Thermo Top Evo 6 Operating tests
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6 Operating tests
6.1 General
This section describes the tests of the heater and its compo-
nents in the installed and the removed state.
6.2 Operating checks in vehicle
1. Set the vehicle van to fan speed 1 - 2 or to the speed rec-
ommended in the vehicle-specific operating instructions.
2. Make sure that the fresh-air inlet is clear of foreign bod-
ies (snow, leaves, etc.) and any pollen and dust filters are
clear.
3. Make sure that the coolant circuit and the fuel system
are carefully bled in accordance with the vehicle manu-
facturer's specifications.
4. Switch on the heater with the heater control.
When the heater is switched on, the circulating pump
and the combustion air fan run. This is audible. The vehi-
cle fan is switched on by the heater when the coolant
temperature has reached 30 to 50 °C (vehicle-specific).
After a maximum of 240 sec, exhaust can be seen exiting
at the exhaust muffler or connection piece.
5. Allow the heater to run in the combustion mode. Check
the heating effect at the outlet nozzles of the vehicle fan.
NOTE
The heating effect is dependent on several factors:
To evaluate it, the outside temperature, the vehicle model,
the engine temperature, the type of integration in the vehi-
cle cooling system, the quantity of coolant to be heated up
and the time since the start must be used for the evalua-
tion.The coolant temperature determined by the heater and
the coolant or engine temperature indicated by the vehicle
may differ considerably, as the respective sensors are
installed at different locations and may evaluate different
temperatures.
6. Switch off the heater again with the heater control.
A maximum run-on of 175 sec is activated when the
heater is switched off. This is audible due to a reduction
of the combustion noise. The continued running of the
combustion air fan with an increase in the speed after
approx. 60 sec is used for active cooling of the heater
and operation of the circulating pump.
This is followed by a complete switch-off.
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