Truma Combi 6E - Boiler Filling and Draining; Filling the Boiler; Draining the Boiler

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Operating instructions
Filling the boiler
Check whether the safety/drain valve is closed (see “Closing the safety/drain
valve”).
When the temperature at FrostControl is below approx. 7 °C, first switch on the
heater to warm the installation compartment and FrostControl. After several
minutes, when the temperature at FrostControl is above 7 °C, the safety/drain valve can be closed.
– Switch on the power for the pump assembly (main switch or pump switch).
– Open hot water taps in the kitchen and bathroom (set preselecting mixing taps or single-lever
fittings to “hot”). Leave the valves open until the boiler has been filled by displacing the air and
water is flowing without interruption.
If only the cold water system is being operated without the boiler, the boiler also fills up with water.
To avoid frost damage, the boiler must be drained via the safety/drain valve, even if it was not
operated.
In the event of frost, filling may be prevented by frozen residual water. The boiler can be thawed by
turning it on briefly (no more than 2 minutes). Frozen lines can be thawed by heating the interior.
If the boiler is connected to a central water supply (rural or urban connection),
a pressure reducer must be used, which will prevent pressures higher than 2.8 bar
from occurring.
Draining the boiler
The boiler must be drained if the motor home / caravan is not being used during the frosty period.
– Switch off the power to the pump assembly (main switch or pump switch).
– Open hot water taps in kitchen and bathroom. In order to check the water that is flowing out,
place an appropriate container (capacity 10 litres) beneath the drainage socket of the safety/drain
valve.
– Open safety/drain valve (see “Opening the safety/drain valve”).
The boiler will now be drained directly to the outside via the safety/drain valve. Check whether all
of the water in the boiler (10 litres) has been drained into the container via the safety/ drain valve.
No claims may be made under the warranty for damage caused by frost.