Irritrol RainDial Programming Tutorial

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Here is a good tutorial on Irritrol RainDial Programming and Schedules.  It discusses how to program the Irritrol RainDial RD600, RD900, RD1200 series of controllers, provides links, videos, templates and guidelines.   There’s also a link to the programming guide and a great sheet to fill in when deciding what your program should be.

Irritrol RainDial Programming Guidelines for success: RD600, RD900, RD1200

  • Basic terminology:   Depending on your model, the timer can control 6, 9 or 12 “stations/valves.”   There are three “schedules“, A, B and C. Schedules define of the days, run times for each valve and up to three times you want that schedule to start running on a given day.
  • Many times people mistake the AM for PM; the difference is very subtle on the display.  This is my only real complaint about the Irritrol RD controllers.  Double check that the current time and the programmed times are correct.
  • The 2nd start time should never start before the first run is finished.   Add up the times assigned to each valve station.)   Never let start time plus the total run time be finish after the have a 2nd start time occur before all the valves from the first start time can finish.
  • Avoid allowing times to cross midnight (into the next day).
  • When using multiple schedules, make sure they will never overlap their schedules at all.   e.g., if you have schedule A as a “skip-day” schedule running every other day AND you have schedule B running on Wednesdays, they will eventually both run on Wednesday.  Thus, make sure schedule B can run and complete before schedule A runs.   (e.g.., set one for mornings and the other for evenings. )
  • RECOMMENDATION: Fill out the template shown below before you start – it makes things very easy.
  • Convention note:  The terms station, valve and zone are considered the same. Each valve has a number associated with it (e.g., 1-6 for an RD600, 1-9 for an RD900.

Important things to understand about the RD600 and other Rain Dial series timers:

  • Understand the basics of Irritrol RainDial Programming and Schedules:
    • The timer is specifically designed to avoid having more than one valve on at a time.  This prevents the transformer from being overloaded so even if you do manage to program it for multiple valves to be on simultaneously, you shouldn’t do that. (Some people do run multiple valves at a time, but it’s not recommended).
    • It always turns on valves for the programmed duration in the numerical sequence (1, then 2, then 3…)  If 2 doesn’t have any time set for it, then it will be skipped.
    • Schedules A,B, and C are always followed, regardless of what the schedule the switch is pointing to.    I.e., if you set the switch on A, it will still run schedule B and C if they are programmed to run.
    • If you don’t want schedule A to run, you must set all the days in schedule A to off, or run-times to 0 minutes, or all start times to off.
    • Each  schedule works with valve run times and then you give it the time to start the schedule.
    • When the schedule starts, it goes to the first valve with time to run and waits.  when that run-time has finished, it goes to the next valve and runs it for the time assigned.   Thus, only one valve runs at a time.
    • Help with skip days:  This page gives you a good description of the skip days feature…

Irritrol RainDial PROGRAMMING GUIDES, Templates

For help programming the RainDial RD600-1200 series sprinkler/irrigation controllers, see the following Irritrol RainDial programming guide and then review the manuals above.

Here’s a PDF of the Irritrol Rain Dial programming template. guide, and example template.

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178 thoughts on “Irritrol RainDial Programming Tutorial

    • Hello,
      I would suggest programming the timer so that you don’t have two valves running at the same time to allow for better water pressure. You typically should not have two valves running at the same time, and usually the timer will prevent it.

  1. Hi, my RD98 is not working. I had called them, and they said that it would likely be circuit problem. I when I try to manually run a sprinkler, the screen flashes kept flashing off. Can you fix this problem for me? If so, how much?

    • Hi Norman,
      That sounds like a problem we typically repair. I will send you an email with repair instructions. Thanks!

      Meghan – RainDial Doctor in Training

    • Hi Erin,
      Yes, you can turn off just one station. Just make sure you have 0 minutes programmed for that station on all programs (A, B, and C). To do this, put the switch to “Set Programs”, turn the dial to 4, and use the +/- buttons to make the time say OFF. Then, do the same for each program (slide the ABC switch to A, B, and C to make sure they all say OFF for station 4).

      Meghan – Rain Dial Doctor in Training

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  2. Hello,

    My display is completely blank. I changed the battery, and the display still didn’t come on. Could you please advise on what I should troubleshoot next? I am going out to buy a voltmeter, but i would think that if the battery doesn’t bring the display back up, then the issue isn’t the transformer. Is my thinking correct? Thank you, Paige

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