Bryant Deluxe 4 WAy Gas Furnase 355MAV - Manual (Page 35)

NOTE: A 2-in. diameter pipe must be used within the furnace casing. Make all pipe diameter transitions outside furnace casing.
g. Drill a 1/8-in. hole in 2-in. combustion-air pipe using hole in intake housing as a guide.
h. Install a field-supplied No. 6 or No. 8 sheet metal screw into combustion-air pipe.
NOTE: DO NOT OVERTIGHTEN SCREW. Breakage to intake housing or fitting may cause air leakage to occur.
NOTE: Do not attach combustion-air intake pipe permanently to combustion-air intake housing since it may be necessary to remove pipe for
service of ignitor or flame sensor.
Combustion-Air Intake Housing Plug Fitting: The combustion-air intake plug fitting must be installed in unused combustion-air intake housing.
This fitting must be attached by using RTV sealant, or by drilling a 1/8-in. hole in fitting, using hole in intake housing as a guide. Install a
field-supplied No. 6 or No. 8 sheet metal screw.
NOTE: DO NOT OVERTIGHTEN SCREW. Breakage to intake housing or fitting may cause air leakage to occur.
A plugged drain connection has been provided on this fitting for use when moisture is found in combustion-air intake pipe and combustion box.
NOTE: Moisture in combustion-air intake may be result of improper termination. Ensure combustion-air intake pipe termination is similar to that
shown in Fig. 39, 40, 41, 42, and 43 so it will not be susceptible to areas where light snow or other sources of moisture could be pulled in.
Table 7—Maximum Allowable Pipe Length (ft) (Continued)
ALTITUDE (FT) UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
1 2 3 4 5 6
4001 to 5000‡
042040
2 Pipe or 2-in
Concentric
1-1/2 40 35 30 25 20 15
2 70 70 70 70 70 70
042060
2 Pipe or 2-in
Concentric
1-1/2 40 35 30 25 20 15
2 70 70 70 70 70 70
042080
060080
2 Pipe or 2-in
Concentric
1-1/2 23 18 13 8 NA NA
2 70 70 70 70 70 68
060100
2 Pipe or 2-in
Concentric
2 36 31 26 21 16 11
2-1/2 70 70 70 70 70 70
060120
2 Pipe or 3-in.
Concentric
3† 56 55 54 53 52 52
ALTITUDE (FT) UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
1 2 3 4 5 6
5001 to 6000‡
042040
2 Pipe or 2-in
Concentric
1-1/2 37 32 27 22 17 12
2 70 70 70 70 70 70
042060
2 Pipe or 2-in
Concentric
1-1/2 37 32 27 22 17 12
2 70 70 70 70 70 70
042080
060080
2 Pipe or 2-in
Concentric
1-1/2 22 17 12 7 NA NA
2 70 70 70 70 68 63
060100
2 Pipe or 2-in
Concentric
2 33 28 23 18 13 8
2-1/2 70 70 70 70 70 70
060120
2 Pipe or 3-in.
Concentric
3† 53 52 50 49 48 47
ALTITUDE (FT) UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
1 2 3 4 5 6
6001 to 7000‡
042040
2 Pipe or 2-in
Concentric
1-1/2 35 30 25 20 15 10
2 70 70 68 67 66 64
042060
2 Pipe or 2-in
Concentric
1-1/2 35 30 25 20 15 10
2 70 70 68 67 66 64
042080
060080
2 Pipe or 2-in
Concentric
1-1/2 20 15 10 5 NA NA
2 70 70 68 67 62 57
060100
2 Pipe or 2-in
Concentric
2 31 26 21 16 11 6
2-1/2 70 70 68 67 66 64
060120
2 Pipe or 3-in.
Concentric
3† 49 48 47 45 44 43
ALTITUDE (FT) UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
1 2 3 4 5 6
7001 to 8000‡
042040
2 Pipe or 2-in
Concentric
1-1/2 32 27 22 17 12 7
2 66 65 63 62 60 59
042060
2 Pipe or 2-in
Concentric
1-1/2 32 27 22 17 12 7
2 66 65 63 62 60 59
042080
060080
2 Pipe or 2-in
Concentric
1-1/2 18 13 8 NA NA NA
2 66 65 63 62 57 52
060100
2 Pipe or 2-in
Concentric
2 29 24 19 14 9 NA
2-1/2 66 65 63 62 60 59
060120
2 Pipe or 3-in.
Concentric
3† 46 44 43 41 40 38
See notes at end of table.
—35—