AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 113)

GF-135 Esteem 399 Low NOx Boiler
Chapter 17
OMM-0089_0A Installation, Operation & Maintenance Manual Maint. Procedures
17.16 BURNER FLAME INSPECTION AND TROUBLESHOOTING
Inspect the burner flame through the observation port on the heat exchanger. If flame pattern is
not fully blue and covers the entire burner surface during high fire, perform the following
troubleshooting procedures.
Burner Flame Troubleshooting
1. Shut the unit down and allow it to cool thoroughly before disassembly.
2. Close the external manual gas valve on the gas supply line and disconnect the gas piping
and gas valve wire harness connector.
3. Disconnect the wiring harness connectors from the blower and remove the blower retaining
screws or nuts. Remove the blower from the unit.
4. Remove the mounting nuts securing the burner mounting plate to the heat exchanger and set
aside.
5. Carefully remove the burner mounting plate assembly from the heat exchanger. Ensure
combustion chamber insulation is not damaged during removal of burner mounting plate
assembly. See warning in Section 17.22.
6. Remove the burner head mounting screws and remove the burner head. Inspect the burner
head for deterioration. Use compressed air or a vacuum to clean the burner head.
7. Remove the Venturi and gas valve assembly from the blower.
8. Use a vacuum cleaner or compressed air to clean the interior of the blower assembly. Inspect
the blower blades to ensure they are clean and not damaged.
9. Re-assemble the Venturi and gas valve onto the blower. Ensure the Venturi gasket is in
good condition, positioned correctly and replace gasket if necessary.
10. Re-assemble the burner head onto the burner mounting plate. Ensure the burner head
gasket is in good condition, positioned correctly and replace gasket if necessary.
11. Re-assemble the burner mounting plate assembly onto the heat exchanger. Ensure the
burner plate gasket and combustion chamber insulation is in place and not damaged, replace
gasket and insulation if necessary. See warning in Section 17.22.
12. Re-assemble the blower onto the burner mounting plate and reconnect the wiring harness
connectors.
13. Re-assemble the gas supply connection and wire harness to gas valve. Open the external
manual gas valve. Check gas piping for any leaks as outlined in Section 11.4 and Section
12.3.3 and repair if necessary. Place the unit back into service.
Page 113 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288