Desa (V)368ST Quick start guide

For more information, visit www.desatech.com
SAVE THIS BOOK
This book is valuable. In addition to instructing you
on how to install and maintain your appliance, it also
contains information that will enable you to obtain re-
placement parts or accessory items when needed. Keep
it with your other important papers.

or for use with a vented gas log approved to ANS Z21.60,
Z21.84 or RGA 2-72 standards or for use with a vent-free
gas log heater approved to ANS Z21.11.2 standard.





etc.) should be contacted before installation to deter-
mine the need to obtain a permit.


SEE-THRU WOOD BURNING FIREBOX
OWNER’S OPERATION AND INSTALLATION MANUAL



www.desatech.com 55511E2
-

damage or loss of life. Refer to this manual for assis-
      
installer or local distributor.
TABLE OF CONTENTS
Safety .................................................................. 2
Product Dimensions ............................................ 3
Firebox Installation .............................................. 4
Venting Installation .............................................. 6
Optional Gas Line Installation............................ 12
Operation and Maintenance Guidelines ............ 13
Technical Service............................................... 14
Replacement and Accessory Parts.................... 14
SAFETY
c. Installation and/or operation in a
manner other than instructed in this
manual.
d. The burning of any other fuel not tested
or approved by DESA Heating, LLC in
this wood burning rebox.
Proper installation is the most important step
in ensuring safe and continuous operation
of the replace. Although grounding may not
be required by code in your area, it must be
electrically grounded in accordance with lo-
cal codes or, in the absence of local codes,
with the National Electrical Code, ANSI/NFPA
70-1990.
This rebox is intended for installation in ac-
cordance with the National Fire Protection As-
sociation Standard for Chimneys, Fireplaces,
Vents and Solid-Fuel Burning Fireplaces,
NFPA 211, and in accordance with codes
such as the BOCA Basic/National Code, the
Standard Mechanical Code, and the Uniform
Building Code.

-
less the manufacturer's instruc-


for use with the insert.

used as a substitute for a furnace

supplemental heat only.
   

This is a wood burning rebox intended and
approved for installation in either residential
homes or buildings of standard construction.
This rebox system requires the utilization of a
DESA Heating, LLC 8" double wall, snap-lock
ue pipe system.
Glass doors are optional with this rebox and
come in different styles. For more information
see Glass Doors, page 13).
The model’s serial number and any other
specic rating information may be found on
the rating plate located inside the rebox
opening.
Before beginning the installation of the rebox,
read these instructions through completely.
• This DESA Heating, LLC rebox and its
approved components are safe when
installed according to this installation
manual and operated as recommended
by DESA Heating, LLC. Use only DESA
Heating, LLC approved components,
which have been designed and tested
for the replace system. Failure to do this
may cause a re hazard.
• The DESA Heating, LLC warranty will be
voided by and DESA Heating, LLC dis-
claims any responsibility for the following
actions.
a. Modication of the rebox or any of
the components manufactured by
DESA Heating, LLC unless otherwise
permitted by DESA Heating, LLC.
b. Use of a rebox insert or any other
component part not approved by
DESA Heating, LLC in combination
with a DESA Heating, LLC rebox.

www.desatech.com
55511E 3
SAFETY
Continued

 


or any other appliance.
 
appliance should be located
     
furniture and draperies.
 

the appliance.
    -



doors fully opened or fully closed

    

only. When processed wood fuel

stir the logs while they are burn-

beenevaluatedfortheapplication
  
warnings and caution markings
on packaging prior to use.

should be alerted to the hazards of
high surface temperatures and to
stay away to avoid burns or cloth-

becarefullysupervisedwhenin the

Figure 1 - Dimensions
8" I.D.
LEFT SIDE
VIEW
FRONT VIEW
TOP VIEW
36 1/2"
20 1/2"
54"
24"
21 5/16"
42 5/8"
9 1/2"
19"
4 1/2"
12"
17 3/16"
7"
12"
24"
11 1/4"
10 1/4"
6"
37 1/2"
12 3/8"
O.D.
OUTSIDE AIR GAS LINE
16"
(40.6 cm)
1 1/2"
2 1/2"
15 1/2"
CONDUIT
(61 cm)
(15.2 cm)
(31.4 cm)
(20.3 cm) (6.4 cm)
(24.1 cm)
(108.3 cm)
(54.1 cm)
(39.4 cm)
(137.2 cm)
(52.1 cm)
(92.7cm)
(95.3 cm)
(61 cm)
(48.3 cm)
(11.4 cm)
(28.6 cm)
(30.5 cm)
(17.8 cm)
(26 cm)
(3.8 cm)
(30.4 cm)
(43.66 cm)
PRODUCT DIMENSIONS

www.desatech.com 55511E4
FIREBOX INSTALLATION
Figure 2 - Common Location of Fireplace


Back and sides of rebox 1" min.
Adjacent wall 12" min.
Chimney outer pipe surfaces 2" min.
Bottom of rebox to oor 0" min.
    
