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Type: Posts; User: codgy

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  1. Replies
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    537

    Damn, that sounds like the beginning of a...

    Damn, that sounds like the beginning of a terrible week.
  2. Replies
    52
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    4,098

    1955 copeland semi 1/2 hp in an ice cream box r...

    1955 copeland semi 1/2 hp in an ice cream box r 12, still running today.
  3. Replies
    21
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    1,361

    Sounds like a glycol coil?

    Sounds like a glycol coil?
  4. Thread: Venting

    by codgy
    Replies
    25
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    3,775

    Great gas lines, 2 lb system? Venting a real life...

    Great gas lines, 2 lb system? Venting a real life safety issue. I could not sleep if I left this.
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    845

    Looks great with the space you had.

    Looks great with the space you had.
  6. Replies
    4
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    391

    Might try aircraft cable to quickly make a safety...

    Might try aircraft cable to quickly make a safety cable to prevent severe damage.
  7. Replies
    4
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    391

    Do they break at the weld to motor body or the...

    Do they break at the weld to motor body or the actual mount plate? Look for missing weights on blades possible balance issues.
  8. Replies
    6
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    856

    Drill them out and use a brass bolt with ring...

    Drill them out and use a brass bolt with ring terminal like they should have done at factory.
  9. Replies
    2
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    388

    R407c works great and is super cheap

    R407c works great and is super cheap
  10. Replies
    17
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    1,400

    Mig it, it works. This is a serious design flaw...

    Mig it, it works. This is a serious design flaw by Bristol and if you order a replacement it will likely be a danfoss. Mig or silver solder will repair it but the problem will recur due to the bad...
  11. Replies
    27
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    1,655

    I would try tightening them first. Should just...

    I would try tightening them first. Should just take 30 min. To find out if more is needed. I have fixed several like this without issue. What rebuilder?
  12. Thread: Leak detector

    by codgy
    Replies
    34
    Views
    3,013

    Tif zx1 although any heated pentode detector...

    Tif zx1 although any heated pentode detector should be fine.
  13. Sizing for heating load is the correct way. It...

    Sizing for heating load is the correct way. It should be fine if sized properly.
  14. Thread: KT43PC

    by codgy
    Replies
    2
    Views
    368

    Should be fine, maybe a small superheat adj. is...

    Should be fine, maybe a small superheat adj. is all if even that.
  15. Thread: Drop leg pipping

    by codgy
    Replies
    10
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    1,255

    That type of install should not cause any issues.

    That type of install should not cause any issues.
  16. Thread: Drop leg pipping

    by codgy
    Replies
    10
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    1,255

    Prefer no rise in drop leg if possible to allow...

    Prefer no rise in drop leg if possible to allow free draining of condenser.
  17. Thread: Hot gas bypass

    by codgy
    Replies
    10
    Views
    1,298

    You can pipe it at condenser,but you should use a...

    You can pipe it at condenser,but you should use a desuperheating txv also piped in before compressor. It works great, have done this many times. Remember you need a solenoid also if pump down...
  18. Read manual no solenoid needed

    Read manual no solenoid needed
  19. Thread: Thermal imager

    by codgy
    Replies
    1
    Views
    464

    Thermal imager

    I finally bit the bullet and purchased a thermal imager fluke ti55. I had 2 different meter bases and a disconnect burn up last week and would like to catch these issues before a problem occurs. Any...
  20. Replies
    2
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    428

    Sounds like cap tubes undersized? 3 lb sounds...

    Sounds like cap tubes undersized? 3 lb sounds like about 3/4 lb overcharge.
  21. Replies
    15
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    1,213

    I think that the command to off must be constant,...

    I think that the command to off must be constant, are you using dry contacts or electronic relays that might be bleeding through.
  22. Replies
    8
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    993

    Possible to use old evap w txv change and...

    Possible to use old evap w txv change and conversion to air defrost if evap is large enough btu wise. Add 15 percent to rated capacity and go from there. Good idea to change cond. as normally low...
  23. Sounds like external equalizer line flooding thru...

    Sounds like external equalizer line flooding thru the bad txv.
  24. Replies
    7
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    473

    The white Rogers has some time delay and...

    The white Rogers has some time delay and indicator light functions as well as security limits to prevent users from switching to heat etc.. All around a good control.
  25. Replies
    7
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    843

    Is this for beer/wine distribution center? ...

    Is this for beer/wine distribution center? Electric or propane forklifts?
  26. Replies
    4
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    589

    Did not know they were still using that crap.

    Did not know they were still using that crap.
  27. Use a ranco f25-107 and don't skip fan delay as...

    Use a ranco f25-107 and don't skip fan delay as it needs this to reset terminator for next defrost.
  28. Replies
    10
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    863

    Trash in valve seat?

