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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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R4A3, WCA3**4
Safety Labeling and Signal Words
DANGER,
WARNING,
2
2
2
3
4
5
9
10
10
13
13
. . . . . . . . . . . . . . . . .
14
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 5301 02
6/07/13
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Summary of Contents for Arcoaire R4A3
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner R4A3, WCA3**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 Air Conditioner INSPECT NEW UNIT LOCATION After uncrating unit, inspect thoroughly for hidden damage. If damage is found, notify the transportation Check local codes for regulations concerning zoning, company immediately and file a concealed damage noise, platforms, and other issues. -
Page 3: Clearances
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”... -
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 CAUTION The refrigerant line set must be properly sized to assure maximum efficiency and proper oil circulation. UNIT OPERATION HAZARD Refer to Product Specifications and Long Line Applications Guideline for line set sizing. Failure to follow this caution may result in NOTE: Total line set length must not exceed 200 feet improper product operation.
- Page 7 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner F. SERVICE VALVES CAUTION Service valves are closed and tube stubs are plugged from the factory. Outdoor units are shipped with a UNIT OPERATION HAZARD refrigerant charge sealed in the unit. Leave the service valves closed until all other refrigerant system work is Failure to follow this caution may result in complete or the charge will be lost.
- Page 8 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner Line set and indoor coil should be evacuated using the 5. Repeat this procedure as indicated in Figure 8. recommended deep vacuum method of 500 microns. If 6. After the final evacuate sequence, confirm there deep vacuum equipment is not available, the alternate are no leaks in the system.
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Page 9: Electrical Wiring
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner ELECTRICAL WIRING Wiring Connections Make all outdoor electrical supply (Line Voltage) WARNING connections with raintight conduit and fittings. Most codes require a disconnect switch outdoors within sight of the unit. Consult local codes for special requirements. ELECTRICAL SHOCK HAZARD Route electrical supply (Line Voltage) wiring through Failure to follow this warning could result in... -
Page 10: Start−Up Procedure
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner Figure 10 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... - Page 11 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner A. UNITS WITH COOLING MODE TXV 5. Measure indoor air (entering indoor coil) wet−bulb temperature with a sling psychrometer. Units installed with cooling mode TXV require charging by the subcooling method. 6. Refer to 11. Find outdoor temperature and evaporator entering air wet−bulb temperature.
- Page 12 INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner Figure 12 SUCTION PRESSURE AT SERVICE PORT PSIG SUCTION PRESSURE AT SERVICE PORT kPA 1005 SUPER- SUPER- HEAT HEAT REQUIRED SUCTION TUBE TEMPERATURE REQUIRED SUCTION TUBE TEMPERATURE ˚F ˚C TEMP ˚C TEMP ˚F (MEASURED AT LOW-SIDE SERVICE PORT) (MEASURED AT LOW-SIDE SERVICE PORT) Figure 13...
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Page 13: Sequence Of Operation
INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner SEQUENCE OF OPERATION The Comfort Alert device operates by monitoring the compressor power leads and the thermostat demand With power supplied to indoor and outdoor units, signal (Y terminal). It draws constant 24 VAC power at transformer is energized. -
Page 14: 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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