MHP EWF36A Installation Instructions, Installating Outside Air Kit, Installation Precautions

Nail Top Stand- offs

Nail Side

Nailing

Flanges

FP1197

Fig. 12 Fasten fireplace in position.

Vermont Castings EWF36A

Installation Instructions

Determine the location of the fireplace as described in the fireplace Installation Manual. Then plan location 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 below the fireplace chimney flue exit. (Fig. 13) You are now ready to install the AK-MST Outside Air Kit.

Installating Outside Air Kit

An outside air kit may be installed on the EWF36A. If desired, or if local codes mandate the use of an air kit, then two (2) AK-MSTs are required to complete the installation (from air kit to the outdoors). If the outside air kits are to be used, the AK-MSTs MUST be installed BEFORE the fireplace is enclosed.

NOTE: Air duct assemblies must be installed in con- junction with the AK-MST or cold air will enter the home. (Fig. 14)

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-

Duct Termination Must be More Than 3’ Below Chimney

Duct Termi- nation

40’ Max.

Duct Run

Attic

Ceiling

Duct

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.

Soffit Termination

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

Exterior Wall

Rain Cap

Duct Termina- tion

40’ Max. Duct Run

Duct

glasses.

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

Exterior Wall Termination FP1060

Fig. 13 Typical installations.

1.Remove and discard the outside air cover plate located at the center of both sides of the fireplace. Use care not to rub against the sharp edges of this opening to avoid cuts. Remove the four (4) screws

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