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Type: Posts; User: Capz

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  1. Replies
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    Desert Guy, can you email me the JC handbook pdf?...

    Desert Guy, can you email me the JC handbook pdf?
    Thank You
  2. Replies
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    362

    Actuators often, such as some Belimo will use...

    Actuators often, such as some Belimo will use 0-10 vdc thus the reason for the analog output. This gives full modulating control.

    Ditigal or binary output is a 24vac signal driving the actuator...
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    Did you check the loop water pressure? How many...

    Did you check the loop water pressure? How many floors above the pump is this reheat located?
  4. Replies
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    399

    Did you actually remove the screen from the...

    Did you actually remove the screen from the strainer in order to clean? What are you using for a control valve? What controls it?
  5. I 2x what Gravity wrote. I have a 400,000 btu AC...

    I 2x what Gravity wrote. I have a 400,000 btu AC with dual Copelands using unloaders. I have them set at 58psi & 70psi. But most important, accurately record your SH at the compressor to determine...
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    Colnago, what you explained in your 1st post does...

    Colnago, what you explained in your 1st post does not reason. You checked something wrong or you are using a faulty meter with faulty leads. If you truly had an open fuse on a 3p circuit, you...
  7. United Refrigeration carries an entire line of...

    United Refrigeration carries an entire line of R22/R407C medium temp replacement equipment
  8. Walk in cooler, Replace equipment using R407C or R404A?

    I need order a new Trenton condensing unit along with the new evaporator this week Basically replacing everything but the box. I converted to R404A with good success in the past when I was a field...
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    Ideal meters are for amateurs. Not saying they...

    Ideal meters are for amateurs. Not saying they are not tough or dependable. Just not a Fluke. Buy the Fluke if you will use it everyday. The Fluke 87 is big. Great meter but overkill. The Fluke...
  10. Thread: Unloader settings

    by Capz
    Replies
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    605

    Unloaders are also used to prevent compressor...

    Unloaders are also used to prevent compressor motors from having to shutdown and start back up again in short notice in order to cut back on the electrical demands WHEN & IF POSSIBLE. Other words,...
  11. Replies
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    1,192

    How exactly did they tell you to test for a...

    How exactly did they tell you to test for a partially blocked cap tube?



    My thoughts....you have a partially blocked cap tube. You should be seeing higher suction pressures as the box warms...
  12. Is this a hot water system? How are you making...

    Is this a hot water system? How are you making heat? Hot water? Electric heating elements at each VAV? Steam or hot water in the air handlers air handlers? Tube bundles and hot water circulation...
  13. The door frame will be warm to the touch maybe...

    The door frame will be warm to the touch maybe 120F. Frame Heaters are so many watts per ft. I don't recall how many watts per ft is standard. Check with the supplier.

    If you are melting a...
  14. Thread: 1st service call

    by Capz
    Replies
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    10,437

    I've worked residential, commercial and currently...

    I've worked residential, commercial and currently hvac facilities in a large hospital. The in house work is by far the most difficult. For those guys telling you how difficult residential work...
  15. Thread: Wire Nut Twisting

    by Capz
    Replies
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    2,493

    Speaking of wire nuts....do hvac guys ever use...

    Speaking of wire nuts....do hvac guys ever use the proper size? All I see out there are orange nuts all the way down to #22 t-wire. Guys need to carry gray & blue wire nuts for the light stuff. ...
  16. Googizzo is the customer.....trying to figure out...

    Googizzo is the customer.....trying to figure out if he can get some free repairs.....
  17. So...let's take the rail out of the equation for...

    So...let's take the rail out of the equation for now as it has its own solenoid & control. Problem...The evaps are icing. Which is caused by a few things. One: the compressor is running too long,...
  18. Replies
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    How would anyone with enough knowledge to install...

    How would anyone with enough knowledge to install such a rat trap ever think it would work?
  19. Replies
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    1,546

    My tip for brazing sight glasses & filter dryers,...

    My tip for brazing sight glasses & filter dryers, use 45% silver & flux. And use oxy/ace if you have it. 45% uses less heat than does 15%.. The sharp hot flame from an oxy/ace pinpoints the heat...
  20. VFD's have axial fans. Are they working? I've...

    VFD's have axial fans. Are they working? I've seen bad fans cause units to overheat along with dust buildup on the heat sinks.
  21. Replies
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    1,792

    Your numbers do sound good. Go with the timer....

    Your numbers do sound good. Go with the timer. You can't fix employees keeping doors open too long.
  22. Replies
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    1,792

    I would have a minimum of 2 periods 30 mins each....

    I would have a minimum of 2 periods 30 mins each. I have used 3 periods for older units with poor insulation in humid weather. Why are your temps set so high? Is this for beverage only? You...
  23. Thread: R-12 Manifold

    by Capz
    Replies
    12
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    677

    I still use R12/R22/R502 high quality brass YJ...

    I still use R12/R22/R502 high quality brass YJ gauges on my YJ manifold. And I use liquid filled stubby R12/R22/R502 for much of my troubleshooting & repair work. But if you intend on working on...
  24. Replies
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    1,792

    You need two if not three thaw periods 8 or 12...

    You need two if not three thaw periods 8 or 12 hrs apart. I'd recondmend three. I do have one more thought, be sure your temperature controller is properly cycling as not to have the refer unit...
  25. Thread: Megger Readings.

    by Capz
    Replies
    22
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    1,241

    So, you meg small motors for the sake of good...

