KeepRite R?410A Installation Instructions Manual

R−410a two−stage split system air conditioner

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INSTALLATION INSTRUCTIONS
R−410A Two−Stage 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
Inspect New Unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Location
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clearances
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Support
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigeration System
. . . . . . . . . . . . . . . . . . . . . . . .
Electrical Wiring
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Airflow Selection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−up Procedure
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Charge
. . . . . . . . . . . . . . . . . . . . . . . . .
Sequence of Operation
. . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Operation
. . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R−410A Quick Reference Guide
Product Family: H4A6, C4A6, T4A6
H4A8, C4A8, T4A8
Safety Labeling and Signal Words
DANGER,
WARNING,
2 − 3
4 − 8
9 − 10
10
11
11 − 12
12
13 − 14
. . . . . . . . . . . . . . . . .
15
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.
2
WARNING
!
2
2
PERSONAL INJURY, AND/OR PROPERTY DAM-
AGE HAZARD
4
Failure to carefully read and follow this warning
could result in equipment malfunction, property
damage, personal injury and/or death.
8
Installation or repairs made by unqualified per-
9
sons could result in equipment malfunction, prop-
erty damage, personal injury and/or death.
9
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
421 01 6002 01
Oct 2009

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Summary of Contents for KeepRite R?410A

  • Page 1 INSTALLATION INSTRUCTIONS R−410A Two−Stage Split System Air Conditioner Product Family: H4A6, C4A6, T4A6 H4A8, C4A8, T4A8 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

    Failure to follow this caution may result in proper- ty damage R−410A systems operate at higher pressures than R−22 systems. When working with R−410A sys- tems, use only service equipment and replace- ment components specifically rated or approved for R−410A service.
  • Page 3 INSTALLATION INSTRUCTIONS R−410A, Two−Stage Split System Air Conditioner Figure 1 Clearances (various examples) Wall Wall 6” (152mm) 24” (610mm) Service 24” 18” (610mm) (457mm) Service 6” 18” (152mm) (457mm) 18” (457mm) 18” (457mm) Wall Wall 6” 6” (152mm) (152mm) 24”...
  • Page 4: Unit Support

    A typical TXV installation is shown in Figure 3. R−410A outdoor units can only be used with R−410A specific indoor coils. If there is a refrigerant mis−match, consult the indoor coil manufacturer to determine if a refrigerant conversion kit is available for the indoor coil.
  • Page 5 INSTALLATION INSTRUCTIONS R−410A, Two−Stage Split System Air Conditioner WARNING Figure 3 Typical TXV Installation PERSONAL INJURY HAZARD INDOOR Failure to follow this warning could result in per- COIL EQUALIZER sonal injury and/or death. TUBE Relieve pressure and recover all refrigerant before servicing existing equipment, and before final unit disposal.
  • Page 6 INSTALLATION INSTRUCTIONS R−410A, Two−Stage 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...
  • Page 7 INSTALLATION INSTRUCTIONS R−410A, Two−Stage 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 system does not contain any water in liquid form and closed after final testing at the factory.
  • Page 8: Electrical Wiring

    INSTALLATION INSTRUCTIONS R−410A, Two−Stage Split System Air Conditioner I. OPENING SERVICE VALVES After the refrigerant charge has bled into the system, open the Liquid service valve. Outdoor units are shipped with a refrigerant charge sealed in the unit. Opening the service valves releases NOTE: These are not back−seating valves.
  • Page 9: Refrigerant Charge

    INSTALLATION INSTRUCTIONS R−410A, Two−Stage Split System Air Conditioner AIRFLOW SELECTION Two−stage compressor operation requires two different NOTE: Optimal comfort, efficiency, and reliability will only indoor airflow settings for proper operation. This outdoor be achieved when the indoor airflow is properly set for unit is designed for use only with an indoor blower that can both low−stage and high−stage operation.
  • Page 10: Sequence Of Operation

    (° C) (° C) Measured Liquid Pressure (psig) R−410A Required Liquid Line Temperature ° F (° C) SEQUENCE OF OPERATION With power supplied to indoor and outdoor units, NOTE: If indoor unit is equipped with a time−delay relay transformer is energized.
  • Page 11: Compressor Operation

    INSTALLATION INSTRUCTIONS R−410A, Two−Stage Split System Air Conditioner COMPRESSOR OPERATION The basic scroll design has been modified with the Full capacity is achieved by blocking these vents, thus addition of an internal unloading mechanism that opens increasing the displacement to 100%. A DC solenoid in a by−pass port in the first compression pocket, effectively...
  • Page 12 INSTALLATION INSTRUCTIONS R−410A, Two−Stage Split System Air Conditioner Two−Stage Compressor Resistance (winding resistance) at 70° F +/− 20° F (21°C +/− 11° C) Winding *4A624 *4A836 *4A648 *4A660 Start (S−C) 1.40 1.29 1.52 0.60 Run (R−C) 1.32 0.89 0.64 0.49 NOTE: The rectifier for the DC solenoid is contained 2.
  • Page 13 INSTALLATION INSTRUCTIONS R−410A, Two−Stage Split System Air Conditioner Figure 13 Comfort Alertt UltraTecht Diagnostics 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.
  • Page 14 INSTALLATION INSTRUCTIONS R−410A, Two−Stage Split System Air Conditioner Status LED Status LED Description Status LED Troubleshooting Information Yellow “ALERT” Open High Voltage Circuit 1. Outdoor unit power disconnect is open Flash Code 5 2. Compressor circuit breaker or fuse(s) is open 3.
  • Page 15 R−410A, Two−Stage 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.

This manual is also suitable for:

H4a6T4a6C4a6H4a8C4a8T4a8

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