Martin Fireplaces 400BWBIA - Manual (Page 19)

61D0008 19
INSTALLING CHIMNEY SUPPORTS
Note: For a total fireplace installation of more
that 30' feet, you must use chimney
support model SCS at or below 30'
to support the weight of additional
chimney pipe.
To install the chimney support, place the crimped end of
the flue and outlet air duct portions into the last section
of chimney pipe. Push down until the outside of inlet
air duct of the chimney support overlaps and snap locks
the chimney support into the chimney section.
Nail the support straps tightly to a building frame
member or ceiling joist as shown by Figure 20. Use at
least two (2) 8-penny nails per strap.
Figure 20 - Installing Chimney Supports
Outer Pipe
Flue
Support
Straps
(Fasten Securely)
Firestop
Snap-Lock
Chimney Support
Securely to Lower
Pipes before
Fastening Support
Straps
Chimney
Support
CHIIMNEY INSTALLATION
ELBOW INSTALLATION
The following are important points that should be observed when installing elbows on the fireplace.
1. Securely nail down to the surrounding structure support straps of all elbows not installed directly on top of the fireplace.
This allows the support strap to carry the weight of the chimney above the elbow and prevents this weight from breaking
the elbow or chimney sections apart.
2. Do not use elbows in any combination that inclines the chimney more than 30° from vertical. See Figure 21.
Air Inlet Pipe
Flue Pipe 30° Elbow
Figure 21 - Elbow Supports