help with an Rheem 90 plus

[jimdicksonok]

I'm having a problem with the accessory 110 power activation when the fan and heat is going sometimes it kicks the power on for the accessory for the humidifier and eletronic air cleaner but sometimes it doesn't. If I go in the house and bump the heat a few degrees higher the power switch kicks on. Does anyone know what the problem is or what could fix it? seems like when the fan is on it always should be activated??? HELP:cool:

[BaldLoonie]

The hum terminal requires the fire to be on. The EAC terminal should activate with the blower in any mode.

[jimdicksonok]

The hum terminal requires the fire to be on. The EAC terminal should activate with the blower in any mode.

Ok the fire is on and blower is blowing sometimes and it seems no to have juice than the next time I go out their it does, it seems to have an mind of it's own? An suggestions

[iwannahelp]

do the accesories always work when you bump the temp up or is that erratic as well? Do you have the hum and eac terminals? and are they hooked up?
is your stat two stage?

[jimdicksonok]

acc always come on when I bump it a few degrees. Not sure about 2 stage what do I need to check it? thx really do appreiate the help

[iwannahelp]

I was wondering if the system was wired properly. If the hum and eac terminals are present and wired correctly then it should work as you say. If it is wired incorrectly and you have a two stage stat that when your W2 terminal is energized the accesories would come on if wired to the W2 terminal. The W2 terminal only gets powered when the stat setpoint is raised about two or three degrees above room setpoint. If you have a mercury bulb stat, take cover off and see if you have two mercury bulbs instead of one. If you do then the bottom mercury bulb is W2 and your accesories may be powered off of that terminal which is wrong. If you have a digital stat then take cover off and see if any wires are hooked to W2 terminal on subbase. If so then the accesories are probably powered off of that terminal which is wrong. I hope this makes sense, because I just read it and I am wanting to kick my own ass for typing such a complicated reply.

[jimdicksonok]

Friend I think what you said is understandable I will look into all of it and let you know tomorrow, I do have digital and I really think that the acc 110 plug is not kicking on when the first stage is running only does when the second kicks on so were would I look for that hook up? Thx jim your a really big help...:D