Operating and Maintenance Manual 09/2019 – part I
Screw compressors
44
10. Appendices
10.1. Compressor with the heating system–guidelines concerning operation
This appendix is the addition to the Operating and Maintenance Manual of the BERG series
screw compressor and the requirements, specified in it, are only completion to the
requirements given in the Operating and Maintenance Manual.
1. The BERG series screw compressor has been equipped with the 0.5 kW electric tubular
heater with radiator.
2. Supply voltage to the heater is supplied directly from the compressor electrical system. It
is not required to run the separate power supply to the heater.
3. The compressor is equipped with two thermostats. The first one, installed directly on the
heater, is used to control the heater temperature. Any changes of the thermostat settings
are not allowed. The second one, installed in the compressor housing, is used to maintain
the suitable temperature of the components. The thermostat was factory set to ensure that
the compressor is ready for operation at ambient temperatures below zero. If it is
necessary, you can change the thermostat setting to the higher one. However, you must
remember to set the thermostat knob to the factory position when unfavourable
temperature conditions cease to exist.
4. For correct operation of the heating system, you must provide continuous power supply.
When the compressor has not been operated for some time (power supply disconnected),
power supply must be reconnected for at least two hours before the compressor planned
restart.
5. Check periodically the heater condition every 3 months. Any deposits should be cleaned
with compressed air or soft brush. Check the connection condition of the power cables.
The above operations should be performed when the heater is switched off and cooled
down.
6. Under no circumstances should the heater be touched because you can get burnt.
Fig. 23 Screw block and motor with the electric heater.
Electric heater
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