NTT03 24 Hour/7 Day Compact Electronic Immersion Heater Timeswitch 16(4)A load rating. 4 ON/4 OFF easy-set programme periods per day, 28 ON/28 OFF programmes per week. Shortest switching time 1 minute. Extra large Easy View screen with blue LED backlighting. Red LED Mains ON and green LED Output indicators for easy viewing. Large easy push programme buttons. Self-cancelling override button to next programme change. Optional 1 and 2 hour boost button. Automatic Summer/Winter changeover. 720 hours rechargeable memory back-up. Fits a standard flush or surface mount box min. 32mm deep.
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