LaughaC

Help! Both R12 ports have the same threading on my Sanden 709 and I'm afraid I've attached a can to the high pressure side!

The port marked "S" seems like it should be the suction side, but the can became frosted over and the hose next to it seems to go to the front of the car.

The online manual is very unclear and indicates that some compressors can rotate either direction, which could mean the S and D ports would be reversed, right?

Can anybody out there confirm which port is suction on this thing? I'm afraid to touch the can since I've heard they can blow up if attached to the wrong side.

ron mcatee

I always look for the larger hose of the two. The smaller diameter one is usually the high pressure side and the larger one the suction or discharge side.

fixnprsh

+1

2.7RACER

If the can of refrigerant became frosted when connected to the compressor fitting, this would indicate the refrigerant was being sucked into the system.
The high (discharge) side of the compressor is always hot when running whereas the low (suction) side is cool or cold.