Martin Fireplaces 400BWBCA ユーザーズマニュアル

61D0008

OUTSIDE COMBUSTION AIR PRECAUTIONS AND RECOMMENDATIONS

The use of outside air for combustion is optional unless required by building codes. It is only necessary to supply outside

combustion air to one side of the ﬁreplace. Use the model AK4 combustion air kit.

MODEL AK-4 COMBUSTION AIR ASSEMBLY

1. Remove the cover plate from the 4" outlet opening location on the left or

right outside of the ﬁreplace.

2. Place the insulation ring between the AK-4 starting collar and fire-

place wall.

3. Place the starting collar (4") into the hole on the side of ﬁreplace. Fasten it in place with the four sheet metal screws

provided. See Figures 32 and 33.

Note: The air starting collar extends through the ﬁreplace outer wrap. When the air starting collar is

securely attached, it will form a seal against the ﬁreplace wall.

4. Attach outside duct to starting collar with duct clamp or screws. See Figure 33.

DO NOT remove the
cover if the outside air
will not be connected.

ARNING

Figure 32 - Attaching Outside Air Starting Collar

and Insulation Ring to Left Side of Fireplace

Figure 33 - Attaching Outside Duct

to Starting Collar

Insulation Ring

AK-4 Starting

Collar

Sheet

Meal

Screws

Left Side of

Fireplace

Shorter End

of Air Starting

Collar

Air Starting

Collar

Duct

Screws

Left Side of

Fireplace

5. Cut a 6-inch diameter opening for model AK-4 in the outside

wall covering where the outside vent is to be located. See

Figure 34.

6. Select and cut a piece of duct long enough to attach to the

ﬁreplace and stick out at least 3" beyond the face of the wall

to which the AK-4 inlet air vent will be attached. Cut duct

with a standard pocket knife. See Figure 33.

Figure 34 - Combustion Air Assembly for

Model No. AK-4

Nail

Holes

Use FP-4 U duct for maximum efﬁciency
and safety. Do not use a combustible
duct. Always use UL Listed Class 0 or
1 duct material.

ARNING

6" Diameter

Hole

Duct

Extending

3"min.

AK-4 Inlet

Air Vent

Screw

Screws

Continued