Webasto Dual Top Evo 6 Operating Instructions Manual - page 19
Dual Top Evo 6
Operating Instructions
19
3.7
Frost
There are several features that protect the water supply system against frost.
• Drain water contents manually when there is risk of frost and when storing the
vehicle for a longer period.
See paragraph 3.7.1: "Draining the boiler manually".
• The boiler is drained automatically in case you forgot to drain manually.
See paragraph 3.7.3: "Draining the boiler automatically".
• In case you don’t want to drain the water supply system and you don’t heat the
interior of the vehicle, you can select the frost protection mode.
See paragraph 3.7.4: "Frost protection mode".
3.7.1
Draining the boiler manually
Drain water contents manually when there is risk of frost and when storing the vehicle
for a longer period.
1
Interrupt power for vehicle system water pump (main switch or pump switch,
depending on instructions of the vehicle manufacturer).
2
Open hot water taps in kitchen, bathroom, shower, etc. (set pre-selecting mixing
taps or single-lever valves to "hot").
3
Make sure the device is switched on.
4
Press MENU.
5
Press
and
to select “ Draining Boiler”.
6
Press OK.
7
“Press OK to confirm boiler drainage” on display.
8
Press OK.
9
“Draining... Press MENU to select heating operation”and“Press STOP
to abort drainage” on display.
“ ” (9) on display.
NOTE
Any kind of heater operation will be stopped when manually starting boiler
drainage.
NOTE
To stop drainage, see paragraph 3.7.2: "How to stop draining the boiler".
The boiler content is now discharged to the outside through the electrical safety/
drainage valve.
Place a container beneath the outlet to check whether the water in the boiler has
completely drained away (approx. 10 litres!).
After approx. 90 min, text “Drainage completed” appears.
10
Press OK to end manual drainage.
NOTE
Any kind of water from the vehicle has to be discharged at a proper disposal facility.
NOTE
Be aware of drainage behaviour when starting a heating operation (by menu guidance)
without aborting or completing drainage procedure:
a) Drainage aborted when one of the following modes is selected:
- Summer mode (hot water only)
- Winter mode (heating with hot water production)
- Frost protection mode;
b) Drainage continued in case of
- Winter mode (heating without hot water production).