Nordic R Series Installation And Service Manual
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Nordic R Series Installation And Service Manual

Liquid to air geothermal heat pump
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Installation and Service Manual
R-Series
Liquid to Air Geothermal Heat Pump
Two-Stage R410a
Model Sizes 25-80
Maritime Geothermal Ltd.
info@nordicghp.com
P.O. Box 2555, 170 Plantation Road
www.nordicghp.com
Petitcodiac, NB E4Z 6H4
001200MAN-08
(506) 756-8135
ISSUE 04: 26-Aug-2021
Page 1
001200MAN-08
ISSUE 04
26-Aug-2021

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  • Page 1 Installation and Service Manual R-Series Liquid to Air Geothermal Heat Pump Two-Stage R410a Model Sizes 25-80 Maritime Geothermal Ltd. info@nordicghp.com P.O. Box 2555, 170 Plantation Road www.nordicghp.com Petitcodiac, NB E4Z 6H4 001200MAN-08 (506) 756-8135 ISSUE 04: 26-Aug-2021 Page 1 001200MAN-08 ISSUE 04 26-Aug-2021...
  • Page 2 SAFETY PRECAUTIONS WARNING: Ensure all access panels are in place and properly secured before applying power to the unit. Failure to do so may cause electrical shock. WARNING: Before performing service or maintenance on the heat pump system, ensure all power sources are DISCONNECTED.
  • Page 3 APPLICATION TABLE OUTDOOR SIZE FUNCTION REFRIGERANT VOLTAGE COMPRESSOR FAN/CASE REVISIONS COIL SDELF R-25 HACW SDERF SDELF R-45 HACW SDERF SDELF R-55 HACW SDERF SDELF R-65 HACW SDERF SDELF R-75 HACW SDERF SDELF R-80 HACW SDERF This manual applies only to the models and revisions listed in this table. Maritime Geothermal Ltd.

  • Page 4: Table Of Contents

    Airflow Data ................61 Outdoor Loop ................ 16 Electrical Specifications ............62 002511PDG - Typical Loop Connections - R Series ....17 000970PDG - Desup. Connection to DHW Pre-Heat Tank ..18 Wiring Diagram (208/230-1-60) ..........63 Electrical Box Layout - Sizes 25-75 (208/230-1-60) ....64 Ductwork ................

  • Page 5: Tables, Figures, & Documents

    001827CDG - Typical Thermostat Connections ..................14 001901PDG - Wiring For Best Cooling Mode Dehumidification ............15 002511PDG - Typical Loop Connections - R Series ................17 000970PDG - Desuperheater Connection to DHW Pre-Heat Tank ............18 001201CDG - Typical Duct and Condensate Connections ..............20 000608INF - Typical Horizontal Ground Loop Configuration ..............

  • Page 6: R-Series System Description

    General Overview In heating mode, the heat pump heats warm air in a duct The Nordic R-series, a geothermal standard for more than system. As the unit operates, heat is extracted from the ground 30 years, is a package water source heat pump that can heat or loop or well water.

  • Page 7: R-Series Sizing

    R-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 (closed in order to take advantage of the latent heat of groundwater (at loop) installations.

  • Page 8: Installation Basics

    Ground Loop Installations Open Loop Installations FROM MARITIME GEOTHERMAL FROM MARITIME GEOTHERMAL • R SERIES HEAT PUMP (L OR R RETURN) • R SERIES HEAT PUMP (L OR R RETURN) • PLENUM HEATER __kW • PLENUM HEATER __kW • THERMOSTAT (WIFI OR STD) •...

  • Page 9: Air Outlet Orientation

    Air Return Orientation maintenance. No access is required on the back side. Ensure the unit is level to eliminate any possible condensate draining The heat pump can be ordered as left or right air return issues. from the factory. This must be specified at time of order as the physical construction of the two configurations is different.

  • Page 10: 001915Inf - Internal Plenum Heater Installation

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  • Page 11: Wiring

    Wiring Power Supply Connections TABLE 6 - Ground Loop Circulator Connections The heat pump has a concentric 1.093” / 0.875” knockout Terminal Description for main power supply connection from the breaker panel to the 115V electrical box. There are also 0.875” knockouts and a plastic Connection for 115V circulator grommet for connections to plenum heater power supply, ther- 115V...

  • Page 12: Thermostat Requirements

    Thermostat Requirements It is recommended that airflow reduction only be used with the HIGH or MAX air flow setting. Care should be taken to en- A three-stage heating and two stage cooling heat pump sure that the unit does not trip a safety control in heating or cool- configurable thermostat is required for two-stage models.

  • Page 13: Safety Controls

    Safety Controls TABLE 9 - Control Board Fault Codes The heat pump has two important built in safety controls Fault LED Flashes which are designed to protect the unit from situations which could damage it should the operation of the refrigeration circuit High Pressure fall outside the allowable operating range.

  • Page 14: 001827Cdg - Typical Thermostat Connections

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  • Page 15: 001901Pdg - Wiring For Best Cooling Mode Dehum

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  • Page 16: Piping

    Piping Domestic Hot Water Condensate Drain (Desuperheater) Connections The unit comes equipped with one 3/4” female PVC socket drain connection. This drain allows the condensate which forms The connections for the DHW circuit are 1/2” brass during the air conditioning cycle to be removed from the unit. FPT fittings.

