Initial Start
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7.6 Motor Overload Protection Switch Adjustment
Before any adjustments are carried out to the compressor package,
lock the main disconnect in the ”off” position in accordance with appli-
cable lock out/tag out procedures (example: OSHA CFR 29 § 1910.147)
to ensure the compressor does not restart.
See chapter 2.3 for the main disconnect switch.
The standard setting is made at the factory.
Fan Motor: direct on--line start
In direct on---line start the starting current is fed via the motor overload protection switch.
For the nominal motor current see motor nameplate.
Adjustment:
This can be set to a maximum of 10% higher than the rated motor current to prevent trig-
gering of the motor overload protection switch under conditions of voltage fluctuation.
321
1 Fan motor overload protection relay
2 Fan motor overload adjustment
3 Reset button
7.7 Setting the Air System Pressure
The air system pressure is preset at the factory. It can be changed in SIGMA CONTROL to
match customer’s operational requirements if the password is known. For further details,
consult the SIGMA CONTROL service manual.
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