Crane operation
11.7 Heating and air-conditioning system
Operating Manual GMK6300L 3 112 xxx en 11 - 135
xx.xx.xxxx
 11.7.3             Auxiliary water heater
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The batteries will be drained if you operate the auxiliary heater with the 
engine switched off. You must recharge the batteries at shorter intervals if 
you use the auxiliary heater frequently! 
You can use the auxiliary water heater to:
– Preheat just the engine or 
– Preheat the engine and crane cab simultaneously. 
Preheating 
the engine
If only the engine is to be preheated, adjust the heating system as follows: 
• Switch (1) to position Warm.
• Switch (2) to position Fan off.
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