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MODEL AK-4 COMbUStIOn AIR ASSEMbLy
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.
INSTALLING MODEL 403 DUCT CONNECTOR
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.
26D4751
USInG OptIOnAL AK-4 OUtSIDE AIR KIt
(CONtINueD)
Approximately
"
Duct
Connector
Duct Clamp
Figure 23 - Installing Duct
Connector 403
Insulation
17
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