Gorman-Rupp Pumps SFV4C 1474143 and up User Manual
Page 13
SF SERIES
OM-06403
PAGE B - 5
INSTALLATION
Liquid Level Devices
Optional controls available from Gorman‐Rupp
may provide a means to automatically regulate the
liquid level. These control boxes may be con
nected to the following sensing devices which per
form either filling or dewatering functions (see Fi
gure B-3).
The internal wiring of the sensing devices
are different for filling and dewatering func
tions. Be sure to follow the instructions in
cluded with the option before making con
nections.
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.
Other types of liquid level devices may also be
used. Consult the factory for the liquid level device
best suited for your application.
Liquid level devices must be positioned far
enough to allow 6 minutes between starts.
If the pump motor cycles more than 10
starts per hour, it will over‐heat, resulting in
damage to the motor windings or control
box components.
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-3. Liquid Level Devices