Operation Manual

Appliances
10
111Caravan - 12-11 - EN
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 tempera-
ture rises above a certain level, the heating elements are switched off again.
The 230 VAC/12 VDC transformer (Fig. 117,2) is installed in the wardrobe or in the
storage area beneath the seating group, depending on the model.
The control unit is integrated in the transformer housing. The control lamps have
the following meanings:
z The indicator lamp (Fig. 117,5) lights up in green: Regulation in operation
z The indicator lamps (Fig. 117,4 and 6) light up in red: Waste water pipes are
warmed
A test button (Fig. 117,3) is integrated in the housing with which the control unit
can be operated for a short time. By pressing the test button, the function of the
warming unit can be tested, even if the ambient temperature is above 5 °C.
Switching on:
 Connect the vehicle to a 230 V power supply (see Section 9.8.1).
 Turn the switch (Fig. 117,1) on the transformer (Fig. 117,2) to "ON".
Switching off:
 Turn the switch (Fig. 117,1) on the transformer (Fig. 117,2) to "OFF".
Z Always only press the test button briefly.
Z The warming unit only functions when the vehicle is connected to a 230 V
power supply.
Fig. 117 Transformer with control unit