RT-SVX24Q-EN
197
Refrigeration System
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Refrigerant Evacuation and Charging
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The recommended method for evacuation and
dehydration is to evacuate both the high side and the
low side to 500 microns or less. To establish that the
unit is leak-free, use a standing vacuum test. The
maximum allowable rise over a 15 minute period is 200
microns. If the rise exceeds this, there is either still
moisture in the system or a leak is present.
IImmppoorrttaanntt:: Do Not release refrigerant to the
atmosphere! If adding or removing
refrigerant is required, the service
technician must comply with all federal,
state, and local laws.
• To prevent cross contamination of
refrigerants and oils, use only dedicated
R-410A service equipment.
• Disconnect unit power before
evacuation and do not apply voltage to
compressor while under vacuum.
Failure to follow these instructions will
result in compressor failure.
• Due to the presence of POE oil,
minimize system open time. Do not
exceed 1 hour.
• When recharging R-410A refrigerant, it
should be charged in the liquid state.
• The compressor should be off when the
initial refrigerant recharge is performed.
• Charging to the liquid line is required
prior to starting the compressor to
minimize the potential damage to the
compressor due to refrigerant in the
compressor oil sump at startup.
• If suction line charging is needed to
complete the charging process, only do
so with the compressor operating. Do
not charge liquid refrigerant into the
suction line with the compressor off!
This increases both the probability that
the compressor will start with
refrigerant in the compressor oil sump
and the potential for compressor
damage.
• Allow the crankcase heater to operate a
minimum of 8 hours before starting the
unit.
Charge Storage
Due to the reduced capacity of the microchannel
condenser coil compared to the round tube plate fin
evaporator coil, pumping refrigerant into the
condenser coil to service the refrigerant system is no
longer an option.
Compressor Oil
Refer to Table 75, p. 199 for the appropriate scroll
compressor oil charge. Remove and measure oil from
any compressor replaced. Adjust oil in replacement
compressor to prevent excessive oil in system.
Anytime a compressor is replaced, the oil for each
compressor within the manifold must be replaced.
The scroll compressor uses Trane OIL00079 (one quart
container) or OIL00080 (one gallon container) without
substitution. Discoloration of the oil indicates that an
abnormal condition has occurred. If the oil is dark and
SSeerrvviiccee aanndd MMaaiinntteennaannccee
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