does not deplete the ozone as R22 **supposedly **does.
What’s with this? Are you a non-believer?
I’m just not totally convinced of the effects of R22, or many other things, on the ozone layer.
And, judging from your post about chlorine, I don’t think you’re all that convinced, either.
Russel, when I described a heat pump system and gave some example numbers that was for the currently utilized R-22 refrigerant (most common for residential AC systems which replaced R-12) … which is still referred to as “freon” in the industry.
No later than 2010 equipment using R-22 will be phased out, and in 2020 R-22 will no longer be available … http://www.epa.gov/Ozone/title6/phaseout/22phaseout.html. It looks like R-410A (Puron is one brand) will be the replacement. But similar to other trade names that just stick (like Romex, Band-Aid, and Kleenex) it probably will still be called Freon … 
Ey Yi Yi guys. “Freon” is a term used by MANY people just like “Kleenex” is. Cool Down felllas;-)
[quote=dandersen]
I just tested a unit that had a 59 degree suction line at the condensing unit.
The refrigerant pressures were 82/255# psig. What does that tell you?
New construction Inspection.
No room for any more refrigerant here!!!
Shot that to hell with the last inspection!
Tell your teacher to go back to school! quote]
The temp. reading is taken at the Evaporator coil not the condensing unit. The coil itself is 40 degree. What he called super heat is the suction line outside the cabinet and it should read 50 degree. It seems to work on my system.
I diid point it skyward once…
Ah, but the difference is that Romex, Band-Aid, Kleenex, Yellow Pages, Bell Telephone, Xerox, and probably a few others, forgot to protect their trademark, or forgot to trademark it all. E. I. DuPont de Nemours & Company protected their Freon trademark, as do all corporations nowadays. All you had to do was watch Ellen Degeneres last summer and her few episodes on Jacuzzi to understand just how far corporations are willing to go nowadays to protect their trademarks and service marks. The corporate world learned from Yellow Pages, Kleenex, Xerox, et al. And they learned well.
I still call R-22 “freon” … and R-410A refrigerant too, but sometimes use “puron” for that. Bottom line is the numbers were for R-22, and a heat pump just cant keep up in very cold weather (unless it’s a deep geothermal heat pump, like those used in northern europe).
Russel, when I ship the harley out there this winter to get some good riding in, I will go with ya on an inspection for a house up in the cold mountains with a heat pump, and show ya what happens when you shut down the auxiliary heat and let it run for a while. You are buying the pitchers of margaritas afterward though (but we might need something a little warmer … like irish coffee) …
Were you born in Missouri … the “Show Me” state … 
Your gonna astonish R² again or maybe even flabbergast him with that statement. 
I’m not astonished, but Ms Margarita and Dr Cuervo are.
A heat pump works best when the temperature differential is the greatest, such as -40 outside and 140 inside, or 140 outside and -40 inside. They work less efficiently when it is 65 inside and 65 outside, or 25 outside and 25 inside, or 140 outside and 140 inside.
Try these links on heat pumps to better explain things Russel …
http://en.wikipedia.org/wiki/Heat_pump
http://www.eere.energy.gov/consumer/your_home/space_heating_cooling/index.cfm/mytopic=12610
This is from the second link by the U.S. Department of Energy …
Exactly.
Finally you are beginning to understand.
Glad we are on the same page now that while heat pumps can be very efficient in moderate climates, they just cant keep up in very cold weather … like when it gets down below freezing. Then the toaster wires kick in and the meter starts to spin …
???
My Heat Pump has a balance point (the temp where the heat escaping the house is equal to that which the heat pump can generate) is 17 degrees.
I modified my unit so the heat strips do not come on until that outdoor temperature is reached. Keeps them from coming on as my wife raises the thermostat up and down.
I knew you would get Robert and maybe even David to see it your way…
Among other things, I always take infra-red differential splits at the return air and all registers, and use them to arrive at an evaluation of the system(s). However, I’m perfectly willing to admit that I might be wasting my time, and would like someone to explain in simple terms why I shouldn’t take splits, so that I can better understand. Thanks.
Keith,
This thread is still active and has some good points.
Keith
There is absolutely no reason for you not to take splits if it works for you. If I have 55 degrees at the registers and 75 degrees on the return with good CFM from all registers that system does not get a lot of attention from me. What more can you ask for.
This TD thought has been beat up so many times in this organization and as long as there are two or more members it will never be one way or the other.
A couple of years ago I was involved in conservation with a hard headed inspector from Florida (Jerry Peck) about TD and he was very much against the idea. The argument continued for weeks and no one convinced the other Yea or Nay and it will be the same this time around. There are those that do and those that don’t. Just do what works for you.
I used to work on a lot of heat pumps in my other life and used to recommend to people in rural areas that air to air might be a solution to propane until I started thinking about the old formula (amps X volts= watts and watts is what you pay for and it just did not add up. Take a average 3 ton compressor pulling 15 amps operating in this area from late April to sometimes into late Sept the normal cooling season VS a 3 ton heat pump pulling 15 amps operating approximately 11 months out of the year and when ever the outside ambient gets down to 28 to 32 degrees you have this nice little heat strip that kicks in and draws another 25 amps on top of the already 15 amps of the compressor. Do The Math $$$$$$$ Do I like air to air heat pumps NOOOOO. Ground source heat pump closed loop buried at 5 feet in this area (Maybe to perhaps) I would have to run the numbers.
I installed Ground Source Heat Pumps in all the Western KY Schools. They save big bucks.
Look at what is happening.
Air-Air cools with 80-100 degree outdoor air. Heats with 65-0 outdoor air.
Geothermal; cools with 52-60 degree water, heats with 52-60 degree water.
There is less heat to cool and more to heat with. The compressor runs at the same amperage draw, summer and winter. There is no defrost cycle in geothermal.
Closed loop systems are a little less efficient than well water.
Water maintenance issues (pumps, filters, water contaminants ect…) require higher maintenance.
Remember, most Heat Pumps are used by those that have NO Choice as Natural Gas is not available and Propane is another issue they do not want to deal with.