Charging an all new R12 system

Hi Brian,
This should have all the info your looking for.

Doug M



http://augerresources.com/wiki...and_Air_Conditioning

Thank you Doug! What a helpful site- I'm trying to find the high pressure switch it recommended I install.
Cheers,
Brian

www.nostalgicairparts.com/ has everything you need cheap.

They have either the binary or trinary switches.

The binary switch wires in series with the compressor relay pilot circuit and won't let the compressor engage unless there is enough pressure in the system to operate and will also disengage the compressor if the high side system pressure gets too high.

The trinary switch does everything the binary switch does and will also control your condenser fan too. A second pair of wires gets wired in series with the condenser fan relay and only engages the condenser fan when high side system pressure determines it needs to run.

Not such a bad idea when you consider how much power the A/C system uses.

One thing to note, while that is a great site and a wealth of VERY valuable information, use the charge and volume information as a reference point. You have changed your hoses, condenser and evaporator coil, drier and compressor from stock. The odds that your system holds any of the weights listed are pretty nil, close maybe as a starting point.

As a start, your compressor should list the type and volume it came with for its oil charge.

Have fun,
Angelo

Here is another thread that maybe useful once you hook up the gauges and start charging the system.

http://pantera.infopop.cc/eve/...951042826#7951042826