Table of Contents
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INSTALLATION INSTRUCTIONS
R−410A Split System Heat Pump
Product Family: R4H3, R4H4, WCH3**4, WCH**4
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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Safety Labeling and Signal Words
DANGER,
WARNING,
2 − 3
5 − 9
8 − 10
11 − 12
13
13 − 17
17
17
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18
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:
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
!
2
DEATH, PERSONAL INJURY, AND/OR PROPERTY
2
DAMAGE HAZARD
2
Failure to carefully read and follow this warning
could result in equipment malfunction, property
4
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.
WARNING
428 01 5302 00
9/12/13
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Table of Contents
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Product Family: R4H3, R4H4, WCH3**4, WCH**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... -
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 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Figure 1 Clearances (various examples) Wall Wall 6” 24” (152mm) (610mm) Service 24” 18” (610mm) (457mm) Service 6” 18” (152mm) (457mm) 18” (457mm) 18” (457mm) Wall Wall 6” 6” (152mm) (152mm) 24” 24” 18”...
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Page 4: Unit Support
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump UNIT SUPPORT C. FASTENING UNIT DOWN If conditions or local codes require the unit be attached in NOTE: Unit must be level " 2 degrees {inch rise or 3/8 place, remove the knockouts in the base pan and install fall per foot of run (10mm rise or fall per 305 mm of run) } or tie down bolts through the holes (refer to Figure 2). -
Page 5: Refrigeration System
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump REFRIGERATION SYSTEM If it is necessary to add refrigerant line in the field, use dehydrated dry, sealed, deoxidized, copper A typical TXV installation is shown in Figure 3. refrigeration tubing. Do not use copper water pipe. Do not remove rubber plugs or caps from copper tubing Figure 3 Typical TXV Installation... - Page 6 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Figure 4 Routing and Suspending Refrigerant Lines JOIST OUTDOOR WALL INDOOR WALL HANGER STRAP (AROUND SUCTION CAULK INSULATION TUBE ONLY) LIQUID TUBE SUCTION TUBE SUCTION TUBE INSULATION 1” (25mm) MIN LIQUID TUBE THROUGH THE WALL SUSPENSION CAUTION Liquid Line Filter−Drier...
- Page 7 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump 1. Remove plastic cap holding piston in piston body of CAUTION liquid service valve. 2. Check that piston size (stamped on side of piston) matches with number listed on unit rating plate. PRODUCT DAMAGE HAZARD Return piston to piston body of liquid service valve Failure to follow this caution may result in product (either direction).
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Page 8: Electrical Wiring
INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump I. OPENING SERVICE VALVES Deep Vacuum Gauge Response Figure 9 Outdoor units are shipped with a refrigerant charge and System Conditions sealed in the unit. Opening the service valves releases this charge into the system. 5000 NOTE: Open the Suction service valve first. - Page 9 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Wiring Connections Electrical Supply (Line Voltage) Figure 9 Make all outdoor electrical supply (Line Voltage) Connections connections with raintight conduit and fittings. Most codes require a disconnect switch outdoors within sight of DISCONNECT PER NEC AND/OR the unit.
- Page 10 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 11: 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 12 INSTALLATION INSTRUCTIONS R−410A Split System Heat Pump Figure 12 Defrost Control Board H9C1 ® 30 60 90 T1 C C O SPEEDUP 428 01 5302 00...
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Page 13: 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 14 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 15 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 16 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 17: 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 18: 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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