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  1. #14
    Join Date
    Jan 2012
    Location
    ohio
    Posts
    141
    did you ever check the super heat? or amp draw? does it have a head master or is it fan cycle delay?

  2. #15
    Join Date
    Jan 2012
    Location
    ohio
    Posts
    141
    or both

  3. #16
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Quote Originally Posted by markgarcia7uu View Post
    Sometimes it will flood the liquid line. Meaning that the condensor coil would act over sized. This happens when the restrictor piston gets stuck from bad seal or when it is over extended from "dead heading" this is caused from charging in the discharge line when breaking a vacuum.
    Interesting. Not what I was looking for. I suspect undercharge. Not enough liquid for system when ambient drops, at night, so little to no motor cooling. Comp trips on thermal, box temp continues to rise, thermal resets, comp over heats, trips on thermal, box temp continues to rise and so on. Any ambient above 75-80 the headmaster souls not be by passing. Unless system is undercharged or headmaster is malfunctioning like you pointed out.

  4. #17
    If headmaster is bypassing hot gas in the liquid line both and compressor be very hot. Under charge system get the head psi up. What freon??? R404 need 265psi . 175psi headmaster is open pumping hot gas it to the liquid line this will pump all the oil out of compressor due to very high supper heat. Sight glass is hot too and may only see oil flowing not freon. Easy test pump down on high valve watch sight glass empty's then reopen see it top off. Dead heading is a tee pipe. I charge system 25 yrs in liquid line after vacuum. This is not dead heading how ever told you this is a (D>A>)

  5. #18
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Quote Originally Posted by pyramidhvacr View Post
    If headmaster is bypassing hot gas in the liquid line both and compressor be very hot. Under charge system get the head psi up. What freon??? R404 need 265psi . 175psi headmaster is open pumping hot gas it to the liquid line this will pump all the oil out of compressor due to very high supper heat. Sight glass is hot too and may only see oil flowing not freon. Easy test pump down on high valve watch sight glass empty's then reopen see it top off. Dead heading is a tee pipe. I charge system 25 yrs in liquid line after vacuum. This is not dead heading how ever told you this is a (D>A&gt
    R22

  6. #19

    Under Charged or wrong TXV

    Quote Originally Posted by Tommy knocker View Post
    R22
    If coil is 9000 btu use a 3/4 hp txv if 1 hp ok but has to close down more. Never open more than 1/4 turn from closed to start. Charge system At 35/175 under charged or txv flooding. No high Psi 80 deg head (225) Did u clean cond. first??? (WATER) not co2. Is evap. coil clean??? / Never charge a system by low side meaning 35/40/45/ first get heap psi up If compressor can not pump heat in to the coil it never start to frost after txv. The 3/8 line on the txv need to be warm not hot due to the headmaster pumping hot gas in to the coil. Must start TXV close 1/8 -1/4 turn open . Never ck supper htg at coil only at compressor. Never colder then 25/30 degs. Now some scroll must run colder. Check Coil BTU next ck compressor if side at same btu at 25 deg coil.

  7. #20
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Quote Originally Posted by pyramidhvacr View Post
    If coil is 9000 btu use a 3/4 hp txv if 1 hp ok but has to close down more. Never open more than 1/4 turn from closed to start. Charge system At 35/175 under charged or txv flooding. No high Psi 80 deg head (225) Did u clean cond. first??? (WATER) not co2. Is evap. coil clean??? / Never charge a system by low side meaning 35/40/45/ first get heap psi up If compressor can not pump heat in to the coil it never start to frost after txv. The 3/8 line on the txv need to be warm not hot due to the headmaster pumping hot gas in to the coil. Must start TXV close 1/8 -1/4 turn open . Never ck supper htg at coil only at compressor. Never colder then 25/30 degs. Now some scroll must run colder. Check Coil BTU next ck compressor if side at same btu at 25 deg coil.
    ????????

  8. #21
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,625
    Quote Originally Posted by Tommy knocker View Post
    ????????

    Not enough question marks
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  9. #22
    Join Date
    Oct 2012
    Location
    CA
    Posts
    413
    On a unit like this what would you want to see for superheat anyway ?

  10. #23
    Join Date
    Jan 2006
    Location
    DFW Metroplex
    Posts
    4,910
    Quote Originally Posted by 54885488 View Post
    On a unit like this what would you want to see for superheat anyway ?
    Generally speaking, you're looking for 4F to 6F SH at the evap on low temp and 6F to 8F SH at the evap on medium temp. That said, one must always be cognizant of the SH reading at the pump.
    "The problem is the average person isnt tuned in to lifelong learning, or going to seminars and so forth. If the information is not on television, and its not in the movies they watch, and its not in the few books that they buy, they dont get it" - Jack Canfield

  11. #24
    Join Date
    Oct 2012
    Location
    CA
    Posts
    413
    How much higher are normal readings at the pump for medium and low temp systems ?

  12. #25
    Join Date
    Jan 2006
    Location
    DFW Metroplex
    Posts
    4,910
    Quote Originally Posted by 54885488 View Post
    How much higher are normal readings at the pump for medium and low temp systems ?

    SH at the pump is not application driven (it doesn't matter whether medium or low temp).

    To prevent the possibility of liquid floodback to the compressor, you never want to see the SH below 20F.

    Likewise, to prevent a pump from seeing an early grave by forcing it to operate outside of its design envelope, you never want to see the SH above 40F.

    So there's your range......between 20F and 40F at the pump.

  13. #26
    Join Date
    Oct 2012
    Location
    CA
    Posts
    413
    Quote Originally Posted by markettech View Post
    SH at the pump is not application driven (it doesn't matter whether medium or low temp).

    To prevent the possibility of liquid floodback to the compressor, you never want to see the SH below 20F.

    Likewise, to prevent a pump from seeing an early grave by forcing it to operate outside of its design envelope, you never want to see the SH above 40F.

    So there's your range......between 20F and 40F at the pump.
    Thank you markettech that clears up so much .

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