Elkhart Brass ELKHART 299-11 EL (25,30,40FT) - Manual (Page 2)

Page 2 of 3 98464000 REV-D
(9) Join upper and lower sections of Horizontal Drive Sleeve (Item 17 & 23) by making
continuous 1/8” bevel weld at top end of lap joint sleeve.
(10) Attach Vertical Control Cables (Item 15) to monitor vertical control handle as shown on
drawing. Adjust cable lengths so that handle is parallel to stream direction.
(11) Attach nozzle to monitor discharge port. If adjustable fog nozzle is used, attach pattern
control cable to nozzle.
(12) When raising the monitor assembly, do not attach cable sling to bent tube waterway at
top of assembly. This portion of the assembly is not designed to support the weight of the
long riser and damage or failure could result.
Installation:
The supply pipe and companion flange configuration to which the 299-11 EL monitor is installed
must be supported to withstand a bending moment of 23,000 ft-lbs applied to the flange face. A
forged steel companion flange and steel pipe with adequate support are recommended. DO NOT
use cast iron companion flange or cast iron pipe. Join monitor base flange to companion flange
using ¾-10 SAE Grade 5 bolts and nuts. Use a 1/16" thick ring gasket designed for use with
steel flanges. Torque flange bolts to 260 ft-lbs (Dry).
****IMPORTANT****
DO NOT exceed the following maximum allowable flow rates at 100 PSI nozzle pressure:
Monitor
Heights
Max. Flow at
100 PSI NP
Maximum Pressure
At Base Flange
Calculated Deflection of
Nozzle at Maximum Flow
25 Ft. 750 GPM 136 PSI 11.84 inches
30 Ft. 750 GPM 139 PSI 12.54 inches
40 Ft. 500 GPM 130 PSI 13.30 inches
Pressure and flow characteristics of water supply must be determined prior to monitor installation,
and a restricting device, such as an orifice plate, installed between flanges to limit flow and pressure
to appropriate values as indicated above.
Operation:
Horizontal and Vertical locks: The monitor should always be locked in position when it is to
be left unmanned. The horizontal travel is locked and unlocked using a friction lock operated by
hand wheel assembly (Item 14). Turn the hand wheel assembly clockwise to lock the monitors
horizontal travel and counterclockwise to unlock it. The vertical travel can be locked in position
using the friction lock on the right hand side of the control arm. To lock the monitors vertical
travel turn the lock clockwise using the handle shaft with the knob on the end (Items 1 & 2).
Turn the lock counterclockwise to unlock the vertical travel of the monitor. Always make sure
both locks are engaged before flowing water.