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Carrier Hvac airhandler

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mrwiz
mrwiz Member Posts: 6
edited June 5 in A-C, Heat Pumps & Refrigeration
1000015405.jpg

I was told that this was installed wrong and should have a metal enclosure under it to help with the return air for such a large blower. Static measurement after the filter and before the n coil reads 1.0. My question is can i add another vent and filter to the other side (left) of the blower cabinet to achieve the same result and reduce static pressure.

1000012692.jpg

Comments

  • neilc
    neilc Member Posts: 3,196
    edited June 5

    ty

    known to beat dead horses
  • mrwiz
    mrwiz Member Posts: 6
    edited June 5

    Text moved to original.....newbee errors

  • mrwiz
    mrwiz Member Posts: 6
    1000012692.jpg

    Cover removed

  • mrwiz
    mrwiz Member Posts: 6

    Pic removed

  • pecmsg
    pecmsg Member Posts: 7,236

    only the picture with the cover off shows

  • pecmsg
    pecmsg Member Posts: 7,236

    we need the carrier model #?

  • pecmsg
    pecmsg Member Posts: 7,236

    https://www.contractingbusiness.com/service/article/20868162/measure-static-pressure-in-six-simple-steps

    mrwiz
  • HVACNUT
    HVACNUT Member Posts: 7,517
    edited June 5

    You mean the furnace should be sitting on a return pedestal and draw from below?

    Is that a filter rack in the return? What type filter?

    The supply configuration is a little funky. It might be building up pressure where the plenum meets the main trunk duct. A radius 90° would let it flow nicely. Everything looks sealed well, so the correct size matters even more.

    mrwiz
  • mattmia2
    mattmia2 Member Posts: 17,306
    edited June 5

    you need to make sure the problem isn't in the ducting system itself too, especially the returns or grills that are covered with 50 years of dust and paint and painted over dust.

    or high efficiency filters that are too restrictive.

  • mattmia2
    mattmia2 Member Posts: 17,306

    why does the control board have 100 fairly high power resistors on it?

  • pecmsg
    pecmsg Member Posts: 7,236

    that looks like a variable speed system.
    again we need a model #

  • Kaos
    Kaos Member Posts: 913

    By the looks of it, your bigger restriction is the small filter. A large filter also means a bigger hole so air can more easily flow around the blower.

    If your gauge does differential pressure measurement, do the readings posted in the earlier link and post the readings. Also a lot of the cheap digital gauges are good for 3PSI or 83" water, so they are not accurate for measuring sub 1".

  • mrwiz
    mrwiz Member Posts: 6

    Thank you all

    Furnace carrier: 58ctw110—-11122

    N COIL: cnpvp482a

    compressor: 24abc648a

    No idea about resistor component size but circa install 2019. When i got the house it was wired as a single stage. Replaced tstat and wiring solved that issue. Low speed fan was helpful.But the system has always been loud. And inefficient. I have 3 returns down stairs and 3UP. Looking at changing them for a more open design. 4x10 registers that are low restriction. I have 181 nominal cfm down and 82cfm up. All dampers are wide open. Talking to local service folk, they suggested in circa 2019, contractors did not include a reservoir under the blower chassis that is common place now. My thought was i could add another filter frame on the left side equivalent to the reservoir or riser area suggested for the bottom. Would that have the same effect as a bottom riser. Filter rack is the same size as blower inlet. Thank you

  • mrwiz
    mrwiz Member Posts: 6

    Filter currently is a merv 8 but i have tested with a rock catcher and no filter.

  • HVACNUT
    HVACNUT Member Posts: 7,517
    Screenshot_20260606_062401_Samsung Browser.jpg

    You seem to have the tools and the knowledge. Read the book. Its possible a simple change of fan speed is all that's needed if sub cooling and heat rise stay in range.

  • pecmsg
    pecmsg Member Posts: 7,236

    1610 - Aprilaire 1610 - 16" x 25" Easy Install Media Air Cleaner

    Air doesn't like sharp 90° bends. This will lower that static a bit.

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