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  1. #1
    Join Date
    Nov 2008
    Posts
    162

    Fixed Orifice or TXV When Charging.

    Which is the proper way to charge a Heat Pump when the condenser is a fixed orifice but there is a TXV at the evaporator. There is a chart for charging that looks like this.

    Name:  P1040263.jpg
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    So is the system being charged by super heat or sub cooling? Last pressures were 70 on the low side and 175 on the high side. Supply air is 61 degrees on a 75 degree day. Is this the best I will ever see?

    There is good air flow now at the return and supply. I just was hoping for a lower supply air temp.

  2. #2
    Join Date
    Oct 2006
    Location
    The Beach
    Posts
    717
    Get Your Pro Statis and we will help you.

    No DIY
    Blue Fox

  3. #3
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,069
    Good air flow at registers doesn't tell CFM.

    Even with a proper charge, temp delta can be poor if the air flow is too much.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

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