Webasto Thermo Top Z Shop Manual page 25

Thermo Top E and Z/C
6 Functional Checkouts
6.1 General
This section describes the tests on the heater and its
components in installed and removed condition as well as
the test of the Timer and the Telestart T60/T70 to prove
serviceability.
WARNING
The heater must not be operated in enclosed areas like
garages or workshops not provided with exhaust
ventilation facilities.
6.2 Functional Tests in the Vehicle
6.2.1 Heating Operational Test
(Thermo Top E and C)
1. Ensure that fan switch is set to the lowest stage or the
stage recommended in the operating instructions.
2. Ensure that the air intake is free from foreign matter
(snow, leaves etc.) and that the pollen or dust filters
(if applicable) are unobstructed.
3. Ensure that that the vehicle coolant circuit and fuel
system have been thoroughly bled in accordance with
manufacturer's instructions.
Take the time of the following functions with a stop
watch or any other suitable means. The exact times for
the heaters, Diesel and fuel version, are described in
Section 3.
4. Switch heater on using Timer or Telestart.
• Activation of heater causes circulation pump and
combustion air fan to operate. Operating noise is
audible. Vehicle heating air fan operates after
coolant has reached a temperature of 30° C.
• After approx. 130 seconds the heater starts to
operate which can be verified by exhaust
emissions from the exhaust muffler or exhaust
pipe.
5. Allow heater to continue operation. Check heating
efficiency at air exit of vehicle heating air fan.
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NOTE
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6 Functional Checkouts
NOTE
Heating efficiency depends on several factors: for
assessment use outside temperature, type of vehicle,
engine temperature or type of heater integration in the
vehicle's cooling system, the quantity of the coolant to be
heated and the time passed since heater start.
NOTE
Take the time of the following functions with a stop watch
or any other suitable means.
6. Switch heater off using Timer or Telestart.
• Switch off causes a run-down of approx.
110 seconds out of part load operatimon or of
175 seconds out of full load. Verification by
stoppage of exhaust emissions and audible
continuation of circulation pump operation.
• After run-down the heater will be completely
deactivated (with ignition off).
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