25
Installation and Operation Manual
AccuMax SP
MultiFlo Flowmeter Interface Modules
Refer to the MultiFlo Interface instructions for
installations requiring multiple FoamPro Flowmeters.
Figure 9-4 shows the connection of the flowmeters and
MultiFlo Interface with the Digital Display Control
Module.
Figure 9-4
MultiFlo and Flowmeter Connections
Foam Tank Low-Level Sensor
The foam level sensor must be mounted in the foam to
monitor low foam concentrate level. Figure 9-5 shows
the optimal mounting positions for the foam tank low
level sensors. The standard top or bottom mount switch
has 1/8" NPT threads. Mount the sensor in the bottom
of the foam tank in an upright position. Use suitable
sealant to prevent concentrate leakage.
Figure 9-5
Foam Tank Low-Level Sensor Mounting Options
NOTE: There must be space under the tank for the
cable to be routed to the hydraulic valve driver box.
Do not remove the float from the shaft on the sensor
assembly. If it is installed in the reverse position
LO
CON
and
NO CON
will appear on the Digital Display
Control Module and the system will automatically shut
down, even if there is foam in the tank.
When the bottom of the tank is not accessible, the foam
tank low-level sensor can be hung from a long pipe
nipple attached to the top of the tank. Ensure the pipe
nipple is rigid enough to withstand the force of the
sloshing foam when the vehicle is in motion.
Make sure the low-level sensor does not contact the
side of the foam tank when the vehicle is in motion.
Because the wire connections must be made inside the
pipe nipple, a 3/8" NPT pipe nipple with a 3/8" by 1/8"
NPT reducer at the lower end is the minimum size
recommended. When the foam tank low-level sensor is
suspended for the top of the tank the float must be
reversed for proper operation.
CAUTION: The foam tank low-level sensor must be
utilized to protect the foam pump from dry running.
Failure to do so will void the warranty.
CAUTION: Do not mount the low-level sensor near
the inlet or discharge of the tank, especially when
used with high viscosity foams. The resulting foam
flow may cause false readings on the sensor.
Using a powered test light, check the foam tank low-
level sensor operation after installation. With no foam in
the tank, the light should be on. If this is not the case,
remove the clip from the end of the sensor; then remove
the float and reinstall it 180° out of position. Reinstall the
clip.
Connect the sensor wires to the low tank sensor cable.
The low-tank switch sensor cable may be shortened. It
has pigtails at both ends and is not polarity sensitive.
Connect the other cable end (blue-coded cable end) to
the hydraulic valve driver box on the hydraulic valve
assembly as shown in Figure 9-2.
Figure 9-6 Side-Mount Foam Tank Low-Level
Sensor Installation
NOTE: Distance from bottom of foam
tank to center of switch should allow
sufficient foam concentrate volume for
two minutes of pump run time.
Top Mount
Low-Tank
Sensor
Bottom Mount
(Optional)
Side Mount
Tank Sensor
(Optional)
Float
(Positioned on
top of Switch)
Bottom of Foam
Concentrate Tank
Low-Tank
Level Sensor
1/2-inch NPT Threads
Cables
(2 to 4 Paddlewheel Flowmeters)
MultiFlo
Control
Module
Digital Display
Control Module
Short
Flowsensor
Cable
(provided with
MultiFlo System)
