I just installed he120 by pass humidifier upon start up motor turns real slow humistat is turned on to high and still same problem . this is first humidifier that i have installed and used so i do have some questions how fast should motor spin ? should motor spin when heating system is off ? how much water is sprayed into the heating duct ? will any parts or duct work rust from water ? thank you for your help pete @acelocksmith.com
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Re: motor turning real slow
THE MOTOR ONLY TURNS THE SPONGE DRUM AT MAYBE 10X'S PER MINUTE. THIS IS A BY-PASS TYPE HUMIDIFIER THAT RELIES ON YOU FURNACE BLOWER MOTOR TO SUPPLY AIR ACCROSS THE SPONGE MEDIA.
NOTICE THE 5"-7" ROUND HOLE MUST BE DUCTED TO THE PLENUM OR RETURN AIR. (IF MOUNTED ON THE PLENUM, THE HOLE HAS TO BE DUCTED TO THE RETURN AIR, AND VISA-VERSA.)
CAUTION!!!IF YOU HAVE CENTRAL AIR?
A "DAMPER" MUST BE INSTALLED AND KEPT CLOSED THROUGH-OUT THE "COOLING SEASON".
SERIOUS DAMAGE TO YOUR COMPRESSOR CAN RESULT FROM TOO COLD OF AIR ... CIRCULATING AND "BY-PASSING YOUR EVAPORATOR COIL".
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They are talking about the Humidistat which is separate to the Humidifier. Turn the power off to the furnace and that will disconnect any power to the humidifier. Turn the water off to the Humidifier if you have to remove it from the plentum. Then go ahead and install your new evaporator. If you are looking for the humistat follow the T-stat wire and see where it goes from the water valve of the humidifier...... But they may not have installed one and are useing a different way to turn the Humidifier on in the heating cycle.....
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This happened with my humidifier as well. When the mineral deposits build up to the point where the drum binds, and is difficult to turn, the gears on the motor will strip. The clicking you hear are the ends of the stripped teeth of the motor gear rubbing up against the mating gears. Suggest you pull the motor - just remove the wire nuts from the control unit (replace wire nut over the exposed 24 Volt wire on each as you do this), then loosen and remove the nuts on the inside of the unit holding the motor. A number of manufacturers offer 'clock motors' than have a 1 rpm speed, and flat slot to receive the drum spindle. I used a Loeb motor which is commonly available in hardware stores, and had to insert a couple of small washers as standoffs, so the coupler was the right distance from the drum spindle. Reattach the controller wires, and you're done.
Make shure the 24 volts is hooked up to power that is only powered up when the blower is running. Some furnaces have a HUM terrminal on control (make shure the HUM is 24 volts some are 120 volts then you must use the transformer supplied with the AP 600). You can use a RP # 50 relay that senses current only when the furnace motor is running on the heating speed. Hope this helps