A.O. Smith 120 through 250 Series User Manual
Page 40
Conversion to a different gas category
40
Instruction manual BFC
4
is
1. Isolate the water heater from the power supply
.
2. Shut off the gas supply.
3. Undo the screws of the plastic covers.
4. Carefully remove the covers from the top of the appliance.
5. Detach the connector (1) that connects the leads of the hot surface igniter
and the flame probe to the controller.
6. Detach the three-part gas coupling (2) adjacent to the burner.
-
Detach the air supply hose (3).
-
Detach the pressure switch hose (4).
7. Remove the burner as complete assembly.
8. Place and fit the burner with parts from the conversion kit.
Note
The burner for LP gases can be recognised by the letter 'P' which is stamped
into the metal of the gas/air distribution plate (5).
9. Select and fit the correct orifice from the conversion kit, based on the gas
table
. The injector diameter is stamped into each injector
(6).
Conversion of gas control
Legend
7. burner pressure regulator
8. blank plate
9. gas control connector
7
8
9
IMD-0079b R2