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  1. Replies
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    Thanks much for the reply. A month ago I set the...

    Thanks much for the reply.
    A month ago I set the SC to EXACT spec of 6F (outdoor temp was 115F). Recently I had the installer come out to check the unit and the SC was 10F (using my Fluke meter...
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    1. The Lennox manual doesn't specify, but I would...

    1. The Lennox manual doesn't specify, but I would assume dry bulb when it says, "Outdoor Coil Entering Air Temperature"
    2. I put in the long line-set 15 or so years ago, in order to move the outdoor...
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    Had original installer come out to assess my...

    Had original installer come out to assess my concern. Everything checked out OK. They suggested that the lower pressure may be due to the longer run of 75 feet. The slightly higher SH taken at the...
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    Thanks for your help. Yes, the house is cooling...

    Thanks for your help. Yes, the house is cooling fine. Sorry that I forgot that superheat--- which was 27F (Y1 or Y2 mode). I wonder whether that SH is a bit high, as well.
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    low suction pressure lennox heat pump

    I have a Lennox 410A heat pump system, model XP19-036-230-01 (2-stage, 3 ton), with indoor unit CBX32MV-036-230-03 and Signature thermostat 81M28. The only problem I can find is a low suction...
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