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  1. Replies
    4
    Views
    3,856

    My co-workers abd I are experiencing a large...

    My co-workers abd I are experiencing a large amount of enthalpy sensor failures in these Honeywell economizer systems. Disconnecting the sensor will force the economizer to mech cooling mode and...
  2. Thread: york rooftop

    by BFG6868
    Replies
    6
    Views
    1,207

    W1 will not energize the fan control circuit (G)...

    W1 will not energize the fan control circuit (G) through the tsat unless the tsat is a newer electronic type and the tsat is set to energize the fan in heat mode. In that case the operating limit...
  3. Thread: Need a T-stat

    by BFG6868
    Replies
    6
    Views
    597

    Honeywell had doulble sensor available for the...

    Honeywell had doulble sensor available for the T7300 series stat. the sensor actualy had two thermistors on it. Yow would wire two of these double sensors back to the t7300 in a series agangement. ...
  4. Replies
    9
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    935

    I have seen carlyle compressors running rough...

    I have seen carlyle compressors running rough with a slightly bent cranks after a liquid slug. I have noticed this on Carrier 50PQ016 heat pumps. After running like this for a while it would cause...
  5. Replies
    10
    Views
    1,112

    You are going to have to call them to price the...

    You are going to have to call them to price the equipment anyway so I would call them and ask questions now. Where I come from the mitsu dealer are training and selling to all the reputable A/C...
  6. Replies
    24
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    2,452

    oscillating sprinkler on a water regulating valve.

    oscillating sprinkler on a water regulating valve.
  7. Replies
    4
    Views
    1,746

    I have serviced this type of sytem before in a...

    I have serviced this type of sytem before in a mining camp way up north. They were using a DDC sytem with an analog differential pressure transducer that sensed the pressure across metal snow...
  8. Replies
    11
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    1,549

    I agree with Libert Tech. You should not use an...

    I agree with Libert Tech. You should not use an economizer in your room a data room since it will over dehumify the room in the winter. Depending on the amout of fresh air and the outdoor air...
  9. Replies
    36
    Views
    3,148

    If you wear a dust mask it maybe better. You...

    If you wear a dust mask it maybe better. You will get use to it after a while. I also have an electronics diploma. I stuck with it now I get to service and install HVAC and DDC controls and I love...
  10. Replies
    20
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    3,456

    Disconnect the wires from the compressor...

    Disconnect the wires from the compressor terminals and check there to rule out an external wiring or contactor problem. I would bet the compressor is toast.
  11. Replies
    4
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    1,284

    Use the O terminal and an outdoor thermostat...

    Use the O terminal and an outdoor thermostat wired through close on drop to energize a relay. If it is cool out and O terminal is energizered (cooling Call) allow the econo to work through the N.O....
  12. Replies
    10
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    2,466

    The service manual does not have a lockout code...

    The service manual does not have a lockout code for 1 but it does mention something about the high limit tripping before the fan on delay time has allowed the evap fan to start. See the cut and...
  13. I checked the lennox docs. if it was a 13,000...

    I checked the lennox docs. if it was a 13,000 btu model the model number should be CGS16-013. so I think there is a typo in the model number or it was written down correctly. why don't you get the...
  14. Replies
    22
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    7,900

    since this is a replacement compressor the...

    since this is a replacement compressor the Rotation may be wrong even if the other compressor is correct.
  15. Thread: York B36H

    by BFG6868
    Replies
    3
    Views
    974

    Are you sure is not B3CH036 and B3CH060. If it...

    Are you sure is not B3CH036 and B3CH060. If it is, It looks like three ton and five ton heat pumps. I had a quick look at the york web site but could find a literature search. I would contact your...
  16. Replies
    3
    Views
    569

    i have used those universal belts when i could...

    i have used those universal belts when i could not source a replacement belt in the past. I don't know the exact part number but they can be made as large as you need buy linking in more belt...
  17. Replies
    26
    Views
    1,404

    I worked on a Carrier ductless split system last...

    I worked on a Carrier ductless split system last week that was made in China. Is Carrier Just buying these units and retagging them or does Carrier have a factory in China.
  18. Replies
    27
    Views
    14,883

    If this computer room has a raised floor you can...

    If this computer room has a raised floor you can also try relocating the floor panels that are floor grills as far away from the unit as possible to minimize short circuiting of air.
  19. Replies
    12
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    1,215

    When you disconnect the enthalpy sensor does the...

    When you disconnect the enthalpy sensor does the economizer dampers close? if so chances are the enthalpy sensor has failed. We are experiencing alot of failures with these enthalpy sensors. I...
  20. Replies
    38
    Views
    3,459

    Check the amp draw while the breaker trips. You...

    Check the amp draw while the breaker trips. You may have a weaK or faulty Breaker.
  21. Replies
    8
    Views
    3,584

    I returned to the job site today and found the...

    I returned to the job site today and found the problem. The controls contrator had modified the electric heater in these units to incorperate SCR modulation. In doing so they disconnected the...
  22. Replies
    8
    Views
    3,584

    all the safetys are closed execpt the low ambient...

    all the safetys are closed execpt the low ambient that opens high.. the board should flash a code if a safety should trip. I am going to go back to site tommorow and check to see if any of the...
  23. Replies
    8
    Views
    3,584

    the economizer is closed. I made sure buy...

    the economizer is closed. I made sure buy disconnecting the enthalpy sensor to keep the unit mech cool mode. i also have power on the Y1-econo input on the simplicity board. y1 -econo will be...
  24. Replies
    8
    Views
    3,584

    70F OAT. The simplicity board should indicate if...

    70F OAT. The simplicity board should indicate if the compressors are out on low ambient (LAS). I verified that the low ambient switch was open ( Spec on wiring diagram says open at 55 close at 45)....
  25. Replies
    8
    Views
    3,584

    York predator m# DM150 simplicity Board

    I am having trouble with a couple of DM 150s on one of my jobsites. I have a two stage call for cooling but none of the two compressor contactors or condensor fan contactor will operate (except when...
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