Elkhart Brass Extender 8598 - Manual (Page 6)

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III. System Component Descriptions
A. 8598 Extender
The Extender is an electric operated telescoping waterway. It is designed to elevate a
deck monitor 18 inches so the stream path can clear obstructions like truck cab, lights,
hose bed, etc. It is designed to be used in full up position, but can be used in the full
down position. The water supply connection is 3 inch Victaulic (optional 3 inch NPT
male thread). The discharge connection is 3 inch 150 lb. ANSI pattern flange (optional 3
inch NPT male threads).
The maximum flow capacity is 1250 gallons per minute. The maximum inlet pressure is
200 psi. A pressure switch prevents the Extender from moving when internal pressure
exceeds 10 psi to prevent damage to equipment or injury to personnel caused by
unexpected changes in stream elevation.
B. Controller
The Extender’s control circuit uses a state-of-the-art control logic to keep the controller
size to a minimum. The controller utilizes modern switch styles to control the deck gun
elevator. A momentary push elevates or lowers the unit. The unit does not stop in mid
position. An optional in-cab warning lamp (supplied by the OEM) shows if the Extender
is not fully retracted.
IV. Control System Specifications
Truck Voltage
Minimum 11 VDC to Maximum 15 VDC
Recommended Ratings
Operating voltage - 13.8 VDC
Primary fuse rating - 10A
Position warning output fuse rating - 125mA
Extender
Maximum flow capacity is 1250 gpm
Maximum inlet pressure rating is 200 psi
Maximum moment is 9,480 in/lbs at the outlet connection
Moment = RFxH
Where RF = Reaction Force (Pounds)
H=Height of vertical discharge pivot (Inches) (See Figure 3)