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Mars HRG14 P Series Installation Instructions Manual

Split system heat pump

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Installation and Operation Manual - HRG14xxS1P
HRG14*P SPLIT SYSTEM HEAT PUMP
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.

Table of Contents

Safety Precautions ......................................................2
Installation ...................................................................2
Electrical Connections .................................................5
Start-Up Procedure......................................................6
Operation .....................................................................7
Homeowner's Information .........................................10
NOTE TO INSTALLING DEALER
These instructions and warranty are to be given to the
owner or displayed near the indoor air handler unit.
Improper installation, adjustment, alteration, service
or maintenance will void the warranty. The qualified
installer or agency must use factory-authorized kits
or accessories when added to this products. Refer to
the individual instructions included with the specific
accessory kit.
Manufactured By
Comfort-Aire / Century
1900 Wellworth Ave.
Jackson, MI 49203
506318-03P
INSTALLATION INSTRUCTIONS
(R410A REFRIGERANT)
This manual must be left with the homeowner for future reference.
CAUTION
Save these instructions for future reference
These instructions are intended as a general guide and
do not supersede national, state or local codes in any
way.
Installation or repairs made by unqualified 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.
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.
*P506318-03P*
1
Issue 1850
NOTE
WARNING
WARNING
(P) 506318-03P
Page 1 of 11

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Summary of Contents for Mars HRG14 P Series

  • Page 1: Table Of Contents

    Installation and Operation Manual - HRG14xxS1P INSTALLATION INSTRUCTIONS HRG14*P SPLIT SYSTEM HEAT PUMP (R410A REFRIGERANT) 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.
  • Page 2: Safety Precautions

    Installation and Operation Manual - HRG14xxS1P NOTE: Maximum liquid-line size is 3/8 in. O.D. for all These units are designed for use in residential and light commercial type buildings. Heat Pumps may only residential applications including long lines. be installed with indoor combinations listed in the Air Conditioning, Heating and Refrigeration Institute (AHRI) Outdoor Section Directory of Certified Products.
  • Page 3 Installation and Operation Manual - HRG14xxS1P Liquid Vapor Capacity Connections Tube Connections Tube Dia. Dia. Dia. Dia. -018 3/8” 3/8” 3/4” 3/4” -024 3/8” 3/8” 3/4” 3/4” -030 3/8” 3/8” 3/4” 3/4” -036 3/8” 3/8” 7/8” 7/8” -042 3/8” 3/8” 7/8”...
  • Page 4 Installation and Operation Manual - HRG14xxS1P Before making braze connections, be sure all joints are 1. Connect the vacuum pump to the center hose of the clean. Before heat is applied for brazing, dry nitrogen manifold gauge set, the low-pressure manifold gauge should be flowing through the tubing to prevent oxidation to the vapor service valve and the high pressure and scale formation on the inside of the tubing.
  • Page 5: Electrical Connections

    Installation and Operation Manual - HRG14xxS1P Control Wiring Electrical Connections The control voltage is 24 VAC. NEC Class I insulated 18 AWG is required for control wiring. For lengths longer than 150 feet, contact your local distributor for technical service. WARNING Ensure the room thermostat is properly installed per instructions shipped with room thermostat.
  • Page 6: Start-Up Procedure

    Installation and Operation Manual - HRG14xxS1P Before final adjustment is made to the refrigerant charge, Start-Up Procedure it is imperative that proper indoor airflow be established. Airflow will be higher across a dry coil versus a wet coil. Check to ensure: Blower charts are calculated with a dry or wet coil basis.
  • Page 7: Operation

    Installation and Operation Manual - HRG14xxS1P Operation The outdoor unit and indoor blower cycle on demand FIELD SELECT TIMING PINS from the room thermostat. When the thermostat blower switch is in the ON position, the indoor blower operates TEST DIAGNOSTIC continuously.
  • Page 8 Installation and Operation Manual - HRG14xxS1P Low Pressure Switch (LO-PS) — When the low pressure During a single demand cycle, the defrost control will lock out the unit after the fifth time that the circuit is interrupted switch trips, the defrost board will cycle off the compressor, by any pressure switch wired to the control board.
  • Page 9 Installation and Operation Manual - HRG14xxS1P Figure 4. 14 SEER Wiring Diagram 506318-03P Issue 1850 Page 9 of 11...
  • Page 10: Homeowner's Information

    Installation and Operation Manual - HRG14xxS1P Homeowner’s Information different manufacturers. The information below is typical for most thermostats. Ask your dealer for specific information WARNING regarding the model of thermostat installed. ELECTRICAL SHOCK HAZARD! Temperature Setting Levers Turn OFF electric power to unit before performing any maintenance or removing panels or doors.
  • Page 11 Installation and Operation Manual - HRG14xxS1P Important System Information of the air. Clogged condenser coils will lower the efficiency of your unit and could cause damage to the condenser. • Your system should never be operated without a clean air filter properly installed. Periodically, debris should be brushed from the condenser •...
  • Page 12 Installation and Operation Manual - HRG14xxS1P Table 2 - Indoor Unit Matches and Subcooling Charge Levels and Additional Charge** Additional Additional Subcooling Subcooling Charge Charge Indoor Matchup Indoor Matchup Cool Cool Heat Heat lbs / oz lbs / oz (+/- 1°F) (+/- 1°F) (+/- 5°F) (+/- 5°F)
  • Page 13 Installation and Operation Manual - HRG14xxS1P Page Intentionally Left Blank...
  • Page 14 Installation and Operation Manual - HRG14xxS1P 1900 Wellworth Ave., Jackson, MI 49203 • Ph. 517-787-2100 • www.marsdelivers.com 8/2022...