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  1. Replies
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    White rodgers zone valve

    Does anyone have any good wiring diagrams for white rodgers zone valves?
  2. Replies
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    Thank you. Thats exactly what i was looking for.

    Thank you. Thats exactly what i was looking for.
  3. Replies
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    white rodgers zone valve

    Can anyone explain to me the wiring on these zone valves. I see it has numbers 1-6 and would like to know
    how to trouleshoot them for the future calls that i might have. Thank you.
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    Expansion tanks

    I was on a call where the relief valve had popped recently. The customer had the old style expansion tank. I drained the tank and fired up the unit. It ran for 5 minutes and the pressure only...
  5. Thread: water feeder

    by hvac2379
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    364

    water feeder

    Is there any way to tell if a water feeder is stuck open allowing water to fill the boiler? I had a call today where the boiler relief valve had blown. When i fired up boiler burners ignited, extrol...
  6. Thread: chimney liner

    by hvac2379
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    1,842

    Chimney liner

    I install furnaces and sometimes a chimney liner is part of it. Not all 80% furnaces will get a chimney liner. I dont know is it just for outside walls? What about if you take out a 80 and put in a...
  7. Thread: chimney liner

    by hvac2379
    Replies
    23
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    1,842

    chimney liner

    what is the general rule with when to install a chimney liner
  8. Replies
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    1,138

    I sent in the criteria to join the pro forum...

    I sent in the criteria to join the pro forum tech. How long does it take to get a response? Also what is the 15 questions thing all about? Thank You
  9. Replies
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    sorry new to site didnt realize, i do what you...

    sorry new to site didnt realize, i do what you said
  10. Replies
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    1,138

    what does that mean

    what does that mean
  11. Replies
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    1,138

    metering device

    I should just put my temp probe on before and after the metering device?
    If there is a 3 degree difference, does that mean i have to replace it and can i just go with a txv after as along as i stay...
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    1,138

    Icing up lines

    I'm working on a bryant air conditioner. I went on a call and the compressor was shutting off on low pressure. I put the guages on it was 20psi on the low side. I went inside to check air flow and...
  13. Thread: economizers

    by hvac2379
    Replies
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    651

    I am new in the field and wanted to know how to...

    I am new in the field and wanted to know how to troubleshoot, test and verify operation of trane, carrier and york rooftop units? Also is there a support number for these units? Thank you for any...
  14. Replies
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    I want to purchase a 80% upflow furnace with a...

    I want to purchase a 80% upflow furnace with a coil already in there that which will need 125,000 btu's. Also a condensing unit that can handle the load. Can anyone steer me in the right direction?
  15. Thread: T-stats

    by hvac2379
    Replies
    2
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    600

    Has anyone ever come across a digital t-stat that...

    Has anyone ever come across a digital t-stat that said on it check filter? Also when in the field are there numbers for troubleshooting for all kinds of different situations?
  16. Thread: Fuses

    by hvac2379
    Replies
    14
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    1,193

    Can anyone tell me when checking a fuse on a...

    Can anyone tell me when checking a fuse on a trane rooftop 460V, do you have to take them out to check or can you just shut off the break and check? Also when checking these fuses, i know i will be...
  17. Thread: Ducts

    by hvac2379
    Replies
    1
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    520

    Can anyone tell me where i can get some solid...

    Can anyone tell me where i can get some solid spiral duct about 2 feet in dia. and and reducer to 1 ft.? Also 2 vents but the duct wont receive warm or cool air. It wont be part of the system.
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    I was wondering if anyone can tell me where i can...

    I was wondering if anyone can tell me where i can get some knowledge on these units. I have to check the econonmizers and dont know how. Any information on the units would be greatly appreciated.
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    Can anyone tell me the basic operation of chilled...

    Can anyone tell me the basic operation of chilled water systems, including the pump and how it cools and heats the space?
  20. Thread: Bearings

    by hvac2379
    Replies
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    How can you tell if your bearings are bad on roof...

    How can you tell if your bearings are bad on roof top units?
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    I was wondering what would cause the evaporator...

