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  1. Replies
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    Suction gas cooled motor. What is the suction &...

    Suction gas cooled motor. What is the suction & discharge superheat? Motor rla & operating amps?
  2. At full load the sight glass should never be over...

    At full load the sight glass should never be over 1/2 glass, typically when charged per engineering recommendations you will not see a level in the sight glass at any load.

    Evap approach...
  3. Replies
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    sent email

    sent email
  4. Replies
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    207

    Model number? WMC has been out since ~2000 with...

    Model number?
    WMC has been out since ~2000 with Turbocor 2 stage compressors
    WME since ~2012 with Daikin single stage
  5. Replies
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    Each soap solution reacts differently also. Some...

    Each soap solution reacts differently also. Some indicate better on small leaks some better on large leaks.
  6. Replies
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    465

    You stated the fan bearings & belt had just been...

    You stated the fan bearings & belt had just been replaced. How do you know the pulleys were not replaced also?
  7. Replies
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    465

    If adjusted to max tension with shorter belt, may...

    If adjusted to max tension with shorter belt, may have wrong pulley(s)
  8. Replies
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    637

    In some places the utility company can make...

    In some places the utility company can make recommendations or review. Several states also require load calculations for permit.
  9. Replies
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    465

    Wd-40 is not a belt dressing. Either tension...

    Wd-40 is not a belt dressing.
    Either tension wrong, wrong belt, wrong pulley(s), worn belt, or worn pulley(s).
    Bolt for tension adjustment, full out indicates probable wrong belt or pulley(s)
  10. Replies
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    637

    What they said. Also how open is the upstairs to...

    What they said. Also how open is the upstairs to down. Load calculation may need to account for heat rise from lower floor.
    Bonus room may need return or return path.
  11. Replies
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    337

    Usually used with flooded head pressure control. ...

    Usually used with flooded head pressure control. Subcooler circuit or ll heat exchanger after receiver.
  12. Replies
    18
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    337

    Not sure why you would need a receiver?...

    Not sure why you would need a receiver?
    Refrigerant condition in a receiver is saturated, would need subcooled refrigerant to feed txv….
    Condenser should have subcooling circuit or dedicated...
  13. Replies
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    337

    Type of compressor & unloading? Subcooling...

    Type of compressor & unloading?

    Subcooling should slightly increase as loads increases .

    Valve power head could be losing charge ,noncondensables false subcooling, or liquid line pressure...
  14. Could be compressor starting with vanes full...

    Could be compressor starting with vanes full open, check indicator.
    Could be inverted starts, but compressor should not load.
  15. Replies
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    673

    What kind of base frame is that attached to the...

    What kind of base frame is that attached to the wall?

    Cotton wood fouling?
  16. 2x water cooled, glycol, remote evaporative...

    2x water cooled, glycol, remote evaporative cooled tower. Fairly long term payback on direct cost. Payback on loss of cooling effects?
  17. Read the pdf specs. Multiple compressors per...

    Read the pdf specs. Multiple compressors per circuit. Limits operating number of compressors & inverter output.
  18. Usually used for startup & hot pulldown. Allows...

    Usually used for startup & hot pulldown. Allows one compressor to run on each circuit fully loaded with oversize condenser until water temp is lowered , as it is pulled down all compressors are...
  19. Replies
    41
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    2,192

    What 2x?

    What 2x?
  20. Replies
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    294

    Bleed the pressure off.

    Bleed the pressure off.
  21. Replies
    41
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    2,192

    Negative. Limit nitrogen flow to the minimum to...

    Negative. Limit nitrogen flow to the minimum to prevent air entry. The line should not be under a measurable gauge pressure, restrict pipe ends so there is only a slight flow. If not capped on...
  22. Assumes microprocessor and software...

    Assumes microprocessor and software compatibility. Model # not listed.

    Sporlan only requires digital enable & pumpdown signal. Easy setup, low relative cost. No software updates needed.
  23. Sporlan sells the controller and valve. Will...

    Sporlan sells the controller and valve. Will need a power supply.
  24. Replies
    48
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    1,446

    Locktite makes a cleaner and two primers. Don’t...

    Locktite makes a cleaner and two primers. Don’t use the fast cure primer, the slower cure works great. With fast cure if you stop to get another bite with the wrench it’s already hardened.
  25. I have a couple. Used to use on industrial jobs...

    I have a couple. Used to use on industrial jobs quite a bit. Would suck water into the tip every couple of years and smoke one.
  26. Replies
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    Was a load calculation done? House sq ‘? What is...

