Finding Out Tonnage from Compressor

[3DD]

Hi Guys,

Is it possible to find out the tonnage of the AC from the compressor?

[the dangling wrangler]

Yes, it is. Can you not use the info on the unit itself?

[Tech Rob]

Yes. Take the first two numbers in the model # and divide by 18 while touching your nose with the index finger of your left hand and saying "rubber baby buggy bumpers" as fast as you can.

Then call a qualified service organization.

[3DD]

Yes, it is. Can you not use the info on the unit itself?

The label on the unit is no longer there.

[3DD]

Yes. Take the first two numbers in the model # and divide by 18 while touching your nose with the index finger of your left hand and saying "rubber baby buggy bumpers" as fast as you can.

Then call a qualified service organization.

Unfortunately, the 2 A/C guys I tried couldn't find out the tonnage.

[RDP]

If the techs don't know they didn't try.If I can't tell I have plenty of phone #'s to different supply houses and dealers.

[jimj]

The BTU capacity of the compressor may or may not give you the nominal tonnage of the unit.

[the dangling wrangler]

Unfortunately, the 2 A/C guys I tried couldn't find out the tonnage.

OK, plan "B" would be to look for a model # on the evap coil.JimJ is correct but, you can get real close.

[beenthere]

Ok.

If the compressor is 22,500 BTUs. And the evap coil is 30,000 BTUs.

What size A/C is it?

[jimj]

[the dangling wrangler]

Ok.

If the compressor is 22,500 BTUs. And the evap coil is 30,000 BTUs.

What size A/C is it?

I don't give out that info for free.

[nickellhead]

I think I have it

22,500/ 18= 1250 tons is that right?

[beenthere]

LOL...

Dang, I was trying to get something for nothing.

[the dangling wrangler]

LOL...

Dang, I was trying to get something for nothing.

It was a good question. I guess the next step would be to measure the blower diameter, motor hp, and furnace/A-H rating, maybe take a look at the run cap rating. What would beenthere do in this predicament?

[jimj]

I was thinking that would make it a 13 SEER?

[beenthere]

I'd measure. But not any of the things you said.

[the dangling wrangler]

I was thinking that would make it a 13 SEER?

And, what tonnage would that 13 be??

[the dangling wrangler]

I'd measure. But not any of the things you said.

None? Been, I really don't care how or what you'd do here, so don't tell me. Deal?

[beenthere]

None?

Nope.

Its probably old enough, its time for a new unit. I'd go into salesman mode.

Which means I'd be measuring up the house, for a new system.

If I can't read the model number and blower rating of the furnace. Its time for a new furnace too.

Ok, Some people won't spring for a new furnace at the same time.
But I have never seen a furnace with a 2 ton blower. Minimum around here is 3 tons.
So I'd be safe that it has a 3 ton drive.

I might measure the blower, if I didn't reconize the brand.

ya got me.

[the dangling wrangler]

Nope

I knew that was coming.