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  1. Replies
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    My theoretical answer is a 410A valve wouldn't...

    My theoretical answer is a 410A valve wouldn't give you the numbers you're reading...which aren't bad. I would think the valve would "see" the higher bulb pressure as a warm suction line/high...
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    242

    You're confusing TXV "equalization" with...

    You're confusing TXV "equalization" with bleed/non-bleed TXV design/function, which aren't related. See page 8 in the link.

    TXV Principles
  3. Replies
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    What's the point/logic of going on service calls...

    What's the point/logic of going on service calls and not doing the repair? You need a new/different employer. :confused:
  4. Replies
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    Yeah, but what does it show as the cause for low...

    Yeah, but what does it show as the cause for low suction and low to normal superheat?



    And I've seen "charts" that gave 13 (count 'em, 13) causes for high head pressure...one being "prevailing...
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    You can't use "mobile home" and "great airflow"...

    You can't use "mobile home" and "great airflow" in the same sentence...:grin2:



    The 85 psi SST is around 24˚F...there's going to be some frosting, somewhere. Low suction and low to normal...
  6. Yes. :)

    Yes. :)
  7. If the stat's energizing "G" in both HEAT and...

    If the stat's energizing "G" in both HEAT and COOL (which is usually an "option"), the sequencer circuit will always be "open" during a HEAT or COOL cycle (unless the NC's or NO's, "stick"...
  8. You need one of these: Enclosed Fan Relay,...

    You need one of these:

    Enclosed Fan Relay, SPNO/SPNC, 24V

    COOL through the NO circuit, HEAT through the NC circuit
  9. Suction pressure (SST) is driven more by indoor...

    Suction pressure (SST) is driven more by indoor conditions than ambient, particularly if the evaporator is TXV fed. With a reasonable load and design airflow, SST's run in the 40˚ range. Some...
  10. With the given info, the "OD + 20" estimating...

    With the given info, the "OD + 20" estimating rule for SCT says it's just undercharged. The SST and superheat are good, DT not bad...if there was a "pumping" problem, the suction pressure would be...
  11. Replies
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    471

    Rheem's are/were close to 40, with the "N" coil...

    Rheem's are/were close to 40, with the "N" coil design.

    Rheem A/H
  12. Replies
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    Well, I decided a few (maybe several) years back,...

    Well, I decided a few (maybe several) years back, the "quality" of TXV's has diminished, like most of the other stuff we buy...so, a little hunting may be the best you're gonna' get.
  13. Replies
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    ..and sometimes, they just "hunt"...

    I replaced a Trane unit TXV, after which time I noticed the valve mildly "hunting", and mentioned it to the distributor's tech rep. He replied, some hunting was "normal".
  14. Replies
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    You seen the Mitsubishi "high heat" models? Not...

    You seen the Mitsubishi "high heat" models? Not sure how they do it, but...

    Mitsubishi Brochure
  15. True to my typical behavior, I didn't read the...

    True to my typical behavior, I didn't read the "notes"...:oops:

    Let me ask a non-related question...

    Do you have a "scientific" explanation for bubbles in the sight glass, resulting from...
  16. Plug in "shellkamp's" numbers from the...

    Plug in "shellkamp's" numbers from the Non-Condensables or Overcharge thread and see what you get...or have you already done so? I used 75/65 for ID WB/DB values, and an average of the pressures.
  17. Replies
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    I'm not surprised...kinda' like requiring a...

    I'm not surprised...kinda' like requiring a record of PM's for a leaking "A" coil warranty replacement. Like PM's are going to prevent them from failing? :Faint:
  18. Replies
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    Some details on trap specifics: Condensate...

    Some details on trap specifics:

    Condensate Traps
  19. Thread: coleman

    by Saturatedpsi
    Replies
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    1,165

    Where exactly, are the leaks occurring?

    Where exactly, are the leaks occurring?
  20. Replies
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    577371 :gah:

    577371
    :gah:
  21. Replies
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    I'm glad you posted that comment. :) I could...

    I'm glad you posted that comment. :) I could never quite understand how "return air" can have a big effect on "conditioning" the space, nor completely follow some of the arguments for a "high" or...
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    If the superheat is "normal", and probably is,...

    If the superheat is "normal", and probably is, the lowish suction would be due to lowish airflow; and the 70˚ ID would drive it down a little.

    No clue as to yesterday...:confused:
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    Well, did you decide there was a misprint or...

    Well, did you decide there was a misprint or misunderstanding?
  24. Replies
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    Which is not to necessarily say there couldn't be...

    Which is not to necessarily say there couldn't be a misprint...most anything is possible these days. :grin2:
  25. Replies
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    2,460

    The air handlers ship without aux heat, so the...

    The air handlers ship without aux heat, so the air handler data plate applies only to the blower motor and controls. The heat kit has a data plate showing it's electrical requirements.
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    Never mind... :o

    Never mind... :o
  27. Replies
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    It happens, depending on the wiring logic, and...

    It happens, depending on the wiring logic, and the explanation is something like what you concluded. Only, the power (one leg) is going to the motor first, then through some part of the grounded...
  28. I found some language: Effective Ground-Fault...

