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  1. Replies
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    If the DP's are working, and the drive's are...

    If the DP's are working, and the drive's are tracking, strainer being plugged would just speed up the drives I think.
    Sediment removal is better on low side of pumps, but it still is operable....
  2. Replies
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    312

    You would like to get your txv to match the...

    You would like to get your txv to match the compressor tonage. Some are adjustable, you can make a change there.
    Dont think of it as a oversized evap, think of it as a high effciency evap with an...
  3. When to upgrade PRV: Leaks; does not maintain...

    When to upgrade PRV:
    Leaks; does not maintain constant pressure; no longer large enough for new or upgrade application (upsize make-up water to 3/4" from 1/2"); strainer threads on bottom no good (I...
  4. Some manufactures have a commercial model...

    Some manufactures have a commercial model available. Stronger build basically, likely able to handle more volume over longer period of time.
    Is it leaking, not maintaing pressure, if it aint broke...
  5. Replies
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    328

    kit is called kriwan electronic compressor motor...

    kit is called kriwan electronic compressor motor protector data downloading cable
    comes with usb adapter, micro usb to usb
    kriwan data cable reader p/n neusb-iso 02s365
    kriwan 3 pin data cord...
  6. Replies
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    328

    power is pretty clean out here, far as i know....

    power is pretty clean out here, far as i know. too much tech componies around to allow for a lot of brown outs.
    but, same places, data centers, network intagrators, server farms all suck up the...
  7. Replies
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    328

    So i spoke with the manufacture rep in ohio...

    So i spoke with the manufacture rep in ohio yesterday.
    They make a cord and adapter kit to tie into a mobile device. Only android, no apple ios. Then you need to download the free aap.
    They no...
  8. Replies
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    328

    Trane cpm, no blinking light

    New intellipak, trips the compressor protection module. These use to have a blinking light, now they have no light and 3 pin slot up above. Pin holes are too smal for a voltage meter probe. How do...
  9. True, true

    I think having 4 ducts into one plenum, 1 being the bypass is what allows for this condition.
    Wouldn't all returns twinned to the same main run and only one way into the plenum would allow for...
  10. Replies
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    600

    Chilled water pvc, we've done it for years. sch80...

    Chilled water pvc, we've done it for years. sch80 up to 6", after that we move to victaulic.
    Buy the better pvc ball valves though, with unions on both ends or get brass.
    Flush the loop very...
  11. Duct furnace blowing hot air out the return

    Duct furnace on roof, bypass damer directly between supply and return plenum in ceiling, 1 of the 3 return air registers is blowing hot air out when in 80 to 100% bypass.
    The duct furnace has one...
  12. Replies
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    2,074

    LL sol valve, many uses. Unloading i'm not sure...

    LL sol valve, many uses. Unloading i'm not sure though.
    LLSV to operate hot gas bypass, yes. Unloading a compressor would basically mean you dont allow refrig to enter the valves for compression....
  13. Replies
    2
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    344

    Duct static refrence

    When using poly tube to refrence duct static to a transducer, due you need to upsize 1/4" tube if the distance exceeds lets say 200'?

    Is there a pressure drop in the tube that would create an...
  14. Replies
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    628

    Duct static refrence

    Is there any reason to upsize a 1/4" poly tube used to refrence duct and or building static?
    Like pressure loss, or inacuracy of static read from point of measurement to point of refrence?

    Is...
  15. Replies
    2
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    298

    Dc bi bo infultration

    Question is due to circumstance below,
    Can the 20vdc signal be falsely sent back to its input, or enough frequency picked up in the wire to give a false signal when the wire is in the same low...
  16. Sounds like after long shut down, your condneser...

    Sounds like after long shut down, your condneser pressure will drop. That makes sense why they can restart, but not after long shutdown.
    However you control the condenser, will allow or prevent...
  17. Replies
    16
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    1,126

    Pressure drop through the loop is why your...

    Pressure drop through the loop is why your differential will be lower further out in the sytem.
    That discharge check valve is likely closed or not open all the way.
    Vibration could be bad bearings....
  18. Replies
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    697

    First, it was discovered that the pressure...

