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4.6.3.1 Option bb
Coolant pre-heating
The engine coolant can be pre-heated to improve starting under cold conditions.
The power supply to the coolant pre-heater takes place via a separate network connector. A flexi‐
ble power cable (supplied) connects the machine's power plug to the user's power socket.
The coolant pre-heater works according to the principle of self-circulation.
Fig. 10 Coolant pre-heating
1
Operating panel
2
Connection for the coolant pre-heater
3
Motor block
4
Coolant pre-heating
The ideal coolant pre-heating period is 2-3 hours before the machine is started. A pre-heating peri‐
od of more than 3 hours is not necessary, as the maximum effect has already been achieved within
this period (thermal balance).
Continuous operation of maximum 6 hours must be followed by a rest of approximately 3 hours.
4.6.3.2 Option bc
Frost protection
Control air is mixed with an alcohol-based antifreeze to prevent control and regulating devices
freezing. This considerably lowers the freezing point of any moisture in the air.
4
Design and Function
4.6
Options
46
Operator Manual Screw Compressor
M27
No.: 9_9548 05 USE
Содержание M27
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