22
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 compressor is in a PuronR refrige rant 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.
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--c ertified refrigerants could contain contaminates
that could lead to unsafe operating conditions. Use
ONLY refrigerants that conform to AHRI Standard
700.
Replacing Compressor
NOTE: Only fac tory--trained service technicia ns 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 polyol ester
(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 lines 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 c ompress refrigerant if
rotating in the right direction. Reverse rotation 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: Whe n the compre ssor is rotating in the wrong
direction, the unit makes an elevated level of noise and
does not provide cool ing.
On 3 --phase units with scroll compressors, it is important
to be ce rtain compressor is rotati ng 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 ri se, 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.
6. Reverse any two of the three unit power leads.
7. Reapply electrical power to t he compressor.
8. The suction pressure should drop and the discharge
pressure should rise which is normal for scroll
compressors on start--up.
9. Replace c ompressor if suct ion/discharge pressures are
not within specifica tions for the specific compressor.
The suction and discharge pressure levels should now
move to their normal start--up levels.
48HC
To Next Page
Loading...
