Lanair MXD300 - Manual (Page 46)

Section 13 - Service / Maintenance
QUESTIONS?... Contact Customer Service at 1-888-370-6531 M-F 8:00 am- 4:15 pm CST
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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
combustion chamber area so the target brick is not disturbed. Insufficient or irregular
cleaning intervals will cause inefficiency, random shutdowns, and extreme damage to
the combustion 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 clean out panel on the front left of unit by removing (4) #8 screws 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 port. 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 clean out plate, replacing
the ten (4) #8 sheet metal screws. Check your draft reading to make sure your baro-
metric damper is properly set (See Section 4).
12. Remove roof chimney cap and cleanout tee cap. Using a properly sized chimney brush
sweep ash and soot from roof downward until the chimney is completely clean.
Reinstall chimney and cleanout tee caps.
13. 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.
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
!