FSA100 Rev1206 INTRODUCTION Overview The AutoFoam is an around-the-pump foam proportioning metering system. It will automatically maintain a selected foam percent mixture regardless of water flow fluctuations. The AutoFoam is microprocessor controlled and is automatic in operation. The AutoFoam has easy to use controls and indicators. It becomes operational at the push of a single button.
FSA100 Rev1206 GENERAL DESCRIPTION Components The AutoFoam system consist of the following components (Refer to Figure 1): Control Module Metering Valve Assembly Eductor Discharge Flow Sensor(s) and Sensor Housing(s) Summing Device Cables Control Module The control module is panel mounted and has a front bezel measuring 4.25 by 4.25 inches.
FSA100 Rev1206 Controls and Indicators All controls and indicators are located on the front of the control module. It contains the push button electronic controls and digital displays. (Refer to Figure 2.) OFF Button Press this button to turn the AutoFoam system off. The metering valve will go to the closed position.
FSA100 Rev1206 INSTALLATION Note: Plumbing systems are always unique and may cause small deviations in the factory calibration. It is recommended that the calibration procedure be performed after installation. Install Control Module 1. Measure and mark mounting location for control module panel cutout and mounting screw holes.
FSA100 Rev1206 4.25" 1" 3.5" 4.5" 4.25" 3.75" 3.5" 10-32 Hardware Figure 3. Control Module Dimensions From Foam Tank Valve motor assembly Pump must be on top. Discharge Eductor Metering Valve Assembly Bypass and Flush Valves Pump Suction Interconnecting pipe diameters: FSA120 system 2.0"...
FSA100 Rev1206 Install Flow Sensor(s) There are several ways to install FRC paddlewheel type flow sensors. Mounting options include saddle clamps, weldments, pipe tees, and special adapters. Each mount will meet particular plumbing requirements. The maximum pressure for a flow sensor installation is 600 PSI.
FSA100 Rev1206 The preferred location for the mounting of a flow sensor is on the top half of the pipe. The best orientation is vertical. If the sensor is mounted on the bottom of the pipe, it may be susceptible to the accumulation of dirt.
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FSA100 Rev1206 Saddle Clamp Installation Note: Ensure that the mounting location meets the requirements for uniform water flow. (Refer to Flow Sensor Location.) Note: Ensure that there is enough room for the saddle clamp, sensor, and connector to fit. (Refer to Figure 6.) 1.
FSA100 Rev1206 Retainer Cap Pipe Size Dimensions (Sch 40) O-Ring Paddlewheel Flow Sensor Alignment Measurements are in inches. Sensor Housing Saddle Clamp Note: Allow a minimum of 2 inches clearence at the sensor top for removal/installation of the connector. Note: When the retainer cap is tightened make sure the sensor rim flat spot does not disengage from the alignment tab and...
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FSA100 Rev1206 Weldment Installation Note: Ensure that the mounting location meets the requirements for uniform water flow. (Refer to Flow Sensor Location.) Note: Ensure that there is enough room for the weldment, sensor, and connector to fit. (Refer to Figure 7.) 1.
FSA100 Rev1206 Retainer Cap Pipe Size Dimension (Sch 40) 1.95 to 1.80 O-Ring 1.95 to 1.80 1.90 to 1.75 Paddlewheel 1.88 to 1.73 Flow Sensor 1.88 to 1.73 1.85 to 1.70 Measurements are in inches. Tru-Seal Locknut Alignment Make sure that the alignment tab is centered on the pipe centerline.
FSA100 Rev1206 Install Summing Device The summing device mounts with two screws. Make sure there is room to connect the cables and adjust the potentiometers. Install Cables Cables need to be connected from the control module to power, to the metering valve, and to the summing device.
FSA100 Rev1206 THEORY OF OPERATION The operation of the AutoFoam system is controlled by a microprocessor housed in the control module. The programming enables the AutoFoam system to operate in three different modes. Automatic Mode This is the normal mode of operation. In this mode of operation the flow rate of foam concentrate is determined by the percent selected on the control module and inputs from the flow sensors.
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FSA100 Rev1206 Foam concentrate flow rate less than 9 GPM: At flow rates of 9 GPM or less there is no output from the flow sensors. This low flow rate is below the minimum that the flow sensors can detect and they will not provided flow rate data. This condition does not indicate a failure in the AutoFoam system and will exist if the proportioning percent and the water flow at the discharge sensor are low.
FSA100 Rev1206 OPERATION Static Operational Check This check should be performed after installation, maintenance, or repairs. It is a valuable tool if troubleshooting is necessary. It test the power and control module to metering valve wiring, and the manual operation of the metering valve. Note: Do not flow water or foam for this test.
FSA100 Rev1206 Pump Intake and Discharge Pressure Requirements WARNING: If the recommended minimum pump discharge pressures are not adhered to, the foam system may operate at partial capacity or fail to inject foam. Note: It is recommended that standard operating procedure be to gate the pump input pressure at less than 20 PSI and adjust the discharge pressure to more than 140 PSI when foam is used.
FSA100 Rev1206 Operational Check It is very expensive to use foam to test the system. As an alternative a die (e.g. red) can be used to color water in the foam tank. The color of the discharge allows the change in foam concentration to be observed. A lighter color indicates less foam in proportion to water while a darker color indicates more foam in proportion to water.
FSA100 Rev1206 AutoFoam system is off. Upper display shows OFF. FOAM Lower display is blank or if pump is running shows water flow at discharge sensor. M ANUAL FOAM FLOW FOAM 0PEN WATER FLOW CLOSE OVERRIDE TOTAL AutoFoam system is on. Upper display shows % selected (P on left side FOAM...
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FSA100 Rev1206 AutoFoam system is on. System is in Fixed FOAM Program mode. Upper display flashes showing –F– alternating with programmed foam M ANUAL FOAM FLOW flow rate. FOAM 0PEN Lower display shows discharge flow. Note: This condition WATER FLOW would exist if there is no CLOSE input from the foam...
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FSA100 Rev1206 AutoFoam system is on. System is in Manual mode FOAM both upper and lower displays are flashing. Upper display shows foam concentrate flow. M ANUAL FOAM FLOW Lower display shows FOAM 0PEN discharge flow. WATER FLOW CLOSE OVERRIDE TOTAL AutoFoam system is on.
FSA100 Rev1206 CALIBRATION The flow calibration potentiometers are located on the summing device. (Refer to Figure 10.) Note: Plumbing systems are always unique and may cause small deviations in the factory calibration. It is recommended that the calibration procedure be performed after installation. Calibrating Discharge Sensor(s) Note: For multiple discharge flow sensors calibrate each sensor separately.
FSA100 Rev1206 5. Time how long it takes for the foam tank to empty. Record the time (in seconds) and the displayed foam flow rate shown on the control module upper display. 6. Calculate the actual foam flow rate: Take the size of the foam tank (total gallon volume) divide it by the time it took to empty the tank.
FSA100 Rev1206 TROUBLESHOOTING TIPS Perform the Static Operational Check 1. If this check fails before step 8 the possible problems are: Power to the system Bad control module 2. If this check fails after step 8 the possible problems are: Wiring between the control module and the metering valve Bad control module Bad metering valve.
FSA100 Rev1206 MAINTENANCE Flushing the System It is recommended that the system should be flushed after each use to remove the foam from the flow sensors, metering valve, and plumbing. Make sure that the valve to the foam tank is closed when flushing the metering valve so that no water gets into the foam tank.
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