Bryan Boilers & 300, Triple-Flex 150, 250 Marking of GAS Vents, Before Placing Boiler in Operation

Combustion Air Supply Dampers, Louvers, and Grilles

The free area of the combustion air supply opening shall be calculated by subtracting the blockage area of all fixed louvers, grilles or screens from the gross area of the opening.

Openings in a fixed louver, grille, or screen shall have no dimension smaller than ¼” (6 mm).

No manually operated damper or manually operated adjustable louvers are permitted.

A motorized damper or louvers shall be interlocked so the burner(s) cannot operate unless the damper or louver is in the fully open position.

Mechanical Combustion Air Supply

When combustion air is supplied by mechanical means, an airflow sensing device shall be installed and wired into the safety limit circuit of the primary safety control to shut off the gas in the even a an air supply failure.

Appliance Venting per CAN/CSA-B149.1- 05

Paragraph 8.9 of CAN/CSA-B149.1-05 addresses “Appliance Venting”. Paragraphs 8.9 through 8.31 address many facets of flue gas vents, many of which do not apply to the Triple-Flex boiler, which is a Category IV listed appliance requiring the use of special venting systems as previously described.

NOTE:

Please note that the information provided in this manual relative to the Canadian Standard is not meant to be all-inclusive. Reading the entire Standard is strongly suggested. The final approval of all system designs must be acceptable to the authority having jurisdiction.

•Venting for Category IV appliances shall be as specified or furnished by the manufacturer of the listed appliance. The Triple-Flex boiler is a Category IV appliance requiring the use of special vent that is certified.

•A special venting system shall be installed in accordance with the terms of it’s listing and the vent manufacturers certified installation manual.

•A flue gas vent or a vent connector shall not be installed in either a duct or a

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Date: 8-4-2010

Revision: 0

Form: 2396

shaft used for return air, hot air, ventilating air, or combustion air.

•An appliance that operates at a positive vent pressure shall not be connected to a venting system serving any other

appliance. The Triple-Flex boiler operates at a positive vent pressure.

•A factory-built chimney used for venting an appliance shall be certified.

Vent Sizing

•A vent or chimney serving a single appliance shall provide effecting venting and shall be sized so that it’s effective area is not less than that of the flue outlet diameter of the boiler and in accordance with engineering venting tables acceptable to the authority having jurisdiction.

•A vent or chimney serving more than one appliance shall provide effective venting and shall be sized in accordance with good engineering practice, such as by the use of engineering venting tables acceptable to the authority having jurisdiction.

1.7.3MARKING OF GAS VENTS

Where solid and liquid fuels are used, gas vents, must be plainly and permanently identified by a label. The label should read, "This gas vent is for appliances that burn gas only. Do not connect to incinerators or solid or liquid fuel burning appliances."

This label must be attached to the wall or ceiling at a point near where the gas vent connector enters the wall, ceiling or chimney.

The authority having jurisdiction must determine whether their area constitutes such a locality.

Solid Fuel Appliance Vents

Gas appliances shall not be vented to a vent or a chimney that serves a solid-fuel burning appliance.

1.8BEFORE PLACING BOILER IN OPERATION