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Type: Posts; User: airworx

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  1. Thread: Alerton

    by airworx
    Replies
    1
    Views
    483

    Alerton

    What kohm does alerton use on thier sensors. I have an old alerton system ( about 20 yrs old ) We just picked up this account and we are not a alerton dealer. Sensor with slider 3 wire
  2. Replies
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    8,210

    broken valves, flooding, is it suction cutoff or...

    broken valves, flooding, is it suction cutoff or discharge bypass ( unloaders )
    low suction. just some ideas.
  3. Replies
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    483

    Thank You.

    Thank You.
  4. Replies
    2
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    483

    Reliable Controls

    Need info on upgrading the firmware for mach2 controller. I have the upgrade download. Thanks
  5. Replies
    0
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    355

    Reliable Controls

    Need infor on upgrading the firmware for mach2 controller. I have the upgrade download. Thanks
  6. Replies
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    610

    If you have an automatic bleed control then make...

    If you have an automatic bleed control then make sure it functions properly, then adjust the length of the on time, and maybe shorten the time between bleeds. If you do not have one then install one.
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    610

    Do you have an automatic bleed control on the...

    Do you have an automatic bleed control on the tank.
  8. Thread: Canatel

    by airworx
    Replies
    2
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    907

    I have worked on a few in some buildings downtown...

    I have worked on a few in some buildings downtown fort worth. Other than that no.
  9. Replies
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    937

    I would check the water temp sensors then I would...

    I would check the water temp sensors then I would check the control setpoint, check the water flow through your cooler, you should have a minimum of a 4# drop across barrell also check the temp...
  10. Thread: RTAA QUESTION

    by airworx
    Replies
    55
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    3,122

    16 degree drop across barrell means you don,t...

    16 degree drop across barrell means you don,t have enough water flow. This will cause low superheat. I would check your strainer, pump and any control valves you may have.
    Now make sure when you...
  11. Thread: RTAA QUESTION

    by airworx
    Replies
    55
    Views
    3,122

    low superheat would not indicate a low charge, if...

    low superheat would not indicate a low charge, if there is a solenoid valve or drier and it is sweating downstream this could be your problem. The only sure way to troubleshoot this problem is to...
  12. defrost should be initiated on time and...

    defrost should be initiated on time and temperture. There is a defrost time set point on defrost boards you may want him to move the time up. Generally defrost is initiated every 30,60 or 90 minutes...
  13. Replies
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    5,596

    yes voltages will fluctuate from o to 3.9 vdc....

    yes voltages will fluctuate from o to 3.9 vdc. exv's produce a tighter control and improves efficiency. But whatever.
  14. Replies
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    5,596

    Correct. If voltages does not fluctuate or stays...

    Correct. If voltages does not fluctuate or stays at zero check processor.
    If voltage fluctuate then ohm check exv then open up exv and check to see if orfice is scared or will not slide easily.
  15. what is water temp in and out of cooler

    what is water temp in and out of cooler
  16. Replies
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    487

    stat senses coil temp and tells board to go into...

    stat senses coil temp and tells board to go into defrost, if enough time has passed between defrosts the board will go into defrost. by jumping the test pins you verified board operation so stat...
  17. Replies
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    1,311

    I would check the sensors for accuracy first....

    I would check the sensors for accuracy first. Then I would check water flow.
    No.1 thats to much of a drop, it shows theres not enough waterflow.
    Another thing is the superheat is vary low which is...
  18. Thread: Trane TWA090

    by airworx
    Replies
    6
    Views
    1,885

    I would check the defrost temp sensor. I cannot...

    I would check the defrost temp sensor. I cannot remember if it is normally closed or open circuit so disconnect one lead from the sensor and energize defrost mode, or jumper the stat and energize...
  19. Replies
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    931

    order a new compressor. only differance between...

    order a new compressor. only differance between us and you would be the shipping cost. or you could call the compressor manufacturer and get some literature on repairing that paticular compressor,...
  20. Thread: Duct Sizes

    by airworx
    Replies
    5
    Views
    2,231

    DUCT

    a 7.5 ton unit will move around 3000 cfm depends on unit and return air.
    you will need somewhere around 3000 cfm of duct.
    now we will use flex and this is just a general idea.
    a 10" duct is rated...
  21. crisp

    unscrew it and open it up. then turn on remote/local switch, turn breaker for that compressor(s) so they don't start and see if the valve modulates up and down. on start up the valve will fully open...
  22. Replies
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    402

    rc studio

    you can goto www.reliablecontrols.com they have a list of dealers. remember the newer kmd controls do not work with reliable. only the older stuff, so i would make sure
  23. crisp

    90% of the time you have an out of calibration thermistor, that is where i would start, ohm check the exv and test for correct voltage to exv then i would pump down the unit and open up exv, turn...
  24. Replies
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    1,117

    The logical thing to do is pray. This is always...

