Webasto Dual Top Evo 6 Operating Instructions Manual - page 15
Dual Top Evo 6
Filling the boiler
15
5
Filling the boiler
Fill the vehicle fresh water tank with your own hose, which is kept and stored clean.
Before filling the tank rinse the hose thoroughly (approx. 30 seconds).
WARNING
Always fill the tank with drinking water only and prevent dirt from getting into the
entire water supply system.
1
Fill the boiler with water at an ambient temperature of at least 6 °C, or select
– summer mode 40°C or 70°C,
see paragraph 4.2.1: "Summer mode (hot water only)", or
– winter mode (heating with hot water production),
see paragraph 4.2.3: "Winter mode (heating with hot water production)",
to make sure the electrical safety/drainage valve does not open!
2
Make sure that the boiler is filled with water.
3
Open hot water taps in kitchen, bathroom, shower, etc. (set pre-selecting mixing
taps or single-lever valves to "hot"). Leave water taps open until water flows out
of taps. The air is pressed out of the boiler in the process and it fills with water.
If just the cold water supply system is being operated, without using the boiler, the latter
also fills up with water. In order to avoid damage by frost, the water contents must be
drained by operating the electrical safety/drainage valve (move mode selector knob (A)
to drainage mode (6) for at least 5 seconds), also when the boiler has not been used.
As an alternative, two shut-off valves, resistant to hot water, can be fitted in front of
the cold and hot water connection.
When connecting to a central water supply (rural or city mains) or if using a more
powerful water pump, a pressure reduction valve must always be installed to prevent a
pressure above 2.5 bar developing in the boiler.
NOTE
Due to pressure differences in the system which result during filling or operation, small
water quantities (approximately 30 ml / 24 h) can be drained out of the boiler, however
there is no need to be concerned about complete draining.