Filling The Boiler; Draining The Boiler; Start-Up; Switching Off - Truma Combi E Bedienungsanleitung

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 pre-
selecting 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 (d) 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.

Start-up

Combi
The interior can be heated either with or without water, de-
pending on the setting.
Combi E
The interior can be heated in gas, electrical or mixed mode,
either with or without water, depending on the setting.
Check whether the power supply fuse protection at
the camp site is adequate for the 900 W (3.9 A) or
1800 W (7.8 A) that have been selected using the power
selector switch.
The cable drum must be fully unwound in order to prevent
the power cable from overheating.
– Check to make sure the cowl is unobstructed. Be sure to
remove any covers that may be present.
– Open the gas cylinder and the quick-acting valve in the gas
supply line.
– Fill boiler with water if necessary (see "Filling the boiler").
– Switch on the unit on the control panel.

Switching off

– Switch the heater off on the control panel.
– The switch-off procedure may be delayed by several min-
utes because of internal heater operations.
Always drain water contents if there is a risk of frost!
If the appliance is not used for a long period, close the quick-
acting valve in the gas supply line and the gas cylinder.

Maintenance

Only original Truma parts may be used for maintenance and
repair work.
– Clean the compartment where the unit is installed at least
once annually.
– Have an expert check the unit for dirt and clean it if
necessary.
– The safety/drain valve must be operated regularly (at least
twice annually) to remove limescale deposits and to be cer-
tain that it is not blocked.
We recommend the use of suitable commercially available
products to clean, sterilise and maintain the boiler. Products
containing chlorine are not suitable.
The effectiveness of the use of chemicals to combat micro-
organisms in the appliance can be increased by heating the
water in the boiler to 70 °C at regular intervals.
Combi E only
– Select "Gas mode".
– Set the water temperature to 60 °C.
– Switch on the appliance.
Once the water in the boiler has reached a temperature
of 60 °C, the burner will switch off. The appliance must
stay switched on for at least 30 minutes and no hot water
may be removed. The residual heat in the heat exchanger will
heat the water up to 70 °C.
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