ANNUAL INSPECTION PROCEDURE
A. Flue product carrying areas of the boiler and the vent system should be thoroughly inspected each
year by an experienced, qualified service agency using the following procedure.
1. The unit must be “shut down” and allowed to cool.
2. Disconnect flue piping (vent system).
3. Remove draft hood, top jacket panel, and flue collector by unfastening the attaching screws.
NOTE: Depending on model, a vertical or a horizontal to vertical draft hood and collector is furnished.
4. Use a flashlight to examine all flue passages for any obstructions. Examine draft hood, flue collector
and vent system for deterioration from corrosion or other sources.
5. Reassemble unit and check for leaks at all joints.
B. A visual check of the pilot flame and main burner flame should be conducted at least once a year. To
observe the flame remove the burner access door (when supplied) and view across the top of the
main burners. NOTE: Access door will be HOT — care must be exercised. Replace door when visual
check is complete.
1. The pilot flame should be medium blue covering approximately 3/8" to 1/2" (10 mm to 13 mm) of
the sensing probe.
2. The main burner flame should have a clearly defined intercone approximately 1-1/2" (38 mm) high
and should have a very sharp blue color characteristic.
3. If either flame is lazy or has a yellow color a qualified service agency should be called.
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Figure 3: Boiler Components
