Desa (V)GM36 User manual

DESA
2701 INDUSTRIAL DRIVE P/N 112435-01
P.O. BOX 90024 REV K
BOWLING GREEN, KY 42101-9004 07/05
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
replacement parts or accessory items when needed.
Keep it with your other important papers.
This fireplace is approved for use as a wood burning
fireplace 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.
WARNING: Always leave glass doors fully
opened or fully closed when operating this fireplace.
(V)GM36 36” wood burning masonry fireplace with insulation
(V)GM42 42” wood burning masonry fireplace with insulation
(V)GM42H 42” wood burning herringbone masonry fireplace
with insulation
(V)GM50 50” wood burning masonry fireplace with insulation
(V)GM50H 50” wood burning herringbone masonry fireplace
with insulation
INSTALLATION
INSTRUCTIONS
OMNI Test Laboratories
PATENT
PENDING

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CONTENTS
1. SPECIFICATIONS ------------------------------------------------------------- PG. 1-3
2. INTRODUCTION / SELECTING LOCATION ------------------------------------------------------------- PG. 4
3. MINIMUM CLEARANCES ------------------------------------------------------------- PG. 4
4. FRAMING AND INSTALLING ------------------------------------------------------------- PG. 5
5. HEARTH EXTENSION ------------------------------------------------------------- PG. 5
6. OUTSIDE AIR KIT INSTALLATION ------------------------------------------------------------- PG. 6
7. LINEAL GAIN ------------------------------------------------------------- PG. 6
8. CHIMNEY PIPE AND OFFSET INSTALLATION ------------------------------------------------------------- PG. 6-7
9. FIRESTOP SPACERS ------------------------------------------------------------- PG. 7
10. FLASHING AND TERMINATION ------------------------------------------------------------- PG. 8-9
11. MANTEL CLEARANCE ------------------------------------------------------------- PG. 9-10
12. FINISHING YOUR FIREPLACE ------------------------------------------------------------- PG. 10
13. OPTIONAL GLASS DOORS ------------------------------------------------------------- PG. 10
14. GAS LINE INSTALLATIONS ------------------------------------------------------------- PG.10-11
15. DAMPER OPERATION / TECH SERVICE ------------------------------------------------------------- PG. 12
16. BRICK INSTALLATION ------------------------------------------------------------- PG. 13-23
GROUT MIXTURE/APPLICATION
BRICK MATRIX
17. GLASS DOOR INSTALLATION ------------------------------------------------------------- PG. 24-25
18. REPLACEMENT AND TECHNICAL PARTS ------------------------------------------------------------- PG. 26

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SPECIFICATIONS
50” MODEL
ALL DIMENSIONS IN THIS MANUAL ARE IN INCHES UNLESS OTHERWISE SPECIFIED.

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SPECIFICATIONS
42” MODEL
ALL DIMENSIONS IN THIS MANUAL ARE IN INCHES UNLESS OTHERWISE SPECIFIED.

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SPECIFICATIONS
36” MODEL
ALL DIMENSIONS IN THIS MANUAL ARE IN INCHES UNLESS OTHERWISE SPECIFIED.

