Aprilaire Automatic Digital Display Modulating Control Package used with Model 801

Includes Modulating Humidistat, Duct Sensor, Blower Activation Relay and Outdoor Temperature Sensor The Model 63 Automatic Digital Modulating Control (ADMC) package is the recommended humidistat for the Aprilaire modulating steam humidifier, Model 801. The Aprilaire Automatic Digital Modulating Control (ADMC) is designed to be mounted on a wall in the living space. The ADMC provides precise humidity control by providing a variable output to the humidifier based on the difference between the set point on the control and the sensed humidity. The proportional band default is 5% RH and can be varied from 2% - 10% in increments of 0.5%. The Duct Sensor can be installed in the return duct and used as the controlling sensor or it can be used as a high limit sensor. When used as the controlling sensor the RH level in the return duct is communicated to wall mounted control. The wall mounted control will compare the RH from the duct sensor and set point from the control to modulate the output signal. When used as a ...