Roberts Gorden TF-300, TF-350 Venting, Carbon Monoxide Hazard, Cut/Pinch Hazard, Edges are sharp

SECTION 9: VENTING

SECTION 9: VENTING

WARNING

Carbon Monoxide Hazard

Heaters installed unvented must be interlocked with sufficient building exhaust.

Heaters must be installed according to the installation manual.

Failure to follow these instructions can result in death or injury.

WARNING

Cut/Pinch Hazard

Wear protective gear during installation, operation and service.

Edges are sharp.

Failure to follow these instructions can result in injury.

9.1 Venting Requirements

This heater must be vented in accordance with the rules contained in this manual and with the following national codes and any state, provincial or local codes which may apply:

United States: Refer to National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest revision.

Canada: Refer to Natural Gas and Propane Installation Code CSA B149.1 - latest revision.

Any portion of vent pipe passing through a

combustible wall or roof must be dual insulated (Type

B)vent pipe and have an approved thimble to conform with the above listed codes.

Vent pipe must be sloped downward away from the burner, 1/2" (1 cm) for every 20' (6 m).

Both sides of the TF-Series heater may be

individually vented 4" (10 cm) or common vented 6" (15 cm).

The heater may also be installed unvented in certain

circumstances according to building ventilation codes. Refer to the above codes for further information. Unvented operation also requires compliance with the clearances to combustibles given on Page 9, Figure 12.

The bottom of the vent or air intake terminal shall not be located less than 1' (0.3 m) above grade level.

The vent shall not terminate less than 7' (2.1 m) above grade where located adjacent to public walkways.

Vent terminal must be installed at a height sufficient to prevent blockage by snow and building materials protected from degradation by flue gases.

Vent must be at least 6' (2 m) from the combustion air opening of this unit, or any other appliance. Secure all joints with #8 x 3/8 sheet metal screws. Seal all joints with high temperature silicone sealant. Vent terminal must be beyond any combustible overhang.

9.1.1 United States Requirements

Vent must terminate at least 3' (0.9 m) above any forced air inlet located within 10' (3.1 m).

Vent must terminate at least 4' (1.2 m) below, 4' (1.2 m) horizontally from, or 1' (0.3 m) above any door, operable window, or gravity air inlet into any building.

9.1.2 Canadian Requirements

The vent shall not terminate within 6' (1.8 m) of a mechanical air supply inlet to any building.

The vent shall not terminate within 3' (0.9 m) of a window or door that can be opened in any building, any non-mechanical air supply inlet to any building, or of the combustion air inlet of any other appliance.

9.2 Unvented Operation

Sufficient ventilation must be provided in the amount of 4 cfm per 1000 BTU/hr firing rate (United States); 3 cfm per 1000 BTU/hr firing rate (Canada).

Use of optional outside combustion air is not recommended with unvented heaters.

If exhaust fans are used to supply ventilation air, an interlock switch must be used to prevent the heater from coming on when the fans are off. This may be done using a pressure switch.

9.3 Horizontal Venting

In noncombustible walls only, vent terminal (P/N 02537801-1P) may be used.

For 4" (10 cm) vents in either combustible or noncombustible walls, use Tjernlund VH1-4 (P/N 90502100) or equivalent, insulated vent terminal. Follow the manufacturer's instructions for proper installation.

For 6" (15 cm) common vents in either combustible or noncombustible walls, use Tjernlund VH1-6 (P/N 90502101) or equivalent, insulated vent terminal.

Follow the manufacturer's instructions for proper installation.

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