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  1. Replies
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    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.
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    1,123

    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.
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    632

    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...
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    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?
  5. 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...
  6. Thread: help?

    by ckartson
    Replies
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    679

    My point exactly, Thanks for saying it clearly.

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

    by ckartson
    Replies
    19
    Views
    679

    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.
  8. 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...
  9. 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...
  10. Thread: Cooling Off

    by ckartson
    Replies
    60
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    3,641

    Wha tev?

    Wha tev?
  11. Replies
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    1,236

    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...
  12. Thread: Torpedo level

    by ckartson
    Replies
    9
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    499

    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.
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    832

    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...
  14. Replies
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    Condensor is to clean.

    Condensor is to clean.
  15. Replies
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    2,173

    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...
  16. Replies
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    471

    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.
  17. Replies
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    4,956

    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.
  18. Replies
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    682

    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.
  19. Replies
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    455

    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...
  20. Replies
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    395

    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...
  21. Replies
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    294

    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.
  22. 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...
  23. Replies
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    775

    FA= Forced Air, probably

    FA= Forced Air, probably
  24. 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...
  25. 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...
  26. Replies
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    2,801

    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,...
  27. If it's an apartment why are you responsible for...

    If it's an apartment why are you responsible for repairing it. Isn't it landlords responsibility. Yes the cartridge can be replaced but the air you introduce may end up in someone else's fan coil....
  28. If it's an apartment why are you responsible for...

    If it's an apartment why are you responsible for repairing it. Isn't it landlords responsibility. Yes the cartridge can be replaced but the air you introduce may end up in someone else's fan coil....
  29. Zone dampers are motorized dampers not the volume...

    Zone dampers are motorized dampers not the volume dampers located at each branch duct. If the stats are paralleled not sure how you ever achieved any level of comfort. That's why I suggested a pro...
  30. Replies
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    2,801

    Have you checked limits? I am not 100% familiar...

    Have you checked limits? I am not 100% familiar with the model that you are referring to but I believe there is a limit input to the UCP. Jumpering the ucp heat output may be bypassing the limit. I...
  31. What does the upstairs t'stat control? Do you...

    What does the upstairs t'stat control? Do you have a second unit for the second floor? Do you have zone dampers that may not be working? Along with those questions the "O" terminal is usually used...
  32. Sorry about the problems you are having. There is...

    Sorry about the problems you are having. There is a contractor locator on this site. Circuit setters automatically adjust flow to the heatpump. This does not mean that a strainer is not plugged or...
  33. Several people have asked what is the water temp...

    Several people have asked what is the water temp but no answer. The reason they asked is because your problem relates directly to source water temperature and or flow. Simply stating flow and...
  34. what type refrigerant

    what type refrigerant
  35. Replies
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    You need some type of global controller to access...

    You need some type of global controller to access them. If you have the sevice tool you can connect through that or connect it to an existing system, 24 v and communication would all you need to hook...
  36. Replies
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    You sound motivated but working for free probably...

    You sound motivated but working for free probably won't happen due to liability. Here anyway if you are on a job you must be covered by wokmans comp and an employee. Doesn't mean you still can't...
  37. Replies
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    I had the same argument with someone I respected...

    I had the same argument with someone I respected and was quite knowledgeable. I didn't buy his argument but it was always in the back of my mind till I read this post. He claimed that vapor pressure...
  38. Replies
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    You are right about the old gravity systems and...

    You are right about the old gravity systems and one of the reasons the supplys were on interior walls was to keep the duct runs short. If the air cooled the less chimney effect and less heat into the...
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    Commercial installations the air distribution is...

    Commercial installations the air distribution is from the ceiling. Attention must be paid to the throw of the diffuser.
  40. You said filter drier was in the discharge line?...

    You said filter drier was in the discharge line? Maybe it broke up and is plugging things.
  41. Is the bed room over a garage or conditioned...

    Is the bed room over a garage or conditioned space? Increased velocity is increase in cfm. Velocity x Area = CFM. The question remains how much cfm is actually required.
  42. Ask him for the patent number on his unique stat....

    Ask him for the patent number on his unique stat. Or the model I would love to see it.
  43. Percent retrofitted?

    Percent retrofitted?
  44. Replies
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    What do your local codes require? Why do you say...

    What do your local codes require? Why do you say old people don't get cold, I service and start up many retirement homes and they are always running at about 78f. Older folks need it warmer. The...
  45. My heart goes out to you Kefah. We hear about...

    My heart goes out to you Kefah. We hear about these things on the news but you made it very real. Keep in touch and stay safe.
  46. Thread: HVAC apps

    by ckartson
    Replies
    4
    Views
    558

    Thanks, the narrative says good for ITunes and...

    Thanks, the narrative says good for ITunes and Iphone. I have a Samsung galaxyS4 do you think the refrigerant calculator will work with this phone? I am really really new to this or any smart one.
  47. Replies
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    1,748

    Accumulated doesn't compensate for charge

    Accumulated doesn't compensate for charge
  48. Replies
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    1,748

    Use a bidirectional receiver

    Use a bidirectional receiver
  49. Thread: HVAC apps

    by ckartson
    Replies
    4
    Views
    558

    HVAC apps

    I am now in the twenty first century with a smart phone provided by the company I work for. I have been learning daily just basic functions. I know many of you use them and refer to apps in your...
  50. Static pressure should be .5"wc range. If you...

    Static pressure should be .5"wc range. If you have no static pressure control as was suggested then you will have no set point adjustment. I am unfamiliar with resi zoning systems but work...
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