Water Connection; Installing The Safety/Drain Valve; Water Line Routing - Truma BE 14 Instructions De Montage

Water connection

Any pressure or immersion pump up to 2.8 bar can be used to
operate the boiler. Any mixing battery with or without an elec-
tric switch can also be used.
Fig. A
If using immersion pumps, a non-return valve (3, not included
in scope of delivery) must be installed between the pump and
the first branch (arrow indicates flow direction).
Fig. B
When pressure pumps with a large switching hysteresis are
being used, hot water can flow back via the cold water valve.
We recommend installing a non-return valve (4, not included
in scope of delivery) between the outlet to the hot water tap
and the drain valve as a return flow inhibitor.
Hoses with an inner diameter of 10 mm that are pressure-
resistant (up to 3.5 bar) and hot water-resistant must be used
for connecting to the boiler and the safety/drain valve.
For rigid pipe installations (e.g. John Guest System) Truma
can supply the water connections (5 + 6), the safety/drain
valve (7) and a non-return valve (3 + 4) with a 12 mm diame-
ter inner connection as accessories.
If the boiler is connected to a central water supply (rural or
urban connection) or if powerful pumps are being used, a
pressure reducer must be used, which will prevent pressures
higher than 2.8 bar from occurring.
Water hoses must be as short as possible and free of
kinks. All hose rubber connections must be secured
with hose clips (including the cold water connection)! Before
the pressure relief valve triggers, warming of the water and
its resulting expansion may cause pressure of up to 4.5 bar to
occur (also possible with immersion pumps). The water lines
for connecting to the boiler and the safety/drain valve must be
drinking water safe, pressure resistant (up to 4.5 bar) and hot
water resistant up to +80 °C.
We recommend the use of hose clips (part no. 40712-
01) to attach the hoses to walls or the floor. If a gas
heater has been installed, the water hoses can be routed on
the warm air pipes using the hose clips to protect them from
frost.
Fig. 1
In order to ensure that all of the water in the boiler is
drained, the provided elbow fitting with aeration valve (5)
must always be used at the hot water connection!
Route all water lines so that they slope downwards to
the safety/drain valve! There shall be no claims un-
der guarantee for damage caused by frost!

Installing the safety/drain valve

Figs. A + B
Fit safety/drain valve (7) in an easily accessible location in the
vicinity of the boiler. Drill hole with diameter of 18 mm and in-
sert the drainage socket with hose (8). Secure the safety/drain
valve in place with 2 screws. Water removal can take place
directly to the outside in a splash-protected location (fit splash
guards if necessary).
6

Water line routing

1. Fig A + B
Connect cold water supply (9) to safety/drain valve (7). The
direction of flow is irrelevant.
2. Attach elbow fitting (5) with integrated aeration valve (15)
to hot water connecting pipe (top pipe) as far as it will go. Pull
in opposite direction to check that the elbow fitting is securely
attached.
Attach elbow fitting without aeration valve (6) to cold water
connection pipe (bottom pipe) as far as it will go. Pull in
opposite direction to check that the elbow fitting is securely
attached.
Slide venting hose with outer diameter of 11 mm (14) onto
hose nozzle of aeration valve (15) and route to the outside.
Radius of arc must not be less than 40 mm.
Fig. 2
JG
20 mm
Fig. 3
Cut off the venting hose about 20 mm below the vehicle floor
at a 45° angle relative to the direction of travel.
3. Fig A + B
Manufacture a hose connection (16) for the cold water supply
between safety/drain valve (7) and elbow fitting (6 – lower
pipe) at the boiler.
4. Route hot water supply line (17) from elbow fitting with
integrated aeration valve (5 – upper pipe) to hot water con-
sumption points.
15
5
14
6
20 mm 45º
Flexible hose installation
15
5
Ø 12 mm
14
6
45º
Rigid pipe installation
(e.g. John Guest System)