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  1. Replies
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    looking for someone special...

    i am looking for help, I'm posting this places the right someone might see it...if thats you...feel free to pm me or email me or respond here...sometimes my quizzes develop some interestingly...
  2. I found a study by the College of Architecture,...

    I found a study by the College of Architecture, Illinois Institute of Technology, Chicago that claims people generate the following approximations


    Btuh per person

    Seated at rest
    Theater
    245...
  3. Mechanical cooling - sizing for a night club

    I'm not really involved in this project at all, but I'm curious...


    Project is adding an additional floor to an existing night club, 2 relatively sealed(fire rated) stairwells only connecting the...
  4. Solar load deflectors and air/water source condenser upgrade...OMG

    So I see these 3 condensers on a roof today, they are the 4 fan model of computer room units like a liebert or data aire....there's a garden watering hose underneath each of them, the kind with the...
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    dataaire design Q about head pressure

    i reposted this in the pro forum...please delete me...
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    make that 3 air handlers initially expanded to 9...

    make that 3 air handlers initially expanded to 9 each
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    im in love with turbocores...i wanna machine a...

    im in love with turbocores...i wanna machine a mini-cor just to have running on my desk keeping my water cold all day :D


    ...it could be done:pileon:
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    thanx for the input... ive serviced turbocores...

    thanx for the input...

    ive serviced turbocores in both smardt chillers and in retrofit applications...i would be going to canada for a week if we go this route :D

    i can understand the chilled...
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    Data Center A/C system :D

    so a couple months ago i took the plunge from industrial refrigeration to DataCenter Facility management. I can see now why they hired me being the issues with the air conditioning systems(i...
  10. well then normally i would feel bad about...

    well then normally i would feel bad about hijacking this but...


    anyone been on any good fishing trips lately? :LOL:
  11. correction...warmer suction line opens the valve...

    correction...warmer suction line opens the valve to feed more refrigerant in order to lower superheat by increasing refrigerant flow. colder suction line closes valve in order to raise superheat by...
  12. best of phoenix is a grownup equivalent to the...

    best of phoenix is a grownup equivalent to the highschool prom queen vote.


    1. Any idea what would be the point of taking the txv bulb from inside the unit and placing it outside the unit on the...
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    so long as it is not in sunlight at any time you...

    so long as it is not in sunlight at any time you should be just fine. being off 3-4 deg is no big deal just change the parameters to reflect that. the aux should only kick in when you need it which...
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    yep sounds overloaded. those heatcraft condensing...

    yep sounds overloaded. those heatcraft condensing units sometimes come with a compressor protection module that wont let the compressor run long enough to bring the box down to design temp due to...
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    overcharged, undersized condenser for the...

    overcharged, undersized condenser for the application, and proly many others i cant think of right now. did you check amps on the condenser fans? wheres your oil level? has anyone added oil recently?...
  16. no not at all. but if you took that 4 ton unit...

    no not at all.

    but if you took that 4 ton unit and put a new 3 ton compressor in it it would work. so long as its not a heat pump. the increased condenser size will increase efficiency when used...
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    i would suggest installing a sight glass. this...

    i would suggest installing a sight glass. this will allow you to recover the refrigerant and weigh it back in. being that you'll have the system open you might as well change the dryer and check the...
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    only one for me...so far...

    i was in phoenix az durring rush hour going about 45 bumper to bumper...reached down to crank up the a/c, looked up and about 30 feet ahead was stopped brakelights. i was in a 98 chevy 3/4 ton...
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    the infamous maintenance checklist

    well i sure did it this time. i work for a residential/light commercial hvac service company and i'm in charge of revamping our mechanical system checklist for our maintenance program. one of my...
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    Just figured it out shift F7 in Word brings up...

    Just figured it out shift F7 in Word brings up the thesaurus.

    makes sense now...if i ever met the guy that made microsoft garbage the standard in global computing technology i'd try my damndest to...
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    nor were those words exclamatory, as for...

    nor were those words exclamatory, as for "ubiquitous" i was trying to express the need for an "ever-present" display of my ability to spell not only you and your, but also more sophisticated words...
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    2,086

    not being able to and not caring to are two very...

    not being able to and not caring to are two very different things. perhaps a ubiquitous compilation of exclamatory words of enormously outrageous numbers of syllables is in order?
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    water is condensing in ur ductwork because the...

    water is condensing in ur ductwork because the surface temp of the duct is below the dewpoint of the air moving through it. insulating the ductwork is a must if its not already insulated.
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    u should read a little book called the secret. ...

    u should read a little book called the secret.


    realize what ur doing to ur world.



    negative is bad.
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    time to call someone out n make sure they check...

    time to call someone out n make sure they check the temp rise across ur furnace.

    on second thought...is ur filter clean and installed correctly?
  26. im really curious how u derived that from what i...

    im really curious how u derived that from what i said.
  27. Replies
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    finding a job has never been a problem since i...

