Elkhart Brass Vulcan 8593-xx EXT - Manual (Page 9)

Page 9
The aerial Vulcan RF and Copperhead RF have special features to optimize performance as an
aerial master stream device when used on a straight aerial ladder with pinnable waterway. The
pinnable waterway feature allows the waterway to be pinned to the second fly section of the
ladder (egress position), thus keeping the monitor and nozzle away from the end fly section when
it is necessary to place the ladder tip at a window sill or roof parapet.
The aerial Vulcan contains a special wiring harness connection at the inlet flange to allow
attachment of an OEM provided proximity sensor. The proximity sensor is used to tell the
monitor controller which position the waterway and monitor is. As a result, the monitor
discharge Up-Down travel range differs for the two waterway and monitor positions as indicated
in Table 1.
Waterway/Monitor Position Up-Down Travel Range
Master Stream +30

to -135

Egress 0

to –135

Table 1
The 0

position is when the nozzle is aimed parallel to the ladder.
As a further enhancement, the left-right motor direction of rotation automatically reverses when
the monitor discharge is in the range of 0

to +30

. Without this feature, when the discharge
travels above 0
 , “left” would functionally become “right” and vice versa.
If the proximity sensor changes state while the monitor is in the “master stream” position and the
monitor discharge is in the 0

to 30

“up” range, the monitor controller will automatically lower
the discharge to 0

to prevent possible interference with the ladder, or impingement of stream
upon personnel.
Figure 7
8500-01 EXT Monitor