Compressors - Carrier 48HC D17 Series Service And Maintenance Instructions

COMPRESSORS

Lubrication
Compressors are charged with the correct amount of oil at
the factory.
WARNING
!
FIRE, EXPLOSION HAZARD
Failure to follow this
warning could result in
death, serious personal
injury and/or property
damage.
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.
Using gauge set, certified for use with Puron (R410)
refrigerant, to relieve pressure 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
Failure to follow this
warning could result in
death, serious personal
injury and/or property
damage.
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
!
FIRE, EXPLOSION HAZARD
Failure to follow this warning
could result in death, serious per-
sonal injury and/or property
damage.
Never use non- - certified refrigerants in this product.
Non- - certified refrigerants could contain contaminates
that could lead to unsafe operating conditions. Use
ONLY refrigerants that conform to AHRI Standard
700.
Replacing the Compressor
The compressor using Puron 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.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution can result in damage to
components.
The compressor is in a Puron 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/lbs (7.3 - - 8.5 Nm).
Compressor Rotation
On 3-phase units with scroll compressors, it is important
to be certain compressor is rotating in the proper
direction. To determine whether or not compressor is
rotating in the proper direction:
1. Connect service gauges to suction and discharge
pressure 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/
Tag- - out procedures.
6. Reverse any two of the unit power leads.
7. Reapply power to the compressor.
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