10
Installation Manual
MST
MANUAL SINGLE TANK FLUSH SELECTOR
3. After installation, check operation of
the side mount low tank level sensor with
a powered test light. With no foam in
the tank, the light should be on. If light
does not illuminate, rotate the side
mount low tank level sensor until the test
light is on.
BOTTOM MOUNT LOW LEVEL SENSOR
INSTALLATION
1. The bottom mount foam tank low
level sensor must be mounted into the
bottom of the foam tank. The sensor, as
supplied, is threaded into a bushing that
has 1 inch NPT threads. The sensor is
designed to be installed from the
outside of the foam tank through a
bulkhead fitting or boss with 1 inch FNPT
threads. Mount the sensor in the bottom
of the foam tank in an upright position.
Use suitable sealant to prevent
concentrate leakage.
NOTE:
There must be sufficient
space under the foam tank for the
low tank level sensor wires to be
routed to the foam pump/motor
assembly. Be sure not to remove the
float from the shaft on the low tank
level sensor assembly. If the float is
installed in the reverse position, “
lo
A” will appear on the control unit
and the system will automatically
shut down even if there is foam in the
tank.
2. Check low tank level sensor
operation with a powered test light.
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. Remove float and reinstall 180
o
out of position. Reinstall clip.
TOP MOUNT LOW LEVEL SENSOR
INSTALLATION
A top mount low level sensor assembly is
available for installations where the sides
or bottom of the foam tank are not
accessible or sensor service is required
without draining the foam tank. The
sensor assembly is flange mounted in an
access hole at the top of the foam tank.
The two section telescoping assembly
permits adjustment of low tank level
sensor position for various foam tank
depths from 31-½ to 60 inches (800 to
1524 mm). Flange cutout dimensions
shown in figure 8.
a. Using dimensions in figure 8, layout
and drill holes in the top of the foam
tank. The center of the sensor should
be located at least 1-½ to 2 inches
(38 to 51 mm) from the sides of the
foam tank.
NOTE:
The minimum depth of foam
tank for installation of the top mount
sensor without cutting the tube
sections is 31-½ inches (800 mm). If
the tank depth is less than 31-½
inches (800 mm) cut the tubing as
described in step c.
Figure 7. Side Mount Foam Tank Low Level
Sensor Installation
1-½ to 2 in.
(38 to 51 mm)
BULKHEAD
FITTING
LOW TANK
LEVEL SENSOR
ASSEMBLY
BOTTOM OF FOAM TANK
FLOAT POSITION
(INSUFFICIENT FOAM
CONCENTRATE IN TANK)
FLOAT POSITION
(SUFFICIENT FOAM
CONCENTRATE IN TANK)
