[RFI] Single stage HVAC with ECM

[Thomas Mills]

I agree with Steve.  I replaced my unit 3 years ago and after placing #31 cores on the motor wires no interference from the system at all.  My home has seen an improvement in air quality and overall conditions.
Tom
Wb4jwm 

Sent from my iPhone

> On Jan 8, 2021, at 1:28 PM, Steve Dyer W1SRD via RFI <rfi at contesting.com> wrote:
> 
> They are a much better matched to the airflow requirements of a well balanced HVAC system allowing for better humidity and consistent temperature control.
> It's not just about energy savings of the motor itself but of the whole system. Once we installed the new system, the house is quieter and more comfortable.
> So characterizing them as used just to meet federal energy standards doesn't really tell the whole story.
> Enjoy the 890!
> Steve
> W1SRD
> 
>> They are also more expensive and unreliable than PSC motors and probably will never pay for themselves in energy savings.  But they are designed to federal energy standards where cost to the consumer is of no consequence.
>> 
>> I recently had one fail in my heat pump.  After some heroic troubleshooting (if I do say so myself) I found a shorted winding in the motor and was able to pry the windings apart, clean off the carbon track and dab on some insulation.  I figured I saved $1K on a new motor and at least $1K in service charges.
>> 
>> Naturally, I used my $2K savings to purchase a $3K radio, a TS-890S.
>> 
>> Wes  N7WS
>> 
>> On Thursday, January 7, 2021, 5:03:12 PM MST, Steve Dyer via RFI <rfi at contesting.com> wrote:
>> 
>> 
>> Electronically Commutated Motor. And no, they aren't by design noisy.
>> Poorly implemented ones can be though!
>> I have several in my HVAC and they are quiet. The air handler blower
>> motor and condenser cooling fan are often ECM  in modern systems like
>> what K2KW is looking at.
>> 
>> 73,
>> Steve
>> W1SRD
>> 
>> On 1/7/2021 15:56, Jim Brown wrote:
>> > On 1/7/2021 1:24 PM, Kenny Silverman wrote:
>> >> If the units are single stage, is there less concern about RFI?
>> >
>> > If there is a variable-speed-contolled motor, there will be noise. I
>> > don't know what ECM is the acronym for. :)
>> >
>> > 73, Jim K9YC
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