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  1. Replies
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    mismatched coils

    I have a customer who sent me a text tonight - he said that he replaced his three ton condenser with a 4 ton (I assume he still has a 3 ton air handler) - he was told he would have colder air. He...
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    Ok. Are you saying that the reason some...

    Ok. Are you saying that the reason some compressors have horsepower ratings rather than BTU (tonnage) ratings is because one compressor, say CRN-5 can have different BTU ratings - depending on the...
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    Horsepower / BTU's

    I don't understand why some compressors are rated in tons/BTU's and others (freezers, coolers, etc) are rated in horsepower.
    Is there a difference in the compressors themselves?
  4. Thread: insulation

    by tonydykes55
    Replies
    2
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    231

    insulation

    I'm relocating some supply ducts - they are between studs - in the wall cavity. Since they will be encased between studs and sheetrock, will they need insulation. The ones I'm replacing did not have...
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    heil quaker

    Can anyone help me determine the size of this unit.
    I think it's a 2 ton. The house is 1000 sq.ft.
    Heil Quaker condenser model CU325AOD1C.
    Compressor nameplate - model SRC4-0020-??
  6. Thread: pump down

    by tonydykes55
    Replies
    19
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    773

    thanks, this has been very educational.

    thanks, this has been very educational.
  7. Thread: pump down

    by tonydykes55
    Replies
    19
    Views
    773

    I understand. So then, in an typical residential...

    I understand. So then, in an typical residential split system for example, would I be correct in thinking that since the indoor ambient is typically 68 -74 degress, for example, there is not as much...
  8. Thread: pump down

    by tonydykes55
    Replies
    19
    Views
    773

    I see. When you say "flood back from the...

    I see. When you say "flood back from the evaporator", are you saying that without a LL solenoid, in the off cycle, as a system equalizes, liquid from the condenser migrates to the evap? And then...
  9. Thread: pump down

    by tonydykes55
    Replies
    19
    Views
    773

    pump down

    Why does freezers use a LL solenoid / pump down to kill the compressor
    via a low pressure switch rather than simply put the t-stat in series with the coil ?
    I know there is a logical reason.
  10. Replies
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    freezer vs cooler controls

    What specifically is different in a freezer and cooler controls?
    Is it mostly in the charge / pressures?
    Defrost circuit?
    TXV?
  11. Replies
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    People are fanning themselves, because they are...

    People are fanning themselves, because they are hot in the summer months.

    Since there are many live performances, there is a heavy lighting load on the stage - Many lights. Some vendors
    bring...
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    I will have to measure return grates, they are...

    I will have to measure return grates, they are appx. 2 1/2 to 3 ft. wide X 3 1/2 to 4 ft. tall. (not sure ???)
    Could be 2' X 3' ??? I will let you know.
    I don't think there is any make up air....
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    467

    This theater has shows via a pull down screen....

    This theater has shows via a pull down screen. However it has a large stage - mostly live performances. No supply air on the stage. Maybe he (the owner) made a mistake by blocking off the high...
  14. Replies
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    467

    Supplemental Heat in Theater

    I have a customer who owns a very old theater with 2 - 30 ton rooftops. Old units. Historic building.
    Massive return air plenums - Air Handlers in the attic - one on each side of the stage....
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    3,904

    I know this thread is long overdue. I have not...

    I know this thread is long overdue. I have not been back on this site for a few months. I was to the point of evacuating, changing the txv, and weighing in a new charge -
    as a last ditch effort....
  16. Replies
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    I have not solved the problem yet. I have been...

    I have not solved the problem yet. I have been overloaded with work. Temp is holding at 20. I went back Friday morning and adjusted the charge. The suction was 46. I managed to get it down to 36 and...
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    I found a schematic. Very old I managed to piece...

    I found a schematic. Very old I managed to piece it together and make a copy. It's pretty legible, but it does not show
    the LL solenoid or indoor stat. I've seen some that have the indoor stat...
  18. Replies
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    walk in freezer controls

    I am still learning about the controls on walk in freezers and coolers. I'm servicing one that is very old.
    the evap sometimes freezes. I have been in my school books trying to understand the...
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    Lowes doesn't sell without install. Population...

    Lowes doesn't sell without install. Population about 50K +. I'm researching this. Never heard of ducane or lennex. I will check it out. That's Lennex, not Lennox?
  20. Replies
    10
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    783

    Monopolies on name Brands

    We have a local Service Company/Dealer. They sell & install Trane units. Of course they service all brands since they are a "Service Company". They do not sell to anyone but their customers/clients....
  21. Replies
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    correction, I meant "open the valves" not the...

    correction, I meant "open the valves" not the gages
  22. Replies
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    If it's very slow and hard to find, I pressurize...

    If it's very slow and hard to find, I pressurize both coils and then close both valves. When I come back I can tell if the evap has a leak. then I open valves and pressure will either drop or rise,...
  23. Replies
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    tank has a valve on the bottom and when I...

    tank has a valve on the bottom and when I depressed it - nothing - no water, no air.
  24. Replies
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    I see. simple enough. I am headed out to check it...

    I see. simple enough. I am headed out to check it out. ill repost later
  25. Replies
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    exactly what is the purpose of the expansion tank

    exactly what is the purpose of the expansion tank
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