Field Oil Charging Procedure - Trane R Series Installation Operation & Maintenance

RLC-SVX02G-E4
Maintenance Procedures
Remaining oil charge
1. Add 0.95 liter (0.90 kg) of oil to
the motor cavity or suction line
prior to installing the compressor
into the chiller.
2. If the unit is not equipped with
suction-line isolation valves, it
should contain no charge. If it has
isolation valves, then the charge
may be trapped in the evaporator.
In either case, the high side of the
system should not be
pressurized.
3. The oil-line shutoff valve must be
open to allow the oil to pass into
the oil lines and the oil separator.
4. The oil charging port is a ¼"
[6 mm] flare fitting with a
schrader valve that is on the side
of the oil-filter housing. This is
the port that must be used to add
oil into the compressor so that
the filter and lines are full at the
first start of the compressor.
5. On single-compressor circuits, all
the oil should be put into the
circuit through the oil-charging
port on the compressor filter
housing. On two-compressor
circuits, put approximately ½ of
the oil into the unit through each
of the two oil-charging ports on
the two compressors.
6. Oil may be put into the unit using
either of two methods:
CAUTION
Use only Trane Oil 0048E in the
RTAC units to avoid any
catastrophic damage to the
compressor or unit.
• Have the unit in vacuum. Note that
the vacuum connection should be
made on the unit at the service
valve that is on the discharge line.
Hook up one end of the oil-
charging hose to the oil-charging
fitting and immerse the other end
into the oil container. Let the
vacuum draw the required amount
of oil into the unit.
• Have the unit at the same pressure
as the oil. Hook up one end of the
oil-charging hose to the oil
charging fitting and the other end
to an oil pump. Use the pump to
draw oil out of the oil container
and push the required amount of
oil into the unit.
Note: the compressor filter has an
internal shutoff valve that will
prevent oil from entering the
compressor while the compressor is
not running. Therefore, there is no
concern about flooding the
compressor with oil.
CAUTION
Deduct from final charge, all charge
added for prelubrification to avoid
over-charging.
Field Oil-Charging
Procedure
Use the initial charging procedure
under the following circumstances:
• When virtually all of the oil has
been removed.
• If the oil charge is removed from
the compressor and oil system
only, but the unit has been run for
less than 15 minutes.
• If the oil charge is removed from
the compressor and oil system
only, and the unit has been run for
more than 15 minutes. However,
reduce the amount of oil added to
the unit by the normal quantity of
oil in the refrigeration system.
Note: this procedure can be
followed even with the refrigerant
charge isolated in the evaporating
section of the unit.
If small quantities of oil were
removed to service refrigeration
components, such as the
evaporator, replace the oil that was
removed back into the serviced
component prior to vacuum and
recharge of the refrigerant.
71