3.0 Installation
The gas-fired modulating boilers are low pressure, fully condensing units having a variable input range.
Approved as “Category IV” vented appliances, the boilers use either Direct Vent (sealed combustion) or
indoor combustion air, providing a great degree of installation flexibility.
3.1 Code requirements
The boilers are tested and certified under CSA 4.9-2017 / ANSI Z21.13-2017. Below are the code
requirements for every installation.
Canada US
Conform to local codes, or in the absence of these,
with the latest editions of CAN/CGA B149.1 and the
Canadian Electrical Code Part 1 CSA C22.2 No. 1.
Where required by jurisdiction, installation must
conform to the Standard for Controls and Safety
Devices for Automatically Fired Boilers, ANSI/ASME
CSD-1.
If there is any conflict, follow the more stringent
regulations.
Conform to the current National Fuel Gas Code ANSI
Z223.1 and the National Electrical Code ANSI/NFPA
70.
Where required by jurisdiction, installation must
conform to the Standard for Controls and Safety
Devices for Automatically Fired Boilers, ANSI/ASME
CSD-1.
If there is any conflict, follow the more stringent
regulations.
Table 3 Code requirements by country
3.2 Determining location of the unit
The boilers are designed and approved for indoor installation in areas such as an alcove, basement, or utility
room. These areas should have a surrounding temperature of 32 °F (0°C) to 122 °F (50 °C) and less than
90% relative humidity.
Even though EX models are approved from installation on combustible floors, do not install them on carpet.
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