Vermont Casting EWF30 Installing Outside Air Kit, Installation Precautions, 20008662

Nail Top

Standoffs

Nail Side

Nailing

Flanges

Vermont Castings EWF30

of the duct termination and the route of the duct run between the fireplace and the duct termination.

Duct run must be limited to a maximum distance of 40 feet from the fireplace pipe collar to duct termination. This will provide the least restriction to air flow. No more than four (4) 90° elbows can be used. Duct run may be horizontal, vertical, inclined or any combination of these. Vertical duct runs must be at least three (3) feet

FP1565

Fig. 12 Fasten fireplace in position.

Installing Outside Air Kit

An outside air kit may be installed on the EWF30. The AK-MST allows for 100% of required combustion air to come from outside source. If desired, or if local codes mandate the use of an air kit, then an AK-MST is required to complete the installation (from air kit to the outdoors). If the outside air kit is to be used, the

Duct Termination Must be More Than 3’ Below Chimney

Duct Termi- nation

40’ Max.

Duct Run

Attic

Ceiling

Duct

AK-MST MUST be installed BEFORE the fireplace is enclosed.

NOTE: Four (4) inch Class 1 air duct, material or metal duct (not supplied) may be used with AK-MST. (For installation in New York State, only aluminum, non- combustible flexible or type “O” metal ducting is permissible.)

Installation Precautions

The duct termination should be located so it is exposed to an out-of-doors opening at least 100 square inches. If the duct termination must be located in a crawl space or basement, be sure the termination area has 100 square inches of ventilation opening to outside air.

The duct termination must be located so it does not compete for air flow with exhaust fans, gas vent hoods or other air consuming devices or appliances. It must not be obstructed by rafters, insulation materials or other obstructions. The less restrictive the air supply, the better the AK-MST will perform.

It is a good practice to protect your hands and eyes during installation by wearing work gloves and safety glasses.

CAUTION: Do not install termination into a garage or other area that could contain flammable liquids or fumes, or into an attic space.

Installation Instructions

Determine the location of the fireplace as described in the fireplace Installation Manual. Then plan location

Soffit Termination

Exterior Wall

40’ Max. Duct Run

Rain Cap

Duct Termina-
tion	Duct
	Exterior Wall Termination	FP1060

Fig. 13 Typical installations.

below the fireplace chimney flue exit. (Fig. 13) You are now ready to install the AK-MST Outside Air Kit.

1.Remove and discard the outside air cover plate located at the center of the right side of the fireplace. Use care not to rub against the sharp edges of this opening to avoid cuts.

2.Attach the inlet collar with four (4) #10 screws to the side near the bottom of the fireplace. Slide the duct over the collar and attach the duct to the collar using the plastic tie straps or three (3) screws (screws not

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