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

Liquid to air geothermal heat pumps
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Installation and Service Manual
R-Series
Slim Design
Two-Stage R410a
Model Sizes 25-80
Liquid to Air Geothermal Heat Pumps
Maritime Geothermal Ltd.
Email: info@nordicghp.com
P.O. Box 2555
Web: www.nordicghp.com
Petitcodiac, N.B.
E4Z 6H4
Document Number: 001200MAN-05
Ph. (506) 756-8135
ECO 000212
02 JAN 2014
Page 1
001200MAN-05
DATE : 02 JAN 2014

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  • Page 1 Installation and Service Manual R-Series Slim Design Two-Stage R410a Model Sizes 25-80 Liquid to Air Geothermal Heat Pumps Maritime Geothermal Ltd. Email: info@nordicghp.com P.O. Box 2555 Web: www.nordicghp.com Petitcodiac, N.B. E4Z 6H4 Document Number: 001200MAN-05 Ph. (506) 756-8135 ECO 000212...

  • Page 2: Safety Precautions

    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 risk of electrical shock. WARNING: Before performing service or maintenance on the heat pump system, ensure all power sources are DISCONNECTED.
  • Page 3 APPLICATION TABLE SIZE FUNCTION REFRIGERANT VOLTAGE COMPRESSOR OUTDOOR FAN/CASE REVISIONS STAGES* COIL SDELF HACW SDERF SDELF HACW SDERF SDELF HACW SDERF SDELF HACW SDERF SDELF SDERF HACW SDELF HACW SDERF This manual applies only to the models and revisions listed in this table * T = Two Stage, S = Single Stage Maritime Geothermal Ltd.

  • Page 4: Table Of Contents

    Table of Contents TABLES, DIAGRAMS & DRAWINGS: PAGE 5 INSTALLATION INFORMATION: PAGE 6 Unit description: ..Page 6 Unpacking the unit: ... Page 6 Optimum Placement: . Page 6 Electrical Connections: Page 6 Control Transformer : Page 6 Circulator Pump Module Wiring (Ground Loop Only): .
  • Page 5 Tables, Diagrams and Drawings TABLES Table 1 - Power Supply Connections (Heat Pump): ..Page 6 Table 2 - Power Supply Connections (Optional Plenum Heater): ..Page 6 Table 3 - Control Signal Description: ..Page 7 Table 4 - Airflow Selections: ...

  • Page 6: Installation Information

    UNIT DESCRIPTION ELB diagram contain information about the size of wire for the The R-Series unit is a high efficiency two-stage geother- connections, as well as the recommended breaker size for both mal heat pump. Two-stage units offer longer runtimes and the heat pump and optional plenum heater.

  • Page 7: Thermostat Requirements

    Electrical Tables near the end of this manual to The R-Series heat pump can be ordered as a left or right determine if the model is two stage or one stage). The Y2 sig- hand return from the factory. This must be specified at time of...

  • Page 8: Domestic Hot Water Connections (Hacw Only)

    B. High Pressure Control DOMESTIC HOT WATER The high pressure safety control monitors the compressor CONNECTIONS (HACW only) discharge pressure and will shut the compressor down if the condensing pressure becomes too high. The port connections for the DHW circuit are 1/2” brass FPT There are (3) main reasons why this control would activate fittings.

  • Page 9: 001827Cdg - Typical Thermostat Connections

    02 JAN 2014 Page 9 001200MAN-05...

  • Page 10: 000970Pdg - Single Unit Connection To Dhw Pre-Heat Tank (Brass Fpt)

    001200MAN-05 Page 10 02 JAN 2014...

  • Page 11: Sizing And Ductwork

    Sizing and Ductwork heat pump are greatly reduced. HEAT PUMP SIZING TABLE 6 depicts a rough guideline as to the size of home Once the total heat loss has been calculated, the unit can each heat pump size can handle for ground loop installations. be sized using the performance tables (from the specifications document) in conjunction with the minimum expected entering TABLE 6 - Heat Pump Size vs.

