Fiat Ducato Owner's Handbook Manual page 61

– a control unit connected to the
heater/ventilation unit for automatic
operation;
– an electronic control unit to check
and adjusted the integrated heater
burner;
– a digital timer A-fig. 85 to start the
heater manually or to program staring
time.
fig. 85
60
GETTING TO KNOW YOUR VEHICLE
Downloaded from www.Manualslib.com
In cold weather, the supplementary
heater automatically warms and cir-
culates constant temperature fluid in
the engine cooling system for the time
required to ensure optimal engine ig-
nition and cab temperature conditions.
The heater can be started automat-
ically (programmed by means of the
digital timer) or manually by pressing
the "heat now" button on the timer.
When the heater is turned on (au-
tomatically or manually), the electronic
control unit operates the fluid circu-
lation pump and safely ignites the burn-
er.
manuals search engine
The electronic control unit also con-
trols the circulation pump delivery in
order to reduce initial heating time.
When the fluid reaches a temperature
of 30°C, the control unit operates the
passenger compartment ventilation
fan.
When the fluid temperature reaches
72°C, the electronic control unit re-
duces the burner power and stops op-
eration when it reaches 76.5°C. The
timer, circulation pump and heater fan
are kept running. When the fluid tem-
perature drops under 71°C the con-
trol unit automatically turns the burn-
er back on.