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SHUTDOWN
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APPENDIX
Appendix H - VENTING SIZE DATA
ARRAY AR 3000
T supply / return (F°) : 176 / 140 T supply / return (F°) : 104 / 86
Max. Input Min. Input Max. Input Min. Input
O
2 5.0% 5.0% 5.0% 5.0%
Exhaust gas mass ow rate 0.78 lb/s 0.02 lb/s 0.78 lb/s 0.02 lb/s
Flue temperature 161.6 °F 143.6 °F 107.6 °F 89.6 °F
Max. pressure at boiler exit @
high re condition
0.78 in H
2O 194 Pa 0.08 in H2O 19 Pa 1.06 in H2O 265 Pa 0.16 in H2O 40 Pa
ARRAY AR 4000
T supply / return (F°) : 176 / 140 T supply / return (F°) : 104 / 86
Max. Input Min. Input Max. Input Min. Input
O
2 5.0% 5.0% 5.0% 5.0%
Exhaust gas mass ow rate 1.04 lb/s 0.02 lb/s 1.04 lb/s 0.02 lb/s
Flue temperature 161.6 °F 143.6 °F 107.6 °F 89.6 °F
Max. pressure at boiler exit 0.76 in H
2O 189 Pa 0.08 in H2O 19 Pa 1.03 in H2O 257 Pa 0.16 in H2O 40 Pa
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: “4.15 Venting” page 23
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: “4.16 Combustion Air”
Prior to installing a permanent vent system refer to the Installation Manual, ANSI Z223.1/ NFPA 54, and all local, state, and federal
regulations for building code to ensure compliance with the requirements of these articles.
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