Installing Model 403 Duct Connector

Duct Clamp

Figure 23 - Installing Duct

Connector 403

USING OPTIONAL AK-4 OUTSIDE AIR KIT

MODEL AK-4 COMBUSTION AIR ASSEMBLY (CONTINUED)

7.If the duct is the insulated type, push the insulation back from one end of the duct approximately 2". See Figure 23.

8.Slip the exposed end of the duct over the starting collar on the ﬁreplace.

9.Using the sheet metal screws provided, secure the duct end to the collar attached to the ﬁreplace.

10.Nail or screw the combustion air assembly to the surface of the wall.

Note: If the wall covering is brick or stone, use appropriate masonry fasteners. If necessary, splice the duct. Use a model 403-duct connector to splice duct sections.

Approximately

Duct 2"

Connector

Insulation

1. Push insulation back approximately 2" from the end of each duct.

2.Slip each duct over duct connector until an equal length of connector extends into each duct.

3.Place duct clamp over the end of each duct. Tighten duct clamp down snuggly.

4.Push insulation back into place and over duct clamp.

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