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- Page 1 Installation and Service Manual WD-Series Wall Mounted Domestic Hot Water Water-Source Heat Pump R134a 60Hz Maritime Geothermal Ltd. info@nordicghp.com P.O. Box 2555, 170 Plantation Road www.nordicghp.com Petitcodiac, NB E4Z 6H4 002337MAN-01 (506) 756-8135 1-Sep-2018 Page 1 002337MAN-01 1-Sep-2018...
- Page 2 CONDENSER WD-16 This manual applies only to the models and revisions listed in this table. Maritime Geothermal Ltd. has a continuous improvement policy and reserves the right to modify specification data at any time without prior notice . 002337MAN-01 Page 2...
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Page 3: Table Of Contents
Table of Contents Tables & Documents Startup Procedure ..........3 ............ 14 Pre-start Inspection ............... 14 WD-Series System Description ......4 Unit Startup ................14 General Overview ..............4 Startup Record ..............15 Open Loop Operation ............. 4 General Maintenance .......... -
Page 4: Wd-Series System Description
WD-Series System Description General Overview Ground Loop Operation The WD-16 heat pump is a water-source heat pump that A closed ground loop is an excellent heat source for the heat pump in warmer climates, where the loop temperature is can fully take over residential domestic hot water (DHW) heating above 45°F (7°C) year-round. -
Page 5: Installation Basics
Unit Placement • P/T PORTS The heat pump must be placed within 20 ft (6m) of the OPTIONAL FROM MARITIME GEOTHERMAL domestic hot water tank. This, along with the requirement for • COMPRESSOR SOUND JACKET 3/4” piping, ensure the built-in DHW circulation pump can deliver •... -
Page 6: Wiring
Wiring Heat Pump Power Supply Connections DHW Circulator Wiring The DHW circulator pump is built in to the heat pump, so The unit has a 7/8” knockout for main power supply con- no field wiring is required. nection to the electrical box. There are also a 7/8” knockout and a 1/2”... -
Page 7: Optional Dhw Aquastat
Optional DHW Aquastat Optional Ground Loop Aquastat The WD-Series heat pump use its built-in temperature If using the WD-series heat pump where the source switch and repeat cycle timer to turn on when water temperature (ground loop) temperature might seasonally fall below the mini- at the bottom of the tank falls below 120°F (49°C), and turn off mum of ~45°F, an additional aquastat may be used to deacti- when output water temperature reaches 140°F (60°C). -
Page 8: 002341Cdg - Wd-Series Wiring Connections
002337MAN-01 Page 8 1-Sep-2018... -
Page 9: 002342Cdg - Ground Loop Lockout Aquastat Connection
1-Sep-2018 Page 9 002337MAN-01... -
Page 10: Piping
Piping For all piping, refer to diagrams on following pages. long as possible (e.g. 12 hours) at the flow rate required, and measuring the pumping fluid level to ensure it is still well above Domestic Hot Water Piping the submersible pump intake. Well water quality should also be verified. -
Page 11: 002339Pdg - Piping Connections (Open Loop Source)
1-Sep-2018 Page 11 002337MAN-01... -
Page 12: Outdoor Piping - Ground Loop
Model Specific Information section. P/T ports, adapters, and gauge adapters and are available as accessories from Maritime Geothermal Ltd.. After WD connection, the loop must be re-purged of air us- ing the standard procedures. -
Page 13: 002340Pdg - Piping Connections (Ground Loop Source)
1-Sep-2018 Page 13 002337MAN-01... -
Page 14: Startup Procedure
The startup record 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 Geothermal Ltd.. -
Page 15: Startup Record
Cooling S1 Setpoint, S1 Delta, S2 Setpoint, S2 Delta °F °C Date: Installer Signature: Homeowner Signature: A total of three copies are required: one for the homeowner, one for the installer, and one to be sent to Maritime Geothermal Ltd. 1-Sep-2018 Page 15 002337MAN-01... -
Page 16: General Maintenance
General Maintenance GENERAL MAINTENANCE SCHEDULE Item Interval Procedure Compressor Contactor 1 year Inspect for pitted or burned points. Replace if necessary. As required* Clean as per HEAT EXCHANGER FLUSHING PROCEDURE below. Heat exchanger *Whenever system performance is reduced. More likely to be required for the DHW loop, especially when heat- ing domestic water from a water well. -
Page 17: Troubleshooting Guide
Troubleshooting Guide Repair procedures and reference refrigeration circuit diagrams can be found at the end of the troubleshooting guide. STEP 1: Remove the cover and verify that there is power to the heat pump, referring to POWER SUPPLY TROUBLESHOOTING below. If ok, proceed to STEP 2. STEP 2: Check to see if there is a fault code on the control board. - Page 18 OPTIONAL AQUASTAT TROUBLESHOOTING Fault Possible Cause Verification Recommended Action No display on Transformer breaker 230VAC is present across L1 and L3 of Push breaker back in. If it trips again tripped. the compressor contactor but 24VAC is locate cause of short circuit and cor- aquastat (if used) not present across R and C.
- Page 19 (Fault Code 2 Faulty control board. 24VAC is present across LPS and C of Replace control board. the terminal strip, as well as HPS (left continued) terminal) and C, but is not present across CC on the control board and C after 10 minutes.
- Page 20 Compressor Start capacitor faulty. Check with capacitance meter. Replace if faulty. (Single phase only) Check for black residue around blowout Remove black residue in electrical starts hard hole on top of capacitor. box if any. Potential Relay faulty. Replace with new one and verify com- Replace if faulty.
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Page 21: Troubleshooting Tools
OPERATION TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Low Suction TXV stuck almost closed or Adjusting the TXV does not affect the Adjust the TXV all the way in and out partially blocked by foreign superheat or the suction pressure. TXV a few times to loosen it. -
Page 22: Repair Procedures
The heat pump is now ready for repairs. Always ensure nitrogen is flowing through the system during any brazing procedures to prevent oxidation inside the pipes. Maritime Geothermal Ltd. recommends replacing the liquid line filter-dryer any time the refrigeration system has been exposed to the atmosphere. -
Page 23: Shipping Information
Model Specific Information Table 7 - Shipping Information Table 8 - Refrigerant Charge WEIGHT DIMENSIONS in (cm) MODEL Refrigerant Oil Type MODEL lb. (kg) WD-16 R134a WD-16 160 (73) 38 (97) 16 (41) 33 (84) - Oil capacity is marked on the compressor label. - Refrigerant charge is subject to revision;... -
Page 24: Performance Tables
< Preliminary > Performance Tables 120°F (49°C) Output R134a 60 Hz WD-16 Source Data (Outdoor Loop) Sink Data (Indoor Loop) Power / Efficiency Water Water Evap. Cond. Flow Delta T Effective COPh Flow Delta T Output Temp Temp. °F °F °F °F Btu/hr... -
Page 25: Wiring Diagram (208/230-1-60)
Wiring Diagram (208/230-1-60) 1-Sep-2018 Page 25 002337MAN-01... -
Page 26: Wiring Diagram - Contactor Kits
Wiring Diagram - Contactor Kits 002337MAN-01 Page 26 1-Sep-2018... -
Page 27: Wd-Series Refrigeration Circuit
1-Sep-2018 Page 27 002337MAN-01... -
Page 28: Dimensions
Dimensions 002337MAN-01 Page 28 1-Sep-2018... -
Page 29: Warranty
2. The installer must complete the “Installation Data Sheet”, have it endorsed by the owner and return it to Maritime Geothermal Ltd. within 21 days of installation of the unit. 3. It is the responsibility of the building or general contractor to supply temporary heat to the structure prior to occupancy.
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