Ive heard variable speed HVAC units sometimes cause RFI. Does anyone have experience or knowledge about variable speed pool pumps? Specific model Im looking at is Energy efficient Pentair VS Intellif
At my Florida condo QTH I found a lot of noise being generated by the pool pumps about 200 feet from my indoor antenna. The inverter responsible is from CES Water Quality in Jupiter, FL. The noise is
In all RFI cases that I have tracked down to VFDs (variable frequency / variable speed drives), the input line filter recommended by the drive manufacturer for EMC compliance had not been installed.
Input line filters can help a great deal. In addition, some type of filtering on the ground wire may also be needed because the line filters don't filter the ground wire. A large clamp on ferrite ove
WRONG -- sort of. The solution is multiple turns of the line cable wound through a large #31 ferrite core, NOT the ground wire only. In general, commercial line filters are effective ONLY if they are
Thanks, guys, for all the useful info. Taking Jim's comment "In general, variable speed motors should be assumed to be noisy until proven otherwise" I'm going to have to plan for that before doing th
Why use variable speed controller at all? Most systems that use motor controllers have 2-speed controllers as "standard equipment" and offer variable speed as an upgrade. I suggest that you try to
From what I saw when we replaced our heat pump system couple years ago the variable speed controller systems had a higher SEER rating than the standard controller systems. Folks trying to save $$ on
Good question. Thanks but the power situation in Turks & Caicos is very different from USA. Electricity is about $.48 PER KILOWATT HOUR! Whats yours? Pool alone presently costs almost $300/month for
Thanks Phil. My post that crossed with yours explains my unique situation. 73, Jim K4QPL VP5M Sent from my iPhone _______________________________________________ RFI mailing list RFI@contesting.com h
Funny you should ask... in San Diego it can be as high as $0.55/kWh depending on season, rate schedule, time of day and overall usage. But I get your point. New commercial buildings commonly use VFDs
Wow! Thats CA. Were on residential time of use here in NC and average for June was $.09 kWh or about 20% of VP5 rate! Ill deal with the RFI if I can just get my bill down some. Sent from my iPhone __
Our efficient home made going to a heat pump impractical. The break even pay back compared yo our "old" furnace" was close to 50 years, making the high efficiency heat & air conditioner more economi
At $.48/kwh does a properly designed (RFI-wise) solar system become a good economic idea? 73 - Jim K8MR _______________________________________________ RFI mailing list RFI@contesting.com http://list
Thanks for all the input. Weve now sorta gone off the trail into HVAC, economics and other side discussion. I think my post inquiring about specific pool pumps and related RFI issues has been covered
Yes, very much so. Only recently has the Canadian owned utility company monopoly even allowed homeowners to use solar to reduce demand on their inefficient diesel powered generating system and previo