Airflow Diameter Airflow Duct Area Rectangular Equivalents (in) Diameter (CFM) (in) (L/s) (sq.in) (in) 2.25 x 10 3 x 8 3.5 x 6 4 x 5.5 5 x 5 2.25 x 10... -
Page 22: Ground Loop Installations
Search for any topic: Ground Loop Installations Refer to diagrams 000608INF & 000609INF at the end of Adjust the circulator pump module valves to connect the this chapter for typical ground loop configurations. They are for purge cart to the ground loop. Begin pumping water through the reference only, and should not be used to replace formal train- ground loop, ensuring that the intake of the pump stays ing and computerized loop design. -
Page 23: Adding Antifreeze Solution
Search for any topic: Once the lines have been filled and no more air bubbles are TABLE 18 - Volume of fluid per 100 ft. of pipe appearing in the line, adjust the circulator pump module valves Volume /100ft. to circulate water through the heat pump using the same technique as described above. -
Page 24: 000608Inf - Typical Horiz. Ground Loop Configuration
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Page 25: 000609Inf - Typical Vert. Ground Loop Configuration
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Page 26: 000906Cdg - Circulator Pump Module Installation
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Page 27: 001823Cdg - Dual Flow Pump Module Installation
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Page 28: 002336Pdg - Pump Module Inst - 2 Units On 1 Loop
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Page 29: Open Loop Installations
Search for any topic: Open Loop Installations Well Water Temperature tween the pumping fluid level and the pump intake) would con- tribute linearly to the flow rate should a larger pump be installed. The temperature of the well water should be a minimum of 41°F (5°C), and should normally be 45°F+ (7°C+). -
Page 30: Water Valve
Search for any topic: well for residential applications. The water returned to the well Figure 2: Open Loop Accessories & Tools will not necessarily be pumped into the same aquifer, depend- ing on underground conditions. The return well must be able to Cumulative Water supply at least the same quantity of water as the amount you... -
Page 31: Water Flow Control
Search for any topic: Water Flow Control If Y1 and Y2 are jumpered together, it is recommended to consult diagram 001901PDG found earlier in this manual, so A flow restricting (‘Dole’) valve is highly recommended, that stage 1 may be used for cooling in order to achieve better installed downstream of the water valve. -
Page 32: 000907Cdg - Typical Open Loop Installation
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Page 33: 001822Cdg - Dual Flow Open Loop Installation
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Page 34: 000619Inf - Ground Water Disposal Methods
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Page 35: Pc Application (Pc App)
Search for any topic: PC Application (PC App) NOTE: Before using the PC Application, refer to Appendices for installation instructions for the PC App and USB driver. Connect a USB cable between the PC and the control board USB connector located at the bottom center of the board. Use the Win- dows Start menu to launch the PC App. - Page 36 Search for any topic: View Menu: This menu handles all of the operational viewing screens. Heat pump model Click to disable the unit and information fully open electric valves to allow work to be done to the refrigeration system. (Also accessible from Tools —>Service Tools menu.)
- Page 37 Search for any topic: View-->Alarms, Limits and Faults (ALARMS Tab) NOTE: Greyed out Alarms in the PC APP are not applicable to the system setup and are not monitored by the control board. NOTE: Refer to Alarms and Faults screenshot below to see which alarms have a count. Alarms without a count: These alarms only occur one time at which point they immediately create a Permanent Alarm.
- Page 38 Search for any topic: View-->Alarms, Limits and Faults (ALARMS LIST Tab) This tab show a history of alarms that have occurred while the PC App is connected, since it was last cleared. This button will erase the alarm events in the Alarm List. Each alarm that occurs while the PC APP is connected to the control...
- Page 39 Search for any topic: View-->Alarms, Limits and Faults (FAULTS tab) This tab shows hardware faults that could occur. If one of these faults occurs there may be a problem with the control board hard- ware, with LCD interface and buttons, or with a sensor. If a fault occurs, some things to try: •...
- Page 40 Search for any topic: View-->Indoor Fan Shows the settings screen for the indoor fan/blower. Airflow may be adjusted up or down by the user within the allowed range. See Indoor Airflow Data section in the Model Specific Information chapter for airflow ranges. NOTE: This screen may also be accessed from the SET button of the Indoor Fan section of the Control Panel screen.
