Other Features
70
ignition unit is switched OFF. The dashboard
telltale light will illuminate to indicate when the
burner is ON.
Hot combustion gases are diverted at the end of
the flame pipe and are then forced through the
indirect heating surfaces of the heat exchanger.
The heat exchanger transfers the heat to the
coolant water passing through the heat
exchanger.
The heater is thermostatically controlled and
operates intermittently (i.e., the switched-on time
of the burner varies depending on the heat
requirement). The water temperature is
controlled by the built-in water thermostat.
The water circulation pump remains in operation
as long as the heater is operating, even during
the regulated intervals and during the delayed
cut-out of the heater. The pump can also be
operated independently of the heater by means
of an appropriate circuit. The heater can be
switched ON at any time (i.e., during the delayed
cut-out period). Ignition takes place after the
delayed cut-out time expires.
ENGINE COMPARTMENT R.H. SIDE 18607
SWITCHING THE HEATER OFF
The fuel supply is interrupted when the heater is
switched OFF. This causes the flame to go out
and a delayed cut-out of 2.5 minutes begins.
The circulating combustion air flushes the
remaining combustion gases out of the chamber
and cools off the heated parts on the exhaust
side of the heat exchanger. The water
circulation pump continues to transfer the latent
heat present in the heat exchanger, thus
preventing hot spots. Once the delayed cut-out
time expires, both the combustion air blower and
the water circulation pump switch OFF
automatically. A cut-out will automatically take
place in case of heater failure. Refer to
Technical Information chapter for additional
information.
COOLANT HEATER TIMER
The timer, located on L.H. lateral console is
used to program the starting and stopping time
of the preheating system and to give Fault
Codes. The system indicator light, located on
the timer, illuminates when the system is
functional.
CAUTION
The preheating system should not operate for
more than one hour before starting engine as
this could discharge batteries.
WARNING
Preheating system must not operate when
vehicle is parked inside or during fuel fill stops.
NOTE
Preheating system uses the same fuel as the
engine.
Timer operating instructions (Webasto)
WEBASTO 22223
These instructions refer to the Webasto timer
illustrated above.
Remaining Operating Time
The remaining operating time refers to the
period of time the heater still continues to remain
in operation. It may be changed while the
heater is in operation.
Setting the Digital Timer
After the power has been connected, all
symbols on the digital display are flashing. The
time of the day and the day of the week must be
set.
All flashing symbols of the timer can be set by
means of the Forward (9) or Reverse (8)
buttons.
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