Bryant 987M with all Evolution components. Is there a 24v or 120v "fan on" output for airscrubber?

sharroff

I have an Airscrubber that is currently wired to be always on in my Bryant 987M Evolution system. I just got the new bulb and catalyst assembly for the '2 year' replacement schedule.

As opposed to the Airscrubber being "always on", does someone here have a suggestion for how to connect it so it is only on when the blower is operating?

I see a EAC -1 terminal, but that is only rated for 1 amp.

I'm looking at the 987M board, I don't see a output for 24V (direct to air scrubber) or 120V (to power airscrubber transformer) that is only on when the blower is on. The idea of some kind of pressure switch or flow switch in the supply came to mind, but I wonder if there is an easier way?

EdTheHeaterMan

EAC terminal connection is what you want to use if you need to operate something when the blower operates for any reason. Heat, Cool, or Fan on sends 115 V power to those terminals. If you need ot operate something that does not need 115 V. power and you only need a switch to operate something like your air scrubber, then you need a relay to make the 115 v. power open and close a switch.

This RIBU1C relay is commonly used for that purpose.

There may be an easier way to operate your air scrubber If I knew the specifications of the device.

109A_5

Looks like EAC-1, EAC-2 is the intended connection points. If your Airscrubber draws more than 1 Amp you would need add relay to switch the higher current load. EAC-1, EAC-2 would control the relay, the relay would control the Airscrubber.

109A_5

109A_5