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from system manufacturing processes which leave
solid or liquid contaminants in the evaporator coil,
condenser coil, and interconnecting tubing plus any
contaminants introduced during the field installation
process. Molecular sieve and activated alumina are
two filter-drier materials designed to remove moisture
and mitigate acid formation. A 100% molecular sieve
filter can be used for maximum moisture capacity. A
more conservative mix, such as 75% molecular sieve
and 25% activated alumina, should be used for service
applications.
Oil Type & Removal
Mineral oil is used in the ZR*KC compressors for
R-22 applications. Polyolester (POE) oil is used in the
ZR*KCE and ZP*KCE compressors for R-22/R-407C/R-
134a and R-410A applications respectively. See the
compressor nameplate for the original oil charge. A
complete recharge should be approximately four fluid
ounces (118 ml) less than the nameplate value.
If additional oil is needed in the field for POE
applications, Copeland
Emkarate RL32-3MAF, Parker Emkarate RL32-3MAF/
(Virginia) LE32-3MAF, or Nu Calgon 4314-66 (Emkarate
RL32-3MAF) should be used. Copeland
Hatcol EAL 22CC, and Mobil EAL Arctic 22 CC are
acceptable alternatives.
If additional oil is needed in the field for mineral oil
applications, Sonneborn Suniso 3GS or Chevron
Texaco Capella WF32 should be used.
When a compressor is exchanged in the field it is
possible that a major portion of the oil from the replaced
compressor may still be in the system. While this may
not affect the reliability of the replacement compressor,
the extra oil will add to rotor drag and increase power
usage. To remove this excess oil an access valve
port has been added to the lower shell of the service
compressor. After running the replacement compressor
for a minimum of 10 minutes, shut down the compressor
and drain excess oil from the Schrader valve until the oil
level is at one-half of the sight-glass level. This should
be repeated twice to make sure the proper oil level has
been achieved.
CAUTION POE must be handled carefully and
the proper protective equipment (gloves, eye
© 2016 Emerson Climate Technologies, Inc.
Ultra 32-3MAF, Lubrizol
™
Ultra 22 CC,
™
protection, etc.) must be used when handling POE
lubricant. POE must not come into contact with any
surface or material that might be harmed by POE,
including without limitation, certain polymers (e.g.
PVC/CPVC and polycarbonate).
Three Phase Scroll Compressor Electrical Phasing
NOTICE
Compressors that employ CoreSense technology
have phase protection and will be locked out after
one reverse phase event.
Copeland Scroll compressors, like several other types
of compressors, will only compress in one rotational
direction. Three phase compressors will rotate in either
direction depending upon phasing of the power. Since
there is a 50% chance of connecting power in such a
way as to cause rotation in the reverse direction, it is
important to include notices and instructions in
appropriate locations on the equipment to ensure
that proper rotation direction is achieved when
the system is installed and operated. Verification
of proper rotation direction is made by observing that
suction pressure drops and discharge pressure rises
when the compressor is energized. Reverse rotation will
result in no pressure differential as compared to normal
values. A compressor running in reverse will sometimes
make an abnormal sound.
There is no negative impact on durability caused by
operating three phase Copeland Scroll
the reversed direction for a short period of time (under
one hour). After several minutes of reverse operation,
the compressor's internal overload protector will trip
shutting off the compressor. If allowed to repeatedly
restart and run in reverse without correcting the
situation, the compressor bearings will be permanently
damaged because of oil loss to the system. All three-
phase scroll compressors are wired identically internally.
As a result, once the correct phasing is determined for
a specific system or installation, connecting properly
phased power leads to the identified compressor
electrical (Fusite
) terminals will maintain the proper
™
rotational direction (see Figure 3). It should be noted
that all three-phase scrolls will continue to run in reverse
until the internal overload protector opens or the phasing
is corrected.
9
AE4-1303 R15
compressors in
™
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