Hunter Institutional series User manual

ARC ADJUSTMENT

The I-20 Ultra pop-up sprinkler should be installed at

nished grade as shown in the illustration (Fig. 1).

Arc Adjustments:

Adjustable heads are preset to approximately 180°.

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).

2. Rotate the nozzle turret clockwise to the right stop.

This is the xed side of the arc. The nozzle turret

must be held in this position for arc adjustments.

The right stop does not change.

To Increase the Arc:

1. Insert the plastic key end of the Hunter wrench into the

adjustment socket (Fig. 3 & 4).

2. While holding the nozzle turret at the right stop, turn the

wrench clockwise. Each full 360° turn of the wrench will

increase the arc 90°.

3. Adjust to any arc between 40° and 360° (Fig. 5).

4. The wrench will stop turning, or there will be a ratcheting

noise, when the maximum arc of 360° (full-circle) has been reached.

To Decrease the Arc:

1. Insert the plastic key end of the Hunter wrench into the adjustment socket (Fig. 3 & 4).

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

Each full 360° turn of the wrench will decrease the arc 90°.

3. Adjust to any arc between 40° and 360° (Fig. 5).

4. The wrench will stop turning, or there will be a ratcheting noise, when the minimum arc of 40°

has been reached.

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

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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%.

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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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

ow when the sprinkler is retracted.

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Caution: Turning the adjustment screw

clockwise more than ve full turns may

result in a lost radius adjustment screw.

www.HunterIndustries.com P/N 700053 LIT-053 4/07

Institutional Series™

I-10 & I-20 Ultra

Gear-Driven Sprinklers Institutional Series™

I-10 & I-20 Ultra

Gear-Driven Sprinklers

ARC ADJUSTMENT

The I-20 Ultra pop-up sprinkler should be installed at

nished grade as shown in the illustration (Fig. 1).

Arc Adjustments:

Adjustable heads are preset to approximately 180°.

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).

2. Rotate the nozzle turret clockwise to the right stop.

This is the xed side of the arc. The nozzle turret

must be held in this position for arc adjustments.

The right stop does not change.

To Increase the Arc:

1. Insert the plastic key end of the Hunter wrench into the

adjustment socket (Fig. 3 & 4).

2. While holding the nozzle turret at the right stop, turn the

wrench clockwise. Each full 360° turn of the wrench will

increase the arc 90°.

3. Adjust to any arc between 40° and 360° (Fig. 5).

4. The wrench will stop turning, or there will be a ratcheting

noise, when the maximum arc of 360° (full-circle) has been reached.

To Decrease the Arc:

1. Insert the plastic key end of the Hunter wrench into the adjustment socket (Fig. 3 & 4).

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

Each full 360° turn of the wrench will decrease the arc 90°.

3. Adjust to any arc between 40° and 360° (Fig. 5).

4. The wrench will stop turning, or there will be a ratcheting noise, when the minimum arc of 40°

has been reached.

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

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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%.

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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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

ow when the sprinkler is retracted.

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Caution: Turning the adjustment screw

clockwise more than ve full turns may

result in a lost radius adjustment screw.

www.HunterIndustries.com P/N 700053 LIT-053 4/07

Institutional Series™

I-10 & I-20 Ultra

Gear-Driven Sprinklers Institutional Series™

I-10 & I-20 Ultra

Gear-Driven Sprinklers

Institutional Series™

I-10 & I-20 Ultra

Gear-Driven Sprinklers

I-10/I-20 Ultra Low Angle Nozzle

Performance Data

Pressure Radius Flow Precip in/hr

Nozzle PSI ft. GPM

2.0

25'

27'

28'

30'

1.6

1.9

2.1

2.3

0.49

0.50

0.52

0.49

0.57

0.58

0.60

0.57

2.5

27'

30'

33'

35'

2.1

2.5

2.8

3.0

0.55

0.53

0.49

0.47

0.64

0.62

0.57

0.54

3.5

29'

32'

35'

37'

2.8

3.1

3.5

3.8

0.64

0.58

0.55

0.53

0.74

0.67

0.64

0.62

4.5

29'

32'

35'

37'

3.4

3.9

4.4

4.7

0.78

0.73

0.69

0.66

0.90

0.85

0.80

0.76

Note: All precipitation rates are calculated for 180 degree operation.

For the precipitation rate for a 360 degree sprinkler, divide by 2.

I-10/I-20 Ultra Low Angle Nozzle

Performance Data – Metric

Pressure Radius Flow Precip mm/hr

Nozzle Bars kPa m m3/hr l/min

2.0

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

7.3

7.6

7.9

8.2

8.5

8.8

9.1

0.33

0.36

0.40

0.45

0.48

0.52

0.55

5.6

6.0

6.7

7.4

8.0

8.6

9.1

2.5

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

7.9

8.2

8.8

9.4

10.1

10.4

10.7

0.44

0.47

0.53

0.59

0.64

0.68

0.72

7.3

7.9

8.8

9.8

10.6

11.3

12.0

3.5

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

8.5

8.8

9.1

10.1

10.7

11.0

11.3

0.58

0.62

0.68

0.75

0.80

0.85

0.89

9.7

10.3

11.4

12.5

13.3

14.1

14.8

4.5

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

8.2

8.8

9.1

10.1

10.7

11.0

11.3

0.71

0.76

0.84

0.93

1.00

1.06

1.12

11.8

12.7

14.1

15.5

16.6

17.6

18.6

Note: All precipitation rates are calculated for 180 degree operation.

