SENTINEL II 5700
3
Bank of foggers controlled by turning supply
pump on and off, under timer control.
Pressurized liquid source, such as the house water
supply, feeding a zone of foggers. Solenoid valve
is controlled by repeat cycle timer.
Fog heads controlled individually by solenoid
valves in supply lines. Chemicals can be injected
“in-line” with a proportioning injector. Valves
controlled by multiple timers.
INSTALLATION PLANNING
A Sentinel II installation can contain any number of fog heads, all supplied
with liquid from a central source. This can be located wherever convenient.
If fogging chemicals must be diluted, you can use a mixing reservoir or inject
them in-line with a proportional mixer. Low pressure tubing or other low cost
material is used to connect heads to the liquid source.
Heads can be operated individually or connected together in zones. Nozzles
can be rotated to any discharge angle. A metering valve on each head (open
counterclockwise for more flow, larger droplets) is used to set fog proper-
ties.
Power requirements, piping sizes and valving are determined by the head
layout and expected liquid flows. Each head draws 10A at 120VAC (5A at
240V). A head’s effective range (in still air) is 75-100 ft for small droplets, and
30-60 ft for larger ones. Liquid output is 4-10 oz/min for small droplets, and
10-20 oz/min for large.
System Control
When the inlet pressure at the fog head exceeds 3 psi, the pressure switch
turns on the head and generates fog. To control an individual head, feed it
separately. To control several heads at once, connect them to a common
liquid line.
Many installations use repeat cycle timers to activate solenoid valves or low
pressure transfer pumps (see examples below).
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