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513 01 3103 00
EXPLOSION, SAFETY AND ENVIRONMENTAL HAZARD
Failure to follow this warning could result in personal injury,
death or equipment damage.
This system uses R--410A refrigerant which has higher
operating pressures than R--22 and other refrigerants. No
other refrigerant may be used in this system. Gauge set,
hoses, and recovery system must be designed to handle
R--410A. If you are unsure, consult the equipment
manufacturer.
WARNING
!
If oil is detected or if low cooling performance is suspected,
leak--test all refrigerant tubing using an electronic leak--detector,
halide torch, or liquid--soap solution. If a refrigerant leak is
detected, refer to Check for Refrigerant Leaks section.
If no refrigerant leaks are found and low cooling performance is
suspected, refer to Checking and Adjusting Refrigerant Charge
section.
EVAPORATOR AIRFLOW
The heating and/or cooling air--flow does not require checking
unless improper performance is suspected. If a problem exists, be
sure that all supply-- and return--air grilles are open and free from
obstructions, and that the air filter is clean. When necessary, refer
to Indoor Airflow and Airflow Adjustments section to check the
system airflow.
R--410A ITEMS
The indoor metering device is a TXV type device.
PRESSURE SWITCHES
Pressure switches are protective devices wired into the control
circuit (low voltage). They shut off compressor if abnormally high
or low pressures are present in the refrigeration circuit. These
pressure switches are specifically designed to operate with
R--410A systems. R--22 pressure switches must not be used as
replacements for the R--410A air conditioner.
LOSS OF CHARGE/LOW--PRESSURE SWITCH (AIR CONDI-
TIONER ONLY)
This switch is located on the liquid line and protects against low
suction pressures caused by such events as loss of charge, low
airflow across indoor coil, dirty filters, etc. It opens on a pressure
drop at about 20 psig (957 Pa). If system pressure is above this,
switch should be closed.
To check switch:
1. Turn off all power to unit.
2. Disconnect leads on switch.
3. Apply ohmmeter leads across switch. You should have
continuity on a good switch.
NOTE
:
Because these switches are attached to refrigeration
system under pressure, it is not advisable to remove this device
for troubleshooting unless you are reasonably certain that a
problem exists. If switch must be removed, remove and recover
all system charge so that pressure gauges read 0 psi (0 Pa).
Never open system without breaking vacuum with dry nitrogen.
HIGH--PRESSURE SWITCH
The high--pressure switch is located in the discharge line and
protects against excessive condenser coil pressure. It opens at
650 psig (31.1 kPa). High pressure may be caused by a dirty
condenser coil, failed fan motor, or condenser air recirculation.
To check switch:
1. Turn off all power to unit.
2. Disconnect leads on switch.
3. Apply ohmmeter leads across switch. You should have
continuity on a good switch.
COPELAND SCROLL COMPRESSOR (R--410A REFRIGER-
ANT)
The compressor used in this product is specifically designed to
operate with R--410A refrigerant and cannot be interchanged.
The compressor is an electrical (as well as mechanical) device.
Exercise extreme caution when working near compressors.
Power should be shut off, if possible, for most troubleshooting
techniques. Refrigerants present additional safety hazards.
EXPLOSION HAZARD
Failure to follow this warning could result in personal injury or
death and/or property damage.
Wear safety glasses and gloves when handling refrigerants.
Keep torches and other ignition sources away from
refrigerants and oils.
!
WARNING
The scroll compressor pumps refrigerant throughout the system
by the interaction of a stationary and an orbiting scroll. The scroll
compressor has no dynamic suction or discharge valves, and it is
more tolerant of stresses caused by debris, liquid slugging, and
flooded starts. The compressor is equipped with a noise reducing
shutdown device and an internal pressure relief port.
The
pressure relief port is a safety device, designed to protect against
extreme high pressure. The relief port has an operating range
between 550 (26.3 kPa) and 625 (29.9 kPa) psi differential
pressure.
REFRIGERANT
EXPLOSION, ENVIRONMENTAL SAFETY HAZARD
Failure to follow this warning could result in personal injury,
death or equipment damage.
This system uses R--410A refrigerant which has higher
operating pressures than R--22 and other refrigerants. No
other refrigerant may be used in this system. Gauge set,
hoses, and recovery system must be designed to handle
R--410A. If you are unsure, consult the equipment
manufacturer.
WARNING
!
This system uses R--410A refrigerant which has higher operating
pressures than R--22 and other refrigerants. No other refrigerant
may be used in this system. Gage set, hoses, and recovery
system must be designed to handle R--410A. If you are unsure,
consult the equipment manufacturer. Failure to use R--410A
compatible servicing equipment or replacement components may
result in property damage or injury.
COMPRESSOR OIL
The Copeland scroll compressor uses 3MAF POE oil. If additional
oil is needed, use Uniqema RL32--3MAF. If this oil is not available,
use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC. This oil is
extremely hygroscopic, meaning it absorbs water readily. POE oils
can absorb 15 times as much water as other oils designed for
HCFC and CFC refrigerants. Take all necessary precautions to
avoid exposure of the oil to the atmosphere.
SERVICING SYSTEMS ON ROOFS WITH SYNTHETIC
MATERIALS
POE (polyolester) compressor lubricants are known to cause long
term damage to some synthetic roofing materials. Exposure, even
if immediately cleaned up, may cause embrittlement (leading to