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  1. Thread: Delta t

    by hvacmike85
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    545

    prob wouldn't change much either way but shut the...

    prob wouldn't change much either way but shut the bypass damper... Done
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    957

    I had a make-up air keep tripping about once...

    I had a make-up air keep tripping about once every couple weeks or so. It had the internal breaker switch on it. I thought great this oughta be fun, but to start I put a new 75va xfmer (orig was 40)...
  3. Don't count out the possibility of getting...

    Don't count out the possibility of getting another bad board, if it were me I'd get another board and the harness. I also wouldn't count out the module either, maybe with the harness being plugged in...
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    Get a meter with a mfd setting, you wont look...

    Get a meter with a mfd setting, you wont look back.. My fieldpiece does it and their not the most expensive but professional grade for sure. Then you can buy other attachments like monometer,...
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    844

    I put a stat on already, I think when I go back...

    I put a stat on already, I think when I go back I'll put a 75va back in, and change wire, contactor, and fan relay. that's gotta do it!
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    844

    first time 24v side, second time common side....

    first time 24v side, second time common side. that's another thing throwin me, I cant recall ever havin a common side of a xfmer bad usually 24v side
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    844

    transformer slow blows?

    I got a carrier A/h keeps blowing transformers about one a month, older unit not my install, first time called noticed several old transformers sitting on a shelf next to furnace thought hum that's...
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    1,186

    transformer was blown no voltage so still doesnt...

    transformer was blown no voltage so still doesnt explain the voltage, was my first thought also
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    1,186

    that wasnt the case or I woudnt be on here...

    that wasnt the case or I woudnt be on here asking, all wiring was in tact
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    1,186

    dont see that as a possibility,theres no low...

    dont see that as a possibility,theres no low voltage wiring involved in a cap
  11. Replies
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    1,186

    120v through stat wire???

    Just wondered if any body has seen this before. First for me. h/p-a/h r22 30kw heat. all were burnt up: capacitor, contactor, o/d stat, defrost board, thermostat, fan relay, transformer,

    call was...
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    608

    If so couldn't that be bad if sent into the ref...

    If so couldn't that be bad if sent into the ref system??
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    608

    I guess that could be possible cause I always...

    I guess that could be possible cause I always shut my guages then the pump then the pump valve. I don't know if I had oil at the guages, I seen it on the Micron guages port and the vac port
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    608

    oil in hoses.

    I had oil in my hoses the other day after a good vac on a new coil and Ac flushed lineset. It's happened once before but can't recall the circumstances. Just weird I though I have a few theorys but...
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    4,257

    yes its one of four must have components....

    yes its one of four must have components. Compressor, metering device, evapoator, condenser
  16. Replies
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    4,257

    A lot of residential guys are briefly trained and...

    A lot of residential guys are briefly trained and sent out on their own, commercial not so much. So if their not purposely ripping you their just incompitent. Find someone that works for a company...
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    4,257

    It's good to get info from people who's not...

    It's good to get info from people who's not trying to sell you something
  18. Replies
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    4,257

    This is all you need to do ^^^. These are basic...

    This is all you need to do ^^^. These are basic refridgeration issues and should be fixed without having to replace the whole system, these companies kill me these days when it come to fixing your...
  19. bing bing! try this first, its an array of...

    bing bing! try this first, its an array of problems it seems, overcharged, restriction, and prob low air on a dirty old furnace fan, check the side of the coil the air goes through, not the side it...
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    9,801

    what program or method do you guys use for load...

    what program or method do you guys use for load calculations? Are commercial calcs easy once manual j is learned
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    2,142

    I would try to put it in a closet if possible,...

    I would try to put it in a closet if possible, attic units can cause you headaches down the road, not to mention service-ability. The second unit would be the smart choice because the upstairs wont...
  22. I have had coils from factory so oily water would...

    I have had coils from factory so oily water would drip off of it before it hit the pan, not always but I try to hit a new coil with some foam cleaner helps em drain, as far as the rest stated above...
  23. Man you are a IAQ guru! I'm pretty good at...

    Man you are a IAQ guru! I'm pretty good at service now so the Air stuff intrest's me and is really technical I think, just another step in this trade i guess
  24. Sounds like it isnt working right at all to me,...

    Sounds like it isnt working right at all to me, to have a 10 deg drop acroos your (inside unit) thats bad cooling! They did not install that correctly, by the mod #'s the units should work fine with...
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    4,326

    better check that pot relay on that start kit, if...

    better check that pot relay on that start kit, if it;s stuck closed that start winding is overheating, nott likely it would run a half hour but it could I guess, if your not sure take it off and see...
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    I'm not the load calc genious on here but I can...