- Page 41 Search for any topic: Graphs Menu: This menu is a list of the available graphs. Graphs are real-time and show a time stamp of when the recording started as well as a current time which will show up if the graph is screen captured. Each graph has a CLEAR button which will erase the stored data and restart the graph.
- Page 42 Search for any topic: Tools Menu: This is where various tools for system setup and monitoring are located. Tools-->Configuration (System Configuration tab) This is where the system setup is done. Settings should only be changed by a person who has a good understanding of sys- tem operation.
- Page 43 Search for any topic: Tools-->Configuration (Alarms and Delays tab) Click on the UP/DOWN arrows to change the value, noting that values have both a low and high limit. The number of minutes before the The minimum off unit can start again after various time when switching Count Reduce Time is alarm shutdowns...
- Page 44 Search for any topic: Tools-->Set Date and Time This will synchronize the control board’s time and date to that of the connected Win- dows PC. It is normally only necessary at installation or if electrical power has been off for several days. Tools-->Datalogging (Datalog tab) A log will be automatically recorded at the following rates: •...
- Page 45 Search for any topic: Tools-->Service Tools Tools-->Service Tools-->System Service Mode Disables the unit and fully opens electric valves to allow work to be done to the refrigeration system. (Also accessible via SERVICE button in View -->Control Panel window.) To exit service mode, main breaker must be turned off and then back on. Tools-->Service Tools-->Manual Override Allows individual control system demands or sensor values to be manually overridden for troubleshooting or service purposes.
- Page 46 Search for any topic: Tools-->MODBUS-->Generic MODBUS This window is for developer use. The one useful function for users is that when troubleshooting MODBUS communi- cations faults, Communications Type may be set to SERIAL (Debug) for a short time and then back to MODBUS RTU to see if that resets the fault and prevents fault re- occurrence.
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Page 47: Lcd Interface & Menus
Search for any topic: LCD Interface & Menus These are examples of the unit status and operating data displayed when at the message display level (top level). Pressing ENTER will enter into the menu levels beginning with the Main Menu. 2x16 LCD ENTER button: UP button:... -
Page 48: Bacnet Interface
Search for any topic: BACnet Interface The BACnet interface is an MS/TP connection via RS-485 twisted pair. BACnet IP is not available. Recommended wire: 22-24 AWG single twisted pair, 100-120 Ohms impedance, 17pF/ft or lower capacitance, with braided or alumi- num foil shield, such as Belden 9841 or 89841. - Page 49 Search for any topic: TABLE 22 - BACnet OBJECTS - DATA (Read Only) Name Property Units Description AI0 (Comp1_Current) Present Value Amps Compressor current draw AI1 (Comp2_Current) Present Value User Present Value ohms Present Value degF (degC) Compressor discharge line temperature AI4 (CTS) Present Value degF (degC)
- Page 50 Search for any topic: TABLE 23 - BACnet OBJECTS - LIMITS Description (Read Only) Decimal Name BIT # Bit Description Value* Limits Low Outdoor OUT temperature (Present Value) High Outdoor OUT temperature Note: Limits object is type Analog Value but value is bit coded and may be decoded as such (integer value). Note * : Value is for a single alarm and reference only.
- Page 51 Search for any topic: TABLE 25 - BACnet OBJECTS - FAULT Descriptions (Read Only) Name Data Type Description AI3 (Disch Temp) Analog Input Compressor discharge line temperature sensor faulty or disconnected AI4 (Cold Tank) Analog Input AI5 (Hot Tank) Analog Input LPS1 Analog Input Low pressure sensor faulty or disconnected...
