Finish Thompson KC 5.5, KC6, KC6H, KC7, KC 8 User Manual

KC 5.5, 6, 6H, 7, 8, & 10 SERIES

Non-Metallic Centrifugal Pumps

Installation and Maintenance Instructions

ASSEMBLY

Unpack the pump, drive magnet assembly and hardware package
from carton and check for shipping damage.

WARNING: Magnetic field hazard. This pump contains powerful
rare earth magnets. When the pump is disassembled (not connected
to a motor) and the magnets are exposed, these magnets produce
powerful magnetic fields. Individuals with cardiac pacemakers,
implanted defibrillators, other electronic medical devices or sickle
cell anemia must not handle or be in the proximity of the magnets
contained inside the pump. Consult a health care provider for specific
recommendations before working with this pump.

ATEX COMPLIANT PUMPS

All assembly, installation, and maintenance instructions are the same
as standard pumps with the exceptions noted on page 4 under “Safety
Precautions for ATEX pumps.”

Figure 1

10A,10B, & 10C) from hardware package.

4. Manually rotate pump assembly to ensure that the pump
is not binding or rubbing on the drive magnet assembly.

5. Install the pump into the system according to installation
instructions.

PUMPS WITH MOTORS

Proceed to Installation Section.

PUMPS WITHOUT MOTORS

56C frame

1. Remove the pump, drive magnet assembly and hardware
package from box.

CAUTION: Keep away from metallic particles, tools and
electronics. Drive magnets MUST be free of metal chips.

2. Slide drive magnet assembly (item 6) onto the motor shaft
until it is between 3.110” and 3.120” as measured from the
motor face to the top of the drive magnet assembly. See
Figure 1. Align set screw (item 6B) with flat or key slot on
the motor shaft and tighten both setscrews with a 5/32” Al­ len wrench to 70 in.-lbs. (7.9 N-m ).

CAUTION: Do not operate/test the motor with the drive mag
net assembly exposed.

WARNING: Magnets are strong. To avoid damage and pinch-

ing fingers, tightly grasp pump assembly keeping finger tips
away from the area where the motor adapter and motor meet.

3. Carefully slide the pump assembly over the drive magnet
assembly. Orient the discharge port to either the 12 or
9 o’clock position. Make sure rabbet (step) on motor is fully
seated into the motor adapter (item 5). Align bolt holes in
motor adapter and motor. Install (4) bolts and washers (items

PUMPS WITHOUT MOTORS

63/B14, 71/B14 & 80/B14

1. Remove pump, drive magnet assembly and hardware
package from box.

CAUTION: Keep away from metallic particles, tools
and electronics.

2. Remove screws and washers (items 9A, 9B & 9C) from
impeller housing (item 1) and remove pump assembly
from motor adapter (item 5).

3. For 63 frame pumps - Adjust the single setscrew located in
the middle of the supplied shaft adapter so that it protrudes
slightly into the inside bore. Align that protruding setscrew
with the keyway or flat on the motor shaft and slide on the
shaft adapter until it bottoms out. Tighten the single set-
screw into the keyway, and then tighten the two setscrews
on the end of the adapter onto the motor shaft.

4. Install the motor adapter (item 5) onto the motor with the
access holes top and bottom. Secure with supplied hard-
ware (items 10A, 10B, and 10C). On 63 frame pumps,
from the motor side, insert the supplied gray spacer into the
base of the motor adapter and secure both to the motor.

5. For 63 frame pumps - Screw the cone point drive magnet
assembly setscrew (item 6B) in so that it protrudes
slightly into the drive bore. Align the protruding setscrew point

1

.

with the key slot on the shaft adapter and slide the drive
magnet assembly (item 6) on. Adjust the drive magnet
assembly (item 6) so that it is 1.016 mm (.040 +/- .005)
below the face of the motor adapter (see figure 2) and
tighten both setscrews with a 5/32” Allen wrench to 7.9 N.m
(70 in. lbs.).

STRAIGHT

EDGE

DRIVE

MAGNET

ASSY.

.040

Figure 2

For 71 and 80 frame - Align the cone point set screw (item
6B) on the motor shaft and slide the drive magnet assembly
(item 6) onto the motor shaft. Adjust the drive so that it is

1.016 mm (.040 + or -.005) below the face of the motor
adapter (see figure 2). Tighten both setscrews with a 5/32”
Allen wrench to 7.9 N-m (70 in-lbs.).

6. Place the impeller assembly (comprised of items 2 and 3) in
barrier (item 4). Grasping the barrier at opposite bolt tabs,
carefully lower the barrier assembly into the motor adapter/
drive assembly. Line up the tabs of the barrier between the
tabs on the motor adapter to avoid pinching fingers. Once
seated, rotate the barrier until bolt holes line up.

7. Install the o-ring (item 7) on the barrier. Lubricate the o-ring
with a compatible lubricant to facilitate installation.

8. Place the impeller housing (item 1) on the barrier being
careful not to dislodge the o-ring.

9. Align mounting holes and install 6 mounting screws and
washers (items 9A, 9B & 9C) from hardware package. Hand-
tighten screws using pattern shown in Figure 3.

