Direction Of Rotation Check; Motor Overload Relay Adjustment; Setting The Air System Pressure - KAESER SM 8 Service Manual

7.4

Direction of Rotation Check

Attention!
A check of the direction of rotation can be made by testing the phase sequence.
Arrows showing the direction of rotation are located on the motor and on the airend hous-
ing.
 On your initial start, "bump" the unit and verify the direction of rotation.
If the direction of rotation is incorrect, change over the supply conductors L1 and L2.
Attention!
7.5

Motor Overload Relay Adjustment

The relay is set to the standard adjustment at the factory.
For the rated motor current see motor nameplate.
Compressor motor: Direct on-- line start
Adjustment:
To prevent the motor overload relay from tripping (because of voltage fluctuations, tem-
perature influences or component tolerances), the value can be set up to 15% higher than
the rated motor current.
1 Motor overload adjustment
2 Reset button
7.6

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 (menu:
Configuration Pressure Settings Air Main Pressure (AMP). For further details, consult the
SIGMA CONTROL service manual.
Initial Start
The compressor is wired for connection to a clockwise phase se-
quence power supply.
If the airend rotates in the wrong direction, the compressor is auto-
matically shut down by the safety air pressure switch (4.2, see
chapter 5.3).
Lock the main disconnect in the "off" position in accordance with ap-
plicable lock out/tag out procedures (example: OSHA CFR 29
§ 1910.147) to ensure the compressor does not restart. See chap-
ter 2.3 for the main disconnect switch.
1
2
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