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Flue / Chimney / Vent Connector
c CAUTION:
DO NOT install a manual damper in the chimney or vent connector.
Thermally- activated type vent dampers are NOT recommended for
use on these furnaces.
It is desirable to install the shortest vent connector (also referred to as a flue or
chimney connector) possible with the fewest number of fittings, i.e. transitions
and elbows. Generally, 6-inch diameter, 24 Ga. or heavier, single wall, lock
seam-type, galvanized steel vent pipe and fittings are satisfactory materials for
the fabrication of a vent connector. However, always consult local codes and
authorities for specific minimum requirements.
On a front flue unit the flue can exit through the top, left or right side casing, or
through the front door. Remove the appropriate knock-out in the casing panel for
the chosen venting location.
All horizontal sections of the vent connector must slope upward not less than ¼
inch per foot from the furnace to the vent termination. Long horizontal sections of
the venting system must be supported at least every five (5) feet with metal
straps to prevent sagging of the vent piping. Secure all joints in the vent
connector with sheet metal screws or equivalent fasteners. Vent piping must not
be inserted beyond the inside wall of the chimney flue.
Blocked Vent Switch
The blocked vent switch kit must be installed to comply with CAN STD B140.4
where applicable. Installation instructions are provided with the Blocked Vent kit,
part no. AOPS2686
Draft Regulator
A barometric-type, draft regulator is supplied with the furnace. Installation or
operating conditions that produce excess amounts of draft can reduce the
heating efficiency of the furnace. The purpose of the regulator is to adjust and
control the flow of flue gases from the furnace by stabilizing the amount of
chimney draft to which the furnace is subjected.
Always refer to the draft regulator manufacturer's installation instructions for
application specific recommendations.
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