S SERIES PUMPS
OM-07264
PAGE B - 9
INSTALLATION
S
Diaphragm Type:
two fixed‐position sen
sors (upper and lower) each contain a dia
phragm which flexes with changes in liquid
level, thus activating an enclosed miniature
switch.
S
Bulb (Float) Type:
a bulb raises or lowers
(floats) with the liquid level, thus activating
an enclosed miniature switch.
Models under 6 horsepower require an additional
control box to incorporate liquid level controls. For
models over 6 horsepower, the circuitry may be
prewired as a factory option, or easily added to the
standard control box in the field by qualified per
sonnel. The unit is complete except for the remote
float switches. For installation and operation, see
the detailed instructions included with the optional
package.
Liquid level devices
must
be positioned far
enough apart to allow 10 minutes between
starts. If the pump motor cycles more than
6 starts per hour, it will over‐heat, resulting
in damage to the motor windings or control
box components.
Other types of liquid level devices may also be
used. Consult the factory for the liquid level device
best suited for your application.
If the pump requires liquid level devices,
install the liquid level devices and connect
them to the control box in accordance with
the instructions accompanying the de
vices.
PUMP
CONTROL BOX
LIQUID LEVEL
RANGE
ON (FILLING)
TO LEVEL CONTROL CIRCUIT
IN MAIN CONTROL BOX
BULB (FLOAT TYPE)
OFF
DEWATERING
PUMP
CONTROL BOX
TO LEVEL CONTROL CIRCUIT
IN MAIN CONTROL BOX
LIQUID LEVEL
RANGE
OFF
DEWATERING
ON (FILLING)
DIAPHRAGM TYPE
Figure B-4. Liquid Level Devices
