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Type: Posts; User: HPQ

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  1. Replies
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    I agree 100% with your comment. I think my ducts...

    I agree 100% with your comment. I think my ducts and return are undersized for the 2.5 ton AHU causing higher static which means higher fan operating costs. Plus I have higher exit velocities at...
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    Ahhh, thank you now I understand what you were...

    Ahhh, thank you now I understand what you were getting at. I dont mind the noise at the intake - its out in the hall and not that bad.
    I think one of my problems is too high of an exit velocity at...
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    CORRECTION: ONLY OPTION IS TO SWAP COMPRESSOR OR...

    CORRECTION: ONLY OPTION IS TO SWAP COMPRESSOR OR SWAP BOTH COMPRESSOR AND AHU.
    I ORIGINALLY THOUGHT IT WAS POSSIBLE TO SWAP AHU ONLY BUT THERE IS NO AHRI REFERENCE NUMBER FOR THIS 2.5 TON COMPRESSOR...
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    I pulled filter and got a slight reduction in...

    I pulled filter and got a slight reduction in noise at the AHU intake but not much other noticeable effect. Still have strong "winds" - noise at registers.
    Cycle time unaffected. Im really starting...
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    I will try that but I assume I will get even more...

    I will try that but I assume I will get even more CFM when I think I need less.
    Will let you know.
    Thanks
  6. Replies
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    Right now its 94 RH43 - inside 75 RH50 (digital...

    Right now its 94 RH43 - inside 75 RH50 (digital hygro) roughly 10 minute cycles. I would not do anything by myself, the dealer would do any changes. I too am not a fan of jury rigging. I will keep a...
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    Thanks. I am using inexpensive digital hygrometer...

    Thanks. I am using inexpensive digital hygrometer to measure RH. Blower is set to Auto. Is there a way to increase static pressure to further lower CFM without creating noise/coil performance issue?...
  8. Replies
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    they created mini plenum under unit and installed...

    they created mini plenum under unit and installed the grill for return. Its in a closet.
  9. Replies
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    Also, the return intake was reduced to a grill...

    Also, the return intake was reduced to a grill with 15.5 x 15.5 insertable filter - AHU has 20 x20 intake /filter but couldnt be used access given the space limitations.
    Upflow unit with bottom...
  10. Replies
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    If at Tap 1 still too high, how can one increase...

    If at Tap 1 still too high, how can one increase static to get lower CFM?
  11. Replies
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    The AHU is set to the lowest electric tap - Tap 1...

    The AHU is set to the lowest electric tap - Tap 1 which gives CFM between 475 to 1145 depending on static - which has not been measured. See attached. The more I think about it, the less Im happy...
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    p.p.s. - turns out that cant match 2.5 ton XP17...

    p.p.s. - turns out that cant match 2.5 ton XP17 compressor to single speed 2 ton AHU so only single component swap option is to go down to 2 ton compressor. So I guess my comcern is will indoor coil...
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    p.s. I would still love to know what you think...

    p.s. I would still love to know what you think about which component to switch first if we are going to try. Thanks!!
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    2 Story townhouse - about 900 sq ft per floor...

    2 Story townhouse - about 900 sq ft per floor with about 300 sq ft of that being cathedral ceiling.
    Runtimes on the 87F Sunny days is roughly 10-15 minutes on and 5-8 minutes off.
    Cooler days or...
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    Humidity is not currently a problem - although on...

    Humidity is not currently a problem - although on cloudy days with high outdoor RH, indoor is higher than old system by about 4-6% I am basically concerned that by cycling more often I will pay more...
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    Location: NYC suburb

    Location: NYC suburb
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    Outside XP17-030 Inside CBX27UH-030 Thermostat...

    Outside XP17-030
    Inside CBX27UH-030
    Thermostat ComfortSense 7000
    I do not think dehumidify on demand was set up.
    Thanks!!
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    REPLACE OVERSIZED COMPRESSOR OR AIR HANDLER?

    Greetings:
    I recently had a new heat pump system installed to replace an old 2 ton system which on the hottest days of the year could hold indoor 77 deg F with low humidity.
    By accident the...
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