unusual harmonic noises (humming or rattling)

How do I configure the TH6220U2000 for a heat pump with electric back-up

Enhanced Safety Logic: Integrated redundant solenoid design provides an additional layer of protection against unburned gas flow

a NEMA 4 or 4X version should be utilized

Flexible Scheduling: 7-day programming with early start functionality ensures the room reaches the setpoint exactly when scheduled

Intermatic WG1573-10D Motor 320074-702 unusual harmonic noises (humming orThe Intermatic WG1573 10D Motor is a high torque mechanical replacement engine engineered for 208 277V time switches. Designed specifically for the Intermatic T100 series, this 60 Hz heavy duty motor provides the necessary rotational force to manage heavy electrical loads up to 40 Amps in industrial and commercial environments. The Intermatic WG1573 10D features a robust steel construction and fixed tab connectors, allowing for a seamless swap out