Central Boiler MaXIM M255 P, Руководство пользователя

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16
Section 5 - Chimney
Chimney Draft
Proper draft is necessary for the Maxim to operate
optimally. Draft occurs when the temperature in the
chimney is high enough and/or the chimney is high
enough to cause a negative pressure that "pulls" the
exhaust up and out the chimney. The higher the burn
rate and fan settings, the more sections of chimney that
will be required to provide proper draft.
NOTE: Adding more chimney sections increases
the amount of negative pressure in the chimney.
NOTE: A qualified installer may perform the
following test to check for proper draft.
1. Drill a hole in the chimney inspection cover; then
with the outdoor furnace and chimney at normal
operating temperature, use a manometer to check
draft. Flue draft should be between -0.02 in. WC (-5
Pa) and -0.05 in. WC (-12.45 Pa). If the flue draft is
lower, add more chimney sections.
2. After the test, fill the hole in the chimney inspection
cover with high-temp silicone.
3. If a spark arrestor is being used, make sure it is clean
and unobstructed.
4. Objects like buildings and trees in close proximity or
nearby terrain (e.g., hills, valleys, etc.) can adversely
affect air flow in the chimney (see Fig. 16). Adding
chimney sections may overcome these factors.
Fig. 16