Intermatic - FM1STUZH-240U - 24-Hour 208/240V Electromechanical Panel Mount Timer Module HVAC Automatic short circuit protection is

Automatic short circuit protection is a feature found in all Hunter AC powered controllers

and prevents it from going down your drainage line

low-power encapsulated solenoid with captured plunger and 90-mesh (200 micron) solenoid filter

Generates and traces 1Khz tracing tone

Another big advantage to the Pro900™ is its 2 inductive mode capabilities

Intermatic - FM1STUZH-240U - 24-Hour 208/240V Electromechanical Panel Mount Timer Module HVAC Automatic short circuit protection isSpec Sheet Install Manual Intermatic FM1STUZH 240U 24 Hour 208 240V Electromechanical Panel Mount Timer Module with Manual Override, 15 Minute Intervals, 21A, SPDT The FM1 series timer modules are designed to be integrated inside of a machine control panel, circuit board, or other equipment. They are a simple and low cost alternative for applications that do not require more than 21 A or 2 HP, 240 VAC. The FM1 is designed for 24 hour or 7 day control