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Page 52: Startup Procedure
Search for any topic: Startup Procedure The Startup Record located in this manual is used in conjunction with this startup procedure to provide a detailed record of the installation. A completed copy should be left on site, a copy kept on file by the installer and a copy should be sent to Maritime Geo- thermal Ltd. -
Page 53: Unit Startup
Search for any topic: Unit Startup The unit is now ready to be started. The steps below outline the procedure for starting the unit and verifying proper operation of the unit. It is recommended that safety glasses be worn during the following procedures. IMPORTANT NOTE: The unit is shipped with the compressor DISABLED in order to prevent the unit from starting when the power is first turned on. -
Page 54: Startup Record
Search for any topic: Startup Record: RS-Series Installation Site Startup Date Installer City Company Province Model Country Serial # Homeowner Name Homeowner Phone # Check boxes unless asked to record data. Circle data units. PRE-START INSPECTION Ductwork Ductwork is completed, dampers/ diverters are adjusted Registers are open and clear of objects Air filter and end cap are installed Condensate Drain is connected, properly vented and free of debris... -
Page 55: Routine Maintenance
Search for any topic: Routine Maintenance MAINTENANCE SCHEDULE Item Interval Procedure Air Filter 6 months Inspect for dirt. Replace if necessary. Compressor 1 year Inspect for pitted or burned points. Contactor Replace if necessary. Air Handler Con- 1 year Inspect for clogs. Clean if necessary. densate Drain LCD Interface or When heat pump... - Page 56 Search for any topic: Coaxial Heat Exchanger Flushing Procedure - Closed Ground Loop 1. Isolate the heat exchanger by placing the pump module valves in the exchanger flushing position. 2. Connect a compressed air and a drain pipe to the pump module purge ports and blow the anti-freeze solution into a clean 5 gallon bucket.
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Page 57: Troubleshooting Guide
Search for any topic: Troubleshooting Guide The following steps are for troubleshooting the heat pump system. If the problem is with the domestic hot water or the ple- num heater, proceed to those sections at the end of the troubleshooting guide. Repair procedures and reference refrigera- tion circuit diagrams can be found later in this manual. -
Page 58: Alarm Troubleshooting
Search for any topic: ALARM TROUBLESHOOTING Description Recommended Action Alarm/Fault The data logging function of the GEN2 Control Board is a very useful tool for troubleshooting alarms. It provides a histo- ry of the unit operation up to and including the time at which the alarm(s) occurred. Note that some alarms require ac- cessory components. -
Page 59: Fault Troubleshooting
Search for any topic: FAULT TROUBLESHOOTING Alarm/Fault Description Recommended Action Pressure Sensors The sensor is reading outside of the ac- Replace the pressure sensor. If this does not recti- ceptable range. Check to ensure connect- fy the problem, replace the control board. or is on securely. - Page 60 Search for any topic: BACnet TROUBLESHOOTING Recommended Fault Possible Cause Verification Action BACnet Selected baud rate does Check baud rate of system. Adjust BACnet parame- communications not match building con- ters in the PC App’s not working trol system Tools-->Configuration properly Selected MAC address Check MAC address and Instance # in rela-...
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Page 61: Compressor Troubleshooting
Search for any topic: COMPRESSOR TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Compressor will Faulty control board No 24vac output on STAGE1 when Replace control board. not start compressor should be operating. Faulty run capacitor Check value with capacitance meter. Replace if faulty. -
Page 62: Operation Troubleshooting
Search for any topic: OPERATION TROUBLESHOOTING - HEATING MODE Possible Cause Verification Recommended Action Fault High or low Faulty sensor Compare pressure sensor reading Check wiring, replace sensor. If suction or dis- against a known reference such as a problem persists, replace control charge pressure new refrigeration manifold set. - Page 63 Search for any topic: OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action High suction EEV in RS unit stuck open Manually adjusting EEV1 does not Go to EEV troubleshooting sec- pressure affect the superheat or the suction tion.
- Page 64 Search for any topic: OPERATION TROUBLESHOOTING - COOLING MODE Fault Possible Cause Verification Recommended Action Heating instead Thermostat not set up Verify that there is 24VAC across O Correct setup. of cooling properly and C of the terminal strip when calling for cooling.
- Page 65 Search for any topic: OPERATION TROUBLESHOOTING - COOLING MODE Fault Possible Cause Verification Recommended Action High suction EEV in air handler stuck Manually adjusting EEV2 does not Go to EEV troubleshooting section. pressure open affect the superheat or the suction (may appear to pressure.
- Page 66 Search for any topic: FAN/BLOWER TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Low airflow Dirty air filter Inspect. Replace. Dirty air coil Inspect. Clean. Poor ductwork Measure delta T between supply The ECM fan will provide proper and return ducts at the unit. In airflow up to 0.5 inH O.
