MEGA Corp. MSC-OPS-1 - Manual (Page 14)

MSC/MST-OPS-1
31 Dec 2013
SECTION 2
System Description
2-5
CAB CONTROLS (DIGITAL)
MSC/MST units with fully hydraulic systems MUST be
configured with the Mega Digital Spray Control
System (DiSCS).
ELECTRO-HYDRAULIC SYSTEM (CAT 621H/K only)
This system is designated as a Digital Spray Control
System (DiSCS). The system is comprised of control
boxes, logic controllers, sensors, and cabling. It is a
multi-function control system with a separate
joystick box that is mounted in the vehicle cab. These
two boxes control all water tank functions. The
master switch box operates the water pump, spray
heads, intermittent spray, work lights, hose reel,
dump bar, suction loading, and tank drain valve. The
master switch box also provides indications of tanker
water level and water pump protection features. The
remote mounted joystick box operates the water
cannon, adjustable nozzle and foam suppression. The
cab controls require 12/24 VDC vehicle power to
operate.
ABBREVIATIONS AND DEFINITIONS
AUX1 – Auxiliary or additional optional function
BFV – Butterfly Valve
DMPBAR – Dump bar for heavy spray of water close
to ground. Can be either a gravity or pressure
dump bar (pressure dump bar requires water
pump activation to operate).
DRAIN – Drain (gravity or pressure) for evacuation of
water from tank, mounted typically at the rear
of the tank.
KPH – Kilometers per hour
LT VSS – Left Vertical Side Spray
LTC – Left Center Spray Head
LTR – Left Rear Outer Spray Head
MPH – Mile per hour
RAMP – Ramping Control feature. Rate of increase or
decrease in speed of water flow during PUMP
engagement or disengagement
RT VSS – Right Vertical Side Spray
RTC – Right Center Spray Head
RTR – Right Rear Outer Spray Head
The master switch box control functions operate as
follows:
Master
Switch Box
Joystick Box
Control Function
POWER Provides power for all cab control
functions.
PUMP Routes vehicle hydraulic system
pressure and flow to the water pump
hydraulic drive motor.
INTMNT Intermittent setting.
Activates or deactivates system
timer function.
LIGHTS Provides power to work lights.
t ON
(Intermittent
timer—manual
mode) Sets ON time of selected spray heads
when the timer switch is in the inter-
mittent (INTMNT) position.
Scale: adjustable from 5 seconds to
30 seconds.
RATE
(GPS Auto Mode) Increases or decreases amount of
water dispersed during a cycle when
AUTO switch is on (see extended
description).
t OFF
(Intermittent
timer—manual
mode) Sets OFF time between timer cycles
of selected spray heads when the
timer switch is in the intermittent
(INTMNT) position.
Scale: adjustable from 5 seconds to
30 seconds.
SPEED
(GPS Auto Mode) Sets desired ground speed for maxi-
mum flow (OPEN continuously) of
selected spray heads (see extended
description).
WATER LEVEL Indicates tank water level.
AUTO Controls activation of GPS Auto
mode.
AUX 1 Reserved for user-added option.
AUX 2 Reserved for specialized function.