International comfort products N8MXL Installation Instructions Manual page 27

CAUTION
!
BURN HAZARD
Failure to follow this caution may cause personal
injury.
Hot vent pipe is within reach of small children when
installed in downflow position. See the following
instruction.
An accessory Vent Guard Kit is REQUIRED for downflow
applications where the vent exits through the lower portion of
the furnace casing. See Figure 32. Refer to the Vent Guard
Kit Instructions for complete details.
Caution!! For the following applications, use the minimum vertical vent heights as specified below. For all other
FURNACE
ORIENTATION
Downflow Vent elbow left, then up Figure 32
Vent elbow right, then up
Horizontal Left
Figure 35
Horizontal Left Vent elbow right Figure 36
NOTE: All vent configurations must also meet National Fuel Gas Code venting requirements NFGC
*4 in. (102 mm) inside casing or vent guard
**Including 4 in. (102 mm) vent section(s)
Figure 28 − Upflow Application−Vent Elbow Up
SEE NOTES: 1,2,4,7,8,9
on the page following
these figures
441 01 1421 01
applications, follow exclusively the National Fuel Gas Code.
VENT ORIENTATION
A03208
Specifications are subject to change without notice.
The horizontal portion of the venting system shall slope
upwards not less than 1/4−in. per linear ft. (21 mm/M) from
the furnace to the vent and shall be rigidly supported every 5
ft. (2 M) or less with metal hangers or straps to ensure there
is no movement after installation.
SIDEWALL VENTING
This furnace is not approved for direct sidewall horizontal
venting.
Per section 12.4.3 of the NFPA 54/ANSI Z223.1−2012, any
listed mechanical venter may be used, when approved by the
authority having jurisdiction.
Select the listed mechanical venter to match the Btuh input of
the furnace being vented. Follow all manufacturer's
installation requirements for venting and termination included
with the listed mechanical venter.
MIN. VENT
FURNACE INPUT
DIAMETER
(BTUH/HR)
IN (MM)*
132,000
132,000
132,000
Figure 29 − Upflow Application−Vent Elbow Right
SEE NOTES: 1,2,3,4,7,8,9
on the pages following
these figures
MIN. VERTICAL VENT
HEIGHT
FT. (M)**
5 (127 ) 12 (4)
5 (127 ) 7 (2)
5 (127 ) 7 (2)
A03209
27