Installation Guide

CAUTION: For best performance of check valves, when handling solids install
in a horizontal position or at no more than at a 45° angle. Do not install check
valve in a vertical position as solids may settle in valve and prevent opening
on start-up.
When a check valve is used drill a 3/16” hole in the discharge pipe
approximately 1” to 2” above the pump discharge connection and below check
valve to prevent air locking of the pump.
WIRING
Check local electrical and building codes before installation. The installation
must be in accordance with their regulations as well as the most recent National
Electrical Code (NEC).
To conform to the National Electrical Code, all pumps must be wired with 14
AWG or larger wire. For runs to 250’, 14 AWG wire is sufficient. For longer runs
consult a qualified electrician or the factory.
Pump should be connected or wired to its own circuit with no other outlets
or equipment in the circuit line. Fuses and circuit breaker should be of ample
capacity in the electrical circuit. See chart below.
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REMOTE FLOAT SWITCH LEVEL CONTROL
The RFS series pumps are equipped with a remote float switch level control.
This level control is sealed in a polypropylene float cylinder. For automatic
operation, the pump must be plugged or wired into a remote float switch. Pump
will run continuously if plugged directly into an electrical outlet.
When the level rises in the basin, the cylinder floats up with the level. When the
cylinder position is at an angle of about 45°, the switch activates and starts the
pump motor.
As the level draws down, the cylinder floats down and when it is again at an
angle of about 45°, the switch deactivates, and the pump motor stops.
NOTE: BE CERTAIN PUMP IS SECURE IN BASIN AND CYLINDER FLOATS
UNOBSTRUCTED WITHOUT TOUCHING THE BASIN WALLS OR PLUMBING.
REMOTE FLOAT SWITCH INSTALLATION
1. The float switch consists of three parts:
a. switch
b. cord clamp
c. clamp screw
NOTE: If screw is lost, use a #10-16 x 1/2” long tapping screw.
2. Attach cord clamp to pump cover as shown in the switch instruction manual
packaged with the switch. The clamp and pump handle must be positioned
as shown to allow free operation of float. Be sure to locate pump and switch
power cords away from switch float.
3. A 3.5” tether length is recommended.
H.P. VOLTAGE
FUSE OR
CIRCUIT BREAKER AMPS
4/10 115 20
4/10 230 15
When a tether length of 3.5” is used, a minimum basin diameter of 18” is
recommended. The tether length is measured as shown in Figure 3.
4. After desired tether length is established, hand-tighten clamp screw.
5. TESTING: Without water in basin plug pump power cord into switch in-line-
plug. Plug switch into outlet. Lift float and watch for pump to operate. Do
not run pump for more than 5 seconds.
TESTING PUMP OPERATION
RFS SERIES SEWAGE EJECTOR PUMPS
1. These pumps are equipped with a remote float switch.
2. These pumps are installed in a basin with a sealed cover, so switch
operation cannot be observed. The sump cover usually will have a spare
hole that is plugged with a rubber plug. This plug can be removed and
switch operation can be observed.
3. Plug power cord and remote float switch power cord into a grounded
receptacle with voltage consistent with pump voltage as indicated on pump
nameplate.
4. Run water into basin until pump starts.
5. Be sure gate valve in discharge line is open.
6. Allow pump to operate through several on-off cycles.
MANUAL SEWAGE EJECTOR PUMPS
The pump cord for these pumps can be plugged directly into a properly
grounded receptacle with voltage consistent with pump nameplate for
continuous pump operation.
CAUTION: This type of operation should be used only for emergency use or
when a large volume of water is to be pumped. Pump must not be allowed to
run dry. If pump is run dry, it may damage pump and void the warranty.
MAINTENANCE AND SERVICE
If pump does not operate properly, consult the Troubleshooting Chart. If trouble
cannot be located with these steps shown, consult your pump dealer or take
pump to a Little Giant authorized service center.
CAUTION: When working on pump or switch, always unplug pump power
cord in addition to removing fuse or shutting off circuit breaker before working
on pump.
CLEANING IMPELLER AND VOLUTE
1. Remove screws that hold volute to motor housing.
2. Remove volute and clean impeller and volute passage. Do not use strong
solvents on impeller.
3. Be sure impeller turns freely after cleaning.
4. WARNING: DO NOT REMOVE IMPELLER. REMOVAL OF IMPELLER REQUIRES
SPECIAL TOOLS AND IS TO BE DONE ONLY BY AN AUTHORIZED SERVICE
CENTER.
DO NOT REMOVE MOTOR HOUSING COVER. WARRANTY IS VOID IF MOTOR
HOUSING COVER, IMPELLER OR SEALS HAVE BEEN REMOVED.
ANY REPAIR ON MOTOR MUST BE DONE BY AN AUTHORIZED LITTLE GIANT
SERVICE CENTER.
2
Figure 3.
Figure 2.