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INTRODUCTION
BEFORE BEGINNING THE INSTALLATION OF THE
FIREPLACE, READ THESE INSTRUCTIONS THROUGH,
COMPLETELY.
♦This DESA fireplace and its components are safe
when installed according to this installation manual.
Unless you use DESA components, which has been
designed and tested for the fireplace system, you may
cause a fire hazard.
♦The DESA warranty will be voided by and DESA
disclaims any responsibility for the following actions:
a) Modification of the fireplace, components, doors,
air inlet system and damper control.
b) Use of any component part not manufactured or
approved by DESA in combination with a DESA
fireplace system.
PROPER INSTALLATION is the most important step in
ensuring safe and continuous operation of the fireplace.
Consult the local building codes as to the particular
requirements concerned with the installation of all factory
built fireplaces.
USE SOLID WOOD OR PROCESSED SOLID FUEL
FIRELOGS ONLY.
This fireplace is not intended to be used as a substitute for
a furnace to heat an entire home. Use for supplemental
heat only.
SELECTING LOCATION
To determine the safest and most efficient location for the
fireplace, you must take into consideration the following
guidelines:
1.) The location must allow for proper clearances (see
figures 1 & 2).
2.) Consider a location were the fireplace would not be
affected by drafts, air conditioning ducts, windows or
doors.
3.) A location that avoids the cutting of joists or roof
rafters will make installation easier.
4.) An outside air kit is available with this fireplace. For
more details refer to section on outside air kit
installation on page 5.
MINIMUM CLEARANCES TO COMBUSTIBLES
•Back and side of fireplace -------------- 1-1/2” minimum
Note: The 1-1/2” clearance not required at the nailing flanges
•Front of fireplace ------------------------ 48” minimum
•Floor* ------------------------------------- 0” minimum
*See step 2 of “Installing the Fireplace” on page 3
•Perpendicular Wall to Opening of unit - 18” minimum
12” – GM36
•Top Spacers ------------------------------ 0” minimum
•Mantel Clearances --------------- see page 8 “Mantels”
•Chimney Outer Pipe Surfaces --------- 2” minimum
1” – GM36
MINIMUM / MAXIMUM CHIMNEY HEIGHT
The minimum height of the chimney, measured from the base
of the fireplace to the flue gas outlet of the termination, is 16
feet for straight flue or a flue with one elbow set. The
maximum distance between elbows is 6 feet. For systems
with two elbow sets, the minimum height is 22 feet. The
maximum height of any system is 50 feet. This measurement
includes the fireplace, chimney sections and the height of the
termination assembly at the level of the flue gas outlet (see
page 8, figure 14).
FOR YOUR SAFETY
•Do not store or use gasoline or any other flammable
vapors or liquids in the vicinity of this or any other
appliance.
•Due to high temperatures, the appliance should be
located out of traffic and away from furniture and
draperies.
•Do not place clothing or other flammable materials on
or near the appliance.
•NEVER leave children unattended when a fire is
burning in the fireplace.
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause injury,
property damage, or loss of life. Refer to this manual for
assistance or additional information. Consult a qualified
installer or local distributor.
CHECK LOCAL CODES BEFORE
INSTALLING THIS FIREPLACE.
WARNING: Do not install a fireplace insert in this
box unless the manufacturers instructions with the insert
specifically state this fireplace has been tested for use
with the insert.
This wood burning fireplace complies with UL 127-
CAN/ULS-S610-M87 standard as a FACTORY BUILT
FIREPLACE.
WARNING: Do not pack required air spaces with
insulation or other materials.
FOR CANADA: The authority having jurisdiction (such
as the municipal building department, fire department,
etc.) should be contacted before installation to determine
the need to obtain a permit.
WARNING: When processed wood fuel fire logs
are used, do not poke or stir the logs while they are
burning. Use only fire logs that have been evaluated for
the application in fireplace and refer to fire log warnings
and caution markings on packaging prior to use.

