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New Flyer SR542 - Page 99

New Flyer SR542
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VEHICLE OPERATION
84 Copyright © 1998 New Flyer Industries Ltd.
the pin on the manual actuator and striking the palm button down.
When actuated, the cylinder under the manual actuator valve
releases nitrogen gas into the actuation lines. These lines lead the
nitrogen to the extinguishing agent cylinder valve. The valve
opens allowing pressurized dry chemical to flow out lines leading
to the discharge nozzles in the engine compartment. Upon sys-
tem actuation the circuit monitor green “System OK” LED goes
out, a red “FIRE” LED illuminates, and an audible alarm sounds.
The audible alarm will continue to operate until the system is reset
or the alarm silence button (PUSH TO SILENCE) is pushed.
When pushed a “Silence Engaged” LED is illuminated. A red indi-
cator on the instrument panel labeled “FIRE” will also be illumi-
nated.
☞ NOTE:
The silence feature cannot be operated in advance of a fire or
fault.
Actuation of the Fire Suppression System will also cause the
engine protection system to shut down the engine ensuring that
the fuel flow stops. Bring the vehicle to a safe stop and ensure
that all passengers exit the vehicle safely.
During the discharge of the suppression system expect a high
noise level and possibly a large cloud of extinguishing chemical.
☞ NOTE:
Avoid breathing the dry chemical dust. It will irritate the throat and
lungs.
When the fire is extinguished and the heat detector contacts
reopen, the green “System OK” LED will again illuminate. Both
red and green LED`s remain illuminated until the system is ser-
viced.