- Page 67 Search for any topic: EEV (Electronic Expansion Valve) TROUBLESHOOTING Electronic expansion valves are a great advancement over TVX’s, allowing more precise refrigerant control, but they do have a couple of limitations. a) EEV’s receive commands to open or close from the control board, but they don’t send any feedback to the control board to confirm that command has been received and acted upon.
- Page 68 Search for any topic: PLENUM HEATER TROUBLE SHOOTING Fault Possible Cause Verification Recommended Action No 230VAC Disconnect switch open. Verify disconnect switch is in the ON Determine why the disconnect across plenum (if installed) position. switch was opened, if all is OK heater L1 and L2 close the switch.
- Page 69 Search for any topic: DOMESTIC HOT WATER (DESUPERHEATER) TROUBLE SHOOTING Fault Possible Cause Verification Recommended Action Insufficient hot Thermostat on hot water Visually inspect the setting. Adjust the setting. water (tank tank set too low (should problem) be set at 120°F to 140°F) Breaker tripped, or fuse Check both line and load sides of Correct problem, and replace...
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Page 70: Service Procedures
Search for any topic: Service Procedures A2L-SPECIFIC WARNING / INSTRUCTION Servicing a Unit with an Refrigerant 1. Work procedure Work should be undertaken under a controlled procedure, for example according to an ordered checklist. This may be in contrast to how refrigeration service work has normally been performed in the past, and is to minimize the risk of flammable gas being present while the work is being performed . - Page 71 Search for any topic: A2L-SPECIFIC WARNING / INSTRUCTION Servicing a Unit with an Refrigerant (continued) 8. Checks to electrical devices & wiring Where electrical components are being changed, they should be as specified by Maritime Geothermal Ltd.. If in doubt, consult technical support for assistance. Electrical components should be inspected.
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Page 72: Pumpdown Procedure
Search for any topic: SERVICE MODE via the LCD or PC App before any post- IMPORTANT: Power up the unit and engage installation service: pressure testing, vacuuming, or charging the line set. This will ensure all electronic valves are open and there are no sections of trapped/isolated piping. Pumpdown Procedure 1. -
Page 73: Compressor Replacement Procedure
Search for any topic: Compressor Replacement Procedure 1. Pump down the unit as per the Pumpdown Procedure above. If there was a compressor burn out (motor failure), the refrigerant cannot be reused and must be disposed of according to local codes. 2. -
Page 74: Control Board Replacement Procedure
Search for any topic: Control Board Replacement Procedure 1. Turn the power off to the unit. 2. Take a picture of the control board and connectors for reference. The picture in Appendix A may also be helpful. Carefully remove all green terminal strips on the left side, the right side and the bottom of the control board. They pull straight off the board, with no need to disconnect wires from their screw terminals. -
Page 75: Lcd Interface (Display) Board Replacement Procedure
Search for any topic: LCD Interface (Display) Board Replacement Procedure 1. Turn the power off to the unit. 2. Remove the display board cable connector from the control board. 3. Using a sharp utility knife with a long blade, slice each of the display board standoff heads off, taking care to not damage the lexan cover. -
Page 76: Decommissioning
Search for any topic: Decommissioning When the heat pump has reached the end of its useful lifetime after many years of service, it must be decommissioned. Before carrying out this procedure, it is essential that the technician is completely familiar with the system and all its con- nected equipment. -
Page 77: Model Specific Information
Search for any topic: Model Specific Information Table 26 - Refrigerant Charge MODEL Refrigerant Oil Type RS-45 R454b RS-55 R454b RS-65 10.0 R454b RS-75 11.0 R454b - Oil capacity is marked on the compressor label. - Refrigerant charge is subject to revision; actual charge is indicated on the unit nameplate. -
Page 78: Standard Capacity Ratings
Search for any topic: Standard Capacity Ratings Standards C13256-1 / ISO13256-1 / ARI 13256-1 Table 32 - Standard Capacity Ratings - Ground Loop Heating* 60Hz STAGE 1 - ELT 41°F (5°C) EAT 68°F (20°C) * 15% Methanol by Weight Ground Loop Fluid STAGE 2 - ELT 32°F (0°C) Input Liquid Flow... -
Page 79: Pressure Drop Data
Search for any topic: Pressure Drop Data Table 36: Loop Pressure Water 104°F Water 50°F Drop Data 15% Methanol 32°F 35% prop. glycol 32°F 0.25 0.32 0.38 0.44 0.50 0.57 RS-45 0.63 0.69 0.76 0.82 0.88 11.3 0.95 12.5 0.38 0.44 0.50 0.57... - Page 80 Search for any topic: Table 36: Loop Pressure Water 104°F Water 50°F (cont’d) Drop Data 15% Methanol 32°F 35% prop. glycol 32°F 0.38 0.44 0.50 0.57 0.63 RS-65 0.69 0.76 0.82 0.88 0.95 1.01 0.38 0.44 0.50 0.57 0.63 0.69 RS-75 0.76 0.82...
