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Maritime Geothermal nordic dx-45 User Manual

Maritime Geothermal nordic dx-45
36 pages
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Maritime Geothermal Ltd.
P.O. Box 413
Petitcodiac, N.B. E0A 2H0
Maritime
Geothermal Ltd.
NORDIC® models DX-45-55-65
High Efficiency Direct Expansion
Geothermal Heat Pumps
Refrigerant Filled Copper Heat Exchanger Loop
Heat Pump System Requirements ..... 3 Vertical Case Dimensions ......... 18 Trouble Shooting Guide .............. 24
Optimum Placement ........................... 7 Horizontal Dimensions ........... 19 Electrical Schemetic ..................... 27
Instaling DX linesets .......................... 9 Electrical Requirements .......... 20 Installer Wiring ............................. 28
Vacuuming & Charging ................... 11 Component Layout ................ 21 Plenum Heater Wiring ................... 29
Built-in refrigerant safety ctrls............ 13 Performance Ratings ............... 22 Duct sizing Guide ....................... 30
Theory of Operation............................ 15 CFM available ......................... 23 Warranty ................................... 31
Table of Contents
Installation
Manual
Revision 1.4 12-Feb-00
Email:nordic@auracom.com
www.discribe.ca/nordic
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Maritime Geothermal nordic dx-45 Specifications

General IconGeneral
CategoryHeat Pump
ModelNordic DX-45
RefrigerantR410A
Compressor TypeScroll
COP4.5
Heating Capacity45, 000 BTU/h
Cooling Capacity42, 000 BTU/hr
Water Flow Rate11 GPM
Max Current30 A
Sound Pressure Level52 dB(A)
Operating Temperature Range (Cooling)40-120°F

Summary

NORDIC DX Heat Pump System Prerequisites

Horizontal Loop Fields

Details for planning and installing horizontal ground loop systems for DX heat pumps.

Introduction to DX Technology

DX Advantages Over Current Technology

Highlights the key benefits of Direct Expansion (DX) technology compared to conventional systems.

DX Advantages Over Current Technology

More Reliable

Explains the reliability benefits of DX technology compared to conventional systems.

More Efficient

Details the efficiency gains achieved by DX technology in heat transfer.

Horizontal Trench Requirements

Installation Procedures

Vacuuming System

Steps for properly vacuuming the system to remove moisture and air before charging.

Charging System

Procedures for accurately charging the system with the correct amount of refrigerant.

Safety Controls

Starting the Heat Pump

Theory of Operation

Capacity Data DX-45-HAC

Capacity Data DX-55-HAC

Capacity Data DX-65-HAC

NORDIC DX Heat Pump Trouble Shooting Guide

Compressor Not Operating

Troubleshooting steps for issues related to the compressor failing to operate.

Compressor "Short Cycles"

Diagnosing and resolving problems causing the compressor to cycle on and off frequently.

Unit Trips Off on Low Suction Pressure Control (Heating)

Addressing issues causing the unit to trip due to low suction pressure during heating.

Low or No Air Conditioning

Troubleshooting steps for scenarios with insufficient or no cooling output from the unit.

Insufficient Hot Water

Identifying and resolving problems related to the heat pump not producing enough hot water.

NORDIC DX Series - Schematic Wiring Diagram

NORDIC DX Series Electrical Box Connections

Thermostat Operation

NORDIC Electronic Control Board

Method of Operation - Heating Mode

High Low Pressure Control Operation

Method of Operation - Cooling Mode

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