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NOTE:
Select 1 vent pipe connection
and
I combustion-air
pipe connection.
AIR
AIRCOMBUSTION- _
COMBUSTION-AIR
VENT
_]_
_
_2
72227
UPFLOW
COMBUSTION-
AIR
VENT
"t
HORIZONTAl-LEFT
DISCHARGE
NOTE: Select 1 vent pipe connection
and
1 combustion-air
pipe connection.
V_NT
j_[
VENT
AIR
AIR
AIR
FLOW
DOWNFLOW
COMBUSTION-
AiR
VENT
HORIZONTAL-RIGHT
DISCHARGE
A96188
[NIT
MAY NOT OPERATE
Failu*e to follow this caution may result m intemlittent unit
operation.
Make sure there is adequate clearance (3°in. minhmma) to any
fixed or toose objects in orde* to ensure
an adequate
combustion-air
supply
Fig. 34_Combustion-Air
and Vent Pipe
Connections
HHHH,_,
t:
IIII
CARBON MONOXIDE
POISONING
AND PROPERTY
DAMAGE HAZARD
Failure to fbltow this warning
could result in property
damage, personal ir_juW, or death.
Vent pipes must be airtight and watertight
NOTE:
The mh_imum vent pipe length for these fm'naces is 5 f_
Short pipe lengths (5=8 ft) may discharge water droplets
These
droplets may be undesirable, and a 12=in mininmn_ of_get pipe
section is recommended
to reduce excessive droplets flora exiting
vent pipe outtet. (See Fig 3g.)
NOTE:
Do not count elbows or pipe sections in tem_inations or
within t:umace. See shaded areas in Fig. 40,
FIELD-SUPPLIED
2-IN. DIAMETER ,,--- F ELD-SUPPL ED
PVC 90" ELBOW/
2-IN. DIAMETER
/_"
PVC PIPE
_
_1
t
II
A
I,
_LCOMBUSTION-AIR
DISC
(FACTORY-SUPPLIED IN
LOOSE PARTS BAG)
A96211
Length
of Straight
Pipe Portion
of
Combustion-Air
1Net Pipe Assembly
(In.)
CASBNGWIDTH
A
17-112
8-112+ 112
21
10-1/2 + 1/2
24-112
12 + 1/2
Fig. 38--Combustion-Air
Inlet
Pipe AssemNy
HOUSING
PLUG
INTAKE HOUSING
BURNER
BOX
E_COMBUSTION-
AIR PIPE
A96190
Fig. 36--Air
Intake Housing
Plug Fitting
Drain
NOT IN
HORIZONTAL
SECTION
• FURNACE
•
£j_
TRANSITION iN
VERTICAL SECTION
A93034
Fig.
37--Vent
Pipe
Diameter
Transition
Location
and
Elbow
Configuration
33
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