Note: Ensure that the compressor is
not pressurized.
3 Open the flare fitting on the oil-line
shut off valve.
4 Open the flare fitting on the filter
housing. This is the port that must
be used to put oil into the
compressor.
5 Install charging hose on oil
charging port (with the Schrader
valve) and the other on the oil
canister.
6 Lift the oil canister, or use a pump,
to pour oil into the filter housing.
7 When oil comes out of the flare
fitting on the oil line shut off valve
the filter is full. Stop adding oil.
8 Put the cap on the flare on the oil
line shut off valve, remove the
charging hose and put the cap
back on the flare on the filter
housing.
9 Vacuum the compressor (low side)
and prepare it for inclusion in the
system. There is a service valve on
the suction line. Use these valves
to vacuum the compressor.
10 Open the oil line shut off valve.
Severe damage to the
compressor can result if the oil
line shut off valve is closed when
the compressor is started.
WARNING! Catastrophic damage to
the compressor will occur if the oil
line shut off valve or the isolation
valves are left closed on unit start-
up.
11 Open the other compressor
isolation valves.
Note: this procedure assumes that
the oil that is put into the filter
housing does not have contaminants
such as non-condensable gases. The
oil forces these gases out of the filter
and oil line shut off valve without
the need to pull a vacuum on this
small volume. If the oil has been in
an open container or is otherwise
contaminated, then this small
volume must be subject to vacuum
as well. However, the filter cavity is
full of oil. Therefore, be sure to use a
flash tank in line with the vacuum
pump to make sure that oil, that is
pulled out of the filter cavity, does
not slug the vacuum pump.
Field Oil-Charging
Procedure
Use the initial charging procedure
when virtually all of the oil has been
removed.
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, simply replace the oil
that was removed into the serviced
component prior to vacuum and
recharge of the refrigerant.
If oil was removed to service a
compressor or change the filter
follow this procedure:
1 If the compressor is a new
compressor or has been removed
from the system and reworked,
add 1 liter oil to the motor cavity
prior to installing the compressor
into the chiller.
2 Install the compressor in the
system. Make sure that the filter
shut off valve is closed.
Other compressor isolation valves
may also be closed depending upon
the service that was completed. For
example, changing the oil filter
would require the compressor to be
isolated and pulled into vacuum.
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RTAD-SVX01F-E4
Maintenance Procedures