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7.3 Remote Combustion Air Cap
A UL Listed air intake vent termination cap MUST be attached to the remote combustion air vent termination to
adequately protect the combustion air inlet from wind and weather. A UL Listed air intake termination cap is available
from Riverside Hydronics and may have shipped with the boiler as a purchased option.
7.4 Vertical or Horizontal Remote Air Duct Termination
Air inlet and exhaust vents should terminate in the same wind pressure area whenever possible.
Air inlet must be located no less than 3 feet (0.91m) below the exhaust terminal if they are within 10 feet (3.05 m)
of each other.
If terminating through the roof, the air inlet must terminate at least 12 inches (0.3 m) above roof level and at least
12 inches (0.3 m) above snow levels.
If terminating through a sidewall, the air inlet must terminate at least 12 inches (0.3 m) above grade and/or at
least 12 inches (0.3 m) above normal snow levels.
Vertical Remote Air Horizontal Remote Air
7.6 Remote Air Consideration for Combined Remote Air Ducting
Each boiler MUST have separate intake piping. Consult factory for common air intake assistance.
8 VENTING
8.1 The Category IV gas vent connected to this appliance may terminate either above the roof surface or through the side
wall. It must comply with the latest edition of the National Fuel Gas Code, ANSI Z223.1 or, in Canada, CAN/CSA B149
Installation Codes, and the applicable provisions of the local building codes.
Follow the category IV vent manufacturers’ instruction for installation, sealing and support of their vent system.
For proper vent operation and to protect the gas vent from wind and weather, use ONLY the listed vent terminal
specified by the Category IV vent system manufacturer.
Important: Do not use a barometric damper when applying Category IV venting.
8.2 Category IV - The Centauri product operates with a positive vent static pressure, and with a vent gas temperature
that forms condensate in the vent.
This product uses the positive pressure generated by the burner system blower to push combustion products out of
the vent. The vent system must be a stainless steel and UL, ULC, ETL, or CSA certified for use with an appliance
requiring a Category IV, pressurized vent system. Seal all joints and support horizontal lengths of vent and follow all
installation instructions required by the vent manufacturer.
(38 paginas)
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