Quote:
Originally Posted by FAKKY
Nova ......
Whats the advantage of the trinary switch setup, I mean I get it if just running 1 fan so you have seperate control for both AC and for engine temp.
Can you just run it with binary switch in the format of ...
1) AC and Condensor FAN come on anytime AC is turned on in CAB. Cuts out by pressure switch.
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A binary switch will just cut the power to the compressor if the head pressure gets too high, or too low. If you just use that and have the fan come on any time the A/C is on, the fan will run all the time. You don't want to hook the fan to the same wire as the compressor, because if you did that, when the head pressure got high enough to cut out the compressor, it would also cut the fan, the exact time you need it the most.
With a trinary switch, when the pressures are low enough, the fan will shut off, such as when moving down the highway. You will have sufficient air flow over the condenser at that time so fans won't be needed.