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Carrier 59SP5A Installation, Start-Up, Operating And Service And Maintenance Instructions page 44

100 series

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Table 13 - Maximum
Equivalent
Vent Length
- Ft. (M)
0 to 4500 Ft. (0 to 1370 M) Altitude
NOTE:
Maximum
Equivalent
Vent Length
(MEVL)
does" NOT
include
elbows
or terminations.
Use Table 14 - Deductions
from
Maximum
Equivalent
Vent Length
to determine
allowable
vent length for each application.
Altitude
FT (M)
DIRECT VENT (2-PIPE) AND NON-DIRECT
VENT (1-PIPE)
Unit Size
Vent Pipe
BTU/Hr
40,000 *2
60,000
0 to 2000
80,000
(0 to 610)
100,000
120,000
40,000"
60,000
2001
to 3000
80,000
(610 to 914)
100,000
120,000
40,000"
60,000
3001
to 4000
80,000
(914 to 1219)
100,000
120,000
40,000"
4001
to 4500
60,000
(1219
to
80,000
1370)
100,000
120,000
NOTE: See notes at end of venting tables.
1-1/2
50
(15.2)
30
(9.1)
20
(6.1)
45
(13.7)
27
(8.2)
17
(5.2)
39
(11.9)
23
(7.0)
15
(4.6)
36
(11.0)
21
(6.4)
14
(4.3)
See Table 15 for altitudes over 4500 ft. (1370 M)
*Not all families have these models.
Diameter
(in.)
2
2-1/2
210
(64.0)
250
(76.2)
135
(41.1)
235
(71.6)
265
70
(21.3)
175
(53.3)
235
25
(7.6)
110
(33.5)
235
15
(4.6)
1O0
198
(60.4)
232
(70.7)
127
(38.7)
222
(67.7)
250
64
(19.5)
165
(50.3)
222
22
(6.7)
104
(31.7)
223
11
(3.4)
93
184
(56.1)
214
(65.2)
119
(36.3)
210
(64.0)
235
59
(18.0)
155
(47.2)
210
19
(5.8)
98
(29.9)
211
8
(2.4)
86
177
(53.9)
205
(62.5)
115
(35.1)
204
(62.2)
226
56
(17.1)
150
(45.7)
202
17
(5.2)
94
(28.7)
205
83
(60.8)
(71.6)
265
(80.8)
(71.6)
265
(80.8)
(30.5)
250
(76.2)
(76.2)
(67.7)
249
(75.9)
(68.0)
250
(76.2)
(28.3)
237
(72.2)
(71.6)
(64.0)
232
(70.7)
(64.3)
236
(71.9)
(26.2)
224
(68.3)
(69.5)
(61.6)
224
(68.3)
(62.5)
229
(69.8)
(25.3)
217
(66.1)
Table
14 - Deductions
from
Maximum
Equivalent
Vent
Length
- Ft.
(M)
Pipe
Diameter
(in):
1-1/2
2
2-1/2
3*
4*
Mitered
90 ° Elbow
8
(2.4)
8
(2.4)
8
(2.4)
Medium
Radius
90 ° Elbow
5
(1.5)
5
(1.5)
5
(1.5)
Long
Radius
90 ° Elbow
3
(0.9)
3
(0.9)
3
(0.9)
3
(0.9)
3
(0.9)
Mitered
45 ° Elbow
4
(1.2)
4
(1.2)
4
(1.2)
Medium
Radius
45 ° Elbow
2.5
(0.8)
2.5
(0.8)
2.5
(0.8)
Long
Radius
45 ° Elbow
1.5
(0.5)
1.5
(0.5)
1.5
(0.5)
1.5
(0.5)
1.5
(0.5)
Tee
16
(4.9)
16
(4.9)
16
(4.9)
16
(4.9)
16
(4.9)
Note: 3-
and 4-in.
Vent
Venting
System
Length
Calculations
The
maximum
length
for each
vent
pipe
(inlet
or exhaust)
equals
the Maximum
Equivalent
Vent
Length
(MEVL)
from
Table
13 or Table
15
minus
the number
of elbows
nmltiplied
by the deduction
for each
elbow
in Table
14.
Standard
vent
terminations
and
concentric
vent
terminations
count
for zero
deductions.
Example
A direct-vent 60,000 Btuh furnace installed at 2100 ft. (640 M ) with 2-in. (51 ram) vent piping.
Venting system includes, FOR EACH
PIPE, (3) 90 ° long radius elbows, (2) 45 ° long radius elbows and a concentric vent kit.
Maximum Equivalent Vent Length
Deduct (3) 90 long radius
Deduct (2) 45 long radius
Maximum Vent Length
=
127 ft.
3
x
3ft.
=
9ft.
2
x
1.5 ft.
=
3ft.
=
115 ft.
(From Table 13)
(From Table 14)
(From Table 14)
For EACH vent or inlet pipe
44

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