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OPTIONAL OUTSIDE AIR KIT (MODEL AK4 / AK4F)
The installation of an outside air kit should be performed
during the rough framing of the fireplace due to the nature of
its location. Outside combustion air is accessed through a
vented crawl space (AK4F) or through a sidewall (AK4). See
page 10, figure 21 for instructions on how to operate the air
kit.
CHIMNEY PIPE
The DESA chimney system consists of 12, 18, 24, 36 and 48
inch, snap-lock double-wall pipe segments, planned for
maximum adaptability to individual site requirements. Actual
lengths gained after fitting overlaps must be taken into
consideration (lineal gain) and are given in the lineal gain
chart (see figure 5).
ASSEMBLY AND INSTALLATION OF THE DOUBLE
WALL CHIMNEY SYSTEM
Each double wall chimney section is consist of a galvanized
outer pipe, a stainless steel inner flue pipe and a wire spacer.
The pipe sections must be assembled independently as the
chimney is installed.
For Canada, use chimney parts designated “HT”
When connecting chimney directly to the fireplace, the inner
flue pipe section must be installed first with the lanced side
up. The outer pipe section can then be installed over the flue
pipe section with the hemmed end up.
Press down on each pipe section until the lances securely
engage the hem on the fireplace starter. The wire will assure
the proper spacing between the inner and outer pipe sections.
Continue to assemble chimney sections as outlined above,
making sure that both the inner and outer pipe sections are
locked together. When installing double wall “snap lock”
chimney together, it is important to assure the joint between
the chimney sections is locked. Check by pulling chimney
upward after locking. The chimney will not come apart if
properly locked. It is not necessary to add screws to keep the
chimney together (exception – see page 5 figure 8).
Figure 5 LINEAL GAIN
Figure 6
*TYPICAL OFFSET INSTALLATION
*For systems with two elbow sets, the minimum height is 22 feet. The maximum height for any system is 50 feet.
Figure 4 OUTSIDE AIR KIT
