Finish Thompson GP11 User Manual
GP11 SERIES Sealed
Non-Metallic Centrifugal Pumps
Installation and
Maintenance Instructions
ASSEMBLY
Unpack pump from carton and check for shipping damage.
PUMPS WITH MOTOR
No assembly required. Simply unpack the pump and motor and
examine for any shipping damage. If damage is detected, save
the packaging and notify the carrier immediately.
Remove the shipping plugs from the suction and discharge of
the pump and proceed to the “Installation Requirements” section of these instructions.
PUMPS WITHOUT MOTORS
1. Unpack the pump and examine for any shipping damage.
If damage is detected, save the packaging and notify the
carrier immediately. Use the “Supplied and Optional Parts”
section of these instructions to verify that all items have
been received.
2. Prepare to install the pump onto the motor.
a. Remove the protective shroud (Item 22) from the motor
adapter (item 6).
b. Ensure that the set screws in shaft adapter (Item 20)
are loosened to avoid interference when installing.
c. Coat the motor shaft with an anti-seize compound prior
to installation.
3. Properly adjust the spacing between the impeller (item 3)
and the housing cover (item 2).
NOTE: Proper spacing of the Impeller to the housing cover
is critical for performance and to avoid damage to pump
components. A .050” gap is required.
a. Slide the shaft adapter onto the motor shaft until the
impeller is tight against the inside of the housing
cover (look through the pump’s discharge to verify).
Make sure that the shaft adapter’s set screws do not
line up into the motor shaft’s key way.
b. Temporarily bolt the motor adapter to the motor, placing
shims (flat washer - item 10) between the motor
adapter and the motor using two hex-head cap screws
(Item #11) 180° apart (see Figure 1).
c. Tighten the four set screws from the shaft adapter onto
the motor shaft.
d. Remove the two temporary hex-head cap screws and
shim washers.
4. Pull the motor adapter flush against the motor face. Install
Figure 1
four hex-head cap screws and flat washers through the
motor adapter and into the motor and tighten.
5. Verify there is a .050” gap between the impeller and housing cover by looking into the discharge of the pump.
6. Reinstall the protective shroud.
7. Install the pump into your system according to the “Installation Requirements” section of these instructions.
INSTALLATION
MOUNTING
Motor or base plate must be securely fastened.
PIPING
• Always support the piping near the pump to minimize
stress and strain on the pump’s casing.
• Minimize frictional losses by increasing the piping size by
one diameter.
• Use a minimal number of bends, keeping any bends at
least a distance of ten pipe diameters away from the pump.
• Install valves on the suction and discharge lines. Place the
valves within a distance of ten pipe diameters away 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.
PUMPS WITH COOLING (PRESSURE) COLLARS
A cooling collar provides a water flush to the pump’s seal. This
is necessary when pumping hot liquids or liquids that tend to
build up or crystallize around the seal faces. If your pump is
supplied with a cooling collar, proper water flow and pressure
are critical to the operation of the pump.
1. Plumb a water supply to the cooling collar. Use 1/8” NPT
threaded holes for the water inlet and drain lines. Either
hard pipe or flexible tubing is suitable.
2. Adjust the water flow and pressure of the flush/cooling
water BEFORE starting the pump.
1
• For pumps with bellows or multi-spring seals, supply
one to two gallons water flow per hour at 1 - 2 psi.
• For pumps with a double seal, supply one to two
gallons per hour water flow at 5 - 10 psi ABOVE the
discharge pressure of the pump.
1. Never run a pump equipped with a cooling collar
2. Do not over-pressurize the cooling collar’s water
CAUTIONS:
without a proper water supply. Doing so will result in
damage to the pump. Use of a flow switch is
recommended.
supply. Doing so can result in damage to pump
components.
OpErATION
FLOODED SUCTION SYSTEMS
1. Fully open the suction and discharge valves.
2. If a cooling collar is used, turn on the cooling water.
3. Start the pump and verify liquid is flowing. If there is no
liquid flow, refer to the “Troubleshooting” section of these
instructions.
4. Adjust the flow rate and pressure by regulating the discharge valve.
CAUTION: Never attempt to adjust the liquid flow with
the suction valve. Limiting the suction will result in damage to pump components.
SpEcIAL pIpINg SITuATIONS
SUCTION LIFT
1. Install a priming chamber on the feed side of the pump or
appropriate piping on the discharge for priming the pump.
2. Install a foot valve on the bottom of the suction piping to
maintain a prime to the pump.
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 discharge, a vacuum switch on the
suction, or a motor minder to monitor motor current draw.
PUMPING LIQUIDS WHICH 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 2. Refer to the “Operation” section of
these instructions for the flush procedure.
Figure 2
ELEcTrIcAL cONNEcTIONS
1. Perform the motor wiring according to NEC requirements
and local electrical codes.
2. Wire the motor for counter clockwise rotation when facing
the face of the motor .
CAUTION: Before starting the pump, momentarily
“jog” the motor while looking through the suction of the
pump to determine if the motor is wired for the correct rotation. Refer to the directional arrow on the pump.
SUCTION LIFT SYSTEMS
1. Fully open suction and discharge valves.
2. If a cooling collar is used, turn on the cooling water.
3. Prime the pump by filling the priming chamber. Allow time
for any trapped air in the suction piping to escape.
4. Start the pump. Adjust the flow rate and pressure by
reguating the discharge valve.
CAUTION: Never attempt to adjust the liquid flow with
the suction valve. Limiting the suction will result in damage to pump components.
FLUSH SYSTEMS
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 (approximately 5 minutes).
4. Close the inlet and outlet valves and turn off water supply.
SEALS
SEAL REMOVAL AND INSPECTION
1. Disconnect the piping and electrical power from the pump.
2. Disassemble the pump from the motor adapter.
a. Remove the six hex-head cap screws from the
impeller housing. The impeller housing will loosen if
gently tapped at the discharge outlet.
b. Remove the protective shroud from the motor adapter.
c. While preventing the motor shaft from moving (insert
a screwdriver into the motor’s fan), unscrew the
impeller from the motor shaft. Remove the impeller,
seal, cooling collar (if applicable) and housing cover
as one assembly from the motor shaft.
NOTE: For pumps using a 56C/145TC or motor adapter,
leave the shaft adapter secured to the motor shaft.
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