    finding a job has never been a problem since i got into the trade, finding a good job, working for decent peeps that are more concerned with doing a good job rather than how much money came in on the...
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    personally if it were me, id run the fan on the...

    personally if it were me, id run the fan on the furnace for a week or so n see how it "feels". being a newer variable speed it should cost less to run than a normal blower according to the sales...
  29. Thread: Fan question

    by My77GMC
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    because after 16 posts of bs theres finally a...

    because after 16 posts of bs theres finally a concrete answer to the question asked in the first place. i like it when my questions get concrete answers so i try to do the same for others. im sure he...
  30. Thread: Fan question

    by My77GMC
    Replies
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    1,123

    just to be myself, this is directly from...

    just to be myself, this is directly from "Refrigeration & Air Conditioning Technology" 4th edition, Witman, Johnson, Tomczyk. Section 4: Electric Motors unit 17 section 14: Permanent split capacitor...
  31. Thread: Fan question

    by My77GMC
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    1,123

    so drag doesnt influence speed? that can be ur...

    so drag doesnt influence speed?

    that can be ur little secret

    to answer ur question it will be above the rated speed, until it overheats, then it will be approximately 0 rpm, + or - 0 rpm
  32. not at all, if it fits properly...my experience...

    not at all, if it fits properly...my experience with those honeywell media filters is that the sizes arent the standard 16x25x4. so we just ordered the honeywell replacements. plus i like honeywell,...
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    it better be lol...and gold plated for me to be...

    it better be lol...and gold plated for me to be impressed
  34. Replies
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    using nitrogen when u braze keeps the inside of...

    using nitrogen when u braze keeps the inside of the copper from oxydizing rapidly and flaking off creating bunches of little bits that plug cap tubes n txv strainers. not always but sometime it'll...
  35. the negative numbers are due to the guy using a...

    the negative numbers are due to the guy using a single port manometer. if he'd had a dual port it would have just been one number. in this case you add the 2, so the first floor numbers will work: .5...
  36. yeah go get a honeywell... other filters that...

    yeah go get a honeywell...

    other filters that say 16x25x4 wont fit, they're like 1/4" too...either way, get a honeywell. and id suggest getting one identical to the one u have now, changing filter...
  37. Thread: Fan question

    by My77GMC
    Replies
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    1,123

    Precisimo! squirrel cage blowers against a...

    Precisimo!

    squirrel cage blowers against a blocked coil, either pulling or pushing, will speed up BECAUSE there is less resistance BECAUSE there is less air being moved.

    the motor will also...
  38. Replies
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    first off depending on the unit, some have both a...

    first off depending on the unit, some have both a thermopile and a thermocouple, if u have the thing apart and are replacing one might as well do the other as well, but as a free acct thats ur call. ...
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    this is one of the many reasons i like being an...

    this is one of the many reasons i like being an industrial mechanic, if the customer has a problem they have to talk to the office bout it, i dont have time to sit n squable with peeps. boss likes me...
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    being that ur family has breathing problems...

    being that ur family has breathing problems you'll want ur air filtration running year round, so why add the expense of having an infloor system and a forced air system, although redundancy can be a...
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    bob ur spot on with the setup...thanx for...

    bob ur spot on with the setup...thanx for responding. there are 2 seperate valves and it is wet/dry depending on time of year/weather.

    how do u properly charge this system?

    would it be better...
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    there are subcoolers at the evaps and i do know...

    there are subcoolers at the evaps and i do know the txv's are getting liquid based on temp/press. i'd really like some info on charging this properly. i looked on sporlans website but none off the...
  43. seer rating of 15 is kinda middle of the road to...

    seer rating of 15 is kinda middle of the road to low as far as efficiency goes. 13 the lowest for new units if i remember right n 19 on the high end, haven't checked in years. go with a name brand n...
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    water temp is entirely dependant on system...

    water temp is entirely dependant on system design. here in az we dont see much higher than 120 on forced air hydronic systems. but up north 180 is very common. what part of the planet are u on? do u...
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    sorry i wasnt specific enuf...its a water cooled...

    sorry i wasnt specific enuf...its a water cooled condenser. the refrigerant is piped through the condenser itself and water flows over the refrigerant pipes. tower fan setpoint is 74 with a 4 deg...
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    thanx for the appology :)

    thanx for the appology :)
  47. Replies
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    gee clint, i cant begin to tell you how help full...

    gee clint, i cant begin to tell you how help full you've been. perhaps if i had had this resource at my disposal while i was there you could have been there to save the day, unfortunately im left to...
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    Q: "Blowby" valve at condensor

    i was working on a cold storage warehouse in a 40 deg room, has 2 r-22 circuits, 3 evaps each and a fluid cooler style cooling tower. my goto guy said to clear the sight glass, but then later on the...
  49. yeah theres a little factory drier in there...

    yeah theres a little factory drier in there proly. its small though. ive seen a few come apart on the inside, the little drier balls end up at whatever metering device causing a restriction. always...
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