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Page 81: Performance Tables
Search for any topic: Performance Tables RS-45-HAC*-X-1T R454b, 60 Hz, YAS30K1E-PFV OUTDOOR LOOP (15% Methanol) ELECTRICAL INDOOR LOOP (Air) Evap. Flow Delta T Heat Abs. Compressor Input Cond. Airflow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Current (A)* Power (W) (°F) Temp. - Page 82 Search for any topic: Performance Tables RS-55-HAC*-X-1T R454b, 60 Hz, YAS40K1E-PFV OUTDOOR LOOP (15% Methanol) ELECTRICAL INDOOR LOOP (Air) Evap. Flow Delta T Heat Abs. Compressor Input Cond. Airflow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Current (A)* Power (W) (°F) Temp.
- Page 83 Search for any topic: Performance Tables RS-65-HAC*-X-1T R454b, 60 Hz, YAS51K1E-PFV OUTDOOR LOOP (15% Methanol) ELECTRICAL INDOOR LOOP (Air) Evap. Flow Delta T Heat Abs. Compressor Input Cond. Airflow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Current (A)* Power (W) (°F) Temp.
- Page 84 Search for any topic: Performance Tables RS-75-HAC*-X-1T R454b, 60 Hz, YAS60K1E-PFV OUTDOOR LOOP (15% Methanol) ELECTRICAL INDOOR LOOP (Air) Evap. Flow Delta T Heat Abs. Compressor Input Cond. Airflow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Current (A)* Power (W) (°F) Temp.
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Page 85: Electrical Specifications
Search for any topic: Electrical Specifications Electrical Specifications TABLE 37 - RS-Series (R454b) Electrical Specifications Out- Max. Min. Power Supply Compressor door Fuse/ Wire Code Circ. Breaker Size V-ø-Hz Max A Amps Amps Amps 208/230-1-60 14.6 22.9 26.6 #8-2* 208-3-60 18.2 20.7 #10-3*... -
Page 86: Airflow Data
Search for any topic: Airflow Data TABLE 39 - Airflow Range for STAGE 2 (Full Load) Airflow Reduction Airflow Reduction Airflow Reduction Airflow Reduction Nominal Range Model - 20% - 15% - 10% - 5% Size 1150 900-1400 430-660 1040 1090 1500 1200-1800... -
Page 87: Wiring Diagrams: Rs Compressor Unit
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Page 90: Wiring Diagrams: Air Handler
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Page 91: Refrigeration Circuit Diagram
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Page 92: Dimensions
Search for any topic: Dimensions: RS-45 Compressor Unit All dimensions in inches. LEFT SIDE RECOMMENDED RECOMMENDED FRONT CLEARANCE: CLEARANCE RIGHT SIDE CLEARANCE: 2 FT 2 FT OPTIONAL NO BACK CLEARANCE REQUIRED 1-May-2025 Page 92 002742MAN-01... - Page 93 Search for any topic: Dimensions: AHH-45 Horizontal Air Handler RECOMMENDED FRONT CLEARANCE: 2 FT Dimensions: AHV-45 Air Vertical Handler LEFT SIDE RECOMMENDED CLEARANCE FRONT CLEARANCE: OPTIONAL 2 FT 1-May-2025 Page 93 002742MAN-01...
- Page 94 Search for any topic: Dimensions: RS-55/65/75 Compressor Unit All dimensions in inches. RECOMMENDED LEFT SIDE RECOMMENDED CLEARANCE FRONT CLEARANCE: RIGHT SIDE CLEARANCE: 2 FT 2 FT OPTIONAL NO BACK CLEARANCE REQUIRED 1-May-2025 Page 94 002742MAN-01...
