Inspect/Prepare Installation Site
Inspect Chimney or Direct Vent System
!WARNING Fire, Smoke & Asphyxia-
tion Hazard
yCarefully inspect the chimney or exhaust vent system.
yMake sure it is properly sized and in good work- ing condition.
yFollow the instructions supplied by the appliance manufacturer.
yThe installation must strictly comply with all ap- plicable codes, authorities having jurisdiction and the latest revision of the National Fire Protection Association Standard NFPA 31 for the installa- tion of chimneys and vent sizing, (or
yRegulation by these authorities take precedence over the general instructions provided in this in- stallation manual.
1.Starting with minimum gph firing rate, the mini- mum size recommended is 6” flue pipe with 8” X 8” inside chimney, unless specified otherwise by the appliance manufacturer.
2.A chimney flue shall extend at least 3 feet above the highest point at which the chimney comes in contact with the roof, and not less than 2 feet above the highest roof surface or structure within 10 feet horizontally of the chimney. Refer to Fig- ure 2.
3.Any accumulation of soot or debris in chimney offsets should be removed
4.Any obstructions such as a protruding joint or a piece of broken tile wedged in the chimney should be removed.
5.No other appliance connection should be made to the same flue pipe.
6.The flue pipe should have an upward pitch toward the chimney of at least 1/4” per foot of length. It should fit tightly and should not project into the chimney.
7.Any leakage between tiles, around
INSULATED STAINLESS STEEL CHIMNEY LINERS
The new designs of high efficiency oil furnaces and boilers in conjunction with flame retention oil burners are more efficient. One result of increased efficiency is lower flue gas temperatures. As
flue gases rise in the chimney, they will cool and condense when they reach the dew point. The condensation will mix with the sulphur in the flue gases creating sulphuric acid. The acid will attack the chimney mortar, brick and clay liners caus- ing corrosion, deterioration and blockage of the chimney. Eventually the blockage could prevent exhausting the flue gases. Instead, the flue gases could vent out the barometric damper into the liv- ing space.
Therefore, it is strongly recommended that an ap- proved insulated stainless steel liner be installed.
yFor those installations not requiring a chimney, such as
Figure 2 – Chimney Design - Above the Roof
NOTE: Correct chimney design is shown by dotted lines. Incorrect chimney design, as shown by the solid lines, may result in down- drafts.
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