7
III. S
YSTEM
C
OMPONENT
D
ESCRIPTIONS
8294-07 Scorpion RF Monitors
(Figure 4) The 8294-06 Scorpion is a cast aluminum monitor
with 4" waterway. The waterway contains a central vane to
minimize large-scale turbulence and provide superior fire
streams. Monitor water supply connection is a 4 inch 150 lb.
ANSI pattern flange. The discharge nozzle connection is 3-
1/2 inch National Hose thread. Nozzle stream direction is
controlled by two permanent magnet type planetary gear
motors, one controlling rotation about the axis of the water
inlet, and the other controlling nozzle elevation and
depression. Right angle gear cases between the gear motor
and the monitor allow for convenient manual override of the
electric motors in the event of a power failure during
firefighting operations. All gearing is enclosed within the
monitor housings.
The maximum monitor flow capacity is 2000 gallons per
minute. Monitors can be supplied with the SM-1250E
constant pressure (automatic) type master stream
nozzle. This nozzle has a flow range of 300 to 1250 gallons
per minute at 75 psi and has an electric drive mechanism for
RF control of the spray pattern from a straight stream to wide
fog. A similar nozzle, the SM-2000E, provides a flow range
of 500 to 2000 gallons per minute at 80 psi. For optimum
straight stream performance, stream shapers are provided as
part of the monitor and nozzle system. Solid stream nozzles
are also available for use with these monitors.
Figure 4
8294-06 Monitor with 284-A and SM-
2000E
A.
RF Receiver/Control Module
The monitor control circuit uses a state-of-the-art PIC (Programmable Integrated Circuit) chip design.
This device allows numerous control features while keeping circuit board size to a minimum. Relays
within this box provide motor reversing control for the Up/Down, Left/Right and Straight Stream/Fog
functions.
All functions are sent to the RF Receiver/Control Module via an encoded radio frequency link. The
radio link reduces the number of control wires down to just the two power leads, dramatically
simplifying the installation procedure. The link also allows wireless control up to ¼ mile away using a
battery powered handheld transmitter.
