CHAMPION USN10 - Manual (Page 53)

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PART 5: BASIC SERVICE
5.3 Component Repair and Replacement
Part 5.3 contains instructions for the adjustment, repair, and replacement of components which may
require service due to normal wear and tear. The following procedures should only be performed by
qualified service personnel.
THE FOLLOWING CAUTION AND WARNINGS MUST BE FOLLOWED AT ALL TIMES
CAUTION:
Only qualified service personnel should perform adjustments and repairs to the dishwasher.
WARNING:
When repairing a circuit, disconnect the power at the main service disconnect switch and
place a tag at the disconnect switch to indicate that work is being performed on the circuit.
WARNING:
Use Extreme Caution when performing tests on energized circuits.
5.3.1 Pressure Reducing Valve, (PRV), Adjustment
The PRV is located on the 3/4" incoming water supply before the final rinse booster assembly. To adjust
the pressure setting on the PRV, loosen the locknut on the adjusting screw in the top of the PRV. Turn the
adjusting screw clockwise to increase the pressure setting. Turn the screw counterclockwise to decrease
the pressure setting. The USN-10 dishwasher requires a flowing pressure of 20-22 PSI during the final
rinse. With the dishwasher in normal operation, place a dishrack in the machine. While final rinse water
is flowing, monitor the final rinse pressure gauge located at the top of
final rinse piping assembly. Adjust the PRV screw to achieve a flowing
pressure of 20-22 PSI.
The PRV does not contain any service replacement parts. If adjustment
will not provide the proper flowing pressure, then replace the PRV. To
replace the PRV: Turn main water supply to the dishwasher off. Place a
rack in the dishwasher to activate the final rinse. This will bleed any
water pressure out of the line. Remove the PRV from the piping system
Reinstall using pipe sealing compound. Turn the water supply on, test
for leaks, and perform the adjustment described above.
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