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APPENDIX
APPENDIX G - VENTING SIZE DATA
While there is a positive flue pressure during operation, the combined pressure drop of vent and combustion air systems must not ex-
ceed the following equivalent length:
MODEL
ARRAY AR 399 SE
ARRAY AR 500 SE
Fittings as well as pipe lengths must be calculated as part of the equivalent length, according to the following table:
MODEL
ARRAY AR 399 SE
ARRAY AR 500 SE
Data for Venting size
ARRAY AR 399 SE
CO
2
Exhaust gas mass (weight)
Flue temperature
Max. pressure at boiler exit @ high fire con-
dition
ARRAY AR 500 SE
CO
2
Exhaust gas mass (weight)
Flue temperature
Max. pressure at boiler exit @ high fire con-
dition
Cascade Venting of Multiple Boiler Installations
When multiple boilers of the same model size are installed within a common room it is permissible to cascade the venting connecting all
boilers to a single exhaust system. No more than eight (8) boilers should be cascade vented together.
The boiler/ vent installation must be in compliance with ANSI Z223.1/ NFPA 54 and all local, state, and federal regulations for building code.
Venting system shall be designed to maintain suitable vent pressure at the boiler exhaust collar.
For a list of suitable venting materials consult the installation manual section: "Venting material" page 68
Adapters are available for various brands of venting materials. Consult the factory for a list of available adapters.
Venting components from different manufacturers shall not be mixed.
Adequate combustion air must be supplied to the boiler to ensure safe operation. A properly sized direct connected common combustion
air duct may be used for sealed combustion air to the boiler cascade.
For additional information regarding combustion air supply consult the installation manual section: "Combustion Air" page 69
Prior to installing a permanent vent system refer to the Installation Manual, ANSI Z223.1/ NFPA 54, and all local, state, and federal regula-
tions for building code to ensure compliance with the requirements of these articles.
PIPE SIZE - 4"
MAX equiv. mt
MAX equiv. ft
30
20
45° ELBOW - 4"
MAX equiv. mt
MAX equiv. ft
1,5
1,5
T supply / return (F°) - 176 / 140
Maximum Input
Minimum Input
9%
6.56 lb/s
0.65 lb/s
161.6 °F
143.6 °F
0,9 in H
0
220 Pa
0,1 in H
2
T supply / return (F°) - 176 / 140
Maximum Input
Minimum Input
9,3%
7.99 lb/s
0.82 lb/s
161.6 °F
143.6 °F
0,8 in H
0
200 Pa
0,1 in H
2
61
61
PIPE SIZE – 5"
MAX equiv. mt
100
-
65
30
90° ELBOW - 5"
MAX equiv. mt
5
3,7
5
3,7
T supply / return (F°) - 104 / 86
Maximum Input
9%
9%
6.56 lb/s
107.6 °F
0
20 Pa
0,9 in H
0
230 Pa
2
2
T supply / return (F°) - 104 / 86
Maximum Input
9%
9,3%
7.99 lb/s
107.6 °F
0
20 Pa
0,9 in H
0
2
2
RECYCLING AND DISPOSAL
APPENDIX
MAX equiv. ft
-
100
MAX equiv. ft
12
12
Minimum Input
9%
0.66 lb/s
89.6 °F
0,1 in H
0
25 Pa
2
Minimum Input
9%
0.82 lb/s
89.6 °F
220
0,1 in H
0
20 Pa
2
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