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Effects of change of R-22 to R-410A

Effects of change of R-22 to R-410A

(OP)
Hi folks,
Recently, I purchased an air conditioner with R-410A refrigerant, as generaly all manufacturing companies are replacing/phasing out R-22. The air conditioner is not working well its compressor gets tripped every three minytes. My technician tells me that the new gas(R-107A) requires different type of compression pressure and compressor which is more sensitive to voltage stability.The older air conditioners in my house are working well. My question is that whether the systems with R-107A are more load-sensitive in general or this is a design problem?

RE: Effects of change of R-22 to R-410A

When the condensing temperature is high the pressure of R410A increases higher and faster than R22.

What is the temperature of the air entering the condenser coil?

Your technician is seemingly poorly informed and making up things that sound technical in an attempt to hide his lack of knowledge.

RE: Effects of change of R-22 to R-410A

You purchased a new air conditioner, was the cooling coil and piping replaced too? While R-410a is the new refrigerant, it will not work on equipment designed for R-22.

RE: Effects of change of R-22 to R-410A

The unit should work because it would be designed for the refrigerant used. Have it fixed under warranty. Go above the service man. Talk to his supervisor to get the unit checked out. Most probably it would be an installation problem. The refrigerant lines could be blocked or the unit is overcharged with refrigerant and the compressor is pumping liquid instead of compressing gas.

RE: Effects of change of R-22 to R-410A

Is this a window unit? Is the breaker tripping? 15 or 20 Amp? What's the unit draw? The tech doesn't sound like an expert, but the problem may not be with the AC unit. If it is the AC, get the company owner in front of it and don't let him send the same tech.

RE: Effects of change of R-22 to R-410A

A couple of things to check, one the Voltage and size of wires to the unit. The new unit may be larger than the old one. Excess current draw may induce a voltage drop that does not allow the compressor to get out of the start circuit. If that is the case the compressor will trip out after 2 to 3 minutes of trying to start. Two the state of charge on the unit. If the technician overcharged the unit on the initial installation, then you could have excessive head pressure on the unit causing a trip out.
As lilliput1 says go see the mans supervisor. If this is a new unit the company should make it right.
B.E.

You are judged not by what you know, but by what you can do.

RE: Effects of change of R-22 to R-410A

I'm sure it is just a typo, but you listed R-107A in your post. I hope you didn't mean R-407C. Regardless, what exactly was replaced? Just the condensing unit outside, or the indoor coil, expansion device, and piping as well? Oils are not compatible from R-22 to R-410A, so everything should have been flushed at minimum or better yet replaced.

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