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FRAMING AND INSTALLING THE FIREPLACE
STEP 1: Frame the opening for the fireplace using the
dimensions shown in figures 1 & 2.
STEP 2: If the fireplace is to be installed directly on carpeting,
tile (other than ceramic), or any combustible material other
than wood flooring, the fireplace must be installed upon a
metal or wood panel extending the full width and depth of the
fireplace.
STEP 3: Set the fireplace directly in front of this opening and
slide the unit back until the nailing flanges touch the side
framing.
STEP 4: Check the level of the fireplace and shim with sheet
metal if necessary.
STEP 5: Before securing fireplace to prepared framing, the
ember protector (provided), must be placed between the hearth
extension (not supplied), and under the bottom front edge of
the fireplace to protect against glowing embers falling
through. If the fireplace is to be installed on a raised platform,
a Z-type ember protector (not supplied) must be fabricated to
fit your required platform height. The ember protector should
extend under the fireplace a minimum of 1 - 1/2”. The ember
protector should be made of galvanized sheet metal (28-gage
minimum) to prevent corrosion.
STEP 6: Using screws or nails, secure the fireplace to the
framing through flanges located on the sides of the fireplace.
HEARTH EXTENSION
A hearth extension projecting a minimum of 20” in front of
and a minimum of 12” beyond each side of the fireplace
opening is required to protect combustible floor construction
in front of the fireplace. Fabricate a hearth extension using a
material which meets the following specifications: a layer of
non-combustible, 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 fiber, the following formula would apply:
Thermal conductivity “K” of materials can be obtained from
the manufacturer or supplier of the non-combustible material.
If the hearth extension is to be covered, use non-combustible
material such as tile, slate, brick, concrete, metal, glass,
marble, stone etc. Provide a means to prevent the hearth
extension from shifting and seal gap between the fireplace
frame and hearth extension with a non--combustible material
(see figure 3).
WARNING: Hearth extension is to be installed only
as illustrated.
0.25 x 1.0” = 0.30 thickness required
0.84
Figure 3 HEARTH EXTENSION
Figure 1 FRAMING DIMENSION
Figure 2 CORNER INSTALLATION

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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, fig. 22 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).
For Canada, use chimney parts designated “HT”
ASSEMBLY AND INSTALLATION OF THE DOUBLE
WALL CHIMNEY SYSTEM
Each double wall chimney section consists 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. 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 6 figure 8).
INSTRUCTIONS WHEN ELBOW OFFSET (30E-12DM)
OF CHIMNEY IS NEEDED
1. To achieve desired offset, you may install combinations
of 12”, 18”, 24”, 36” and 48” length of double wall pipe
(see single offset chart and figure 6).
2. Chimney weight above offset rests on return elbow.
Straps must be securely nailed to rafters or joists (see
figure 7, details a & b).
3. Maximum length of pipe between supports (return elbow
or 12S-12DM) is 6’ of angle run. Maximum of two (2) 6’
angle run sections per chimney system (see figure 6).
OFFSET CHART (22-50 FT. SYSTEM HEIGHT)
WARNING: The opening in the collar around the
chimney at the top of the fireplace must not be obstructed.
N
ever use blown insulation to fill the chimne
y
enclosure.
Figure 4 OUTSIDE AIR KIT
OFFSET RISE
A
B 48" 36" 24" 18" 12"
4 - 3/8 16 -3/8
9 - 3/4 25 - 1/2 1
12 - 3/4 30 - 3/4 1
15 34 - 3/4 1
18 40 1 1
21 - 1/4 46 - 1/4 1
23 - 3/4 49 - 1/4 1 1
27 - 3/4 56 - 3/4 1
30 60 - 3/4 1 1
33 66 1 1
36 71 1 1
38 - 1/4 75 2
41 - 1/4 80 - 1/4 1 1 1
45 86 - 3/4 2
46 - 3/4 89 - 1/2 1 1 1
51 97 1 1
53 - 1/4 101 2 1
56 - 1/4 106 - 1/4 2
59 - 1/4 111 - 1/2 1 1 1
61 - 3/4 115 - 1/2 2 1
64 - 3/4 120 - 3/4 2 1
68 - 1/4 127 1 2
70 130 2 1 1
74 - 1/4 137 - 1/2 1 2 1
76 - 3/4 141 - 1/2 1 2 1
79 - 3/4 146 - 3/4 4
ELBOW SET ONLY
CHIMNEY LENGTH
CAUTION: Combustion air inlet ducts shall not terminate
in attic space.
Figure 5 LINEAL GAIN

