Mega MAC - Troubleshooting; Speed Based Programming

MAC/MTT-OPS-1
26 FEB 2019
SECTION 6
Employment
6-6
TROUBLESHOOTING
If the following conditions occur, adjust as follows
and re-test spray patterns until the optimal pattern
is achieved.
1. Adjust spray head width toward center of truck
by loosening the 4 retaining bolts on the
bottom of the spray heads and rotating the
spray head on the base plate to the desired
position.
2. Re-tighten spray head retaining bolts.
1. Increase engine rpm by shifting to a lower
gear.
2. Increase the number of spray heads activated.
3. Reduce vehicle speed.
4. Increase the spray intensity by rotating the
adjusting ring to the “heavy spray” setting (3/
4” slot height).
1. Decrease engine rpm by selecting a higher
gear.
2. Increase vehicle travel speed.
3. Reduce the number of spray heads activated.
4. Reduce the spray intensity by rotating the
adjusting ring to the “fine spray” setting (1/4”
slot height).
SPEED BASED PROGRAMMING
The resident software provides a consistent layer
of water on haul roads regardless of ground speed.
The software reduces water usage and prevents
puddling at stops and haul ramps. Nominal
settings produce about 3 liters per cubic meter
regardless of ground speed. This maximizes water
usage and extends the duration of a given load of
water. Adjustments are provided to increase or
decrease the layer of water dispersed, as well as
setting maximum water flow at a desired ground
speed. Below is an example of a system setup and
what behaviors will be observed from the system:
Example 1 (Medium Speed & High Winds)
Setup:
1. C
OVERAGE - Set at midpoint (50%)
2. S
PEED - 24 KPH/15 MPH)
3. S
PEED BASED – ON
4. S
PRAY HEADS - Select all 4 spray heads
Observed Operation:
– Vehicle speed → 24 KPH/15 MPH and greater
all spray heads ON.
– Vehicle speed → 16 KPH/10 MPH – 2 inner
spray heads turn OFF
– Vehicle speed → 13 KPH/8 MPH – 2 outer
spray heads begin to pulse (10 second
cycles) to maintain approximately 50% water
coverage (50% spray head ON/50% Spray
head OFF during the cycle).
– Vehicle speed → 5 KPH/3 MPH or less – All
spray heads turn OFF.
Discharge spray extends to and beyond berms
or into oncoming traffic.
Insufficient water on roadway
Excess water on roadway