Nutter Quiz Questiion

[bornriding]

Please excuse me if ya'll have heard this one before.

Why do some manufacturers install 1 pole contactors on some residential systems ?
Was asked this by me tech ( my wife )

Oh yea, just asking, how many female service techs ya'll seen out there ??

Richard

[square2round]

Originally posted by bornriding
How many female service techs ya'll seen out there ??

Richard

Six years...one inside the company...zero outside.

[ricm]

I'm guessing that the one pole contactor was made to save money, because the compressor won't start if it gets only 120 VAC... The cost of springs, contacts, etc... is less than a simple buss bar on the second 'leg'.

If I'm wrong...








It's the medication I'm on....

[ricm]

No.... I meant... the cost of springs and contacts is not nearly as less than........... ah fer-gittit......

[joker1]

Crankcase heat

[ricm]

ummmm..... sorry Joker, you can have crank case heat with a two pole, one pole or three pole....

Don't mind me... it's the meds...

but how is that a potential reason? This old dog can learn new tricks....

[bornriding]

Am dissapointed in the lack of response, Oh well

Joker is right - one pole contactor used due to compressor winding used as crankcase htr.

Thanks all for yur response

Richard

[gruntly]

Originally posted by bornriding
Am dissapointed in the lack of response, Oh well

Joker is right - one pole contactor used due to compressor winding used as crankcase htr.

Thanks all for yur response

Richard

I'm always the late guy...

If I may add, I understood it started as a crankcase heater, trickle power through the start winding using the capacitor like a resistor (Did they have to have bleed resistors?)to warm the compressor up. But the contactors stuck for another reason...Cost. Not too many manufacturers use the start winding heater theory anymore if any. Modern caps and windings probably can't take it.

I always thought it interesting that some older Carrier 3ph units used a 2 pole compressor contactor and wired the 3rd direct...not for the same reason as above of course. I always thought it was kind of dangerous and stupidly cheap.

[hvacker]

Those things kill people.

[Green Mountain]

I don't get it.

and

Two. Marylyn Roth was President of Syracuse RSES a number of years ago.

[Green Mountain]

I don't get it-------if you are using one leg of the power for a "trickle charge" where is the completed circuit.

[Special Ed]

On older systems they wire the CCH to both sides of the buss bar on single-pole contactors thereby making a complete circuit.

I still don't understand how that's supposed to work....

[ricm]

Been around a few years, I'm wracking the single brain cell left... maybe Bornriding can explain the exact science of that.... or mayby NormChris...

Support the claim, just don't repeat it.... I'm listening.