Cold weather kit on A/C ?

[jsfox]

Since we occasionally need to run our A/C when the outdoor temps are in the 40's it was recommended that we install a 'cold weather kit'. Sales guy didn't have a clue what exactly it was though. Can anyone tell me what it is? It will likely be going on a Lennox XC16.

Thanks,

[gevans]

I think you are looking for an economizer. This is an air damper that reads outdoor temperature. If your thermostat is calling for a/c, and the indoor temperature is higher than the outdoor temperature, the damper opens and you get outside air instead of refrigerated air.
Or possibly he means you need a crankcase heater on your a/c unit, so you won't damage the compressor slugging it with liquid refrigerant in cold weather?

[air2spare]

normally residential units dont run when its 40 degrees outside unless its a heatpump, otherwise you do need an outdoor fan cycling switch installed along with a crankcase heater for the compressor....heatpump should be factory setup already

[finest]

Most likely means some type of head pressure control along with a crankase heater, if its a rtu than a economizer setup should suffice.

[BaldLoonie]

Do ONLY what Lennox recommends! With R410a and 2 stage cooling, don't slap a simple fan cycle kit on.

[t527ed]

lennox lists a low ambient control and a low ambient compressor cut out as optional accessories for that model unit.

[Gunnery Sergeant Hartman]

Open a window...

[seatonheating]

Originally posted by t527ed
lennox lists a low ambient control and a low ambient compressor cut out as optional accessories for that model unit.

Beat me to it!!! That's what you want.

[amd]

Originally posted by BSCHVAC
Open a window...

I concur. There's almost nothing more wasteful than running residential A/C in cold weather.

[mayguy]

Originally posted by amd

Originally posted by BSCHVAC
Open a window...

I concur. There's almost nothing more wasteful than running residential A/C in cold weather.

I agree as well. Save on power plants, open the window if you are too hot with a house full of company, and run the fan.

[kelvin]

why do you need to run your a/c unit when it is 40 DEG F outside.

[docholiday]

Originally posted by kelvin
why do you need to run your a/c unit when it is 40 DEG F outside.

Growing lights in the basement??????

[air2spare]

Originally posted by docholiday

Originally posted by kelvin
why do you need to run your a/c unit when it is 40 DEG F outside.

Growing lights in the basement??????

is that experience talking?