WHAT IS A PROGRAM WATERING CYCLE?
When a watering start time is selected, that time becomes the beginning
of an automatic watering cycle. A watering cycle operates each station
assigned to the program, one by one, in numerical order. When setting
up watering schedules, it is important to remember that start times are
assigned to programs, not individual stations.
In the following example, (also shown on the sample watering plan on
page 9) we have set up Program A to start at 2: 00 a.m. and again at
3:00
a.m. on a 1-day interval (every day). Stations 1, 2, 4 and 5 are front
and back yard lawn areas which get full sun throughout the day. These
stations will run for 10 minutes each for a total of 20 minutes run time
per day. Stations 3, 6 and 7 are lawn areas which are shaded during the
afternoon hours. These areas require less water, so we have assigned them
to Program B and set them to run for 20 minutes on a 2-day interval
(every other day).
At 2:00 a.m., Program A watering cycle starts. Station 1 turns on, runs
for 10 minutes, and shuts off. Station 2 turns on, runs for 10 minutes, and
shuts off. Stations 4 and 5 operate sequentially in the same manner, each
running for their set run time. When Station 5 shuts off, the watering
cycle is completed for the first start time. At 3:00 a.m., the watering
cycle starts again and repeats the same station-by-station watering
sequence.
Note that we have 40 minutes total watering time per cycle in
Program A. If we had set the next start time at 2:30 a.m., the start time
would have been delayed until 2:40 a.m., enabling the first cycle to finish
as programmed. This function is called “start time stacking”, and can
occur within each program.
Watering programs, however, operate independently, which means that
two or more programs can run simultaneously. In our example,
Program B will also start at 2:00 a.m. Therefore, Stations 1 and 3 will
turn on at the same time, and Station 2 will turn on while Station 3 is
running. This feature enables more watering to be completed within the
prime “watering window”, which is generally between Midnight and
6:00
a.m.
Note: When scheduling watering programs to run simultaneously, it is
important to ensure the water supply has sufficient pressure and volume
to maintain optimum sprinkler performance.
8
Programming the Controller
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| Language | English |
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