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  1. Replies
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    841

    yes 90% furnaces

    yes 90% furnaces
  2. Replies
    5
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    841

    checking heat exchangers

    can a exchanger be check by blocking off intake pipe turning on fan only using a manometer hook up intake box?
  3. Thread: rev valve

    by iowa tech
    Replies
    7
    Views
    655

    rev valve

    what is the best way of replacing one?
    unsolder or cutting it out with saw
  4. Replies
    30
    Views
    4,469

    Orfice was missing

    Orfice was missing
  5. Replies
    30
    Views
    4,469

    so is Inducer Orifice in blower or Header Box?

    so is Inducer Orifice in blower or Header Box?
  6. Replies
    30
    Views
    4,469

    Temp is about 135 in flue New c blower install...

    Temp is about 135 in flue
    New c blower install by first tech
    Yes 90%
  7. Replies
    30
    Views
    4,469

    nordyne tripping limit

    model m3rl080a
    ser m3a050301139

    keeps tripping limit on combustion blower
    work alright while i there
    something over heating but what
    any help?
  8. Replies
    23
    Views
    1,482

    so if furnace kicks in at 35* how do you save...

    so if furnace kicks in at 35*

    how do you save money?

    when it cold and furnace runs anyway
  9. Replies
    23
    Views
    1,482

    where in iowa are you?

    where in iowa are you?
  10. Replies
    17
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    1,307

    so have you called them back out?

    so have you called them back out?
  11. at the valve and t-stat

    at the valve and t-stat
  12. new valve out of box old valve was doing same...

    new valve out of box
    old valve was doing same thing that why i replaced it
  13. ok thanks

    ok thanks
  14. 10psi at valve

    10psi at valve
  15. system has 10psi steam pressure

    system has 10psi steam pressure
  16. Replies
    1
    Views
    428

    VP525C Series Pneumatic Radiator Valve

    installed new VP525C1024 VP525C Series Pneumatic Radiator Valve will not close off steam. i have 10psi at control and at valve actuator. valve had 3-10 psi spring also tryed the 2-5 spring still not...
  17. Replies
    4
    Views
    2,124

    Contact Information AIRE-FLO 2100 Lake Park...

    Contact Information

    AIRE-FLO
    2100 Lake Park Blvd.
    Richardson, TX 75080
    1-800-982-2333
  18. VP525C1024 VP525C Series Pneumatic Radiator Valves

    installed new VP525C1024 VP525C Series Pneumatic Radiator Valve will not close off steam. i have 10psi at control and at valve actuator. valve had 3-10 psi spring also tryed the 2-5 spring still not...
  19. Replies
    20
    Views
    8,287

    model asp3125-347 also check plug with no...

    model asp3125-347

    also check plug with no motor had 120 to net on one leg

    check other leg high speed 65v low 75v does that help

    i think i have a bad motor right
  20. Replies
    9
    Views
    1,413

    ok i know i need help on pneumatics do you...

    ok i know i need help on pneumatics

    do you know any thing about how the switch controls the motor?
  21. Replies
    9
    Views
    1,413

    so do they power both windings thru the trans at...

    so do they power both windings thru the trans at same time?
  22. Replies
    20
    Views
    8,287

    do you know how the switch is wired?

    do you know how the switch is wired?
  23. Replies
    9
    Views
    1,413

    still need to know how the switch should be wired...

    still need to know how the switch should be wired in case someone has been playing
  24. Replies
    9
    Views
    1,413

    not sure what pe switch is i have three button...

    not sure what pe switch is

    i have three button switch off hi low
    high speed runs all the time switch can only turn fan off

    just start new job that works on them,so real new to them
  25. Replies
    20
    Views
    8,287

    i can do that would like to have wiring...

    i can do that

    would like to have wiring diagram to work from to make it easyer
  26. Replies
    20
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    8,287

    so with no numbers how can i get wiring diagram ...

    so with no numbers how can i get wiring diagram

    do all units have relays ?

