COMFORT-AIRE Century GDD95C Series, Руководство по установке

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507735-03 Page 17 of 53 Issue 1933
Figure 22. Typical Exhaust Pipe Connections
Pipe size determined in table 7.
2”
TOP VIEW
EXHAUST
INTAKE
2”
2”
2”
2”
or
TRANSITION
3”
*2”
*2”
1-1/2”
or
TRANSITION
NOTE : 1-1/2” Vent Pipe
Diameter Allowed Only
on 045/070 Units
DO NOT transition
from larger to smaller
pipe in horizontal runs
of
exhaust pipe
.
DO NOT transition
from smaller to larger
pipe in horizontal runs
of
exhaust pipe
.
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE : Exhaust pipe and intake pipe must be the same diameter.
Maximum Allowable Exhaust Vent Lengths with Furnace Installed in a Closet or Basement Using Ventilated Attic or Crawl
Space for Intake Air in Feet
Standard Termination at Elevation 0 − 10,000 ft.
Number
of 90 °
Elbows
Used
1-1/2” Pipe 2” Pipe 2-1/2” Pipe 3” Pipe
Capacity Capacity Capacity Capacity
045 070 090 110 045 070 090 110 045 070 090 110 045 070 090 110
1 15 10
n/a n/a
61 46 24
n/a
100 80 43
n/a
127 127 108 108
2 10
n/a
56 41 19 95 75 38 122 122 103 103
3
n/a
51 36 14 90 70 33 117 117 98 98
4 46 31
n/a
85 65 28 112 112 93 93
5 41 26 80 60 23 107 107 88 88
6 36 21 75 55 18 102 102 83 83
7 31 16 70 50 13 97 97 78 78
8 26 11 65 45
n/a
92 92 73 73
9 21
n/a
60 40 87 87 68 68
10 16 55 35 82 82 63 63
NOTE : Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length
calculation.
Table 8.