Operator's Manual High Pressure Breathing Air Compressors

Operator’s Manual
3.6.2. Starting the unit
NOTE
Knocking, audible when starting, is due to last stage floating piston. This knocking disappears as soon as there
is pressure between the stages and the piston is running synchronous with the other pistons. Therefore, this
knocking can be ignored.
Units with electric drive motor:
-- Alternating current: Position 0--1 control switch on engine to 1.
-- Three--phase current: Master switch must be ON (to be supplied by customer).
-- Depending on model, either set 0 --I switch at switch box to I, or press the I button on the control and monitoring unit.
-- (Units with electronic monitoring unit):
Start--up of the compressor is indicated by the pilot light illuminating on the Electronic Control which must extinguish once the
specified operating conditions have been attained.
-- Observe the pressure switch shut--off pressure on units with automatic compressor control.
-- If final pressure is reached and pressure switch shuts off unit properly, open condensate drain valves and drain condensate. Unit
is then ready for filling operation.
Units with petrol or diesel engine
-- Open condensate drain valves on the filters so that motor starts without load.
-- Set choke on petrol engine to position START. Start engine with recoil starter or crank handle. As soon as motor runs smoothly
return choke to normal operating position.
-- Close condensate drain valves and run unit to final pressure. Check final pressure safety valve and pressure gauge.
-- As soon as final pressure is reached and final pressure safety valve blows off, open condensate drain valves and drain condensate
-- unit is ready for filling operation.
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