  • Page 12: Duct Systems - Grill Layout

    The second function of the plenum heater is to provide emer- DUCT SYSTEMS - GRILL LAYOUT gency heat should a problem occur that causes the heat pump Most forced air heating systems in homes have the floor grills to be locked out. This can be engaged by setting the thermostat placed around the perimeter of the room to be heated.
  • Page 13 02 JAN 2014 Page 13 001200MAN-05...

  • Page 14: Table 10 - Duct Sizing Guide

    TABLE 10 - Duct Sizing Guide (external static of 0.20”H2O) 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 3.5 x 6...

  • Page 15: Ground Water System Information

    Ground Water System Information Water flow to the heat pump can be controlled very accurately GENERAL REQUIREMENTS by the installation of a reverse action refrigeration pressure The temperature of the well water should be a minimum valve in the discharge line of the unit. of 39°F (4°C), and should normally be 45+°F (7°C) The well system must be able to supply the required Another more common method of regulating the flow is by the...

  • Page 16: 000907Cdg - Typical Ground Water Installation For Size 25-75 Heat Pumps (Brass Fpt)

    A return well should be a minimum of 80 ft. from the supply When snow comes it will usually cover the entire process well for residential applications. The water returned to the well much like a small spring. It is recommended that the pipe be will not necessarily be pumped into the same aquifer, depend- below the frost line when possible for maximum freeze protec- ing on underground conditions.
  • Page 17 02 JAN 2014 Page 17 001200MAN-05...

  • Page 18: Ground Loop System Information

    Ground Loop System Information Once the ground loop has been pressure tested and the The P/T plug will allow the installer or homeowner to check header pipes have been connected to the circulator pump water flow through the loop by measuring the pressure module, the heat pump can be connected to the circulator pump difference through the heat exchanger and comparing it to that module.

  • Page 19: 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 20 001200MAN-05 Page 20 02 JAN 2014...

  • Page 21: Startup Procedure

    The following steps describe how to perform the startup procedure of the geothermal heat pump. 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 22: 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 23 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...

  • Page 24: General Maintenance

    General Maintenance GENERAL MAINTENANCE SCHEDULE Item Interval Procedure 6 months Inspect for dirt. Replace if necessary. Air Filter 1 year Inspect for pitted or burned points. Replace if necessary. Contactor Condensate Drain 1 year Inspect for clogs. Remove and clean if necessary. Heat exchanger As required* Clean as per HEAT EXHCANGER FLUSING PROCEDURE below.

  • Page 25: 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 refrig- eration circuit diagrams can be found at the end of the troubleshooting guide.
  • Page 26 THERMOSTAT TROUBLESHOOTING Fault Possible Cause Verification Recommended Action No Y1 signal to Incorrect thermostat Thermostat does not indicate a call Correct the setup. heat pump setup. for heat. No 24VAC signal present (after 6 minutes) across C and Stage 1 of the thermo- stat Faulty thermostat to heat 24VAC signal present across Stage...
  • Page 27 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.
  • Page 28 OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action High Discharge Air Flow 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 29 OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action High Suction Leaking reversing valve. Reversing valve is the same tem- Replace reversing valve. Pressure perature on both ends of body, (may appear to common suction line is warm, com- not be pumping) pressor is running hot.
  • Page 30 OPERATION TROUBLESHOOTING - COOLING MODE Fault Possible Cause Verification Recommended Action High Discharge Unit is overcharged. High sub-cooling, low delta T Remove 1/2lb of refrigerant at a pressure (Only possible if unit has across water coil. time and verify that the discharge been opened in the field pressure reduces.
  • Page 31 FAN 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 32 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 33 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 34: Repair Procedures

    REPAIR PROCEDURES PUMP DOWN PROCEDURE STEP 1 Connect the refrigerant recovery unit to the heat pump service ports via a refrigeration charging manifold and to a recovery tank as per the instructions in the recovery unit manual. If there was a compressor burn out, the refrigerant cannot be reused and must be disposed of according to local codes.

