Search:

Type: Posts; User: mccann

Page 1 of 6 1 2 3 4

Search: Search took 0.06 seconds; generated 5 minute(s) ago.

  1. Replies
    4
    Views
    466

    Yes I did the plug already. Going back to replace...

    Yes I did the plug already. Going back to replace the pump.
  2. Replies
    4
    Views
    466

    That would be too smart to put a panel to inspect...

    That would be too smart to put a panel to inspect something. No, it does not have one. It's a nice office so I best put down a tarp. Arrrg. If someone could take photos of me removing it and...
  3. Replies
    59
    Views
    3,605

    This has been fun reading.

    This has been fun reading.
  4. Replies
    4
    Views
    466

    Mini-split cassette pump replacement?

    LG, cassette mini-split, LMCN125HV, in an office.
    Is it difficult to remove the foam water pan to access and replace the condensate pump? I assume that's what needs to be done. The service manuals...
  5. So I went back in the cool morning to restart it....

    So I went back in the cool morning to restart it. It was low on refrigerant, which is interesting how the AXV operated giving high suction. Also found that this condenser will not work with this...
  6. That sounds like a bummer too. I've been...

    That sounds like a bummer too. I've been researching this condenser and compressor. The Copeland Mobile App shows running this at 38*F SST puts this compressor outside its' design. I will try to...
  7. Wine cooler, AXV, automatic expansion valve and other issues.

    I have never dealt with this type of wine cooler.
    Evaporator is an IRC coil, HS-31, designed for wine cooling apparently.
    Condenser, Copeland M6QM-H049-IAA-272
    I came to a wine cooler walk-in....
  8. Replies
    66
    Views
    3,252

    While the economy is hot because of the tax cuts,...

    While the economy is hot because of the tax cuts, deregulation, low fed rates and the general business cycle, it's a good time to try to fix some things with China. Tariffs are scary and may not...
  9. Thread: Liebert Parts

    by mccann
    Replies
    6
    Views
    685

    Liebert is now Vertiv. Check their web site for...

    Liebert is now Vertiv. Check their web site for distributors, though the site seems to be down at this moment.
  10. It's for a Siemens MRI. What is a PITA? I can...

    It's for a Siemens MRI. What is a PITA? I can tell I don't like these CBox's before this is even started. The side panels look like they can't be removed when it's running without causing high head;...
  11. Replies
    46
    Views
    16,940

    I like the idea of dishwashing detergent.

    I like the idea of dishwashing detergent.
  12. Replies
    5
    Views
    598

    Safari 12.1.1

    Safari 12.1.1
  13. Replies
    5
    Views
    598

    I can not "Like" post

    When I click on the Like post, nothing happens.
  14. Manufactures instructions are not completely...

    Manufactures instructions are not completely clear. Mfg. instruction says vent the highest point. It should say vent all high points where air might get trapped.
  15. Thanks, I will look for those B&G books. To know...

    Thanks, I will look for those B&G books. To know is good.
  16. Yes, MRIs are a bear because when you're doing a...

    Yes, MRIs are a bear because when you're doing a PM, you can't shut them down without major scheduling. I hate when vents don't have a ball valve below them. You're like: I wonder if that vent works?
  17. If our installers had this knowledge before they...

    If our installers had this knowledge before they started piping, they could have avoided that highpoint and used less fittings. They did not need those 90s there. It was an unnecessary configuration,...
  18. Oh, that makes sense. Awesome.

    Oh, that makes sense. Awesome.
  19. Thank you. I have instructed the install crew to...

    Thank you. I have instructed the install crew to put air vents there.
    This chiller is a small Kraus process chiller for MRIs and CT scanners at a radiology place, which we have a lot of around...
  20. Here is a photo of the concern:

    Here is a photo of the concern:
  21. Will a small high point cause an air lock if not vented?

    How large of a high point in a closed loop chilled water piping system would require an air vent?
    I am tasked to fill and start a small Kraus process chiller for an MRI. It has air vents at the...
  22. It has an expansion tank, which is built into the...

    It has an expansion tank, which is built into the chiller and it is a bladder type, so what? That has nothing to do with the air vents that are supposed to be put at high points. I wanted to know if...
  23. It is a completely closed loop with no buffer...

    It is a completely closed loop with no buffer tank. The chiller is a new KKT Kraus small process chiller for a MRI machine.Process chiller piping.JPG
  24. Is an air vent always needed at every high point in a closed loop?

    How large of a high point in a closed loop chilled water piping system would require an air vent?
    I am tasked to fill and start a process chiller for an MRI. It has an air vent at a high point, but...
  25. Replies
    5
    Views
    572

    The controller expects the compressor to start...

    The controller expects the compressor to start and stop and pump down, so will give you an alarm regardless of what you jump out. Just go into alarm settings and disable that alarm for that circuit....
  26. Replies
    20
    Views
    1,559

    That's awesome!

    That's awesome!
  27. Thanks, but I was looking for fellow technicians...

    Thanks, but I was looking for fellow technicians who have experienced developing something or submitting ideas who might have some insight.
    99% of patents do not make money and probably 99.999% had...
  28. Thread: Sight glass

    by mccann
    Replies
    39
    Views
    3,113

    Safety has never been a concern in where I am in...

