Operation Manual

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16 Caravan - 02-08 - DET-0030-07E
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Appliances
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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 240 V AC/12 V DC transformer (Fig. 134,2) 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:
The indicator lamp (Fig. 134,5) lights up in green: Regulation in operation
The indicator lamps (Fig. 134,4 and 6) light up in red: Waste water pipes
are warmed
A test button (Fig. 134,3) 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 240 V power supply (see section 9.8.1).
Turn switch (Fig. 134,1) on the transformer (Fig. 134,2) to "ON".
Switching off:
Turn switch (Fig. 134,1) on the transformer (Fig. 134,2) to "OFF".
Always only press the test button briefly.
The warming unit only functions when the vehicle is connected to a 240 V
power supply.
Fig. 134 Transformer with control unit