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  1. #1
    Join Date
    Nov 2008
    Posts
    162
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    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.

    Attachment 46322

    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
    886
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    Get Your Pro Statis and we will help you.

    No DIY
    Blue Fox

  3. #3
    Join Date
    Jan 2004
    Location
    PA
    Posts
    72,436
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    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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