Form I-XE/CRGB/RPB, Mfg No. 131782 Rev 4, Page 13
Optional Vertical Flue Discharge (Option CC3)
These power vented furnaces are certified with four feet (1.2M) of
vertical pipe attached as shown in
FIGURES 11A and 11B
. The dis-
tance is measured from the top of the unit to the bottom of the vent cap.
The option package includes the 5" vent cap, the adapter assembly and
the seal plate. The vent pipe and supports are field supplied.
The
straight pipe connecting the furnace to the 90° elbow must be at
least 18" (457mm) in length
.
Optional vertical vent piping provides compliance with local codes
that require either 10-ft (3M) horizontal or 4-ft (1.2M) vertical clear-
ance between the flue outlet and fresh air intake of the heating system
and/or the building.
FIGURE 9C - Optional Stack Extension applies only to
Furnaces with Suffix "Z" in their Model No.
Gravity Vent Cap
4 ft
(1.2M)
Three guy wires, spaced 120°
apart, fastened to the vent
cap collar and furnace top
with sheetmetal screws.
8C. Venting - Power Vented, Outdoor Models
Locate power-vented furnaces so that flue discharge is not directed at
fresh air inlets.
Flue Gas and
Combustion Air
Openings
These screened openings are lo-
cated on the side of the furnace
just above the control access
panel. See
FIGURE 10
. The po-
sition of these openings discour-
ages recirculation of combustion
products and provides for fur-
nace operation in all normal
weather conditions.
Flue Products
Outlet
Combustion
Air Inlet
FIGURE 11A - Installation of Adapter for Optional Vertical
Flue Discharge (Option CC3, P/N 45021)
5 Vent Cap,
P/N 110052
5 dia Flue Pipe
4
(1.2M)
5 dia
90° Elbow
18 (457mm) Straight Pipe
Oval Adapter Assy
Combustion Air Intake
Support angles for flue pipe.
Recommended size is
1/2x1/2, 20 gauge
FIGURE 11B - Installation of the Vent Cap (included in the
option package) and the field-supplied Piping and Supports
Oval Adapter Assy,
PN/ 103025
Venter Seal Plate,
P/N 43446
9. Condensate Drain
9A. Indoor Models XE/HXE
Condensate can form in the heat exchanger of furnaces installed as makeup
air units or when installed downstream from a cooling coil. Under these
conditions, a drain flange, Option CS1, may be installed on the furnace
bottom as shown in
FIGURE 12
. When using Option CS1, seal all
corners and the four square holes in the bottom pan edge.
9B. Outdoor Model Series CRGB and RPB
A hole is provided in all four corners of the furnace bottom to drain off
condensation to the outside of the curb cap to the roof.
FIGURE 12 - Condensate Drain, Option CS1 (P/N 31765)
Bottom of the Furnace Casing
#10 x 1-1/4 Bolt and Nut
3/4 Pipe Waste Nut
Gasket
Seal holes in bottom pan. Terminate drain outside of
building. Periodic cleaning of the condensate collector and
disposal system is required.
1) Remove and discard
the louvered
discharge grill.
2) Using venter seal
plate as a template,
drill holes. Attach
venter seal plate and
oval adapter
assembly with 3/8"-
10 sheetmetal
screws.
FIGURE 10 - Flue Outlet,
Power-Vented Furnaces
10. Duct Connections
Requirements and Suggestions for Connecting
and Installing Ducts
•
Type of Ductwork
- The type of duct installation to be used de-
pends in part on the type of construction of the roof (whether wood
joist, steelbar joist, steel truss, pre-cast concrete) and the ceiling
(whether hung, flush, etc.).
•
Ductwork Material
- Rectangular duct should be constructed of
not lighter than No. 26 U.S. gauge galvanized iron or No. 24 B & S
gauge aluminum.
•
Ductwork Structure -
All duct sections 24 inches or wider, and
over 48 inches in length, should be cross broken on top and bottom
and should have standing seams or angle-iron braces. Joints should
be S and drive strip, or locked.
