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  1. Replies
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    828

    I have heard the same thing but not sure what you...

    I have heard the same thing but not sure what you mean contaminated compressors.
  2. Sure just use the tstat multi control type.

    Sure just use the tstat multi control type.
  3. Replies
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    490

    What kind of failure are you seeing ? Inquiring...

    What kind of failure are you seeing ? Inquiring minds want to know.
  4. Replies
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    374

    We'll a restriction would give you some higher...

    We'll a restriction would give you some higher SH. Maybe your TXV's a little oversized or now enough load on your evaporator ?

    Plus I think it's a 38APD.
  5. Replies
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    981

    When I had an issue like this there was a...

    When I had an issue like this there was a removable screen/strainer where the sock attached to the AHU. It was plugged up. I took it out and cleaned it a problem solved. Just something else to check.
  6. Replies
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    1,197

    Fixed orifice.

    Fixed orifice.
  7. Replies
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    1,197

    Hate to say it but I would have changed the drier...

    Hate to say it but I would have changed the drier while you had it pumped out just to be sure.
  8. My gues is that the AHU was probably matched with...

    My gues is that the AHU was probably matched with a McQuay 2 speed compressor . It probably matched the coil staging. Your stuck running all or nothing, maybe add some hot gas if possible.
  9. Have you tried disabling the digital scroll to...

    Have you tried disabling the digital scroll to see if that helps ?
  10. Replies
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    622

    Just to add. I can see a possible issue if that...

    Just to add. I can see a possible issue if that condensing temp doesn't rise with that resistor on there.

    Alert Codes 143, 144, 145 (Failure to Pressurize) — Alert codes 143, 144, and 145 are for...
  11. Replies
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    622

    Did you verify that the SCT sensor for circuit C...

    Did you verify that the SCT sensor for circuit C was not broken and just hanging in the air. It's supposed to clamp on to the condenser coil.
  12. Replies
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    357

    If he offered up as much information to the...

    If he offered up as much information to the counter guy that he did here I can see why he didn't get an answer.
  13. Replies
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    575

    Definitely not worth it plus I don't think VAV is...

    Definitely not worth it plus I don't think VAV is allowed for residential here . Gonna need fire dampers and other safety devices plus with a common return your going to get cross contamination (...
  14. Makes sense now as to why you were reading the...

    Makes sense now as to why you were reading the high DP. Just sounds like your system was low on water, depending on the makeup type there could be a strainer in there too.
  15. Is there a pump package on this chiller or is the...

    Is there a pump package on this chiller or is the pump external of the chiller ?
  16. Yep clear as mud.

    Yep clear as mud.
  17. There are actually (6) different combinations of...

    There are actually (6) different combinations of condenser fan motors that can go on that chiller the serial number will tell the parts guys what you need? You will also need to know what Motor...
  18. Replies
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    609

    If that's the case you could always upgrade it to...

    If that's the case you could always upgrade it to the motor master 5 if price is not a problem.I have never heard of a timing issue if that was the case a time delay relay could be thrown in there.
    ...
  19. Replies
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    609

    The wiring diagram shows an aux contact to keep...

    The wiring diagram shows an aux contact to keep the low and high speed contactors pulling in at the same time .
  20. Replies
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    609

    Can you duplicate this using test mode ?

    Can you duplicate this using test mode ?
  21. Replies
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    609

    Is you auxiliary contact on your high speed...

    Is you auxiliary contact on your high speed contactor working properly ?
  22. I would say it's pretty recent but what you have...

    I would say it's pretty recent but what you have there is the compressor serial number and not the actual chiller model and serial number. My guess is that it's a 19 series chiller.
  23. What kind of unit?

    What kind of unit?
  24. NSTV is not going to download to an EXV driver...

    NSTV is not going to download to an EXV driver board the only benefit you will have is to see the EXV maintenance tables. What type of chiller are you working on there?
  25. Replies
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    406

    I think hvac69 may have fixed it for you Joe did...

    I think hvac69 may have fixed it for you Joe did tech although it sounds like you may have 3rd party controls on your unit. Your unit does have a DP switch which does have the ability to monitor fan...
  26. Replies
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    1,243

    You are correct so I read it wrong. Now I see the...

