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Type: Posts; User: ckartson

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  1. Replies
    26
    Views
    880

    It's not supply air because the heat ex is after...

    It's not supply air because the heat ex is after that sensor. It is mixed air sensor because as was mentioned it does control econo but also controls second stage cooling when energized. This is a...
  2. PHM it's good to see a post from you and that...

    PHM it's good to see a post from you and that one's a doozy:grin2: I hope everything's ok.
  3. Replies
    5
    Views
    311

    Roof Top Unit, heat and air

    Roof Top Unit, heat and air
  4. Replies
    26
    Views
    775

    David! Are you out there, did you get amp draws,...

    David! Are you out there, did you get amp draws, was it over amping and going off on internal overload or motor protector.
  5. Replies
    21
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    900

    I would have a pro look at it. It probably isn't...

    I would have a pro look at it. It probably isn't correct but need to see the outside termination also. Intake is supposed to be terminated above snow line but really you need to have a pro out there....
  6. Replies
    8
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    931

    You said the actuator is connected to an AO...

    You said the actuator is connected to an AO already. Also 24 v connected to actuator through a DO. Sounds to me as if the actuator is enabled by the DO and controlled by the AO. Was it a replacement...
  7. Replies
    7
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    531

    Bypass open.

    Bypass open.
  8. Replies
    732
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    136,985

    What was wrong?

    What was wrong?
  9. Replies
    10
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    451

    Ammoniadog, curious about what is detrimental...

    Ammoniadog, curious about what is detrimental about low amp draw? Also how low are you talking?
  10. Replies
    23
    Views
    1,355

    Outstanding job! When I worked on Trane equipment...

    Outstanding job! When I worked on Trane equipment for one company I had a resistance decade box. You exceeded that box. Only difference is the decade box could be used for other troubleshooting,...
  11. Replies
    27
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    1,592

    GenesisRefrig, I also remember filling Styrofoam...

    GenesisRefrig, I also remember filling Styrofoam cups we R 12 back before reclaim when people would ask for a little freezone because there car was a little low. They would walk away with a cup of...
  12. A large hospital in the Cleveland area requires...

    A large hospital in the Cleveland area requires an open ceiling permit if we have to remove a ceiling tile. They don't argue the bill even though it may be three or four times more due to the legwork
  13. You got half a diagnosis. The other half would...

    You got half a diagnosis. The other half would have been amp draws. This would tell if all elements were energized. I would get a service contractor out if I am serious about buying.
  14. Replies
    6
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    1,392

    Jogas, what #BV is keeping the fans on? Also if...

    Jogas, what #BV is keeping the fans on? Also if you think the wrong program was used look in Alerton standards for a parallel fan program. VAV box programs are usually selected from there.
  15. Replies
    62
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    1,893

    I think you mean co sensors correct?

    I think you mean co sensors correct?
  16. Replies
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    1,030

    To put this in perspective, the service person...

    To put this in perspective, the service person found a failed combustion motor and possible unreliable control board and did the right thing in suggesting replacement. The next step which he wouldn't...
  17. Do you have outside air ducted to the furnace's...

    Do you have outside air ducted to the furnace's return air for ventilation? If so an automatic damper should be installed. Are you running some sort of exhaust when this happens? Typically warm air...
  18. Replies
    10
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    511

    Please put hans back in pockets it's -7F...

    Please put hans back in pockets it's -7F here.:grin2:
  19. Replies
    10
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    511

    What is the little green box for

    What is the little green box for when hovered over say,"Standing around truck with hands in pockets" or something to that effect. I don't ever remember seeing that before
  20. Replies
    6
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    326

    Just one more thing to add to HVAC69's excellent...

    Just one more thing to add to HVAC69's excellent explanation, if this is controlled by a DDC controller or any controller for that matter two binary outputs are needed. One for open and one for close.
  21. Replies
    8
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    474

    any change of a diagram. Are you running a...

    any change of a diagram. Are you running a primary loop from boiler to tank and back and another loop to zone?
  22. Replies
    11
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    907

    I recently ended up replacing a speed control and...

    I recently ended up replacing a speed control and combustion motor for th same reason. Combustion fan was running to slow. Also had terrible smelling flue gasses. Obviously check heat exchanger...
  23. Fuses protect the conductors. wires are sized per...

    Fuses protect the conductors. wires are sized per amperage and fuses stop current if value is exceeded. Fuses aren't always used to protect a device. Some smaller control fuses do protect an...
  24. Replies
    6
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    410

    Cheap way, Supply 55f to 65f from RTU based on...

    Cheap way, Supply 55f to 65f from RTU based on OA temp and provide electric zone reheat for each zone. Reheats are duct mounted. Can be modulating. I don't think VVT will work well with that many...
  25. Replies
    50
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    2,791

    Whether the trans has a grounded secondary or not...

    Whether the trans has a grounded secondary or not you should still see 24 vac across the secondary. Or read from R to C on the terminal strip.
  26. Replies
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    1,423

    That makes no sense. Sequencers fail and can be...