  • Page 17: 002511Pdg - Typical Loop Connections - R Series

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  • Page 18: 000970Pdg - Desup. Connection To Dhw Pre-Heat Tank

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  • Page 19: Ductwork

    Ductwork Blower Motor Duct Systems - Grill Layout The indoor unit is equipped with a direct drive ECM blower. Most forced air heating systems in homes have the floor See Wiring chapter for description and airflow adjustment. grills placed around the perimeter of the room. Supply grills should be placed under a window when possible to help prevent Refer to airflow tables in the Model Specific Information...

  • Page 20: 001201Cdg - Typical Duct And Condensate Connections

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  • Page 21: Duct Sizing Guide

    TABLE 11 - 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 3 x 8...

  • Page 22: Ground Loop Installations

    Ground Loop Installations Refer to diagrams 000608INF & 000609INF at the end of Adjust the circulator pump module valves to connect the this section 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

    Once the lines have been filled and no more air bubbles are TABLE 13 - 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

    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

    A return well should be a minimum of 80 ft. from the supply Figure 2: Open Loop Accessories & Tools well for residential applications. The water returned to the well will not necessarily be pumped into the same aquifer, depend- Cumulative Water ing on underground conditions.

  • Page 31: Submersible Pump Selection

    Plumbing the Heat Pump low refrigerant discharge pressure when in cooling mode. Dole valves are available as an accessory. The port connections for the Outdoor Loop are 1” brass FPT fittings. They are marked as OUTDOOR IN and OUT. Dole valves can emit a ‘whistling’ sound if the pressure drop through them is high.

  • 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: Startup Procedure

    Startup Procedure The R-Series Two-Stage R410a Startup Record located in this manual is used in conjunction with this startup procedure to pro- vide 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 Geothermal Ltd.

  • Page 36: Unit Startup

    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. Preparation: 1.

  • Page 37: Startup Record

    Startup Record: R-Series Size 25-80 Two-Stage R410a 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 38: Routine Maintenance

    General 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. Condensate 1 year Inspect for clogs. Clean if necessary. Drain Control Board When heat pump Check status light for faults.
  • Page 39 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.

  • Page 40: Troubleshooting Guide

    Troubleshooting Guide The following steps are for troubleshooting the geothermal heat pump. If the problem is with the domestic hot water or the plenum heater, proceed to those sections at the end of the troubleshooting guide. Repair procedures and reference refriger- ation circuit diagrams can be found at the end of the troubleshooting guide.
  • Page 41 FAULT CODE TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Fault Code 1 High operating refrigerant Using a refrigeration gauge set, veri- See “High Discharge Pressure” in (High Pressure pressure fy that high pressure approaches or Heating Mode / Cooling Mode Control) exceeds 565psi with compressor on.
  • Page 42 COMPRESSOR TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Compressor will Faulty Measuring from C on the terminal Replace control board control board not start strip, verify there is voltage at Y, HP1, HP2, LP1, LP2, and both flow pins but no voltage present at CC. Faulty run capacitor Check value with capacitance meter.
  • Page 43 OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action High Discharge Low airflow See Fan Troubleshooting section Correct the problem. Pressure TXV adjusted too far Verify superheat. It should be be- Adjust TXV to obtain 8-12°F closed tween 8-12°F (3-6°C). Superheat will (3-6°C) superheat.
  • Page 44 OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action High Suction Leaking reversing valve Reversing valve is the same temper- Tap reversing valve, and switch it Pressure ature on both ends of body, com- back and forth between heating (may appear to mon suction line is warm, compres- and cooling positions.
  • Page 45 OPERATION TROUBLESHOOTING - COOLING MODE Fault Possible Cause Verification Recommended Action High Discharge Unit is overcharged High subcooling, low delta T across Remove 1/2lb of refrigerant at a pressure (Only possible if unit has water coil. time and verify that the discharge been field serviced and pressure reduces.
  • Page 46 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, it in airflow up to 0.5 inH2o for 1/2HP heating mode, it should not be motors and 0.7 inH2o for 1HP...
  • Page 47 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 48 PLENUM HEATER TROUBLE SHOOTING Fault Possible Cause Verification Recommended Action No 24VAC signal Faulty Plenum Heater 24VAC is present across pin 1 and Replace relay. from 1 to ground Relay in heat pump pin 3 of the relay, 24VAC is present at the plenum from heat pump terminal strip I to heater control...

  • Page 49: Repair Procedures

    Repair Procedures Pumpdown Procedure 1. Connect the refrigerant recovery unit to the heat pump’s internal service ports via a refrigeration charging manifold and to a recovery tank as per the instructions in the recovery unit manual. Plan to dispose of refrigerant if there was a compressor burnout.

  • Page 50: Compressor Replacement Procedure

    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. Disconnect piping. 3.

