MEGA Corp. MTT-OPS-1 - Manual (Page 18)

MTT-OPS-1
13 Nov 2013
SECTION 2
System Description
2-9
Suction Load - Allows continuous hydraulic water
pump drive circuit flow during a low water level
condition. Also disables use of any other master
switch box waterway valve
AUX FUNCTIONS
AUX 1 – Sends request for operation of auxiliary
functions or additional non-standard options of spray
system. This function is unique to a specific tank
serial number.
AUX 2 (Suction Load Station) – If equipped, sends a
request to the hydraulic water pump drive circuit to
allow suction load pump drive motor operation
during a low water level condition while also
disabling the timed-out function. When turned ON,
the AUX2 switch LED will flash rapidly and all
pressure discharge functions are disabled.
HOSE – Allows continuous water pump operation for
hose reel use while also disabling the use of any
other master switch box waterway valves.
Ensure all discharge function switches are OFF when
using HOSE function. Activating the HOSE switch
requests all discharge function to turn OFF (All Spray
heads, Water Cannon BFV, Drain, Dump Bar and
FOAM).
Non-Pressure Discharge Function Descriptions:
Dump Bar (Gravity) – Controls opening and closing
of the BFV when selected, or automatically controlled
when the INTMNT function is selected.
JOYSTICK BOX EXTENDED FUNCTION
DESCRIPTIONS
The joystick box houses logic controls for the joystick
and the FOAM, NOZZLE, and BFV switches. These
switches and the joystick control requests for water
cannon operation.
FOAM – Sends request for FOAM agent valve to open
or close.
NOZZLE – Sends request for adjustable nozzle on
water cannon to move from FAN/FOG to STREAM
spray patterns.
BFV – Sends request to open or close butterfly valve.
The butterfly valve controls water flow to the Water
Cannon. Activating the BFV switch requests the water
PUMP to stay ON with NO other pressure discharge
functions activated providing, sufficient water is in
tank to allow command to be sent.
JOYSTICK – Sends requests for rotation and
elevation motion for water cannon operation.
GROUND SPEED SENSING (GPS) CONTROL
The MEGA ground speed sensing control system is an
independent and self-contained GPS unit and
antenna that provides speed information to the
existing Mega Digitally Integrated Spray Control
System (DiSCS). The DiSCS’s logic control uses the
ground speed signal to automatically cycle and pulse
spray heads to obtain a desired lay-down of water
regardless of ground speed. The system contains
controls to adjust maximum water discharge speed
as well as actual rate of flow. This automatic control
reduces water usage and prevents over-watering of
haul roads and intersections.
The system will automatically close all discharge
functions (spray heads) below 5 KPH/3 MPH to
prevent puddling of water at intersections. The
system also opens selected discharge functions
when accelerating above 5KPH/3 MPH.
Joystick Box Functions