Lanair MXB360 - Manual (Page 32)

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Section 18 - Service / Maintenance
Flue/Combustion Chamber Cleaning
1. The boiler core must be completely cool to the touch before attempting to clean.
2. Turn off all power to the boiler (120 VAC) at the main disconnect.
3. Turn off air pressure supply
4. Disconnect power line from burner (Quick Disconnect-Heavy yellow cable from service box to burner).
5. Disconnect air line from burner.
6. Remove bolts from the boiler door. Carefully swing the boiler door open.
7. Remove smoke pipe and clean out port covers at rear of the boiler.
8. Using a cleaning brush, scrub all fire side surfaces in combustion chamber, flue passages and flue collector areas.
9. Use an industrial type canister vacuum cleaner with a high efficiency filter to remove any ash from the chamber or
flue passages. Failure to clean flue passages will impair draft.
10. Inspect the combustion chamber and flue passages.
11. Re-connect smoke pipe and reinstall clean out port covers at rear of the boiler. NOTE: Do not over tighten bolts of
the clean-out port covers. Over tightening may crack or break the covers.
12. Check the front door and flue collector rope seals. Replace as required.
13. Re-assemble boiler door and burner connections.
NOTE: ALWAYS WEAR EYE, FACE AND BREATHING PROTECTION AND PROTECTIVE CLOTH-
ING WHEN INSPECTING OR CLEANING CHAMBER.
!
WARNING: DISCONNECT ALL ELECTRICAL POWER TO BOILER BEFORE SERVICING!
!
IMPORTANT: When boiler is to be layed-up at the end of the heating season or out of service for a
prolonged period of time:
A) Make sure all boiler surfaces are clean and dry.
B) Open boiler front door and place a tray of calcium chloride in the center of the furnace. This will absorb
moisture and keep the heat transfer surfaces dry. When calcium chloride becomes mushy, replace with new.
C) Block the door approximately 1/4 open.