Harman Stove Company R16 manual Venting, Important Notice

Venting

IMPORTANT NOTICE

Approved Pellet Vent Pipe (3" or 4") Must Be Used unless installing with the optional top 6" Flue Adapter.

If using 6" Flue Adapter, it is recommended to use a sealed seam 6" flue pipe (snaplock seam is not recommended) secure each joint with at least 3 screws, and seal with high temperature silicone.In some cases it may be necessary to use a liner in the existing chimney to obtain proper draft.

Caution

Do not connect to any air distribution duct or system.

+= Positive Static Pressure - = Negative Static Pressure

Fig. 6

INSTALL VENT AT CLEARANCES SPECIFIED BY THE VENT MANUFACTURER.

Venting

A combustion blower is used to extract the combustion gases from the firebox. This causes a negative pressure in the firebox and a positive pressure in the venting system as shown in Fig. 6. The longer the vent pipe and more elbows used in the system, the greater the flow resistance. Because of these facts we recommend using as few elbows as possible and 15 feet or less of vent pipe. The maximum horizontal run should not exceed 48". If more than 15 feet of pipe is needed, the interior diameter should be increased from 3" to 4" because a larger pipe causes less flow resistance. Be sure to use approved pellet vent pipe wall and ceiling pass-through fittings to go through combustible walls and ceilings. The use of a starting collar is not always necessary. The first piece of pellet vent pipe must be fastened to the appliance flue collar with at least 3 fasteners. The fasteners provided are a self-drilling type, however, due to material thickness, drilling a 3/32" pilot hole for each screw is recommended. Follow vent manufacturer's instructions for proper connection at each joint.

Vent Pipe

Pellet venting pipe (Known as "L" or "PL" venting) is constructed of two layers with air space between the layers. This air space is an insulator which reduces the surface temperature and allows a clearance to combustibles of 3 inches or less. 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 XXV operates with a positive vent pressure we specify that the joints also be sealed with silicone.

All joints for connector pipe must be fastened or secured with a minimum of three screws. We cannot emphasize enough, the importance of sealing every seam and joint in the venting system which is inside the home. Even the smallest pin hole can leak and when it does you will smell wood smoke or a creosote smell in the room. If this occurs check for leaks. Leaks are easiest to see during start-up. Alternatively you can use a smoke pellet to leak test the venting before lighting your first fire.

XXV Pellet Stove 9