Trane CVGF-SVU02B-E4 Operation And Maintenance Manual page 81

CAUTION
OIL CONTAMINATION
Due to the hygroscopic properties
of POE oil, all oil must be stored in
metal containers. The oil will
absorb water if stored in a plastic
container.
Oil Charging
CVGF units ship factory charged
with 15 gallons (56.8 l) of oil and
a 5 psig (34 kPa) @ 70 °F (20°C)
dry nitrogen holding charge.
Note: The correct oil charge for
all CVGF units is 15 gallons (56.8
l) of Trane OIL00037 (Trane
OIL00037 is R134a miscible oil in
1-gallon (3.785 l) containers). A 5
gallon (18.9 l) container of Trane
approved R134a oil is available
(Trane OIL00049). As with
mineral oil, if water is in the
system it will react with the oil to
form acids. Use the following
table to determine the
acceptability of the oil.
POE Oil
Acceptable
Properties
Levels
Moisture content less than
300 ppm
Acid Level less than
0.5 TAN (mg
KOH/g)
CVGF-SVU02B-E4
Periodic
Maintenance
Trane recommends subscribing
to an oil analysis program to
determine the condition of the
oil rather than changing the oil
on a periodic basis. This
program will reduce the chiller's
lifetime oil consumption and
minimize refrigerant emissions.
The oil analysis should be
performed by a qualified
laboratory, experienced in
refrigerant and oil chemistry,
and the servicing of Trane
centrifugal chillers.
Oil Charging Procedure
Use appropriate oil as specified:
USA Europe
Oil 0037 Oil 021E
Oil 0049 Oil 0020E
Unit Charged With Refrigerant
1. Decant the oil from the
shipping container into the
cylinder of an oil recovery and
recharge unit per the unit
operation instructions (15
gallons (56.8 l) required).
2. A vacuum of at least 500
microns must be attained and
an oil temperature of at least
122°F (50°C) maintained to
remove existing moisture. A
standing vacuum rise test
should be performed after the
distillation process is
complete to insure the oil has
completely outgassed any
moisture or non-condensibles.
A vacuum rise of less than 100
microns (0.1 mm Hg) in a 2
hour period indicates the oil is
ready for transfer.
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