Combustion Blower And Burner Removal/ Installation Instructions - State Water Heaters 60120-100250 Service Handbook

COMBUSTION BLOWER AND BURNER REMOVAL/ INSTALLATION
INSTRUCTIONS
Refer to the Combustion Blower & Burner Assembly, Heater Top View images in this Service Handbook and
the Instruction Manual supplied with the heater for heater component locations.
COMBUSTION BLOWER/ BURNER REMOVAL
1. Turn the water heater's Enable/Disable switch to the "Disable" Position.
2. Turn off the electrical circuit breaker that serves the water heater.
3. Close the Main Gas Shut Off Valve serving the water heater.
4. Disconnect the supply gas line to the water heater on the heater side of the Main Gas Shut Off Valve.
5. If the water heater has been installed in a Direct Vent configuration, disconnect the Blocked Air Intake
Switch sensing tube (light blue soft tubing) from the Air Intake Pipe Assembly and disconnect the intake
air pipe at the intake air connection on the water heater by loosening the hose clamp closest to the
Venturi and remove the Intake Air Assembly.
6. If the water heater has been installed in a Non-Direct Vent configuration, disconnect the Blocked Air
Intake Switch sensing tube (light blue soft tubing) from the Air Intake Pipe Assembly and disconnect the
intake air pipe at the intake air connection on the water heater by loosening the hose clamp closest to the
Venturi and remove the Intake Air Assembly.
7. Unplug the ignition cable from the spark igniter and the yellow wire from the Flame Sensor.
8. SUF 60120 - 100250 Models: Disconnect the 3-Pin and 5-Pin plugs from the Combustion Blower
Assembly. SUF 119300 - SUF 119500 Models: Disconnect the blower power wires at the three spade
connectors connecting the blower to the VFD and unplug the blower speed feedback connector from the
wiring harness.
9. Disconnect the 24 Volt power wires to the Gas Control Valve at the two spade connectors in the wiring
harness to the valve.
10. Disconnect the Blower Prover Switch sensing tube (light blue soft tubing) from the Combustion Blower
outlet sensing port.
11. Using a socket wrench with a ½" deep well socket remove the four (SUF 60120), six (SUF 100150 -
100250), or eight (SUF 119300 - 119500) ½" nuts from the studs holding the burner plate in place.
12. Slide the three burner ground wire eyelet connectors up and off of the studs.
Note: These ground wires must be reinstalled when reinstalling the Burner Assembly.
13. Ensure there are not any loose parts, tools, screws, or objects of any kind on top of the water heater
before removing the Burner Assembly as these objects could fall into the heat exchanger.
14. Carefully lift the Burner Assembly straight up and out of the heater exchanger opening.
15. Refer to the Flame Sensor and Spark Igniter sections of this Service Handbook for their servicing
specifications.
COMBUSTION BLOWER/ BURNER INSTALLATION
1. Install new white fiber Burner Plate (All Models) and Flue Ring (SUF 60120 - 100250 Models) before re-
installing the Blower/Burner Assembly.
2. To re-install the Burner Assembly follow the steps for removal in reverse order.
3. Do not overtighten the ½" nuts.
4. Connect the supply gas line to the water heater on the heater side of the Main Gas Shut Off Valve.
5. Slowly open the Main Gas Shut Off Valve serving the water heater.
6. Turn on the electrical circuit breaker that serves the water heater.
7. Turn the water heater's Enable/Disable switch to the "Enable" Position.
8. Operate heater through at least one complete heating cycle to verify it is operating properly.
Servicing should only be performed by a Qualified Service Technician 43