Franklin Electric B50S User Manual

WARNING - ELECTRICAL PRECAUTIONS
All wiring, electrical connections, and system grounding must
comply with the National Electrical Code (NEC) and with any local
codes and ordinances. Employ a licensed electrician.
CAUTION
• DO NOT OPERATE THIS PUMP DRY!
• Review instructions before operating.
CAREFULLY READ THESE SAFETY MESSAGES
IN THIS MANUAL AND ON PUMP.
SAFETY
APPLICATION
INSTALLATION
a) PUMP LOCATION: The pump should be installed in a clean,
dry and ventilated location which provides adequate drain-
age and room for servicing and protection from freezing
temperatures. It should be bolted down evenly on a good
foundation, preferably concrete, to prevent the development of
unnecessary stress. Locating the pump as close as possible
to the source of water supply reduces the friction losses in
the suction pipe and provides for maximum capacities.
b) SUCTION PIPE:
It is recommended that only new clean
pipe or hose be used and the size be the same as that of
the pump suction tapping. If the pump is installed any ap-
preciable distance away from the source of water supply,
the suction pipe should be increased by one size (this would
increase the priming time). The suction pipe must always
slope upwards from the water source to the pump to avoid
air pockets in the line. In cases where the pump has to be
reprimed often and it is not necessary that a lot of water be
delivered, it is advisable to use a 90° or 45° elbow on the
suction line. This enables the pump to prime sooner and also
prevents kinking of the hose. In cases where a maximum
volume of water is required over a prolonged period of time,
the suction line should be led almost horizontally to the
pump. Thread compound should be used on all pipe joints
and connections should be thoroughly tightened. A strainer
should be connected to the bottom end of the suction pipe
and it should be well submerged at all times.
c) WIRING: It is recommended that a separate circuit be used
from the distribution panel to the pump unit. A properly fused
disconnect switch is to be installed in the line, making sure
that the correct gauge of cable is used to carry the load. Very
long leads will require a larger cable. An electrician should
be employed to do the wiring.
This pump is suitable for installations where the vertical distance
from the pump to the water level does not exceed *25 ft.(7.6m),
including friction loss. In off-set installations, friction losses in the
suction pipe must be taken into consideration.
*Varies with elevation above sea level.
WARNING - RISK OF ELECTRICAL SHOCK
• Have an electrician provide electrical power to the motor.
• Motor must be grounded and terminal cover in place to
reduce electrical shock hazard.
• Keep motor operating area as dry as possible.
• Always disconnect power before servicing.
• Not investigated for use in swimming pool areas.
FOR DUAL VOLTAGE MOTORS:
Voltage change instructions are located on motor label or on
wiring access cover.
Total head in feet
20 30 40 50 55
Capacity in U.S. GPM
54 43 31 11 3
B50S Self-Priming Centrifugal
Utility Pump
OWNER'S MANUAL
BEFORE OPERATING OR
INSTALLING THIS PUMP, READ
THIS MANUAL AND FOLLOW
ALL SAFETY RULES AND
OPERATING INSTRUCTIONS.
SAFETY WARNINGS

Franklin Electric B50S Specifications

General

Model	B50S
Category	Water Pump
Motor Type	Submersible
Power Supply	Electric
Power Rating	0.5 HP
Maximum Flow Rate	50 GPM
Operating Temperature Range	32°F to 104°F
Phase	Single

Summary

Safety Warnings

Before Operating or Installing

Read this manual and follow all safety rules and operating instructions before installing or operating the pump.

Caution: Do Not Operate Dry

Review instructions before operating. Do not operate the pump dry to prevent damage.

Electrical Precautions

All wiring and connections must comply with NEC and local codes. Employ a licensed electrician.

Dual Voltage Motors

Voltage change instructions are located on the motor label or wiring access cover.

Risk of Electrical Shock

Ensure motor is grounded, keep area dry, disconnect power before servicing.

Application

Installation

Pump Location

Install in a clean, dry, ventilated location with adequate drainage and protection from freezing.

Suction Pipe

Use clean pipe/hose, same size as tapping, slope upwards, use strainer submerged.

Wiring

Use separate circuit, fused disconnect switch, correct gauge cable, employ electrician.

Operation - Priming the Pump

Priming

Fill pump casing with water through priming plug before starting to prevent damage.

Priming Under Pressure

Use check valve and air bleeder on discharge line for priming under pressure.

Impeller Rotation

The impeller must rotate in a counter-clockwise direction as seen facing the pump.

Starting the Pump

Never operate dry. Replace water with cold water if overheated or vapor locked.

Draining

Drain pump completely before freezing temperatures by removing drain and priming plugs.

Maintenance

Lubrication

The pump requires no lubrication. Refer to electric motor manual.

Replacing Mechanical Seal

Step-by-step guide for disassembling and reassembling the mechanical seal.

Reassembly Precautions

Check impeller rotation and ensure the shaft flinger is not removed.

Troubleshooting

Pump Fails to Prime or Primes Slowly

Lists causes like leaks, clogged lines, insufficient water, or high suction lift.

Reduced Pressure or Capacity

Lists causes such as collapsed/clogged suction hose, clogged impeller, or worn parts.

Limited Warranty