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  1. What were your pressures? Air cooled? Cycling...

    What were your pressures? Air cooled? Cycling cond fan? Headmaster?

    Head pressure change? We're you measuring at the comp leads or breaker?
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    Agree

    Agree
  3. Replies
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    You are reading a voltage drop across a load like...

    You are reading a voltage drop across a load like a CCH, wired to line side of contactor. Meter making the circuit, or grounded side of control transformer.
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    Old rule of thumb! RA=, 1 sq ft/ton@400cfm/ton

    Old rule of thumb! RA=, 1 sq ft/ton@400cfm/ton
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    Nail head, meet hammer, ;-)

    Nail head, meet hammer, ;-)
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    2,484

    Thought we were talking a/c, my bad.

    Thought we were talking a/c, my bad.
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    Remember, more moisture removal=less dry blub...

    Remember, more moisture removal=less dry blub temp split. (latent vs sensible stuff)

    That said, generally, slightly low sub cooling and slightly high superheat
    = slightly low freon. Ya, need wet...
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    Does not compute........ Adding heat to evap...

    Does not compute........ Adding heat to evap increases subcooling?
  9. Replies
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    2,745

    newbie here, common suction? How is the oil...

    newbie here, common suction? How is the oil separator piped and is the oil pressure switch wired correctly? Unloading? Staged? Pump down or selinoid drop? Just thinking out loud.
  10. Manufactures could care less how hard it is for...

    Manufactures could care less how hard it is for you to get that info. They would rather you sell a unit.

    Careers are made at the factory level by saving a nickel per unit.

    Another question,...
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    high superheat an low SC,,, add two lbs and get...

    high superheat an low SC,,, add two lbs and get back to us. Remember a txv is a constatant superheat device, if you add freon and the SH starts going down, you were flashing in the LL . 40 ft is...
  12. Thread: AC Tune Up

    by Senior1
    Replies
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    7,704

    feast and famine, nature of the beast, did it for...

    feast and famine, nature of the beast, did it for decades, save in the summer, hunt n fish in the spring fall.

    We even hade one tech that would go to job sites and let freon out systems so he...
  13. Walmart window unit in the bedroom is your...

    Walmart window unit in the bedroom is your friend. I keep an old one in the garage, same price as putting wifey up in a motel for one night.
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    Hygroscopic =hyDroscopic, damn computer!

    Hygroscopic =hyDroscopic, damn computer!
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    2,141

    Which is the reason I recommend HOs that have a...

    Which is the reason I recommend HOs that have a good r22 system keep them. POE are bad juju with moisture. Did anyone mention POEs are 5 times more hygroscopic as mineral oil. (or was that 10 times)
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    You are correct, same in the south. Clean the...

    You are correct, same in the south.

    Clean the cond/evap/blower wheel of an old system, you just saved the same amount as new system. (all else being same, correct charge, air flow,etc.)

    I have...
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    LOL,,that made me laugh, I remember a GE RTU,...

    LOL,,that made me laugh, I remember a GE RTU, about 50 ton HP in the 80's or so, opened the panel and all black wires with 30 relays:gah:
  18. Thread: AC Tune Up

    by Senior1
    Replies
    123
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    7,704

    Yep, big company I worked for had high school...

    Yep, big company I worked for had high school kids doing PMs, and polishing the OD unit so it looked like they did something. Old people, I do many for free on my time.
  19. Thread: AC Tune Up

    by Senior1
    Replies
    123
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    7,704

    Heating,,, gas,,,,PM? Yes, Have a good night ;-)

    Heating,,, gas,,,,PM? Yes, Have a good night ;-)
  20. Thread: AC Tune Up

    by Senior1
    Replies
    123
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    7,704

    Delta t CHANGE on a known working system is good...

    Delta t CHANGE on a known working system is good info for the home owner to monitor THEIR system, any change, call me.

    The problem is we techs have been pushed to SELL, SELL,SELL! The high seller...
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    LOL,,, I have seen leaving the txv bulb hanging...

    LOL,,, I have seen leaving the txv bulb hanging out in the attic considered a fix by some:gah:
  22. Thread: AC Tune Up

    by Senior1
    Replies
    123
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    7,704

    Forgot to add, I have seen just as many new...

    Forgot to add, I have seen just as many new system failures as old.
  23. Thread: AC Tune Up

    by Senior1
    Replies
    123
    Views
    7,704

    You just stated the problem, most RESIDENTIAL...

    You just stated the problem, most RESIDENTIAL PM's are for cash flow only. I'm sorry to jump in late, but I agree with Flash, I also have over 20 yrs exp.

    If you have an old draft type gas...
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    Heat rise is good for ele heat fan coils except...

    Heat rise is good for ele heat fan coils except in the summer. If its 95 outside and you are troubleshooting, last I want to do is heat the customers already hot house up more. I have a electronic...
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    Carrier heating check chart, model will change...

    Carrier heating check chart, model will change info of course.

    http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/38ydb-1xa.pdf


    Ps, read small print
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    Can it count towards CE credits I am required by...

    Can it count towards CE credits I am required by state to pay someone for?
  27. Replies
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    1,187

    He said another tech had been out last summer......

    He said another tech had been out last summer... Just saying
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    Cycling on low pressure switch?, there is a...

    Cycling on low pressure switch?, there is a screen on thr inlet of the txv, this can clog with trash causing your problem. If txv can be removed, clean it, if it's brazed in, you are going to need (a...
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    No insult intended, if you know this, but check...

    No insult intended, if you know this, but check your Gauges against a known pressure, (check temp of near full bottle of freon, convert to pressure, attach gauges
  30. Replies
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    Is this a matched system? (3 ton cond/evap,...

    Is this a matched system? (3 ton cond/evap, etc)Measure CFM at R/A and it sounds like oversized metering device plus low air flow in evap and Gage's/thermometer may be off.
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    Review on amazon : 3.0 out of 5 stars...

    Review on amazon :


    3.0 out of 5 stars disapointed
    book not what I anticipated, not much on refrigerated systems, good if you want to learn the overall operation on normal hvac systems....
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    If you are not using a digital thermometer as...

    If you are not using a digital thermometer as basic tool, you are a shade tree.
  33. Replies
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    This is for when charge is questioned. Dirty...

    This is for when charge is questioned. Dirty coils, non condensibles, etc will make all else guess work.
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    Name plate charge, recover, weigh in said amount...

    Name plate charge, recover, weigh in said amount plus any for lines over 15 feet. Old units, unit charge was figured using 25 foot line set.
  35. Thread: New Member

    by Senior1
    Replies
    15
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    3,684

    Just saying hi

    I remember working on R500 residential units.
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