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Type: Posts; User: penderway

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  1. Replies
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    Changing a Sporlan TXV powerhead is a simple fix...

    Changing a Sporlan TXV powerhead is a simple fix but it should only be done by a Professional. There is a very real risk of personal injury.

    Diagnosing by sound alone is merely a guess. You may be...
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    The dampers axle should have a "mark" on it's...

    The dampers axle should have a "mark" on it's end. If the mark is parallel with the duct, it is open. If it's perpendicular, it's closed.

    Per site rules, we aren't able to give DIY advice. I don't...
  3. X2 Just not an easy concept to explain. I...

    X2

    Just not an easy concept to explain. I think this 5:24 minute video does an excellent job.

    https://www.youtube.com/watch?v=CL5cgXwKUXc
  4. As-salamu alaykum...

    As-salamu alaykum
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    X2 Check for "side to side play" in the motor...

    X2

    Check for "side to side play" in the motor shaft. This would indicate worn bearings. This could be your intermittent failure. First the condenser fan goes out on internal overload and then the...
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    The drain should not plug up between annual...

    The drain should not plug up between annual maintenance visit. if it does, call them back out.
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    This is a result of the Master Bedroom not...

    This is a result of the Master Bedroom not getting enough airflow.

    If the Master Bedroom door is open or otherwise allowing an adequate path to return the air back to the fan/coil, then your issue...
  8. AEW and BeenThere are spot on but to elaborate...

    AEW and BeenThere are spot on but to elaborate further:

    Relative Humidity is the amount of moisture in the air compared to how much it could possibly hold at a given temperature.

    Air will...
  9. Condenser was 38 to 48 degrees above ambient?...

    Condenser was 38 to 48 degrees above ambient? This is not good.
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    Something is amiss with the numbers you posted. A...

    Something is amiss with the numbers you posted. A 97* condenser with 11.4* subcooling gives you an 85.6* liquid line. You cannot have a liquid line that is colder than the outdoor temperature (95.5)...
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    The duct design and application is responsible...

    The duct design and application is responsible for making every room in the house the same temperature. It takes a precision engineered design, adherence to the plan and great workmanship to achieve...
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    A gross overcharge is one reason.

    A gross overcharge is one reason.
  13. Replies
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    1,446

    Is there an accumulator in the condensing unit?...

    Is there an accumulator in the condensing unit? The suction pressure will correspond to the temperature of the accumulator as long as it has liquid in it (saturation pressure/temperature...
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    I've seen larger AHU's that were an AHRI...

    I've seen larger AHU's that were an AHRI match to a smaller condenser, but never the other way around. I also have seen situations like yours where the system "worked" well enough to prevent customer...
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    Obviously, the capacitor was the reason for the...

    Obviously, the capacitor was the reason for the service call. As TACKERDOWN says, "The readings after the cap replacement would be helpful".

    As for the TXV... a loss of bulb charge or a broken...
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    448

    A negative superheat is not possible, check your...

    A negative superheat is not possible, check your thermometer and pressure gauge calibration
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    Get the indoor conditions at or below 88 dry bub...

    Get the indoor conditions at or below 88 dry bub and 80 wet bulb then use this Analyzer: http://efficientcomfort.net/asp/ACanalyzer_Web/ACanalyzer_Web.asp
  18. I have an online calculator that will tell you...

    I have an online calculator that will tell you your CFM/TON. It's derived from the Enthalpy Difference and is very accurate (uses latest formulas from ASHRAE). You just need Wet Bulb, Dew Point or...
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    If you're not already on the lowest speed for...

    If you're not already on the lowest speed for cooling, do you have to change to motor just to lower the speed when you want to?

    Is manually (or with a relay) changing the speed tap not an option?
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    It is GREE, a Chinese company and the largest...

    It is GREE, a Chinese company and the largest manufacturer of A/C units in the world.

    I recently spec'ed and helped install an Ameristar condenser and coil. It was purchased from an American...
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    For our personal systems I'm all for guessing at...

    For our personal systems I'm all for guessing at a low temperature. If we wake up to a cold house, we can just bump up the change over temp.

    Guessing at a high temperature for our customers...
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    You are also correct, but... A Master HVAC...

    You are also correct, but... A Master HVAC Tradesman license is obtained by taking an open book test that 90+% pertains only to code issues and not about how electricity, refrigerant or airflow...
  23. Replies
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    Impressive! Are you in a Union? What state are...

    Impressive! Are you in a Union? What state are you in? Surely not Virginia, here all you need is the EPA certificate and voila!... you're an HVAC Technician... learning (and hacking) as you go. :(
  24. Thread: Txv question

    by penderway
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    613

    Thanks for getting me to rethink this. I agree...

    Thanks for getting me to rethink this. I agree now that a R410a TXV with R22 will swing open way more than it should. May not flood under all conditions but will definitely cause a removal of...
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    Rookie??? I think not! I say your post is...

    Rookie??? I think not!

    I say your post is worthy of "Professional" status. You must have had an excellent electrical education. In many ways the understanding of "Electrical" flow can be applied...
  26. Thread: Txv question

    by penderway
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    613

    I've just been overwhelmed with work, family etc....

