R22 in a 410A heat pump

Big Will

I ran into this on a service call today. It looks like someone added R22 to a system that was low on 410A. The question is what to do about it. can  I just evacuate the system and add a new filter dryer? should I use the 410A flush?

CMadatMe

Completely Flush It

change the filter drier and re-charge. Not worth messing around.

Empire_2

Not good.

Reclaim whatever is left in the system, evac. to at least 500 microns, ad dryer and recharge.  Make sure there is no leaks, Because I wondering why R-22 was added in the first place.



Mike T.

Big Will

If I had to guess

Most manufacturers use a large pink sticker near the service valves that says 410A only. This one has a clear sticker with black writing on brown metal. 

Eugene Silberstein 3

Recover, recover, recover!

You will definitely want to recover the refrigerant mixture that is presently in the system, but be sure that you label the recovery tank accordingly so that nobody else uses that refrigerant in another system.

As was mentioned previously, you should carefully examine the system to find out why it was "short" in the first place.

Blowing out the lines is definitely not a bad idea and netither is replacing/adding suction line and liquid line driers.

jim lockard

R22 -V -410a

How did you figure out that R-22 had been introduced to the 410a system.?

I can see this becoming a ongoing problem,

Big Will

pressures were funky

Run the outdoor fan with no compressor for a while and do a pressure check. compare to a P.T. Chart. It looked like low on 410 at first glance.I just could not make it right. It was a head scracher for a while.

jim lockard

screwing up

If they were to change the threads on the 410a tank, the machine fittings and the gauge manifold set it would solve most of the problems. The only common connections being the recovery machine and the vacuum pump. Some creative mind could solve that as well.