Installation and Adjustment Guide. Hunter I-20 Ultra Rotors

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I-20 Ultra Rotors

INSTALLATION AND ADJUSTMENT GUIDE

The I-20 Ultra pop-up sprinkler should be installed at inished grade as shown in the illustration (Fig. 1).

Figure฀1

Arc Adjustments

Adjustable heads are preset to approximately

180 degrees. Sprinklers may be adjusted with water on or off. It is recommended that initial adjustments be made before installation.

1. Using the palm of your hand, rotate the nozzle turret counterclockwise to the left stop to complete any interrupted rotation cycle (Fig. 2).

Figure฀2

2. Rotate the nozzle turret clockwise to the right stop. The nozzle turret must be held in this position for all arc adjustments. The right stop does not change.

40˚

3. You can adjust to any arc between 40 and

360 degrees.

Minimum

Arc

360˚

Maximum

Arc

4. The wrench will stop turning, or

Figure฀3

there will be a ratcheting noise when the minimum arc of 40 degrees or the maximum arc of 360 degrees (full circle) has been reached (Fig. 3).

5. Insert the plastic key end of the Hunter wrench into the adjustment socket (Fig. 4).

Figure฀4

Increase฀Arc Decrease฀Arc

To Increase Arc:

While holding the nozzle turret at the right stop, turn the wrench clockwise.

To Decrease Arc:

While holding the nozzle turret at the right stop, turn the wrench counter-clockwise.

Each full 360 degree turn of the wrench decreases the arc 90 degrees.

Note: It is not necessary to disassemble the sprinkler to make arc adjustments.

Radius / Distance of Throw

1. Insert the hex end of the Hunter wrench into the nozzle/rangeadjustment screw

(Fig 5).

2. Turn the screw clockwise (into the stream of water) to decrease the radius, or counterclockwise to increase the radius.

Note: Reducing the radius more than

Figure฀5

25% will distort the even distribution of water. Turning the adjustment screw clockwise more than ive 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.

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INSTALLATION AND ADJUSTMENT GUIDE

(continued)

Nozzle Installation

1. Insert the plastic key end of the

Hunter wrench into the lifting socket of the sprinkler and turn 90 degrees.

Pull the riser up to gain access the nozzle socket

(Fig 6).

2. Using the hex key end of the Hunter wrench, turn the nozzle rangeadjustment screw counterclockwise

Figure฀6

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 socket

(Fig. 7). Note that the socket is angled up

25 degrees. Then tighten the nozzle range screw. The triangle on the rubber cover will always indicate the direction of the nozzle when the sprinkler is retracted.

Nozzle

Removal฀Post

2. Unscrew the body cap counter-clockwise and remove the internal assembly from the body

(Fig. 8). Once removed, rotate the nozzle turret to the right stop, screw the internal assembly back

Figure฀8

into the body with the nozzle aligned to the right side of the area you want irrigated. At this point you have realigned the right arc stop, you can now adjust the left arc to an appropriate setting.

Note: It is not necessary to dig up and remove the whole sprinkler to realign the right arc.

Adjusting the Flow

Insert the plastic key end of the

Hunter wrench into the FloStop low adjustment socket (Fig. 9).

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Turn wrench clockwise to shut off the low. Turn the wrench counterclockwise to turn the low back on.

Figure฀9

Figure฀7

Aligning the Right (Fixed) Side of the Arc

There are two ways to align the right stop.

1. Turn the whole sprinkler body assembly and the itting below it, left or right to the desired position.

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I-20 Ultra Rotors

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I-20 Ultra Rotors

I-10 REPLACEMENT PARTS

Item Description Catalog฀No.

1 Standard฀and฀Low฀Angle฀Nozzle฀Set฀(12)฀

2

High฀Flow฀Standard฀&฀Low฀Angle฀Nozzle฀Set฀(4)

3

Short฀Radius฀Nozzles

4

Universal฀Screw

5

Rubber฀Cover ADV฀(Black)

356605

444800

466100

120300

307900

฀

36V฀(Black) 308400

ARV฀(Purple) 297900

3RV฀(Purple)

ADV,฀ARV

298000

361400 6 Riser฀Assembly

36V,฀3RV

7

Check฀Valve฀Spring

8

Filter฀Screen/Check฀Valve฀Assembly฀(Black)

9

Check฀Valve฀Seal

10 Retainer฀Clip

11

Shrub฀Head฀Base฀for฀Check฀Valve฀Use

364700

235000

142300

101400

204900

234900

1.0

18' 2.0

18'

.50

1.0

2.0

18'฀RADIUS

18'

2

25'

25'฀RADIUS

3.0

3.0

.75

1.5

25'

.75

25'

3

1.5

4

5

1

6

7

10

9

8

11

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