Finish Thompson AC 4 & 5 HORIZONTAL SERIES - Manual

1
discharge, a vacuum switch on the suction, or a motor minder to
monitor motor current draw.
PUMPING LIQUIDS THAT MAY SOLIDIFY OR CRYSTALLIZE:
Add a flush system to the pump’s piping to prevent accumulation of material
inside the pump. Install water inlet and outlet valves as shown in Figure 1.
Refer to the “Operation” section of these instructions for the flush procedure.
ELECTRICAL CONNECTIONS
1. Perform the motor wiring according to NEC requirements and local
electrical codes.
2. Wire the motor for clockwise rotation when facing the fan end of the
motor.
3. To verify correct rotation of the motor:
a. Install the pump into the system.
b. Fully open the suction and discharge valves.
c. Allow fluid to flow into the pump. Do not allow the pump
to run dry. Running the pump dry can damage internal parts.
d. Jog the motor (allow it to run for only 1-2 seconds) and
observe the rotation of the motor fan. Refer to the directional
on the arrow pump if needed.
NOTE: A pump running backwards will pump, but at a greatly
reduced rate.
OPERATION
FLOODED SUCTION SYSTEMS
1. Fully open the suction and discharge valves.
2. Start the pump and verify liquid is flowing. If there is no liquid
flow, refer to the “Troubleshooting” section of these instructions.
3. Adjust the flow rate and pressure by regulating the discharge valve.
CAUTION: Never attempt to adjust the liquid flow with the suction
valve. Limiting suction will damage pump components.
FLUSHING SYSTEMS EQUIPPED WITH FLUSH VALVES:
1. Fully close the suction and discharge valves.
2. Connect the water supply to the water inlet valve and connect a
drain hose to water outlet valve.
3. Turn on the water supply and open the inlet and outlet valves. Flush
the system until the pump has been cleared of any material buildup
(usually approximately 5 minutes).
4. Close the water inlet and outlet valves and turn off water supply.
ASSEMBLY
PUMPS WITH MOTORS
1. No assembly required. Unpack the pump and motor and examine
for any signs of shipping damage. If damage is detected, save the
packaging and notify the carrier immediately.
2. Proceed to the “Installation” section of these instructions.
PUMPS WITHOUT MOTORS
Note: Do not remove shipping plug located in suction port of the
pump until the pump is completely assembled onto the motor.
1. Unpack the pump and examine for any signs of shipping damage.
If damage is detected, save packaging and notify the carrier immediately.
2. Place the motor on the fan cover. Align any set screw (item 9) with
key slot in motor shaft. Place the aluminum motor adapter (item
8) onto the motor rabbet. Position the slot (shaft sleeve set screw
access hole) in motor adapter with the top of the motor. Line up
the bolt holes in the motor adapter with the bolt holes in the motor
face. Install (4) bolts and lock washers (items 10,11). Securely
tighten.
3. Through the top and bottom access holes, tighten securely two of
the four set screws on the shaft adapter (item 6). You will need an
1/8” Allen wrench for this.
4. Remove the screw from the shipping plug and then remove the plug
from the suction port. Rotate the motor fan until you can tighten
the two remaining set screws on the shaft adapter.
5. Rotate the motor fan by hand and check for impeller rubbing. If
the impeller rubs loosen the shaft adapter set screws and adjust
the impeller accordingly. Retighten the shaft adapter set screws.
6. Proceed to the “Installation” section of these instructions.
INSTALLATION
MOUNTING
Motor or base plate must be securely fastened.
PIPING TO AND FROM THE PUMP
• Always support the piping near the pump to minimize stress
and strain on the pump’s casing.
• Minimize frictional losses by increasing the suction piping size
by one diameter.
• Use a minimal number of bends on suction piping. Keep
bends beyond a distance of ten pipe diameters from the pump.
• Install shut off valve on the suction line and flow control valve
in the discharge line. Place the valves beyond a distance of ten
pipe diameters from the pump.
• Ensure that the piping is leak free.
• Position the pump as close to the liquid source as possible.
• Maintain a flooded suction at all times or prime the pump and
maintain prime at all times.
CAUTION: Suction prime must be maintained at all times.
Running the pump dry will cause damage to pump components.
To protect the pump if prime is lost, use a pressure switch on the
AC 4 & 5 HORIZONTAL SERIES
Sealed Metallic Centrifugal Pumps
Installation and Maintenance Instructions
Figure 1