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INSTALLATION
1. Place the pump in the desired location on the floor.
2. Install the piping necessary to connect the drain to the 1 ½" inlet. A trap is recommended. The use of
unions or slip fittings is also recommended to encourage proper pump maintenance. Install the vent line
and run it to a suitable location. This allows proper venting of the tank.
3. A check valve is required and should be of a soft seat swing check design. A spring loaded ball check is
permissible if the lift is one half of the pump shut off level and the spring pressure is equal to, or less than
one (1) psi.
4. The installation of a shutoff valve is recommended in the discharge line. This will allow the discharge flow
rate to be modified, if required to match inlet flow and prevent short cycling of the pump in low lift
installations. In addition, it will allow service to the check valve or the pump without draining the
discharge line.
5. Remove the tagged shipping pin to release the float for automatic operation.
ELECTRICAL CONNECTIONS
This pump uses a DUAL VOTAGE motor. It will operate on 115 or 230 VAC, 60 Hz, single phase power. THIS
UNIT IS FACTORY WIRED FOR 115 VAC OPERATION. Refer to the motor label for 230VAC wiring, if required.
Be sure to follow all applicable electrical codes
Figure 1
OPERATION
The L4 & SC-1A pumps operate automatically. Waste
water drains into the tank where it raises the float to
a pre-set power on point. The water is pumped out
the discharge and through the check valve to the
drain line. The float drops with the water level to a
pre-set power off point. The check valve keeps the
water from draining back to the tank. (check valve is
not included)
MAINTENANCE
The majority of maintenance is preventative. Keep
foreign objects out of the inlet and tank by using an
inlet screen and lint trap. Be aware that the vent line,
check valve, and discharge piping contribute to
system performance. Turn off power to the pump
before performing any maintenance or tests.
To inspect the tank interior and float/switch, remove
the five (5) switch screws that attach it to the tank.
Inspect and clean the float as required. If the tank
requires cleaning the pump must be removed from
the plumbing lines first.
Literature # 900986 2019
LOW VOLTAGE—AUXILIARY SAFETY SWITCH– Units designated
with an 'x' in the model number (L4x) have a built in safety switch.
Connect the leads of auxiliary safety switch to the thermostat
control circuit of the air conditioner/furnace. This will disrupt the
thermostat demand in a high water condition. (Figure 1)
CAUTION –Thermostat demand disruption should not be utilized if
cooling or heating requirements are a necessity. An alarm system
should be used with the auxiliary switch instead.
The switch is wired normally closed. To wire for normally open
operation open the switch cover and move the yellow wire from
the bottom terminal to the middle terminal on the white switch.
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