RLC-SVX19J_SHORT-GB
41
Periodic Maintenance
Figure 18 GP2 Compressor
Figure 19: GP4 Compressor
Remaining Oil Charge
1.
Add 0.95 litres (0.9kg) 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 6mm (¼”) fl are fi tting with
a schraeder valve that is on the side of the oil fi lter
housing. This is the port that must be used to add oil
into the compressor so that the fi lter and lines are full
at the fi rst 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 fi lter 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:
• 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 fi tting 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 fi tting and the other end to an oil
pump. Use the pump to the draw oil out of the
oil container and push the required amount of oil
into the unit
Note:
the compressor fi lter 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 fl ooding the compressor with oil.
CAUTION!
Use only Trane Oil 00048E in RTAF SE HE
and XE chillers and Trane OIL 00317 for HSE version in
the RTAF units to avoid any catastrophic damage to the
compressor or unit. Deduct from fi nal charge, all charge
added for prelubrifi cation 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, and the unit has been run for
more 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 event 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.
If oil was removed to service a compressor or change
the fi lter
follow this procedure:
1.
If the compressor is a new compressor or has
been removed from the system and reworked, add
0.95 litre (0.90kg) of oil to the motor cavity prior to
installing the compressor into the chiller.
2. Install the compressor in the system. Make sure that
the fi lter shutoff valve is closed. Other compressor
isolation valves may also be closed depending
upon the service that was completed. For example,
changing the oil fi lter would require the compressor
