R134a compressor on R12 box

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

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Reply to
Stormin Mormon
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Is there a TVX valve or is it a cap tube evaporator? o_O

TDD

Reply to
The Daring Dufas

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

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Is there a TVX valve or is it a cap tube evaporator? o_O

TDD

Reply to
Stormin Mormon

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. ^_^

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TDD

Reply to
The Daring Dufas

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. ^_^

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TDD

Reply to
Stormin Mormon

Mabee fix the insulation on the ice box?? Is the door weatherstripping gone?

Reply to
clare

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

Reply to
The Daring Dufas

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

Reply to
Stormin Mormon

Mabee fix the insulation on the ice box?? Is the door weatherstripping gone?

Reply to
Stormin Mormon

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

Reply to
Stormin Mormon
Reply to
Stormin Mormon

Do you already have a can "tap"?

Here's but one auction with a Buy-It-Now kind of price:

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Here's an auction:

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Here's a 14 oz. can:

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Reply to
SRN

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

Reply to
The Daring Dufas

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

Reply to
The Daring Dufas

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

Reply to
Stormin Mormon

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

Reply to
Stormin Mormon

Witchie poo hollers "Help me, I'm melting!"

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

Reply to
Stormin Mormon

Thanks for the kind thought but I'm not doing as much work like that and now do more telecommunications work. Me and JH have a younger guy "Stinky Stink" who's 50 years old, I think, to help us out doing that stuff and he has years of experience. I just put together a power pole out of a 4" vinyl downspout for installation in a sales office at a car dealership. It will be installed in the middle of an office to carry power, telephone and network cables from the ceiling down to a number of desks for salespeople. I put two 4" square metal quad outlet boxes at the bottom to work as feet and a surface for Velcro to stick the bottom of the pole to the floor and small metal brackets will attach it to the metal ceiling grid. Since there will be five or more computers plugged in, I installed two separate 20 amp circuits using MC cable in the downspout. Each with a separate breaker back in the electrical room. I love MC cable, it makes a job a lot easier. ^_^

TDD

Reply to
The Daring Dufas

Well, in that case, you can send me all the refrig work? I'm back from the dead, this new Thunderbird is not keeping me content, compared to the old Outlook Express. Glad to hear you found a young fellow.

. Christ>> can't get out and about. Guess I still can, but it's not practical to

Reply to
Stormin Mormon

The Daring Dufas posted for all of us...

And I know how to SNIP

lower "head" pressure is a good thing? Injecting???

Oh boy you know how to talk my language. Heh heh

Reply to
Tekkie®

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