Webasto Thermo Top C Installation Instructions Manual - Danger
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Thermo Top C
9.2 Initial Start-up
WEBASTO HEATERS MUST BE SWITCHED “OFF” WHEN RE-FUELING AT
FILLING STATIONS AND/OR WHILE LOADING OR UNLOADING FLAMMABLE
MATERIALS FOR TRANSPORT, TO PREVENT THE RISK OF EXPLOSION. PLEASE
REVIEW OWNER’S MANUAL FOR SAFETY AND USE INSTRUCTIONS.
ATTENTION
The fan speed control knob has to be between low and maximum for blower operation while the Webasto
heater is on. The position of the control knob does not change the speed of the blower while the heater is on.
1 Set interior temperature control to maximum heat position (hot), fan speed between low and maximum, and
switch to defrost mode.
2 Start the vehicle engine and run on fast idle for 5 minutes to purge any remaining air from the Webasto
heater and coolant system. While the engine is running check:
• Hose connections for leaks.
• Coolant level in expansion tank. (Add coolant as needed)
3 Switch off the engine.
ATTENTION
More than one start-up attempt of the heater may be required to purge air from fuel system before heater will
start. Cycle heater Off and On after each failed start attempt until heater starts successfully. After 3 consecutive
unsuccessful start attempts, the Webasto control unit enters into heater lockout.
See Heater Lockout section for reset instructions.
4 Switch on the Webasto heater by means of the instant heat button on timer and check:
• Timer panel and instant heat indicator illuminates.
• Circulating pump in operation.
• Initiation of start-up sequence.
• Successful start-up and operation.
ATTENTION
The vehicle blower motor should come on after 5 minutes of heater operation, depending on outside air
temperatures.
5 Allow heater to run for 20 minutes or until coolant is heated to temperature. Re-tighten all hose clamps.
ATTENTION
Engine coolant temperature gauge may read lower than actual Webasto heater output temperature.
This is due to the location of the temperature gauge sensor on engine.
9.3 Concluding Work
– Check that all hose lines, hose clamps, pipe clips and electrical connections are secure. Secure all loose lines
and cables with nylon cable ties.
– Spray the heater components and electrical connections with an anti-corrosive wax coating.
– Install all vehicle parts, panels and components removed during heater installation.