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FIRESTOP SPACERS (FS-10, 1100EFS-10DM FOR
GM36)
Firestop spacers are required at each point where the chimney
penetrates a floor space. Their purpose is to establish and
maintain the required clearance between the chimney and the
combustible materials. When the pipe passes through a
framed opening into a living space above, the firestop must be
placed onto the ceiling from below as shown in figure 9.
They also provide complete separation from one floor space to
another or attic space as required by most codes. When the
double wall pipe passes through a framed opening into an attic
space, the firestop must be placed into an attic floor as shown
in figure 10.
PENETRATING THE ROOF
Figure 8 ELBOW OFFSET
All pipe connections between the offset and return
must be secured with two screws, only on the outer
pipe, and shall not penetrate the inner stainless.
Figure 9 FIRESTOP SPACER
Figure 10 FIRESTOP SPACER
*For systems with two elbow sets, the minimum height is 22 feet. The maximum height for any system is 50 feet.
Fi
g
ure 6 *TYPICAL OFFSET TERMINATION
Figure 7 CEILING SUPPORT PIPE

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PENETRATING THE ROOF
To maintain a 1” (GM36) or 2” (GM42/GM50) clearance to
the pipe on a roof with a pitch, a rectangular opening must be
cut.
STEP 1: Determine the center point through which the pipe
will penetrate the roof.
STEP 2: Determine the center point of the roof. Pitch is the
distance the roof drops over a given span, usually 12 inches.
A 6/12 pitch means that the roof drops 6 inches for each 12
inches one measure horizontally down from the roof rafters.
STEP 3: Use the roof opening chart (figure 11) to determine
the correct opening length and flashing required.
STEP 4: Remove the shingles around the opening measured
and cut out this section.
STEP 5: Add the next sections of the pipe until the end
penetrates the roofline. Check to see that the proper
clearances are maintained. Extend chimney by adding
sections of double wall pipe until pipe is a minimum of 30
inches above the highest point of the roof cutout. Termination
and chimney must extend a minimum of 36 inches above the
highest point where it passes through roof.
FLASHING INSTALLATION
(V6F-10DM or V12F-10DM)
FLASHING INSTALLATION
(V6F-10DM or V12F-10DM)
Determine the flashing to be used with the roof opening chart.
Slide flashing over pipe until base is flat against roof. Replace
as many shingles as needed to cover exposed area and flashing
base. Secure in position by nailing through shingles (see
figure 12).
DO NOT NAIL THROUGH FLASHING CONE.
INSTALLING FLASHING ON A METAL ROOF
When installing the flashing on a metal roof, it is required that
putty tape be used between the flashing and the roof. The
flashing must be secured to the roof using #8 x ¾” screws and
then sealed with roof coating to prevent leakage through the
screw holes. A roof coating must also be applied around the
perimeter of the flashing to provide a proper seal
.
STORM COLLAR INSTALLATION (SC2-1)
Place storm collar over pipe and slide down until it is snug
against the open edge of the flashing (see figure 13). Apply
waterproof caulk around the perimeter of the collar to provide
a proper seal.
TERMINATIONS / SPARK ARRESTOR
The fireplace system must be terminated with the listed round
top or chase terminations. In any case, refer to the installation
instructions supplied with the termination.
Figure 12 FLASHING INSTALLATION
Figure 13 STORM COLLAR
Fi
g
ure 11 ROOF OPENING CHART – GM36
(degrees) (inches) MODEL NO.
FLAT 0 17 V6F-10DM
0 - 6/12 26.6 19 V6F-10DM
6/12 - 12/12 45.0 24 V12F-10D
M
PITCH SLOPE OPENING "A" MAX USE FLASHING
(degrees) (inches) MODEL NO.
FLAT 0 19.5 V6F-10DM
0 - 6/12 26.6 22 V6F-10DM
6/12 - 12/12 45.0 27 V12F-10DM
Figure 11B ROOF OPENING CHART – GM42/50

