International comfort products N9MSE Series Installation Instructions Manual page 41

INSTALLATION INSTRUCTIONS
Figure 47 Combustion Air and Vent Pipe Termination for Direct Vent (2−Pipe) System
Vertical separation between
combustion air and vent
8 ¾ in. (222mm) for 3 in.(76mm)
6 ¾ in. (172mm) for 2in. (51mm)
Maintain 12 in. (305mm)
min. Clearance above
highest anticipated snow
level maximum of 24 in.
(614mm) above roof
Figure 48 Vent Pipe Termination for Non−Direct Vent and Ventilated Combustion Air System
440 01 4103 03
Roof Termination (Preferred)
At least 36 in.
(914mm)
A
18 in. Maximum
(457mm)
Abandoned masonry used
as raceway (per code)
Concentric Vent and Combustion Air
Side Termination
12 in. Min from
overhang or
roof (Typ.)
90 0
12 in. (305mm) separation
A
between bottom of com−
bustion air and bottom of
At least 36 in. vent (Typ.)
(914mm)
Maintain 12 in. (305mm) min.
Clearance above highest an−
ticipated snow level or grade
whichever is greater (Typ.)
Roof Termination (Preferred)
Maintain 12 in (305mm) .
minimum clearance
above highest anticipated
snow level maximum of
24 in. (610mm) above roof .
Abandoned masonry
used as raceway
(per code)
12 in. (305 mm) min. from
overhang or roof
90°
Side wall termination
with 2 elbows (preferred)
Specifications subject to change without notice.
Note:
"A" denotes 0 To 2 in. (51mm)
Between the first 2 vents Third
vent (and fourth vent, if used)
must be 36 in. Away (914mm)
A
At least 36 in.
(914mm)
Concentric Vent and Combustion Air
Roof Termination (preferred)
A
Note:
At least 36 in.
"A" denotes 0 To 2 in. (51mm)
(914mm)
Between the first 2 vents Third
vent (and fourth vent, if used) must
be 36 in. Away (914mm)
Vent
12 in. min. (305 mm)from
6 in. (152mm) minimum clearance
between wall and end of vent pipe.
10 in. (254mm) maximum pipe lengt h
Maintain 12 in. (305mm)
minimum clearance
above highest anticipated
snow level or grade
whichever is greater.
Gas Furnace: N9MSE
Note:
36−in. separation between
pairs of inlets only required
for direct−vent systems
Maintain 12 in. (305mm) min. Clearance
above highest anticipated snow level
maximum of 24 in. (614mm) above roof
1 in. (25mm) maximum
(Typ.) from wall to inlet
12 in. From Overhang
or roof (Typ.)
A
Maintain 12 in. (305mm) min. Clear−
ance above highest anticipated snow
At least 36 in.
level or grade whichever is greater
(914mm)
(Typ.)
Side wall termination of
less than 12 in. (305mm)
above highest snow level
L12F044
overhang or roof
Maintain 12 in. (305mm)
minimum clearance
above highest anticipated
snow level or grade
whichever is greater
Sidewall Termination
with Straight Pipe (preferred)
A05091
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