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Type: Posts; User: Jeff P

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  1. Replies
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    I take it this is a bad design.Adding baffles to...

    I take it this is a bad design.Adding baffles to reduce airflow to save manufacturing costs.I am looking into natural gas.(line is appx.350' away) and hopefully get rid this fuel hog furnace.
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    Thanks beenthere.I have seen low firing rate...

    Thanks beenthere.I have seen low firing rate baffles mentioned after searching it.This is the only PDF I have...
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    Here is wiring diagram:

    Here is wiring diagram:
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    691

    No,All unit dimensions,filter & duct openings are...

    No,All unit dimensions,filter & duct openings are identical.It almost has to be electrical.
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    What Am I Missing?

    Two Luxaire Furnaces- Model #PBFMD12F08501A and Model#PBFMD12F05501A.Both Furnaces Use The Same Blower Motor And Wheel With Different Airflow Ratings.Something Has To Regulating Flow On The Smaller...
  6. Thats a little better.Thank you.

    Thats a little better.Thank you.
  7. Supply (sorry).

    Supply (sorry).
  8. Is the EL of this box on box equal to 200 feet?

    It seems a little much?
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    Thanks for the link hvacrmedic.I dont intend to...

    Thanks for the link hvacrmedic.I dont intend to do modifications required as I dont have tools or knowledge of setting up.I am trying to determine (using manual J&D and the great knowlede of the guys...
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    Need eqiv. lengths for: 3924 supply trunk...

    Need eqiv. lengths for: 3924 supply trunk tee/3892 plenum/3925 trunk/3920 pan to trunk/3893 trunk to plenum.Also for 8"x8"x8" tee.Pictures in my album.Thanks for any help.
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    Yes it has me very confused reading it.Differrent...

    Yes it has me very confused reading it.Differrent wheels makes sense.I will post some pictures of data in my album.Thanks for all your help.
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    Blower is 1/3 H.P. 10x9 wheel.Would rpm numbers...

    Blower is 1/3 H.P. 10x9 wheel.Would rpm numbers help?If you are referring to an earlier post it is the 85,000 ( larger blower).
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    Cooling is 2-ton.Coil rating at 800 CFM is .16...

    Cooling is 2-ton.Coil rating at 800 CFM is .16 wet/.16 dry.Furnace BTU is correct.Return grilles are hart and cooley/661/14"x6".Supplies are h&c/406/18".Low speed @ .8 is 835 cfm. ...
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    O.K. If System design is .5 Static pressure and...

    O.K. If System design is .5 Static pressure and lets say total longest Return and Supply runs are approximately 500 feet that would give duct system a .1 value.Is this correct? Anyone have a link to...
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    So 1000 CFM would be a close duct design...

    So 1000 CFM would be a close duct design value?(Supply 8"x30" @ 700 FPM.)(Return 8"x36" @ 600 FPM.)Are these numbers close?
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    55-85 F

    55-85 F
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    Thanks gravity.I am need to establish CFM to...

    Thanks gravity.I am need to establish CFM to ensure my ducts are correctly sized before getting system fine tuned.I thought a lower BTU would require a little less air flow.Just need a number to...
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    The 72,000 is listed as an alternate output.The...

    The 72,000 is listed as an alternate output.The furnace manual only shows 55/85/100/&125 data.Beckett oil burner manual shows 55/85/100/125/170.Furnace manual factory set heating speeds are...
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    Airflow Required?

    What is the required airflow for 72,000 BTU oil furnace.
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    Furnace Return temp. 2' before filter is 65....

    Furnace Return temp. 2' before filter is 65. Supply Temp 1'after plenum is 140.
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    Posted some pictures in my album.Im sure you guys...

    Posted some pictures in my album.Im sure you guys have seen worse.
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    Any recommendations on Heat Pump lockout...

    Any recommendations on Heat Pump lockout temp?Equipment CPH settings?Is Furnace to Big?My contractor got lucky with sizing my A.C. It seems alot of contractors are leaving the V out of HVAC.
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    Did a heat load calc.Very easy program.Well worth...

    Did a heat load calc.Very easy program.Well worth every penny.Results are:Outside: Summer96/Winter11 Inside:Summer75/Winter72. Heat Gain 21,223 Heat Loss 38,939.
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    Motor is 1/3 H.P. (10x9 wheel).Heat Pump...

    Motor is 1/3 H.P. (10x9 wheel).Heat Pump installed 6 Months ago.I have considered lowering furnace BTU to alternate 72,000 BTU by changing nozzle as per rating. Furnace is 80% eff.Could I then reduce...
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    Thanks udarrel.I have read many of your articles...

    Thanks udarrel.I have read many of your articles outside of this site.You would think coil pans would have tapered bottoms to funnel air up into the A-coil.(This was my "ramp" theory).Blower speed ...
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