Replace Oil Filter (Csw105); Integrated Pressure Relief Valve; Integrated Check Valve; Decommissioning - Bitzer CSH6553-35Y Operating Instructions Manual

Changing the oil
WARNING
The compressor is under pressure!
Serious injuries are possible.
Depressurize the compressor!
Wear safety goggles!
▶ Drain the oil from the compressor and motor hous-
ing. Oil draining positions on the compressor are the
connection positions 5 and 6, see chapter Connec-
tions and dimensional drawings, page 59.
▶ Fill in new oil.
▶ Dispose of waste oil properly.

8.2 Replace oil filter (CSW105)

Prepare a new oil filter.
▶ Place a flat pan under the oil valve for maintenance
(5) and the oil filter flange (18).
▶ Drain oil and dispose of it properly.
▶ Open the flange of the oil filter and remove it by
pulling it forward.
➙ The integrated oil filter is mounted on the rear side of
the flange.
▶ Unscrew the oil filter from the flange.
▶ Mount a new oil filter on the flange.
▶ Replace the O-ring at the flange.
▶ Insert the flange with the new oil filter, the new flat
gasket and the new O-ring.
NOTICE
!
!
Risk of damage to the compressor.
Tighten screws and nuts only to the prescribed
tightening torque and, if possible, crosswise in
at least 2 steps.
▶ Charge with new oil.
▶ Test tightness before commissioning.

8.3 Integrated pressure relief valve

The valve is maintenance-free. Its response pressure
difference is 28 bar.
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.
76

8.4 Integrated check valve

After being shut off, the compressor runs reverse for a
short time (approx. 5 s, until pressure equalisation in
the oil separator 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: in discharge gas outlet flange below
the discharge shut-off valve or pipe connection. Re-
placement see maintenance instructions SW-170.

9 Decommissioning

9.1 Standstill

Leave the oil heater switched on until disassembly.
This prevents increased refrigerant concentration in the
oil.
WARNING
Fire risk by evaporating refrigerant.
Close the shut-off valves on the compressor
and extract the refrigerant. Keep oil containers
closed.
Shut-down compressors or used oil may still contain
rather high amounts of dissolved refrigerant. Depend-
ing on the refrigerant, this lead to an increased risk of
flammability.

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.
SB-170-10