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Type: Posts; User: hvac meister

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  1. Pulling refrigerant into condensing unit

    The guys I work with have differing opinions on pulling the refrigerant back into the condensing unit for quick repairs. This is concerning only residential split units. Not heat pumps. 2 to 5 ton...
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    It was a 10 year old rheem. Pretty standard, HSI...

    It was a 10 year old rheem. Pretty standard, HSI on the right, 6 in-shot burners and sensor on the left.
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    Flame sensor questions??

    I have 2 questions about flame sensors in residential furnaces maybe some out there can help me with. While doing a tune & clean on a furnace this week I hooked my meter in series with the sensor...
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    A restriction would cause the low suction...

    A restriction would cause the low suction pressure, but then I think the superheat would be high so I don't know. This is a 1999 Amana. Return air is 68 degrees with a 24 degree split. Very low...
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    Frosting suction line at condensing unit

    I'm stumped on this one. The suction line is frosting at the condensing unit. Residential 3 ton straight split a/c. Filter clean, blower wheel clean, condenser and evap coil clean. ( I cleaned both...
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    Ok,sorry, let me clairify. A TXV has a screen...

    Ok,sorry, let me clairify. A TXV has a screen which can catch debris. Same with a piston type. Is it ok to use a mild solvent? Or just use a soft brush and blow it out?
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    metering device cleaning

    What is the preferred method of cleaning a piston type metering device? What about a TXV? Seems we've had alot of problems with TXVs acting like there is a restriction but don't find anything. Any...
  8. Thread: LRA

    by hvac meister
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    1,241

    Sorry everyone.... I meant the RLA rating is...

    Sorry everyone.... I meant the RLA rating is 10.6. Rated Load Amps. Check out this link I found on an earlier thread... https://opi.emersonclimate.com/CPID/GRAPHICS/Types/AEB/ae1250.pdf
  9. Thread: LRA

    by hvac meister
    Replies
    10
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    1,241

    LRA

    On the condenser data plates you find the LRA. I assume this is the locked rotor amps. What exactly does this mean?? I had a small 1.5 ton unit today I'm pretty sure has a mechanical problem in the...
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    Thanks to all of you who have replied..... I must...

    Thanks to all of you who have replied..... I must admit tho, I'm not sure which of the replies I should believe since there are so many differing theories.
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    Are fuses in disconnect necessary??

    I've seen more often than not service disconnects without any fuses at all, simply a part that is pulled out. Of course down the line are circuit breakers. But why then do some have fuses and some...
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    Thanks for all the info and things to consider...

    Thanks for all the info and things to consider about this situation.
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    Correct superheat with a TXV

    This thread is in reference to residential split a/c units. I know with a TXV the charge should be checked and/or adjusted according to subcool. If working properly the TXV should pretty much hold...
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    Poll: Hang in there and best of luck

    Hope you feel the best real soon!!
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    Maximum pump-down

    Doing a pump-down in a residential split unit a/c, not heat pump, is there a maximum amount of refrigerant that can be safely held in the condensing unit?? I remember seeing some older Lennox units...
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    6,801

    No need to pull a vacuum????

    I was told by an old-schooler that if you are fast in cleaning out the screen on a TXV ,mechanical type not braze-in of course, there is no need to pull a vacuum on the system just as long as there...
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    It is the small tube coming off the TXV body

    It is the small tube coming off the TXV body
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    935

    TXV bypass

    What exactly is the function of the bypass on a TXV and how does it work. What if it becomes blocked? Or can this happen?
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    Thanks for the replies. Looks like it was a...

    Thanks for the replies. Looks like it was a combination of too many supply registers closed downstairs to force cold upstairs and partially blocked returns.
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    evap coil and line set freezing

    I was sent out for a coil that had frozen solid and can not figure out why. Customer had turned the AC off and and left blower on so by the time I got there it was completely thawed. OD temp at 101....
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    I actually had a CX who weighed in the proper...

    I actually had a CX who weighed in the proper charge according to the specs. Only problem was he had not recovered what was already in the system.
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    After checking the run cap on a blower motor and...

    After checking the run cap on a blower motor and forgetting to connect one of the wires, because the customer had interrupted me with some questions, I actually burnt up the motor. The loose wire was...
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    Multimeter that can also check microamps and...

    Multimeter that can also check microamps and capacitance besides all of the standard measurements. Of course I love my headlamp too....leaves my hands free to do the work.
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    Thanks for the feedback. The run cap and cond fan...

    Thanks for the feedback. The run cap and cond fan are ok. It is a straight cool, not heat pump. I did not try to pump it down. With your feedback and the guys at our shop we all agree it's a bad...
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    Low head pressure, hissing

    Had a scroll compressor today that made a hissing sound at startup. Head pressure was at 95 psi and suction side started at 60psi and slowly climbed to 70psi. This is an R22, 3 ton, residential unit....
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    business bookkeeping

    Just wondering if any business owners had any info on setting-up bookkeeping for my planned small HVAC business I hope to start next year.
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    Thanks for the quick and helpful responses....

    Thanks for the quick and helpful responses. 'preciate it.
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    2008 NEC Handbook is a monster!

    I have decided to start-up my own small residential HVAC company after working with a nationwide company for over 8 years. I have owned my own company before, altho it was a restaurant not an HVAC...
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    ductwork fabrication

    I was a maintenance and service tech with the same large company for several years but never had the need to build ductwork since our company kept the "installers" and the "service techs" work...
  30. How best to check a furnace for leaking carbon monoxide

    I've heard so many different opinions on how to check for CO. Is it best to check right at the supply plenum? Or at the closest supply register? Also, how long should the furnace be running before...
  31. Thanks again for the input. The youtube series is...

    Thanks again for the input. The youtube series is good... I too will be making a custom recovery/vacuum set-up. It'll be nice to always have everything together when I need it.
  32. Wow... thanks for the quick responses. Sometimes...

    Wow... thanks for the quick responses. Sometimes because of space a core removal tool can't be attached. What then? Also, how best to test gauges for leaks?
  33. Using nitrogen while brazing and pulling a vacuum

    I understand the importance of using nitrogen when brazing to eliminate that black build-up of "soot" on the inside of the joints. I personally did an experiment brazing with and without nitrogen and...
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