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@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@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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>>
>>
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