Re: Sanden compressor clutch and other things

Posted by Jim McDermaid On 2013/10/24 18:28:40

I have been blogging away on add-on A/c but I must have missed this thread.

I have a separate 12 volt system in my Packard Cavalier and the 12 V alternator can't keep the 12 volt battery charged in stop & go with the A/C on.

I was thinking of trying the Evap fan on 6 volts keeping in mind my 54 is positive ground. I would keep the Sanden clutch and thermostat control on the 12 volt system which would keep up without the fan.

One question is will the fan run the proper direction on Pos ground? I don't know if the fan motor on my system is internally grounded or I get both wires. If internally grounded maybe I could flip it end to end.

Getting this out is not going to be easy which is why I waited to cooler weather.

At the moment one relay controls the 12 volt system from the Ignition Switch.

My testing verifies the Sanden 12 volt clutch will NOT engage reliably on the 6 volt system.

Jim