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  1. Thread: YCAV

    by hvac1966
    Replies
    1
    Views
    715

    YCAV

    working on some york variable speed screw machines anyone with any service related issues on these machines !!!
  2. Replies
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    1,166

    high co readings

    Took a call on a small trane precedent roof top roll out switch was open and would not reset. Changed the roll out switch lit off the unit observe the flame ok , the low stage burned at high 02...
  3. Thread: too hot

    by hvac1966
    Replies
    9
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    733

    too hot

    I have a 208/230 volt rooftop when the mercury was jumping out of the thermometer at 104 deg, the measured voltage was 190 volts at the unit. I'm curios 208 230 +/- 10% acceptable lower than the 208...
  4. Replies
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    1,771

    ????

    I thought that as well your trying to displace oxygen also to reducing the oxidation scaling on the inside of the pipe.????
  5. Thread: Capacitor ?

    by hvac1966
    Replies
    33
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    1,824

    BLA BLA BLA BLA, PAY THE BILL MOVE ON , I CANNOT...

    BLA BLA BLA BLA, PAY THE BILL MOVE ON , I CANNOT BELEIVE PEOPLE WOULD WASTE THERE TIME ANSWERING THIS POST
  6. Replies
    2
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    492

    19xrv oil heater seal ring

    Any one change one of these looking for degree of difficulty, looks like you have to pull oil pump & cooler???????
  7. Replies
    15
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    1,482

    if it's a newer home check out chinese drywall !!!

    if it's a newer home check out chinese drywall !!!
  8. Thread: carrier 19xrv

    by hvac1966
    Replies
    3
    Views
    1,769

    carrier 19xrv

    Carrier centrifugal with pic 2 control, this one sounds relativly simple, doing the winter maint on this machine and noticed a phase reversal fault nothing had changed elecrically, reset and back...
  9. Thread: transformers

    by hvac1966
    Replies
    3
    Views
    749

    transformers

    Why do we groung the secondary of a control transformer( stepdown transformer). Any veiws on this would be appreciated .
  10. Replies
    21
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    1,412

    Thank you moose i hadn't heard of the strap on...

    Thank you moose i hadn't heard of the strap on heaters , had thought of doing that though. I do not now what the first stage reg is orificed for, that is the propane dealers reg . I am learning alot...
  11. Replies
    21
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    1,412

    The totel load is !million 6 hundred thousand ,...

    The totel load is !million 6 hundred thousand , the line size leaving the tank farm is inch and one hallf,Tha line size is oversized for the load.The pressure leaving the first stage reg is 10 psi...
  12. Replies
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    1,412

    Two ,thousand gallon tanks, the tanks are icing...

    Two ,thousand gallon tanks, the tanks are icing up I would think that might be somewhat normal as the propane is vaporizing. All the calculations that where done suggest that the first stage reg is...
  13. Replies
    21
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    1,412

    propane applications

    I have a job using propane to serve 4 rtu's and 4 unit heaters.New installation , the problem is the line pressure drops from 10 psi to 6 inches when i bring some load on. I have a first stage and...
  14. Replies
    18
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    2,498

    oversizing heating systems ???? never heard of...

    oversizing heating systems ???? never heard of that ...
  15. Replies
    18
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    2,498

    I have a two stage furnace in my home just...

    I have a two stage furnace in my home just installed beginning of fall. I have a single stage stat, amd allow the high stage to cycle based on time. I pulled out a lennox atmospheric burner at...
  16. Replies
    23
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    3,607

    Measure the air temp !!! is it too high ???...

    Measure the air temp !!! is it too high ??? Plugged ac coil, problem with zoning system, ductwork, Damper... Can you traverse the ductwork to check your airflow???? Is my gas pressure too high...
  17. Replies
    14
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    1,843

    Have you ever seen the damage that can occur to...

