Lanair MX300 - Manual (Page 46)

6. Use an industrial type canister vacuum cleaner with a high efficiency filter, or suitable
tool. Failure to clean heat exchanger tubes annually will impair draft. Reaching
through the burner opening, vacuum or shovel the ash from the combustion chamber.
Inspect the combustion chamber and target brick. Use care when cleaning the combus-
tion chamber area so the target brick is not disturbed. Insufficient or irregular cleaning
intervals will cause inefficiency, random shutdowns, and extreme damage to the com-
bustion chamber.
7. Before replacing the combustion chamber access doors, replace the white gasket seal on
the door (contact the Lanair Service Department). When replacing the gaskets apply a
light film of gasket adhesive to adhere the new gasket to the door. Lube the threads of
the screws with a high temperature lubricant. Re-install the heat exchanger access panel.
If any nuts are stripped, replace (use brass).
8. Replace the inspection port with the two (2) #8 hex head sheet metal screws (if
removed). Re-install the clean out cover. Replace burner.
9. Remove the front panel of the unit by removing (10) #10” sheet metal screws. Slide the
front panel of the unit to the right side of the heater far enough to expose the manifold
clean out port.
10. On the left side facing the front of the unit remove the (4) #10 sheet metal screws from
the manifold clean out ports. Using an industrial type canister vacuum cleaner with a
high efficiency filter, remove all ash accumulation.
11. The chimney connector can also be removed to allow access to the manifold for clean-
ing. Clean and inspect the chimney connector if necessary. Replace the four (4) #10
screws in the clean out ports on the heater. Replace the front of the cabinet replacing
the ten (10) #10 sheet metal screws. Check your draft reading to make sure your baro-
metric damper is properly set (See Section 4).
12. Reconnect all power at the main breaker box, wait ten minutes before turning the ther-
mostat up. Your heater is now ready for normal operation.
NOTE: When changing the target brick, call the Lanair Service Department for assistance.
Section 13 - Service / Maintenance
42
CAUTION: THE CLEAN OUT PANEL MUST HAVE AN AIR TIGHT SEAL TO
PREVENT EXTREME DAMAGE TO THE COMBUSTION CHAMBER
!
WARNING: DO NOT OPERATE YOUR FURNACE WITH CLEAN OUT PANELS
OR PORTS REMOVED
!
CAUTION: TO AVOID BOLT BREAKAGE, DO NOT OVER-TIGHTEN
!
QUESTIONS?... Contact Customer Service at 1-888-370-6531 M-F 8:00 am- 4:15 pm CST