Finish Thompson DB22 SERIES - Manual (Page 8)

8
o-ring (item 8B) in the groove in the motor adapter (mo-
tor end). Use 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 a flat surface with the drive and
motor face hanging over the bench surface. Secure the mo-
tor to the bench.
Firmly grab the pump and slide over the outer drive magnet
until the motor adapter is seated in the rabbet of the motor
(184TC) or the motor adapter flange. The last 4-5” (10-12
cm) will have strong magnetic attraction between the pump
and outer drive magnet. See figures 6 and 7.
NOTE: The clearance between the motor adapter and drive
magnet is tight (about .010”/.254 mm).
Figure 6 Figure 7
6. Secure the pump to the motor using (4) 1/2” socket head
cap screws, lock washers and flat washers (items 14, 15,
16). Use 3/8” Allen wrench or 3/8” hex socket on universal
joint. See figures 8 and 9.
Figure 8 Figure 9
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. NPSH available should be
two feet (.6 meters) greater than NPSH required.
• Install the pump as close to the suction source as possible.
• Support the piping independently near the pump to eliminate
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.
• If flexible hose is preferred over pipe, use a reinforced hose
rated for the proper temperature, pressure and is chemically
resistant against the fluid being pumped.
• The suction valve must be completely open to avoid restrict-
ing the suction flow.
• When installing pumps with flanges, we recommend use
of low seating stress gaskets such as Gore-Tex or Gylon
(expanded PTFE).
Motor/Electrical
Install the motor according to NEC requirements and local electri-
cal codes. The motor should have an overload protection circuit.
Wire the motor for clockwise rotation when facing the fan end of
the motor.
CAUTION: Do not operate the pump to check rotation until
the pump is full of liquid.
Check all electrical connections with the wiring diagram on the
motor. Make sure the voltage, frequency, phase and amp draw
comply with the supply circuit.
To verify correct rotation of the motor:
1. Install the pump into the system.
2. Fully open the suction and discharge valves.
3. Allow fluid to flow into the pump. Do not allow the pump to
run dry (ceramic, PTFE and silicon carbide bushings can’t be
run dry without damage to pump components).
4. Jog the motor (allow it to run for 1-2 seconds) and observe
the rotation of the motor fan. Refer to the directional arrow
molded into the pump casing if necessary.
NOTE: A pump running backwards will pump but at a greatly
reduced flow and pressure.
Figure 4 Figure 5
5. Install the pump end on the motor/drive magnet assembly.
NOTE: If the pump has the optional o-ring sealing option
(available on 184 and 215 frame pumps only), install the
7. Rotate the motor fan to ensure that there is no binding in
the pump.
8. Proceed to Installation Section