    Trash in valve seat?
  29. Replies
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    617

    Yes

    Yes
  30. Replies
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    3,306

    I made a lot of permanent repairs on trane...

    I made a lot of permanent repairs on trane rooftops in the early 90's w/ aluminum solder and flux. I believe Harris made the kit. Do not see why these coils would be any harder to repair, 2 or 3" vac...
  31. Replies
    18
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    1,245

    I think you are referring to the high low med...

    I think you are referring to the high low med back pressure ratings for starting torque on compressor motors. Low generally has time to equalize pressure from high to low before it will start. Med...
  32. Replies
    28
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    1,766

    Open cooler are generally designed to be in a...

    Open cooler are generally designed to be in a conditioned area no hotter than 78. At he ambient s you have condenser is undersized as well as compressor.
  33. Replies
    4
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    577

    Water cooled heads are quite common on these, and...

    Water cooled heads are quite common on these, and needed with that operating envelope. Use a glycol pump and fan coil to reject heat if no cooling tower water is available. Most of my systems...
  34. Replies
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    579

    I would upgrade customer to two stage operation...

    I would upgrade customer to two stage operation w/ extra lineset, if cond is below evap might leave existing in service w/ new. Finding a single stage 20 hp is going to be difficult anyway.
  35. With duct size answers like this who do you get...

    With duct size answers like this who do you get approved to reply to AOP questions?
  36. I would not worry about the liquid line w/ that...

    I would not worry about the liquid line w/ that much static head i doubt if it would ever have any pressure drop. The riser I would have installed with 3 lifts and 7/8 inch line if 410a. May have a...
  37. Thread: Walk-ins

    by codgy
    Replies
    3
    Views
    386

    check capacitors and feel for bearing play,...

    check capacitors and feel for bearing play, tightness etc. tach should not be needed as speed is fixed by windings. I find a lot of sleeve bearing motors installed by others that fail usually within...
  38. Replies
    16
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    807

    Your issue is from the damper, that's why opening...

    Your issue is from the damper, that's why opening it helped. S duct would also cure it, existing duct size is correct.
  39. Opt for a p66 variable fan control during low...

    Opt for a p66 variable fan control during low ambient, and definitely suction cutoff. Or if its truly undersized skip the unload. Doe this unit have y2 without an unloader ?
  40. Replies
    19
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    1,445

    Have you checked c rating of motor? Remember...

    Have you checked c rating of motor? Remember supply houses generally carry the least expensive replacement, sleeve bearing or worse motor so they can sell another motor in 2 or 3 years.
  41. Replies
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    4,191

    I believe that 407c would result in better flow...

    I believe that 407c would result in better flow rates and lower superheat in this application.
  42. Replies
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    738

    no way, thats to keep the hot air from blowing on...

    no way, thats to keep the hot air from blowing on their legs.
  43. Thread: Truck stock

    by codgy
    Replies
    10
    Views
    1,149

    ao smith 9721 evap motor is great. 8145-20 and...

    ao smith 9721 evap motor is great. 8145-20 and 8145-10 not worth the price diff for the 8045 version.
  44. Suction is low at that entering air temp. Have...

    Suction is low at that entering air temp. Have you checked evap coil cleanliness? TXV screen? I would set 2nd stage pump to cycle off at 65 psi on at 83 psi. Maybe icing coil and w/o out at least a...
  45. Do you have a formula to calculate the capacity...

    Do you have a formula to calculate the capacity of a 410a compressor used on 22 or 407c? It would seem as though a unit would need to be de-rated 35 to 40% if used w/ 22, this seems like a huge diff....
  46. Replies
    13
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    1,390

    check voltage at the panel, you may have low...

    check voltage at the panel, you may have low incoming voltage or to much drop in the long run to the unit. Remember when its the hottest this problem is worse.
  47. Replies
    19
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    1,445

    Sounds like you need a higher amp rated motor,...

    Sounds like you need a higher amp rated motor, sometimes you go with a higher hp to match amp draw of spec. motor.
  48. Replies
    19
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    1,445

    original motor spec may have been for 60C motor...

    original motor spec may have been for 60C motor for condenser applications. Verify clean coil. some 3/4 motors have lower amp rating than others. also is rpm correct?
  49. Replies
    2
    Views
    780

    Mushrooms generally use low td evaps w/ low...

    Mushrooms generally use low td evaps w/ low velocity airflow and spray fog humidifiers. Very high humidity is needed and condensation issues will show up during winter operation. A real refrigeration...
  50. Replies
    11
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    668

    If 134a maybe plugged tube? No oil in compressor,...

    If 134a maybe plugged tube? No oil in compressor, logging in evap? Factory cap tube/ receiver is not unheard of but rare. Verify condenser is spotless, maybe not enough off time to equalize. Check...
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