6.0 Operation
T-BA/ET-1250-0-GB-
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6.0 Operation
6.1 Restarting
The rotary compressor, respectively the compressor
vacuum pump is normally started as specified in
Chapter 5 “Commissioning”.
6.2 Regular inspections
During compression operation
Check working pressure on the pressure gauge (the
permissible pressure is listed on the rating plate of the
machine).
During vacuum operation
Check operating vacuum on the vacuum gauge (the
permissible vacuum is listed on the rating plate of the
machine).
Final compression temperature
Read off the final compression temperature
Depending on the operating condition,
the compression temperature can also
be well above the stated figures (up to
about 200 °C)!
Drain off condensate
Drain off condensate from the condensate and safety
tanks.
The system must not be pressurized
when draining off the condensate.
There is a risk of freezing during the win-
ter!
Speed
Check the operating speed.
Oil level
Read off the oil level from the inspection glass of the
storage tank.
Top up with lubricating oil when the oil level reaches
the red marking.
Lube oil specification (see „Recommended lubricant“
on page 22.)
6.2.1 Safety valve
In accordance with accident prevention regulations, a
safety valve without a cut-off must be fitted in the pres-
sure pipe downstream of every compressor. It must be
set so as to prevent the maximum permissible opera-
ting pressure being exceeded by more than 10 %.
The valve setting must be secured to pre-
vent unauthorized or incorrect alteration.
The safety valve must not be blocked or
manipulated in any other manner.
Blowing off the complete volumetric flow
via the safety valve with a closed pres-
sure pipe must be avoided, since this
may result in the occurrence of dange-
rous compressive oscillations.
The safety valve must not be used as a
pressure control device.
Usage as a control device can cause
damage to the valve!
The safety valve selected must be sufficient to permit
the complete volumetric flow rate to be blown off via
the valve when suitably pressurized.
Check function during commissioning and subse-
quently every week by actuating the manual vent
when the machine is operating.
6.2.2 Vent valve
The vent valve is the controller for a vacuum system.
It opens when the set vacuum is achieved and permits
the vacuum pump to take in additional atmospheric
air.
Ensure function every week by testing whilst observ-
ing the vacuum gauge on the intake socket of the
compressor vacuum pump.
Do not exceed the permissible vacuum of
200 mbar.
