7
6. Seal the gap between the hole (6) and the condensation
tube (7) with non hardening mastic – do not use silicone!
7. Mount the grille (8). Press the entire cowl assembly onto the
vehicle wall and fasten with 6 screws (5).
8. Screw the water heater securely to the floor of the vehicle
with at least two shackle plates (9) with the screws provided,
B 5.5 x 25, on suitable base (plywood panel, laminated wood
strips or metal base).
Water connection
All pressure and submergible waterpumps up to 2.8 bar and all
mixed combination sets with or without an electrical switch,
can be used for operating the water heater.
If connecting to a central water supply (rural or city connec-
tion) or when using more powerful pumps, a pressure reduc-
er must be used which prevents pressures of greater than
2.8 bar occurring in the system.
When using submergible pumps, a non-return valve (10 – not
included in the scope of supply) must be fitted between the
pump and the first branch point (arrow points in direction of
flow).
When using pressure pumps with high switching hysteresis,
hot water may flow back through the cold water tap. To pre-
vent the backflow, we recommend that a non-return valve
(11 – not included in the scope of supply) be fitted between
the outlet to the cold water tap and the drain valve.
In order to guarantee complete emptying of the water
content and ongoing sealing tightness of the water con-
nections, the enclosed water connectors (12 + 13) and the
safety (pressure relief) drain valve (14) must be used!
John Guest System rigid pipe routing
The water connectors (12 + 13) and safety/drain valve (14)
supplied with the Truma Ultrastore have a 12 mm diameter fit-
ting and are only approved to use with Original John Guest
piping.
For connecting to rigid pipes with other diameters appropiate
adapters (not included in scope of delivery) must be used.
Flexible water hose routing
As special accessories Truma supplies the water connectors
(12 + 13) and safety/drain (14) valve with a 10 mm diameter
hose nipple (please refer to page 11).
Pressure-resistant (up to 3.5 bar) and hot water-resistant water
hoses in food quality with an internal diameter of 10 mm must
be used.
Route water hoses so that they are as short and free of
kinks as possible. All hose connections must be secured
using hose clamps (also for cold water)! Pressures of up to
3.5 bar can occur in the safety/drain valve (also with submergi-
ble pumps) because of the heat of the water and the resulting
expansion.
All hot water hoses should be routed in a descending
manner to the safety/drain valve! Otherwise no guaran-
tee of protection from frost!
Installation of the safety (pressure relief)
drain valve
Install the safety/drain valve
(14) at a place which is easily
accessible, near the water
heater. Drill hole with 18 mm
diameter and pass through
discharge socket with hose
(15). Fasten safety/drain valve
with 2 screws. The draining is
to be directly to the outside
at a position protected
against splash water (apply
splash guard, if necessary).
Water pipe routing
1. Connect cold water supply (16) to safety/drain valve (14).
Direction of flow is unimportant.
