Compressors - Carrier 50TC*17 Series Service And Maintenance Instructions

COMPRESSORS

Lubrication
The compressor is charged with the correct amount of oil
at the factory.
WARNING
!
FIRE, EXPLOSION HAZARD
Never use air or gases containing oxygen for leak
testing or for operating refrigerant compressors.
Pressurized mixtures of air or gases containing
oxygen can lead to an explosion.
WARNING
!
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this WARNING can result in
personal injury or death.
Use a gauge set certified for use with PuronR
(R−410A) refrigerant to relieve presure and recover
all refrigerant before system repair or final unit
disposal.
Wear safety glasses and gloves when handling
refrigerants.
Keep torches and other ignition sources away from
refrigerants and oils.
WARNING
!
FIRE, EXPLOSION HAZARD
Never use non−certified refrigerants in this product.
Non−certified refrigerant could contain contaminant
that could lead to unsafe operating conditions. Use
ONLY refrigerants that conform to AHRI Standard
700.
Replacing the Compressor
The compressor using PuronR refrigerant contains a POE
oil. This oil has a high affinity for moisture. Do not
remove the compressor's tube plugs until ready to insert
the unit suction and discharge tube line ends.
Failure to follow this
warning could result in
death, personal personal
injury and/or property
damage.
Failure to follow this
warning could result in
death, personal personal
injury and/or property
damage.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage to
components.
The compressor is in a PuronR refrigerant system and
uses a polyolester (POE) oil. 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. Avoid
exposure of the oil to the atmosphere.
NOTE: Only factory−trained service technicians should
remove and replace compressor units.
Compressor Mounting Bolts: Compressor mounting
bolts should be periodically inspected for proper tightness.
Bolts should be tightened and have the torque set at 65−75
in−lb (7.3 − 8.5 Nm).
Compressor Rotation
On 3−phase units with scroll compressors, it is important
to be certain the compressor is rotating in the proper
direction. To determine whether or not the compressor is
rotating in the proper direction:
1. Connect service gauges to suction and discharge pres-
sure fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start−up.
NOTE: If the suction pressure does not drop and the
discharge pressure does not rise to normal levels:
4. Note that the evaporator fan is probably also rotating
in the wrong direction.
5. Turn off power to the unit. Use applicable lockout/
tagout procedures.
6. Reverse any two of the unit power leads.
7. Reapply power to the compressor.
The suction and discharge pressure levels should now
move to their normal start−up levels.
NOTE: When the compressor is rotating in the wrong
direction, the unit makes an elevated level of noise and
does not provide cooling.
Filter Drier
Replace the Filter Drier whenever the refrigerant system
is exposed to atmosphere. Only use factory specified
liquid−line filter driers with working pressures no less
than 650 psig (4482 kPa). Do not install a suction−line
filter drier in liquid line. A liquid−line filter drier designed
for use with PuronR refrigerant is required on every unit.
24