Universal Devices ISY-994i Series, User Manual

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17.2.5 Program Example: Irrigate If Needed
The IF condition decides whether to water by comparing the Irrigation Requirement
balance to a constant. The user is responsible for setting this constant equal to Water
Applied per Irrigation Cycle, and updating it if they change the value of water that they
apply per irrigation in their own programs.
If
Time is 11:00:00PM
And Module 'Climate' Irrigation Requirement >= 0.50
Then
Set 'Front Yard' On
Wait 10 minutes
Set 'Back Yard' On
Wait 5 minutes
Set 'Back Yard' Off
Irrigation - Cycle Complete
Please note: If you are using an EZFlora device you only have to turn off the last station.
When you turn on the next station the EZFlora first turns off the current station then turns
on the next one. If you use an EZio device you will have to turn off each station before
turning on the next one.
17.2.6 Calculating the Station Run Time
In order to replace the water that is lost from the soil your station run times will need to be
properly calculated. Each type of emitter/sprinkler has a different amount of water that is
being delivered per minute/hour.
17.2.7 Initialize the Module
After you have installed the Irrigation Module the Irrigation Requirement variable will
most likely display zero. You will have to trigger a reset of the module variables to get
things going correctly. Below is a walk-thru of the steps to perform this reset. Please note:
If its the rainy season it may be difficult to tell if Irrigation Requirement is having an issue,
so its recommended this be performed anyways just after the first install of the module.