Installing The Frostcontrol (Safety/Drain Valve); Installing The Safety/Drain Valve; Water Pipe Connection / Routing - Truma Combi Einbauanweisung

Installing the FrostControl (safety/drain valve)

The FrostControl must be installed in the immediate vicinity of
the unit in the heated room in a location that is easily acces-
sible to the user. Make sure that rotary switch (30) and push-
button (31) can still be operated.
When selecting a location, please ensure that the
FrostControl (24) is not installed in the vicinity of external
heat sources (e.g. power supplies) or in the immediate prox-
imity of warm air ducts.
Water removal can take place directly to the outside in a
splash-protected location (fit splash guards if necessary).
Drill a hole (18 mm diameter) in the floor of the vehicle. At-
tach the hose (24b) to the drainage socket (24a), insert both
through the vehicle floor and route to the outside. Align the
drainage socket centrally to the hole. Secure the FrostControl
with two B 5.5 x 25 screws (included with delivery) without
tension. Screw in the screws vertically. Seal gap between hose
and hole with plastic body sealant from below. (See figure 16 –
Example of an installation with flexible hoses Ø 10 mm.)
24
31
31
25
Figure 16

Installing the safety/drain valve

Fit safety/drain valve (24) in easily accessible location in the vi-
cinity of the device. Ensure that the lever can still be operated.
Water removal can take place directly to the outside in a
splash-protected location (fit splash guards if necessary).
Drill a hole (18 mm diameter) in the floor of the vehicle. At-
tach the hose (24b) to the drainage socket (24a), insert both
through the floor and route to the outside. Secure the safety/
drain valve in place with 2 screws. (See figure 17 – Example
of an installation with fixed duct routing Ø 12 mm.)
25
24b
Figure 17
30
23
24a
24b
24
23
24a
Ø 18 mm

Water pipe connection / routing

In order to ensure that the connected components will work,
the water pipes must be kept as short as possible, and free of
kinks and tension.
Route all water lines so they slope downwards to the
safety/drain valve. No claims may be made under the
warranty for damage caused by frost.
If a water supply is being installed in the vehicle, it must be
ensured that sufficient room is left between the water pipes
and the heat source (e.g. heater, warm air duct).
A water pipe may only be routed at a distance of 1.5 m from
the heater at the warm air duct. The Truma SC hose clip
(part no.: 40712-01) can be used from this distance. With
parallel routing (e.g. through a wall) a spacer (e.g. insulation)
must be fitted in order to avoid contact.
Ensure that the cold water supply does not come into
contact with cold bridges (e.g. the outer wall) in order to
prevent freezing.
Connect cold water supply (23) to safety/drain valve (24).
The included elbow fittings (27 + 28) must always be
used in order to empty all water and to prevent the water
hoses on the unit from leaking in the long term.
Provide a supply line (25) for the cold water supply between
the safety/drain valve (24) and the boiler inlet.
Route the hot water supply line (26) from the elbow fitting
with integrated aeration valve (28) to the hot water consump-
tion points.
Attach elbow fitting (28 – with aeration valve) to upper con-
nection (hot water outlet) and elbow fitting (27) to lower
connection (cold water supply) of heater as far as it will go.
Pull in opposite direction to ensure that the elbow fittings are
securely attached.
Slide venting hose with an outer diameter of 11 mm (29) onto
the hose nozzle of the aeration valve (32) and route to the out-
side free of kinks. Radius of arc must not be less than 40 mm.
Cut off the venting hose about 20 mm below the vehicle floor
at a 45° angle relative to the direction of travel. (See figure 18 –
Example of an installation with flexible hoses Ø 10 mm.)
Figure 18
32
28
26
29
27
20 mm 45º
25
17