    First, it was discovered that the pressure transducers shipped with the new equipment were the wrong part number. This is not the issue why the drive wont ramp up to maintain higher static set point...
  19. Replies
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    697

    Tr200 danfoss drive on voyager 3

    2 new voyager 3's started up last week. The drives (for the supply fan in each) refused to ramp the motors up to 100%.
    At 54 to 57 hz, each unit vibrated like crazy, the motors got noisy, fan...
  20. Replies
    3
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    556

    instal evap perpendicular to furnace?

    Anyone been successful installing an evaporator coil on a furnace perpendicular, with a plenum in-between?

    I have a horizontal furn cabinet discharging into it's plenum too close to the attic...
  21. Replies
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    489

    Noisy start up York 5 ton condneser

    5 ton 1 year old York condneser is noisy in the afternoon when it starts up.
    I installed it last year, micro channel condenser. In the back yard it catches the afternoon sun directly on it.
    I heard...
  22. Spray foam, i'll bet you're an artist. I make a...

    Spray foam, i'll bet you're an artist. I make a mess with that stuff, but it does clean-up a gappy hole pretty darn quick.
    - i'm glad i'm not the only one who doesn't think heat tape is excessive in...
  23. 30*F Walk-in Fridge, condensate heat tape?

    Does a 30*F fridge require heat tape on the condensate line?

    Suction line securing with strut, is it better to leave horizontal lines loose, or anchored down with strut clamps?

    How deep does a...
  24. Replies
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    1,271

    measure the facce velocity infront of the coil,...

    measure the facce velocity infront of the coil, if it's over 500fpm you are certainly sucking it off the coil.
    good point about condensate venting, low side (static) vents need to be on the leaving...
  25. Replies
    0
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    523

    APC FM50M water cooled dx 3-way valve

    3-way valve (or actuator) went bad on apc upflow dx, water cooled floor mount unit. m/n FM50M-WKA-XXU. i was handed a box of parts and told replace it.
    no unions installed on 1-1/2 copper to 3 way...
  26. Replies
    7
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    1,663

    replacing the blower,

    I'll be doing one of these tomorrow on an FM50M-WKA. thought about removing the left side door and all the electrical associated, but i like the idea about moving the front control panel instead. i...
  27. Replies
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    2,592

    sub cool

    thank you for the replies,
    astute observation, maybe osa was below 75*F.
    could over charge be an issue? I read the condenser was built for 5*F SC, should I pull some charge out since i was closer...
  28. Replies
    29
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    2,973

    worked on an rtu last month, condenser fan motors...

    worked on an rtu last month, condenser fan motors had been replaced by unknown mechanic, fan blades were not oem size. the fan blades were 1" smaller in diameter, caused the unit to trip when osa got...
  29. Replies
    19
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    2,592

    good question

    Thank you for the reply, and the great tips.
    I do not know why, but I could never get over 4 amps out of this compressor. I amped it out just below 4 amps. its a 9 RLA pump.
    By head pressure, do...
  30. loving this high jacked post,

    wanted to ask, when replacing cap tubes, at what point due you turn it over to a txv?
    how often do you find the cap tube clogs up again within 24 to 48 hours? do you find a better drier and flush...
  31. Replies
    19
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    2,592

    Not done, I'll return. BTW, why is it so...

    Not done, I'll return. BTW, why is it so difficult to find a full pt chart for 404a? 5*F increments makes dialing in exact numbers a pain.
    left it running like this for now:
    11*F superheat at the...
  32. Replies
    19
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    2,592

    Really good stuff here. thank you all. I just...

    Really good stuff here. thank you all.
    I just burnt in the new TEV, added a port for suction and liquid at the evap. Pressure test before i drag torches to the roof, time for a coffee break.
    i'll...
  33. Replies
    19
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    2,592

    will tecumseh roto lock service valve fit a...

    will tecumseh roto lock service valve fit a copeland compressor?
    are roto locks universal, or specifically made per brand?
    compressors suction service valve is galled at the stem, will not back...
  34. Replies
    19
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    2,592

    thank you. the tev i chose is externally...

    thank you.
    the tev i chose is externally equalized.
    So, is the 3*F split across the coil, and 80*F compressor superheat suspect?
    IF so, where do you suggest I start after I cofirm subcooling...
  35. Replies
    19
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    2,592

    Evap is 7,100 btu. Sporlan TEV KT-43-RZ LRC Coil...

