Mar 14, 2010 · a current sensing relay is used to determine if the furnace fan is running, and sends a (low voltage, in my case) signal. It is needed for an Aprilaire whole house humidifyer.

Dec 13, 2019 · The current sensing relay is only necessary when the fan is wired for 2 or more speeds and it's necessary to take power from there. Just wire the supplied 24v transformer in …

Dec 24, 2017 · I have everything installed with my Aprilaire 700m except the wiring. I have a Lennox ml195 furnace which contains a 120 VAC HUM terminal. The wiring diagram shows …

Feb 27, 2013 · I was thinking of using a current sensing relay to do this but the one I am looking at has a trip point of 1.5 amps which is greater than the current that the light will draw (0.4 amps). …

Nov 6, 2010 · Hi, just installed an Aprilaire 50 current sensing relay with my Honeywell HE360A humidifier. I can't seem to get this relay to work right. I have it on the main 120VAC lead to the …

Oct 25, 2020 · The current sensing relay does not connect directly to the wire it is sensing... it just senses the current flow (electro-magnetic field) and closes dry switch contacts when the …

Feb 10, 2012 · This switch provides power to the furnace but I think it is on all the time. I saw in another post (using a search for booster fan) that a relay can be used between the power wire …

Dec 2, 2019 · AprilAire recommends a current sensing relay in the neutral of the furnace fan. I think that's a bit honky since it'd run the humidifier on cool mode as well, requiring more user …

Mar 30, 2020 · installed a in duct dryer fan about a year ago and was never able to get the current sensing switch working; got a 2nd switch and it also did not work. Basically you run either "hot" …

Jan 26, 2012 · I am planning to install a current sensing relay in the wiring leading to my fireplace insert. The purpose of this will be to sense when the fireplace is on and its blower fans are …