I have installed an aprilaire humidifier and its time for the low voltage wiring. I am trying to wire the humidifier so just the blower comes on when there is a call for humidity. I am not using the duct mounted humidistat I am using a thermostat to sense humidity. There are 2 terminals on the thermostat for humidity and also 2 therminals on the humidifie for low voltage. So if i go from the thermostat to the furnace to R and G to the humidifire will that work? If so then will i need a relay so when the the furnace calls for heat and humidifer is running it wont short or burn somthing out?
In theory should work ..the idea is to run the humidifier in parallel according to the power source ..and serial with the low voltage thermostat ..so ..the plus on the humidifier to go trough the thermostat in order to have power on he right conditions ..but in the same time tide to the source in parallel to do not interfere with other wiring ..and also to run independently of the heater..The heater remaining just an option when needed..Its not rocket science ...
if you just want to run the humidifier...and you want to start on the thermostat command...just wire it with it ..and by pass the other circuit..They will run both ...but if you disconnect the rest ..it will just run what you want..when you will need the heater ..just reconnect it ..But if you want to run only when the thermostat kick in on certain temperature..you have to wire it with the thermostat ..If they will be 2 separate circuits ..there is nothing to worry about .. The thermostat already is wired to the power source in one end..and from it goes to the heater and such ..get another wire from that point and close teh circuit on the switch on .off..or directly to the power source . ..but in this case you need a separate switch to start and close ..if the operation will by pass the main switch ..if the main switch is not by passed..than you have to cut the heater avoid starting also ..if you just want to run the humidifier...and you want to start on the thermostat command...just wire it with it ..and by pass the other circuit..They will run both ...but if you disconnect the rest ..it will just run what you want..when you will need the heater ..just reconnect it ..But if you want to run only when the thermostat kick in on certain temperature..you have to wire it with the thermostat ..If they will be 2 separate circuits ..there is nothing to worry about .. The thermostat already is wired to the power source in one end..and from it goes to the heater and such ..get another wire from that point and close teh circuit on the switch on .off..or directly to the power source . ..but in this case you need a separate switch to start and close ..if the operation will by pass the main switch ..if the main switch is not by passed..than you have to cut the heater avoid starting also ..
Answers & Comments
In theory should work ..the idea is to run the humidifier in parallel according to the power source ..and serial with the low voltage thermostat ..so ..the plus on the humidifier to go trough the thermostat in order to have power on he right conditions ..but in the same time tide to the source in parallel to do not interfere with other wiring ..and also to run independently of the heater..The heater remaining just an option when needed..Its not rocket science ...
if you just want to run the humidifier...and you want to start on the thermostat command...just wire it with it ..and by pass the other circuit..They will run both ...but if you disconnect the rest ..it will just run what you want..when you will need the heater ..just reconnect it ..But if you want to run only when the thermostat kick in on certain temperature..you have to wire it with the thermostat ..If they will be 2 separate circuits ..there is nothing to worry about ..
The thermostat already is wired to the power source in one end..and from it goes to the heater and such ..get another wire from that point and close teh circuit on the switch on .off..or directly to the power source . ..but in this case you need a separate switch to start and close ..if the operation will by pass the main switch ..if the main switch is not by passed..than you have to cut the heater avoid starting also ..