Quote:
Originally Posted by retiredguy123
Note that the 9 volt battery has nothing to do with the watering schedule. The battery is only used to program a new system when the house power has not yet been turned on. And then it is used by the contractor to program a new system on a house that has no power. It is not a backup power system. The 9 volt battery is optional and can be removed. A dead battery should have no effect on the watering schedule.
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Sorry to disagree, but the SOLE purpose of that 9 V battery is so that the programming is not wiped in the event of a power outage.
The 9 V battery WILL NOT run the irrigation system. Power to the house has to be on for the irrigation system to function.
That is why the lawn and landscaping is one of the LAST things that are done. At that point, the landscaping contractor will set up and run the system to make adjustments.
So, if you don’t want to install a battery in your controller you WILL loose your programming should your power go out during a weather incident….