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Truma Combi G comfort / comfort plus
Fig� 4
1
Pressure relief / drain valve
2
Lever
3
Drainage socket (extends through RV's undercar-
riage to outside)
5.4.1 Opening the pressure relief /
drain valve
NOTICE
Danger of damage to the Combi G and the
RV due to an obstructed drainage socket!
The drainage socket (Fig� 4-3) must be unob-
structed and kept clear of obstructions such as
slush, ice, or leaves to ensure that water can
drain properly� No warranty claims for frost
damage will be accepted�
Move the lever so that it is in the "draining" position
(Fig� 5-2)� Water will drain from the hot water con-
tainer via the drainage socket (Fig� 4-3)�
Fig� 5
1
lever in "valve closed during furnace
operation" position
2
lever in "draining" position
5.4.2 Closing the pressure relief / drain valve
Move the lever so that it is in the "closed" position
(Fig� 5-1)�
34020-01601 · 00 · 04/2024
1
2
3
1
2
1
5.5
Filling the water container
Make sure that the pressure relief / drain valve is
closed (Fig� 5-1)�
Switch on the power for the water pump (main
switch or pump switch)�
Open the hot water taps in the kitchen and bath-
room (set preselecting mixing taps or single-lever
fittings to "hot")� Leave the fittings open until the
water container has been filled by displacing the air
and water flows without interruption�
If only the cold water system is operated, the water
container will also fill with water� To prevent frost
damage, if there is a risk of frost, the water container
must be emptied via the pressure relief / drain valve,
even if it is not being used�
In the event of frost, filling and draining the water
system may be prevented by frozen residual water�
The water container can be thawed by starting the
system for a short time (min 5 minutes)� Frozen lines
can be thawed by heating the interior of the vehicle�
If the water container is connected to a central water
supply (city water), a non-return valve must be installed
to ensure that non-drinking water cannot flow back or
be sucked back into the central water supply from the
vehicle�
NOTICE
Water damage caused by high water pres-
sure
If the water container is connected to a central
water supply (city water), pressure in the water
container can exceed 40�6 psi� (2�8 bar)�
Install a pressure reducer on a central water
supply system�
5.6
Draining the water container
NOTICE
Frost damage caused by water in the water
container
Drain the water container if the motor home /
caravan is not being used during the frost
period�
Switch off the power to the water pump (main or
pump switch)�
Open hot water taps in the kitchen and bathroom�
To check the draining water, place a suitable con-
tainer with 2�6 Gal� (10 litres) beneath the drainage
socket (Fig� 4-3)�
Open the pressure relief / drain valve (see "5�4�1
Opening the pressure relief /
drain valve" on page 9)�
Operation
EN
9
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