To be checked See
chapter
Confirmed?
➤ Is there sufficient cooling oil in the airend? 7.5
➤ Is the machine firmly anchored to the floor?
(option H1)
6.7.1
➤ Are door interlock switches aligned and their function checked? 7.7
➤ Are all access doors closed and latched and all removable panels in
place and secured?
–
Tab. 46 Installation conditions checklist
7.4 Setting the overload protection cut-out
Electrical diagram 13.4 gives the location of the overload protection cut-out.
With star-delta starting, the phase current is fed via the overload protection cut-out. This phase cur‐
rent is 0.58-times the rated motor current.
To prevent the overload protection cut-out from being triggered by voltage fluctuations, tempera‐
ture influences or component tolerances, the setting can be higher than the arithmetical phase cur‐
rent.
➤ Check the overload protection cut-out setting.
The overload protection cut-out shuts the machine down despite being correctly set?
➤ Contact KAESER Service.
7.5 Pouring cooling oil into the airend
Before starting the compressor for the very first time and before re-starting after a shutdown period
of more than 3 months it is necessary to manually add a quantity of cooling oil into the airend. In
order to avoid that the cooling oil exceeds the permissible level, drain the required quantity from
the de-pressurised oil separator tank.
Chapter 10.15 provides detailed information on how to drain cooling oil from the oil separator tank.
Material 1l cooling oil
Precondition The supply disconnecting device is switched off,
the device is locked off,
the absence of voltage has been verified.
7 Initial Start-up
7.4 Setting the overload protection cut-out
9_5717 20 E
Service Manual Screw Compressor
ASK T SIGMA CONTROL BASIC
47
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