- Page 95 Search for any topic: Dimensions: AHH-55/65/75 Horizontal Air Handler RECOMMENDED FRONT CLEARANCE: 2 FT Dimensions: AHV-55/65/75 Vertical Air Handler LEFT SIDE RECOMMENDED CLEARANCE FRONT CLEARANCE: 2 FT OPTIONAL 1-May-2025 Page 95 002742MAN-01...
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Page 96: Appendix A: Control Board Description
Search for any topic: Appendix A - GEN2 Control Board Description The picture below shows the locations of the connectors and LED indicators of the control board. The control board offers many fea- tures such as short circuit protection on all digital outputs, Real Time Clock with super capacitor for backup power, WiFi capability, relay outputs for plenum heater control (if equipped), USB port, PIC32 microcontroller, etc. - Page 97 Search for any topic: The tables describe the connections starting with the top of the board and working around the board counter clock-wise. TABLE A1 - Control Board Connector Descriptions (Top) Name Description HPS1/HI1 High Pressure Sensor 1 Measures discharge pressure. LPS1/LO1 Low Pressure Sensor 1 Measures suction pressure.
- Page 98 Search for any topic: TABLE A3 - Control Board Connector Descriptions (Bottom) Name Description BACnet MS/TP Ground for shield if required. BACnet MS/TP RS-485. BACnet MS/TP RS-485. STAGE1 Compressor Stage 1 Starts / stops the compressor. STAGE2 Compressor Stage 2 Turns the compressor Stage 2 solenoid on/off.
- Page 99 Search for any topic: TABLE A4 - Control Board Connector Descriptions (Right Side) Name Description DI_1 Digital Input1 Not used. DI_0 Digital Input0 Low pressure select from open/closed loop harness (0=open loop, 1=closed loop) Phase Monitor2 Not used. Phase Monitor1 Not used.
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Page 100: Appendix B: Usb Driver Installation
Search for any topic: Appendix B - USB Driver Installation (Windows 10 & earlier 4. In the window that is displayed, click and hold down the NOTE: This step is not necessary for Windows 11. mouse button on the folder name, and drag to your desktop: The first step in connecting a Windows 10 or earlier laptop computer to the control board is to install the USB driver. -
Page 101: Appendix C: Pc App Installation (Win11)
Search for any topic: Appendix C - PC App Installation (Windows 11) The PC App allows detailed interfacing with the control board 4. Click on the downloads icon on your browser, or using a Windows laptop computer. These instructions are for otherwise view a list of your downloaded files: Windows 11. -
Page 102: Appendix D: Pc App Installation (Win10)
Search for any topic: Appendix D - PC App Installation (Windows 10 & earlier) 4. In the window that is displayed, click and hold down the The PC App allows detailed interfacing with the control board mouse button on the folder name, and drag to your desktop: using a Windows laptop computer. -
Page 103: Appendix E: Updating Firmware
Search for any topic: Appendix E: Updating Firmware METHOD 1: Updating Firmware Using PC App This method can be used when updating newer control boards 7. Click on YES. The following message box will appear: with bootloader version 2.0. This method will not work for older control boards with bootloader version 1.0 (approx. -
Page 104: Reset To Defaults
Search for any topic: 12. Click on Load Hex File. Select the 16. Close the PIC32 program. MGL_GEN2_V376.production.hex (or higher version num- ber) file, which is in the folder you created on the Desktop. 17. WAIT APPROXIMATELY 10 SECONDS. This gives the control board time to reset, initialize and re-connect to the PC USB port. - Page 105 Search for any topic: METHOD 2: Updating Firmware Using Jumper Pins This method should be used when updating older control boards 6. Turn the power back on. The control board is now in boot that have bootloader version 1.0, or where the PC App has trou- loader mode and is ready to be programmed.
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Page 106: Warranty
Search for any topic: Warranty: RS-Series RESIDENTIAL LIMITED EXPRESS WARRANTY Unless a statement is specifically identified as a warranty, statements made by Maritime Geothermal Ltd. (“MG”) or its representatives relating to MG’s products, whether oral, written or contained in any sales literature, catalogue or agreement, are not express warranties and do not form a part of the basis of the bargain, but are merely MG’s opinion or commendation of MG’s products.
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