    I found some language:

    Effective Ground-Fault Circuit Path

    "A low impedance circuit facilitating the operation of the overcurrent device...The earth shall not be considered as an effective...
  29. All I know for sure is, if I got one hand on the...

    All I know for sure is, if I got one hand on the wet grass and the other on the unit, I ain't supposed to receive a shock. Said another way, if one probe of the meter is stuck in the wet grass and...
  30. I'm not "electrically fluent" but pretty sure the...

    I'm not "electrically fluent" but pretty sure the sub panel is supposed to have a "ground" conductor going back to the main panel ground bar, which will eventually connect to the utility service...
  31. I'm not sure what you mean there, but something...

    I'm not sure what you mean there, but something is amiss with the "shock".

    The couple of times I've received shocks from cabinets, there was a missing ground connection somewhere. And soon as I...
  32. Replies
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    I'm just guessing at remote scenarios...and not...

    I'm just guessing at remote scenarios...and not familiar with York single stage, let alone, 2 stage systems.

    Are you leaning towards a heat cycle specific / contactor chatter issue?

    Do W1 and...
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    Scratch that...finally saw a post where it was...

    Scratch that...finally saw a post where it was checked/eliminated. What about system pressures in heat mode? Low's or high's possibly approaching the limit switch values?
  34. Replies
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    I don't see a connection either, and agree with...

    I don't see a connection either, and agree with the already mentioned "chattering" theory.

    Since it's only happening during heating season, one would think it's defrost cycle related. You've...
  35. Replies
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    OEM contactors for replacement, or wholesale...

    OEM contactors for replacement, or wholesale house specials? What's the inductive amperage rating of the contactors?
  36. Replied too soon...HvacrMedic came up with the...

    Replied too soon...HvacrMedic came up with the superheat formula. The slide rules, charts, etc have been around longer than I've been in the business, but had to have been "created" by the...
  37. I'm still not sure what the question is, but...

    I'm still not sure what the question is, but here's an opinion:

    Subcooling targets, to the best of my knowledge, apply only to TXV fed evaporator coils. Most all the 10 SEER equipment I've seen,...
  38. Where did you get the so called 10˚ and 15˚...

    Where did you get the so called 10˚ and 15˚ "target" values in the first place? Or, is that even what you're asking?
  39. Replies
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    Sounds like a fix to me...:grin2: I'm not...

    Sounds like a fix to me...:grin2:

    I'm not really understanding how Rheem determined hi/lo heat blower CFM's, or why you were told "it's normal on the 04 furnace".:confused: Whatever procedure...
  40. Replies
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    Per Fluke: 562821 It's easy to get wide...

    Per Fluke:

    562821

    It's easy to get wide variations in readings due to "positioning". One isolated wire is easy to negotiate, while another in the back of a conductor congested panel is...
  41. Replies
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    I have no experience with the furnace, but found...

    I have no experience with the furnace, but found your post interesting and Googled up an install manual. It shows low and high fire blower adjustments for temp rise, which is a design approach I...
  42. Replies
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    If you don't have literature on the defrost board...

    If you don't have literature on the defrost board operation, this link will get you to a PDF that covers the control, page 16. Defrost Operation

    Baldloonie's thoughts about the 5˚ OD thing might...
  43. Thread: TXV

    by Saturatedpsi
    Replies
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    2,544

    I don't know any more about TXV design and...

    I don't know any more about TXV design and construction than the next guy, but would think a bypass circuit, operating as designed, would allow normal heat cycle operation. But over the years, I've...
  44. Thread: TXV

    by Saturatedpsi
    Replies
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    2,544

    What were the pressures and OD/ID temps, and how...

    What were the pressures and OD/ID temps, and how did you decide they were low?



    That's pretty much what you could expect to happen if the heat cycle was operating anywhere near normal. With no...
  45. Plugged TXV's don't generate 10˚ superheat...plus...

    Plugged TXV's don't generate 10˚ superheat...plus you're talking about an issue that has only recently surfaced . He's working with a system that's been in place for a number of years.
  46. ..maybe since Day 1? :grin2: The numbers you...

    ..maybe since Day 1? :grin2:

    The numbers you posted are textbook, low evaporator load symptoms, as previously suggested. Instead of looking for a "failure", investigate the possibilities of...
  47. Replies
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    1,805

    With only 4 wires, I'd think it was the constant...

    With only 4 wires, I'd think it was the constant torque variety. 2 wires carry 240V, 2 carry 24V. Google "X-13 motor operation". It will yield some links that'll tell you what you want to know.
  48. Replies
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    "Constant torque" (X-13) type motor? "Broad...

    "Constant torque" (X-13) type motor? "Broad Ocean" brand, by chance?
  49. One of the nice things about Goodman is...

    One of the nice things about Goodman is out-of-warranty OEM parts prices. I recently bought a Trane 4 ton indoor "A" coil...could have bought at least three Goodman coils for the same price. :gah:
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    I would think 'chylton' is referring to time-temp...

    I would think 'chylton' is referring to time-temp defrost controls and the DFT "sensor", which is simply an on-off switch. I've never seen any troubleshooting literature suggesting shunting...
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