    Evap is 7,100 btu. Sporlan TEV KT-43-RZ
    LRC Coil Co m/n SLE7100
    Copeland Condenser CS14K6E-TF5-273
    Compressor FJAL-A200-TFC-001
    box is about 8'x4'

    what are common causes for low evap split?
    ...
  36. Replies
    19
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    2,592

    BTW, had subcooling, by memory 5*f. Sight glass...

    BTW, had subcooling, by memory 5*f. Sight glass was clear, condenser is above the evap. I am going to fix a few leaks, yes I understand low charge may have had something to do here.
    Im going to...
  37. Replies
    19
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    2,592

    404a walk in freezer evap

    What are typical causes for low teml split across the evap coil?
    Fiddled around today with a 0 to -10 freezer that was only splitting 3*f across the coil. 80*f superheat at the compressor.
    I...
  38. Replies
    4
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    1,146

    the details, purefire peerless boiler...

    the details,
    purefire peerless boiler pf-140-n-rev2, high e condensing boiler
    natural gas, inlet gas pressure 9.2" wc, when running 6.85"wc
    checked, all gas lines sized appropriately, flue clear,...
  39. Replies
    4
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    1,146

    peerless purefire delayed ignition

    installed 21 peerless purefires in last two years. only have had problems with 2. this most recent call back / warranty is for aa delayed ignition. or if not delayed ignition, basically small...
  40. Replies
    3
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    819

    I'm goin fishen tomorrow. I have successuffly...

    I'm goin fishen tomorrow.
    I have successuffly ran this unit since sunday on return air. I have installed a room sensor and will move control to that tommorow, amongst other parameter changes.
    The...
  41. Replies
    3
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    819

    mcquay mps set-up questions

    set a new mcquay mps062elas50 on a roof this weekend to replace an older model mcquay. The zone stat does not appear to be compatible with this new unit (p/n 665404b-09).
    The plan is to use this...
  42. sounds like a great idea. you just need to...

    sounds like a great idea.
    you just need to ask for a few numbers. obviously passing air across the coil and removing the moisture will remove btu's. cold air is going to come out the supply side...
  43. Replies
    2
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    801

    30*F suction line temp. ya, you're probably...

    30*F suction line temp. ya, you're probably bringing liquid back, or poor heat exchange at the evap.
    I guess the slugging problem was never resolved from the first burn-out. with a 16*f split, i...
  44. Replies
    6
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    1,008

    Thank you gentleman, york supplier never...

    Thank you gentleman, york supplier never mentioned superseded part. the camstat that's in ther is performing as should now that I corrected the rotation. I think with it facing the heat exchanger and...
  45. Replies
    6
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    1,008

    old york fan limit question

    Fan limit switch for this older model york furnace is no longer available. Some one (who knows who or when) replaced it with a camstat p/n fal3c05td120a .
    It looks to have been installed wrong,...
  46. Replies
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    568

    Zones is very basic, simple is always nice. I...

    Zones is very basic, simple is always nice. I have seen a handful of these operate for years with out a hitch. I find most zoning problems are related to set point adjustments, bypass damper issues,...
  47. Replies
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    477

    honeywell temp set point controller

    I see these around once in a blue-moon. Could never find the iom for Honeywell T678B.
    anyone know at what temp of osa this sets the set point up?

    My understanding of this controller is:
    1...
  48. Replies
    2
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    530

    which did you choose? I think rubber pads sounds...

    which did you choose?
    I think rubber pads sounds cheap and easy, but springs sound good if you proportion them correctly. I just replaced broken springs on a Copeland semi herm.
    go to carrier's...
  49. Replies
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    601

    mason industries makes great stuff. i like the...

    mason industries makes great stuff. i like the I-beam idea too, easy. I'm assuming this raising is for run-off of water? whatever you put down there, make sure the rain and sun won't rust/disolve it.
  50. Replies
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    1,967

    5 plus years? commercial isn't really some...

    5 plus years? commercial isn't really some specialized industry, just a few changes from the residential market. Be prepared to be low guy on the totem pole. Most shops need a few cheap guys to run...
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