TaNe7--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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