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    Terrycloth's Avatar
    Terrycloth Posts: 16, Reputation: 1
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    #1

    Sep 3, 2012, 05:02 AM
    What should standing pressure be on a r22 ac unit
    What should standing pressure be on an r22 unit ?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Sep 3, 2012, 07:18 AM
    what should standing pressure be on an r22 unit ?

    That all depends upon how hot it is in the area surrounding the R-22 refrigerant. That is why a pressure temperature chart is used by HVAC mechanics.
    Terrycloth's Avatar
    Terrycloth Posts: 16, Reputation: 1
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    #3

    Sep 3, 2012, 10:35 AM
    Quote Originally Posted by hvac1000 View Post
    what should standing pressure be on an r22 unit ?

    That all depends upon how hot it is in the area surrounding the R-22 refrigerant. That is why a pressure temperature chart is used by HVAC mechanics.
    Another question when you turn the thermostat to call for cooling nothing comes on but when you switch it to fan the indoor fan comes on. I then jumped everything out at the thermostat and everything comes on. The pressures on the system were 30 degree coil temp and 160 on the high side which is low for sure. Could this be a faulty thermostat as well as being low on refrigerant ?
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