    -
lation or any other material.
-

  
material must not be in contact

*    
the opening where actual heat output
may occur.)

Woodwork such as wood trims, mantels or
any other combustible material projecting from
the front face must not be placed within 9" of
rebox effective opening.
Combustible materials above and projecting
more than 1 1/2" from the rebox front face
(see Figure 4, page 5) must not be placed less
than 12" from effective opening of the rebox
(NFPA STD 211, Sec. 7-3.3.3).
Mantels or any other combustible material
may also come up to the side edge of the
black metal face of the rebox only if the
projection from the front face falls within limits
shown in Figure 5, page 5.
Spacers on Sides of
Fireplace Provide
Required 1" (2.5cm)
Clearance
2" (5cm) Min. Clearance
From Pipe to
Combustibles
3" (7.6cm)
12" (30.4cm) Min. From Perpendicular
Side Wall to Fireplace Opening (Typ.)
Figure 3 - Firebox Clearances
Existing Wall
Projected Wall
12" (30.4 cm) to
Perpendicular Wall

To determine the safest and most efcient
location for the rebox, you must take into
consideration the following guidelines:
1. The location must allow for proper clear-
ances.
2. Consider a location where the heat output
will not be affected by drafts, air condition-
ing ducts, windows or doors.
3. A location that avoids the cutting of
joists or roof rafters will make installation
easier.
4. If an outside air kit is to be installed, ac-
cessibility to outside combustion air must
be considered. This can also be achieved
through a vented crawl space in some
cases (see Optional Outside Air Kit on
page 6).
5. Do not connect this rebox to a chimney
system other than a DESA Heating, LLC
chimney system.
6. Install in an area providing ventilation and
adequate combustion air.
7. Due to high temperatures, do not locate
this rebox in high trafc areas or near
furniture or draperies.
8. Provide adequate clearances around
air openings into combustion chamber.
NEVER obstruct front opening of rebox
or ow of combustion and ventilation air.
9. Do not locate in or near an area where
gasoline or other ammable liquids may
be stored. The rebox area must be kept
clear and free from these combustible
materials.
The typical installation for this replace is a
projected installation which allows you to ex-
tend the replace any distance into the room.
A projection may be ideal for a new addition
on an existing, nished wall.

www.desatech.com
55511E 5
12 3/8" Dia.
(31.4 cm) Outer Pipe
2" (5.1 cm) Min.
Clearance From Outer
Pipes to Combustibles
1" (2.5 cm) Min.
T o Combustibles
21 5/16"
(54 cm)
42 5/8"
(108 cm)
24"
(61 cm)
12"
(31 cm)
Figure 6 - Framing Clearances
Figure 7 - Framing Firebox with “Z” Type
Ember Protectors
FIREBOX INSTALLATION
Continued
As Required by Design as Long
as Ceiling Clearance Is Maintained
53
7
/
8
"
(136 cm) Min.
44
5
/
8
"
(113 cm)
Min.
Platform Must be
Solid, Flat and
Fully Supported
22
3
/
4
"
(58 cm)
"Z" Type
Ember Protector
(Not Supplied)
Figure 5 - Mantel Clearances to Metal
Face
Front
Face
Fireplace Front View
Fireplace Side View
3" Nom.
(7.6 cm)
9" Min.
(22.8 cm)
12" Min.
(30.4 cm)
33°
6" Nom.
(15.2 cm)
1 1/2" Max.
(3.8 cm)
Drywall
2" X 4" Stud
Combustible
Materials
Figure 4 - Mantel Clearances to
Combustible Materials
Seal Gaps with
Noncombustible
Mortar or Adhesive
T o p View of Fireplace
Drywall
4"
(Approx.)
(10.1 cm) 33°
Nom.
6" Nom.
(15.2 cm)
4 3/8"
Min.
(11.1 cm)
Combustible
Material Must
Not Overlap
Black Metal
Front Face
2 3/4" Max.
(6.98 cm)
FRAMING
1. Frame the opening for the rebox using
the dimensions shown in Figures 6 and 7
depending on your installation.
2. If rebox is to be installed directly on
carpeting, tile (other than ceramic) or any
combustible material other than wood
ooring, rebox must be installed upon a
metal or wood panel extending full width
and depth of rebox.
Figure 8 - Ember Protectors
3. Set rebox directly in front of opening and
slide unit back until nailing anges touch
side framing.
4. Check the level of rebox and shim with
sheet metal if necessary.
5. Before securing rebox to prepared fram-
ing, ember protector (provided) must be
placed between hearth extension (not
supplied) and under bottom front edge of
rebox to protect against glowing embers
(see Figure 8 and Hearth Extensions on
page 6). If rebox is to be installed on a
raised platform, a Z-type ember protector
(not supplied) must be fabricated to t
your required platform height (see Figure
7). The ember protector should be made
of galvanized sheet metal (28 gauge mini-
mum) to prevent corrosion.
6. Secure firebox to framing at nailing
anges located on sides of rebox (see
Figure 9, page 6).
Ember
Protector
(Typ. 2 of 2)
1/2"
(1.2 cm)
Max.

