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  1. joeywpittman

    ammonia refrigerant

    has anyone here ever worked with ammonia as a refrigerant? what training is needed? where do you get the training? where do you purchase ammonia equipment and refrigerant? How much more efficient is ammonia over R-22?
  2. joeywpittman

    Humidity Question for make up air

    What should the discharge air be on a make up air handler unit in the summer (cooling) mode of operation? The make up air unit has 2 stages of DX cooling and a hot water reheat coil with a three way modulating valve. I want the coldest discharge temp so not to load the existing mech cooling...
  3. joeywpittman

    Making a simple generator

    question??? i have a 1075rpm 240v 2hp electic motor. If I connect it's shaft to a 10hp gas engine. Will it product 240volts while the gas engine is spinning at 1075rpms??
  4. joeywpittman

    [b]Discharge Superheat[/b]

    Discharge Superheat is a subject i would like to know alot more about. I know it is the Discharge temperature minus the condensing saturated temperature. Example: Discharge temp. = 142* Condensing Sat. temp. = 91* so the discharge superheat would be = 51*. i was told that you should only...
  5. joeywpittman

    what would cause a screw compressor to scrap the housing

    I am relaying a question? A screw compressor is scraping the housing at letters A,R,Q. What do you think the problem is? (¿¿¿Bad thrust bearings MAYBE???)
  6. joeywpittman

    vibration analysis on semi-hermetic compressor

    i'm working on a trane compressor m# CRHR600C-7RA0 s# J08031266AR which was installed about 6-months ago. it is making a unusual noise (sound like metal on metal) the compressor has a one-year warranty from the rebuild company. i want to try to get it replaced while it is still under warranty...
  7. joeywpittman

    vibration analysis on semi-hermetic compressor

    i'm working on a trane compressor m# CRHR600C-7RA0 s# J08031266AR which was installed about 6-months ago. it is making a unusual noise (sound like metal on metal) the compressor has a one-year warranty from the rebuild company. i want to try to get it replaced while it is still under warranty...
  8. joeywpittman

    helium pressure-temp. chart

    previously i asked about hydrogen when i should have wrote helium. i'm looking for a pressure-temp chart for helium in PSIG and deg. F..or any other form.
  9. joeywpittman

    oil return from suction accumulator

    if i were to install a suction line accumulator in an R22 refrigeration system right before the compressor. for the propose of preventing any liquid refrigerant from getting back to the compressor. how does the oil get back to the compressor with out the liquid getting back.
  10. joeywpittman

    R22 price increase

    trying to find a chart on the predicted R22 prices. does anyone know how much r22 will sale for in 10 years
  11. joeywpittman

    pressure-temp chart for hydrogen in PSIG and deg. F

    i am looking for a pressure-temp chart for hydrogen in PSIG and deg. F i am trying to condense hydrogen into a liquid by compressing it to xxxx psi and then cooling it xxxx degrees. but i would like a chart in imperial conversions.
  12. joeywpittman

    problems with a 230ton york air cooled screw

    I’m having problems with a YORK 230 ton air cooled screw machine. M/N:YCAS0230EC46YFASB Year:97 Roughly, for the past year, once every three months, it trips out ckt#2 with this fault message: “High DSCH Temp”. Now it is appearing more frequently. According to troubleshooting guide in the...

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