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Commissioning
8.7
Avoiding slugging
To prevent slugging:
The complete refrigeration system must be properly designed.
All components must be compatibly rated with each other with regard to output
(particularly the evaporator and expansion valves).
Suction gas superheat at the compressor input
should be min. 7 - 10 K.
(check the setting
of the expansion valve). For HC and LG compressors see chapter 5.3.
The system must reach a state of equilibrium.
Particularly in critical systems (e.g. several evaporator points), measures are recommended such
as replacement of liquid traps, solenoid valve in the liquid line, etc.
There should be no movement of coolant whatsoever while the compressor is at a standstill.
ATTENTION
Slugging can damage the compressor and cause refrigerant to
leak.
9.1 Preparation
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Maintenance
9.2 Work to be carried out
In order to guarantee optimum operational reliability and service life of the compressor,
we
recommend
carrying out servicing and inspection work at regular intervals:
Oil change:
-
not mandatory for factory-produced series systems.
-
for field installations or when operating near the application limit: for the first time after 100
to 200 operating hours, then approx. every 3 years or 10,000 - 12,000 operating hours.
Dispose of used oil according to the regulations; observe national regulations.
Annual checks:
Oil level, leak tightness, running noises, pressures, temperatures, function of
auxiliary devices such as oil sump heater, pressure switch.
WARNING
Before starting any work on the compressor:
Switch off the compressor and secure it to prevent a restart.
Relieve compressor of system pressure.
Prevent air from infiltrating the system!
After maintenance has been performed:
Connect safety switch.
Evacuate compressor.
Release switch lock.
Available spare parts and accessories can be found on our compressor selection tool under
vap.bock.de.
Only use genuine Bock spare parts!
9.3 Spare parts recommendation/accessories
Summary of Contents for HG66e Series
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