Rheem Condenser with fluxuating pressures and temps.

[jarcrocker]

Just replaced an evap coil on an R-22 system. Had bad leak in an Aspen coil on a 5-6 year old system. It has an orifice on the coil. The day I installed it it was working well. Had a call out about a month later, upstairs not keeping up. Its a 2400sqft two story with 1-5 ton system. Suctions pressure was going up and down from about 60-75 ranging from 7-18 degree superheat. Couldn't read high side due to leaking high side hose on previous call. Checked indoor coil drop and was getting a fluxuating split of 14-18 degrees. Had a lot of temp loss in ducts from super hot attic. About 7 degrees. I plan to go back out there to get a couple more reading but was curious if anyone had some ideas what could be doing this.

Thanks.

Jr

[BaldLoonie]

When you changed the coil, did you recover old refrigerant or pump down & keep it? We found we were getting moisture in the systems when they were leaky and stopped trying to save the remaining gas. Starting all new stopped the expensive callbacks.

[small change]

Non-Condsensibles?

[jarcrocker]

We pumped the system down and topped it off after vacuum. We were pretty careful with the system before we changed the coil so I figured the refrigerant was ok. I guess not careful enough.

[Gunslinger]

When I have a leaker, I recover most of the gas and then use another recovery tank for the rest.This eliminates sucking in the atmosphere.

[BaldLoonie]

We would pump down the charge in the past but got stung too many times with situation like this. So from about 2 years ago on, recover all then all new gas .

[gravity]

hope you figure it out. but next time cant you use the low side or charging side hose and just screw it to the hi side?

[Danae12]

non-condensables..

bucking compound gauge.. need to recover the refrigerant and put new in... after you pump it down... Might wanna add a filter dryer as well.


Sorry bro...