MAC/MTT-OPS-1
26 FEB 2019
SECTION 6
Employment
6-5
Adjusting Ring Opening - FULL WIDTH, FINE SPRAY
Right Rear Spray Head - ON
Right Center Spray Head - OFF
Left Center Spray Head - OFF
Left Rear Spray Head - ON
INTERMITTENT SPRAY
Intermittent spray is a time based function.
Individual controls knobs set the ON and OFF time
of the spray heads based on the desired length of
time needed to apply wet/dry strips on the road.
The standard MEGA spray system with
intermittent spray has a timer range of 5 to 100
seconds. The DiSCS spray system intermittent
spray has a timer range of 3 to 30 seconds.
Intermittent spray control is best suited for light
watering and pit ramps, where it is desired to have
definite wet and dry sections of road, and where
additional driver attention to road conditions is
required. This wet and dry strip watering provides
for better traction, allowing haul trucks and other
vehicles to drag water down the haul road while
also increasing water truck duration between tank
refills.
Due to the mechanical limitations of the spray
system, the timer control range refers to the
requests to open and close the spray head; delays
in closure may be experienced.
1. Ensure tank is full of water.
2. Adjust spray head openings to desired
settings.
3. Turn SYSTEM/POWER switch ON.
4. Set intermittent timer knobs to desired time of
spray pattern.
5. Turn INTERMITTENT switch ON.
6. Turn PUMP switch ON.
Do not engage/disengage the water pump
above LOW IDLE. Engaging/disengaging the
water pump above low idle will result in water
pump component damage and reduced
service life.
7. Select spray heads required for desired road
condition.
8. Operate water tanker on desired route and
observe spray pattern.
9. Adjust timing as desired to create the
necessary wet/dry strips.
While in intermittent mode, all discharge functions
can be turned OFF by turning off the
corresponding function switch. If the function is
turned ON while the timer is in the OFF cycle, the
function will stay OFF until the next ON cycle. The
illustrations below are examples of strip watering:
Typical Wide Span
Spray Head
Setting
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