IV
-5
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
IV
: Operation
concentrate have been used. (See
figure 4-4)
BARGRAPH
The bargraph (refer to figure 4-1) consists of
17 LEDs. The LEDs on the bargraph will light
when the foam pump is running and
injecting foam concentrate. The amount of
LEDs lighted provides an indication of the
approximate pump capacity being used.
If water flow requirements exceed the
capacity of the pump to deliver foam
concentrate, the pump will run at maximum
rate. All bargraph LEDs light and the
uppermost LED flashes warning the operator
that the system capacity is being exceeded
and is running "lean" on foam concentrate
percentage.
If the flow decreases such that the required
injection rate is less than the lowest rating of
the pump, the pump will run at its minimum
rate and the first bargraph LED flashes so
the operator will know the system is running
"rich" on foam percentage.
RESET FUNCTIONS
The totalized values for water and foam
concentrate pumped can be cleared from
memory by performing a RESET function.
Using the
SELECT DISPLAY
button, select
either
TOTAL WATER
or
TOTAL FOAM
. By
pressing and holding both the
é
and
ê
buttons at the same time, the value shown
is cleared and displayed as zero.
Additionally the totalized values for water
and foam concentrate reset to zero
automatically when the apparatus power is
turned off.
FOAM CONCENTRATE INJECTION RATE
When
% FOAM
is selected, the
é
and
ê
buttons will respectively increase or
decrease foam concentrate percentage.
While operating in any function, with the
exception of
FLOW
during simulated flow
operation, whenever the
é
or
ê
buttons
are momentarily pressed, the display will
switch to the
% FOAM
display and show the
current injection rate for 2 seconds. In any
display mode, if either the
é
or
ê
button is
held down for a period of 2 seconds or
more, the injection rate value will increase
or decrease accordingly. Once released,
the display will return to the last selected
display after 2 seconds. When a reset
(pressing both the
é
and
ê
buttons at the
same time) is performed in the
% FOAM
display mode the foam concentrate
injection rate is returned to the default
value.
WARNING MESSAGES
Several safety features are incorporated
into the Hale foamMaster system to protect
the foam concentrate pump, electric motor
and apparatus wiring while maintaining
personnel safety. Messages appearing on
the display alert the operator to adverse
conditions that could cause damage to
Hale FoamMaster system components, the
apparatus and cause personnel injury.
FLUSH
If the Hale FoamMaster system is equipped
with ADT, MDT
ΙΙ
or MST and the operating
controls for these selectors are in the
FLUSH
position the foam pump motor will increase
to approximately 80% capacity. The system
will operate for 20 seconds when water is
flowing then go to standby mode.
Figure 4-4. Total Foam Display
