Heatiator BH60 manual Venting, Vent Pipe

Venting

Venting

Use only 3” pellet vent pipe to vent your pellet boiler.

A combustion blower is used to extract the combustion gases from the firebox. This creates a negative pressure in the firebox and a positive pressure in the venting system as shown in Fig. 4. The longer the vent pipe and more elbows

Fig. 3

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used in the system, the greater the flow resistance, and the greater the chance for creosote accumulation. Because of

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these facts we recommend using as few elbows as possible and 18 feet or less of vent pipe. The maximum horizontal run should never exceed 8 feet.

Be sure to use wall and ceiling pass through fittings (which are approved for pellet vent pipe ) when going through combustible materials. Be sure to use a starting collar to attach the venting system to the stove. The starting collar must be sealed to the stove flue collar with high temp silicone caulking or aluminum tape, and screwed into the units’flue collar in a minimum of three (3) places.

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Total Lineal Feet Combined Should Not Exceed 18' as measured from the outlet.

The Total Lineal Feet

Decreases as the

Altitude Increases

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Maximum Horizontal Run 8'

Due to low exhaust temperatures, increasing the diameter of the venting or exceeding the recommendations of the venting graph, is strongly discouraged.

Vent Pipe

3” pellet vent pipe (also known as “PL” vent) is constructed of two layers with air space between the layers. This air space acts as an insulator and reduces the outside surface temperature to allow a minimum clearance to combustibles as low as 1 inch. In Canada the minimum clearance to combustibles is 3 inches. Check with the venting manufacturer to be certain of specified clearances.

The sections of pipe lock together to form an air tight seal in most cases; however, in some cases a perfect seal is not achieved. For this reason and the fact that the unit operates with a positive vent pressure, we specify that all joints within the structure should be secured with at least 3 screws, and sealed with silicone caulking.

NOTE:Use only 3” diameter Pellet venting system. Be sure to inspect and clean exhaust venting system frequently.

Fig. 4

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Creosote - Formation and Need for Removal - When wood is burned slowly, it produces tar and other organic vapors, which combine with expelled moisture to form creosote. The creosote vapors condense in the relatively cool chimney flue of a slow-burning fire. As a result, creosote residue accumulates on the flue lining. When ignited, this creosote makes an extremely hot fire. The pellet vent pipe should be inspected at least twice monthly during the heating season to determine if a creosote buildup has occurred. If creosote has accumulated it should be removed to reduce the risk of a chimney fire.

Guidance on minimizing creosote formation and the need for periodic creosote removal: The chimney should be inspected during the heating season to determine if a creosote build-up has occurred. If a significant layer of creosote has accumulated, 1/8” (3mm) or more, it should be removed to reduce the risk of a chimney fire.

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