Integrated Pressure Relief Valve; Integrated Check Valve; Decommissioning; Standstill - Bitzer CSH6553-35Y Instructions De Service

case of compressor or motor damage, it is recommen-
ded performing an acid test. If necessary, carry out
cleaning measures: Mount a bidirectional acid retaining
suction line gas filter and change oil. Purge the system
on the highest point of the discharge side and collect
the refrigerant in a recycling cylinder If necessary,
change filter and oil again after several operating hours
and purge the system.
Changing the oil
Drain the oil from the oil separator and from the motor
chamber of the compressor. Oil draining positions on
the compressor, see chapter Connections and dimen-
sional drawings, page 35, connection positions 5 and 6.
Dispose of waste oil properly.

8.2 Integrated pressure relief valve

The valve is maintenance-free.
However, after repeated venting, it may leak perman-
ently because of abnormal operating conditions. The
consequences are reduced performance and a higher
discharge gas temperature.

8.3 Integrated check valve

After being shut off, the compressor runs reverse for a
short time (until pressure compensation in the oil separ-
ator takes place). When the check valve is damaged or
clogged, this time extends. The valve must then be
changed.
WARNING
The compressor is under pressure!
Serious injuries are possible.
Depressurize the compressor!
Wear safety goggles!
Mounting position: flange at the discharge gas outlet of
the oil separator. First remove discharge shut-off valve.
Detailed explanations, see maintenance instructions
SW-170.
50

9 Decommissioning

9.1 Standstill

Leave the oil heater switched on until disassembly.
This prevents increased refrigerant concentration in the
oil.
WARNING
Risk of refrigerant evaporation from the oil.
Increased risk of flammability, depending on the
refrigerant!
Shut-down compressors or used oil may still
contain rather high amounts of dissolved refri-
gerant.
Close the shut-off valves on the compressor
and extract the refrigerant!

9.2 Dismantling the compressor

WARNING
The compressor is under pressure!
Serious injuries are possible.
Depressurize the compressor!
Wear safety goggles!
Close the shut-off valves on the compressor. Extract
the refrigerant. Do not deflate the refrigerant, but dis-
pose of it properly!
Loosen screwed joints or flanges on the compressor
valves. Remove the compressor from the system; use
hoisting equipment if necessary.

9.3 Disposing of the compressor

Drain the oil from the compressor. Dispose of waste oil
properly! Have the compressor repaired or dispose of it
properly!
When returning compressors that have been operated
with flammable refrigerant, mark the compressor with
the symbol "Caution flammable gas", as the oil may still
contain refrigerant.
SB-170-7