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As accessories Truma supplies the water connectors (27 + 28)
and drain valve (24) with a 10 mm / 3/8" diameter hose nipple.
The included elbow fittings (27 + 28) must always be
used in order to completely empty the water and prevent
the water pipes on the unit from leaking over the long-term!
Elbow fitting (28 – with aeration valve) is connected to the
upper warm water connection; the second elbow fitting (27) is
connected to the lower cold water connection.
Route all water lines so they drop down into drain
valve! No warranty claims for frost damage will be
accepted.
Mounting of the discharge pipe
The discharge pipe (Fig. 25 - 19a) is to be installed
directly to the outside at a position protected against
splash water (apply splash guard, if necessary).
– There must be no tap, valve or other restrictions in
the discharge pipe.
– The discharge pipe must not be connected to other
piping.
– The discharge pipe must fall continously and free
of kinks from the P&T relief valve to the point of
discharge.
– The discharge pipe must not discharge into a safe
tray.
– Drill a hole with 22 mm diameter and pass through the dis-
charge pipe.
19a
Ø 22 mm
Fig. 25
Mounting the drain valve
Mount the drain valve (24)
at an easily accessible
point close to the device.
The draining is to be di-
rectly to the outside at a
position protected against
splash water (apply splash
guard, if necessary).
Drill hole with 18 mm di-
ameter and pass through
discharge socket with
hose (24a). Fasten drain
valve with 2 screws.
24
24a
Ø 18 mm
Fig. 26
Installation of the pressure reducer
Depending on the scope of supply – pressure reducer A or B
has to be installed.
For characteristics of the pressure reducer – see „Water
pressure reducer" page 9.
Pressure reducer A
The pressure reducer (18) must be fitted between the drain
valve and water pump in accordance with the direction of
flow (indicated by arrow).
Fasten the pressure reducer to the floor.
18
Fig. 27
Pressure reducer B
The pressure reducer (18) must be fitted between the drain
valve and water pump in accordance with the direction of
flow (indicated by arrow).
18
3 Nm
Fig. 28
Water pipe routing
Water pipes (hoses) need to be installed as short as pos-
sible without kinks. All hose connections must be secured
with hose clips or John Guest connections with safety rings
(even cold water)! When the water is heated, the resulting
expansion may create pressure levels up to 450 kPa until the
P&T relief valve or drain valve triggers (also possible for sub-
mersible pumps).
When installing a water supply into the vehicle, ensure that
there is an adequate distance between the water pipes (hos-
es) and the heat source (e.g. heater, warm air duct).
Hose clips SC (part no. 40712-01) are suitable for fastening
the pipes (hoses) to walls or the floor. These hose clips also
make it possible to route water pipes (hoses) on the heater's
warm-air distribution pipes as a way to avoid the danger of
frosting.
A water pipe (hose) may only be fitted at a clearance of 1.5 m
to the heater on the warm air duct. The Truma hose clip SC
can be used if this distance is observed. In the case of parallel
installations, e.g. openings through a wall, a spacer element
should also be attached (e.g. insulation) to prevent contact.
Connect cold water supply (23) to drain valve (24). To guar-
antee the correct function of the drain valve, the water pipes/
hoses need to be installed without tension!
2 x
3 Nm
15
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