#4655 Aprilaire Manual Humidistat
For use with Aprilaire models 110, 112, 220, 224, 350, 360, 400, 440, 445, 445A, 448, 500, 550, 558, 560, 560A, 568, 700, 760, 760A and 768.
Can be wall mounted or mounted on return plenum (plenum cutout templet included).
For duct mount, locate at least 6"" upstream of humidifier, humidifier bypass ductwork or fresh air intake ductwork.
Designed for low voltage service to control humidification equipment.
An increase in relative humidity expands the nylon ribbon which opens the control switch to stop operation of the humidifier.
A decrease in relative humidity reverses the process and closes the control switch.
AirFilters.com
The Aprilaire 4655 Humidistat is designed for low voltage service to control humidification equipment and is for use with Aprilaire models 110, 112, 220, 224, 350, 360, 400, 440, 445, 445A, 448, 500, 550, 558, 560, 560A, 568, 700, 760, 760A and 768. The humidistat can be wall mounted or mounted on return plenum (plenum cutout templet included). An increase in relative humidity expands the nylon ribbon which opens the control switch to stop operation of the humidifier. A decrease in relative humidity reverses the process and closes the control switch.
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