Desa VPN36 3-SIDED - Manual (Page 8)

8 55505
10" (254 mm)
STAINLESS
INNER PIPE
LANCED SIDE UP
15" (381 mm)
DIA. GALVANIZED
OUTER PIPE
HEMMED
END
Figure 15
It is important to assure that the joint between the chimney sections
is fully locked. Check by pulling chimney upward after locking.
The chimney should not come apart if properly locked. It is not
necessary to add screws to keep vertical or angled chimney runs
together.
WARNING: THE OPENINGS AROUND THE START-
ING COLLAR ON TOP OF THE FIREBOX MUST NEVER
BE OBSTRUCTED. NEVER USE BLOWN INSULA-
TION TO FILL THE CHIMNEY ENCLOSURE.
FIREBOX SPACER
Firebox spacers are required at each point where the chimney
penetrates a floor or ceiling, joist space. Their purpose is two fold;
they establish and maintain the required clearance between the outer
pipe and combustible materials, and they also serve as a shield
between floors as required by most codes.
When the pipe passes through a framed opening into a living space
above, a firestop must be placed on the ceiling below (Figure 16).
Figure 16
When the pipe passes through a framed opening into an attic space
above, a firestop must be placed on the attic floor above (Figure 17).
LIVING SPACE
ABOVE CEILING
EXISTING CEILING
FRAME
FIRESTOP SPACER
SCREW
(TYP. OF 8)
Figure 17
ATTIC SPACE
ABOVE CEILING
EXISTING CEILING
FRAME
FIRESTOP
SPACER
SCREW
(TYP. OF 8)
SUPPORT SECTIONS
The chimney support section is a 4 strap, 12-inch length of pipe. A
chimney support is required every 30 feet above the firebox after
a straight chimney run, or above a return elbow after a straight
chimney run (Figure 18).
This support is designed to relieve the extra weight load on the
firebox and elbows when high chimneys are installed.
Figure 18
V12S-10DM
SUPPORT
REQUIRED
30 FT.
(9.14m)
30 FT.
(9.14m)
RETURN
ELBOW
Figure 19
RETURN
ELBOW
ANGLE
FIRESTOP
CEILING SUPPORT
PIPE V12S-10DM
STRAPS
2" (50.8mm)
MINIMUM
ELBOW OFFSET INSTALLATION
Chimney weight above offset rests on return elbow. Straps must be
secured with nails to rafters or joists (see Figure 19).