[RFI] Followup; Shopping for new HVAC. Concerned....

[Charles Plunk]

I got my new HVAC unit this evening. York 14 seer gas/ac package unit, 
yep after rethinking decided to go with gas again for several reasons. /
/

/In heat mode I cannot find any RFI from it./**Its 21 degrees outside so 
will try the AC mode when it warms up. I've tried SDR and other 
receivers/antennas, nothing from it. So that, I suppose, eliminates the 
blower and exhaust motors. Yet to see about the condenser motor but this 
is looking good! The compressor is a constant speed scroll I think so do 
not foresee any issues there.

The unit does have a ECM blower motor. From what I have read just about 
all of them do across all brands nowadays.

So maybe I dodged the RFI bullet on this one. I had no extra filter 
added although York makes a "RFI kit" which was quoted at $189. After 
reading various info online, most of the success in mitigating the ECM 
motor RFI was by the use of toroids so decided against the filter. I 
knew I likely could get the contractor I decided to go with to add it if 
needed.

If I get RFI from the AC, will report it here. But right now, looking 
good! Transmitted around at various frequencies at 100w(no amp here) and 
no noticeable effects to the unit.


Found some info here looking around; 
https://community.flexradio.com/discussion/7839514/furnace-blower-rfi-suggestion

73

Chuck
W4NBO



On 1/23/22 16:46, Charles Plunk wrote:
> Shopping to replace my 25 yr old 2.5 ton 80kBtuh gas fired all in one 
> package heat/air unit for my small 1250sq ft brick house. I sure hate 
> to give it up. RFI free and never called anyone to fix it. I always 
> cleaned it myself. Heat exchanger shot so its time i guess. Relatively 
> mild winters here so thinking about a single stage heat pump. I just 
> don't like gas and we have no other gas appliances in the house thus 
> paying a minimum gas bill probably 6-8 months out of the year, money 
> wasted.
>
> I have contacted a contractor that I use to use when I was at the 
> local hospital working 19 yrs as maintenance manager. After reading 
> over archived posts of this board, I told them I wanted one with built 
> in RFI suppression or a optional kit and told them why. By reading it 
> seems they all have variable speed motors or PWM nowadays. But i also 
> read of success with #31 toroids. But I had rather have any factory 
> kit available installed on the front end.
>
> Any other suggestions?
>
> Thanks!
>
> Chuck
> W4NBO
>
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