Manually rotate the pump assembly to ensure that the pump
is not binding or rubbing on the drive magnet assembly.

10. Install pump into the system according to installation
instructions.

CAUTION: Do not operate/test the motor with the drive magnet
assembly exposed.

CAUTION: Drive magnets MUST be free of metal chips.

Note: Prior to start-up, double check the two set screws to as­sure that they are firmly tightened. Failure to do so could result
in internal damage. Rotate to assure clearance with the motor
adapter.

WARNING: Magnets are strong. To avoid damage and
pinching fingers, tightly grasp pump assembly keeping
finger tips away from the area where the housing and
motor adapter meet.

INSTALLATION

MOUNTING

Motor should be securely fastened.

PIPING

1. Support piping near the pump to eliminate any strain on
the pump casings.

2. Do not overtighten the piping on the discharge on initial
installation (i.e., down to the o-ring). Damage to the
discharge can occur. The o-ring is used only when there
is wear and the plastic threads are loose.

3. To minimize head loss from friction:
a. Increase pipe size by 1 diameter.
b. Use minimal number of pipe bends.

4. Keep bends and valves a minimum of 10 pipe diameters from
the suction and discharge.

5. Position pump as close to the liquid source as possible.

6. Maintain a flooded suction (liquid above pump prior to
being primed).

7. Ensure that the piping does not leak and suction is not
prone to clogging.

8. If flexible hose is preferred, use a reinforced hose rated for the

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3

6

5

proper temperature and pressure. This helps avoid collapse or
kinks.

9. Install valves on suction and discharge lines (a minimum of 10
pipe diameters from the pump).

10. For units in a suction lift system, install appropriate piping in
the discharge to allow priming of the pump.

2

Figure 3

4

11. The suction valve should be completely open to avoid
restricting suction flow.

CAUTION: To stop the pump if prime is lost, use one of the
following: (1) pressure switch on the discharge, (2) vacuum
switch on the suction, (3) a motor minder to monitor motor
current.

2

12. When pumping liquids that may solidify or crystallize, a
flush system should be added to the piping. See Figure 4.
Install water inlet and outlet valves as shown.

Note: This pump is provided with a provision for a customer
installed 1/4” NPT drain in the impeller housing. See Drain
Installation Section for details.

SUCTION LIFT SYSTEM

1. Prime the system by filling the priming chamber and/or
suction line with a liquid. Allow time for trapped air to
work its way out.

2. If priming via filling the suction line, close the discharge
valve prior to returning the suction line to the tank.

Figure 4

Discharge Valve

Suction

Valve

Water
Outlet

Valve

Water Inlet Valve

ELECTRICAL

1. Install the motor according to NEC requirements and local
electrical codes. The motor should have an overload protection
circuit.

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 (PTFE and ceramic bushings can’t be run dry
without damage to pump components).

d. Jog the motor (allow it to run for only one to two
seconds) and observe the rotation of the motor fan.
Refer to the directional arrow on the pump if needed.

Note: A pump running backward will pump but at a
greatly reduced flow and pressure.

OPERATION

FLOODED SUCTION SYSTEM

1. Completely open suction and discharge valves

2. Start the pump and check liquid flow. If there is no flow,
see the Troubleshooting section.

3. Adjust the flow rate and pressure by regulating the dis-
charge valve. Do not attempt to adjust the flow with the
suction valve.

FLUSH SYSTEMS

CAUTION: Some liquids react with water.

1. Completely close suction and discharge valves.

2. Connect water supply to water inlet valve.

3. Connect drain hose to water valve.

4. Open inlet and outlet valves. Flush system until pump is
clean (approximately 5 minutes).

MAINTENANCE

DISASSEMBLY

1. Disconnect power. Remove electrical wiring and motor
mounting bolts.

2. Close suction and discharge valves. Disconnect piping.

3. Securely hold or clamp the motor in place.

4. For metric pumps, skip to step 5. For 56C frame pumps,
remove the four motor adapter bolts (items 10A, 10B, &
10C) and pull the pump end straight off of the motor
face. Place the pump end on the table with the adapter
flange on the table and the suction pointing straight up.

5. Remove the six housing bolts (item 9A, 9B, & 9C) from
the pump.

6. Using a thin bladed screwdriver, gently separate the im-
peller housing (item 1) from the barrier (item 4). Re-
move the housing o-ring (item 7). Gently separate the
barrier from the motor adapter (item 5). On metric
pumps, carefully separate and rotate the barrier tabs so
that they are located in between the motor adapter bolt
holes. Gripping the tabs, pull the barrier and impeller
assembly from the pump. Remove the impeller assembly
(items 2 and 3) from the barrier.

7. Remove the drive magnet assembly (item 6) using a 5/
32” hex wrench on the two set screws. Metric pumps
have access holes in the motor adapter to loosen set
screws.

CAUTION: Keep the drive magnet and impeller assem-
blies away from metal chips or particles.

EXAMINATION:

1. Check impeller drive bushing (item 3A), thrust ring, ce-
ramic thrust ring and shaft for cracks, chips, scoring or
excess wear. See Figure 5. Replace as required.

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