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Table of Contents
- 1 Table of Contents
- 2 Inspect New Unit
- 3 Safety Considerations
- 4 Location
- 5 Unit Support
- 6 Refrigeration System
- 7 Electrical Wiring
- 8 Start−Up Procedure
- 9 Refrigerant Charge
- 10 Sequence of Operation
- 11 Troubleshooting
- 12 Maintenance
- 13 Comfort Alertt Diagnostics Codes
- 14 R−410A Quick Reference Guide
- Download this manual
INSTALLATION INSTRUCTIONS
R−410A Split System Air Conditioner
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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Clearances
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N4A3, C4A3, H4A3, T4A3,
NXA6, CXA6, HXA6, TXA6
Safety Labeling and Signal Words
DANGER,
WARNING,
2
2
2
2 − 3
4
5 − 9
10 − 11
12
12 − 15
16
16
16
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17
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18
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,
property 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.
421 01 5103 00
May 2010
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Summary of Contents for Tempstar N4A3
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner N4A3, C4A3, H4A3, T4A3, NXA6, CXA6, HXA6, TXA6 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... -
Page 2: Inspect New Unit
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner INSPECT NEW UNIT After uncrating unit, inspect thoroughly for hidden company immediately and file a concealed damage damage. If damage is found, notify the transportation claim. SAFETY CONSIDERATIONS Consult a qualified installer, service agency, or the WARNING dealer/distributor for information and assistance. - Page 3 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner 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 Air Conditioner UNIT SUPPORT NOTE: Unit must be level | 2 degrees {a inch rise or fall CAUTION per foot of run (10mm rise or fall per 305 mm of run) }or compressor may not function properly. PROPERTY DAMAGE HAZARD A. -
Page 5: Refrigeration System
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner REFRIGERATION SYSTEM A. COMPONENT MATCHES Installing with Indoor Piston − cooling operation. Check piston size shipped with indoor unit to see if it Check to see that the proper system components are in matches required indoor piston size. - Page 6 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner B. REFRIGERANT LINE SETS C. ROUTING AND SUSPENDING REFRIGERANT LINES The refrigerant line set must be properly sized to assure maximum efficiency and proper oil circulation. Run refrigerant lines as straight and direct as possible, Refer to Product Specifications and Long Line avoiding unnecessary bends and turns.
- Page 7 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner refrigerant charge sealed in the unit. Leave the service CAUTION valves closed until all other refrigerant system work is complete or the charge will be lost. Leave the plugs in place until line set tubing is ready to be inserted. UNIT OPERATION HAZARD Service valve bodies are brass and tube stubs are Failure to follow this caution may result in im-...
- Page 8 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner H. EVACUATING LINE SET AND INDOOR COIL Triple Evacuation Method The unit is shipped with a factory refrigerant charge. The The triple evacuation method should only be used when liquid line and suction line service valves have been closed system does not contain any water in liquid form and after final testing at the factory.
- Page 9 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner I. OPENING SERVICE VALVES NOTE: These are not back−seating valves. It is not necessary to force the stem tightly against the rolled lip. Outdoor units are shipped with a refrigerant charge sealed in the unit. Opening the service valves releases The service valve cap is a primary seal for the valve and this charge into the system.
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Page 10: Electrical Wiring
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner ELECTRICAL WIRING Wiring Connections WARNING Make all outdoor electrical supply (Line Voltage) connections with raintight conduit and fittings. Most ELECTRICAL SHOCK HAZARD codes require a disconnect switch outdoors within sight of the unit. Consult local codes for special requirements. Failure to turn off the main (remote) electrical dis- connect device could result in personal injury or Route electrical supply (Line Voltage) wiring through... - Page 11 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner Figure 11 Typical Thermostat Connections THERMOSTAT FURNACE AIR CONDITIONER 24 VAC HOT 24 VAC COM W/W1 HEAT STAGE 1 Y/Y2 COOL STAGE 1 INDOOR FAN THERMOSTAT FAN COIL AIR CONDITIONER 24 VAC HOT 24 VAC COM W/W1 HEAT STAGE 1...
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Page 12: Start−Up Procedure
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner START−UP PROCEDURE 1. Set indoor thermostat selector switch to OFF. 4. Set indoor thermostat at desired temperature. Be sure setpoint is below indoor ambient temperature 2. Turn ON all electrical disconnect devices. or thermostat will not call for cooling. 3. - Page 13 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner A. UNITS WITH COOLING MODE TXV B. UNITS WITH INDOOR PISTON Units installed with indoor pistons require charging by the Units installed with cooling mode TXV require charging superheat method. by the subcooling method. The following procedure is valid when indoor airflow is 1.
- Page 14 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner Figure 12 Superheat Charging − AC Only EVAPORATOR ENTERING AIR TEMPERATURE (_ OUTDOOR TEMP (_ — — — — — — — — — — — — — — — — — — —...
- Page 15 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner Figure 14 Rating Plate (required) Subcooling Temperature ° F (° C) ° F (° C) ° F (° C) ° F (° C) ° F (° C) (° C) (° C) Measured Liquid Pressure (psig) R−410A Required Liquid Line Temperature °...
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Page 16: Sequence Of Operation
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner SEQUENCE OF OPERATION With power supplied to indoor and outdoor units, When thermostat is satisfied, its contacts open, transformer is energized. de−energizing contactor and blower relay. Compressor and motors stop. On a call for cooling, the thermostat makes circuits R−Y and R−G. - Page 17 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner Figure 16 Comfort Alertt Diagnostics (some models) Status LED Status LED Description Status LED Troubleshooting Information Green “POWER” Module has power Supply voltage is present at module terminals Red “TRIP” Thermostat demand signal 1.
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Page 18: R−410A Quick Reference Guide
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner 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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