507335-02
Page 14 of 39
Issue 2001
Figure 21. Horizontal Right Position
Top Vent Discharge
•
Remove make-up box assembly (2 screws) and cut wire tie to
free make-up box wires. Reinstall make-up box on other side of
cabinet.
•
Resecure make-up box wires: Either pull excess wires through
the blower compartment and secure using supplied wire tie, or
coil excess wire and secure to the gas manifold.
Figure 22. Horizontal Right Position
Side Vent Discharge
These series units are classified as fan assisted Category
I furnaces when vertically vented according to the latest
edition of National Fuel Gas Code (NFPA 54 / ANSI
Z223.1) in the USA. A fan assisted Category I furnace is
an appliance equipped with an integral mechanical means
to either draw or force combustion products through the
combustion chamber and/or heat exchanger. This unit is
not approved for use with horizontal venting.
NOTE:
Use these instructions as a guide. They do not
supersede local codes. This furnace must be vented
according to all local codes, these installation instructions,
and the provided venting tables in these instructions.
The venting tables in this manual were extracted from the
National Fuel Gas Code (NFPA 54 / ANSI Z223.1) and are
provided as a guide for proper vent installation. Proper
application, termination, construction and location of vents
must conform to local codes having jurisdiction. In the
absence of local codes, the NFGC serves as the defining
document.
Refer to the tables and the venting information contained
in these instructions to properly size and install the venting
system.
Once the venting system is installed, attach the
“Disconnected Vent” warning sticker to a visible area
of the plenum near the vent pipe. See Figure 23. The
warning sticker is provided in the bag assembly. Order
kit 66W04 for additional stickers.
IMPORTANT
Asphyxiation hazard. The exhaust vent for this furnace
must be securely connected to the furnace flue transition
at all times.
WARNING
Figure 23. Vent Connection
Use self drilling sheet metal screws or a mechanical
fastener to firmly secure the vent pipe to the round collar of
the flue transition. If self drilling screws are used to attach
the vent pipe, it is recommended that three be used. Drive
one self drilling screw through the front and one through
each side of the vent pipe and collar. See Figure 23.
Install the first vent connector elbow at a minimum of six
inches (152 mm) from the furnace vent outlet. See Figure
Venting Using a Masonry Chimney
The following additional requirements apply when a lined
masonry chimney is used to vent this furnace.
