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  1. Replies
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    Approx. 35.25 fthd across the pump. Taking into...

    Approx. 35.25 fthd across the pump. Taking into consideration, the pump's fairly flat curve, and if the pump is running at 1,750rpms you are probably pretty close or slightly over 210gpm. With fairly...
  2. Thread: HydroLock

    by retube
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    411

    Both circuits equalized at the same rate.

    Both circuits equalized at the same rate.
  3. Thread: HydroLock

    by retube
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    411

    I started up a fresh 35ton RTU today and the unit...

    I started up a fresh 35ton RTU today and the unit did not have enough condenser to clear the saturated vapor / suction gas that was in the suction line without limiting out on head pressure. I closed...
  4. Thread: HydroLock

    by retube
    Replies
    4
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    411

    HydroLock

    Have you Hydro-Locked any MicroChannels yet? It's possible even on a perfectly charged unit! Receivers will be the new suction accumulators.
  5. There is a wooden guard-rail, it's on the lower...

    There is a wooden guard-rail, it's on the lower deck.:grin2: Would you believe that whoever installed it never plans on servicing it?!
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    I do have ABB Drives. The burnt mark is near the...

    I do have ABB Drives. The burnt mark is near the remote occupancy and enthalpy terminals. I also have lost the VFD Signal only in the past. Interesting.
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    Carrier RCB Boards

    Has anyone ever had a failure of a RCB Board on multiple different Z Series Units? The reoccurring failure point I have witnessed is near the J4 connector where the discrete inputs are landed. The...
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    Trane IntelliPak Microchannel Leakers

    Has anyone had any issues with the New Large IntelliPaks Condenser Coils? Just asking.
  9. Thread: PH Meter

    by retube
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    672

    The Best

    Myron L
  10. Thread: lennox

    by retube
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    667

    It is a pictorial schematic. If you learn how to...

    It is a pictorial schematic. If you learn how to read them there is nothing simpler.
  11. Replies
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    Pronunciation

    A few years back, in the mid 90's, I had a service manager ask me if I had any applications where one of these new condensing Boilers called the Lennox Complete Heap would fit the bill!!!
  12. Thread: Comfortview 3.0

    by retube
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    3,022

    Ask for 3.2

    Ask for 3.2
  13. Replies
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    3,853

    And Before The Pulse

    The HydroTherm Pulse Boiler. If it wasn't for the leaky heat-exchangers the Pulses were in a league of their own.
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    Not all compressors are the same.

    Ultimately the saving is derived from the use of the VFD's to more closely match the load. Isn't that the savings. The first biggest VFD compressor savings is on the centrifugal, second is found on...
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    The next best thing?

    The next best thing is when it is a really bad design!
  16. Replies
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    Quantity

    It is not just isolated to Trane.:censored:
  17. Replies
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    1,050

    Lennox

    Would you happen to have the Lennox USB adapter #? I can't find it. Thanks in advance.
  18. Slugs of liquid and oil are on the horizon

    Do yourself a favor and install a small accumulator and your compressor will be forever great-full.
  19. Replies
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    1,050

    Lennox PC to L Connection

    Is the Lennox PC to L Converter just a standard RS-232 to RS-485 converter?
  20. Replies
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    I see some compressor change-outs on the horizon....

    I see some compressor change-outs on the horizon. 200'?
  21. Replies
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    1,413

    More times than not you will find errors in the...

    More times than not you will find errors in the config tables of the controller that lock-up.
  22. Replies
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    The scrolls weak link rest assured bearing...

    The scrolls weak link rest assured bearing trouble you have.
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    On a open or closed loop system the sensor is...

    On a open or closed loop system the sensor is usual located 2/3 way out on the system piping to get a actual system Delta P. Here it sound like they actual want to control to Pump Delta P. I wonder...
  24. Replies
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    Do you also notice that it is always the same few...

    Do you also notice that it is always the same few controllers?
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    Just another over-thought Goobermint idea. If the...

