Manual

FoamLogix, Model 2.1A and 1.7AHP Class “A”
Electronic Foam Proportioning Systems
72
Note: Hale FoamLogix system electronic components
have no user serviceable components inside and are
replaced as a unit.
Opening of Hale FoamLogix electronic
components voids the manufacturer
warranty.
     
   

  
    
    
       
    
   

 
     
  
     
       
  
      
       
     
  
        
      
      
       
        
       

      
      
       
    
       
    
     
   
    
  
     
  
     

 
     
   
     
      
     
     
    
    
    
     
        
        
        
     
     
     
      


      
      
      
      
       
      
       
Water
Flow Data
Closed
Loop
System
FoamLogix Control
Display Unit
Foam Flow Data,
A or B Tank
Low Tank Data
Variable Speed
Instructions to
Motor
Water Flo
w
Sensor
Pump/Motor Base
Foam Flow
Data
Foam Flow
Sensor
Distribution
Box
Figure 43: FoamLogix 2.1A & 1.7AHP System Closed-Loop
Flow Diagram
System Overview
See Figure 43: “FoamLogix 2.1A and 1.7AHP
System Closed-Loop Flow Diagram.”
The FoamLogix 2.1A and 1.7AHP are “closed-
loop” systems. The brains behind the system is the
computer-controlled FoamLogix Control Display
Unit. As an electronic system, the ow of data
—”runs“ the system. A basic understanding of how
the system functions makes troubleshooting easier.
Water ow data is fed to the control unit computer.
Since the injection rate (%) is preset, the control
unit calculates the required motor speed of the foam
pump and sends this data to the motor. The output
of the pump is measured by a foam ow feedback
sensor.
The foam ow feedback sensor tells the control
unit how much foam is actually pumped so the
display can make the required motor speed
adjustments. This closed-loop runs several times
per second and is what makes the system so
accurate.
Note: The FoamLogix unit has a “simulated
ow“ function, described in Section 4:
“Operation” heading “Simulated Flow
Operation“ beginning on page 66. This allows
troubleshooting without owing water, yet
simulates an actual water ow.
Distribution Box
The Distribution Box, part of the pump/motor
assembly, sends data on LOW tank warnings tank
selec tion status, as well as foam concen trate ow
feedback to the display.
LOW tank and Tank selection status are also
determined within the distribution box. A connector
at taches to selector valves. This connection signals
the control unit if the unit is in tank selected or ush
mode.
If no accessory is used, a connector plug is installed
to lock the system in the Tank A mode. (See Figure
20: “Control Harness Connections” on page 45.)
Removing this plug or disconnecting the MST
accessory cable places the system in the “ush“
mode.
Pump/Motor
The discharge of the foam pump directs foam to
the rotary lobe ow meter.
The rotors are a composite material con taining small
stainless steel targets. As the foam is being pumped,
a target lines up with the sensor in the pump head.