14
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 water pump (main switch or
pump switch).
– Open hot water taps in kitchen and bathroom, (set prese-
lecting mixing taps or single-lever fittings to “hot”). Leave
the fittings open for as long as it takes for the boiler to
displace the air and fill up, and the water to flow 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 residual
water that has frozen. The boiler can be thawed out again
by briefly starting it up (max. 2 minutes). Frozen lines can be
thawed out by heating up the interior.
If connected to a central water supply (rural or urban
connection), a pressure reducer must be used, which
will prevent pressures of greater than 2.8 bar from occurring
in the boiler.
Draining the boiler
If the motor home / caravan is not used during the
winter, the boiler must be drained!
– 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 is now drained directly to the outside via the safety/
drain valve. Check whether all of the water in the boiler (10 li-
tres) has been drained into the container via the safety/drain
valve.
There shall be no claims under guarantee for damage
caused by frost!
Start-up
The use of the installed control panels (analogue /
digital) is described in separate operating instructions.
Combi CP plus ready
The interior can be heated either with or without water,
depending on the setting.
Combi E CP plus ready
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 gas cylinder and quick-acting valve in gas supply line.
– Fill boiler with water if necessary (see "Filling the boiler").
– Switch off unit at control panel.
Switching off
– Switch off heater at 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 unit is not going to be used for a long period of time,
close the quick-acting valve in the gas supply line and turn off
the gas cylinder.
Maintenance
Only original Truma parts may be used for maintenance and
repair work!
The device must be descaled on a regular basis (at least twice
a year).
We recommend the Truma system care set for cleaning,
disinfecting and looking after the boiler. Other products – in
particular products containing chlorine – are unsuitable.
The effectiveness of the use of chemicals to combat micro-
organisms in the unit can be increased by heating the water
in the boiler to 70 °C at regular intervals.
Combi E
Select "Gas" mode.
– Set water temperature to 60 °C.
– Switch on device.
Once the water in the boiler has reached a temperature
of 60 °C, the burner will switch off. The unit must stay
switched on for at least 30 minutes and no warm water may
be removed. The residual heat in the heat exchanger will heat
the water up to 70 °C.
Fuses
Fuse 12 V
The fuse is in the electronics beneath the connection cover.
Always replace the fuse of the unit with an identical fuse.