    Have you ever seen the damage that can occur to personal property and body, when boilers are not serviced by qualified proffesionals. Call a pro!!!! This is not blowing smoke, this is people actually...
  18. Replies
    17
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    2,379

    send it out for analysis, it sounds like you were...

    send it out for analysis, it sounds like you were the only person servicing it. Ive seen some synthetic oils used by people, royal purple i think was one.
  19. Replies
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    427

    high efficiency gas furnaces

    I just installed a two stage 95 percent efficiency furnace, in my house ,most of my work is on the commercial and industrial side. I am curious as to problems with acidic condensate disposal, do...
  20. Thread: carrier 19xrv

    by hvac1966
    Replies
    3
    Views
    822

    carrier 19xrv

    Have a 19xrv that has been off most of the summer . Went to start it and getting drive fault overcurrent? motor never attempted to start ? the drive is a reliance ref cooled drive. I cannot even...
  21. Replies
    17
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    1,393

    I would go with the 5 ton, and do your ductwork...

    I would go with the 5 ton, and do your ductwork necessary for the larger system, it sounds like the old system could not keep up, good luck
  22. Replies
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    5,210

    could be, and if it is that simple if you wher to...

    could be, and if it is that simple if you wher to have somebody proffesional look at it , would most likely be a simple fix
  23. Replies
    18
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    5,210

    16 stories i would have to assume you have a...

    16 stories i would have to assume you have a central chilled water plant in the building. So there also may be some type of ventilation air introduced also, wich could affect humidity lvels if not...
  24. Replies
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    1,541

    I would have a pro do the air balancing report...

    I would have a pro do the air balancing report for you, then continue with your troubleshooting. High suction could mean a few things, too much airflow, high return temps !!! , compressor efficiency...
  25. anyone come up up with any interesting ways to...

    anyone come up up with any interesting ways to disable the gps in your service vehicle ????
  26. Replies
    24
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    1,452

    Thera are so many variables when it comes to ac /...

    Thera are so many variables when it comes to ac / heat pump systems. I would be curious about why you would change euipment that is working. A system that runs continuosly on a hot and humid day is...
  27. Replies
    10
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    840

    What are your operating pressures, if there were...

    What are your operating pressures, if there were issues with contaminants in the system you could have plugged somthing up again, you can get perfformance data for the compressor you are using to...
  28. Replies
    40
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    9,422

    have the contractor show you the leak, cooling...

    have the contractor show you the leak, cooling coils can be repaired without being replaced sometimes. If for conversation sake the coil has leaked 3 years running, time to find out why!! Good luck.
  29. I have changed motors from 1 day to 20 years...

    I have changed motors from 1 day to 20 years maintanence is usually not the reason for failure , but it could be. What kind of motor protection do did you have and it it functioning properly. I am a...
  30. Replies
    14
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    2,071

    you need to dig deeper, is there multiple fans on...

    you need to dig deeper, is there multiple fans on the condensor? fan speed control ? your suction pressures are to low, do you have semis with unloading? What is your superheat doing it appears you...
  31. Replies
    35
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    2,361

    lot's of replies to this one! I don't think you...

    lot's of replies to this one! I don't think you could go wrong,either way unless They are the wrong size for 410a, volumetricly more efficient then r 22, can you flush properly to eliminate oil...
  32. Thread: Micron gauge

    by hvac1966
    Replies
    19
    Views
    3,089

    I use a robinair anolog micron gauge. It sounds...

    I use a robinair anolog micron gauge. It sounds like there is a leak, I install my gauge on the system by itself, if you yhink your gauges re leaking eliminate them from the equation or leak check...
  33. Replies
    12
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    954

    Thanks guys this unit is off line as we speak...

    Thanks guys this unit is off line as we speak until i remedy this problem, going back on monday !!
  34. Replies
    12
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    954

    Thank you, when i pull it apart again i will do...

    Thank you, when i pull it apart again i will do just that, it sounds like you have been down this road before. I appreciate the input!
  35. Replies
    12
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    954

    oil seperator losing prime

    I have a henry 1902 oil seperator changed the float assembly because it was pressurizing the compressor crankcase with discharge pressure. new float assembly prime the oil seperator, within 10...
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