IV
-4
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
IV
: Operation
TANK B SELECTED
TANK A SELECTED
Figure 4-3. Foam Percentage Display
DISPLAY INFORMATION
The five digit display on the control unit
shows the value of the selected display
function or provides warnings to the
operator when the system is operating. A
function is selected by pressing the grey
SELECT DISPLAY
button in the upper right
hand corner of the control unit. Each time
the button is pressed a new function mode
is selected and displayed. LEDs above the
digital display denote which function is
being displayed. Pressing the
SELECT
DISPLAY
button changes the control unit
function but does not affect injection rate.
Control unit functions include:
FLOW
The display shows the current flow rate
of water or foam solution per minute in
Hale HPF flowsensor monitored
discharges. (See figure 4-2)
% FOAM
The display shows the foam concentrate
injection rate setting in the % FOAM
mode. For example, with a single tank
system or when the dual tank system
selector is in the
TANK A
position the
display will show "
A 0.5". When the dual
tank system selector is in the
TANK B
position the display will show "
b 1.0".
(See figure 4-3) When the system is
equipped with MST, MDT
ΙΙ
or ADT and
the selector is in the flush position the
display reads "
FLUSH".
TOTAL FLOW
The display shows the total amount of
water or foam solution pumped through
flowsensor monitored discharges. This
totalized value may be reset using
procedures outlined in the "Reset
Functions" paragraph.
TOTAL FOAM
The display shows the total amount of
foam concentrate pumped. The value
will be in the same unit of measure as
the water flow. This totalized value may
be reset using procedures outlined in the
"Reset Functions" paragraph. As an
example the display may show "
9.5"
indicating 9.5 gallons of foam
Figure 4-2. Stand-By/Flow Mode Display
