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  1. check water flow rate, apartment maint or service...

    check water flow rate, apartment maint or service contractor would need to do that
  2. Replies
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    3,059

    Is the evap iced up? Does this have off cycle...

    Is the evap iced up? Does this have off cycle defrost? Fan(s) running ok. What type refrigerant?
  3. it could be the riser to all floors going up...

    it could be the riser to all floors going up through your apartment wall to feed other floors. Would not make any difference if you zone valve is open or closed. Water flow may be to high.
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    158,094

    Just yesterday a call from a food processing...

    Just yesterday a call from a food processing plant. "The dock is hot" we need emergency service. Drive over an hour, they take me to the equipment, it's heat and vent only.
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    851

    www.tranehk.com/eng_news/vol42_2.pdf[URL="www.tran...

    www.tranehk.com/eng_news/vol42_2.pdf[URL="www.tranehk.com/eng_news/vol42_2.pdf"]
    here is a link to single zone vav. This is probably why they want to add supply fan drives. Duct static sensing is...
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    851

    Single zone vav has become common practice in my...

    Single zone vav has become common practice in my neck of the woods. Similar to Chuz's suggestion but a few modifications. Only works properly with modulating cooling (digital scroll or chilled...
  7. Thread: King valve

    by ckartson
    Replies
    55
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    2,125

    There is no hating here. I like this site also. I...

    There is no hating here. I like this site also. I do vent sometimes and it might come out wrong but it's all good.
  8. Thread: King valve

    by ckartson
    Replies
    55
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    2,125

    I don't freak when a customer calls their...

    I don't freak when a customer calls their equipment or components by the wrong names, I expect it. They don't know and are not professionals in our industry. But when we call refrigerant Freon and...
  9. Thread: AC question

    by ckartson
    Replies
    23
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    1,347

    Did this system work properly before the...

    Did this system work properly before the compressor change. Seems to me you inherited some one else's mis application or sizing issue. As was mentioned are exhaust fans and makeup air up to speed?
  10. Thread: King valve

    by ckartson
    Replies
    55
    Views
    2,125

    The term is used very loosely any more. King...

    The term is used very loosely any more. King valve was the valve that is mounted on the outlet of a receiver. Otherwise you had a liquid line shutoff valve or a suction line shutoff valve. Now it...
  11. Replies
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    3,374

    Thank you Jtrammel. Evacuation is not a form of...

    Thank you Jtrammel. Evacuation is not a form of leak checking. Pressure tests are. Evac leak checks are only good to 14.7 psi but pressure tests are good to whatever pressure is supplied. System is...
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    this is correct

    this is correct
  13. Replies
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    3,588

    Water Lines?

    Water Lines?
  14. Replies
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    4,730

    10 sh in cooling mode doesn't mean 10sh in heat...

    10 sh in cooling mode doesn't mean 10sh in heat mode. Heat mode uses a different expansion device. I'm not saying the comp couldn't have just failed due to nothing you did wrong.
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    1,333

    Three phase motors will not have caps.

    Three phase motors will not have caps.
  16. Replies
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    2,368

    You look very proud of your machine! Phones...

    You look very proud of your machine! Phones actually take colored pictures.:grin2:
  17. That style diffuser may have a set of adjustable...

    That style diffuser may have a set of adjustable blades behind the ones we see. Can't tell from photo. Good point. Otherwise duct traverse and set cfm. Does the AHU fan have a VFD?
  18. All branch ducts are to have manual volume...

    All branch ducts are to have manual volume dampers. It's code in my area anyway. That's how air balance is done.
  19. Air balancer should set fan speed. Did you have...

    Air balancer should set fan speed. Did you have an air balance done? You should get a copy of report .
  20. Landlord especially should have service...

    Landlord especially should have service contracts. Filters should never be left up to tenants.
  21. Prices are not allowed but I'm sure the mods will...

    Prices are not allowed but I'm sure the mods will catch it and delete pricing. As far as workmanship send photos. What repairs were performed. If a coil box HAS to be cut open sheet metal patch and...
  22. Thread: Stupid Forum

    by ckartson
    Replies
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    2,533

    I don't get why you are so angry. All your...

    I don't get why you are so angry. All your questions were answered.
  23. Replies
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    1,222

    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...
  24. 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.
  25. Replies
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    513

    Roof Top Unit, heat and air

    Roof Top Unit, heat and air
  26. Replies
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    1,341

    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.
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    1,527

    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....
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    1,347

    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...
  29. Replies
    9
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    1,553

    Bypass open.

    Bypass open.
  30. Replies
    754
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    158,094

    What was wrong?

    What was wrong?
  31. Replies
    10
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    1,123

    Ammoniadog, curious about what is detrimental...

    Ammoniadog, curious about what is detrimental about low amp draw? Also how low are you talking?
  32. Replies
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    3,821

    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,...
  33. Replies
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    2,609

    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...
  34. 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
  35. 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.
  36. Replies
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    1,995

    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.
  37. Replies
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    3,177

    I think you mean co sensors correct?

    I think you mean co sensors correct?
  38. Replies
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    1,515

    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...
  39. 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...
  40. Replies
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    Please put hans back in pockets it's -7F...

    Please put hans back in pockets it's -7F here.:grin2:
  41. Replies
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    914

    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
  42. Replies
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    594

    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.
  43. Replies
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    824

    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?
  44. Replies
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    1,587

    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...
  45. 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...
  46. Replies
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    695

    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...
  47. Replies
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    3,943

    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.
  48. Replies
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    2,181

    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.
  49. Replies
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    1,567

    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...
  50. Replies
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    985

    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?
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