Finish Thompson KC11 Series - Self Priming Option - Manual (Page 3)

11. Plumb the pump into your system. Use only 1-1/2”
rigid piping on the suction side. Important: Suction
piping must be raised approximately 7” (18 cm) above
the center line of the suction inlet on the MagPrime
Chamber (see Figure 2). This ensures proper priming
and pump operation.
12. Install 1-1/4” rigid piping on the discharge of the
MagPrime Chamber. Important: If the MagPrime
Chamber mounting and piping are not extremely rigid,
leakage can occur and possible pump damage.
SECTION 2 - INSTALLATION USING NEW KC11 AND
CUSTOMER SUPPLIED MOTOR
1. Install the KC11 pump (not MagPrime Chamber) in
accordance with “KC11 Series Installation and Main-
tenance Instructions: Assembly Section - steps 1 - 7.”
2. Follow installation steps 2 - 12 from Section 1 of this
manual.
SECTION 3 - INSTALLATION USING NEW KC11
WITH FACTORY SUPPLIED MOTOR
Follow installation steps 2 - 12 from Section 1 of this
manual.
OPERATION
Remove the fill port plug (located on the top of the
MagPrime Chamber). Use approximately 3 quarts (3 li-
ters) of the liquid being pumped to fill the MagPrime
Chamber to capacity. Replace the fill port plug.
CAUTION: Do not allow MagPrime Chamber to overflow.
Start the pump. Check all pump components and piping
for leaks.
NOTE: It is critical that the suction piping is air tight. Any
leaks, no matter how small, will prevent the pump from
priming properly.
TROUBLESHOOTING
If pump does not prime and begin to pump within three
minutes (specific gravity of 1.0 - higher specific gravities
require longer prime times), verify the following:
• No air leaks in suction plumbing.
• Priming chamber filled to proper level.
• The liquid’s specific gravity is not greater than 1.4.
• The impeller is a 4” or 4-1/2” version.
• The motor is at least 2900 rpm and rotating in the
proper direction.
For further troubleshooting, consult the factory.
MAINTENANCE
DISASSEMBLY
1. Drain MagPrime Chamber into an appropriate con-
tainer. Remove the 1/2” pipe plug from front of
MagPrime Chamber. Reinstall plug after draining.
2. Remove the piping from the suction and discharge
on the MagPrime Chamber.
3. Remove the (5) 1/4-20 x 1- 3/4” bolts from the Mag-
Prime Chamber.
4. Remove the MagPrime Chamber.
CAUTION: Some fluid may leak out when the
chamber is removed.
5. Reinstall the KC11 housing (saved from step 4 in
Section 1 of this manual). Using (4) Phillips pan
head screws, secure the housing to the barrier.
NOTE: Reinstalling the housing allows the impeller
and barrier to be easily and safely removed from the
motor adapter.
6. Remove the impeller and barrier in accordance with
“KC11 Series Installation and Maintenance Instruc-
tions: Maintenance Section - Disassembly,” step 4.
7. Follow the steps outlined in the “KC11 Series Installa-
tion and Maintenance Instructions: Maintenance
Section - Examination” to check for worn parts.
Replace parts as necessary.
8. Reassemble following the steps outlined in the “KC11
Series Installation and Maintenance Instructions:
Maintenance Section - Reassembly,” steps 1 - 4.
9. Install wet end following steps outlined in the “KC11
Series Installation and Maintenance Instructions:
Assembly Section,” step 6.
10. Reinstall the MagPrime Chamber following installa-
tion steps 2 - 12 from Section 1 of this manual.
Figure 2 Figure 2 Figure 2 Figure 2 Figure 2
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