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CHASE INSTALLATIONS
Instructions for chase installations are included with the chase
style termination chosen. In a multiple chase installation, be
sure to provide adequate distance between terminations to
prevent smoke spillage from one termination to another. We
suggest that terminations be separated at least 24 inches,
center to center and stacked at vertical height difference of 18
inches (see figure 15).
*NOTE: If a decorative shroud is to be installed, contact the
manufacturer for specifications.
10-FOOT RULE
All flue gas outlet of chimney termination must extend a
minimum of 3 feet in height above the highest point where it
passes through the roof and must be at least 2 feet above the
highest point of the roof that is within a horizontal distance of
10 feet (see figure 16).
MANTELS
A mantel may be installed if desired (see figure 17),
Woodwork such as wood trims, mantels, or any other
combustible material projecting from the front face must not
be placed within 12 inches (GM36) or 18 inches (GM42/50)
of the fireplace opening. Combustible materials above 12
inches (GM36) or 18 inches (GM42/50) and projecting more
than 1-1/2 inches from the fireplace must not be placed less
than 15 inches (GM36) or 21 inches (GM42/50) from the top
opening of the fireplace (NFPA STD 211, Sec. 7-3.3.3).
Figure 15 MULTIPLE CHASE INSTALLATION
Figure 16 10-FOOT RULE
CAUTION: Do not seal openings on the rooftop flashing.
Follow the installation instructions provided with the
termination bein
g
used.
Fi
g
ure 17 MANTEL CLEARANCE – GM36
Figure 14 TERMINATION
Figure 17A MANTEL CLEARANCE – GM42/50

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Mantels or any other combustible material also may come up
to the side edge of the black metal face of the fireplace just as
long as the projection from the front face fall within the limit
shown in figure 17a.
FINISHING THE FIREPLACE
Combustible materials, such as wallboard, gypsum board,
sheet rock, drywall, plywood, etc. may make direct contact
with sides and top periphery of the fireplace face. It is
important that combustible materials do not overlap the face
itself. Brick, glass, tile or other non-combustible materials
may overlap the front face provided they do not obstruct
essential openings like louvered slots or any other opening.
When overlapping with a non-combustible facing material,
use only non-combustible mortar or adhesive.
OPERATING GUIDELINES AND MAINTENANCE
INSTRUCTIONS
GLASS DOORS
Glass doors are optional with the fireplace. When the
fireplace is in operation, doors must in FULLY OPENED or
FULLY CLOSED position only or a fire hazard may be
created (see figure 18).
A fireplace equipped with glass doors operates much
differently than a fireplace with an open front. A fireplace
with glass doors has a limited amount of air for combustion.
Excessive heat within the fireplace can result if too large a fire
is built or if the combustion air gate is not completely open.
The following tips should be followed to assure that both the
fireplace and the glass door retain their beauty and function
properly. Both the flue damper and the glass doors must be
fully opened before starting the fire. This will provide
sufficient combustion air and maintain safe temperatures in
the firebox.
IMPORTANT: The glass must be allowed to warm slowly
and evenly. The tempered glass will withstand a gradual
temperature rise to 550 degrees Fahrenheit, which is more
than a normal fire will generate. Such materials as pitch/wax
laden logs, very dry mill end lumber, and large amounts of
paper or cardboard boxes can create an excessively hot fire
and should not be burned in this fireplace. Always keep the
fire well back from the doors and never allow flames to
contact the glass.
CLEANING THE GLASS
Clean the glass with any commercial glass cleaner or soap and
water. Do not use any abrasive material to clean the glass. Do
not clean the glass with any cool water if the glass is still hot
from the fire and smoke.
A gas line or gas log lighter may be installed for the purpose
of installing a vented or vent-free decorative gas appliance
incorporating an automatic shutoff device and complying with
the Standard for Decorative Gas Appliances for Installation in
Vented Fireplaces, ANSI Z21.60 or American Gas
Association draft requirements for Gas-Fired Log Lighters for
Wood Burning Fireplaces, Draft No. 4 dated August, 1993.
IF YOU WISH TO INSTALL AN UNVENTED (VENT-
FREE) GAS LOG SET, ONLY UNVENTED GAS LOG
SETS, WHICH HAVE BEEN FOUND TO COMPLY WITH
THE STANDARD FOR UNVENTED ROOM HEATERS,
ANSI Z21.11.2, ARE TO BE INSTALLED IN THIS
FIREPLACE.
Figure 18 GLASS DOORS
WARNING: Fireplaces equipped with glass doors
should be operated only with doors fully opened or doors
fully closed. Doors, if left partly open, may draw gas and
flame out of the fireplace opening creating risks of both
fire and smoke.
TOP VIEW OF FIREPLACE
SAFE ZONE
FIREBOX
COMBUSTIBLE MATERIAL
MUST NOT OVERLAP
FRONT FACE
7.75"
4.50"
3.00" MAX.
33°
MINIMUM 12" FROM PERPENDICULAR SIDE WALL
Figure 17B SIDE CLEARANCE – GM36
TOP VIEW OF FIREPLACE
SAFE ZONE
FIREBOX
MINIMUM 18" FROM PERPENDICULAR SIDE WALL
COMBUSTIBLE MATERIAL
MUST NOT OVERLAP
FRONT FACE
11.50"
4.50"
3.00" MAX.
33°
Figure 17C SIDE CLEARANCE – GM42/50

