Program Modules: Defrost initiation is adjustable from 1-12 operations per circuit, per day; minimum 2 hours required between successive operations. Mechanical defrost termination is adjustable from 6-106 minutes in one-minute increments. Solenoid termination is optional. Instantaneous transfer if solenoid is energized at time of defrost initiation. Two SPDT snap switches per module. 3/16″ male push-on switch terminals. Switch rating: 10 Amps, 1/3 HP, 120-240V AC; 345 VA pilot duty.