Operating instructions

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and engaged.
Close the drain valve by activating the push button. The
push button must engage in position (U) “closed”.
Only when the temperature around the drain valve is
over around 7 degrees can it be closed manually with
the press button (“U” position) and the boiler lled.
Truma supplies a heating element (part no 70070-01)
as an accessory, which is inserted into the Frost Control
and xed in place with a retaining bracket. This heating
element heats the Frost Control to approx. 10 degrees
C when the Combi is switched on. This means that the
boiler can be lled after a shorter time, irrespective of
the temperature in the installation compartment.
Manual Operation of the drain valve
Turn the rotary switch by 180 degrees until it engages,
whereby the push button moves out (position W). The
water in the boiler drains out through the drainage muff
(X).
The Frost control drainage muff (X) must be
free of contamination (slush, ice, leaves etc)
at all times so the water can drain out easily!
There shall be no claims under guarantee for
damage caused by frost!
Filling the water heater
Check if the rotary switch for the drain valve (Frost
control) is set to “Operation” meaning that it is parallel
to the water connection and engaged.
Close the drain valve by pushing the button until it
engages.
When the temperature at Frost control is below about
7 degrees C, rst switch on the heater to warm the
installation compartment and Frost control. After
several minutes, when the temperature at Frost control
is above 7 degrees C the drain valve can be closed.
Switch on power for water pump (main or pump switch)
Open hot water taps in kitchen and bathroom, (set
preselecting mixing taps or single-lever ttings to
“hot”). Leave the ttings open for as long as it takes for
the boiler to displace the air and ll up and the water to
ow without interruption.
If just the cold water system is being operated
without using the water heater, the heater tank
also lls up with water. To avoid frost damage
the boiler must be drained through the drain
valve even if it was not operated.
When connecting to a central water supply
(rural or city mains) a pressure reduction valve
must always be installed to prevent above 2.8
bar from developing in the water heater.
Draining the water heater
Switch off power to water pump (main or pump switch)
Open hot water taps in kitchen and bathroom.
In order to check the water that is owing out, place an
appropriate container (capacity 10 litres) beneath the
drain valve (Frost control) drainage muff (X).
Turn the rotary switch on the drain valve by 180 degrees
C until it engages, whereby the push button moves out
and the drain valve opens.
Check whether all of the water in the boiler (10 litres)
has been drained into the container via the
drain valve.
There shall be no claims under guarantee for
damage caused by frost.
Taking into Operation
Heating is possible without restrictions with gas,
electrical and mixed operation, with or without water.
Check to make sure the cowl is unobstructed. Be sure to
remove any covers that may be present.
Turn on gas cylinder and open quick-acting
valve in the gas supply line.
Check whether the power supply fuse protection
on 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.
Summer Operation (Boiler operation only)
Select gas or electrical operation using the power
selector switch. Illumination of the yellow LED (G) on
the power selector switch indicates that the unit is
operating on 230 V.
Mixed operation (gas and electrical) is not possible in
summer mode. With this setting the unit automatically
selects electrical operation with a preselected power
setting of 900 W or 1800 W.
Move the rotary switch on the control panel to position
(I – summer operation) 40 degrees C or 60 degrees C).
The green (K) and yellow (P) LED’s light up.
When the selected water temperature is reached (40
degrees C or 60 degrees C) the heater shuts off and
they yellow LED (P) goes off.
Winter Operation
Heating with water temperature monitoring.
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