Carrier 59SP6A Installation, Start-Up, Operating, Service And Maintenance Instructions page 43

59SP6A: Installation, Start-up, Operating, Service and Maintenance Instructions
Size the Vent and Combustion Air Pipes
General
!
OPTIONAL CONFIGURATION FOR COMBUSTION AIR INLET
PIPE
In applications where there is a risk of excessive moisture entering the
combustion air inlet pipe, a moisture trap may be added to the inlet pipe
to help prevent moisture from entering the furnace from the combustion
air inlet pipe. See Fig. 52.
When sizing venting systems, the equivalent length of the optional
moisture trap (15 feet/5 M) must be taken into account.
Furnace combustion air and vent pipe connections are sized for 2-in. (50
mm ND) PVC/ABS DWV pipe. The combustion air and vent pipe
connections also accommodate 60 mm polypropylene venting systems
with outside diameters of approximately 60 mm (2-3/8 inches). Any pipe
diameter change should be made outside furnace casing in vertical pipe.
Any change in diameter to the pipe must be made as close to the furnace
as reasonably possible. See Fig.
Unit Size 40,000
Pipe Dia.
1 ½ 2
(in)
0-2000 40 155
2001-3000 35 150
3001-4000 30 135
4001-4500 130
Altitude
25
(feet) 4501-5000 125
5001-6000 20 120
6001-7000 15 110
7001-8000 100
10
8001-9000 90
9001-10000 5 80
Unit Size
40,000
Pipe Dia.
38 51
(mm)
0-610 12.1 47.2
611-914 10.6 45.7
915-1219 9.1 41.1
1220-1370 39.6
Altitude
7.6
(meters) 1371-1524 38.1
1525-1829 6.0 36.5
1830-2134 4.5 33.5
2135-2438 30.4
3.0
2439-2743 27.4
2744-3048 1.5 24.3
NOTE:
1.40K Inducer Outlet Restrictor disk (P/N 337683-401; 1.25-in. (32 mm) Dia.) shipped in the loose parts bag or available through Replacement Components required under 10-ft. (3 M)
TEVL in all orientations. Required for installations from 0 - 2000 ft. (0 to 610 M) above sea level. Failure to use an outlet restrictor may result in flame disturbances or flame sense
lock-out.
2.60K Inducer Outlet Restrictor disk (P/N 337683-401; 1.25-in. (32 mm) Dia. available through Replacement Components) required for less than 5-ft. (1.5 M) TEVL in downflow and
horizontal orientations only. Required for installations from 0 - 2000 ft. (0 to 610 M) above sea level.
3.120K Inducer Outlet Restrictor disk (P/N 337683-402; 1.50-in. (38 mm) Dia. available through
horizontal orientations only. Required for installations from 0 - 2000 ft. (0 to 610 M) above sea level.
Long
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
NOTICE
50.
Table 13 – Maximum Equivalent Vent Length - Ft. (M)
1 2
60,000
2 ½ 1 ½ 2 2 ½ 3
185 100 175 200
20
175 95 165 185
160 16 90 155 175
155 85 150 170
145 15 80 145 165
130 75 140 155
120 13 70 130 145
110 10 65 120 135
95 5 60 115 125
85 N/A 55 105 115
Maximum Equivalent Vent Length - Meters
1 2
60,000
64 38 51 64 76
56.3 30.4 53.3 60.9
6.0
53.3 28.9 50.2 56.3
48.7 4.8 27.4 47.2 53.3
47.2 25.9 45.7 51.8
44.1 4.5 24.3 44.1 50.2
39.6 22.8 42.6 47.2
36.5 3.9 21.3 39.6 44.1
33.5 3.0 19.8 36.5 41.1
28.9 1.5 18.2 35.0 38.1
25.9 NA 16.7 32.0 35.0
ELBOW CONFIGURATIONS
Medium
Mitered
NOT IN
HORIZONTAL
SECTION
Fig. 50 – Combustion Air and Vent Pipe Diameter Transition
The Maximum Vent Length for the vent and combustion air pipe (when
used) is determined from the Maximum Equivalent Vent Length in
Table 13 minus the number of fittings multiplied by the deduction for
each type of fitting used from
NOTE: Maximum Equivalent Vent Length (MEVL) includes standard
and concentric vent termination and does NOT include elbows. Use
80,000
1 ½ 2 2 ½ 3 4 2
15 55 130 175 200 20
125 165 185
49 15
115 155 175
10 150 165
44 110
145 160
10
41 100 135 150
38 125 140
90
36 120 125
N/A
33 80 110 115 N/A
30 75 100 105
80,000
38 51 64 76 102 51
4.5 16.7 39.6 53.3 60.9 6.0
38.1 50.2 56.3
14.9 4.5
35.0 47.2 53.3
3.0 45.7 50.2
13.4 33.5
44.1 48.7
3.0
12.4 30.4 41.1 45.7
11.5 38.1 42.6
27.4
10.9 36.5 38.1
NA
10.0 24.3 33.5 35.0 NA
9.1 22.8 30.4 32.0
Replacement Components) required for less than 5-ft. (1.5 M) TEVL in downflow and
VENT TERMINAL CONFIGURATIONS
Concentric
43
FURNACE
PIPE DIAMETER
TRANSITION IN
VERTICAL SECTION
Location and Elbow Configuration
Table 14.
100,000 120,000
2 ½ 3 4 2 ½ 3
80 175 200 75
10
165 185 70
75
175 5 65
155
70 170
150 165 60
65
140 155
60 135 145 N/A 50
55 125 135 46
50 115 125 43
45 100 115 39
100,000
120,000
64 76 102 64 76
24.3 53.3 60.9 22.8
3.0
50.2 56.3 21.3
22.8
53.3 1.5 19.8
47.2
21.3 51.8
45.7 50.2 18.2
19.8
42.6 47.2
18.2 41.1 44.1 NA 15.2
16.7 38.1 41.1 14.0
15.2 35.0 38.1 13.1
13.7 30.4 35.0 11.8
Standard 2-in., 3-in., or
optional 4-in. termination.
A93034
3 3
140,000
4 2 ½ 3 4
185 5 65 155
175 140
60
165 120
50 110
160
45 100
155 N/A 35 80
140 30 65
130 25 45
120 15 30
115 10 15
3 3
140,000
102 64 76 102
56.3 1.5 19.8 47.2
53.3 42.6
18.2
50.2 36.5
15.2 33.5
48.7
13.7 30.4
47.2 NA 10.6 24.3
42.6 9.1 19.8
39.6 7.6 13.7
36.5 4.5 9.1
35.0 3.0 4.5
A13110