11
Programming limitations of this timer
The PC-104/106 series are very flexible timers available at a very economical
price. However, there are some things it will not do:
-It will not run more than one valve per station (i.e. two valves can't be connected to one termi-
nal/station);
-It will not run some stations on one set of days and some stations on another set of days. This
feature is called dual programmability.
-It will not run stations on separate start times. All stations will start on the same schedule.
-It is not designed for outdoor installation.
-It is not in a waterproof case, and will therefore be adversely affected by the climate, nor is it
electrically prudent to plug the transformer in an exterior outlet.
If you need any or all of these features, Rain Bird manufactures a variety of ad-
ditional models incorporating these and other features. Please contact your
dealer for details.
G
ENERAL
I
NFORMATION
What happens during a power failure?
In the event of a power failure, the emergency battery back-up will maintain the
watering program in memory for up to 24 hours. However, the battery will not
operate the valves. If the power is off for longer than the battery will last, the
entire program is lost and the entire display will blink after power is restored.
The timer is now operating in the default mode: eight hours after the power
came back on, each station will water for 10 minutes, every 24 hours. To
change this, just reprogram.
When is the best time to water?
The early morning hours -between 2 and 6 a.m. - are the best hours to water.
There is low evaporation very little wind, and water pressure is usually highest
then. Watering in the middle of the day tends to "scorch" the grass, and water-
ing in the late evening tends to "mildew” the grass before sunrise.
How long should the system water?
During hot weather, most lawns require ½” water every other day, or about an
inch and a half of water per week. Hotter climates require more and cooler cli-
mates require less. Sandy soils need frequent and greater amounts because of
excess drainage but clay soil needs lesser, more infrequent amounts to prevent
runoff. New lawns require frequent but short burst of water. See our special
"Watering Tips" brochure at your dealer, or check with your garden center for
local conditions.
Different sprinklers water at different rates. Sprayheads and bubblers water fast
(usually 5-15 minutes will put down ½”), but impulse sprinklers and rotors water
slow (usually 45-90 minutes will put down ½"). To check your watering rates,
place a flat bottom pan and measure the time takes to fill it.