  • Page 35: Model Specific Information

    Model Specific Information This section provides general information particular to each model. For complete specifications please see the specifications document for the desired model. REFRIGERANT CHARGE CHART SHIPPING INFORMATION Table 14 - Refrigerant - R410a Table 15 - Shipping Information SIZE Lbs.

  • Page 36: Table 18 - Standard Capacity Ratings - Ground Loop Cooling 60Hz

    STADARD CAPACITY RATINGS (continued) Table 18 - Standard Capacity Ratings - Ground Loop Cooling* 60Hz STAGE 1 - ELT 68°F (20°C) EAT 80.6°F (27°C) STAGE 2 - ELT 77°F (25°C) Pressure Input Model Size Liquid Flow Mode Airflow Capacity Drop Energy Tons USGPM...

  • Page 37: Capacity Ratings

    CAPACITY RATINGS Heating Mode R-25-HACW-P-1T Nominal 2 ton R410a 60 Hz Power Consumption Source Data (Outdoor Loop) Sink Data (Indoor Loop) Evap. Cond. Flow Delta T Compressor Fan* Effective COPh Delta T Temp Temp. Flow Output °F °F USGPM °F °F BTU/Hr Watts Amps Watts...

  • Page 38: Heating Mode

    CAPACITY RATINGS (continued) Heating Mode R-45-HACW-P-1T Nominal 3 ton R410a 60 Hz Power Consumption Source Data (Outdoor Loop) Sink Data (Indoor Loop) Evap. Cond. Flow Delta T Compressor Fan* Effective COPh Delta T Temp Temp. Flow Output °F °F USGPM °F °F BTU/Hr...
  • Page 39 CAPACITY RATINGS (continued) Heating Mode R-55-HACW-P-1T Nominal 4 ton R410a 60 Hz Source Data (Outdoor Loop) Power Consumption Sink Data (Indoor Loop) Evap. Cond. Flow Delta T Compressor Fan* Effective COPh Delta T Temp Temp. Flow Output °F °F USGPM °F °F BTU/Hr...
  • Page 40 CAPACITY RATINGS (continued) Heating Mode R-65-HACW-P-1T Nominal 5 ton R410a 60 Hz Power Consumption Source Data (Outdoor Loop) Sink Data (Indoor Loop) Evap. Cond. Flow Delta T Compressor Fan* Effective COPh Flow Delta T Temp Temp. Output °F °F USGPM °F °F BTU/Hr...
  • Page 41 CAPACITY RATINGS (continued) Heating Mode R-75-HACW-P-1T Nominal 6 ton R410a 60 Hz Source Data (Outdoor Loop) Power Consumption Sink Data (Indoor Loop) Evap. Cond. Flow Delta T Compressor Fan* Effective COPh Delta T Temp Temp. Flow Output °F °F USGPM °F °F BTU/Hr...
  • Page 42 CAPACITY RATINGS (continued) Heating Mode R-80-HACW-P-1S Nominal 6 ton R410a 60 Hz Source Data (Outdoor Loop) Power Consumption Sink Data (Indoor Loop) Evap. Cond. Flow Delta T Compressor Fan* Effective COPh Delta T Temp Temp. Flow Output °F °F USGPM °F °F BTU/Hr...

  • Page 43: Electrical Tables

    ELECTRICAL TABLES Table 20 - Heat Pump Electrical Information (208/230-1-60) Outdoor Max Fuse/ Wire Model Compressor Circulators Breaker Size** Max A Amps Amps Amps 11.4 18.7 21.6 #10-2 18.6 26.9 31.6 #8-2 23.6 33.4 39.3 #8-2 28.6 39.9 47.1 #6-2 30.4 42.7 50.3...

