Webasto Dual Top Evo 6 Operating Instructions Manual - page 13
Dual Top Evo 6
Operating Instructions
13
The drainage outlet of the electrical safety/drainage valve must always be kept clear
(free from dirt, ice, leaves etc.)!
To avoid water loss and to protect the heater and boiler against frost, select the frost
protection mode (5).
NOTE
When the frost protection mode is selected, diesel and electrical power are used. Make
sure that there's enough diesel in the tank and the battery is charged. Check this
frequently.
NOTE
Draining the boiler as well as the frost protection mode protect the heater and boiler
against frost. Not all water lines in the vehicle can be protected against freezing due to
installation variations.
When storing the vehicle, either choose a place that is well protected against low
temperatures or drain the whole water system, including all lines and tubes (e.g. with
air pressure, see note in paragraph 4.3.1: "Draining the boiler manually").
There shall be no warranty claims for damage caused by frost!
NOTE
Drainage can be stopped by moving mode selector knob (A) to drainage mode (6) for
at least 5 seconds and then releasing the knob.
4.3.3
Frost protection mode
This mode is a safety feature for the heater only. It does not prevent the water circuits
inside and outside the vehicle from freezing.
Store the vehicle at a place that is well protected against frost or drain water contents
if there is a risk of frost!
To avoid freezing of the tubes and the boiler move mode selector knob (A) to frost
protection mode (5).
The indicator (C) on the control panel lights green when the equipment is switched on.
The red indicator on the mode selector knob (A) illuminates.
The heater functions as in the winter mode, heating with hot water production, but
with lower values for air and water temperatures.
NOTE
Make sure that the boiler is filled with water when choosing frost protection mode.
NOTE
The frost protection mode enables the user to park the vehicle for a short time without
being observed and without having to worry about frost and frost damage.
During winter storage or when parking the unused vehicle for a longer time, the entire
water system should be drained and the heater disconnected from the battery to avoid
unnecessary battery discharging or possible frost damage.