Champion usn-72 ユーザーガイド

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 red 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.

WARNING:

The conveyor drive contains moving parts.

Use caution when working around the conveyor drive assembly.

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-72 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.