    Was a load calculation done? House sq ‘? What is the oa temp? Duct and attic insulated? Air temps even though out the house?
    Dt’s appear typical.
  27. Is that his name? Met a guy from India, name on...

    Is that his name?
    Met a guy from India, name on his business card was “Dik Shit”.
  28. Original was GE. Assume their patent expired.

    Original was GE. Assume their patent expired.
  29. Replies
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    Page 11, Rigid “System Safe” dye, for systems...

    Page 11, Rigid “System Safe” dye, for systems with Copeland compressors.
  30. Replies
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    378

    Pumpdown the compressor and monitor the pressure....

    Pumpdown the compressor and monitor the pressure. If it has compressor suction & discharge service valves use them to verify discharge check valve and liquid line solenoid/exv are seating.
  31. Thread: GPM

    by ehsx
    Replies
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    289

    Majority of older systems were at ashrae...

    Majority of older systems were at ashrae standard. You need the equipment design data as sold, sales rep, or equip mfg can supply if the customer does not have on hand.

    Ashrae:
    2.4 gpm/ tn...
  32. Replies
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    378

    Refrigerant can migrate due to temp difference if...

    Refrigerant can migrate due to temp difference if the evap sat is lower than the condenser or pressure difference if there is any path not sealing. That would include the ecomizer solenoid.
  33. Replies
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    Must not be proud of it, did not see it mentioned...

    Must not be proud of it, did not see it mentioned in the lit. They did list an approved leak detection additive, first time I’ve seen a major mfg list that.
  34. Replies
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    Never seen micro-channel with...

    Never seen micro-channel with receiver/headmaster. Vfd only.
  35. Replies
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    465

    Should not even contact insulation. Since just...

    Should not even contact insulation.
    Since just replaced, check runout & balance/ vibration with panel off.

    If the noise was not there before bearings were replaced, anything else changed?
  36. Replies
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    Looks like the fan shaft is in contact with the...

    Looks like the fan shaft is in contact with the side cover. Bearing locks, fan set screws, and pulley may need to be loosened and realigned .
  37. Replies
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    Hottest day of summer receiver should be near...

    Hottest day of summer receiver should be near full, coldest day of winter near empty.
  38. Replies
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    378

    Three choices: 1. Liquid injection solenoid 2....

    Three choices:
    1. Liquid injection solenoid
    2. Discharge check valve
    3. Liquid line solenoid/ exv

    Most likely #2. If the compressor has optional service valves it will be easier to evaluate. ...
  39. Replies
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    2,192

    The pipe ends were blocked, standing on end, so...

    The pipe ends were blocked, standing on end, so no thermal air flow. No nitrogen, no excess heat, correct tip selection & settings, proper preheat….
  40. Replies
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    378

    Model number? Oil temp must be x*f above...

    Model number?
    Oil temp must be x*f above saturated. Liquid ref may be leaking into compressor thru injection or ecomizer.
  41. Scary

    Scary
  42. Replies
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    389

    Using cooling tower free cooling, plate...

    Using cooling tower free cooling, plate heat-exchanger, 3-way valves and controls typically would have a short payback north of the Mason-Dickson.
  43. Replies
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    It’s like osha. Selective enforcement, relying...

    It’s like osha. Selective enforcement, relying on people to understand incomprehensible and changing regulations written by bureaucratics.

    I’ve learned as an instructor and technical advisor to...
  44. Replies
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    Size matters.....

    Size matters.....
  45. Replies
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    1,453

    Recover to below 5# before draining to atmosphere.

    Recover to below 5# before draining to atmosphere.
  46. Replies
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    refrigerant dependent based on table. 825753

    refrigerant dependent based on table.

    825753
  47. Replies
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    389

    Seen on lp & hp centrifugals. Without a liquid...

    Seen on lp & hp centrifugals. Without a liquid refrigerant pump I think it was ~ 20-30% of nominal capacity and normally running a higher evap lwt.
  48. Replies
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    1,453

    Just saying sometimes best not to ask or tell,...

    Just saying sometimes best not to ask or tell, but some carry it way to far.
  49. Replies
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    1,453

    Opening requires recovery. Cannot achieve EPA...

    Opening requires recovery. Cannot achieve EPA requirements by internal system pumpdown.
  50. Thread: E-Race

    by ehsx
    Replies
    18
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    3,744

    Really cool. Needed turbo sound effects! A...

    Really cool. Needed turbo sound effects!

    A few years back, before top portion was paved I drove to the top. Jumped out and the lack of oxygen about knocked me down. Had watched the "Wide World...
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