Cycle Start Times; Station Run Times; Non-Et Based Watering Schedules - Rain Bird ET Manager Series Installation And Operation Manual

Cycle Start Times

Your ET Manager does NOT start a watering cycle; it
"enables" or allows the sprinkler controller to activate
the valves when watering is needed. Cycle start times
should be programmed into your sprinkler controller to
meet the needs of the site. You may program multiple
start times into your sprinkler controller. The ET
Manager will allow all cycles to operate.

Station Run Times

Station run times must be set in your sprinkler con-
troller so the valves will apply the correct amount of
water to your landscape. Your ET Manager "enables"
watering cycles to refill the plant root zone by applying
the Irrigation Amount. The station run times is the
time it takes for sprinklers to apply the Irrigation
Amount and is based on how fast the sprinklers apply
water (precipitation rate). Table 1 can serve as a guide
to determining station run times, given the precipita-
tion rate and the Irrigation Amount.
Precipitation
Rate (inches
per hour)
2.00
1.75
Typically Spray Heads
1.50
1.25
1.00
0.90
0.80
0.70
Typically Rotors
0.60
0.50
0.40
Table 1. Minutes of Station Run Times
Refer to Appendix V for information on calculating the
precipitation rate and station run times.
Note: Station run times may need to be adjusted based
on the uniformity of the sprinkler system.
Note: The total station run time may need to be split
into several cycles to allow the water to soak between
cycles.
26
Irrigation Amount (inches)
0.35" 0.50" 0.65"
Station Run Times
(minutes)
11 15 20
12 17 22
14 20 26
17 24 31
21 30 39
23 33 43
26 38 49
30 43 56
35 50 65
42 60 78
53 75 98

Non-ET Based Watering Schedules

If stations need to operate as programmed in the sprin-
kler controller, and NOT managed by your ET Manager,
the ET Manager can allow a period of time for the
sprinkler controller to water as programmed in the
Daily Window; found in the Water Window submenu.
Use a separate sprinkler controller program for non-ET
based watering schedules.
Rain Bird ® ET Manager Series - Installation and Operation Manual
3. Programming