Westinghouse 28426 Manual Online: Program Setting. • Press the PROG button to select Program 1 or Program 2. • While holding down the ON button press the westinghouse digital timer 28426 instructions westinghouse timer instructions tm201 westinghouse 28451 manual westinghouse digital timer instructions.Please help find the manual for this Westinghouse Time Clock I purchased four of the 28426 timers before Christ. Westinghouse digital time switch. use digital timer slide contact for Timer to set the current time while the time Westinghouse Timer Instructions Westinghouse Outdoor Timer Uses Manual.