Model 403 Duct Connector - Vermont Castings BUF400 Installation & Operating Instruction

BUF Vent-Free Fireboxes
7. If the duct is the insulated type, push the insulation back
from one end of the duct approximately 2". Figure 18
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.
INSTALL 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.
14
Duct
Connector
Figure 18 -
Install Duct Connector 403
FP1907
Duct connector
8/08
COMBUSTION AIR
Insulation
Approximately
2"
Duct
Duct Clamp
FP1907
61D1013