Description
Monitor mounted on Water Powered Oscillating Unit, transforms the manual monitor into an oscillating monitor. The unit is suitable for use in high risk areas such as tank farm facilities, aircraft hangars, offshore, refineries, chemical plants, and heliports. The monitor possesses several design features that provides ease of operation, minimum maintenance and resistance to corrosive environments. The monitor is used with Nozzle as premix solution with flow upto 1000 GPM. The monitor can be used with water-foam self-inducting nozzle having flow up to 750 GPM. The monitor has cast bronze 3 inch (75 MM) water way. Vertical & horizontal rotation is through corrosion resistant bronze swiveling joint with double row of stainless steel ball bearing. Both vertical & horizontal movement is controlled by handle with twist lock. A water drive wheel is connected to a double reduction
gearbox drive and oscillating mechanism. To operate the drive wheel, a small quantity of flow is diverted from the monitor inlet.
The monitor requires no external wiring or hydraulic control for operation. The minimum operating water pressure of the oscillation mechanism is 3.5 kg./sq.cm. The flow of water through oscillation mechanism is 42 LPM at 3.5 kg./sq.cm. and 60 LPM at 7 kg./sq.cm. of water pressure.
The design ensures to prevent jet reaction forces from affecting the horizontal and vertical position of the monitor during operation.
The vertical angle of elevation and horizontal arc of oscillation is field adjustable and can be set and locked in position. The monitor can be set to oscillate over a range of 0°-120° and the oscillation arc can be set anywhere within the 360° field of operation.
LISTED
DECEMBER, 2019-1 PAGE 2 OF 6 HD 214
HD FIRE PROTECT
PVT. LTD.
The unit is equipped with a garden hose test connection. This allows functional check of the oscillating mechanism without system flow.
Note: 1. Pressure Gauge is optional supply and is for indicative purpose only; should not be considered for friction loss movement.
2. The vertical lock needs quarter turn for locking and unlocking, excessive movement may again lock for lock position or unlock to unlock position.
INSTALLATION, TESTING &
MAINTENANCE
The monitor must be installed and operated carefully by a trained person, having good knowledge of equipment. Before assembly of the monitor to supply piping, thoroughly flush the piping with water to avoid sand, residue, welding slag or other debris hindering the proper functioning of the monitor. The vertical angle of elevation and horizontal arc of oscillation is field adjustable and can be set & locked in position. Monitor can be set at oscillation over a range of 0° – 120° and oscillation arc can be set anywhere with 360° field of operation. The elevation angle of monitor is between +80° to −40° from horizontal.
After few initial successful tests, an authorized person must be trained to perform the inspection and testing of the monitor. The monitor should be ready for use to achieve this condition, scheduled inspection and maintenance operation should be performed and it must be recorded in the maintenance register book indicating the requirement or recommendation. The recommended maintenance, procedure must be followed as given in
the manual and also as per the local authority having jurisdiction. It is recommended to carry out physical inspection of the monitor on weekly basis. The inspection should verify that no damage has taken place to any component and the monitor is ready for use. Carry out functional test every three months for the flow, regular rotation in horizontal and vertical plane for the entire operating range to observe any leakage. Periodic proper greasing through grease nipple provided on bearing, must be ensured. Use water resistant low friction synthetic grease. Lubrication is required for smooth operation. Each monitor must be operated with full flow once in a year in accordance to the guidelines of the organisation having local jurisdiction.
The owner is responsible for maintaining the equipment in proper operating condition. Each monitor is supplied with Instruction Manual for installation, operation and maintenance. CAUTION Trained personnel for firefighting must use the monitor. Appropriate guidance & training must be given to reduce the risk or injury. The nozzle must be fixed to the monitor carefully; the flange bolts must be tightened uniformly. The piping must be able to withstand the horizontal reaction force. Serious injury to personnel and equipment can result from improper installation. When installing monitor it is critical that flange bolts be tightened uniformly to prevent cocking of the monitor relative to the flange or valve. Before flowing water from monitor, check that
all personnel are out of stream path and stream direction will not cause avoidable property damage. Application of water or foam on an electric appliance can cause serious injury. The water supply to monitor must be increased/ decreased gradually to prevent possible water hammer occurrence.
WARNING
THE OSCILLATING UNIT CONTAINS MOVING PARTS.
KEEP HANDS, FINGERS AND OBJECTS AWAY FROM THE
MOVING PARTS AND NEVER OPERATE WITHOUT COVER
FITTED ON THE UNIT.
DO NOT TRY TO STOP THE MONITOR OSCILLATION,
AS THE MONITOR CAN CAUSE INJURY TO PERSON AND
THE GEAR MAY SLIP AND OSCILLATION MAY STOP.
THIS MONITOR SHOULD NOT BE USED FOR ANY OTHER
PURPOSE, OTHER THAN FOR FIRE-FIGHTING.
ADJUST THE ARC OF OSCILLATION
1. To adjust the arc of oscillation, shut off the water supply and open the top cover plate.
2. Close the speed control valve.
3. Arc of oscillation can be set at 25°, 45°, 60°, 80°, 100° or 120° by unscrewing the bolt on link and fixing at desired angle as marked. (Fig.4)
4. Refix the top cover plate, after opening the speed control valve. TROUBLE SHOOTING
If the Oscillating unit fails to oscillate, then check the following:
• Check the speed control valve is open.
• Make sure the operating pressure is minimum 3.5 Bar (50 PSI).
• Check and make sure the pelton wheel water exhaust is freely flowing without any obstruction.
DECEMBER, 2019-1 PAGE 3 OF 6 HD 214
HD FIRE PROTECT
PVT. LTD.
Nozzle Model
Monitor
Elevation
Angle
Monitor Inlet Pressure & Reach Data
100 PSI 120 PSI
Flow GPM
Reach in Meters Flow
GPM
Reach in Meters
Fixed Oscillating Fixed Oscillating
VARSHA
40U-500
5 500 10 8.5 547 11 9.5
15 500 24 19 547 22 18
30 500 60 50 547 61 50
VARSHA
40U-750
5 750 11 9 821 12 10
15 750 24.5 20.5 821 25 21
30 750 61.5 51 821 62 52
VARSHA
40U-1000
5 1000 12 10 1095 13.5 11.3
15 1000 26 22 1095 28 23.5
30 1000 65 56 1095 66 55
VARSHA
HF40U-500
5 500 7 5.5 547 7.5 6.5
15 500 18 14 547 19 15
30 500 46 38 547 47 39
VARSHA
HF40U-750
5 750 9.5 7.8 821 10 8
15 750 21 17 821 22.5 19
30 750 54 46 821 55 45
NOTE :
• VARSHA 40U is non-aspirating, non-inducting Nozzle, it needs premix foam concentrate.
• VARSHA HF40U is non-aspirating, self-inducting Nozzle.
• Above readings are considered in no wind conditions. Wind or other environmental factors can affect the
readings.
• Some ranges are based on extrapolation of existing data and observaions.
WATER-POWERED OSCILLATING MONITOR RANGE DATA – MONITOR MODEL VAJRA-331
• Make sure all links are free from debris and bolts
are loose and are in place.
• If the unit is not operated from long time, then
clean and operate at 7 Bar for few minutes, to
make sure the line link is free to move.
• The oscillating unit may wear and tear, hence
the unit needs to be opened and inspected
after approximately two hours of oscillation. If
considerable wear and tear is observed then the
parts of oscillation unit need to be replaced, to
keep the monitor in healthy condition.
