Hunter Institutional Series Manual

RADIUS / DISTANCE OF THROW
Insert the steel hex end of the Hunter wrench into the radius
adjustment screw (Fig. 6). Turn the screw clockwise (into the stream
of water) to decrease the radius, or counterclockwise to increase the
radius. Radius can be reduced up to 25%.
Caution: Turning the adjustment screw
clockwise more than five full turns may
result in a lost radius adjustment screw.
PRECIPITATION RATE ADJUSTMENT
If you have excessively wet or dry
areas, you can change the nozzle
in the sprinkler to increase or decrease
the precipitation rate. For dry areas,
install a larger nozzle. For wet areas,
install a smaller nozzle.
NOZZLE INSTALLATION
1. Insert the plastic key end of the Hunter wrench into the
lifting socket of the sprinkler and turn 90°. Pull the riser up
to gain access to the nozzle socket (Fig. 8).
2. Using the hex key of the Hunter wrench, turn the radius
adjustment screw (Fig. 6) counterclockwise to be sure it
is not blocking the nozzle socket opening. If a nozzle is
already installed, it can be removed by backing out the
adjustment screw and turning on the water, or by pulling
outward on the nozzle removal post with a pair of needle-
nosed pliers.
3. Slip the desired nozzle into the nozzle socket (Fig. 7). Note
that the socket is angled up 25°. Then tighten the nozzle
range screw. The triangle on the rubber cover will always
indicate the location of the nozzle and direction of water
flow when the sprinkler is retracted.
Hunter Industries Incorporated • The Irrigation Innovators
www.HunterIndustries.com
Institutional Series
I-10 & I-20 Ultra
™
Gear-Driven Sprinklers
© 2007 Hunter Industries Incorporated
P/N 700053 LIT-053 4/07