    You are correct so I read it wrong. Now I see the 50hz info below in bold lettering .
  27. Replies
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    Why not put a loss of charge switch on the high...

    Why not put a loss of charge switch on the high side of the system?
  28. Replies
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    1,243

    Defiantly a 3 HP motor at 208/230 volts. There is...

    Defiantly a 3 HP motor at 208/230 volts. There is only a .2 amp difference between the low and high end of the 208-230 volt range so minimal horse power loss.
  29. I started thinking about this a little bit more....

    I started thinking about this a little bit more. Is this installation going to pay itself off in 5- years? In 5 a years if the chillers are going to be replaced I would be hard pressed to see what...
  30. This seems typical of a company like AT&T they...

    This seems typical of a company like AT&T they are on the energy kick with systems like this and other products like evapacool. I think they have also installed electricity producing windmills over...
  31. Thread: EEV

    by Dallas Duster
    Replies
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    1,228

    That looks like an 11 ton valve to me. ...

    That looks like an 11 ton valve to me.
  32. Replies
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    679

    Boy ain't that the truth.

    Boy ain't that the truth.
  33. Replies
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    564

    The sensor on the leaving or entering side is...

    The sensor on the leaving or entering side is floating in or out of range sounds like one is bad. Not miswired.
  34. Replies
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    Accutrol is the name it's there a LLS also in...

    Accutrol is the name it's there a LLS also in there ahead of the evap coil ?
  35. Replies
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    3,011

    It could be a piston metering device does it have...

    It could be a piston metering device does it have a semi hermetic compressor or scroll?
  36. Replies
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    648

    Yeah I'm thinking it is a check valve for a heat...

    Yeah I'm thinking it is a check valve for a heat pump too.
  37. Replies
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    1,348

    Winner winner chicken dinner I think you are...

    Winner winner chicken dinner I think you are saying you need a bleed port TXV.
  38. Replies
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    3,140

    Because he said it was a brand new unit.

    Because he said it was a brand new unit.
  39. Replies
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    Do a site search here and you will find it.

    Do a site search here and you will find it.
  40. Replies
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    That's all it is its a mechanical device that...

    That's all it is its a mechanical device that stops the compressor from pumping momentarily. The compressor motor never stops turning a constant speed.
  41. Lots of wants there do you have any needs?

    Lots of wants there do you have any needs?
  42. Thread: 38aks016

    by Dallas Duster
    Replies
    6
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    658

    Yep guess its cheaper to use (2) smaller...

    Yep guess its cheaper to use (2) smaller contactors than (1) big one plus it could be to size limitations.
  43. Thread: 38aks016

    by Dallas Duster
    Replies
    6
    Views
    658

    The contactors are wired for part winding start...

    The contactors are wired for part winding start but there is no timer they just pull in together. The unloaders are mechanical the IOM will have some information about the operation and setup.
  44. Replies
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    1,006

    Or this way. The pilot valve on the equalizer...

    Or this way. The pilot valve on the equalizer line.

    http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/30g,h_38a-2si.pdf
  45. Replies
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    1,006

    Is that even possible what if you don't have a...

    Is that even possible what if you don't have a MLV on the circuit?
  46. Replies
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    1,006

    Nope a plane ole TXV . What's going to happen to...

    Nope a plane ole TXV . What's going to happen to the TXV if we turn the equalizer off to it?
  47. Replies
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    1,006

    Would you give me the same answer for a TXV? For...

    Would you give me the same answer for a TXV? For capacity control in multiple TXV applications coil?
  48. Replies
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    1,006

    To turn the HGBP off would be my guess.

    To turn the HGBP off would be my guess.
  49. Did you measure the correct 25 ohms on the EXV...

    Did you measure the correct 25 ohms on the EXV from the connector pulled off the mother boards? This way you are testing the exv cable and the motor.

    There is a exv valve voltage output test in...
  50. Post a good log of pressures and temps on water...

    Post a good log of pressures and temps on water and refrigerant side and I am confident someone here can help you solve it.
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