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Application, Installation, & Service Manual
W/WH-25/45/55
W/WH-65/75/80
Maritime Geothermal Ltd.
P.O. Box 2555, 170 Plantation Road
Petitcodiac, NB E4Z 6H4
(506) 756-8135
ISSUE 04: 23-Sep-2022
Water-to-Water Heat Pumps:
W-Series (Standard Range),
WH-Series (High Temperature),
Model Sizes 25-80 (Heating/Cooling)
Model Sizes 45-80 (Pool Heating)
Model Size 85 (Domestic Hot Water)
WP-45/55/65/75/80
Page 1
ISSUE 04: 23-Sep-2022
WP-Series (Pool Heating)
WH-85-H (DHW)
info@nordicghp.com
www.nordicghp.com
002500MAN-01
002500MAN-01
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Table of Contents
Related Manuals for Nordic WP Series
Summarization of Contents
Safety Precautions
Model Nomenclature
Explains the coding system used for identifying heat pump models and their features.
Series Description
W-Series Description
Describes the standard temperature geothermal heat/cooling series using R410a refrigerant.
WH-Series Description
Describes the high-temperature WH-series using R134a refrigerant for higher water temperatures.
WP-Series Description
Describes the dedicated pool heating WP-series, suitable for pool and spa heating.
One or Two Buffer Tanks?
Single Buffer Tank Systems
Details the advantages and drawbacks of using a single buffer tank system.
Dual Buffer Tank Systems
Explains the advantages and drawbacks of employing a dual buffer tank system.
Sizing for Space Heating and Cooling
W/WH-Series Heat Pump Sizing
Provides tables and guidance for sizing W/WH-Series heat pumps based on heated area and loop type.
Auxiliary Heat Sizing
Explains options for providing auxiliary or backup heat, including buffer tank elements.
Sizing for Pool Heating
Indoor Pools Sizing
Discusses considerations for heating and dehumidifying indoor pools.
Outdoor Pools / Hot Tubs Sizing
Explains how heat pumps can economically heat outdoor pools and hot tubs.
Installation Basics
Unpacking the Unit
Instructions for unpacking the heat pump and checking for shipping damage.
Unit Placement Guidelines
Guidelines on selecting an optimal location for the heat pump and buffer tank.
Wiring Procedures
Power Supply Connections
Explains how to connect the power supply to the heat pump unit, including breaker and wire gauge.
Indoor Circulator Pump Wiring
Describes how to connect the indoor loop circulator pump to the heat pump.
Outdoor Loop Pump Module Wiring
Explains wiring for the outdoor loop circulator pump module for ground loop systems.
Control Transformer
Information on the low voltage control transformer and its circuit protection.
Control System Setup
BACnet Connections
Instructions for connecting the heat pump to a BACnet system for external control.
Setpoint Control Connections
Describes using the on-board Setpoint Control routine for buffer tank temperature management.
Setpoint Control: Auxiliary Connections
Details methods for activating hydronic auxiliary heat using dry contacts or 24VAC signals.
Optional Aquastat Connections
Explains how to use an external aquastat or controller for temperature control.
Piping Requirements
W/WH-Series Tank Configurations
Discusses the need for one or two buffer tanks and control options for each.
Indoor Loop and Buffer Tank Piping
Details recommended buffer tank piping and connections for indoor loops.
Domestic Hot Water (Desuperheater) Connections
Explains the connections and precautions for the DHW desuperheater circuit.
Ground Loop Installations
Circulator Pump Module Installation
Describes the features and selection of circulator pump modules for ground loops.
Flushing and Purging Procedures
Explains the procedures for flushing and purging the ground loop system to remove air.
Adding Antifreeze Solution
Details the process of adding antifreeze to the ground loop fluid for freeze protection.
Initial Pressurization of Ground Loop
Explains how to initially pressurize the ground loop system with water or antifreeze mix.
Open Loop Installations
Well Water Temperature Considerations
Discusses the importance of well water temperature for open loop installations.
Well Water Flow Requirements
Explains how to measure and ensure adequate well water flow for the heat pump.
Well Water Quality Testing
Covers testing well water quality for hardness, chlorides, and solids to prevent system damage.
Water Discharge Methods
Outlines acceptable methods for disposing of cooled discharge water.
Water Valve Installation
Describes the types of water valves used and their installation for flow control.
Submersible Pump Selection and Power Draw
Guides on selecting submersible pumps and considerations for their power draw.
Heat Pump Operation Modes
BACnet Control
Details how to control the heat pump using a BACnet building control system.
Signals / Hardwired Control
Describes using external dry contacts for controlling the heat pump's stages and modes.
Setpoint Control Overview
Explains the on-board Setpoint Control feature for hydronic temperature management.
Setpoint Control Methods
Method 1: Indoor Loop (ICR) - One Tank
Details Setpoint Control using the indoor loop sensor for one-tank operation.
Method 3: External (HTS/CTS) - One Tank
Explains using external temperature sensors for Setpoint Control with one buffer tank.
Method 4: External (HTS/CTS) - Two Tanks
Details Setpoint Control using external sensors for two-tank operation.
PC Application Usage
PC Application Installation
Step-by-step guide for installing the PC Application software.
PC Application Menu Overview
Overview of the PC APP's menu structure including File, View, Graphs, Tools, and Help.
Viewing Alarms, Limits, and Faults
Explains how to view and interpret alarms, limits, and faults reported by the control board.
