Rotor Installation Instructions
The CR500 Rotor is designed for residential and light commercial installations.
It is ideal for medium turf applications where heads are spaced from 30-50"
(9–15 m) on center.
Features:
• Three Body Styles: 5" Pop Up,
• Pre-installed Check Valve
12" Pop Up, & Shrub Version
• Universal Stator
• Top Arc Indicator for
• Standard Rubber Cover
Visual Adjustment
• Single Bore Orifice Prevents Clogging
• Slip Clutch
• Heavy Duty Retract Spring
• Automatic Arc Return
• Pressure Activated Seals
• 9 Interchangeable, Reusable Nozzles
• Heavy Duty Plastics Construction
• Part/Full Circle in One Head
• Robust Trip Mechanism
Nozzling Up The System
Nozzle number 2.5 comes pre-installed from the factory. A nozzle tree consisting
of eight additional nozzles is provided with each rotor (Figure 1). Please see the
nozzle performance chart for flow rates. By using various combinations of nozzle
flow rates and arcs, you can balance the sprinklers to achieve approximately the
same precipitation rates.
Every case of product contains two CR500 rotor keys (Figure 1). The CR500 key
is used to pull up the riser, to remove the nozzle, to reduce the radius and to
adjust the arc (Figure 2). Each use is described in the following instructions.
To Insert/Extract A Nozzle
Use the winged portion of the key to pull up the riser on the pop up version to
access the nozzle orifice. Insert the key into the pull-up hole (Figure 3), turn it 90º,
and pull up. Hold the riser in the pulled-up position.
Using the end of the key, turn the radius adjustment screw counterclockwise until
it clears the top of the nozzle (Figure 4a).
To remove the nozzle, insert the CR500 key into the slot at the top of the nozzle,
above the nozzle number. Exert pressure laterally while pulling on the key to
dislodge and remove the nozzle (Figure 4b).
To install a nozzle, press the nozzle into the nozzle socket. The nozzle number
should be visible and the nozzle prongs should be at 12 o'clock. Turn the radius
adjustment screw clockwise to its desired location (Figure 5) ensuring that it is in
a position to hold the nozzle in place even if radius reduction is not required.
CR500
Figure 1
Figure 2
Rotor Keys
P/N 102-1889
Radius Adjustment /
Nozzle Retention Screw
Arc Adjustment Dial
Nozzle Tree
Pull-Up Keyhole
Pointed Tip For
P/N 102-1992
Extracting Nozzles
To Set The Arc
The rotor is pre-set from the factory at 90º.
The CR500 rotor has a fixed LEFT stop. To find the left stop position, rotate the
nozzle turret clockwise (to the right) until it stops, then rotate the nozzle turret all
the way back to the left.
To increase the arc, insert the CR500 key into the arc adjustment slot, indicated
by an arrow in the center of the turret. Hold the turret in place while turning the
tool clockwise. Keep turning until the arrow points to the desired arc. The arrow
will point to the adjustable right stop. See Figure 6.
When the rotor is set at 360º, it will continuously rotate in a clockwise direction.
To decrease the arc, insert the CR500 key into the arc adjustment slot. Hold the
turret in place while turning the tool counter clockwise. Keep turning until the arrow
points to the desired arc. The arrow will point to the adjustable right stop.
To adjust the arc while the rotor is running, turn the turret gently in the direction
that it is spraying. Once the left stop has been located, follow the directions above
to increase or decrease the arc.
To line up the left stop with hardscape features which define the left side of the
irrigated arc, simply turn the pop up housing or the shrub base and point the riser
slot where the sprinkler should start spraying. You may also pull the pop up riser
with the CR500 key and rotate the LOWER part of the riser until the slot is at the
desired left stop position. DO NOT rotate the TOP part of the riser.
Installation Tips
The pop up version should be installed with the cap at the finished grade
(Figure 7). It is not designed to be installed below grade. The shrub version is
mounted above grade.
The radius adjustment screw can be used to reduce the radius of throw by up to
25%. You should note that this does not reduce the flow of the nozzle.
The screen can be accessed through the bottom of the riser. Remove the cap of
the pop up version and lift the riser assembly out of the housing can. The shrub
version can be unscrewed from the base. If plugged, the screen can be removed,
cleaned, and re-inserted into the riser.
The CR500 rotor has a universal stator which eliminates the need to regulate the
flow regardless of the nozzle used. There is a pre-installed check valve on the
CR500 rotor. Use of the check valve will eliminate low head drainage after the
zone has run.
Figure 3
Figure 4
a
b
Nozzle Performance Chart
Nozzle
Pressure
PSI
Number
30
.50
.75
1
2
2.5
3
4
6
8
40
.50
.75
1
2
2.5
3
4
6
8
For Product Inquiries:
Irritrol Systems USA
1-909-785-3623
TELEPHONE
1-909-359-1870
FAX
Irritrol Systems Europe s.p.a.
00-39-765-455201
00-39-765-455386
Figure 5
Figure 6
Left Stop
Fixed-Stop
© 2003 Irritrol Systems
Radius
Flow
Nozzle
Radius
Pressure
Ft.
GPM
PSI
Number
Ft.
28
0.5
50
.50
29
29
0.7
.75
31
32
1.3
1
34
37
2.4
2
42
38
2.5
2.5
40
38
3.6
3
41
43
4.4
4
46
45
5.9
6
48
42
8.0
8
49
29
0.6
60
.50
30
30
0.8
.75
32
33
1.5
1
35
40
2.5
2
43
39
2.8
2.5
41
39
4.2
3
42
44
5.1
4
49
46
6.0
6
49
45
8.5
8
50
TELEPHONE
FAX
Shrub Rotor
5" Pop Up
Rotor
12" Pop Up
Figure 7
Right Stop
Adjustable
Stop-Return
Point
Form Number 373-0153 Rev. C
Flow
GPM
0.7
0.9
1.6
3.0
3.2
4.6
5.6
6.3
9.5
0.8
1.0
1.8
3.3
3.5
5.0
5.9
6.7
10.0
Rotor