Operation Manual

116 Caravan - 09-09 - DET-0030-09EN
Appliances
10
10.2.6 Ultraheat additional electric heater
The Ultraheat additional electric heater is built-in to the hot-air heater. There-
fore there are three heating options:
 Only the hot-air heater
 Hot-air heater and electric heater
 Only the electric heater
The vehicle can be heated more quickly with the additional electric heater.
Switching on:
 Connect the vehicle to the 240 V power supply (see section 9.8).
 Turn the rotary switch (Fig. 136,1) to the desired output level (500, 1000 or
2000 W).
 Turn temperature control knob (Fig. 136,3) to the desired output level.
Switching off:
 Turn the rotary switch (Fig. 136,1) to " " (Fig. 136,2).
10.2.7 Warming unit for waste water pipes
In order to prevent waste water pipes freezing up, the waste water pipes can
be electrically warmed.
When the warming unit is turned on, the temperature of the waste water pipes
is monitored by temperature sensors. If the temperature falls below 5 °C, the
heating elements are switched on and the waste water pipes are warmed. If
the temperature rises above a certain level, the heating elements are switched
off again.
 The additional electric heater only operates if the vehicle is connected to
the 240 V power supply.
 If the heater is operated by electricity and gas simultaneously, the addi-
tional electric heater switches off to prevent possible overheating by the
stronger gas burner.
Fig. 136 Operating unit for Ultraheat
additional electric heater
1 Rotary switch
2Off
3 Temperature control knob
 Always only press the test button briefly.
 The warming unit only functions when the vehicle is connected to a 240 V
power supply.