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Type: Posts; User: mccann

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  1. Replies
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    458

    I don't know. You never really know. I like to...

    I don't know. You never really know. I like to have a core removal tool handy with the core remover stem taken out. If refrigerant starts blasting, you can put the removal tool over the schrader,...
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    3
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    395

    The more they want to change, the more we make...

    The more they want to change, the more we make money.
    Robots will build it so well, it will never need service.
  3. Some units reheat by having a secondary condenser...

    Some units reheat by having a secondary condenser coil in the supply. I thought that cool.
  4. Replies
    28
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    2,113

    Assuming motor is good, coil is clean, pressure...

    Assuming motor is good, coil is clean, pressure control is working correctly, wiring is tight; Data-Aire seems to have this issue; like the P66 is not fast enough on a cold night, when your not...
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    1,209

    I've saw a big piece of sheet metal blow off the...

    I've saw a big piece of sheet metal blow off the roof up into the power lines and take out the whole building. Does that count?
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    11
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    611

    Supplement your formal learning with Youtube...

    Supplement your formal learning with Youtube videos. Although a lot are terrible, some are ok, and anyway, it gets you a view of moving through equipment and the terminology that's out there. Just...
  7. Replies
    7
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    319

    I have had intermittent low pressure alarms on a...

    I have had intermittent low pressure alarms on a Liebert. New board and switch. Pressure is good. All that is left is the wiring plug or gremlins. Next time all will have some electronics cleaner...
  8. Belimo makes one they advertise with zip-code and...

    Belimo makes one they advertise with zip-code and easy read trouble shooting and alarm. I have not seen one yet. Honeywell liked to make things as unclear and difficult as possible in the past. I...
  9. Replies
    76
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    3,369

    Is that all you got to say? ha ha, very good.

    Is that all you got to say?
    ha ha, very good.
  10. Replies
    28
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    2,113

    I am new to the computer room ACs. I had two...

    I am new to the computer room ACs. I had two separate Data Aire units do this head trip at the same location. I was told it was a problem for a long time because it was not factory fan motors even...
  11. Replies
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    1,582

    point?

    point?
  12. Replies
    40
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    1,582

    If it gets a big leak or if they have other...

    If it gets a big leak or if they have other systems that can use the r-22, I would change it out to 407c to save money for the customer. As for torching the receiver, I try to torch it in a good spot...
  13. Replies
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    3,369

    I agree. It seems stupid to me to run a little...

    I agree. It seems stupid to me to run a little poky freezer in a vacuum if you care about ever having a leak on the low side. They do not care about that or service. They care about production cost...
  14. Thread: Leak repair

    by mccann
    Replies
    20
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    954

    Very good Sir. I too was thinking of a saddle....

    Very good Sir. I too was thinking of a saddle. Weld a schrader or a small piece of soft " pipe through a piece of copper pipe bigger than your leak. Cut out a saddle shape around it with a carbide...
  15. Thread: Sight glass

    by mccann
    Replies
    33
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    2,010

    Leak Lock is great. It has saved old flares and...

    Leak Lock is great. It has saved old flares and unions in a pinch.
  16. Replies
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    4,444

    You have to prioritize as a tech. The PM check...

    You have to prioritize as a tech. The PM check list sometimes has crazy stuff like write down the amp draw of some hp motor. Who really cares? Are you going to change it if it's a little off? No. ...
  17. Replies
    2
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    300

    curs-id non-labelers

    I wish installers would label the t-stat with the corresponding unit number. It's a pain going up and down the ladder to see if your working on the right unit quickly.
    Curse you non-labelers. ...
  18. Replies
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    804

    Oh, now I recently saw those check valves. Why is...

    Oh, now I recently saw those check valves. Why is it there? Migration?
  19. Replies
    9
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    804

    It is good to have a bunch of those green magnet...

    It is good to have a bunch of those green magnet things to energize all solenoids when evacuating. I don't know the model# of the unit. On the few Mini-mate Lieberts I've seen, I think the solenoid...
  20. Replies
    9
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    804

    Most R-22 headmasters start bypassing hot gas...

    Most R-22 headmasters start bypassing hot gas into the receiver at about 180# to maintain head pressure, at the same time refrigerant starts backing up into the condenser coil. Although it is...
  21. Sounds like you make quality stuff. I like taps...

    Sounds like you make quality stuff. I like taps and sensors in as many places as possible. Service valves are better than schrader, less leak potential. Siemens makes good stuff, high quality in...
  22. I would think it's to save money on the...

    I would think it's to save money on the production line in some way or it was just where they put it without engineering deep thought. Need high side port, mmmm, put it there. Get it out the door...
  23. Replies
    18
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    1,202

    I have seen supermarkets get warm because the...

    I have seen supermarkets get warm because the exhaust hoods were pulling out a bunch of the cold conditioned air. The AC couldn't keep up. The MUA units were broken swamp coolers. ha ha. I hate...
  24. Replies
    35
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    3,177

    I recently had a Liebert that had been converted...

    I recently had a Liebert that had been converted to Digital Scroll a year before by others. They changed out the B66 fan control to a VFD. Liebert said the VFD reacts much faster. The head pressure...
  25. Thread: 1974

    by mccann
    Replies
    16
    Views
    840

    1974

    408151408161
    1974 York package unit still going with original compressor. I just thought it was cool.
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