Karmann-Mobil DAVIS 540 2023, Operating Manual

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Heating
EN 57
8.8 Filling the Truma Combi D boiler (Davis LS only)
To fill the Truma Combi D boiler, the FrostControl drain valve has to be closed. The FrostControl drain
valve is located next to the heating in the bench seat compartment.
(See item 8.9 “FrostControl safety drain valve”)
8.9 FrostControl safety drain valve (Davis LS only)
For vehicles with LS specification (Lifestyle), the boiler of the heating is drained through the FrostControl
safety drain valve. This is a valve that automatically drains the water from the boiler at temperatures be-
low 7 °C in order to avoid frost damage. To close it, press the blue push button (2). To open the valve,
turn the blue rotary switch (1) 90° so that the blue push button (3) pops out.
FrostControl drain valve
1. Rotary switch 2. Push button, “closed” position
3. Push button, “open” position 4. Draining port
CAUTION
Risk of frost damage!
If there is a risk of frost, the heating boiler has to be drained completely.