Hale 5.0 FoamLogix - Manual (Page 9)

Ι
-3
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
I
: Description
SYSTEM DESCRIPTION
operating. The control unit display also
warns the operator when errors or
abnormal operations occur in the system.
Foam concentrate injection rate is
controlled by a computer chip in the
control unit for accurate, repeatable,
reliable foam concentrate injection. A
water flowsensor constantly monitors water
flow through the discharge piping. The
information from the flowsensor is provided
to the control unit by a shielded cable.
When the Hale Foam system is activated at
the control unit a signal is sent from the
control unit through the shielded control
cable to the distribution box to begin foam
concentrate injection. The distribution box
then provides power to the electric motor.
As the motor rotates the pump, foam
concentrate flows through the foam pump
discharge to the one piece check valve/
injector fitting into the water discharge
stream.
A feedback sensor in the foam pump body
measures foam concentrate flow. The
water flow rate and foam concentrate flow
rate are constantly compared by the
computer chip in the control unit. The
motor speed is constantly adjusted to
maintain the operator selected foam
concentrate injection rate. Since the
system is flow based, injection rate remains
constant regardless of changes in system
pressure or the number of discharges open.
There are two models of Hale Foam systems
covered by this manual. The Hale
FoamLogix Model 3.3 and Model 5.0. The
maximum rated foam concentrate flow in
gallons per minute is denoted by the model
number. Table 1 shows system capacities
at various foam concentrate injection rates
for the different Hale Foam Models.
Hale Foam systems can be configured to
operate with single or dual foam
Hale Foam proportioning systems are
completely engineered, factory matched
foam proportioning systems that provide
reliable, consistent foam concentrate
injection for Class A and Class B foam
operations. Hale FoamLogix Foam systems
accurately deliver from 0.1% to 10.0% foam
concentrate through a check valve/
injector fitting directly into the water
discharge stream. It is then fed as foam
solution into a standard fog nozzle, an air
aspirated nozzle, or CAFS equipment,
through the apparatus discharge piping. A
properly configured and installed foam
system with Hale recommended
components virtually eliminates
contamination of the booster tank, fire
pump and relief valve with foam
concentrate.
The heart of the Hale Foam system is an
electric motor driven rotary gear pump.
The pump is constructed of bronze and
stainless steel and is compatible with almost
all foam concentrates. The pump is close
coupled to the electric motor thereby
eliminating maintenance of an oil filled
gearbox. An internal relief valve,
constructed of stainless steel, protects the
foam pump and foam concentrate
discharge hoses from overpressurization
and damage.
The control unit, mounted on the operator
panel, is the single control point for the Hale
Foam system. Depressing the ON button
starts foam concentrate injection. A super
bright digital LED display shows the water
flow rate, total water flowed, foam
concentrate injection percentage and
total foam concentrate used depending on
the display mode selected. A bargraph on
the control unit provides indication of the
approximate system capacity being used.
Adjustment of foam concentrate injection
rate can be accomplished by pushing the
appropriate button while the system is