APPLICATION These damper motors are spring-return motors in tended for residential and light commercial damper applications. A 2-wits, fine voltage Thermostat or other fine voltages, psst controller must be used to control the M4JBA. A 24 V psst controller or thermostat without heat anticipation is respired to operate The MBABANE. The MDSE requires 24 V thermostat with a 0.75 A heat anticipatory adjustment. Each danger motor is supplied with a shaft coupling assembly and a crank arm assembly.