    Just another over-thought Goobermint idea. If the truth were known, someone put on a multimillion dollar PowerPoint presentation and the consensus was, probably the gauges alone would pretty much fix...
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    The answers to the questions you need to have...

    The answers to the questions you need to have answered are 1) Where is the delta P sensor located, 2) What is the resistance of the worst coil in the system, 3) What is the differential in the actual...
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    Would this be a Z Series?

    Would this be a Z Series?
  28. Replies
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    Many of older low temp condensing units had steel...

    Many of older low temp condensing units had steel tubing in-between the discharge and the condenser. In the past I brazed in many a brake line from the local auto parts store to repair a low temp...
  29. Thread: Mo betta

    by retube
    Replies
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    2,330

    Oh no I am afraid you are sadly mistaken that is...

    Oh no I am afraid you are sadly mistaken that is the correct piping arrangement for the new 95 seer heat pump. :grin2:
  30. Thread: Micro-Channel

    by retube
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    4,450

    I can tell you what happens after one bad install.

    I can tell you what happens after one bad install.
  31. Thread: Micro-Channel

    by retube
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    4,450

    The serviceability of a leak and blockages...

    The serviceability of a leak and blockages with-in the refrigerant circuiting is what I am concerned with.
  32. Replies
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    As always it depends.

    If the main objective of your chiller plant is to produce the lowest cost chilled water per ton, the most effective control strategy will employ kw control. Long live the CSM.
  33. Thread: Micro-Channel

    by retube
    Replies
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    4,450

    Micro-Channel

    Have you had a bad experience yet?
    :gah:
  34. Replies
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    CCN Float Config

    My Float Configurations disappeared from best page, but program still runs and I can still see in Service Tool but can't see it on front-end or on-line. Has anyone seen this before?
  35. Replies
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    Dump the charge.

    As for myself I quit relying on headmasters quite sometime ago. If you look at the energy conservation aspect along with reducing the operating charge of the unit, you can easily justify a VFD fan...
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    Still have some equipment

    Click
  37. Replies
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    Click

    Click
  38. Replies
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    pic

    93452
  39. Replies
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    Trane AH

    What state would you be in.
    Do you still have the panels.
  40. Replies
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    Refrigeration Tools

    American Ladder Rack $125
    Tank Tower 3-50 $125
    Tank Tower 4-30 $125
    Tank Tower 4-30 $125
    Recovery Machine Yellow Jacket RecoverX $250
    JB Fast Vac 5 Vac Pump $125
    UniWeld Torch $100
    B & MC Tank...
  41. Replies
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    Sweet and only sweat.

    Nice job!:det: Liquid strikes again.
  42. Replies
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    You are well on your way

    A little liquid can do a lot of damage. I think you are already seeing that if you master the basics of the relationships between temperature and pressure things become simpler to understand. Many...
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    Mr rdubs

    Wondered if you had a chance to get back to the store?
  44. Replies
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    Sorry for not posting earlier Mr rdubs

    Keep up the quest and find that valve that is pushing liquid and you will be the man that found what others couldn't. From this project you will gain a great deal of insight for your next...
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    The answer on a "medium temp rack" would be

    Probably not. If the other circuits are running fine and one is icing the icing circuit is pushing liquid. The medium temp racks suction temperature at the motor room is probably near 50*F or more...
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    Easy

    From 2 1/2 decades in the field.
  47. Replies
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    Ice or frost

    To make this happen one thing needs to be present at the location of the ice formation, a low enough temperature for the ice to form. Since this is a medium temp rack, many things can be the root...
  48. Thread: CCN PDFs

    by retube
    Replies
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    1,708

    CCN PDF's ?

    Any CCN PDF's
  49. Thread: oversized pumps

    by retube
    Replies
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    1,572

    VFD Everything

    If it is a pump or fan over 1hp and your application "at times" can use a controlled speed reduction for any reason by all means VFD it. If your application can handle a speed reduction near the 45hz...
  50. Thread: CCN PDFs

    by retube
    Replies
    15
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    1,708

    CCN PDFs

    Does any one have 808-890, 808-891, 808-910, 808-892 in PDF format. The big books are getting old.
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