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ICP 9MPD050F12B1 Installation Instructions Manual page 12

90+ single stage category iv furnace fan assisted, direct vent gas furnace

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3.
Insulate
combustion
air inlet piping when run in warm,
hu-
mid spaces
such as basements.
Sizing Combustion Air and Vent Pipe
Consult
Table 3 or Table 4 to select
the proper
diameter
exhaust
and combustion
air piping.
Exhaust
and combustion
air piping is
sized for each furnace
Btuh size based
on total lineal vent length
(on inlet oroutlet
side), and number
of 90 ° elbows
required.
Two
45 ° elbows
can be substituted
for one 90 ° elbow. The elbow
or el-
bows used for vent termination
outside
the structure
ARE counted,
including
elbows
needed
to bring
termination
above
expected
snow levels.
The elbow
inside the furnace
on the *9MPD
IS NOT
included
in the count.
Pipe Diameter Table
N9MP1 & *9MPD Models
50,000,
75,000
& 80,000
Btuh
Furnaces
40' & (5) 90 ° elbows with 2" PVC pipe or
70' & (5) 90 ° elbows with 3" PVC pipe
100,000
Btuh
Furnace
40' & (5) 90 ° elbows with 3" PVC pipe or
70' & (5) 90 ° elbows with 3" PVC pipe &
Long Vent Kit (See Tech. Manual)
125,000
Btuh
Furnace
40' & (5) 90 ° elbows with 3" PVC pipe
Elbows
are DWV Long Radius Type for 2" and 3" vents.
If more
than
five elbows
are required,
reduce
the length
of
both
the inlet and exhaust
pipes
5' for each
additional
elbow
used.
NOTE:
It is allowable
to use larger diameter
pipe and fitting than
shown
in the tables
but not smaller
diameters
than
shown.
Pipe Diameter Table
N9MP2 Models
50,000
& 80,000
Btuh
Furnaces
40' & (5) 90 ° elbows with 2" PVC pipe or
70' & (5) 90 ° elbows with 3" PVC pipe
75,000
Btuh
Furnaces
25' & (3) 90 ° elbows with 2" PVC pipe or
40' & (5) 90 ° elbows with 2" PVC pipe &
Long Vent Kit (See Tech. Manual) or
70' & (5) 90 ° elbows with 3" PVC pipe
100,000
Btuh
Furnace
40' & (5) 90 ° elbows with 3" PVC pipe or
70' & (5) 90 ° elbows with 3" PVC pipe &
Long Vent Kit (See Tech. Manual)
125,000
Btuh
Furnace
40' & (5) 90 ° elbows with 3" PVC pipe
Elbows
are DWV Long Radius Type for 2" and 3" vents.
If more
than
five
elbows
are required,
reduce
the
length
of
both
the inlet and exhaust
pipes
5' for each additional
elbow
used.
For
"Concentric
Termination
Kit" Venting
table, see
"Section
11" in this manual.
Vent Termination Clearances
CARBON
MONOXIDE
POISONING,
FIRE
AND
EXPLOSION HAZARD.
Failure to properly
vent this furnace could result in
death, personal
injury and/or property
damage.
Inlet and outlet pipes may NOT be vented directly
above each other.
1.
Determine termination
locations based on clearances spe-
cified in following steps and as shown in Figure 7, Figure 8,
Figure 20, through Figure 28.
For "Concentric
Termination
Kit"clearances,
see Figure 46,
Figure 47, Figure 48, Figure 49 and Figure 50 in "Section
10"
in this manual.
2.
For Single Pipe Installation, models N9MP1 or *9MPD, refer
to Figure 8 for vent termination clearances.
3.
For Direct Vent Installation, models N9MP2 or*9MPD, refer
to Figure 7 for vent termination clearances.
[_
440 01 1020 04

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