Gorman-Rupp Pumps T10A60S-6068T 1268074 and up - Manual (Page 12)

SUPER T SERIES OM−05521
PAGE B − 5 INSTALLATION
Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity
FLOAT SWITCHES
Installation
The standard pump is equipped with an auto-start
control system, and can be conformed to start and
stop as the liquid level in the wet well or sump rises
and falls. The autostart unit employs either a single
or double float switch system, where a bulb raises
or lowers (floats) with the liquid level, thus activat-
ing an enclosed miniature switch. The floats are
equipped with a socket type connector that plugs
into a matching receptacle on the auto-start control
box.
Standard floats are equipped with 50 feet (15,2 m)
of cable.
When installing the floats, note the following:
a. Be sure to provide sufficient room in the wet
well or sump so that floats do not get ob-
structed or drawn into the suction line. If a flex-
ible suction hose is used, it may be extended
to lay along the bottom of the wet well or sump
and the float can be attached to the hose
above the point where it bends along the bot-
tom. Direct the suction line toward the flow,
and the float(s) away from the flow. If a stand-
pipe is available, attach the float switch cable
to the standpipe in the sump at the approxi-
mate desired liquid level.
b. In a single float system, the cable can be teth-
ered to the suction line or standpipe approxi-
mately 6 inches (152 mm) above the float.
This setting allows approximately 9 inches
(229 mm) of liquid rise between pump start/
stop. The start/stop interval may be increased
by extending the float end of the cable. The
liquid level in the sump will increase approxi-
mately 8 inches (203 mm) between start/stop
intervals for every 6 inches (152 mm) of cable
increase.
c. If a double float switch system is used, posi-
tion the Start" float at the desired high water
level in the sump, and the Stop" float at the
desired low water level in the pump.
d. Refer to Figure 3 for additional float switch
data.