Carrier 50HC Series User Manual

21
COMPRESSOR
Lubrication
The compressor is charged with the correct amount of oil
at the factory.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage to
compone nts.
The com pressor is in a PuronR refrigerant system and
uses a polyolester (POE) oil. This oil is extrem ely
hygroscopic, meani ng 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.
CAUTION
!
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 personal
injury and/or property
damage.
Never use non--certified refrigerants in this product.
Non--certified refrigerants c ould contain contaminates
that could lead to unsafe operating conditions. Use
ONLY refrigerants that conform to AHRI Standard
700.
Replacing Compressor
NOTE: Only factory--trained service technicians should
remove and replace compressor units.
INSTALLATION SITE DAMAGE
Failure to follow this caution can result in damage to
equipment location site.
Puron (R--410A) refrigerant contains polyolester
(POE) oil that can damage the roof membrane.
Caution should be taken to prevent POE oil from
spilling onto the roof surface.
The factory also recommends that the suction and
discharge line s be cut with a tubing cutter instead of
using a torch to remove brazed fittings.
CAUTION
Compressor Rotation
EQUIPMENT DAMAGE
Failure to follow this caution can result in equipment
dama ge.
Scroll compressors can only compre ss refrigerant if
rotating in the right direction. Reverse rotati on for
extended times can result in internal damage to the
compressor. Scroll compressors are sealed units and
cannot be repaired on site location.
CAUTION
NOTE: When t he compressor is rotating in the wrong
direction, the unit makes an elevated level of noise and
does not provide cooling.
On 3 --phase units with scroll compressors, it is important
to be ce rtain compressor is rotating in the proper
direction. To de termine whether or not compressor is
rotating in the proper dire ction:
1. Connect service gauges to suction a nd 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 direct ion.
5. Turn off power to the unit.
6. Reverse any two of the three unit power leads.
7. Reapply electrical power to the compressor.
8. The suction pressure should drop and the discharge
pressure should rise which is normal for scroll
compressors on start--up.
9. Replace compressor i f suct ion/discharge pressures are
not within specifications for the specific compressor.
The suction and discharge pressure leve ls should now
move to their normal start--up levels.
50HC

Carrier 50HC Series Specifications

General

Brand	Carrier
Model	50HC Series
Category	Air Conditioner
Language	English