REPLACING THE THERMOCOUPLE AND GAS CONTROL VALVE/THERMOSTAT
Removing the Manifold/Burner Assembly
1.Turn off the gas supply to the water heater at the manual gas
2.On the lower front of the water heater locate the gas control valve/thermostat. Before performing any maintenance, it is important to turn the temperature dial on the gas control valve/thermostat to its lowest setting.
3.On top of the gas control valve/thermostat turn the gas control knob to the “OFF” position. NOTE: On the
WHITE RODGERS GAS VALVE | ROBERTSHAW GAS VALVE | |
PILOT | PILOT | |
TUBE | TUBE | |
THERMOCOUPLE | THERMOCOUPLE | |
MANIFOLD TUBE | ||
MANIFOLD TUBE |
Figure 22
4.Remove the outer door.
5.Remove the two screws securing the manifold door assembly to the combustion chamber.
GAS CONTROL VALVE/
THERMOSTAT
| PIEZO | |
| IGNITER | |
MANIFOLD | BUTTON | |
| ||
TUBE | PILOT | |
THERMOCOUPLE | TUBE | |
| ||
| TCO | |
VIEW PORT | SWITCH | |
| MANIFOLD | |
| DOOR | |
MANIFOLD | TWO PIECE | |
SCREWS (2) | ||
WIRE CONNECTOR | ||
|
Figure 23
6.Disconnect the thermocouple
7.Grasp the manifold tube and push down slightly to free the manifold, pilot tube, and thermocouple.
8.Carefully remove the manifold/burner assembly from the burner compartment. NOTE: Be sure not to damage internal parts.
Removing the Burner from the Manifold/ Burner Assembly
Natural Gas (Low Nox) & L.P. Gas Burner
1.Take off the burner by removing the two (2) screws located underneath the burner.
2.Check the burner to see if it is dirty or clogged. The burner may be cleaned with soap and hot water.
PILOT ASSEMBLY
(BOTTOM VIEW)
SCREWS
BURNER
(BOTTOM VIEW)
Figure 24
Replacing the Thermocouple
1.Remove the manifold/burner assembly as directed previously.
2.Lift the retainer clip straight up from the back of the two piece wire connector (using a
3.Remove the burner, see Removing the Burner from the Manifold/Burner Assembly.
4.Pull the thermocouple from the pilot assembly.
IMPORTANT: Be careful not to bend or alter the position of the pilot assembly components.
5.Insert the thermocouple tip into the holes provided in the pilot bracket until it clicks into place. NOTE: The base of the thermocouple must be flush with the base of the pilot bracket.
6.Position the new thermocouple through the bottom opening of the two piece wire connector. Be sure igniter wire is positioned through the middle opening of the two piece wire connector.
7.
8.See Replacing the Manifold/Burner Assembly.
21