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4 ton coil for 5 ton unit

Posted by iggie (My Page) on
Mon, Jun 18, 12 at 22:08

Today at the local coffee stop for local HVAC techs quite a discussion was going on. The group was discussing a job just completed by one of the group. He had installed a 5 ton used Trane unit customer had bought someplace to replace a 4 ton Goodman unit where compressor had thrown craps. He stated setup would work fine as he had thoroughly flushed system, charged the systen to proper level for the 4 ton coil said unit was cooling fine and drawing a bit lower than rated amps. Most disagreed with him and told him setup will only cause trouble in the future. I tend to agree, however stayed out of the discussion. Would like to hear what some of you experts think about this. Just curious, Iggie

Follow-Up Postings:

RE: 4 ton coil for 5 ton unit


I would like more details.

You do see 4 ton coils as an AHRI match on a 5 ton condenser. Usually though this is not the best match. Customer should get better dehumidification only if sized correctly.

I think first it would be nice to know that both Trane condenser and coil are a match. But probably more important will customer have short cycling by going up in size if his cooling load did not call for it.

Usually jobs like this do not have a happy ending.


RE: 4 ton coil for 5 ton unit

Cheapness and ac don't mix very well.

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