Table of Contents
Advertisement
935CA: Installation, Start-up, Operating and Service and Maintenance Instructions
NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows. Use
Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application.
Unit Size
Pipe Dia.
1 ½
(in)
0-2000
20
Altitude
2001-3000
(feet)
3001-4000
16
4001-4500
4501-5000
15
5001-5400
ELBOW CONFIGURATIONS
Long
Medium
Pipe Diameter (in):
Mitered 90º Elbow
Medium Radius 90º Elbow
Long Radius 90º Elbow
Mitered 45º Elbow
Medium Radius 45º Elbow
Long Radius 45º Elbow
Tee
Concentric Vent Termination
Standard Vent Termination
NOTE:
8. Use only the smallest diameter pipe possible for venting. Over-sizing may cause flame disturbance or excessive vent terminal icing or freeze-up.
9. NA - Not
allowed. Pressure transducer
10. Vent sizing for Canadian installations over 4500 ft. (1370 M) above sea level are subject to acceptance by the local authorities having jurisdiction.
11. Size both the combustion air and vent pipe independently, then use the larger size for both pipes.
12. Assume the two 45_ elbows equal one 90_ elbow. Wide radius elbows are desirable and may be required in some cases.
13. Elbow and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow count.
14. The minimum pipe length is 5 ft. (2 M) linear feet (meters) for all applications.
15. Use 3-in. (76 mm) diameter vent termination kit for installations requiring 4-in. (102 mm) diameter pipe.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 18 – Maximum Equivalent Vent Length - Ft.
60,000
2
2 ½
3
1 ½
100
175
200
15
95
165
185
90
155
175
85
150
170
10
80
145
165
75
140
155
Mitered
Table 19 – Deductions from Maximum Equivalent Vent Length - Ft. (M)
1-1/2
8
(2.4)
8
5
(1.5)
5
3
(0.9)
3
4
(1.2)
4
2.5
(0.8)
2.5
1.5
(0.5)
1.5
16
(4.9)
16
NA
0
0
(0.0)
0
will not close, or flame disturbance may result.
80,000
2
2 ½
3
55
130
175
200
125
165
185
49
115
155
175
44
110
150
165
44
110
145
160
41
100
135
150
VENT TERMINAL CONFIGURATIONS
Concentric
2
2-1/2
(2.4)
8
(2.4)
(1.5)
5
(1.5)
(0.9)
3
(0.9)
(1.2)
4
(1.2)
(0.8)
2.5
(0.8)
(0.5)
1.5
(0.5)
(4.9)
16
(4.9)
(0.0)
NA
(0.0)
0
(0.0)
41
100,000
4
2
2 ½
3
20
80
175
165
15
75
155
70
10
150
65
140
Standard 2-in., 3-in., or
optional 4-in. termination.
3
8
(2.4)
8
5
(1.5)
5
3
(0.9)
3
4
(1.2)
4
2.5
(0.8)
2.5
1.5
(0.5)
1.5
16
(4.9)
16
0
(0.0)
0
(0.0)
0
Table 19
-
4
200
185
175
170
165
155
A13110
4
(2.4)
(1.5)
(0.9)
(1.2)
(0.8)
(0.5)
(4.9)
NA
(0.0)
Advertisement
Table of Contents