  • Page 51: Model Specific Information

    Model Specific Information Table 15 - Refrigerant Charge MODEL Refrigerant Oil Type R-25 R410a R-45 R410a R-55 R410a R-65 10.0 R410a R-75 12.5 R410a R-80 11.5 R410a - Oil capacity is marked on the compressor label. - Refrigerant charge is subject to revision; actual charge is indicated on the unit nameplate.

  • Page 52: Standard Capacity Ratings

    Standard Capacity Ratings Standards C13256-1 / ISO13256-1 / ARI 13256-1 Table 18 - 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) Nominal Pressure Input...

  • Page 53: Pressure Drop Data

    Pressure Drop Data Table 22: Loop Pressure Water 104°F Water 50°F 15% Methanol 32°F 35% prop. glycol 32°F Drop Data 0.25 0.32 0.38 0.44 0.50 R-25 0.57 0.63 0.69 0.76 10.1 0.82 0.25 0.32 0.38 0.44 0.50 0.57 R-45 0.63 0.69 0.76 0.82...
  • Page 54 Table 22: Loop Pressure Water 104°F Water 50°F 15% Methanol 32°F 35% prop. glycol 32°F (cont’d) Drop Data 0.38 0.44 0.50 0.57 0.63 R-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 R-75 0.76 0.82 0.88 0.95 1.01 1.07...

  • Page 55: Performance Tables: R-25

    Performance Tables R-25-HACW-P-1T R410a, 60 Hz, ZPS20K5E-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. (cfm) (°F) (°F)

  • Page 56: Performance Tables: R-45

    Performance Tables R-45-HACW-P-1T R410a, 60 Hz, ZPS30K5E-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. (cfm) (°F) (°F)

  • Page 57: Performance Tables: R-55

    Performance Tables R-55-HACW-P-1T R410a, 60 Hz, ZPS40K5E-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. (cfm) (°F) (°F)

  • Page 58: Performance Tables: R-65

    Performance Tables R-65-HACW-P-1T R410a, 60 Hz, ZPS51K5E-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. (cfm) (°F) (°F)

  • Page 59: Performance Tables: R-75

    Performance Tables R-75-HACW-P-1T R410a, 60 Hz, ZPS60K5E-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. (cfm) (°F) (°F)

  • Page 60: Performance Tables: R-80

    Performance Tables R-80-HACW-P-1S R410a, 60 Hz, ZP70KWE-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. (cfm) (°F) (°F)

  • Page 61: Airflow Data

    Airflow Data Table 23: MED Airflow (nominal) STAGE 2 STAGE 1 FAN ONLY (Recirculation) AR1-AR2 AR1-AR2 AR1-AR2 Model Full Full Full reduction reduction reduction 1200 1020 1030 1500 1275 1240 1054 1900 1615 1540 1309 1064 2100 1785 1660 1411 1176 1000 2400...

  • Page 62: Electrical Specifications

    Electrical Specifications Electrical Specifications Out- Max. Min. Power Supply Compressor door Fuse/ Wire TABLE Elec. Circ. Breaker Size Code V-ø-Hz Max A Amps Amps Amps 208/230-1-60 10.9 18.2 20.9 #10-2* 208-3-60 13.8 15.4 #12-3* 265/277-1-60 11.8 14.1 #12-2 R-25 460-3-60 #14-4 220-1-50 16.5...

  • Page 63: Wiring Diagram (208/230-1-60)

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  • Page 64: Electrical Box Layout - Sizes 25-75 (208/230-1-60)

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  • Page 65: Electrical Box Layout - Size 80 (208/230-1-60)

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  • Page 66: Wiring Diagram (208-3-60)

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  • Page 67: Electrical Box Layout - Sizes 25-75 (208-3-60)

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  • Page 68: Electrical Box Layout - Size 80 (208-3-60)

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  • Page 69: Wiring Diagram (265/277-1-60)

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  • Page 70: Electrical Box Layout - Sizes 25-75 (265/277-1-60)

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  • Page 71: Electrical Box Layout - Size 80 (265/277-1-60)

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  • Page 72: Wiring Diagram (460-3-60)

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  • Page 73: Electrical Box Layout - Sizes 25-75 (460-3-60)

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  • Page 74: Electrical Box Layout - Size 80 (460-3-60)

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  • Page 75: Refrigeration Circuit - Heating Mode

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  • Page 76: Refrigeration Circuit - Cooling Mode

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  • Page 77: Dimensions: R-25/45 Left Return

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  • Page 78: Dimensions: R-25/45 Right Return

    Dimensions: R-25/45 Right Return ISSUE 04: 26-Aug-2021 Page 78 001200MAN-08...

  • Page 79: Dimensions: R-55/65/75 Left Return

    Dimensions: R-55/65/75 Left Return ISSUE 04: 26-Aug-2021 Page 79 001200MAN-08...

  • Page 80: Dimensions: R-55/65/75 Right Return

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  • Page 81: Dimensions: R-80 Left Return

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  • Page 82: Dimensions: R-80 Right Return

    Dimensions: R-80 Right Return ISSUE 04: 26-Aug-2021 Page 82 001200MAN-08...

  • Page 83: Warranty

    Warranty: R-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.

This manual is also suitable for:

R-25R-45R-55R-65R-75R-80

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