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The only accurate way to determine when it would be more efficient to run strip heat vs the heat pump would be to determine the balance point of your house. AKA: at what temp your heat loss outweighs...

Cooling only: 9CQ or 12CQ

Heat Pump : 9RQ or 12RQ

These are all R-410a 115v rotary (non-inverter).

Grasshopper... That's some reeeeeal specific points you made about them being garbage.....:rolleyes:

All the Fujitsu Mini-splits manufactured for North America today use ROTARY compressors 9k-36kbtu The exception is the 42Kbtu unit (inverter scroll). Most are Panasonic Inverter rotary's, but a...

Thanks for the reply, I agree with using the right R-12 compresor, This is just a very strange, strange situation.

Back in the day, When a Copeland Semi had muliple applications (R-22 m/t, R-12...

I, for the life of me can't remember which way won't work. R-12 in an R-22 compressor, Or R-22 in an R-12 compressor?. All metering devices aside, I'm just wondering about the motor being...

X2 On the Fujitsu

I have used R414b "hot shot" for 4 years in systems ranging from 1/20hp to 2hp R134a and R12. In applications like freezers, ice machines, walk-ins, preps, and vechicle A/C. With no problems to date.

Obviously in high quantity any refrigerant will be harmful, but with 410a all it takes for me is something as small as line loss. I'm curious if it has anything to do with the R32 content in it.

I have a Jordon upright freezer from 1948 that uses a 1/4hp R22 condensing unit and a captube system.

Most manufacturers stopped using open drive systems on domestic in 1935.

There is a customer of mine that has had this exact problem. Just out of curiosity what size is your electric back up heat?.

Gord

I am a York dealer, there a revision for The 410a Affinity Units. For whatever reason someone at the factory wired some unit's high and low pressure switches backwards. In cold weather when the unit...

Has anyone out there experienced any sickness after exposure to R410a?. I'm not whinning, just curious if anyone else has had a reaction to it. I find after any amount of exposure to it, I get sick...

You can bet on the fact that it will have R12 in it. GE stopped using S02 in 1941. The unit should be marked with the refrigerant type, usually on a tag attached to the compessor or on the cabnet. ...

Is this just a gas/electric setup or is it a heatpump.

If it is a heatpump application with a gas backup, the refrigerant coils can be placed with no problem in the supply air as long as the...

Dave Lennox must be rolling over (and laughing) in his grave.

I know it was a long time ago but I was wondering how you made out with the evacuation and conversion. I've done a few of them. Gord

This compressor is rated as a; High temp R-134a, A Medium temp R-22, A Extended medium R-404 / R-507.

What's this about no less than 200 microns????

Oil doesn't boil in any micron range.

Yes Sulphur Dioxide and Methyl Chloride were the main refrigerants prior to 1935, but there were several others such as Methyl Formate which oddly enough ran in a vacuum on both high and low sides.
...

I should have stated that any sealant is a last resort as there should not be any leakage on properly installed gaskets.

A handy link is http://www.rsl.ca

click on the product link icon on the left of the screen
and there are about 80+ industry links.

Never ever use leak lock on a gasket, the best product out there for gasket sealant is made by Refrigeration Technologies and is called "Nylog".

It is available in CFC-HCFC and HFC applications...

That would be great if you have a pic, The literature that I have only goes up to 1934 and doesn't have any listings for an r12 unit.

A r12 unit would certainly make it more desirable to work on....

Equipment manufactures such as York install filter driers on the discharge line inches from the comp on split h/p's.

and no they're not mufflers.

House cost in Victoria, BC averages $400k cnd. union journeyman wage is roughly 75k cdn per year plus benefits and bonuses.