    I was wondering what would cause the evaporator coil to ice up. Is there some tests that would help me determine what the problem might be?
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    How do you check for static pressure in vents?

    How do you check for static pressure in vents?
  23. Thread: Supply vents

    by hvac2379
    Replies
    0
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    538

    I was wondering why the supply vents weren't...

    I was wondering why the supply vents weren't blowing enough air up? The air was cool but the t-stat was not being satisfied. There was only on return upstairs that had 3 bedrooms, a dining...
  24. Thread: Return vents

    by hvac2379
    Replies
    1
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    646

    I was in a house with 3 bedrooms, a dining room...

    I was in a house with 3 bedrooms, a dining room and a kitchen. There was only was return in the dining room. On the first floor was one big return, but thats it for the house. Shouldn't there be...
  25. Thread: Charging

    by hvac2379
    Replies
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    1,212

    I'm new in the field and i was wondering if...

    I'm new in the field and i was wondering if anyone can tell me the proper method for charging r-22? I was showed a couple different ways and was wanting to know the proper way.
  26. Thread: Refrigeration

    by hvac2379
    Replies
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    756

    Why does self contained and non self contained...

    Why does self contained and non self contained refrigeration systems defrost for 30 or 40 minutes?
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    Our compressor was running but the condensor fan...

    Our compressor was running but the condensor fan motor wouldn't, so i put in a new condensor fan motor. It would run for about 5 minutes and then shut off with the compressor still running. The amp...
  28. Thread: Schematic

    by hvac2379
    Replies
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    900

    Can anyone tell me where i could get more...

    Can anyone tell me where i could get more knowledge on understanding ladder and schematic diagrams?
  29. Thread: Sight glass

    by hvac2379
    Replies
    7
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    1,059

    What is the purpose of a sight glass on the...

    What is the purpose of a sight glass on the liquid line?
  30. Thread: T.D.

    by hvac2379
    Replies
    2
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    587

    What if the temperature difference is higher than...

    What if the temperature difference is higher than 20 degrees?
  31. Replies
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    Why does the condensor fan run continuously on...

    Why does the condensor fan run continuously on some units, while other units it cycle, keeping in mind both units have a fan cycle control?
  32. Thread: A/C units

    by hvac2379
    Replies
    3
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    599

    Can some1 give me a general idea of what the...

    Can some1 give me a general idea of what the condensor and evaporator do when using in summer?
  33. Thread: condensor fan

    by hvac2379
    Replies
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    715

    Why does some fan cycle controls cause the fan to...

    Why does some fan cycle controls cause the fan to run constantly?
  34. Thread: Ductilator

    by hvac2379
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    2,534

    Does any1 know where i could purchase a...

    Does any1 know where i could purchase a ductilator.
  35. Replies
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    I have to mount a condensor fan motor(3 ton)and a...

    I have to mount a condensor fan motor(3 ton)and a fan blade with the hub. It is on a marvair wall mount, is this hard to do?
  36. Thread: Relays

    by hvac2379
    Replies
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    621

    When checking a relay how do you know if the no...

    When checking a relay how do you know if the no or nc is working? Also, on a relay how many wires would be going to it? or does it matter on the application?
  37. Thread: New furnace

    by hvac2379
    Replies
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    2,388

    I have a 70%. I will installing a 80%+ most...

    I have a 70%. I will installing a 80%+ most likely trane(unless some1 recommends some other kind) and would like to know how do i know if my present ductwork is the proper size to deliver the right...
  38. Thread: Relays

    by hvac2379
    Replies
    2
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    601

    How are relays tested to see if that is the...

    How are relays tested to see if that is the problem or if there is some other part that is not functioning?
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    Besides a very dirty filter, what are some other...

    Besides a very dirty filter, what are some other reasons for iced up evaporators and compressors?
  40. Thread: Compacitor

    by hvac2379
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    16
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    1,798

    How do you know if you have and bad compacitor?

    How do you know if you have and bad compacitor?
  41. Replies
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    I was wondering if anyone can go a little in...

    I was wondering if anyone can go a little in detail about what a fan cycle control is and what does the the surrounding temperature has to do with it. Also, if it is set at 250psi and reaches 250...
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