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Mars HRG14 P Series User Manual

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Installation and Operation Manual - HRG14xxS1P
1
Page 1 of 11506318-03P Issue 1850
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INSTALLATION INSTRUCTIONS
HRG14*P SPLIT SYSTEM HEAT PUMP
(R410A REFRIGERANT)
(P) 506318-03P
*P506318-03P*
Manufactured By
Comfort-Aire / Century
1900 Wellworth Ave.
Jackson, MI 49203
This manual must be left with the homeowner for future reference.
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury or death.
Installation or repairs made by unqualied persons can
result in hazards to you and others. Installation MUST
conform with local building codes and with the National
Electrical Code NFPA 70/ANSI C1-1993 or current
edition and Canadian Electrical Code Part 1 CSA C22.1.
WARNING
Improper installation, adjustment, alteration, service
or maintenance will void the warranty. The qualied
installer or agency must use factory-authorized kits
or accessories when added to this products. Refer to
the individual instructions included with the specic
accessory kit.
CAUTION
These instructions are intended as a general guide and
do not supersede national, state or local codes in any
way.
NOTE
These instructions and warranty are to be given to the
owner or displayed near the indoor air handler unit.
NOTE TO INSTALLING DEALER
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out
and tag switch with a suitable warning label. Electrical
shock can cause personal injury or death.
WARNING
Table of Contents
Safety Precautions ......................................................2
Installation ...................................................................2
Electrical Connections .................................................5
Start-Up Procedure......................................................6
Operation .....................................................................7
Homeowner’s Information .........................................10
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Mars HRG14 P Series Specifications

General IconGeneral
Heating Capacity14 kW
Cooling Capacity12 kW
RefrigerantR410A
SeriesP Series
TypeHeat Pump

Summary

Safety Precautions

Installation

Outdoor Unit Mounting and Clearances

Guidelines for positioning the outdoor unit on a solid pad, elevation, rooftop mounting, and required clearances.

Refrigeration Line Set Installation

Recommendations for selecting line set diameters, proper routing, insulation, and avoiding contact with structures.

Brazing and Leak Detection

Procedure for making braze connections with nitrogen flow and methods for checking refrigerant lines for leaks.

Evacuation and Service Valve Operation

Instructions for evacuating the system to 300 microns and opening service valves after installation.

Electrical Connections

Control Wiring

Details on low voltage control wiring, thermostat connections, and separation from power leads.

Heat Pump Application with Electric Heat

Configuration for emergency heat mode using thermostat settings and jumpers.

Start-Up Procedure

Adjusting Refrigerant Charge

Guidance on adjusting refrigerant charge based on line set length and measuring subcooling.

Cooling and Heating Mode Charge Checks

Methods for checking system charge in cooling mode and heating mode at specific ambient temperatures.

Operation

Emergency Heat Function

How the emergency heat feature works and when to use it, including after power outages.

Defrost System Operation

Explanation of the defrost system components (thermostat, control) and their timing functions.

Defrost Control Board Diagnostics

Information on diagnostic LEDs, pressure switch functions, and lockout features.

Homeowner's Information

Heat Pump Operation Characteristics

Explains unique characteristics like frost formation, defrost cycles, and humidity removal.

Thermostat Operation and Settings

Guidance on setting thermostat controls like temperature levers, fan switch, and system switch.

Maintenance and Troubleshooting

Regular Maintenance Requirements

Checks recommended for qualified service technicians, including motor, coils, and refrigerant.

Air Filter and Coil Cleaning

Instructions for inspecting and cleaning air filters, indoor coils, and condensate drains.

Condenser Coil Care and Painted Surfaces

Guidance on cleaning condenser coils and maintaining painted surfaces with wax.

System Troubleshooting Steps

Steps to take before calling for service, including thermostat settings and component checks.

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