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  1. Replies
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    Will be great to know how it turns out. Projects...

    Will be great to know how it turns out. Projects like this good to learn from.
  2. The nicest thing about those driers is that you...

    The nicest thing about those driers is that you have room to "cut" them out without needing more line length to attach the new drier.

    Torching out a drier releases it's trapped moisture back into...
  3. You're probably right. :( It's already difficult...

    You're probably right. :(
    It's already difficult to teach "System Effect" to designers and installers. Code officials may never comprehend it.
  4. No, I was taking Rayr's word for it... ...

    No, I was taking Rayr's word for it...

    Wishful thinking get's me in trouble sometimes... I'm so gullible ;\
  5. JT, please enlighten me on the humor. I sometimes...

    JT, please enlighten me on the humor. I sometimes don't get it the first go round.

    I feel i'm out of the loop here <confused>
  6. Good thing! Is it a county or state code? I...

    Good thing!

    Is it a county or state code?

    I don't remember supply plenums being addressed in the International Mechanical Code book.
  7. All heating mode charging methods are guesses....

    All heating mode charging methods are guesses. Even weighing it in is only correct with at least one match up and rated CFM across both coils.

    Good advice given by Captaincompressor, I would only...
  8. Very nice ductwork! It appears thought was put...

    Very nice ductwork! It appears thought was put into this design to avoid "System Effect".

    15 degree or less evase on the first fitting and enough length for 100% static regain... CHECK!
    Turning...
  9. Isn't the 4011 a thermistor? A bit more accurate...

    Isn't the 4011 a thermistor? A bit more accurate but slower to respond? With a 80pk thermocouple you see right away when liquid floods back. No delay, and the accuracy of a 80pk thermocouple is very...
  10. Leaves his scent mark globally

    Leaves his scent mark globally
  11. Separated by the Appalachian Mountains

    Separated by the Appalachian Mountains
  12. Thread: Free Heating

    by penderway
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    717

    Well said (whoever said it), but the cost of...

    Well said (whoever said it), but the cost of shipping and handling can vary greatly on system matching, sizing, ducting and charging.

    Damage upon arrival is also way too prevalent. :)
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    I don't think piston size or a TXV is gonna fix...

    I don't think piston size or a TXV is gonna fix your issue.

    The metering device is typically sized to the compressor on a matched system, and #63 indoor piston doesn't seem abnormal for an r-22 2...
  14. Makes my belly hurt laughing

    Makes my belly hurt laughing
  15. Such a fact does not exist. Do a search for...

    Such a fact does not exist.

    Do a search for "furnace fan control" and an answer might be found. (along with a thermostat that has a fan "auto" and "on" switch)
  16. Can't give step by step diy instructions in this...

    Can't give step by step diy instructions in this open forum. "DANGER... WILL ROBINSON!"

    Apply for Pro Membership and a wealth of knowledge awaits. There are many seasoned and well trained...
  17. T-stat controls blower in cooling mode. In...

    T-stat controls blower in cooling mode. In conventional heating mode (non heat pump) the blower is controlled by the furnace.

    Thermostat has no reason to energise the condenser without the...
  18. Sure. I don't have anything negative to say...

    Sure.

    I don't have anything negative to say about the others. I just liked what I read about how it works.

    BTW: I'm diggin your username.... I'm a long time fan of the band KISS. Made me think...
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    So your head pressure is 50 to 60? That's only 16...

    So your head pressure is 50 to 60? That's only 16 to 22 degrees at saturation! I don't know what... but something else is going on here.
  20. Conventional wisdom is to not flush the coils...

    Conventional wisdom is to not flush the coils with chemicals. It's highly likely that some of the flush will remain in the nooks and crannies... flush the lines sets only. Use only nitrogen to blow...
  21. Thread: Wiring Fail

    by penderway
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    2,783

    The black leg of the left breaker is only fed by...

    The black leg of the left breaker is only fed by TWO strands!

    Wonder how long it took to trip?
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    Your discovery was a blatant mis-diagnosis, but...

    Your discovery was a blatant mis-diagnosis, but the contest was actually over 10-12-14 :(
  23. Replies
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    Shellkamp, I really appreciate you finding this....

    Shellkamp, I really appreciate you finding this. I'll make the necessary corrections.
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    Thanks, I limited the line sizes to cover just...

    Thanks, I limited the line sizes to cover just what is available as prefab "line set". I wanted to keep the calculator as simple as possible.

    For Larger tonnages the manufacturer will usually do...
  25. I just checked Rheemote.net and found that it...

    I just checked Rheemote.net and found that it has been permanently disabled.:gah:

    Oh well, there's more than one way to skin a cat... or get info.

    I'll bet RunDawg can get expanded ratings
  26. Ah... yes. (I need to get my money back from that...

    Ah... yes. (I need to get my money back from that Speed Reading course i took)

    Alright then, for a the right price, I will specify the nominal tonnage, a matching A-coil and the CFM setting :)
    ...
  27. You will find 75 -80 degree indoor air to be very...

    You will find 75 -80 degree indoor air to be very comfortable if it's dry in the summer, and 68 or less if it's humid in the winter.

