Finish Thompson SP22 Series Self-Priming - Manual (Page 7)

7
NOTE: The clearance between the motor adapter and drive
magnet is tight (about 010”/ 254 mm)
5 Install the pump end on the motor/drive magnet assembly
For 182, 184, 213 and 215TC motor frame pumps, install
the o-ring (item12B) in the groove in the motor adapter
(motor end) Use a small amount of petroleum jelly (or
silicone grease on EPDM o-rings) to help hold the
o-ring in place
Place the motor/drive on the floor with the drive and
motor face pointing up
Firmly grab the pump and slide over the outer drive mag-
net until the motor adapter is seated in the rabbet of the
motor (184TC) or the motor adapter flange See figures
6 and 7 The last 4-5” (10-12 cm) will have strong mag-
netic attraction between the pump and outer drive magnet
6 Secure the pump to the motor using (4) 1/2” socket head
Figure 6 Figure 7
cap screws, lock washers and flat washers (items 18, 19,
20) Use 3/8” Allen wrench or 3/8” ballpoint hex socket on
universal joint See figures 8 and 9
7 Rotate the motor fan to ensure that there is no binding in
the pump
8 Proceed to Installation Section
Section II - Installation
Mounting – Pump foot should be securely fastened to a solid
foundation If the pump was received with plastic shipping shims,
these may be used as additional support for the motor feet
CAUTION: The NPSH available to the pump must be greater
than the NPSH required The amount of lift, frictional pipe
loss and vapor pressure must be calculated into the applica-
tion NPSH available should be two feet ( 6 meters) greater
than NPSH required
Figure 8 Figure 9
• Total suction lift including pipe friction loss and cor-
rections for specific gravity must not exceed 25 feet
(7 6 meters) Contact FTI for pumps installed where
the elevation exceeds 1,000 feet (305 meters)
• Install the pump as close to the suction source as possible
• SP Series pumps are designed to operate in a hori-
zontal position only with discharge on the top
• SP Series pumps self-priming capability is due to its
ability to create a vacuum in the suction piping The suc-
tion piping MUST be airtight at fittings and connections.
• Support the piping independently near the pump to elimi-
nate any strain on the pump casing In addition, the piping
should be aligned to avoid placing stress on the pump
casing
• The suction side of the pump should be as straight
and short as possible to minimize pipe friction
• The suction line should not have any high spots This can
create air pockets that can reduce pump performance
The suction piping should be level or slope slightly
upward to the pump
• The suction pipe should be 2” or 3” Larger suction piping
will affect priming ability Smaller piping affects NPSH
available and pump performance See priming curves on
page 4 or performance curves in SP Series curve booklet
• Provide for adequate suction submergence Excessive
submergence will reduce pump performance
• The end of the pipe should be at least 3” (7 6 cm) above the
bottom of the suction tank
• If debris is in the suction tank, a strainer can be installed to
help prevent foreign matter from entering the pump The