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OPTIONAL GAS LINE INSTALLATION
Gas line hook up should be done by your supplier or a
qualified service person.
NOTE: Before you proceed, make sure your gas supply is
turned off.
Use only a ½ inch black iron pipe and appropriate fittings.
STEP 1: To install, remove the knockout indentation on the
refractory, (or firebrick), wall located above the refractory
hearth floor. The knockout indentation must be firmly tapped
with any solid object until it is released. Remove fragmented
portions of refractory (see figure 19).
STEP 2: Remove gas line cover plate located on either side of
fireplace and pull out insulation from gas line conduit sleeve.
Save insulation for reuse.
STEP 3: Run a ½ inch black iron gas line into the fireplace
through the rear at gas line conduit sleeve (if using a raised
platform, add height). Provide sufficient gas line into
fireplace chamber for fitting connection (see figure 20).
NOTE: Secure incoming gas line to wood framing to provide
rigidity for threaded end.
STEP 4: Repack insulation around gas line and into sleeve
opening. Seal any gaps between gas line and refractory
knockout hole with refractory cement or commercial furnace
cement. Install the gas appliance or cap-off gas line if desired.
If you install a decorative gas appliance (vented gas log), the
decorative gas appliance must comply with the Standard for
Decorative Gas Appliance for Installation in Solid Fuel
burning Fireplaces, ANS Z21.60, Z21.84 or RGA 2-72, and
shall also be installed in accordance with the National Fuel
Gas Code, ANS Z223.1-NFPA 54 latest edition.
CAUTION: All gas piping and connections must be tested
for leaks after the installation is completed. After ensuring
that the gas valve is on, apply soap and water solution to
all connections and joints. Bubbles forming show a leak.
Correct all leaks at once. DO NOT USE AN OPEN
FLAME FOR LEAK TESTING AND DO NOT
OPERATE ANY APPLIANCE IF A LEAK IS
DETECTED. LEAK TESTING SHOULD BE DONE BY
A QUALIFIED SERVICE PERSON.
WARNING: Do not operate an unvented gas log set in
this fireplace with the chimney removed.
WARNING: If the fireplace has been used for wood
burning, the firebox and chimney must be cleaned of soot,
creosote and ashes by a qualified chimney cleaner.
Creosote will ignite if highly heated.
WARNING: When using a decorative vented gas log,
the damper must be removed or permanently locked in the
fully open position and the glass doors must be in the fully
open position.
Figure 20 GAS LINE INSTALLATION
Figure 19 GAS LINE KNOCKOUT