    Safety has never been a concern in where I am in Arizona. It's a right to fall state.
  29. Replies
    20
    Views
    1,559

    I did 18 years in supermarkets and have now been...

    I did 18 years in supermarkets and have now been in commercial for 6 years.
    I was surprised to find unlike a nice supermarket where they have a store plan on the mechanical room wall with...
  30. When should I call an idea a business and what about selling an idea?

    I recently wrote a provisional patent application and registered an idea. I have several question about developing my idea and selling it.

    Should I start a business if: in my first year I may not...
  31. Replies
    18
    Views
    8,231

    Oversized computer room cooling is getting very...

    Oversized computer room cooling is getting very common. On these smaller Liebert units, open the hot gas bypass some to rase suction pressure to give yourself a longer run time. Hot gas valve...
  32. Zone system on small office building confusion

    How does a zone, Trane Integrated Control System decide which thermostat or sensor is controlling the AC unit to come on or is it using some combination of sensors to decide? I have little experience...
  33. Replies
    31
    Views
    17,688

    If you invent a tool, and you don't get a patent...

    If you invent a tool, and you don't get a patent or provisional right away, and you use it at work, and someone sees it, it is considered as disclosed publicly, especially if you have waited a year...
  34. Replies
    20
    Views
    2,490

    If this unit has a CTI board, look at the front...

    If this unit has a CTI board, look at the front of the CTI board and make sure none of the components are leaning over and touching another component. CTI boards parts are soldered very high on the...
  35. Replies
    31
    Views
    17,688

    Now I'm studying how to make proper drawings and...

    Now I'm studying how to make proper drawings and use the correct words. I intend to get a provisional patent, which will last 1 year. Then I will offer the idea to a few companies. If they don't buy...
  36. Replies
    28
    Views
    1,786

    Freezer must be off so line is warm when gluing....

    Freezer must be off so line is warm when gluing. You must follow the instructions on 520 Armiflex glue exactly or it will not stay stuck; i.e., It must be almost dry on each side before pressing...
  37. Thread: van hooks

    by mccann
    Replies
    3
    Views
    2,359

    Just admit it; the Hose'n wire hooks are better....

    Just admit it; the Hose'n wire hooks are better. Soft, strong, long lasting, adaptable, cheap to made from scrap hose, fun for the whole family. Throw those other straps and hooks away. Men with a...
  38. Thread: van hooks

    by mccann
    Replies
    3
    Views
    2,359

    van hooks

    With some good stout fence wire and some hose material you can make nice hooks for the van.
    On the two sided hook, when you unhook one side to get a belt, the hook stays up making it easy to sort...
  39. I got ahold of Lennox support. They said the...

    I got ahold of Lennox support. They said the motor manufacturer does not recommend twinning, so units should be replaced.
    I spoke with Jackson Systems, who sell the iO-Universal-Twinning kit, same...
  40. I don't think you are being harsh; I think you...

    I don't think you are being harsh; I think you are just a bit lazy at explaining why. There is no twinning board, which is the situation I am dealing with, will the safeties on the unit will not...
  41. That was my concern. I have read similar things...

    That was my concern. I have read similar things on other threads, but was looking for someone with experience in a failure or direct knowledge of this unit. Lennox support was difficult to get ahold...
  42. Is a twinning kit always needed with system that does not have twinning terminals?

    The complaint is the house is slow to reach setpoint.
    Two questions:Is a twinning board always needed with twinned system that do not have twinning terminals? The system is wired with just t-stat...
  43. Trane only helps Trane employees I have found. It...

    Trane only helps Trane employees I have found. It seems to be their business model idea to force people to hire Trane perhaps.
  44. Reliatel boards do not need an interface board....

    Reliatel boards do not need an interface board. They have Y1, y2, etc, terminals so can work with regular t-stats.
  45. Replies
    6
    Views
    1,026

    No more answers. I guess I didn't ask good...

    No more answers. I guess I didn't ask good questions.
  46. Replies
    6
    Views
    1,026

    Thanks. I went back and replaced the supply...

    Thanks. I went back and replaced the supply sensor on the unit with supply setpoint alarm and the return sensor on the morning warm-up unit. The sensors were only $10 surprisingly from Trane. I did...
  47. Replies
    6
    Views
    1,026

    Never mind the side note regarding the dip switch...

    Never mind the side note regarding the dip switch setting on the UVM for VFD, I see it says UCP dip switch location not UVM.
  48. Replies
    6
    Views
    1,026

    old trane 50 ton controls and alarms

    Trying to understand controles to old 50 ton Trane. Tracer alarms show morning warm up setpoint fail on one unit and a SA temperature setpoint fail on another unit.
    Is the morning warm up setpoint...
  49. Replies
    1
    Views
    718

    don't see new post I did

    posted in commercial. My activity shows no new activity and I don't see my post.
  50. Replies
    26
    Views
    4,270

    There's a thread someplace on HVAC Talk called...

    There's a thread someplace on HVAC Talk called "finding a vacuum leak" where he used isopropyl alcohol. Interesting I thought.
Results 1 to 50 of 288
Page 1 of 6 1 2 3 4