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1. Setting Internal Clock
Note: The internal clock is based on a 24-hour clock and is set to the nearest hour.
a. First, set outer black “Clock Dial” to the current hour.
b. Then, install 2 “AA” alkaline batteries in the battery cartridge holder located in the
bottom of the timer unit. “LOW BATT./SET CLOCK” indicator light comes on for
10 seconds. When “LOW BATT./ SET CLOCK” indicator light turns off the internal
clock is set.
c. To reset the internal clock remove the batteries for 1 minute and repeat the pro-
cess above.
WTA 1850 Operation Manual
3. Manual ON/OFF
a. With the “Duration Dial” in the “On” position, the unit will begin to water after 3
seconds and will water continuously until turned “Off.”
b. In the “Off” position the timer will not water.
4. Low Battery Detection
a. A flashing “LOW BATT./ SET CLOCK” light means that your batteries are running low.
b. The indicator light will flash until batteries are replaced or completely used up.
c. A rapidly flashing “LOW BATT./SET CLOCK” light means that your dials have been set improperly.
d. Remove the batteries for 1 minute and reset the timer.
2. Setting and Changing Programs
a. After having set the internal clock simply turn the black “Clock Dial” to the desired
start time.
Note: “Clock Dial” is based on a 24-hour clock, and start times are set on the hour.
b. Then, turn the inner “Duration Dial” to the desired length of time.
c. To change start times or duration simply reset the dials.
Rain Bird Sales, Inc.
Customer Support Center
6640 S. Bonney Ave.
Tucson, AZ 85706
1-800-RAIN BIRD
(520) 434-6289 FAX
©1999 Rain Bird Sprinkler Mfg. Corp.
Clock Dial
Duration Dial
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