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  1. Replies
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    Piping charts give an equivelent length value for...

    Piping charts give an equivelent length value for all types of fittings. Just like duct calcs.
  2. Replies
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    2,563

    It is your ethical duty to install correct cap. ...

    It is your ethical duty to install correct cap. Ho is paying a lot of money for your expertise and if the wrong capacitor cause the compressor to fail even a day sooner, that is cheating the...
  3. Replies
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    Why two 1/4” taps? See you already have a high...

    Why two 1/4” taps? See you already have a high limit piped in.
    Very nice job
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    My bet is on breaker lugs are weak. We always...

    My bet is on breaker lugs are weak.
    We always flip cu disconnect off then on to see what reaction we get on calls like this. Try to see if compressor will stall and if breaker will not trip.
  5. Replies
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    451

    Lower blower speed allows more humidity to be...

    Lower blower speed allows more humidity to be removed from the air while not dropping the temperature as quickly. It is because the coil is colder at low
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    better humidity removal with longer cooling...

    better humidity removal with longer cooling cycles, so low is prefered to remove humidity. You can wire a humidistat to force system in low blower speed with high speed cooling with a relay.
  7. I would bring a second motor to be sure.

    I would bring a second motor to be sure.
  8. Replies
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    Walk in freezer- equipment only

    1.5 ton low temp freezer CU and evap coil.
    Heatcraft.

    230 volt 3 phase 404a824732824733824734\

    I have had this in storage 15 years, not used. System was been sealed and with a pressure gauge....
  9. Replies
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    444

    I never make claims on uv lights or ion guns. I...

    I never make claims on uv lights or ion guns. I let the slick literature make the claims. If I can,t show HO has cleaner air, I really can,t defend the product.
  10. Replies
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    Humidity values

    I was asked how much the humidity will drop with a dehumidifier I sold a customer.. Im not sure how to figure that. I know dehumidifier rating
  11. Good point, but older conventional walk-in...

    Good point, but older conventional walk-in compressors often overload on start-up. CC regulator keeps it under control. I don't see much anymore on scroll cooler CU.
  12. I repeat, Using conventional hp equipment will...

    I repeat, Using conventional hp equipment will not push it outside its design envelope. Hpcu is inside a 40 degree environment (cooler box). The ahu, rejecting heat, is in an comfortable 75...
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    986

    i WENT OVER THIS INSTALL. cHECKED floor drain...

    i WENT OVER THIS INSTALL. cHECKED floor drain traps, broken vents, dirty mops. I don't believe stinky evap, but there must be other complaints to Carrier.
  14. Replies
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    986

    Carrier RTU smells

    Had a customer call and complained about Musty odors on a new RTU. Not my install.
    Fast Forward. Carrier admits dirty sock smell and suggest replacing evap coil because off gassing of recycled...
  15. You have wiring for straight cool? This appears...

    You have wiring for straight cool? This appears to be heat pump (TWA120).
  16. Trane instructions is what to follow, they...

    Trane instructions is what to follow, they warranty the equipment.

    Liquid line. 50 PSI pressure drop allowed.
    Sight glass- I think used primarily to monitor moisture.

    I been installing LLD at...
  17. Replies
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    Ill check Carrier

    Ill check Carrier
  18. Thanks for the double riser info, but not seeing...

    Thanks for the double riser info, but not seeing that in Tranes' guidebook. Trane pipe guidlines indicate installing a liquid line drier. I didn't think there is any good reason for a sight glass...
  19. System cools emergency transmitter. Hardly ever...

    System cools emergency transmitter. Hardly ever needed, but it is hot when its on.
    I do not want to rerun lineset, need to reuse existing lineset.

    Found out Trane had not written lineset install...
  20. Trane American Standard help on two compressor set-up

    I am designing a system that is using two compressor manifold set-up. TTA12044CAA. CU
    I am not getting sufficient information from my supplier. The system will probably never go into second stage...
  21. Replies
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    10 ton 70/30 split

    I am looking for a 2 stage ten ton split system set-up. I am looking for a 70/30 % split set-up instead of the usual 50/50% split. Anyone know of any?
  22. We are under the assumption that the old set-up...

    We are under the assumption that the old set-up had proper ventilation to supply combustion air. That would be the basement had openings to the outside that weren't sealed. Many homeowners cannot...
  23. sealed combustion chambers on WH and furnace. ...

    sealed combustion chambers on WH and furnace. Won't make basement air any better or worse. Consider as if they weren't even there.
  24. Thread: Ruud furnace

    by timjimbob
    Replies
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    1,041

    How long after igniter goes out does voltage go...

    How long after igniter goes out does voltage go to zero? Did you clean flames sensor
  25. Not all tankless water heaters are vented through...

    Not all tankless water heaters are vented through pvc or direct vent
  26. Replies
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    Energy code has changed. Hp and economizer may...

