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Air Conditioning question

M

Minerva

Platinum Member
This is called the condenser by most people and has a fan and compressor in it.

Now on the schematic there is a CCH part which is a crankcase heater. The heater on our unit is drawing 300 watts! Since we don't use the A/C ever in the winter wouldn't it save quite a bit of power to open the disconnect?

It is understood that the crankcase must be kept warm if the compressor is going to be run to prevent damage. So as long as we close the disconnect at least 12 or more hours before startup next summer things should stay hunky-dorie, right?

Obviously heatpumps must use the CCH all the time but in the case with an A/C unit this seems to be obvious! 300W is ridiculous.
 
WWYBYWB? 😛 There's some discussion.

Regardless, that's a good question. I'm having CAC installed this coming spring so I am curious also.
 
It will be no problem, and you don't have to warm it up excessively at startup either. The system is sealed, so no condensation will form. The parts will be normalized when you turn it back on, so there will be no problem.
 
Originally posted by: skyking
It will be no problem, and you don't have to warm it up excessively at startup either. The system is sealed, so no condensation will form. The parts will be normalized when you turn it back on, so there will be no problem.
Click to expand...
I'd assume its to keep the compressor's oil warm enough to flow well.
 
yep, but not a problem for a cold startup. the problems occur on a running pressurized unit, it tends to leak by and chill the heck out of the compressor between cycles.
 
Hmmm the CCH keeps the freon out of the crankcase oil?

These are tin cans so no sight glasses on the crankcase like a D-10 but if that crankcase is COLD you can bet your silly tomorrow that you got some foamin' action going on which is bad for that compressor!
 
The purpose of the CCH is to keep the liquid refrigerant out of the compressor cylinder. You can disconnect the power from the unit.
 
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