    I'm not the load calc genious on here but I can tell you you go under what the load calc says, so if it said 4.3 you go 4 ton, you could do a two stage also. Shoert cycling is bad and wont remove...
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    7,496

    it would have to be pretty close to the motor to...

    it would have to be pretty close to the motor to do that, cant recall alot being like that, I'm gona look at one and see now!
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    1,348

    ya its the aligning part I wondered if there was...

    ya its the aligning part I wondered if there was a better way
  29. Replies
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    1,348

    you lost me with the stator-atv talk, I think it...

    you lost me with the stator-atv talk, I think it has other holes so you can tighten the bolts back into to seperate it, it just never seems right
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    pully question

    does anyone have a link or data sheet on how to properly remove those pullys with the 3 bolts on the front used on high rpm fans and motors? I know how to get em off but its not the right way and it...
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    7,496

    when does the pickle fork come into play???...

    when does the pickle fork come into play??? interesting
  32. Replies
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    1,123

    better call your installer, has it done this...

    better call your installer, has it done this since day 1? might have a plugged drain which would mean all the humidity in your house is going back into your house and in your unit
  33. Replies
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    9,314

    I dont like changes, I cant figure out how to go...

    I dont like changes, I cant figure out how to go to subscribed post?? Used to be the usercp link now IDK>>>??????
  34. Replies
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    1,621

    ya sounds like your micron guage could be wrong...

    ya sounds like your micron guage could be wrong or dirty, clean it with alcohol. can you just vacuum down the guages to see if it will pull down, I use a seperate micron guage so I can just shut off...
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    more air more amps, could be on wrong speed but...

    more air more amps, could be on wrong speed but probthe half of cat he pulld of the wheel gave you more air more amps. 8 amps is on the higher side not off the charts, try the next lowest speed maybe?
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    GOOD IDEA:cheers:

    GOOD IDEA:cheers:
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    4,030

    well with it being under warranty, thats good at...

    well with it being under warranty, thats good at least, verify airflow of course, I'd change txv, dryer, change whatever could even be possibly wrong, your time is too valueble to go back 4-5 times,...
  38. Replies
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    4,030

    blocked dryer, check temp drop across dryer,...

    blocked dryer, check temp drop across dryer, txv?? dont sound like it but if I were to open that system dryer, txv, new freon, I bet your good to go clean the coil too! How old is it, sounds like the...
  39. Replies
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    1,078

    Just have a buddy come by one night and take the...

    Just have a buddy come by one night and take the outside :payattention:unit, then you csn get a new one
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    Like I said 1,000 times, if they take our guns,...

    Like I said 1,000 times, if they take our guns, first of all people like me will prob flip out and do bad thing because I have alot of money wrapped up into, besides that only the criminals will have...
  41. Replies
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    1,078

    I was thinking the same but mine at home did that...

    I was thinking the same but mine at home did that 5kw of my heat was on and my house was getting warmer not cooler the heat overpowered the a/c but mine could be different, check ampdraw at furnace...
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    2,287

    It's an upflow by the pic

    It's an upflow by the pic
  43. Replies
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    Good thing we have inspectors that don't know...

    Good thing we have inspectors that don't know crap about hvac to pass that crappy duct job, id start by adding a second return or upsizing the one there now, this should be pretty easy with options...
  44. Replies
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    7,710

    :ditto: it can't run too long before checking...

    :ditto: it can't run too long before checking charge on new exp
  45. Replies
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    7,710

    1 deg says it wasnt your filter dryer, but the...

    1 deg says it wasnt your filter dryer, but the txv, and I always do the dryer exp when theres a problem, manf says change dryer when system is opened for any reason but some people just dont wanna...
  46. Replies
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    its not the 14 x 30 grille its the 16" flex goig...

    its not the 14 x 30 grille its the 16" flex goig to it!!! If the duct was 14x30 that would be fine for that, but its not :bump:
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    that could be, the easyest fix would be to just...

    that could be, the easyest fix would be to just add a second return somewhere in a common area if possible, but the one near your stat be the primary ( bigger one) alot of things can cause bad...
  48. Replies
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    7,710

    Alot of times I've noticed the liq line temp...

    Alot of times I've noticed the liq line temp doesnt change much the liq press goes up which increases s/c that way, not sure why, but if your not getting s/c adding a ton of 410 will just result in...
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    821

    Oh and :ditto: to above, we don't know how much...

    Oh and :ditto: to above, we don't know how much air you need but put 14 w damper if I had to guess airflow is like a party the more the merrier lol
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    Woops didnt mean to quote u :LOL:

    Woops didnt mean to quote u :LOL:
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