12
Gas-connection muff (20) on the unit may not be shortened or bent.
Choose to route the pipes in a way that will facilitate removing the
unit for service tasks.
To connect, the UNF 1/2” –
20 (SAE Male AN Flare) gas inlet
connection (19) provided with the appliance must be used. The gas
inlet connection is preinstalled. Carefully counterhold with another
spanner when tightening!
For connection to 8 mm steel piping Dometic povides an adapter
UNF 1/2” x RVS 8, part no. 70020
-02700.
Fig. 21
Route the pipes in such a way that the appliance can be removed
again for servicing.
Refer to AS/NZS 5601.2
–
Gas Installations, for gas pipe sizing.
It is absolutely mandatory that the tightness of the gas installation
ist proved before starting up for the first time.
Check for gas leaks (do not check for gas leaks with a naked flame),
then check that the gas pressure is as follows:
LPG: 2.75 kPa
Keep the number of parting connections in the gas supply line in
rooms frequented by people to a technically feasible minimum.
The gas system must accord with the technical and administrative
provisions of the individual country of use (in Australia, AS/NZS 5601
for motor vehicles).
Water connection
For operating the water heater it is possible to use all pressure
pumps and submergible pumps up to 0.28 MPa, also all mixing taps
with or without electrical switch.
In order to guarantee complete emptying of the water
content and to prevent pressures of greater
than 0.45 MPa occurring in the boiler, the enclosed pressure
reducer (22), the enclosed water connectors (27 + 28) and the
enclosed safety (pressure relief) drain valve (24) must be used!
When using pressure pumps with high switching hysteresis, hot
water may flow back through the cold water tap. To prevent the
backflow, we recommend that a non-return valve (nrv
–
not
included in the scope of supply) be fitted between the outlet to the
cold water tap and the drain valve.
Fig. 22
The supplied water connectors (27 + 28) and safety/drain
valve (24) have a 12 mm rigid piping connection (e. g. John
Guest System). For connecting to rigid pipes with other diameters
appropiate adapters (not included in scope of delivery) must be
used.
Hoses with a diameter of 12 mm that are drinking water compatible,
pressure-resistant (up to 0.45 MPa) and hot waterresistant up to
+80 °C must be used to connect the unit and the accessories. We
recommend the use of John Guest pipes, insertion sleeves and hose
clamps.
As accessories Truma supplies the water connectors (27 + 28) and
safety/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 to safety/drain valve!
There shall be no claims under guarantee for
damage caused by frost!
Mounting the safety/drain valve
Mount the safety/drain
valve (24) to an easily
accessible point close to
the device.
The draining is to be
directly to the outside at a
position protected against
splash water (apply splash
guard, if necessary).
Drill hole with 18 mm
diameter and pass through
discharge socket with hose
(24a). Fasten safety/ drain
valve with 2 screws.
Installation of the
pressure reducer
The pressure reducer (22)
must be fitted between
the safety/drain valve and
water pump in accordance
to the
direction of flow.
Fig. 24
Water pipe routing
Water pipes (hoses) need to be installed as short as possible 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 warmed, the resulting expansion may create pressure levels
up to 0.45 MPa until the safety valve triggers (also possible for
submersible pumps).
When installing a water supply into the vehicle, please ensure that
there is an adequate distance between the water pipes (hoses) and
the heat source (e.g. heater, warm air duct).