    So, you meg small motors for the sake of good practice? Unless the motor is tripping breakers I see no reason. And 125M ohms is not a show stopper.

    Some meggers have an on/off switch. You...
  26. Thread: Megger Readings.

    by Capz
    Replies
    22
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    1,241

    What made you to meg out the a relatively small 5...

    What made you to meg out the a relatively small 5 ton compressor in the first place?
  27. A PM takes what it takes. If the previous repair...

    A PM takes what it takes. If the previous repair work was not done correctly, am I going to leave it that way? So much older equipment has been repaired so many times with inadequet parts and...
  28. Replies
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    What exactly are the purposes for the adjustable...

    What exactly are the purposes for the adjustable pulley sheave on the motor?
  29. Thread: trane rtu

    by Capz
    Replies
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    1,332

    I'd advise a qualified electrician or AC service...

    I'd advise a qualified electrician or AC service company.
  30. Replies
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    Timebuilder, why would you need to swap the...

    Timebuilder, why would you need to swap the compressors? Unless the combined unit has a hot gas defrost on Stage 2 only, I would think you could permanently swap the wiring. But I'd be sure to draw...
  31. Replies
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    Water boils at 69F at 18,288 microns, and at 2000...

    Water boils at 69F at 18,288 microns, and at 2000 microns water will boil off at 15F. You want guess at what temp water will boil at 500mi?

    Not saying I don't pressure test with 100 psi n2 before...
  32. Thread: Work Pants

    by Capz
    Replies
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    5,352

    I am not permitted to wear blue jeans. I prefer...

    I am not permitted to wear blue jeans. I prefer carpenter style jeans but are only available in blue jean or cardhart and dicky duck style material. 60/40 polyester is durable but way too hot. I...
  33. Thread: subcooling

    by Capz
    Replies
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    3,732

    And keep in mind, liquid is more dense than...

    And keep in mind, liquid is more dense than vapor, it's heavier. So...additional sub cooled liquid must be present in the system to push the liquid up hill or to elevate it to an evaporator that may...
  34. Thread: subcooling

    by Capz
    Replies
    74
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    3,732

    You can't have too much sub cooling unless we are...

    You can't have too much sub cooling unless we are referring to condensing units without receivers. But at some point the liquid will stabilize at the given temps and pressures. The liquid will only...
  35. Replies
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    I'd use new copper nipple & fittings to make the...

    I'd use new copper nipple & fittings to make the transition. Don't forget to use silver solder & flux on that new valve.
  36. Replies
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    Twist it or wiggle it.

    Twist it or wiggle it.
  37. Thread: Odd restriction

    by Capz
    Replies
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    2,653

    I'd measure temps of condenser inlet, mid area,...

    I'd measure temps of condenser inlet, mid area, outlet for gradual temp change. If you notice a rapid change of temp indicating flooded condenser from an overcharge, then I'd say still have a...
  38. Replies
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    Good work on that Kenmore and you should have...

    Good work on that Kenmore and you should have plenty of *winter* in charge that puppy. Not that it matters!
  39. Replies
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    2,509

    Possible still air in the system? Or a really...

    Possible still air in the system? Or a really cruddy condenser? How confident are you of your vacuum pump and hoses? What about the headmaster valve? Could it be bypassing the condenser? Is the...
  40. Thread: Odd restriction

    by Capz
    Replies
    60
    Views
    2,653

    Factory doesn't want to admit their cap tube...

    Factory doesn't want to admit their cap tube units can plug. You will have this unit working like new after you go back with the new cap tube and recharge. I never had any luck cutting back a few...
  41. Replies
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    Head psi is high cause your load is high. Look...

    Head psi is high cause your load is high. Look at your suction pressure, should be 10F colder. And it could it be overcharged?
    Check Superheat too as mentioned.
  42. Thanks too Ice. I didn't answer that question...

    Thanks too Ice. I didn't answer that question quite correctly!
  43. Replies
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    2,171

    She's either loaded up due to a defrost circuit...

    She's either loaded up due to a defrost circuit heating or an overcharge condition. Unplug the heater and try it before installing that tap.
  44. Replies
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    620

    I tried to go lower to 55psi but my SH drops...

    I tried to go lower to 55psi but my SH drops rapidly closer to 10 F. and lower at the compressor. Not sure I wanted to push the envelope.
  45. Replies
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    5,153

    One time I was wiring up a smaller commercial...

    One time I was wiring up a smaller commercial walk in cooler. Another tech had installed it. The cooler called for a 230v 1p. He had installed a 115v compressor. Sparks everywhere! I didn't need...
  46. Replies
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    5,153

    Make double sure you have the Run & Start wires...

    Make double sure you have the Run & Start wires correct at the compressor. If flipped flopped.......
  47. Medium temp. 34F-40F. Sporlan uses this term in...

    Medium temp. 34F-40F. Sporlan uses this term in regards to TEV's
  48. Hey, little late adding my .02 cents here. I...

    Hey, little late adding my .02 cents here. I worked on many old R12 units all running R409A with good results I may add. I experimented with R134 condensing units with marginal at best results. I...
  49. Replies
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    620

    Unloader valve settings?

    I have a custom built 2 stage compressor AC unit cooling (3) OR rooms. 400,000 btu, I think? It's the size of a boxcar!
    (2) Copeland 4DK3A2500 compressors, 55F discharge temps at the blower before...
  50. Replies
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    5,153

    Obviously a wiring issue.

    Obviously a wiring issue.
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