To be checked See
chapter
Confirmed?
➤ Are all access doors closed and latched and all removable panels in
place and secured?
–
Tab. 41 Installation and operating 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 current
is 0.58-times the rated motor current.
To prevent the overload protection cut-out from being triggered by voltage fluctuations, temperature
influences or component tolerances, the setting can be higher than the arithmetical phase current.
➤ 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 Setting the motor overload protection switch
Electrical diagram in chapter 13.4 gives the setting values for the motor overload protection switch.
In direct on-line starting, the current for the fan motor is fed via the motor overload protection switch.
To prevent the motor overload protection switch from being triggered by voltage fluctuations,
temperature influences or component tolerances, the setting can be higher than the rated motor
current.
➤ Check the motor overload protection switch setting.
The overload protection switch shuts the machine down despite being correctly set?
➤ Contact KAESER Service.
7.6 Filling 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 dep‐
ressurized oil separator tank.
Chapter 10.16 provides detailed information on how to drain cooling oil from the oil separator tank.
Material 1 quart Cooling oil from separator tank
Precondition The supply disconnecting device is switched off,
the device is locked off,
the absence of voltage has been verified.
The machine is fully vented, the pressure gauge on the oil separator tank reads 0 psig.
7 Initial Start-up
7.4 Setting the overload protection cut-out
44
Service Manual Screw Compressor
BSD 9_5708 08 USE
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