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TaNe
7--Maximum
AltowaNe
Pipe Length
(ft) (Continued)
ALTITUDE
(FT)
800t to 9000@
ALTITUDE
(FT)
9001 to lO,OOO_
UNiT SBZE
040-08
040-12
060-08
060-12
060-16
080-12
080-16
080-20
100-16
100-20
120-20
140-20
UNIT SIZE
040-08
040-12
060-08
060-12
060-16
080-12
080-16
080-20
100-16
100-20
120-20
140-20
TERMINATION
TYPE
2 Pipe or 2-in
Concentric
2 Pipe or 2-in
Concentric
2 Pipe or 2-in
Concentric
2 Pipe or 3-in
Concentric
2 Pipe or 3-in.
Concentric
TERMiNATiON
TYPE
2 Pipe or 2-in
Concentric
2 Pipe or 2-in
Concentric
2 Pipe or 2-in
Concentric
2 Pipe or 3-in
Concentric
2 Pipe or 3-in.
Concentric
PIPE DIA
NUMBER OF 90 ° ELBOWS
(IN.)*
1
2
3
4
5
6
1-1/2
46
41
36
31
29
24
2
62
60
58
56
55
53
1-1/2
11
6
NA
NA
NA
NA
2
49
44
42
37
35
34
2
33
28
17
12
10
NA
2-1/2
62
60
58
56
55
53
2-1/2
23
15
7
5
NA
NA
3
59
54
49
44
39
34
31- no disk
10
NA
NA
NA
NA
NA
41- no disk
35
30
25
20
15
10
NA
PIPE DIA
NUMBER OF 90 ° ELBOWS
(iN.)*
1
2
3
4
5
6
1-1/2
42
37
32
27
25
20
2
57
55
53
51
49
47
45
40
38
33
31
29
2
30
25
14
9
7
NA
2-1/2
57
55
53
51
49
47
2-1/2
2I
13
5
NA
NA
NA
3
54
49
44
39
34
29
4t no disk
10
5
NA
NA
NA
NA
NA
Disk usage-Unless
otherwise
specNed,
use perforated
disk assembly
(factory-supplied
in loose parts bag) If one disk is stated, separate 2 halves of perforated
disk
assembly
and use shouldered
disk half. When using shouldered
disk half, install screen side toward iNet box.
?Wide radius elbow
SVent sizing for Canadian
installations
over 4500 ft (1370 m) above sea level are subject to acceptance
by the local authorities
having judsdiction.
NA-Not AHowed; pressure switch will not make
NOTES:
1. Do not use pipe size greater than those specified
in table or incomplete
combustion,
flame disturbance,
or flame sense lockout may occur.
2. Size both the combustion-air
and vent pipe independently,
then use the larger diameter
for both pipes
3. Assume two 45 ° elbows
equal one 90 ° etbow Long radius elbows
are desirable
and may be required in some cases
4. Elbows and pipe sections within the furnace casing and at the vent termination
should not be included
in vent length or elbow count.
5. The minimum
pipe length is 5 ft for all applications
6. Use 3-in diameter
vent termination
kit for installations
requiring 4-in diameter
pipe.
COMBUSTION
- AIR
INTAKE
HOUSING
BURNER
BOX
DRILL
TO OPEN
DRAIN
YCOMBUSTION
-
AIR
PiPE
A93035
Fig. 35--Air
Intake Housing
Plug Fitting
Drain
NOTE:
It is recommended
that
all pipes
be cut, prepared_
and
pre-assembled
before
permanently
cementing
any joint
8. ARer pipes have been cut and pre-assembled,
apply
generous
layer of cement
primer
Gopipe fitting
socket
and end of pipe
to insertion
mark.
Quickly
apply
approved
cement
to end of
pipe and fitting socket (over primer).
Apply
cement
in a ligl'm
31
unifi_m_ coat on inside of socket
to prevent
buildup
of excess
cement
Apply
second
coat.
9
While cement
is still wet. twist pipe into socket with
1/4 ram.
Be sure pipe is Jfully inserted
into fitting
socket.
10. Wipe excess
cement
fiom joint.
A continuous
bead of cement
will be visible
around
perimeter
of a properly
made joint.
11. Handle
pipe joints
careNlly
until cement
sets.
12. Support
combustion=air
and vent piping a n?inimmn
of every
5 ft (3 ft for SDR=2I
or -26 PVC)
using
perforated
metal
hanging
strap.
13. Slope
combustion=air
and vent pipes
downward
toward
fur-
nace a mininmm
of 1/4 in. per linear fi with no sags between
hangers.
14. Use appropriate
methods
to seal openings
where
vent
and
combustion=air
pipes pass through
roof or side wall.
CONCENTRI(
VENT
AND
COMBUSTION=AIR
TERMINATION
KIT INSTALLATION
NOTE:
If these
instructions
differ
fi'om
those
packaged
with
termination
kit, fbllow
kit instructions.
Combustion-air
and vent pipes must terminate
outside
structure
A
factory
accessory
tem_ination
kit must
be installed
in 1 of the
installations
shown in Fig. 36, 37, 38, 39, and 40. Font termination
kits are available
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