Thermo King SPECTRUM TS 30 SR NAD, Manual

Page: 145 / 196

Refrigeration Service Operations
145
Compressor Oil
As of January 1, 1993, Thermo King Corporation
has chosen to use a compressor oil called Polyol
Ester (POE)—also called ester based oil. POE oil
is compatible with R-404A and can be used in low
temperature applications. This oil is available
from service parts (P/N 203-516). Required for
Scroll compressors.
Compressors Shipped with POE Oil
Thermo King Scroll compressors are charged with
Polyol Ester oil (POE). All gauge fittings are
1/4 inch fittings.
Because Polyol Ester has an affinity for moisture,
it must be kept in capped containers. In addition,
it should be added as the last step in system repair.
Rubber gloves are recommended when handling
Polyol Ester because it may cause skin irritation.
Equipment Recommendations For
Use With R-404A
Dedicated Equipment
Vacuum Pumps
When evacuating, a two stage three or five CFM
pump is recommended. It is also recommended
that dry nitrogen be used first. Ideally, a new
vacuum pump should be used and dedicated for
use with R-404A systems because residual
refrigerants may remain in used vacuum pumps.
Pumps used with other Thermo King refrigerants
may be used but extreme care should be taken to
prevent contamination of R-404A systems with
other refrigerants.
The Thermo King Evacuation Station is
recommended. This station is available from
service parts (see Tool Catalog). See Truck and
Trailer Service Bulletin T&T 061 for additional
details.
Use only recommended vacuum pump oils and
change oil after every major evacuation. Vacuum
pump oils are highly refined and the use of
contaminated oils will prevent the desired vacuum
from being obtained. Failure to follow these
recommendations may result in conditions that
will destroy the vacuum pump.
Gauge Manifold Sets
Gauge manifold sets that show the correct
pressure-temperature relationship should be used.
Gauge manifolds and manifold hoses used with
other Thermo King refrigerants maybe used but
extreme care should be taken to prevent
contamination of the R-404A systems with other
refrigerants. Purge manifold and hoses with dry
nitrogen before using. Never use equipment that
may be contaminated with automotive type
Polyalkylene Glycol (PAG) oils.
CAUTION: POLYOL ESTER (POE) IS
THE ONLY OIL FOR USE WITH
THERMO KING UNITS USING R-404A.
IT SHOULD NOT BE ADDED TO
STANDARD THERMO KING UNITS,
NOR SHOULD THE STANDARD OR
SYNTHETIC OIL BE ADDED TO
SYSTEMS CONTAINING R-404A.
COMBINING THE TWO OILS COULD
RESULT IN DAMAGE TO THE
SYSTEM.
CAUTION: Equipment that has been used
with other refrigerants MUST NOT be
used with R-404A refrigerants. Mixing
R-404A with other refrigerants will cause
contamination of the refrigerant. Using
contaminated refrigerant will cause
system failure.