www.desatech.com 55511E6
FIREBOX INSTALLATION
Continued
VENTING INSTALLATION

The installation of an outside air kit should be per-
formed during the rough framing of the rebox due
to the nature of it’s location. Outside combustion air
is accessed through and exterior wall or a vented
crawl space (see Figure 12, page 7).
    
must not terminate in attic
space.
    
      

termination.
Avoid installing outside air eyebrow in areas
where inlet opening may be blocked by snow,
bushes or other obstacles. It should also be
located beyond the reach of small children.
For further details on installation of outside air
kit, please refer to instructions included with
air kit. For operating instructions, please refer
to your owner's manual.
8" Max.
“K” Facto
r
.84
1 1/2" Typ.
1 1/2" Typ.
Noncombustible
Hearth
Extension
“Z” Type Ember
Protector
Noncombustible
Hearth Extension
Ember Protector
Figure 11 - Raised Hearth Extension
Figure 9 - Nailing Flanges
Nailing
Flanges
Prepared
Framing Nails or
Screws
1/2" (1.27 cm)
Minimum to
Combustibles
HEARTH EXTENSION
A hearth extension projecting a minimum of
16" in front of and a minimum of 8" beyond
each side of the rebox opening is required to
protect combustible oor construction in front
of rebox (see Figure 10). Fabricate a hearth
extension using a material which meets the
following specications: a layer of noncom-
bustible, inorganic material having a thermal
conductivity of K=0.84 BTU IN/FT, HR. F (or
less) at 1" thick. For example, if the material
selected has a K factor of 0.25, such as glass
ber, the following formula would apply:
0.25 x 1.0" = 0.30" thickness required
0.84
NONCOMBUSTIBLE
HEARTH EXTENSION
52
1
/
2
" MIN.
(133.3cm)
36
1
/
2
" MIN.
(92.7cm)
8" MIN.
(20.3cm)
16" MIN.
(40.6cm)
Figure 10 - Hearth Extension
Thermal conductivity "K" of materials can be
obtained from manufacturer or supplier of
noncombustible material.
If hearth extension is to be raised, a “Z” type
ember protector must be used (see Figure 7,
page 5, and Figure 11)

www.desatech.com
55511E 7
Figure 13 - Pipe Connection

  GAIN
368STM See-Through 66 1/4 "
V368ST See-Through 54 "
(V)12-8DM Flue Pipe 10 5/8 "
(V)18-8DM Flue Pipe 16 5/8 "
(V)24-8DM Flue Pipe 23 5/8 "
(V)36-8DM Flue Pipe 34 5/8 "
(V)48-8DM Flue Pipe 46 5/8 "
VRTL-8DM
VRTTL-8DM
Round Top
Termination 6"
VETL-8M
VETO-8DM
VETLO-8DM
Econo-Top
Termination 1
" to 12"
Hemmed
End
8" Stainless
Inner Pipe
Lanced Side
Up
12 3/8" Galvanized
Outer Pipe
Figure 12 - Outside Air Kit Installation
Secure to Collars with
Duct Tape or Screws
Air Inlet
Location
Must Allow
For Bushes
or Snow
Vent Hood
Required for
Wall Installation
Air Inlet
Termination
Vented Crawl Space
(Check Local Codes
Before Installing in a
Vented Crawl Space)

The DESA Heating, LLC chimney system is
a snap-lock, double-wall pipe. It consists of a
stainless steel inner ue pipe(s), a galvanized
outer pipe and a wire spacer. Each section of
pipe comes in lengths of 12", 18", 36" and 48".
The actual lineal gain for each is measured
after each section is fully connected. Lineal
gain is the actual measurable length of a part
after two or more parts are connected.

