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Maintenance and Safety Instructions
Commissioning may not be carried out after the unit has been checked exclusively by
Webasto-trained personnel. The unit may only be installed professionally in accordance
with the installation instructions.
Type approval in accordance with the regulations ECE-R 122 (heating) and ECE-R 10 (EMC) is
in place for the Thermo Pro 90 HDD water heater in the area covered by European Directive
70/156/EEC and/or EC/2007/46 (for new vehicle types from 29/04/2009).
The year of first commissioning is marked on the heater's type label.
Danger of explosion
and suffocation
The heater may not be operated:
– at filling stations and tank facilities.
– at locations where highly flammable gases or dust can form, or
at locations where highly flammable liquids or solid materials
are stored (e.g. near fuel, coal and wood dust, grain storage
areas, dry grass and leaves, cardboard boxes, paper, etc.).
– in closed rooms (e.g. garages), nor with time pre-selection or
the Telestart function.
The heater may not:
– be exposed to storage temperatures above +80°C (+120°C
excluding control unit). If this temperature is exceeded, the
electronics can be permanently damaged.
– be operated unless the water in the heating circuit contains at
least 33% quality antifreeze.
The heater:
– may only be operated with the fuel and the rated voltage speci-
fied on the type label.
– must be shut down by switching off immediately and removing
the fuse in case of heavy smoking, unusual combustion noises
or combustion odours.
– Restarting may not be carried out until after the unit has been
checked only by Webasto-trained personnel.
– must be operated for 10 minutes with a cold engine on the
lowest blower setting at least once per month.
– must be professionally checked annually, at the latest at the
start of the heating period.
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