Finish Thompson DB6, 6H, 7, 8, 9, 10 Series - Manual (Page 10)

7
5. Install o-ring (item 3) in groove in the
barrier.
6. Install impeller shaft (item 6) into
barrier by aligning the flats on the
shaft with the flats in the barrier.
Make sure it is completely seated.
See figure 28.
7. Carefully install the impeller/inner drive
assembly (items 4A, 4, 5, 5A) by sliding
it over the impeller shaft in the barrier. It
is normal for the impeller/inner drive to
pop up a slight amount due to magnetic
forces. See figures 29 and 30.
8. Establish the bottom of the motor
adapter/clamp ring assembly. See
figures 25 and 26.
9. Install the impeller housing making
sure that the discharge is in correct orien-
tation (vertical or horizontal). Align the
shaft in the barrier with the front shaft
support in the impeller housing. Pressing
down, push the impeller/inner drive
magnet assembly into position. Holding
the impeller housing with one hand, install
and finger-tighten two bolts, lock washers
and flat washers (items 15, 16, 17) in
opposite locations. See figure 31.
10. Install the remaining bolts, lock washers
and flat washers finger tight.
11. Tighten all the bolts evenly using a star
pattern. Tighten to 60 inch-lbs (6.8 N-m).
12. Reinstall the pump on the motor/drive magnet following instruc-
tions found in “Assembly, Pumps without motors,” steps 7-10.
Figure 28
Figure 29
Figure 30
Figure 31
Section VII - Troubleshooting
General Notes:
• Do not pump liquids containing ferrous metal fines.
• If magnets decouple, stop pump immediately. Operating the pump
with the magnets decoupled will eventually weaken the magnets.
• Do not use mismatched drive magnet assemblies (different num-
ber of magnets on inner and outer drive magnet assemblies).
• Contact our Technical Service Department at 1-800-888-3743 or
by e-mail at [email protected] if you have any
questions regarding product operation or repair.
No or Insufficient Discharge
• Air leaks in suction piping
• Pump not primed
• System head higher than anticipated
• Closed valve
• Viscosity or specific gravity too high
• Motor too large for magnet coupling rating (magnets uncoupled)
• Suction lift too high or insufficient NPSH
• Clogged suction line or impeller vanes
• Motor rotation incorrect (correct rotation when viewed from the
fan end is clockwise)
Insufficient Pressure
• Air or gas in liquid
• Impeller diameter too small
• System head lower than anticipated
• Motors speed insufficient (too low) or motor rotation incorrect (cor-
rect rotation when viewed from the fan end is clockwise)
Loss of Prime
• Leak in suction piping
• Foot valve or suction opening not submerged enough
• Foot valve too small or leaking
• Air or gas in liquid
• Foreign matter in impeller
• Leaking valve. Suction lift too high or insufficient NPSHa.
Excessive Power Consumption
• Head lower than rating
• Excessive flow
• Specific gravity or viscosity too high.
Vibration/Noise
• Loose magnet
• Drive magnet rubbing
• Pump cavitating from improper suction or feed
• Motor or piping not properly secured
• Foreign object in impeller
Section VIII - Warranty
Finish Thompson, Inc (manufacturer) warrants this pump product to be
free of defects in materials and workmanship for a period of five years
from date of purchase by original purchaser. If a warranted defect,
which is determined by manufacturer’s inspection, occurs within this
period, it will be repaired or replaced at the manufacturer’s option, pro-
vided (1) the product is submitted with proof of purchase date and (2)
transportation charges are prepaid to the manufacturer. Liability under
this warranty is expressly limited to repairing or replacing the product
or parts thereof and is in lieu of any other warranties, either expressed
or implied. This warranty does not apply to normal wear of the product
or components. This warranty does not apply to products or parts
broken due to, in whole or in part, accident, overload, abuse, chemical
attack, tampering, or alteration. The warranty does not apply to any
other equipment used or purchased in combination with this product.
The manufacturer accepts no responsibility for product damage or
personal injuries sustained when the product is modified in any way. If
this warranty does not apply, the purchaser shall bear all cost for labor,
material and transportation.
Manufacturer shall not be liable for incidental or consequential dam-
ages including, but not limited to, process down time, transportation
costs, costs associated with replacement or substitution products, la-
bor costs, product installation or removal costs, or loss of profit. In any
and all events, manufacturer’s liability shall not exceed the purchase
price of the product and/or accessories.
Ordering Spare Parts
Spare parts can be ordered from your local distributor. Always refer to
the pump model to avoid error.
Other FTI Products
See our full product range at www.finishthompson.com.