    Great to know a blower door test was done. It appears that you...
  28. Thread: Bad judgment

    by penderway
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    584

    You're not alone... I consider it "continuing...

    You're not alone... I consider it "continuing education" (although the state contractors board does not) :(
    Even the school of "Hard Knocks" charges tuition.
  29. X2 on this. Precise HVAC engineering starts...

    X2 on this.

    Precise HVAC engineering starts with the Manual J. It gives you your sensible and latent loads. The Manuals S allows you to match your home to the most appropriate equipment.
    ...
  30. Thread: Vacuum pumps

    by penderway
    Replies
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    488

    I can't speak for kdean1, but he may agree that...

    I can't speak for kdean1, but he may agree that if you mainly do service, you tend to evacuate a lot of "moist" systems. Water + refrigerant = acid, so it's not good for your pump to have acidic oil...
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    Yes, you're right. There wasn't much summer left....

    Yes, you're right. There wasn't much summer left. It was only recently that I conceived of adjusting the ranges of normal operation for abnormal conditions. Abnormal conditions are what we service...
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    Well, no diagnosis errors were found but...

    Well, no diagnosis errors were found but improvements were made thanks to Grayed and ACFIXR. The prize is split between them.

    Thanks to everyone who participated.
  33. Try to anticipate what your mechanic will need...

    Try to anticipate what your mechanic will need next.
    If you find that you have nothing to for a while, familiarize yourself where things are in the truck\van.
    Study tool and part catalogs to...
  34. Replies
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    Gary, not at all, we both had a good idea at the...

    Gary, not at all, we both had a good idea at the same time. I was inspired by the Honeywell Service Assistant, which used a Palm device for troubleshooting. I think you should continue, improvements...
  35. Replies
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    JTrammel, Its funny you mention that. I have...

    JTrammel, Its funny you mention that. I have been looking into what it would take to learn actual programming, and it looks to be just as hard as learning electricity, air and refrigeration.

    Kids...
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    Good, I will make the change soon.

    Good, I will make the change soon.
  37. Replies
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    ACfixr and Beenthere, I have the vapor line >...

    ACfixr and Beenthere,

    I have the vapor line > ID dry bulb situation as an error and it halts the diagnosis. My assessment was that if this occurred, it was likely due to errors in measurements or...
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    I meant 2' net riser (not total). 1-1/8 is OK for...

    I meant 2' net riser (not total). 1-1/8 is OK for horizontal sections of heat pumps and down flow sections of air conditioners.

    If you changed the vertical sections from 1-1/8" to 7/8", you'd have...
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    JT, the 1-1/8" is ok for the horizontal section...

    JT, the 1-1/8" is ok for the horizontal section since it's pitched toward the condenser, just not for the vertical. If you replaced the vertical sections you'd be fine.

    Your total riser length is...
  40. Replies
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    a crankcase heater may prolong the inevitable

    a crankcase heater may prolong the inevitable
  41. Replies
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    Yes, compressors don't die young... they are...

    Yes, compressors don't die young... they are murdered!

    There maybe some other creative ways to achieve proper oil return besides running a new vapor line. Can't think of any the moment besides...
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    Great question, I am now also wondering...

    Great question, I am now also wondering...
  43. Replies
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    Yes. Beenthere is on target. here's a link to...

    Yes. Beenthere is on target. here's a link to Elitesofts HVAC Tools Demo. http://www.elitesoft.com/pub/demo/ht4setup.exe

    It will calculate pipe sizes in demo mode.
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    Hmm... IDK. I'll report it to...

    Hmm... IDK.

    I'll report it to spreadsheetconverter. They should have an update out in a few weeks. I'll recompile it then and we'll see if it corrects these browser issues.
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    I find that clips are an essential convenience to...

    I find that clips are an essential convenience to hopscotch troubleshooting. I keep one of these on one of my leads at all times....
  46. Replies
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    The Lineset Calculator can be found here...

    The Lineset Calculator can be found here http://efficientcomfort.net/asp/LineSetCalc_Web/LineSetCalc_Web.asp I haven't fully vetted all the sizing calculations yet. I think I can tighten them up...
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    9-10 seer CTD, typically under most conditions,...

    9-10 seer CTD, typically under most conditions, is 20-30, but under certain rare conditions, its "normally" lower than that. One condition for example is 78 ID @ 21% Rh & 96 OD. Like in Arizona
    ...
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    Are these old school mechanical stats? If so, I'd...

    Are these old school mechanical stats? If so, I'd suspect the heat anticipator as cause for high current. It's energized on a call for heat.
  49. I have a cooper SH66A-NIST that uses thermistors...

    I have a cooper SH66A-NIST that uses thermistors and a couple fluke 52II's with 80-pk thermocouple clamps. I have to say I prefer the super fast response of the thermocouples. The thermistor is a...
  50. Wow! forty plus years! I reckon they were sized...

    Wow! forty plus years! I reckon they were sized right, with adequate air flow, correctly charged, kept clean and unmolested... either that or the building has been vacant since the 80's :)
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