    That makes no sense. Sequencers fail and can be replaced. Many companies work on electric heat. If the equipment has been drastically redesigned then maybe no one wants the responsibility.
  27. Replies
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    942

    I have seen similar480v 3 phase heater package on...

    I have seen similar480v 3 phase heater package on a singe phase 230 v carrier resi ahu. They sold a single point power package which contained a 480 to 240 transformer to power the furnace fan and...
  28. Replies
    10
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    655

    What is the humidity in the space? What is the...

    What is the humidity in the space? What is the cold surface temperature? Indoor dewpoint must be above cold surface temperature or condensation will result. What is the source of humidity?
  29. It's interesting that you did that. Many of use...

    It's interesting that you did that. Many of use don't time, time delays that are working. Maybe there is a component failing on the control board but it is not something that at a technician level we...
  30. Thread: help?

    by ckartson
    Replies
    19
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    878

    My point exactly, Thanks for saying it clearly.

    My point exactly, Thanks for saying it clearly.
  31. Thread: help?

    by ckartson
    Replies
    19
    Views
    878

    What parts are you missing? you should need...

    What parts are you missing? you should need control wire, power wire, acr pipe, armaflex insulation, special Y fittings.
  32. I looked up the wiring diagram for your furnace...

    I looked up the wiring diagram for your furnace and see the note 7 that you are referring to. The jumper will allow the fan to run at a higher speed when the stat is set to fan on. Depending on duct...
  33. You stated you have no ac. Don't connect the...

    You stated you have no ac. Don't connect the jumper. Connecting the jumper G term= fan, Y/Y2=cool stage 1 or cool stage 2 will energize fan on a call for cooling or energize cooling when tstat is set...
  34. Thread: Cooling Off

    by ckartson
    Replies
    60
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    4,415

    Wha tev?

    Wha tev?
  35. Replies
    27
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    1,692

    Either should close quickly. Freeze stats should...

    Either should close quickly. Freeze stats should be hard wired to provide immediate closure to power to damper actuator or to ep for pneumatic actuator. Not closing completely is a problem with both...
  36. Thread: Torpedo level

    by ckartson
    Replies
    9
    Views
    597

    Try goggling "bubble" from your phone. Its pretty...

    Try goggling "bubble" from your phone. Its pretty cool. Ok for a quick small level if it fits. Wouldn't pipe up a hole building with it.
  37. Replies
    16
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    990

    I use a tree with the two valves on it. After I...

    I use a tree with the two valves on it. After I am assured of proper micron level I valve off both valves of my tree. I install my manifold to the center isolated port of my tree. Attach yellow...
  38. Replies
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    5,015

    Condensor is to clean.

    Condensor is to clean.
  39. Replies
    64
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    2,561

    Many guys may be sucked in by that "trick...

    Many guys may be sucked in by that "trick question" but if the same guys walked on a job and saw a flue connected to an electric furnace they would probably not be tricked. It would be posted in the...
  40. Replies
    9
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    1,114

    Check or replace all electrical connections,...

    Check or replace all electrical connections, dirty or poor connections on a MV system will cause this. Test the valve with a flashlight battery.
  41. Replies
    72
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    6,877

    Even older standing pilot furnaces did that. Fan...

    Even older standing pilot furnaces did that. Fan switch sensed heat exchanger temp after burner shut down. Fan ran 1 or 2 minutes letting heat exchange cool down. A high % of systems do.
  42. Replies
    15
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    772

    What beenthere said. He means that if you can get...

    What beenthere said. He means that if you can get a two stage with a low fire of 40k but a single stage of 60k min it is probably worth getting the two stage. This is after loadcalc of course.
  43. Replies
    7
    Views
    538

    Many drives have PIDs built into there...

    Many drives have PIDs built into there programming. A Static pressure sensor usually in the 0 to 5" range can be wired directly to the drive input and the drive programmed to control to the set point...
  44. Replies
    11
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    490

    I would consider having someone engineer a...

    I would consider having someone engineer a condensing unit and evap coil for this application. I am not familiar with the requirements but sounds like you need a high humidity along with...
  45. Replies
    4
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    361

    It looks as if the supply voltage is 575vac and...

    It looks as if the supply voltage is 575vac and the transformers change the voltage to 480 because all the motors in the unit are 480.
  46. Also, and this is just my understanding, the...

    Also, and this is just my understanding, the neutral should never be a voltage carrying wire. it carries current but no or very little voltage. again could be wrong about this.

    I don't believe...
  47. Replies
    14
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    885

    FA= Forced Air, probably

    FA= Forced Air, probably
  48. What's unusual about that is you have no zone...

    What's unusual about that is you have no zone dampers and one system with ducting to both floors but you system can select which floor to heat or cool. Your system is magical. Please tell us your...
  49. Good. He will get his 24 bucks worth from them...

    Good. He will get his 24 bucks worth from them I'm sure then replace the thermostat then wonder about O but hook it up anyway then tell his friends about how he fixed his own system but can't...
  50. Replies
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    3,050

    There is a limit t2 I think that is an input to...

    There is a limit t2 I think that is an input to the ucp. If you jumpered before the limit you can get heat contactor even with open limit. Also I thought you said heat did not work through test mode,...
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