Webasto GBW 300 Installation instructions manual - page 35
Other regulations
GBW 300
32
2
Other regulations
Follow the instructions supplied by the vehicle manufacturer to check
the cooling water level. The water in the heating system must contain at
least 20 % branded anti-freeze. If you use pure water, if it overheats you
may lose some of the cooling water as a result of its low boiling point,
and this will then have to be topped up.
Additives in the heating system must not be aggressive to metal, plastic
or rubber and must not form any deposits.
The opening pressure in the vehicle’s cooling system (generally speci-
fied on the coolant sealing cover) must be between 0.4 and 2.0 bar.
A temperature of 85 °C (storage temperature) must not be exceeded in
the vicinity of the control module (for example when competing painting
work on the vehicle).
If this temperature is exceeded, the electronic systems may suffer
permanent damage.
Heaters in vehicles that are not covered by the German Road Traffic Act
(if applicable regulations are in force) must be subject to an acceptance
test by the appropriate testing authority.
Failure to follow the installation instructions and the notes
contained therein will lead to all liability being refused by Webasto
The same applies if repairs are carried out incorrectly or with the
use of parts other than genuine spare parts. This will result in the
revocation of the type licence for the heater and therefore the
general operating licence for the vehicle.
Since the combustion noise of the heater is hardly audible, special care
is required when carrying out work near the heater. In any event the
heater should be switched off and secured to prevent its being switched
on again by accident.