    back of switch has 7 spots for wires don't know what is what
  27. Replies
    20
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    8,287

    yes hi low off

    yes
    hi
    low
    off
  28. Replies
    20
    Views
    8,287

    herman nelson unit ventilator

    I have a school with old Herman Nelson Unit ventilators. This stuff is from 1967 and is all pnuematics. Does anyone have any literature on this stuff? i'm new to pnuematics.motor low speed not...
  29. Replies
    9
    Views
    1,413

    unit ventilator

    I have a school with old Herman Nelson Unit ventilators. This stuff is from 1967 and is all pnuematics. Does anyone have any literature on this stuff? i'm new to pnuematics.motor low speed not...
  30. Replies
    15
    Views
    6,111

    its on the unit find it

    its on the unit find it
  31. Replies
    9
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    823

    42 years old

    42 years old
  32. Replies
    10
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    731

    need more air flow upstairs (spit level ) for...

    need more air flow upstairs (spit level ) for comfort and filtering
  33. Replies
    10
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    731

    i have g32v fan on runs at 70% can this be...

    i have g32v fan on runs at 70% can this be changed also if so can it be found at davenet or could you post in pro area how ?
  34. Replies
    14
    Views
    1,220

    sp 0.0 wc thur 0.8 wc will give 1060 cfm low sp...

    sp 0.0 wc thur 0.8 wc will give 1060 cfm low
    sp 0.0 wc thur 0.8 wc will give 1105 cfm medium low
    sp 0.0 wc thur 0.8 wc will give 1260 cfm medium high
    sp 0.0 wc thur 0.8 wc will give 1330 cfm ...
  35. Replies
    14
    Views
    1,220

    my furnace has vs motor, chart say sp 0-.8 will...

    my furnace has vs motor, chart say sp 0-.8 will give me 1330 cfm max so what sp should i use to set up duct work
  36. Replies
    34
    Views
    3,253

    low lost fittings

    what ones do you use? what the best?

    thanks
  37. Replies
    18
    Views
    1,601

    does the furnace come on or just hot air out of...

    does the furnace come on or just hot air out of vents?
    a/c still running?
  38. Thread: no flow

    by iowa tech
    Replies
    30
    Views
    1,850

    why no2 in lines?

    why no2 in lines?
  39. Thread: no flow

    by iowa tech
    Replies
    30
    Views
    1,850

    you would know if compressor is pumping at all....

    you would know if compressor is pumping at all. if it can't pump back then you have bad compressor (valves).or maybe a bad start cap.
  40. Thread: no flow

    by iowa tech
    Replies
    30
    Views
    1,850

    can you pump freon back into condenser by closing...

    can you pump freon back into condenser by closing service valves?
  41. Thread: no flow

    by iowa tech
    Replies
    30
    Views
    1,850

    does it pump back?

    does it pump back?
  42. Thread: no flow

    by iowa tech
    Replies
    30
    Views
    1,850

    did the compressor pump back? is the compressor...

    did the compressor pump back?
    is the compressor running, same pressure both sides not running or bad

    what do you mean amps 7., 6., 5.?
  43. Replies
    5
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    651

    could have to much pressure with good valve. had...

    could have to much pressure with good valve. had one make noise when turning on and off.
  44. Replies
    17
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    5,373

    could you show how to do it please

    could you show how to do it please
  45. Replies
    52
    Views
    3,557

    so why does lennox say 16"x25" filter is what you...

    so why does lennox say 16"x25" filter is what you need for 3 ton furnace?
  46. Replies
    12
    Views
    2,416

    variable speed

    so what happens with variable speed?
  47. Replies
    13
    Views
    2,094

    tring to find btu output of system

    tring to find btu output of system
  48. Replies
    13
    Views
    2,094

    can you tell how this would be done? no manual...

    can you tell how this would be done? no manual ifo
    thanks
  49. Replies
    13
    Views
    2,094

    condenser airflow

    how do you find condenser cfm?
  50. Thread: filter size

    by iowa tech
    Replies
    12
    Views
    995

    should you use same asp for supply and return

    should you use same asp for supply and return
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