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Thread: New A/C

  1. #1
    Join Date
    Jun 2005
    Posts
    3
    Had a new A/C put in. The tech put in a 3 1/2 ton but my coil is a 3 ton. He was going to put a new piston in but the store was closed. will this unit operate ok with a 3 ton piston in the coil for the night????

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,601
    Got a brand & model # for in & out? Smaller A coils reduce capacity a bit though help dehumidification. Reduce SEER a bit too. Probably not an approved match but the model #s will tell us.

  3. #3
    Join Date
    Jun 2005
    Posts
    3
    Here is what I found out, the piston size in the coil is .073 and it calss for a .078... Getting those numbers now... Thanks for the reply!!

  4. #4
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    16,121
    I know this might be a stupid question but why didn't he just install a 4 ton evap. and then change the piston to the 78 are you in a humid area? with an A coil you really need the bigger surface area of course unless your in a very humid area maybe that's just my opinion.
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  5. #5
    Join Date
    Jun 2005
    Posts
    3
    Coil was already installed. The make of the coil is ADP and the A/C is Ducane Mod# AC10B42.

  6. #6
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,777
    Did you have your furnace replaced and they installed a new coil at the same time.

    And another company just installed a new outdoor unit without checking what the indoor coil is, let alone what size your house needs.
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    How many times must one fix something before it is fixed?

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