Champion usn-72 ユーザーガイド

Part 5: BASIC SERVICE

Refer to Fig. 6.12,  B  , Part 6, Replacement Parts, for a detailed drawing of the thermostat

assembly.  Each tank has a control thermostat mounted on its front in a stainless steel enclosure.

The thermostat capillary tubes run to either side of the tank.  The thermostat sensor bulb enters

the tank and is secured inside the tank with a 1/2" locknut.  The thermostats are adjusted by

turning a small adjustment screw mounted on the side of the device.  The thermostats have an

operating range of 110-200

°

F.  Place the machine in normal operation and monitor the associated

tank thermometer.  Wash tank temperature should maintain a minimum of 150

°

F.  Power rinse

tank temperature should maintain a minimum of 160

°

F.

Wash Tank Temperature = 150

°

F minimum

Power Rinse Tank Temperature = 160

°

F minimum

To adjust a thermostat:  Turn the adjusting screw incrementally 1/8 to 1/4 of a turn clockwise.

Monitor the temperature thermometer after each adjustment until the desired temperature setting

is maintained during normal dishwasher operation.

To replace a thermostat:  Drain the tanks and turn off all power to the dishwasher.

Have a helper hold the thermostat sensor bulb from the outside of the machine and remove

the 1/2" locknut from the interior of the tank.  Pull the bulb and  capillary back to the thermostat

junction box.  Note the wire locations and disconnect the thermostat.  Remove two retaining nuts

and remove the thermostat assembly.  Install a new thermostat in reverse order.  Be sure to apply

plumber's putty (Champion P/N 104889) to seal the thermostat bulb fitting in the tank.  Return the

dishwasher to normal operating condition and adjust the thermostat as described above.

Refer to Fig. 6.16, Part 6, Replacement Parts, for a detailed

drawing of the steam booster assembly.  Note Items 10, 17 and

19.  This shows the location of the final rinse control thermostat.

The thermostat has a range of  50-300

°

F.  However, the operat-

ing range for final rinse application is 180-195

°

F.  The normally

open contacts of the thermostat open on temperature rise.

The normally closed contacts close on temperature rise.

The thermostat's N.O. contacts are used for this application.

The final rinse thermostat controls operation of the steam

booster solenoid.  It senses the outlet temperature of the final

rinse water  leaving the booster and energizes or deenergizes the

steam solenoid as needed to maintain the final rinse temperature within 180-195

°

F.

Note Items 10, 17 and 15 in Fig. 6.16.  This shows the location of the low temperature cutoff

thermostat, (TSK).  The final rinse thermostat and the low temperature thermostat are identical.

The TSK has two applications.  It may be used to immediately shut down the dishwasher in the

event the final rinse water temperature falls below 180

°

F., or it may be used to activate a chemi-

cal sanitizing system (supplied by others) which does not immediately shut down the dishwasher.