Joined: 15th Apr 2005
Ride: Falcon BA GT
By incorporating two electric drive motors coupled to a back swirl designed blade, maximum airflow in static conditions can be achieved with minimum disturbance to engine load.
Heat exchange from the vehicle engine via the radiator is maximized for best cooling efficiency; road economy and power are also maximized.
The electrical circuit consists of the main electrical harness, twin thermatic fan assemblies and a set of 4 relays and one temperature sensitive switch on V8 models and 6 cylinder vehicles.
On V8 and 6cyl models the one temperature switch is responsible for the control of the duty low speed fans and for the standby high speed fans which will operate in instances of high engine load for prolonged periods or when an engine overheating condition occurs.
Air-conditioner input is also incorporated so that when vehicle is static there is sufficient airflow over the condenser to exchange heat out of the A/C system.
An automatic self-test is performed upon power up of the ignition for the same period that the fuel pump activates for fuel rail priming. This ensures minimal engine damage if in the case of an overheating condition.
The electrical circuit is feed directly from the output terminal of the alternator and protected by a fusible link designed to blow at over rated fault currents. Grounding of the circuit is made directly at the battery negative post for the control circuit and at the closest possible point to the alternator for the power circuit. This ensures minimal voltage drop over the circuit.
For more details see http://www.norcom.net.au/~bpt/Thermo%20Fan%20Kit.htm
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