NTI INSTALLATION MANUALS

Part 14 - Maintenance

5. Remove the gas diaphragm. 6. Remove the electrical connection of the electrode. 7. Remove the electrical connection to the igniter. 8. Loosen the four screws and remove the burner unit.

13.After all maintenance is complete, reinstall the combustion assembly. Ensure all gaskets are installed and all components are tightened properly. 14.Restore power and gas to the boiler. Restart the boiler. Check for leaks in the combustion system. Observe operation for 5 to 10 minutes. If boiler is operating properly, condensate is owing normally, and no gas leaks are detected, combustion coil cleaning is complete. Checking the Burner While the combustion assembly is removed from the heat exchanger, inspect the burner. Proceed as follows: 1. Unscrew the four screws securing the two electrodes to the burner plate.

Figure 105 - Remove the Combustion Assembly 1

9. Pull the assembly towards you.

Figure 107 - Remove the Electrodes

2. Remove the ceramic ber. 3. Remove the four screws and pull the burner toward you. NOTE: Whenever replacing the burner, ALWAYS replace the burner gasket.

Figure 106 - Remove the Combustion Assembly 2

10.Check the back wall insulation and replace if necessary.

WARNING

11.Disconnect the condensate hose and siphon cap from the boiler. 12.Clean the combustion chamber by spraying water or solution into the combustion assembly and monitor the ow through the combustion system. Liquid should ow freely through each tube. If there is an obstruction, increase the ow on the tube to force blockage out. Protect the back wall insulation from water before performing any cleaning. Failure to do so could result in damage to the insulation, improper boiler operation, personal injury, or death.

WARNING

Do not use solvents to clean any of the boiler components. The components could be damaged, resulting in unreliable or unsafe boiler operation, substantial property damage, severe personal injury, or death.

Figure 108 - Disassembled Burner Assembly

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