    The logical thing to do is pray. This is always the first thing to do.
  25. Replies
    6
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    685

    is the motor driven by a freq. drive or is it a...

    is the motor driven by a freq. drive or is it a residential unit.
  26. Replies
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    922

    should not be a problem. its done all the time.

    should not be a problem. its done all the time.
  27. Replies
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    714

    compressor usually fail because of flooding.

    compressor usually fail because of flooding.
  28. get your control contractor to avg all the zones,...

    get your control contractor to avg all the zones, if a majority of the zones are calling then the pumps would come on and if not then pumps are off.
    then you could program the boiler only to run if...
  29. Replies
    4
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    1,883

    put filter in before controller. I cannot...

    put filter in before controller. I cannot remember what they are called but they help remover moisture and debrie. They are clear plastic with white filter media on the inside
  30. Replies
    19
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    1,504

    glue ?

    super glue. soap solution to keep the gasket from rolling as you tighten.
  31. Thread: JCI

    by airworx
    Replies
    40
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    4,161

    unoin

    our union does not pay double time. the problem is your opinion means nothing. get the facts before you open ol bigun.
  32. york

    the motor sensors that embedded in the windings could be out of cal.
    check the start amps
    check actual amp draw versus fla read out on display
    is this wye delta or across the line start.
    check...
  33. Replies
    153
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    38,739

    No signal to capacity control

    If the processor senses full load amps when 0 steps or unloaded then the processor will not allow compressor to load. Need to check the capacity control valve
  34. Thread: TXV question

    by airworx
    Replies
    10
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    776

    probalby overcharged. you need to take subcooling...

    probalby overcharged. you need to take subcooling and superheat readings for a good diagnosis.

    best thing to do is take a clean recovery drum and dump most of the refigerant into it. then charge...
  35. Replies
    2
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    967

    check the microprocessor. I was working on a...

    check the microprocessor. I was working on a ycas033. Power supply was giving me +12 volts but I was not getting a rs232 signal and micro was only putting out 3.5 vdc instead of 5 vdc.

    Also check...
  36. Replies
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    912

    more than likely he is talking about the...

    more than likely he is talking about the condenser fans or chillwater pump.
  37. Replies
    4
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    754

    sorry not to get back, been busy. microprocessor...

    sorry not to get back, been busy. microprocessor bad.

    thanks guys.
  38. Thread: O6E Troubles

    by airworx
    Replies
    11
    Views
    1,409

    you could have a broken rod or valve hence the...

    you could have a broken rod or valve hence the high suction and low oil pressure. i would pull the heads and check. another possiblity is the capacity control unit is bad or unloader has some issues.
  39. Thread: 30HL

    by airworx
    Replies
    26
    Views
    3,354

    might check to see if the valve is install wrong....

    might check to see if the valve is install wrong. what i means is, if the valve is install backwards it will not bypass it wil stop flow.
  40. Replies
    1
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    514

    yes, in control basics you would take which ever...

    yes, in control basics you would take which ever variable the set point is and write in if (varible number that corresponds to setpoint we will say 2 ) var2 is > or < (the normal setpoint say 75) for...
  41. Replies
    4
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    754

    Thats what Ive come down to is the power supply...

    Thats what Ive come down to is the power supply board or micro processor.
    I am going back to recheck to the power board.

    Hey thanks for your reply.
  42. Replies
    4
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    754

    York YACS033 Screw Chiller

    I don't have any display readings except for squares black in along the top of screen.

    radiator extremly hot. No rs485 signal from i/o board 2, Power board give 12
    vdc unplugged and 3.5 vdc...
  43. Replies
    17
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    2,422

    2 Zone

    bypass damper should be installed in the supply plenum just like the zone dampers.
    Also discharge air sensor also should be mounted in the supply plenum.
  44. you could have controls installed and operate the...

    you could have controls installed and operate the system correctly.
  45. Replies
    1
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    576

    york ycas044 chiller

    need wiring diagram and any other info. thanks guys
  46. Replies
    27
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    2,639

    18 degrees subcooling. That means your...

    18 degrees subcooling. That means your overcharged. Was this reading taken fully loaded, if not it not a valid number. You cannot charge with a unit unloaded.
  47. Replies
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    731

    Commercial Tech Needed

    Fort Worth Area, We cover fort worth and surrounding areas.
    We need people who have commercial hvac or refrigeration and we also need persons with experiance on chill and hot water systems.
    If any...
  48. Replies
    8
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    713

    I have only serviced one place where a schematic...

    I have only serviced one place where a schematic was available.
    Usually have to trace the wires and figure out whats going on.
    Use common sense aproach.
  49. Replies
    8
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    1,625

    Why would it be to cold to run a/c ?

    Why would it be to cold to run a/c ?
  50. Replies
    1
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    667

    Reliable Graphics

    Anyone have a good library of graphics for reliable controls.
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