With a R134a condensing unit on a freezer designed for R12. It isn't working right, customer keeps saying the ice is melting. (ice merchandiser outside a store)
What comes to mind? Aside from Stormy jumping off a bridge. Replace the gas with a R12 replacement blend?
Christopher A. Young Learn more about Jesus
Is there a TVX valve or is it a cap tube evaporator? o_O
TDD
Captube. These aren't grown up enough to be trusted with a TXV.
I remember from some where, the new stuff needs more flow to get the same cooling.
Christopher A. Young Learn more about Jesus
Is there a TVX valve or is it a cap tube evaporator? o_O
TDD
If it's a compressor rated for R134a, it should handle any R12 replacement. I use R416a in systems designed for R12 and it works better. ^_^
TDD
The condensing unit (contains a compressor) on the box is rated for
If it's a compressor rated for R134a, it should handle any R12 replacement. I use R416a in systems designed for R12 and it works better. ^_^
TDD
Mabee fix the insulation on the ice box?? Is the door weatherstripping gone?
The evaporator is not designed for 134a. If it had an expansion valve instead of a capillary tube metering system, it could be adjusted to use the 134a or it could be replaced with an expansion valve specifically designed for low temp 134a operation. I personally would change refrigerants to an R12 replacement that will operate at lower pressures than 134a. Of course, I have cut out cap tubes and installed a TVX valve in its place so a system could operate with a different refrigerant. ^_^
TDD
That's OK, I've never had a problem using mineral oil with R416a but I will definitely give R414 a look and perhaps a trial in a system. ^_^
TDD
Mabee fix the insulation on the ice box?? Is the door weatherstripping gone?
The evaporator is not designed for 134a. If it had an expansion valve instead of a capillary tube metering system, it could be adjusted to use the 134a or it could be replaced with an expansion valve specifically designed for low temp 134a operation. I personally would change refrigerants to an R12 replacement that will operate at lower pressures than 134a. Of course, I have cut out cap tubes and installed a TVX valve in its place so a system could operate with a different refrigerant. ^_^
TDD
I don't know what they are getting on ebay right now, but I just sold off 6 cans of r12 for $ 20 on Craigs list. I had them left over from when I had a car that used it about 20 years ago.
I did not really understand why someone would only change out part of the system and have it mismatched. Why not change it all out and have the problem solved even if it costs a lot more. I just hate the patch work things to get by and the problems they cause.
I'd have give you that, for the old cans. But, it's over now.
I don't know what they are getting on ebay right now, but I just sold off 6 cans of r12 for $ 20 on Craigs list. I had them left over from when I had a car that used it about 20 years ago.
I did not really understand why someone would only change out part of the system and have it mismatched. Why not change it all out and have the problem solved even if it costs a lot more. I just hate the patch work things to get by and the problems they cause.
Do you already have a can "tap"?
Here's but one auction with a Buy-It-Now kind of price:
Here's an auction:
Here's a 14 oz. can:
You should have taken it by a garage and I'll bet the owner would have given you a lot more money for it. I can guarantee you I would have given you as much as $20 per can. On a lot of of freezers, the evaporator is actually part of the case and there is no practical way to remove it. In something like a walk in freezer, the TVX can be changed out to match the new refrigerant and condensing unit being used. Quite often, the compressor can handle different refrigerants and if it is a semi-hermetic, it's very easy to drain the oil and replace it with an oil compatible with a different refrigerant. Been there, done that. ^_^
TDD
You have to consider the shipping and handling charge on any of those purchases. I've seen $100 shipping and handling charges on some items and you can't always be sure you're getting what you pay for. When I purchase something for a job where I have to guarantee my work, I must obtain my material from a reliable source, ie, a supply house. I can't go to a customer and say "I have to wait until it comes up for bid on eBay." A customer want's their equipment fixed NOW. ^_^
TDD
Many folks can't understand that the restaurant owner wants the equipment fixed NOW. He/she/it can't wait for something to come up for bid on eBay. I try to stock parts for specific customers but I'm not rich and can't afford to do a lot of that especially with all the medical problems I've had in the past decade. I have some customers that I obtained a jug of refrigerant for at cost because their old equipment would develop leaks due to age, rough usage by employees and vibration. If I was unable to get to them, (I was hospitalized when one called me) someone else could repair their stuff and the very expensive refrigerant would already be on site. A lot of small business owners is po just like me and struggling to survive, so we stick together. ^_^
TDD
Oh heck, I used R414b when it first came out then I later started using R416a and never went back to R414b. o_O
TDD
Many folks can't understand that the restaurant owner wants the equipment fixed NOW. He/she/it can't wait for something to come up for bid on eBay. I try to stock parts for specific customers but I'm not rich and can't afford to do a lot of that especially with all the medical problems I've had in the past decade. I have some customers that I obtained a jug of refrigerant for at cost because their old equipment would develop leaks due to age, rough usage by employees and vibration. If I was unable to get to them, (I was hospitalized when one called me) someone else could repair their stuff and the very expensive refrigerant would already be on site. A lot of small business owners is po just like
me and struggling to survive, so we stick together. ^_^
TDD
On a lot of of freezers, the evaporator is actually part of the case and there is no practical way to
remove it. In something like a walk in freezer, the TVX can be changed out to match the new refrigerant and condensing unit being used. Quite often, the compressor can handle different refrigerants and if it is a semi-hermetic, it's very easy to drain the oil and replace it with an oil compatible with a different refrigerant. Been there, done that. ^_^
TDD
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