Priming The Pump - Franklin Electric DDD Serie Manual Del Usuario

TYPICAL DISCHARGE PLUMBING OPTIONS
VERTICAL DISCHARGE
HORIZONTAL DISCHARGE
Gate Valve

PRIMING THE PUMP

Fill the pump and suction piping completely with water
Discharge
before starting. Never operate the pump without water
Union Tee
Pipe
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
Suction Pipe
pump, refill 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 Figure 1. The
motor shaft has flat surfaces at that point.
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.
4. Remove the rotating part of the seal by first 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.
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.
Gate Valve
Tee
Discharge Pipe
Base
Suction Pipe
Foot Valve
Priming Plug
Base
Foot Valve
HORIZONTAL DISCHARGE
Gate Valve
Discharge
Union
Pipe
Suction Pipe
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 firmly in
place with fingers, If it cannot be positioned with the
fingers, 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.
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
first, 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.
3
Base
Suction Pipe
Foot Valve
Priming Plug
Tee
Foot Valve
Base