3 ton air coil with 2 ton unit

[raymond_anthony]

I had a thermopride gas forced air furnace installed last year. I had them add an air coil (13seer). Now I am looking to have the AC put in and one guy qouted me an american standard 13 seer unit (2 ton) with all the eletrical for $2300. Seemed reasonable. He said the air coil was a 3ton coil. With this cause problems with a 2 ton unit? I am clueless when it comes it HVAC. Thanks

Ray

[BaldLoonie]

The indoor coil should be what the outdoor unit manufacturer calls for. In some brands, that could be a 3 ton coil for a 2 ton unit. Today, you can't just go by the size indicator in the indoor coil. American-Standard requires an expansion valve indoor coil so they don't use bigger coils. So the correct coil for a A-S 2 ton would be the 024 coil. If your indoor coil is not a matching American-Standard coil, nobody can tell you how well it will work. If you want close to 13 SEER, it should have an expansion valve on it.

[beenthere]

Edit out the pricing, its not allowed herre.

I'd get the same brand condenser as indoor coil.

[matt_tech]

A lot of manufacturers mandate TXV evaporators on new 13+ SEER condensers, otherwise the warranty on compressor is voided.

[Mr Bill]

Originally posted by matt_tech
A lot of manufacturers mandate TXV evaporators on new 13+ SEER condensers, otherwise the warranty on compressor is voided.

And who are those? Do you know?

[matt_tech]

Juat had update class on Bryant last month. All warranties on condensers installed on systems with no txv automatically reverts to 1 yr. The instructor/rep said he would be surprised if they lasted that long. The oil will not feed properly, compressor will starve. I believe same goes for carrier.

[Mr Bill]

So who will be policing all these installs?

[matt_tech]

Don't know about you, but if I want credit on a warranty job, I have to turn in old comp. If unit is fairly new, I guarantee it is going to be cut open. Prob 1 of downsides of living near Bryant's main digs. Too many engineers for comfort. lol :]

[beenthere]

If they actually did that, that would be great.

But when's the last time you had a manufacturers rep come out and even look to see if its a matched system if you had a compressor go out in a year.

[beenthere]

Originally posted by matt_tech
Don't know about you, but if I want credit on a warranty job, I have to turn in old comp. If unit is fairly new, I guarantee it is going to be cut open. Prob 1 of downsides of living near Bryant's main digs. Too many engineers for comfort. lol :]

The first 18 monthes of compressor warranty are by the comp manufacturer.

[Mr Bill]

Originally posted by matt_tech
I have to turn in old comp. If unit is fairly new, I guarantee it is going to be cut open.

OMG!!
Yeppers you can bet this will happen.

[matt_tech]

beenthere- Do what you want. Live on the edge. Face death in the eye & ask him to dance. I can't afford to take chances, comp's are too expensive. Bryant/Carrier warranties are mostly 5 & 10 years p&l now. Our supplier is looking at old sales invoices to see if matching coils were sold. Comp's are going back to the factory for teardown. What more can I say?

[Mr Bill]

Originally posted by matt_tech
Our supplier is looking at old sales invoices to see if matching coils were sold. Comp's are going back to the factory for teardown. What more can I say?

So that would mean that they never sold any condenser without a matching coil? How do they stay in business?

[beenthere]

Originally posted by matt_tech
beenthere- Do what you want. Live on the edge. Face death in the eye & ask him to dance. I can't afford to take chances, comp's are too expensive. Bryant/Carrier warranties are mostly 5 & 10 years p&l now. Our supplier is looking at old sales invoices to see if matching coils were sold. Comp's are going back to the factory for teardown. What more can I say?

LOL...

I'm not telling you to mismatch, or install it wrong.

But if they were really serious, then you couldn't buy a condeser without buying the matching indoor coil/unit.
Or they would have you sign an afadavid that the existing indoor is a match, and you'd have to provide them the model and serial number to prove it.

[chigger]

Why can you not use a different sized piston (the plastic piece that you can easily burn when you are soldering in an outside unit)??? Why would this not work??? HELLO?