System start up, Connecting hydraulic control tubing – Toro 880S User Manual
Page 4
Connecting Hydraulic Control Tubing
(Hydraulic Models Only)
1. Route control tubing from the
controller to the sprinkler location(s).
Note: Leave an 18" (45.7 cm)
service loop of tubing at each
sprinkler to facilitate movement of
sprinkler and service operations.
Refer to Table 2 for tubing run
length and sprinkler elevation
information.
2. Flush tubing thoroughly to remove
all air and debris.
3. Remove the tube retainer and poly
cap from the tubing adapter at the
base of the sprinkler.
4. Slide the tube retainer over the end
of the control tubing and attach tubing
to adapter.
5. Slide tube retainer over adapter area to secure tubing.
System Start Up __________________________________________________________________
The following is a recommended procedure that will protect system components during system start-up. The procedure is based on a
velocity fill rate of less than 2' (.61 m) per second. See Table 3 below.
Table 3: Recommended System Fill Rate
1.
Use jockey pump only to fill the system at a velocity fill rate of less than 2' (0.61 m) per second.
CAUTION: Failure to comply with recommended fill rate will increase line pressure resulting in a water hammer
effect that could damage sprinklers and piping components.
2. Use quick coupler keys at all tees and greens with quick coupler valves to bleed air from the system lines during the filling
process. For best results, do not compress air and then relieve it – bleed the air continuously while filling the system.
3. After water has filled all lines and all air is removed, remove the quick coupler keys.
4
Table 2: Hydraulic Control Systems
Maximum Distance
Type of System*
From Controller
Elevation Restrictions
Normally Open (01)
Valve elevation should not exceed
with 3/16" Control Tubing
500'
25' ABOVE controller elevation or
70' BELOW controller elevation.
Normally Open (01)
Valve elevation should not exceed
with 1/4" Control Tubing
1000'
25' ABOVE controller elevation or
70' BELOW controller elevation
* • All hydraulic connections on Toro valves are 1/4" insert type.
• Control line pressure must be equal to or greater than mainline pressure.
• Control line pressure range is 40 to 150 PSI.
Pipe Size
Flow
Velocity
Pipe Size
Flow
Velocity
in.
cm
GPM
LPM
ft/sec
m/sec
in.
cm
GPM
LPM
ft/sec
m/sec
1/2
1.3
2
7.6
1.60
0.49
3
7.6
45
170.3
1.86
0.57
3/4
1.9
3
11.4
1.92
0.59
4
10.1
75
283.9
1.87
0.57
1
2.5
5
18.9
1.50
0.46
6
15.2
150
567.8
1.73
0.53
1-1/4
3.1
10
37.9
1.86
0.57
8
20.2
250
946.3
1.70
0.52
1-1/2
3.8
10
37.9
1.41
0.43
10
25.4
450
1703.0
1.97
0.60
2
5.0
20
75.7
1.80
0.55
12
30.5
500
1893.0
1.55
0.47
2-1/2
6.4
30
113.6
1.84
0.56
WARNING
NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED,
DURING MANUAL OR AUTOMATIC OPERATION OR WHEN PERFORMING SPRINKLER SERVICE
PROCEDURES. DIRECT CONTACT WITH IRRIGATION SPRAY, A FAILED OR IMPROPERLY INSTALLED
SPRINKLER CONNECTION OR SPRINKLER COMPONENTS FORCIBLY EJECTED UPWARD UNDER
PRESSURE CAN CAUSE SERIOUS INJURY.