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MOST COMMON INSTALLATION CONFIGURATIONS (MORE OPTIONS AVAILABLE
Furnace is multi-position and may be installed in any of the configurations shown.
Inducer blower may be rotated 90° either way to vent through casing side, as shown below.
These are Category I units and the vent system must be installed in accordance with latest
edition of the National Fuel Gas Code, Z223.1/NFPA 54, or in Canada, CSA B149.1.
These furnaces should be vented
only
vent connectors are allowed. This furnace
These are modulating furnaces which vary the gas input between 50% and 100% of full rate.
To make it easier to check that the furnace is not overfired or underfired, put the furnace in
TEST MODE and clock the gas meter. See Installation Booklet for details of TEST MODE.
Optional - Vent blower may also
be rotated 90° left or right to
vent through casing side.
Combustion
Air Entry
Junction Box
(May be
moved to
other side)
Bottom blockoff
plate - Remove
AIRFLOW
for bottom
return applications
UPFLOW
with type B vent pipe. No single - wall vent pipe or
should not
be vented into a masonry chimney.
Vent blower must be
For downflow
rotated 90° left or
applications, the gas
right to vent through
valve must be rotated
casing side.
upwards as shown
DOWNFLOW
Must be installed on combustible floor base or
coil cabinet to prevent blockage of combustible air openings
WITH INDUCER ROTATION,
AIRFLOW
WHICH IS COVERED IN THE INSTALLATION MANUAL)
HORIZONTAL LEFT
Vent blower may also
be rotated 90° left or
right to vent through
casing top.
HORIZONTAL RIGHT
AIRFLOW
AIRFLOW
Vent blower may also
be rotated 90° left or
right to vent through
casing top.
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