The steps in programming a Noma water heater timer vary between model numbers. Generally, the steps involve pressing the timer's main programming button before selecting the required day, time and duration.
For models that have only two buttons, one for mode and one for time, press the "Mode" button before waiting for a flashing P to appear. Once it appears, press the "Time" button until the required start time displays. The appearance of a small dot next to the time indicates that it is set for p.m. Repeat the steps to set the required end time.
For models that have both a "Prog" and a "Mode" button, begin by pressing the "Prog" button to set the first event. Press the "Day" button to select the days that are required for the first event. Use the "Hour" and "Min" buttons to set the required start time for the first event. Repeat the steps to set the required end time.
For models that have a "Set" button, begin by pressing either the up or down button until "Prog 1 On" displays. Press the "Set" button before using the up button to select the start day(s) for the first program. Repeat the steps to program the required times for each individual day.