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OUTSIDE AIR AND DAMPER HANDLE OPERATION
The damper handle, which opens and closes the damper blade,
is located in the upper front face of the fireplace. Pushing the
handle forward and up of the keyway slot will free the damper
blade to automatically open. Pushing the handle forward and
down will lock the damper blade closed (see figure 21).
The outside air kit lever is located at the left and right hand
sides of the fireplace (see figure 22). Lifting the lever up will
free the outside air door to open. Pulling the lever down will
lock the door close.
FOR FURTHER OPERATING GUIDELINES,
INSTRUCTIONS AND WARRANTY INFORMATION,
PLEASE REFER TO YOUR HOMEOWNERS GUIDE
OR CONTACT YOUR AUTHORIZED DEALER.
TECHNICAL SERVICE
You may have questions about installation, operations, or
troubleshooting. If so, contact the Technical Service
Department at 1-866-672-6040. When calling, have the model
number of the fireplace ready.
WARNING: Risk of fire! Replace grate with DESA
model 109496-01 (GM50), 109496-02 (GM42), or
109496-03 (GM36) grate only. This grate has been
designed to keep the operation of your fireplace safe
and efficient.
Figure 22 OUTSIDE AIR KIT LEVER
Figure 21 DAMPER HANDLE

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BRICK INSTALLATION FOR MODEL (V)GM50
The bricks are packaged in four separate boxes. These boxes are labeled by sections of the firebox.
Box #1 – Hearth Panel
Box #2 – Rear Panel
Box #3 – Left or Right Panel
Box #3 – Left or Right Panel
Install the bricks one section at a time starting with the hearth panel followed by the rear panel and then the left or right panel. It is
important to install the bricks in this sequence. NOTE: The left and right panels have identical bricks.
** See instruction on page 19 before installing brick “S”
NOTE: INSTALLATION OF BRICK SHOULD BE DONE AFTER THE
FIREPLACE IS PLACED IN A PERMANENT LOCATION
N
J
NL
KK
L
K
L
K
L
FULL FULL
O
LEFT PANEL REAR PANEL RIGHT PANEL
HEARTH PANEL
QR
FULL
FULL FULL
FULLFULL
FULL
FULLFULL
FULL
BD
CA
BD
CA
D
C
B
A
OR
**S
RQO
D
C
A
BFULLFULL
FULL
FULLFULL
FULL
FULL
FULL
OR
**S
FULL
BD
AC
BD
AC
Q
FULL
PQQP
EE
FF
FULL
FULLFULL FULL
EFULL FULL E
FFULL FULL FULL F
EFULL FULL E
FFULL FULL FULL F
G
FULL FULL FULL
G
FULLFULL
FULL FULL FULL
FULL FULL
HH
I I
M M
J
FULL SIZE BRICKS ARE NOT STAMPED

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BRICK INSTALLATION FOR MODEL (V)GM42
The bricks are packaged in four separate boxes. These boxes are labeled by sections of the firebox.
Box #1 – Hearth Panel
Box #2 – Rear Panel
Box #3 – Left or Right Panel
Box #3 – Left or Right Panel
Install the bricks one section at a time starting with the hearth panel followed by the rear panel and then the left or right panel. It is
important to install the bricks in this sequence. NOTE: The left and right panels have identical bricks.
** See section on page 19 before installing brick “S”
NOTE: INSTALLATION OF BRICK SHOULD BE DONE AFTER THE
FIREPLACE IS PLACED IN A PERMANENT LOCATION
AC
O
LEFT PANEL REAR PANEL RIGHT PANEL
HEARTH PANEL
QR
FULL
FULL FULL
FULLFULL
FULL
FULLFULL
FULL
BD
CA
BD
CA
D
C
B
A
OR
**S
RQO
D
C
A
BFULLFULL
FULL
FULLFULL
FULL
FULL
FULL
OR
**S
FULL
BD
AC
BD
FULL FULL FULL
FULL FULL
FULL FULL FULL
UU
YY
VV
WW
KKKKX
X
LLLL
ZQ Z
F
E
F
E
F
E
E
FFULL
FULL
FULL
FULL
E
FFULL FULL
FULL
E
FFULL FULL
AA AA
FULL
FULL
FULL SIZE BRICKS ARE NOT STAMPED

