Monessen Hearth Unvented Vent-Free Fireboxes BUF500 - Manual (Page 18)

18 61D1013
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 21.
8. Slip the exposed end of the duct over the starting collar on the fi replace.
9. Using the sheet metal screws provided, secure the duct end to the collar
attached to the fi replace.
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 duck clamp over the end of each duct. Tighten duct clamp down snuggly.
4. Push insulation back into place and over duct clamp.
Figure 21 - Installing Duct
Connector 403
Approximately
2"
Insulation
Duct
Connector
Duct Clamp
FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT