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  1. Commercial Industrial Sevice Tech. Wanted N. J. / Pa. Area

    A leading commercial and industrial HVAC & Energy Services company based in Southern New Jersey, USA is looking for experienced service techs.

    Doing business for over 35 years we specialize in...
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    Is the close up crew using k o wool glued around...

    Is the close up crew using k o wool glued around the circumference of the tube sheets prior to closing the doors?
    This will save those gaskets from cooking prematurely.

    If these burners are...
  3. I understand approach as the controlled medium...

    I understand approach as the controlled medium minus the controlling medium. An example here would be on a closed circuit cooling tower the leaving loop water temp = 80 and the wet bulb entering air...
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    Ok update here : After a few days run time with...

    Ok update here : After a few days run time with one compressor on the circuit running, a co worker went back and found the turned off compressor with 3/4 of a glass of oil. The problem ; the one we...
  5. Hello All , This is an excellent thread. Lots of...

    Hello All , This is an excellent thread. Lots of good info.
    BeerBeMe, I especially like the document you provided on page 5.
    However , I'm a bit confused. I have always used discharge air minus...
  6. Sorry Walk in not walik in

    Sorry Walk in not walik in
  7. Low and medium temp walik in equipment type.

    I've been replacing equipment for clients lately and have been using Larkin Heatcraft units and blowers.
    I have run into some problems with factory mis wiring and evap. Fan and bracket failures.
    ...
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    Listen here is the facts: yes a water pipe...

    Listen here is the facts: yes a water pipe exposed to the elements is a freeze potential. Fact: if you alerted the Forman or powers to be of the problem and he or they choose to do nothing about it...
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    This is a great argument for the need for a...

    This is a great argument for the need for a national push for federal licensing requirements .
    Where's the freon cops when u need them??


    Sent from my iPhone using Tapatalk
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    Well , as of yesterday I left the unit running on...

    Well , as of yesterday I left the unit running on one compressor in the circuit. I'm expecting to go back Monday afternoon and find a full glass of oil . ( yeah right , wishful thinking )

    The...
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    The problem as I see it is , as a result of...

    The problem as I see it is , as a result of velocity or decreased mass flow rate , the oil was pumped out into the coil and lines but can't make it back.

    The factory engineer seems to agree that...
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    Well , just got off the phone with the factory. ...

    Well , just got off the phone with the factory.
    His assessment is that the original diagnoses was correct. I had a bad txv which caused low velocities and oil logged the cond. and lines.
    They want...
  13. Replies
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    We installed the unit so I'm the first one in on...

    We installed the unit so I'm the first one in on the system. I know everything on the circuit is OEM .
    If this were a factory overcharge of oil then why aren't I getting the stuff back to my...
  14. Replies
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    I realize that my problem is an oil logged...

    I realize that my problem is an oil logged condenser coil and connecting lines.
    Noteworthy here is : I could not use the low point cond. coil ports or the discharge tap on the compressor to...
  15. Replies
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    No solinoids. Yes full recovery performed....

    No solinoids. Yes full recovery performed. Recovered 40 # of R-410 name plate.
  16. Replies
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    One very important omission , the discharge...

    One very important omission , the discharge press, tap directly off the compressor read 510 psig under these conditions. That's a lot of pressure drop a cross the coil. Also , if I shut off one of...
  17. Replies
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    McQuay RTU High Pressure lock out problem

    Model # MPSO50FE2DV1CYBV
    Ser. # FBOU120901718

    I found the unit with a high pressure lock out on circuit one.
    My trouble shooting process led me to condem the TXV which I replaced.

    This is...
  18. Replies
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    666

    Just the grills

    Just the grills
  19. Replies
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    666

    Condensating defussers

    I have a facility with several areas where the defussers are dripping during certain humid days. The typical system consists of constant volume RTU's serving individual zones. The returns are ducted...
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    I agree J P,but it seems that the controls are...

    I agree J P,but it seems that the controls are keeping the machine on, looking for dehumidification.That being said, would'nt you want to set up the controls to keep the EXV open? I've had great...
  21. Replies
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    This is all very confusing. The O.P. states that...

    This is all very confusing. The O.P. states that the E.X.V. is 100% closed when in hot gas mode.That being the case how the heck can the system dehumidify with a closed metering device? Next, what...
  22. Thread: Liebert

    by richper
    Replies
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    893

    Sorry D. V.L. stands for Delaware Valley Liebert.

    Sorry D. V.L. stands for Delaware Valley Liebert.
  23. Thread: Liebert

    by richper
    Replies
    4
    Views
    893

    call D. V. L. in Bristol P.A. They are very...

    call D. V. L. in Bristol P.A. They are very helpful
  24. Thread: South Jersey

    by richper
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    3,356

    He y ascj , How's your'e burner woes going?...

    He y ascj , How's your'e burner woes going? Haven't heard ,just wondering if the rtu. burners are burning .
  25. Thread: Carrier RTU

    by richper
    Replies
    13
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    1,977

    Per sight rules you cant give to technical advice...

    Per sight rules you cant give to technical advice here.Please establish yourself as a pro. member and post in the wright area.Anyway,get the o.&m. manual for the unit and it will tell you the...
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    The system is time initated temp. terminated. The...

    The system is time initated temp. terminated. The timer should advance thru unassisted.The 60 min. setting you speak of is a fail safe setting and should not be looked at as a primary defrost...
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    WHAT??????????????

    WHAT??????????????
  28. Replies
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    Sorry if I offended you but, from your original...

    Sorry if I offended you but, from your original post it sounded like you are not very familiar with this type of system and well what J.P. said....Dito.
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    I use the Tech-Mate, D-Tech"s cheap little...

    I use the Tech-Mate, D-Tech"s cheap little sister.Works great on all cfc's,hcfc's and hfc's except I seem to have trouble with 134a,dont know why?As far as 22 and nitro.,I dont see a problem as long...
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    sounds like your'e in way over your'e head.Obtain...

    sounds like your'e in way over your'e head.Obtain a qualified repair person!!!!
  31. WHATS WRONG WITH R-414B!!!!!!!!

    Some one please tell this old tech why hot shot is sooooo bad???????
  32. Im hesitant about using 409a in an indoor hot...

    Im hesitant about using 409a in an indoor hot ambient due to it's higher head pressures
  33. so what problems are being encounterd with hot...

    so what problems are being encounterd with hot shot?
  34. Replies
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    This problem may ormay not be control related.You...

    This problem may ormay not be control related.You need to do much more trouble shooting. The compressor may be off on internal overload at the time it is being called to run due to a mechanical...
  35. Thread: line sizing

    by richper
    Replies
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    674

    what's the Goodman's refrigerant 22 or 410? Also...

    what's the Goodman's refrigerant 22 or 410? Also the liquid line is ok but I would not use 5/8 suction,that should be 3/4 or prefered 7/8.You dont mention your'e plans for the evap. as you must...
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    Freeze stat installs after heat coil and any...

    Freeze stat installs after heat coil and any system with outdoor piping and coils shall always be protected with propolyne.. glycol.Think about it, if there is an extended power outage in the winter...
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    It sounds like a restriction of some kind going...

    It sounds like a restriction of some kind going on.I would change the metering device,liquid drier,add a suction drier, evac. to 500 mics.,and weigh in a virgin charge.
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    So I guess what I can gather from all the replies...

    So I guess what I can gather from all the replies thus far is opinions vary as well to be expected,and perhaps a form of high temp. limit may be in order here.????
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    Thanks for the replies,my concern with them being...

    Thanks for the replies,my concern with them being on all the time is about our hot summer days to come and the fact that under such low saturation temps. mass flow rate will decrease causing higher...
  40. Replies
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    Crankcase Heaters?

    I changed two compressors this week both at the same site.Same type condensing units,low temp. ..R-404A...walk in freezers...pump down systems..rooftop condensing units..lab.building..maintaining -15...
  41. Replies
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    Yes it does have a cch and I did check it and its...

    Yes it does have a cch and I did check it and its working.
  42. Replies
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    I agree that comment was un called for...back to...

    I agree that comment was un called for...back to subject at hand..My reason for leaving the ranco on the unit was fear of the oem non adjustable pressurestat not making the 35# cut in during a repeat...
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    Update!!!!

    Went back this morning.Guess what......Glass bubbling like crazy...Fixed leak at T.X.V....changed drier..evacuated...charged to proper level and added 5# more winter charge as per russel...
  44. Replies
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    Guys Im sorry if I came off as having an...

    Guys Im sorry if I came off as having an attitude.I try to do things the right way and thats why the post.I truly apreciate the help.I dont have C. M. status and extend the utmost respect to any one...
  45. Replies
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    No hot gas line was only warm iinto valve at that...

    No hot gas line was only warm iinto valve at that time.Asfar as valve numbers I am going back today and will get them.As far as every thing else,I know this fix was not right and oem does not want...
  46. Replies
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    4,513

    The glass was bubbling violently before blocking...

    The glass was bubbling violently before blocking the col.
  47. Replies
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    4,513

    No sir I dont ,But if the oem puts a l.p.switch...

    No sir I dont ,But if the oem puts a l.p.switch on it that wont make the cut in what was I suposed to do?Also if the head master was not dumping hot gas into the receiver to maintain head then it is...
  48. Replies
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    Wait a second ...If the glass cleared after a...

    Wait a second ...If the glass cleared after a couple ounces how can it be that low? also I did fail to mention that there was no t. d. across the head master bypass line which means it was not by...
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    Do you mean to say practice what I preach? Or you...

    Do you mean to say practice what I preach? Or you think she"s under charged? I'll admit my fingers were frozen and I did not go all the way but back to the question at hand please.
  50. Replies
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    Hey ascj.....Thats my QUOTE...... WHAT DO YOU...

    Hey ascj.....Thats my QUOTE...... WHAT DO YOU MEAN...about the customer paying?
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