Hunter SVC-100, Manual, Page: 21 / 40

18
®
19
Wireless Valve System
Guaranteed One or More Full Seasons of
Operation Without Battery Replacement...
9-volt battery powered
Whereas some battery-powered controllers
require up to 3 different batteries, the Hunter
WVC uses only one 9-volt battery which will
easily power it for at least one full irrigation
season. Even if your irrigation schedule
requires the Hunter WVC controller to provide
power to each valve to irrigate 9 times each
day, the battery in the Hunter WVC controller
will power the valve for a full season.
Latching Solenoid Design for Minimal
Battery Power Consumption...
No need to check the battery more than
once a year
Using a latching solenoid design, the Hunter
battery controllers consume very little power,
allowing the controller to operate valves for
more than 12 months.
What is a latching
solenoid? Latching
solenoids are activated
in the same manner as a
traditional non-latching
solenoid. The controller
sends a positive pulse
to the DC latching
solenoid, causing the
solenoid plunger to “pull up” which drains
the upper chamber of the valve. This causes
the diaphragm to lift off the valve seat, which
allows the valve to open (turn on). This is
where the similarities end. In standard non-
latching solenoids, in which the traditional
controller must provide a constant power
supply to the solenoid coil to hold the plunger
up, the direct current (DC) latching solenoid
plunger is held in place by the magnetic field
generated by the magnet around the bottom
of the solenoid cavity. When the irrigation
program is finished, the battery-powered
controller sends a very short negative pulse to
the DC latching solenoid, causing the plunger
to drop. This allows the upper chamber to
fill with water, causing the diaphragm to seal
against the seat and close the valve. Short
pulses consume very little battery power,
allowing a battery-powered controller to work
for many, many cycles.
The Hunter latching solenoid is packaged as
a separate part number, which is p/n 458200.
For easy identification, its black and red wires
distinguish the Hunter latching solenoid from
Hunterʼs standard solenoid, which has two red
wire leads.
Non-Volatile Memory...
Maintains irrigation programs indefinitely
The Hunter battery-powered controllers have
what many of the sophisticated electronic
controllers have – a non-volatile memory. With
the controllerʼs non-volatile memory, the set
irrigation program is maintained indefinitely,
providing a useful feature when the controller
battery becomes weak or when the battery
needs to be replaced. The replaceable 9-volt
alkaline battery keeps the time of day and
operates the DC latching solenoids. The
controller program is maintained through the
controllersʼ non-volatile memory.
Controller is Waterproof up to 12 Feet
of Submersion...
Moisture intrusion is non-existent
In-ground valve boxes, which can create
extremely humid environments for all
enclosed components, are not a problem for
the WVC battery-powered controller. Installers
and users can rest assured that moisture
intrusion will not occur in the Hunter WVC
controller as the sealed case is completely
waterproof and provides protection from
humidity as well as submersion in water up to
twelve feet deep.