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Table of Contents
INSTALLATION INSTRUCTIONS
R−410A Split System Heat Pump
These instructions must be read and understood completely before attempting installation.
DANGER, WARNING, CAUTION, and
NOTE
The
signal
words
CAUTION, and NOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manuals that may
apply to the product.
DANGER − Immediate hazards which will result in
severe personal injury or death.
WARNING − Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION − Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE − Used to highlight suggestions which
will result in enhanced installation, reliability, or
operation.
TABLE OF CONTENTS
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Product Family: R4H3, WCH3**4
Safety Labeling and Signal Words
DANGER,
WARNING,
2
2
2
2
2
3
8
10
12
12
16
16
. . . . . . . . . . . . . . .
17
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:
WARNING
WARNING
!
The signal word CAUTION is used throughout this
manual in the following manner:
CAUTION
!
Signal Words on Product Labeling
Signal words are used in combination with colors
and/or pictures on product labels.
WARNING
!
DEATH, PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD
Failure to carefully read and follow this warning
could result in equipment malfunction, property
damage, personal injury and/or death.
Installation or repairs made by unqualified per-
sons could result in equipment malfunction, prop-
erty damage, personal injury and/or death.
The information contained in this manual is in-
tended for use by a qualified service technician fa-
miliar with safety procedures and equipped with
the proper tools and test instruments.
Installation must conform with local building
codes and with the National Electrical Code
NFPA70 current edition or Canadian Electrical
Code Part 1 CSA C.22.1.
428 01 5301 05
2/6/14
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Table of Contents
Related Manuals for Grandaire R4H3 Series
Summary of Contents for Grandaire R4H3 Series
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Product Family: R4H3, WCH3**4 These instructions must be read and understood completely before attempting installation. Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE Signal Words in Manuals The signal word WARNING is used throughout this signal words DANGER,... -
Page 2: Inspect New Unit
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump INSPECT NEW UNIT LOCATION After uncrating unit, inspect thoroughly for hidden Check local codes for regulations concerning zoning, damage. If damage is found, notify the transportation noise, platforms, and other issues. company immediately and file a concealed damage Locate unit away from fresh air intakes, vents, or claim. -
Page 3: Refrigeration System
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump C. FASTENING UNIT DOWN CAUTION If conditions or local codes require the unit be attached in place, remove the knockouts in the base pan and install PROPERTY DAMAGE HAZARD tie down bolts through the holes (refer to Figure 2). Contact local distributor for hurricane hold−down details and Failure to follow this caution may result in property the P.E. - Page 4 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Installing with Indoor Piston − cooling operation. B. REFRIGERANT LINE SETS The refrigerant line set must be properly sized to assure (Heat pumps also use an outdoor piston for heating maximum efficiency and proper oil circulation. operation, refer to section F.) Refer to Product Specifications and Long Line Check piston size shipped with indoor unit to see if it...
- Page 5 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump When routing refrigerant lines through a foundation or Along floor or ceiling joists, suspend refrigerant lines so wall, do not allow refrigerant lines to come in direct that they do not contact the building structure, water contact with the building structure.
- Page 6 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump will be lost. Leave the plugs in place until line set tubing is helps prevent overheating and damage to valve seals ready to be inserted. (refer to Figure 5). Replace valve core when brazing is completed.
- Page 7 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump If vacuum must be interrupted during the evacuation Figure 7 Triple Evacuation Sequence procedure, always break vacuum with dry nitrogen. Deep Vacuum Method EVACUATE The deep vacuum method requires a vacuum pump capable of pulling a vacuum to 500 microns and a vacuum BREAK VACUUM WITH DRY NITROGEN gauge capable of accurately measuring this vacuum level.
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Page 8: Electrical Wiring
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump ELECTRICAL WIRING Wiring Connections Make all outdoor electrical supply (Line Voltage) connections with raintight conduit and fittings. Most WARNING codes require a disconnect switch outdoors within sight of the unit. Consult local codes for special requirements. Route electrical supply (Line Voltage) wiring through ELECTRICAL SHOCK HAZARD knockout hole in bottom of Control Box. - Page 9 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Figure 10 Typical Thermostat (Control Circuit) Connections NOTE: WHEN USING OUTDOOR THERMOSTATS, W MUST BE ENERGIZED WHEN REQUESTING SUPPLEMENTAL HEAT. SYSTEMS WITH ONE OUTDOOR THERMOSTAT SYSTEMS WITH TWO OUTDOOR THERMOSTATS OUTDOOR INDOOR THERMOSTAT DEFROST THERMOSTAT INDOOR...
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Page 10: Defrost System
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump DEFROST SYSTEM 1. Jumper across the DFT terminals on the defrost A. DEFROST THERMOSTAT board (Figure 12). With this method, the defrost The defrost thermostat is factory installed on a short tube thermostat is removed from the circuit, and operation stub extending from the coil end plate. - Page 11 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Figure 12 Defrost Control Board H9C1 30 60 90 T1 C C O SPEEDUP Specifications subject to change without notice. 428 01 5301 05...
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Page 12: Start−Up Procedure
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump START−UP PROCEDURE NOTE: If outdoor unit has a 2−speed fan motor, motor will operate in low speed when outdoor 1. Set indoor thermostat selector switch to OFF. ambient temperature is below 82_F (28_C). Pull 2. - Page 13 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump 11. If outdoor air temperature or pressure at suction C. HEATING MODE valve changes, charge to new suction line To check system operation during heating cycle, refer to temperature indicated on chart. the Tech Label on outdoor unit. This chart indicates 12.
- Page 14 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Figure 15 Rating Plate (required) Subcooling Temperature ° F (° C) (° C) (° C) (° C) (° C) (° C) (° C) ° F ° F ° F ° F Measured Liquid Pressure (psig) R−410A Required Liquid Line Temperature °...
- Page 15 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Figure 16 - ADDITIONAL SUBCOOLING 13 SEER Subcooling Delta from Rating Plate Value OUTDOOR UNIT SIZE INDOOR MODELS ED*4X18B**/EA*4X18*14A* EN(A,D)4X18*14** FEM4(P,X)18**A*+TXV F(E,S)A4X18**A* FXM4X18**A* FS(M,U)4P18**A*+TXV ED*4X24***/EA*4X24*(14,17)A* EN*4X24***** EHD4X24A** FEM4P24**A*+TXV ...
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Page 16: Sequence Of Operation
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump SEQUENCE OF OPERATION MAINTENANCE A. COOLING MODE Condensate Drain During the cooling season, check monthly for free flow of On a call for cooling, the thermostat makes circuits R−O, drainage and clean if necessary. R−Y, and R−G. -
Page 17: R−410A Quick Reference Guide
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump R−410A QUICK REFERENCE GUIDE R−410A refrigerant operates at 50% − 70% higher pressures than R−22. Be sure that servicing equipment and replacement components are designed to operate with R−410A. R−410A refrigerant cylinders are rose colored. ...
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