Zac,
Using a standard Hella 4RA 30Amp relay and 10amp wire.
On the relay there are four terminals (30, 87,85, 86)
Terminal 30 goes to battery +ve (through a 15Amp fuse assembly)
Terminal 87 goes to the thermo fan +ve wire.
The other thermo fan wire goes to a good earth.
Terminal 86 also goes to earth
Terminal 85 goes to the output terminal of the temp switch.(If two terminal
model either terminal will do)
Temp switch input terminal goes to a switched +ve lead from ignition
switch.
I use an industrial water temperature controller switch made by LANDIS &
GYR (model "T80" with a range from 50 - 110 degrees C). These would be
available from most process control companies. These are rated at 10 times
the number of operational cycles of a Davies Craig unit, and have a better
accuracy when set.
This controller uses three terminals with the centre terminal going through
the fuse to battery positive. Either of the outer terminals is switched
power to the fan.
If you are going to be adding electrical items to your vehicle such as
driving lights stereo etc, think about putting in a separate fuse block
with sections for power with ignition on (through a 60 or 90 Amp relay) and
a second section for constant battery voltage. This will make future wiring
much easier and neater.
Cheers
Feral Errol
----------
From: Zac Campbell <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Thermo wiring
Date: Wednesday, October 25, 2000 4:03
List, how can I wire my thermo fan using a temp switch and relay? I would
like it to just go on and off automatically.
Sorry I have absolutely no idea what type of relay to use. I have some 6
amp wire here, is that suitable? And what temperature temp switch should I
get?! Where do I draw power from!!?? argh!
Thanks,
zac
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