For the precipitation rate for a 360 degree sprinkler, divide by 2.

I-10/I-20 Ultra Standard Nozzle

Performance Data

Pressure Radius Flow Precip in/hr

Nozzle PSI ft. GPM

1.0

30'

31'

32'

0.9

1.0

1.2

1.3

0.19

0.20

0.24

0.22

0.23

0.28

1.5

32'

33'

34'

1.2

1.4

1.6

1.8

0.23

0.25

0.27

0.30

0.26

0.29

0.31

0.35

2.0

32'

34'

36'

1.6

1.8

2.0

2.2

0.30

0.33

0.35

0.34

0.38

3.0

34'

36'

38'

2.0

2.4

2.7

2.9

0.33

0.36

0.39

0.38

0.41

0.42

0.45

3.5

34'

38'

40'

2.6

3.0

3.4

3.7

0.43

0.40

0.41

0.45

0.52

0.46

0.47

0.51

4.0

37'

39'

41'

42'

3.2

3.7

4.2

4.6

0.45

0.47

0.48

0.50

0.52

0.54

0.56

0.58

6.0

35'

40'

43'

44'

4.2

4.9

5.5

6.0

0.66

0.59

0.57

0.60

0.76

0.68

0.66

0.69

8.0

41'

44'

45'

47'

6.0

6.8

7.6

8.2

0.69

0.68

0.72

0.71

0.79

0.78

0.83

I-10/I-20 Ultra Standard Nozzle

Performance Data – Metric

Pressure Radius Flow Precip mm/hr

Nozzle Bars kPa m m3/hr l/min

1.0

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

8.8

9.1

9.4

9.8

0.18

0.20

0.22

0.25

0.27

0.29

0.31

3.0

3.3

3.7

4.1

4.5

4.8

5.1

1.5

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

9.4

9.8

10.1

10.4

0.24

0.27

0.30

0.34

0.37

0.40

0.43

4.1

4.4

5.0

5.6

6.2

6.6

7.1

2.0

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

9.4

9.8

10.4

11.0

0.33

0.36

0.39

0.43

0.46

0.49

0.51

5.5

5.9

6.5

7.2

7.7

8.1

8.6

3.0

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

10.1

10.4

11.0

11.6

0.42

0.45

0.51

0.57

0.61

0.66

0.70

6.9

7.5

8.5

9.4

10.2

10.9

11.6

3.5

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

10.1

10.4

11.0

11.3

11.6

0.54

0.58

0.65

0.72

0.78

0.83

0.88

9.0

9.7

10.8

12.0

12.9

13.8

14.6

4.0

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

11.0

11.3

11.6

11.9

12.5

12.8

0.66

0.71

0.80

0.89

0.96

1.03

1.09

11.0

11.9

13.3

14.8

16.0

17.1

18.2

6.0

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

9.8

10.7

11.3

11.9

13.1

13.4

0.87

0.94

1.05

1.17

1.26

1.34

1.43

14.5

15.7

17.5

19.4

21.0

22.4

23.8

8.0

1.7

2.0

2.5

3.0

3.5

4.0

4.5

172

200

248

303

352

400

448

11.3

11.9

12.5

13.1

13.4

13.7

14.3

1.05

1.14

1.29

1.44

1.56

1.68

1.79

17.4

19.0

21.4

24.0

26.1

28.0

29.9

Note: All precipitation rates are calculated for 180 degree operation.

For the precipitation rate for a 360 degree sprinkler, divide by 2.

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1PTU

ALIGNING THE RIGHT (FIXED) SIDE OF ARC

If the right side of the arc is not properly aligned, the results may

be a wet walkway or a dry turf area. The right side arc can easily

be realigned. One way to realign the right stop is to turn the whole

sprinkler body assembly and the tting below it, left or right to the

desired position. This may require temporary removal of the soil

around the sprinkler to allow you to grip the sprinkler housing.

Another way to reset the right arc is to unscrew the body cap

counterclockwise and remove the internal assembly from the body.

Once removed, rotate the nozzle turret to the right stop, screw the

TURNING FLOW ON OR OFF

Insert the plastic key end of the Hunter wrench into the FloStop® adjustment socket (Fig. 3 & 10).

Turn wrench clockwise to decrease or shut off the ow. Turn the wrench counterclockwise to

increase the ow.

internal assembly back into the body with

the nozzle aligned to the right side of the

area you want irrigated (Fig. 9). At this

point you have realigned the right arc

stop, and you can 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.

Institutional Series™

I-10 & I-20 Ultra

Gear-Driven Sprinklers