Heatiator NB4842M, NB4236MI Appliance Preparation, A. Installing Outside Air Kit Damper Assembly

7	Appliance Preparation
	CAUTION		CAUTION
		Risk of Smoke Spillage
	Sharp Edges
		Outside air inlet must be located to prevent blockage
	• Wear protective gloves
	and safety glasses during	from:
	installation.	•	Leaves
		•	Snow/ice
A. Installing Outside Air Kit Damper Assembly		•	Other debris
		Blockage may cause combustion air starvation.

WARNING

Fire Risk

Asphyxiation Risk

Maintain vent clearance to combustibles as specified.

•Do not pack air space with insulation or other materials.

•National building codes recommend using attic shield to keep loose materials/ insulation from contacting vent.

Failure to keep insulation or other materials away from vent pipe may cause fire.

This appliance will operate correctly only if adequate ventia- tion is provided to allow proper draft to the system.

An outside air kit is available as an optional feature with this appliance. An outside air kit helps to decrease the amount of room air taken by utilizing outside air for combustion. We strongly recommend that it be installed.

Note: the outside air kit inlet thimble should be positioned in a manner that will not allow snow, leaves, etc. to block the inlet. A 3 ft. (.91 m) minimum height difference must be

Figure 7.1 Outside Air Kit Installation
NO	NO
	Garage or	NO
Outlet blocked by	combustible
snow, leaves, etc.	liquids storage	Attic space
		NO

maintained from the top of the uppemost chimney section to the outside combustion air inlet. Reference Section 2.

•The outside air kit can only be installed on the left side of the appliance.

•Refer to the installation instructions provided with the kit.

WARNING

Fire Risk

Asphyxiation Risk

YES

Clear area

outside

house or in

ventilated

crawl space

Outlet placed

higher than 3 ft

below the

termination cap

Factory-built

fireplace

Use only duct materials specified by manufacturer (preferably with short run or mainly straight duct, except small dip for cold air trap which will help prevent flow of cold air).

Do not draw outside combustion air from:

•Wall, floor or ceiling cavity.

•Enclosed space such as an attic or garage.

•Close proximity to exhaust vents or chimneys.

Fumes or odor may result.

Figure 7.2 Outside Combustion Air Placement

16 Heatilator • Novus BV-Mesh • 4031-553 Rev F • 11/07