The pipe sections must be assembled indepen-
dently as the chimney is installed. When connect-
ing chimney directly to the rebox, the inner ue
VENTING INSTALLATION
Continued
where the chimney penetrates a oor or ceil-
ing joist space. Their purpose is to establish
and maintain the required clearance between
the chimney and the combustible materials.
When penetrating a oor or ceiling at an angle,
use restop spacer number V30FS-8DM (see
Replacement and Accessory Parts, page 14).
When the pipe passes through a framed open-
ing into a living space above, the restop must
be placed onto the ceiling from below as shown
in Figure 14, page 8. When the pipe passes
through a framed opening into an attic space
above, the restop must be placed on the attic
oor as shown in Figure 15, page 8.

The chimney support section is a 4" strap
pipe section must be installed rst with the lanced
side up. The outer pipe section can then be in-
stalled over the ue pipe section with the hemmed
end up. Press down on each pipe section until the
lances securely engage the hem on the rebox
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
(see Figure 13). 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.
  

Firestop spacers are required at each point

collararoundthechimneyatthe top
-
ed. Never use blown insulation to


www.desatech.com 55511E8
2" (5.1cm)
Minimum
VENTING INSTALLATION
Continued
Figure 17 - Chimney Supports
Straps
OFFSET RISE 
A B 48"  18" 12"
4
3
/
8
" 16
3
/
8
"
9
1
/
2
" 25
1
/
4
" 1
12
1
/
2
"30
3
/
8
" 1
14
3
/
8
" 34" 2
17
5
/
8
" 39
1
/
4
" 1 1
21
1
/
2
" 46" 1
22
3
/
4
" 48
1
/
8
" 1 2
26
3
/
8
" 54
7
/
8
" 1
26
3
/
8
"60" 1 1
31
3
/
4
" 63
3
/
4
" 1 1
34
3
/
4
" 69" 1 1
38
5
/
8
" 75
5
/
8
" 2
39
7
/
8
" 77
7
/
8
" 1 1 1
43
3
/
4
" 84
1
/
2
" 1 1
46
3
/
4
" 87
3
/
4
" 2 1
48
7
/
8
" 93
3
/
8
" 2
Figure 18 - Rise and Offset
B
A
Screws
Figure 14 - Firestop Spacer with Living
Space Above Ceiling
Figure 15 - Firestop Spacer with Attic
Space Above Ceiling
Existing
Ceiling
Frame
Firestop
Spacer
Screws or
Staples
(Min. of 8)
Firestop
Spacer
Screws or Staples
(Min. of 8)
Existing
Ceiling
Frame
2" (5.1cm)
Minimum
Angled Firestop
Ceiling
Support
Return
Elbow
30 FT.
(9.14m)
30 FT.
(9.14m)
Figure 16 - Elbow Offset
Return
Elbow
12S-8DM
Support
Required
and 12" length of pipe. A chimney support is
required every 30 feet above replace after a
straight chimney run or above a return elbow
after a straight chimney run (see Figure 16).
This support is designed to relieve the extra
weight load on rebox and elbows when high
chimneys are installed.