System Configuration Tools
Tools: System Configuration
Main section for configuring system settings like model, function, refrigerant, and control source.
Tools: Configuration Alarms and Delays
Configuration of alarm delays, counts, reduce times, and ignore start settings.
Tools: Reset to Factory Defaults
Resets all system parameters to factory defaults, requiring reconfiguration.
Tools: Update Firmware
Instructions for updating the control board's firmware using the PC App or jumper pins.
LCD Interface and Menus
LCD Interface Navigation
Describes the unit's LCD interface and navigation through its menus for setup and monitoring.
Startup Procedures
Pre-Start Inspection Checklist
Crucial pre-startup checks for indoor loop, outdoor loop, DHW, and electrical connections.
Heating Mode Startup
Procedures for starting and verifying the operation of the heat pump in heating mode.
Cooling Mode Startup
Procedures for starting and verifying the operation of the heat pump in cooling mode.
Final Inspection Checklist
Final checks after startup, including electrical box cover and access panels.
Troubleshooting Guide
Power Supply Troubleshooting
Diagnosing and resolving issues related to power supply and control board connectivity.
Alarm Troubleshooting
Detailed troubleshooting for common alarms like low/high pressure and loss of charge.
Fault Troubleshooting
Troubleshooting common faults related to digital inputs, outputs, sensors, and communication.
Compressor Troubleshooting
Troubleshooting common compressor issues such as failure to start or hard starting.
Heating Mode Operation Troubleshooting
Specific troubleshooting steps for issues encountered during heating mode operation.
Cooling Mode Operation Troubleshooting
Troubleshooting specific issues encountered during cooling mode operation.
EEV Troubleshooting
Detailed guide for troubleshooting the Electronic Expansion Valve (EEV) and related components.
Domestic Hot Water (Desuperheater) Troubleshooting
Troubleshooting common issues related to domestic hot water production via the desuperheater.
Repair Procedures
Pumpdown Procedure
Step-by-step guide for safely pumping down the refrigerant before performing repairs.
General Repair Procedure
General guidelines and precautions to follow during repair work on the refrigeration system.
Compressor Replacement Procedure
Detailed steps for replacing the compressor unit, including refrigerant handling.
Control Board Replacement Procedure
Instructions for safely removing and replacing the control board.
LCD Interface (Display) Board Replacement
Steps for replacing the LCD display board and its connection cable.
Model Specific Information: W-Series
W-Series Refrigerant Charge and Shipping
Details refrigerant charge, shipping weights, and dimensions for W-Series units.
W-Series Operating Temperature Limits
Specifies operating temperature limits for indoor and outdoor loops for W-Series.
W-Series Required Loop Flow Rates
Lists the required indoor and outdoor loop flow rates for W-Series models.
W-Series Sound Levels
Provides sound level data (dBA) for W-Series units at different distances.
W-Series Pressure Drop Data
Shows pressure drop data for W-Series units across various flow rates and loop fluids.
W-Series Standard Capacity Ratings
Presents standard capacity ratings for W-series units in closed loop and ground water modes.
Model Specific Information: WH-Series
WH-Series Refrigerant Charge and Shipping
Details refrigerant charge, shipping weights, and dimensions for WH-Series units.
WH-Series Operating Temperature Limits
Specifies operating temperature limits for indoor and outdoor loops for WH-Series.
WH-Series Required Loop Flow Rates
Lists the required indoor and outdoor loop flow rates for WH-Series models.
WH-Series Sound Levels
Provides sound level data (dBA) for WH-Series units at different distances.
WH-Series Pressure Drop Data
Shows pressure drop data for WH-Series models across various flow rates.
Model Specific Information: WP-Series
WP-Series Refrigerant Charge and Shipping
Details refrigerant charge, shipping weights, and dimensions for WP-Series units.
WP-Series Operating Temperature Limits
Specifies operating temperature limits for pool heating for WP-Series.
WP-Series Required Loop Flow Rates
Lists required outdoor and pool water loop flow rates for WP-Series models.
WP-Series Sound Levels
Provides sound level data (dBA) for WP-Series units at different distances.
WP-Series Pool Water Pressure Drop
Shows pool water pressure drop data for WP-Series models across various flow rates.
WP-Series Capacity Ratings
WP-Series Standard Capacity Ratings: HEATING
Presents standard heating capacity ratings for WP-series units.
WP-Series Standard Capacity Ratings: HEATING (METRIC)
Provides metric heating capacity ratings for WP-series units.
Appendix A: Gen2 Control Board Description
Control Board Connector Descriptions (Top)
Describes connectors located on the top of the control board.
Control Board Connector Descriptions (Left Side)
Describes connectors located on the left side of the control board.
Control Board Connector Descriptions (Bottom)
Describes connectors located on the bottom of the control board.
Control Board Connector Descriptions (Right Side)
Describes connectors located on the right side of the control board.
Appendix D: Updating Firmware
Method 1: Updating Firmware Using PC App
Detailed steps for updating firmware via the PC Application.
Reset System Parameters to Defaults
Procedures for resetting system parameters to factory defaults and reconfiguring settings.
Method 2: Updating Firmware Using Jumper Pins
Alternative method for updating firmware using jumper pins on the control board.
Warranty Information
W-Series Residential Limited Express Warranty
Details the limited express residential warranty terms for W-Series products.
WH/WP-Series Commercial Limited Express Warranty
Details the limited express commercial warranty terms for WH/WP-Series products.
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