    I've just been overwhelmed with work, family etc. You know how it can be.

    Txv's use the suction pressure along with the spring pressure against the bulb pressure.

    I've never done or seen a 410a...
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    In many cases with older systems... they worked...

    In many cases with older systems... they worked well enough in the beginning, even if they never had the correct airflow to begin with that would support the equipment's rated capacity.

    Over-sized...
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    See if this diagram helps. Basically if any...

    See if this diagram helps.

    Basically if any safety switch opens (HPC, S1, S2, S3), the current will follow the path of least resistance and energize the lockout relay(LO). Even if the safety...
  29. Thread: Txv question

    by penderway
    Replies
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    613

    I've never done it or seen it, but because of the...

    I've never done it or seen it, but because of the great difference in operating pressures... I'm sure a 410a txv with r-22 refrigerant will act like a restricted/non-opening txv. The spring pressure...
  30. Thread: What the...?

    by penderway
    Replies
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    945

    Hey Vin. I use a fluke 52-II with two 801-pk...

    Hey Vin. I use a fluke 52-II with two 801-pk thermocouple clamps (fast response) for pipe measurements.

    For refer pressure... 1% accurate analog gauges by Ritchie Yellow Jacket (which I keep...
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    Maybe you mean uno... number "one" in spanish. ...

    Maybe you mean uno... number "one" in spanish.

    I want a Unosex bathroom! :)
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    All the bathrooms in my house are unisex, no...

    All the bathrooms in my house are unisex, no problems so far...
  33. Thread: What the...?

    by penderway
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    SMAN460 and SPD2 measurements may be valid but...

    SMAN460 and SPD2 measurements may be valid but their calculations and diagnostics cannot be relied upon.
  34. Replies
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    Do a handstand against the building, breath deep...

    Do a handstand against the building, breath deep and exhale until you feel better... careful that your arms don't give out and you break your neck. :grin2:
  35. ... and he ended his TV interview with... "Hi...

    ... and he ended his TV interview with... "Hi Mom"

    But we all know who shares the credit! :)

    Way to go Dad!!!
  36. Replies
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    I practiced with the smallest drill bit I could...

    I practiced with the smallest drill bit I could find. I've never attempted a 1/8" hole in aluminum. The solder is very runny. For a big hole, I would apply a piece of aluminum as a patch.

    It...
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    X2

    X2
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    I've used the kit from Harris and also the kit...

    I've used the kit from Harris and also the kit from Uniweld. Each is a bottle of flux and a coil of solder.

    Another tip: Apply the solder as the flux starts to boil. Don't heat the leak area...
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    Allow at least 5 minutes for system to respond,...

    Allow at least 5 minutes for system to respond, if not... Honeywell has a 1-800 customer line. It should be buried somewhere in the install manual.

    P.S. Very Very Important!!!

    Don't throw that...
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    Am I the only one who solders these? It is...

    Am I the only one who solders these?

    It is tough to control the heat. You have to get the aluminum hot enough the melt the solder but not too hot for to long which evaporates the necessary flux....
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    A square-to-round would be the best fitting....

    A square-to-round would be the best fitting. 19x11 to 18" with a length of 2.5 equivalent duct diameters long (including the length of the heater bay). It's not a cheap fitting but at least the...
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    Proper Outlet Connections On most jobs there is...

    Proper Outlet Connections
    On most jobs there is not enough space at the fan outlet to install a straight duct that is equal to a 100 percent-effective duct length. However the duct designer and the...
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    Nice work but it looks as if your guys made an...

    Nice work but it looks as if your guys made an improper supply plenum.

    Here's a pic of what a proper supply plenum looks like. The AHU connection should be sized to dimensions of Blower opening...
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    The fact that the supply plenum is the size of...

    The fact that the supply plenum is the size of the cabinet and not the size of the blower opening is evidence that the blower chart (if found) will be useless. The 0.15"wc supply is most likely from...
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    The Nav51 has all the features and more than any...

    The Nav51 has all the features and more than any other clamp meter suggested already. It also has higher accuracy. I especially find it useful for measuring Power Factor. (15 out of 15 reviews, all...
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    All I know is that Warranty Exchanges over the...

    All I know is that Warranty Exchanges over the internet are cumbersome at best, otherwise nonexistent compared to over the counter at a local distributor.

    You just have to ask yourself... "Do I...
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    Policies can vary company to company, but as...

    Policies can vary company to company, but as you're accustomed to, "hand tools" are typically your responsibility.

    A good employer will allow you to purchase tools (on their account) from their...
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    Informative Post. Welcome to HVAC-Talk

    Informative Post. Welcome to HVAC-Talk
  49. Replies
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    To OP, AFAIK, no heat exchanger is designed to...

    To OP,
    AFAIK, no heat exchanger is designed to be absolutely "air tight" or to hold water without leaking. I say this because I was told of a sales tech removing and filling one with water to...
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    Absolutely! A dirty/damaged coil or blower...

    Absolutely!
    A dirty/damaged coil or blower wheel is the last correct answer I was looking for. Maybe there is something else IDK.



    That AHU was the Rheem "shorty" and yes, without a 9"...
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