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Type: Posts; User: BFG6868

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  1. Replies
    4
    Views
    4,038

    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
    1,253

    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
    634

    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
    Views
    954

    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
    1,172

    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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    2,537

    oscillating sprinkler on a water regulating valve.

    oscillating sprinkler on a water regulating valve.
  7. Replies
    4
    Views
    1,800

    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
    Views
    1,624

    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
    3,311

    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
    Views
    3,656

    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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    1,343

    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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    2,603

    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
    Views
    8,240

    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
    1,019

    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
    589

    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
    1,512

    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
    15,889

    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
    Views
    1,289

    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
    3,643

    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
    3,716

    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
    3,716

    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
    3,716

    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
    3,716

    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
    3,716

    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...
  26. Replies
    18
    Views
    1,066

    I would have your controls contractor verify that...

    I would have your controls contractor verify that the Cw valvles and the Heating valves are not fighting each other. I am willing to bet that your cooling loads will decrease signifigantly if you...
  27. Replies
    7
    Views
    2,806

    I went back to the site this morning to have...

    I went back to the site this morning to have another look and managed to find the problem. The wiring between the mixed air sensor and the economizer board was open. The unit will disable the...
  28. Replies
    7
    Views
    2,806

    The unit has a mixed air sensor that is connected...

    The unit has a mixed air sensor that is connected to the economizer board and an outdoor air sensor connected to the main control board. yes, it works in test mode.

    Thanks
  29. Replies
    7
    Views
    2,806

    It was about 40F today therfore it should be much...

    It was about 40F today therfore it should be much greater than 10k with a ntc thermistor.
  30. Replies
    7
    Views
    2,806

    Trane Voyager tch150 Economizer problem

    I am having trouble trying to get a trane tch150 to go into economizer Mode. The unit will only run in Mechanical cooling. So far I have replaced the main control Board(UCM), the Econmizer Control...
  31. Replies
    2
    Views
    444

    If the charge is good it may be you TXV on the...

    If the charge is good it may be you TXV on the indoor coil
  32. Replies
    6
    Views
    759

    As a service tech in this business you will be...

    As a service tech in this business you will be expected to service equipment that you have never seen before on a regular basis. Use the internet to your advantage to download service manuals. Read,...
  33. Replies
    2
    Views
    534

    I am assuming you are talking about the Nortec...

    I am assuming you are talking about the Nortec humidifiers with the plastic dispaosable canisters with 500 - 2000 operating hour life. Nortec, Dristeem and other manufacturers have humidifiers with...
  34. I live in eastern Canada and we never cool...

    I live in eastern Canada and we never cool computer rooms using economizers. The cool outside air will severley drop the RH in the computer room. We usually install expensive computer room AC...
  35. Replies
    3
    Views
    446

    Make sure you refergerant charge is correct.

    Make sure you refergerant charge is correct.
  36. Replies
    56
    Views
    10,596

    I live in eastern canada and it is not uncommon...

    I live in eastern canada and it is not uncommon to gas regulators freezing in the winter season. As proof, while on site, I can thaw the regulator by pouring some warm water over it, being carefull...
  37. Thread: Blowing fuses

    by BFG6868
    Replies
    22
    Views
    1,765

    Make sure the fuses are time delay not fast...

    Make sure the fuses are time delay not fast acting. Megger the Crank case Heaters.
  38. Replies
    56
    Views
    10,596

    I think Jonyfive is right the Gas regs are...

    I think Jonyfive is right the Gas regs are intermittently sticking or icing up causing the ignition lockout. If they are freezing up they tend to work fine in the Day when the sun is on them but...
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