Champion usn-72 Guía Del Usuario

Part 5: BASIC SERVICE

Parts Required:
P/N 112357, Gasket (Return header)
P/N 112356, Gasket (Flow header)
Special Tools Required:
Torque wrench (30 ft/lbs needed)

To clean the heater tubes: Turn off all

power, steam, and water supplies to the

booster and dishwasher.

Refer to Fig. 6.16, Part 6, Replacement

Parts.  Note thermostats (item- 10).

Remove the thermostat covers, mark and

disconnect the wires.  Remove the conduit

and fittings.  Mark the location of each thermostat before removal, then unscrew each thermostat

from its piping.  Break the unions (item 12) and remove the piping assemblies from the booster

header. Remove the eight (8) bolts from each header.  Remove the flow and return headers.

Inspect the exposed copper tubes and clean as necessary using the cleaning brush

(Champion P/N 112806).  Clean the headers as required.

Install new header gaskets and reassemble in reverse order.

To torque the header bolts:
Refer to the torque sequence diagram to the right.

Torque each bolt in three steps:

1) handtight

2) 20 ft/lb

3) 30 ft/lb

Retorque each bolt to 30 ft/lb after 24 hours.

8 BOLTS

8

1

5

3

7

2

6

4

Bolts = 3/8-16

SA-449

Type 1

Flow header gasket

P/N 112356

Return header gasket

P/N 112357

Steam Booster