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From: John Mallinckrodt <ajm@cpp.edu>
Sent: Wednesday, October 27, 2021 1:08:33 AM
To: Phys-L@phys-l.org <Phys-L@phys-l.org>
Cc: Marx, David <dtmarx@ilstu.edu>
Subject: Re: Ex: Re: [Phys-L] global warming
[David Marx] /snip/. The ice core data does indicate that its been more than 800 000 years since the CO2 concentration was higher than 300 ppm.
Hopping on to the thread:
- My house had an outside 4 ton compressor unit installed in 1997. On Saturday afternoon, a rather warm day in SW Oklahoma, I noticed the room temperature was rising to 79 degF and took a look at the outside unit. Fan going? - check. Fluid pipes to inside evaporator cool? No! Compressor running? No!
- A cursory check showed power to the compressor at turn on, shortly followed by turn-off with unpleasant sound effects. This Lennox system has over temp, under pressure etc., etc. My best guess was not the usual - start run capacitor or start relay with the extra startup capacitor.
- The service rep showed up Monday morning, and clipped on a current probe - well over the rated compressor stall-current which is provided on a data plate for the purpose, as it turns out.
- So he ordered a compressor, and it arrived on Wednesday lunch time with a crew.
- I happened to be there at the moment of truth: a tech used a box wrench to unscrew the pressure line schrader valve cap for the mandatory pump out and recovery ~ and WHOOSH! - a six foot fountain of R-22 - something over 8 pounds were gone in a minute. They showed me the cap, stem with schrader valve still intact - the stem had wrung off the base, instead of just the cap off the stem.
- Unrecoverable. Three hours later, the new compressor was in, vacuum flush, new dryer/filter, new fluid installed - and they were gone - two trucks and five techs at the end.
- This was a rare failure, no doubt; and no chance to keep the freon from the Stratosphere. I later checked, 1 lb of freon is worth 1800 lb of CO2 in ozone destruction, so perhaps several tons of CO2 equivalent went up, like a couple of tons of best anthracite, burned smokelessly as yet one more contribution to Global Warning.
- Sad.