Heat Pump Problem

What is wrong with this heat pump??

Category:

Education

Tags:

• engineering

[carlby7]

Problem solved!!! We replaced the outside fixed orifice with a TXV. No more freeze up or drop in upflow temperature. Appreciate all the comments.

[67tr876]

Its low on r22 man.

[carlby7]

@67tr876

After further examination it was discovered that the inside coil was not a matching coil. It was explained that the coil was sized larger for more efficency. Unfortunately it also caused problems as far as refrigerant charge and some odd noises it would make at startup. Coil was exchanged and R22 was brought up to spec. and the system is now no longer freezing up at the accumualtor.

[kodiak410a]

Does this unit have a TXV a the condenser? I live in FL and I see this all the time during the "heating" season. The TXV power head can corrode and rupture. This can cause the txv to close completely and restrict the refrigerant flow back to the compressor.

[carlby7]

My condenser does not have a TXV it is a fixed orifice. I still think your theory could be correct as far as what is happening. Do you think it would help if the orifice was replaced with a TXV? We have opende the orifice up and there was not restriction, could the orifice be the wrong size or is this to be expected because of it.

[SNL0907]

I don't know what you want to accomplish by this. Are you a homeowner who wants to save a buck, so you'll ask this question over the internet, and pick (what you think) the best answer is and try to do it yourself.

Or an inexperienced tech who doesn't know what to do. Call a reliable service tech.

[carlby7]

@SNL0907

I was just looking for help because none of the techs that came out knew what was wrong.

[MrCraz6r]

Subcool and or superheat needs checked. if it is below 60F you can use the hot gas method to get the charge close or recover all the charge and weigh it in. The last two will get you close until it can be properly charged in AC mode when it is warm outside.

[newstart49]

It's not uncommon for Ruud/Rheem to ice up the first few minutes it starts up, but should clear up. Looks to me like a gross overcharge. There was no ice on the inlet to the accumulator. Wonder why? Liquid was boiling off in the accumulator.

[TheAudiience]

problem is its old as shit

[somerandomdude82]

If it freezes at the accumulator, then it is overcharged.

[jOJOEMAC571]

WAS IT FREEZING UP IN COOL OR HEAT MODE?

[1hvacdamian]

total waste of my time... what do your gages read???? if your indoor coil uses a fixed metering device, you must use the "super-heat" method to check the charge. having a slightly larger indoor coil(more surface area) can result in higher s.e.e.r. rating. if you use the larger orifice(usually the one supplied with the condenser.) YES to answer your question, a t.x.v. installed WOULD have corrected this problem. the t.x.v. "throttles" the refrigerant flow into the indoor coil(evap.)

[lswf123456]

I can tell by the way the compressor and all of the various parts are located outside the coil and how the coil is box shaped that it is a Rheem unit.

[jp221073]

When you install a bigger indoor unit their is a certain orphice that should be in the liquid line for matching the units.You can only go bigger on the indoor by 1 ton and never a bigger outdoor than indoor.When installed correctly a 1 ton increase in the indoor unit is suppose to change the seer rating but its not as efficient as first proclaimed.