Installation – Desa F48H(i)(R) User Manual

Page 6

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122272-01C

6

Figure 6 - Lineal Gain

LINEAL GAIN

PART NO.

DESCRIPTION

GAIN (IN)

48" Plantation

Fireplace

66

1

/

2

"

12-12DM

12-12HT

Pipe Section

10

5

/

8

"

18-12DM

18-12HT

Pipe Section

16

5

/

8

"

24-12DM

24-12HT

Pipe Section

23

5

/

8

"

36-12DM

36-12HT

Pipe Section

34

5

/

8

"

48-12DM

48-12HT

Pipe Section

46

5

/

8

"

RLT-12D

RLT-12HT

Round

Termination

7

3

/

4

"*

STL-12D

Square Chase-

Top with Slip

Section

7" to 15"*

* The lineal gain for the terminations is mea-
sured to the flue gas outlet height.

Hemmed
End

12

3

/

8

"

Stainless
Inner Pipe

15" Galvanized
Outer Pipe

ASSEMBLY AND INSTALLATION OF
DOUBLE WALL CHIMNEY SYSTEM

Each double wall chimney section consists of
a galvanized outer pipe, a stainless steel in-
ner flue pipe and a wire spacer. Pipe sections
must be assembled independently as chimney
is installed. When connecting chimney directly
to fireplace, inner flue pipe section must be
installed first with lanced side up. Outer pipe
section can then be installed over flue pipe
section with hemmed end up. Press down
on each pipe section until lances securely
engage hem on fireplace starter. Wire will
assure proper spacing between inner and
outer pipe sections.
Continue to assemble chimney sections as
outlined above, making sure both inner and
outer pipe sections are locked together. When
installing double wall snap-lock chimney to-
gether, it is important to assure joint between
chimney sections is locked. Check by pulling
chimney upward after locking. Chimney will
not come apart if properly locked. It is not
necessary to add screws to keep chimney
together (exception, see Figure 9, page 8).

Figure 5 - Outside Air Kit

Secure to Collars with Metal Tape, Screws
or Straps (Min. of 1/4" x 20" in size)

Air Inlet
Location
Must Allow
For Bushes
or Snow

Vent Hood
Required for
Wall Installation

Air Inlet
Eyebrow

Vented Crawl Space
(Check Local Codes
Before Installing in a
Vented Crawl Space)

CAUTION: Combustion air

inlet ducts shall not terminate

in attic space.

The maximum height for the

air vent can not exceed 3 feet

below the flue gas outlet of the

termination.

CHIMNEY PIPE

DESA Heating, LLC chimney system consists
of 12", 18", 24", 36"' and 48" 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 lineal gain chart (see Figure 6). Lineal
gain is the actual measurable length of a part
after two or more parts are connected. For
Canada, use chimney parts designated "HT".

WARNING: The opening in the

collar around the chimney at the

top of the fireplace must not be

obstructed. Never use blown insula-

tion to fill the chimney enclosure.

installation

Continued

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