Search Results - HVAC-Talk: Heating, Air & Refrigeration Discussion

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  1. Most definitely the plan. Hopefully, the HVAC...

    Most definitely the plan. Hopefully, the HVAC company I bought it from and who has done maintenance and previous service calls will fall into that category. This thread should help me to determine...
  2. What I've gathered is that my heat rise doesn't...

    What I've gathered is that my heat rise doesn't seem to be within the range specified on the furnace rating plate for Low and High. It sounds like there is at least one factor involved and that is...
  3. The last gentleman that came out acquired static...

    The last gentleman that came out acquired static pressure numbers (from manual measurement or control, I don't know) and took those and other ones home to run past someone. I could make high heat...
  4. Ugh. Are there options for further bringing down...

    Ugh. Are there options for further bringing down heat rise and supply temps that don't involve ductwork changes? Note: I ask for informational purposes only. I would of course discuss such changes...
  5. Thank you for that explanation beenthere. I have...

    Thank you for that explanation beenthere. I have some additional questions if someone has the time to reply...

    If I assume these don't apply:

    1) Ductwork or filter changes caused reduced...
  6. Manufactured: Sep 2011, Installed: Nov 2011.

    Manufactured: Sep 2011, Installed: Nov 2011.
  7. The HVAC company provided filter (fits into my...

    The HVAC company provided filter (fits into my 20x20 filter grille, a step up from the cheap fiberglass kind but not nearly as restrictive as the pleated ones) was checked and is fine. Note: I've...
  8. Thanks for the reply. Based on that math the...

    Thanks for the reply. Based on that math the maximum supply temp would be 152F for a 72F return (estimate for mine, forget what tech said he measured) and 160F for a 80F return (maximum per spec,...
  9. Appropriate output temps for 355CAV on heat

    My furnace has recently developed never before seen problems, consistent with overly high output temperatures. I'm not yet sure whether my HVAC company considers them resolved. After I last spoke...
  10. FWIW, by early morning I ended up with: FN...

    FWIW, by early morning I ended up with:

    FN 12/21/2012 5:52A
    32-low pressure
    switch open
    11 events

    FN 12/21/2012 5:36A
    12 blower on after
    after power up
  11. Well, the same exact thing just happened again. ...

    Well, the same exact thing just happened again. It seems something is causing the system to start running on High and high airflow (confirmed via control, despite staging be set to Low+Medium), it...
  12. Evolution 32-Low Pressure Switch Open events

    I have an Evolution system (355CAV042060, 186BNA018000, CNPVP2417ATA, and SYSTXBBUID01-C). While I've owned this system I've seen a small number of 32-Low Pressure Switch Open events. IIRC, they've...
  13. Thank you for the feedback. I searched for and...

    Thank you for the feedback. I searched for and found pictures of turning vanes. What is a scoop in dead-head 90 degree duct turn? Would that be like what I did but with a curved 90 degree piece of...
  14. Smoothing return airflow to make fan RPM lower *and* more consistent?

    Hi again. I'm still working through the "355CAV fan produces variable whining noises that are annoying" problem I previously mentioned but I have a standalone question.

    Attached is a drawing of...
  15. Southeast Pennsylvania

    Southeast Pennsylvania
  16. I received Manual Js and discussed the subject...

    I received Manual Js and discussed the subject with multiple companies. My home is very small and based on the heat load numbers (low to mid 20000s IIRC) the expectation was that this type of...
  17. 355CAV fan making a whine and warbling sound

    Hello. Last fall a reputable outfit replaced my old system with a: 355CAV042060, 186BNA018000, CNPVP2417ATA, and SYSTXBBUID01-C. The unit is in a room adjacent to the living room with a return...
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