SB-110-4
55
▶ Evacuate compressor and oil filter chamber.
8.7
Oil change
!
!
NOTICE
Damage to the compressor caused by degraded
ester oil.
Moisture is chemically bound to the ester oil and
cannot be removed by evacuation.
Proceed with extreme care:
Any penetration of air into the system and oil
drum must be avoided under all circumstances.
Use only oil drums in their original unopened
state!
WARNING
Oil separator and oil cooler are under pressure!
Serious injuries are possible.
Depressurize oil separator and oil cooler!
Wear safety goggles!
The listed oils, see chapter application ranges, page
33, are characterised by their particularly high degree
of stability. An oil change is generally not required
when appropriate suction-side fine filters are mounted
or used.
• In case of compressor or motor damage, it is recom-
mended performing an acid test.
If necessary, arrange for cleaning:
• Mount a bidirectional acid-retaining suction line gas
filter and change oil.
• Purge the system on the highest point of the dis-
charge side and collect the refrigerant in a recycling
cylinder.
• If necessary, change filter and oil again after several
operating hours and purge the system.
Oil types see chapter Application ranges, page 33
Dispose of waste oil properly.
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 vent the refrigerant, but dispose
of it properly!
Loosen screwed joints or flanges on the compressor
valves. Remove the compressor from the system; use
hoisting equipment if necessary.
When using flammable refrigerants of safety group
A2L
DANGER
Fire hazard in the event of refrigerant leakage
and in the presence of an ignition source!
Avoid open fire and ignition sources in the ma-
chinery room and in the hazardous zone!
▶ Mind the ignition point in air of the refrigerant used,
see also EN378-1.
▶ Ventilate the machinery room according to EN378 or
install an extraction device.
▶ In case of leakage: Leaking refrigerant is heavier
than air and flows downwards. Avoid accumulation
and formation of ignitable blends with air. Do not in-
stall in ditches or near venting or drainage openings.
▶ The devices are not designed for operation in an Ex
zone. If it is not possible to avoid an ignitable atmo-
sphere by means of ventilation, the device has to be
shut down safely. The safety shut-down can be
triggered by a gas warning system that reacts at
20% of the LFL/LEL.
▶ Protect the pipelines against damage.