    Energy code has changed. Hp and economizer may be a requirement. Smoke detectors also. It’s real. Code official will make you correct the issue regardless of the cost, if caught.
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    Charging hose idea is interesting, but hoses...

    Charging hose idea is interesting, but hoses probably are not intended for continual usage. I have had ac hoses made at hose supplier that used auto ac hose, but be sure pressure rating is proper.
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    Sure helps if you get Ho involved. Show him how...

    Sure helps if you get Ho involved.
    Show him how to check float switch. How to recognize if blower is running and if cu is running. Ice on suction.
    This is information we seek when we get a call...
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    Fan off. Compressor shuts down. Happens all the...

    Fan off. Compressor shuts down. Happens all the time
  30. Thread: PVC glue

    by timjimbob
    Replies
    3
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    2,205

    PVC glue

    Need pvc pipe cutters that have teeth in the handle to unscrew glue caps. Why do I need pliers and pvc cutter
  31. Florist shop. Room temp is 72 degrees. Box temp...

    Florist shop. Room temp is 72 degrees. Box temp is 40 degrees where outside hpcu is installed in the walk-in box. Plenty of room and no nsf concerns.

    Parameters of a residential hp.. outside...
  32. Just read this in trade magazine. There is a new...

    Just read this in trade magazine. There is a new brazeless removable fitting that is for refrigeration..

    Personally, I have been cutting and brazing lineset on minisplit for years. Manufactures...
  33. Replies
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    I use a analog gauge that retains highest...

    I use a analog gauge that retains highest pressure. Leave it on for a day.. this will tell you if cfm is dropping out.

    Next time it fails, instruct customer to put his hand on cfm hub on...
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    It did not.

    It did not.
  35. Replies
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    Armstrong Allied AHUs problems

    I had been installing 3 to 5 ton Armstrong AHUs for heat pumps. (Allied)
    I have had many problems with intermittent restrictions in AC mode. Diagnosed as bad TXV, I have replaced plenty under two...
  36. Thread: Filters

    by timjimbob
    Replies
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    1,425

    I tell my customers the best air filter is a...

    I tell my customers the best air filter is a piece of cardboard. Do you get it now?
  37. Replies
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    May try to fuse each control load with a one amp...

    May try to fuse each control load with a one amp fuse. RV,contactor, fan cotactor. See which one blows and that will narrow it down.
  38. 1987 evap. No way would I consider labor to R&R...

    1987 evap. No way would I consider labor to R&R to clean that coil. If you going to all the trouble, try to find a new coil to put in its place. 33 year old is old, R22 is no longer made.
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    Analogy. Chinese have been wearing paper masks...

    Analogy. Chinese have been wearing paper masks to block diseases lately. Probably is helping but would sure cause problems if they were to run a marathon.
    Point is a piece if cardboard is great at...
  40. Replies
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    I can think of a dozens other reasons why amp...

    I can think of a dozens other reasons why amp draws increase on compressors. I think this is a poor way to predict when to clean a coil.

    Contactor ratings may state incadescent load and motor...
  41. Replies
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    We ususally leave air compressor repairs to...

    We ususally leave air compressor repairs to compressed air subcontractors, but if you are real curious get a part breakdown. You're just in a repair that you need more training.
  42. Was not done.... Be sure nothing is stuck in...

    Was not done.... Be sure nothing is stuck in blower wheel.
  43. I am guessing. ECM motor and ramping changes is...

    I am guessing. ECM motor and ramping changes is why it changes throughout cycle
  44. No problems with Ecobee here. Have a few in my...

    No problems with Ecobee here. Have a few in my own home. I am amazed with the intellegence. Set it to be 70 degrees when I get up every day at 4 AM. Hits the mark and furnace is cycling off right...
  45. Replies
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    With system running a whale, put your finger on...

    With system running a whale, put your finger on the breaker that trips and feel it is warm. An overloaded breaker will not be warm but a breaker with a bad lug connection will feel warm. This is a...
  46. You can measure static pressure drop, but this...

    You can measure static pressure drop, but this will tell you if you dont have enough. But it also depends on total system ductwork. With RA, more is better.
  47. Compressor motor heat is rejected through the...

    Compressor motor heat is rejected through the condenser on a refrigerant cooled compressor.
    Hey, Tesla didn't do a study of drive time listenership to determine how powerful the first transmitter...
  48. OK Use larger walk-in box. #2 "Equipment NOT...

    OK Use larger walk-in box.
    #2 "Equipment NOT designed for the parameters it is operating in will use way more power." Only parameter that may be off is AHU temperatures may be 75 to 80 ambient. ...
  49. Used. My luck it would be three phase. ...

    Used. My luck it would be three phase.
    Complete HP setup new would cost me $1100. And I can pick it up Saturday without ordering it in.
  50. I don't see how an air handler is designed to...

    I don't see how an air handler is designed to work at a cold 40deg. A HPCU can be hosed down when cooler box is being cleaned.







    hpcu
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