Franklin DDD, DDS User Manual

CENTRIFUGAL PUMPS
DDD/DDS SERIES

OWNER'S MANUAL

READ AND FOLLOW SAFETY INSTRUCTIONS

This is the safety alert symbol. When you see

this symbol on your pump or in this manual, look
for one of the following signal words and be alert to the
potential for personal injury:

DANGER

serious personal injury, death or major property damage
if ignored.

WARNING

serious personal injury, death or major property damage
if ignored.

CAUTION

cause minor personal injury or major property damage if
ignored.

The label NOTICE indicates special instructions, which
are important but not related to hazards.

WARNING

Hazardous voltage.
Can shock, burn, or
cause death.

Ground pump before
connecting to power
supply. Disconnect
power before working
on pump, motor
or tank.

Meet National Electrical Code, Canadian Electrical

Code, and local codes for all wiring.

Follow wiring instructions in this manual when

connecting motor to power lines.

warns about hazards that will cause

warns about hazards that can cause

warns about hazards that will or can

Carefully read and follow all
safety instructions in this
manual and on pump.

Keep safety labels in good
condition.

Replace missing or damaged
safety labels.

Wire motor for correct

voltage. See “Electrical”
section of this manual and
motor nameplate.

Ground motor before

connecting to power supply.

BEFORE INSTALLING PUMP, BE SURE TO READ
THIS OWNER’S MANUAL CAREFULLY.

CAUTION

Fill pump with water before starting or pump will be
damaged. The motor on this pump is guaranteed by
the manufacturer and in event of failure it must be
returned to an authorized service station for repairs.
Motor warranty is void if repairs aren’t made by an
authorized repair station.

Mechanical shaft seals do not run dry.

INSTALLATION

Suction Piping

The pump should be installed as close as possible to
the source of water in order to minimize the length of
suction piping. The suction pipe should never be smaller
in diameter than the suction opening of the pump. It
must be free of all leaks, and should slope continuously
upward from the water source to the pump, with no high
spots, which can trap air. A foot valve must be used to
maintain the prime.

General Piping Instructions

In order to avoid strain on the pump, both the suction
and discharge piping should be properly supported,
and a pipe wrench should be put on the suction and
discharge bosses when installing pipes in them.

Electrical Connections

Remove the end cover (canopy) from the motor, and
using the diagram on top of the motor, make sure it is
connected for the correct voltage.

The motors on “DD” Series pumps are designed to be
used with either 115 or 230 volt supply by changing
connections as shown on the diagram.

CAUTION

Connecting the motor to the wrong

voltage can cause serious damage.

“Table 2” lists branch fuse size ratings and
recommended supply wire for each pump.

If any type of wrench must be used on the impeller, be
sure to protect the impeller surfaces by putting a shop
cloth or other protection between the wrench and the
impeller.

Figure 1

Grounding the motor

Make sure that the green lead wire is securely
connected to the green ground terminal screw on
the motor terminal board, “Fig. 1”. This wire must be
connected to the electrical system ground (provided by
the power company) or to another adequate ground.

CAUTION

Failure to ground the pump properly

can result in serious or fatal injury.

Typical Discharge Plumbing Options

Vertical Discharge

Gate Valve

Te e

Discharge Pipe

Base

Suction Pipe

Foot Valve

Horizontal Discharge

Discharge Pipe

Union

Suction Pipe

Gate Valve

Te e

Priming Plug

Base

Foot Valve

Terminal
Board

Capacitor

Ground
Screw

4. Remove the rotating part of the seal by fi rst removing
the square rubber drive ring (Figure 2) with a small
screwdriver or knife blade. The remainder of the
rotating portion is then loose and may be removed
easily.

Figure 2

Impeller

Face of
Sealing Washer

Shaft Shoulder

Impeller Hub

Rubber
Drive Ring

Priming the Pump

Fill the pump and suction piping completely with water
before starting. Never operate the pump without water
in it. The mechanical shaft seal and impeller can be
damaged if run dry. If the pump does not deliver water
in 20 - 30 seconds, some air may be trapped. Stop the
pump, refi ll with water, and start again.

SERVICE THE PUMP

1. Remove the motor from the pump case.

2. Take off the motor end cover (canopy).

3. Remove the impeller from the motor. To keep the
motor shaft from turning while unscrewing the
impeller, hold shaft by inserting a 7/16” (11.1 mm)
open-end wrench at the 7 o’clock position of the
switch end of the motor, as shown in Figure1. The
motor shaft has fl at surfaces at that point.

5. Remove the seal plate, which is now free. Push
the seal seat out of the seal plate from the back
side. Clean the cavity, from which the seal seat was
removed. Also clean the motor shaft.

6. Replace the seal plate on the motor.

7. Dip the seal seat in a soap solution or clear water for
lubrication and install in the seal cavity. Press fi rmly in
place with fi ngers, If it cannot be positioned with the
fi ngers, put the cardboard washer (furnished with the
seal) on the seal face and press the seat in place with
a piece of pipe or other tool, as shown in (Figure 3).
Remove the cardboard washer and clean the polished
seal surface with a soft cloth. Be very careful not to
damage or scratch the surface.

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8. Make sure the shaft is clean.

9. Clean the face of the rotating part of the seal with a
soft cloth. Dip the assembly in a soap solution or clear
water and push onto the shaft, with the sealing face
fi rst, until the square rubber drive ring is completely on
the shaft shoulder.

10. Screw the impeller on the shaft until its hub is against

the shaft shoulder. This automatically positions all
seal parts properly.

11. Replace the motor on the case and base.

Figure 3

TROUBLESHOOTING

1. PUMP WON’T DELIVER ANY WATER

Review priming instructions. Make sure the pump and
suction line are full of water.

2. LOSS OF PRIME

a) Check the suction line and foot valve for leaks. The

entire suction side of the system must be totally
air tight.

b) Make sure the water level hasn’t dropped enough

to uncover the suction inlet. Suffi cient pipe would
be used to prevent this from happening.

Polished surface
or seat

Cardboard
Washer

Pipe or Tool

Table 2 - Electrical Information

Branch

HP Voltage

Max. Loads

Amperes

1/2

3/4

1

1-1/2

2

2-1/2

115 8.6 15 14 14 10 8 8 8

230 4.3 15 14 14 14 14 14 12

115 13.2 20 12 12 8 6 6 4

230 6.6 15 14 14 14 12 12 10

115 16.2 25 12 10 8 6 4 2

230 8.1 15 14 14 14 12 10 10

115 20.8 30 10 10 8 6 4 2

230 10.4 15 14 14 12 12 10 8

115 21 30 10 10 6 6 4 2

230 10.5 15 14 14 12 12 10 8

115 23 35 1086422

230 11.2 15 14 14 12 12 10 8

Fuse

Rating

Amperes

3. LOW FLOW OR PRESSURE

a) Check suction piping for leaks.

b) Check the impeller for clogging. Remove all foreign

material if it is clogged.

4. NOISE

a) Make sure pump and piping are supported.

b) Make sure suction lift does not exceed 20 ft.(6mm)

c) Check disch. piping for excessive bends or elbows.

d) Check motor bearing for damage.

Maximum Length of Cable Size Shown

50’ 100’ 200’ 300’ 400’ 500’

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