  • Page 44: Table 24 - Heat Pump Electrical Information

    ELECTRICAL TABLES continued Table 24 - Heat Pump Electrical Information (380-3-50) Outdoor Max Fuse/ Wire Model Compressor Circulators Breaker Size Max A Amps Amps Amps 11.2 12.2 #14-4 13.3 14.6 #12-4 16.9 18.7 #10-4 10.0 21.3 23.8 #10-4 10.9 23.2 25.9 #8-4 11.8...

  • Page 45: Electrical Diagrams

    ELECTRICAL DIAGRAMS—Size 25 to 75 (208/230-1-60) 02 JAN 2014 Page 45 001200MAN-05...
  • Page 46 ELECTRICAL DIAGRAMS—Size 25 to 75 (208/230-1-60) - continued 001200MAN-05 Page 46 02 JAN 2014...
  • Page 47 ELECTRICAL DIAGRAMS—Size 80 (208/230-1-60) 02 JAN 2014 Page 47 001200MAN-05...
  • Page 48 ELECTRICAL DIAGRAMS—Size 80 (208/230-1-60) continued 001200MAN-05 Page 48 02 JAN 2014...

  • Page 49: Refrigeration Circuit Diagrams

    REFRIGERATION CIRCUIT DIAGRAMS 02 JAN 2014 Page 49 001200MAN-05...
  • Page 50 REFRIGERATION CIRCUIT DIAGRAMS (continued) 001200MAN-05 Page 50 02 JAN 2014...

  • Page 51: Case Details (Left Return)-Size 25 To 75

    CASE DETAILS (LEFT RETURN)—Size 25 to 75 Front View—Left Return Right Side View—Left Return (Size 25 & 45) Left Side View– Left Return Right Side View—Left Return (Size 55 to 75) 02 JAN 2014 Page 51 001200MAN-05...
  • Page 52 CASE DETAILS (LEFT RETURN)—Size 25 to 75 - continued Top View (Size 25 & 45) Top View (Size 55 to 75) 001200MAN-05 Page 52 02 JAN 2014...

  • Page 53: Case Details (Right Return)-Size 25 To 75

    CASE DETAILS (RIGHT RETURN)—Size 25 to 75 Front View—Right Return Left Side View—Right Return (Size 25 & 45) Right Side View– Right Return Left Side View—Right Return (Size 55 to 75) 02 JAN 2014 Page 53 001200MAN-05...
  • Page 54 CASE DETAILS (RIGHT RETURN)—Size 25 to 75 - continued Top View (Size 25 & 45) Top View (Size 55 to 75) 001200MAN-05 Page 54 02 JAN 2014...

  • Page 55: Case Details (Left Return)-Size 80

    CASE DETAILS (LEFT RETURN)—Size 80 Top View—Left Return Front View—Left Return Left Side View– Left Return Right Side View—Left Return 02 JAN 2014 Page 55 001200MAN-05...

  • Page 56: Case Details (Right Return)-Size 80

    CASE DETAILS (RIGHT RETURN)—Size 80 Front View—Right Return Top View—Right Return Right Side View– Right Return Left Side View—Right Return 001200MAN-05 Page 56 02 JAN 2014...

  • Page 57: Appendix A: Control Board Specifications

    APPENDIX A - Control Board Specifications 02 JAN 2014 Page 57 001200MAN-05...

  • Page 58: Appendix B: Ecm Fan Airflow Tables

    APPENDIX B - ECM Fan Airflow Tables NOMINAL AIRFLOW SETTING (MED) STAGE 2 STAGE 1 FAN ONLY (Recirculation) Model Full Reduced* Full Reduced* Full Reduced* 1200 1020 1030 1500 1275 1240 1054 1900 1615 1540 1309 1064 2100 1785 1660 1411 1176 1000...
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  • Page 60: Warranty Information

    LIMITED EXPRESS WARRANTY It is expressly understood that unless a statement is specifically identified as a warranty, statements made by Maritime Geothermal Ltd., a corporation registered in New Brunswick, Canada, (“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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