1) Copy following link for programming manual and wiring Tork DTU40 40amp timer.
http://waterheatertimer.org/How-to-wire-Tork-DTU40-timer.html2) The timer mechanism is old Intermatic/Grasslin/GE discontinued model, and then newly re-minted by Tork in 2012. Timer has 1 year limited warranty against defects in workmanship. This timer is protected from surge by the reset feature, but can burn out in heavy surge event. Non-replaceable Internal rechargeable battery retains programming until timer is reset. Always reset new timer to delete trace memories.
3) This timer can be wired many different ways, and timer automatically detects voltage, so there are no dip switches to set. Timer must be wired before power is turned on. Do not spark-test across terminals.
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