Chimney weight above offset rests on return
elbow. Straps must be securely nailed to
rafters or joists (see Figure 17).
To achieve desired offset, you may install
combinations of 12", 18", 36" and 48" length
of double wall pipe (see offset chart and
Figure 18).
Maximum length of pipe between supports

www.desatech.com
55511E 9
TYPICAL OFFSET INSTALLATIONS
OFFSET
ELBOW
OFFSET
ELBOW
RETURN
ELBOW
OFFSET
ELBOW
RETURN
ELBOW
RETURN
ELBOW
RETURN
ELBOW
CEILING
SUPPORT
PIPE
V12S-8DM
6' MAX
(15.2cm)
6' MAX
(15.2cm)
6' MAX
(15.2cm)
6' MAX
(15.2cm)
6' MAX
(15.2cm)
6' MAX
(15.2cm)
MINIMUM
HEIGHT
15 FT.
(4.5m)
MAXIMUM
HEIGHT
CHASE
TERMINATION
40 FT.
(12m)
VENTING INSTALLATION
Continued
Figure 19 - Typical Offset Installations
Figure 20 - 10 Foot Rule
Figure 21 - Maximum Chimney Height
Storm
Collar
Flashing
Firestop
Spacer
VRTL-8DM VRTL-8DM VETL-8DM

All chimney terminations must extend a mini-
mum of 3 feet above the highest point where it
passes through the roof and must be at least 2
feet above roof with a 10 foot horizontal span
(see Figure 20).
IMPORTANT: If an exposed portion of chim-
ney is greater than 4 feet above the roof line,
use support wires to keep chimney secure.
Support wires may be attached to outer pipe
of chimney with screws, if screws do not
penetrate inner ue pipe.

HEIGHT
The minimum height of the chimney (mea-
sured from the base of the replace to the ue
gas outlet-end of pipe) is 16 feet for a straight
is 6 feet of angled run. A maximum of two 6
feet angled run sections per chimney system
(see Figure 19).
run, 16 feet minimum for a run with 1 elbow set
and 25 feet minimum for a run with 2 elbow
sets. (A set consists of one starter elbow and
one return elbow.)
Uncommon circumstances such as neigh-
boring hills, tall trees, or strong wind areas
can cause down drafts in chimney system.
In such cases, going beyond the minimum
recommended height would be preferable to
provide a better draw.
The replace height approved for any chimney
run with this replace system is 40 feet mea-
sured from bottom of rebox to ue outlet-end
of pipe (see Figure 21).

www.desatech.com 55511E10
VENTING INSTALLATION
Continued
Nail Only
Outer
Perimeter
of Flashing
Storm
Collar
Flashing
Cone
Underlap
Shingles
at Bottom
Overlap
Shingles Top
and Sides Only
Figure 23 - Flashing Installation

To maintain a 1" clearance to pipe on a roof with
a pitch, a rectangular opening must be cut.
1. Determine the center point through which
pipe will penetrate roof.
2. Determine center point of roof. Pitch is the
distance the roof drops over a given span,
usually 12". A 6/12 pitch means that the
roof drops 6" for each 12" one measure
horizontally down from roof rafters.
3. Use roof opening chart (Figure 22) to
determine correct opening length and
ashing required.
4. Remove shingles around opening mea-
sured. Cut out this section.
5. Add next sections of pipe until end
penetrates roof line. Check to see that
proper clearances are maintained. Extend
chimney by adding sections of double wall
pipe until pipe is minimum of 30" above
highest point of roof cutout. Termination
and chimney must extend a minimum of
36" above highest point where it passes
through the roof (see 10-Foot Rule and
Figure 20, page 9.
Figure 24 - Storm Collar
Chimney
Pipe
Waterproof
Caulk
Storm
Collar Flashing

Determine ashing to be used with roof open-
ing chart. Slide ashing over pipe until base
is at against roof. Replace as many shingles
as needed to cover exposed area and ashing
base. Secure in position by nailing through
shingles (see Figure 23).   


Place storm collar over pipe and slide down
until it is snug against the open edge of the
ashing (see Figure 24). Apply waterproof
caulking to all seams and notches around
storm and also at base around shingles.
 Slope Opening


Model No.
Flat 0° 19" V6F-8DM
0-6/12 26.6° 23.25" V6F-8DM
6/12-12/12 45° 30.75" V12F-8DM
Figure 22 - Roof Opening Measurements
Opening
“A”
19" Min.
(48.26cm)
30" Min.
(76.2cm)
2" Min.
(5.08cm)
2" Min.
(5.08cm)
2" Min.
(5.08cm)
TERMINATIONS
The rebox system must be terminated with
the listed round top or chase terminations. In
any case, refer to the installation instructions
supplied with the termination.
Terminations approved for this replace are
VRTL-8DM and VRTTL-8DM, which can be
used for ashing or chase and VETO-8DM
and VETLO-8DM for chase style termination
only. Figure 25, page 11, shows a VRTL-8DM
round top termination.
-

installationinstructions provided
with termination being used.