Hearth and Home Technologies ST42A owner manual Troubleshooting, Understanding Vent Problems

This fi replace will operate correctly only if adequate ventila- tion is provided to allow proper draft to the fi replace system. Hearth & Home Technologies assumes no responsibility for the improper performance of the fi replace system caused by inadequate draft due to environmental conditions, down drafts, tight sealing construction of the structure, or mechan- ical exhausting devices which will create a negative air pres- sure within the structure where the fi replace is located.

A. Understanding Vent Problems

If smoke spillage occurs from a fi replace opening when the door is open and the proper chimney height, fl ue size, and confi guration requirements for the installation have been met, there is either a leakage in the fl ue, a blockage in the

flue, or some condition is in effect to draw smoke from the fi replace into the house. Understanding and differentiating the conditions which can cause each of these kinds of spill- age problems is essential to their solution.

•Flue Leakage

Check for improperly connected fl ue joints or a damaged fl ue joint in the chimney system. Such leakage would reduce draft (air would be drawn in through the leaks rather than through the fi replace). The result might be difficult start-up and smoky fi res that might spill if other adverse draft conditions accompany this problem.

•Flue Blockage

The damper should be open.

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Bird's nest or leaves in termination cap?

Another appliance in home also exhausting air (furnace, fan, dryer, etc.)?

Overhead fan operating?

Air register from furnace near fireplace?

Doors opening and closing? Window closed for start-up?