Fig. 13 Frost protector
1 Control line (frost protection)
2 Frost protector
3 Shut-off ball valve
4 Control line (bypass line)
Operating the machine in cold temperatures
The frost protector is activated when the machine is started or stopped in ambient temperatures
below freezing. Due to the antifreeze in the air flow, valves and control lines in the interior are
moistened preventing a freezing of the control and regulating system.
During machine operation, the generated innate heat counteracts a potential freezing of individual
components.
Machine operation in summer
Antifreeze is not required for the regulating air at ambient temperatures of more than 32°F.
4.7.3 Option oa
Optional battery isolating switch
The «battery isolating switch» disconnects the battery completely from the machine's electrical sys‐
tem (fire protection, battery discharge protection).
Danger of short circuit!
Damage to the machine’s electrical components is possible.
➤ Use the «battery isolating switch» only when the machine is shut down.
➤ Do not use the «battery isolating switch» as a main or emergency switch.
4 Design and Function
4.7 Options
52
Operator Manual Screw Compressor
M100 No.: 9_6999 23 USE
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