1-19. FIREFIGHTING SYSTEM. - Continued
g. Hose Reel and Automatic Tank Fill Control.
(1) The hose reel is provided with an electric motor drive to rewind the fire hose after use. The motor is
energized via a motor relay actuated from a push button switch located externally on the rear body panel, (see fig. 1-41)
A drain valve in the hose reel supply line enables draining of residual water after firefighting Removal of residual water
from the fire hose prior to rewinding is accomplished using the air blow-out valve.
(2) The rear tank fill port is-equipped with an air-operated automatic tank fill valve. Air pressure to keep this
valve closed is provided via a normally-open solenoid-controlled air valve. The solenoid is connected to the water level
monitor 3/4 full indicator. It is energized when the switch is set to ON and the water level is below 3/4 full. When
energized, air pressure to the automatic tank fill valve is shut off and the valve is open. The tank fill valve is closed
whenever the switch is set to OFF or the tank level is at or above 3/4 full provided that air pressure is available.
Figure 1-41. Hose Reel and Automatic Tank Fill Control