Hunter Rain-Clik Product Information page 31

Wiring When Using Multiple Sensors
The Flow-Clik™ can be wired to a controller al-
ready using another Hunter sensor (i.e. Rain-Clik™,
Wind-Clik , Freeze-Clik , etc.) or other micro-switch
® ®
type sensors. It is important to make sure that, when
using multiple sensors, they are connected in series.
Hunter Controllers
Interface Box
SEN
W
SEN
Y
AC
Y
AC
Other Controllers
Interface Box
AC AC
Y
Y
W
System Considerations
Proper irrigation system design and operation assures
optimum performance of the Flow-Clik in monitoring
for potential high flow conditions. It is important to
understand that the Flow-Clik is primarily designed to
shut off the irrigation system in the event of a cata-
strophic system failure such as a main line or lateral
line break. However, depending upon the design of the
irrigation system, the Flow-Clik can offer increased
protection when components such as sprays or rotors
are damaged or removed due to vandalism. The follow-
ing may be helpful in making your Flow-Clik System
operate at its optimum level.
Proper Irrigation System Design
Generally, the Flow-Clik is designed to shut off the
irrigation system when a high flow condition is identi-
fied. A high flow occurs when the actual flow rate
through the system exceeds the "learned" flow of the
highest flow zone. If a wide variation in flow rates ex-
ist between the highest flow zone and the lowest flow
zone, the Flow-Clik may not sense an over flow condi-
tion if damage occurs within the low flow zone(s). For
example, if an irrigation system has a rotor zone that
operates at 18.9 GPM, and a drip zone that flows at
5 GPM; any damage to the drip zone components may
Mini-Clik
W
C 1 2 3
Mini-Clik
Common Wire
W to All Valves
Flow-Clik
not result in high enough flow rate for the Flow-Clik to
sense an over flow condition.
The more balanced the irrigation system is designed,
the more protection will be provided by the Flow-Clik.
Zones should be designed so that they operate at simi-
lar flow rates.
Note:
To assure proper operation, the flow for the highest
flow zone should not exceed 75% of the maximum
system flow.
Mainline Pressure Fluctuation
Some water sources may have varying pressure de-
pending upon the demand for water upstream of the
point of connection. During times of heavy demand,
system pressure through the mainline may drop. A
decrease in mainline pressure will result in a decrease
in flow rates throughout the system. If the Flow-Clik
calibration procedure takes place during a period of
time which pressure is at its lowest point, an increase in
pressure at the point of connection may result in system
flow rates that exceed the calibrated "high flow". As a
result, the Flow-Clik may shut the system down prema-
turely even though the system is functioning normally.
Note:
If pressure fluctuations at the point of connection
in excess of 10 psi are expected, it is recommended
that a pressure regulator be installed on the mainli-
ne or at the master valve.
Proper System Maintenance and Operation
It is important that your irrigation system be main-
tained and is functioning properly for optimum perfor-
mance. Check your irrigation system for any broken
components or leaks also, make sure that all sprinklers
are operating within the pressure ranges recommended
by the manufacturer.
Note:
Before calibrating the Flow-Clik to your system, it
is very important that the irrigation system be in
good working condition. Irrigation system leaks,
broken sprinklers, zones operating outside specified
pressure ranges, will have a negative effect on the
performance of the Flow-Clik.
Sensor
™
31