- 15 - For more information, visit www.desatech.com
BRICK INSTALLATION FOR MODEL (V)GM36
The bricks are packaged in four separate boxes. These boxes are labeled by sections of the firebox.
Box #1 – Hearth Panel
Box #2 – Rear Panel
Box #3 – Left or Right Panel
Box #3 – Left or Right Panel
Install the bricks one section at a time starting with the hearth panel followed by the rear panel and then the left or right panel. It is
important to install the bricks in this sequence. NOTE: The left and right panels have identical bricks.
** See section on page 19 before installing brick “S”
NOTE: INSTALLATION OF BRICK SHOULD BE DONE AFTER THE
FIREPLACE IS PLACED IN A PERMANENT LOCATION
FULL
FULL
D
C
FULL
FULL
FULL
D
C
FULL
AB ABLLL
FULL
P
LEFT PANEL REAR PANEL RIGHT PANEL
HEARTH PANEL
QAH
FULL
AF FULL
FULLAF
FULL
FULLAF
AE
AG AC
AE
AG AC
AG
AE
AC
AD
AH QP
AG
AC
AE AFFULL
FULL
AFFULL
FULL
AF
AD
FULL
AE
AC AG
AE
AAG
QAI Q AI
CC
DD
FULL
FULL FULL
C
D
C
D
G
FULL FULL
G
FULLFULL
FULL FULL
FULL
HH
I I
MM
F
ULL SIZE BRICKS ARE NOT STAMPED

- 16- For more information, visit www.desatech.com
BRICK MATRIX FULL A B C D E F G H I J K L M N O P Q
BOX#1HEARTH-50 12 ------22224422 - - -
BOX#2REAR-50 15 ----66---------23
BOX#3LEFTorRIGHT-50 9 3333 ----------1-1
BOX#3LEFTorRIGHT-50 9 3333 ----------1-1
TOTAL 45 66666622224422225
BRICK MATRIX R S T U V W X Y Z AAABACADAEAFAGAH AI
BOX#1HEARTH-50 - -----------------
BOX#2REAR-50 - -----------------
BOX#3LEFTorRIGHT-50 1 1----------------
BOX#3LEFTorRIGHT-50 1 1----------------
TOTAL 2 20000000000000000
BRICK MATRIX FULL A B C D E F G H I J K L M N O P Q
BOX#1HEARTH-42 10 ----------44-----
BOX#2REAR-42 9 ----66--------- -1
BOX#3LEFTorRIGHT-42 9 3333 ----------1-1
BOX#3LEFTorRIGHT-42 9 3333 ----------1-1
TOTAL 37 66666600004400203
BRICK MATRIX R S T U V W X Y Z AAABACADAEAFAGAH AI
BOX#1HEARTH-42 - - - 22222 - 2 --------
BOX#2REAR-42 - -------2---------
BOX#3LEFTorRIGHT-42 1 1----------------
BOX#3LEFTorRIGHT-42 1 1----------------
TOTAL 2 20222222200000000
BRICK MATRIX FULL A B C D E F G H I J K L M N O P Q
BOX#1HEARTH-36 8 ------222--32----
BOX#2REAR-36 9 --66----------- -2
BOX#3LEFTorRIGHT-36 5 ---------------11
BOX#3LEFTorRIGHT-36 5 ---------------11
TOTAL 27 00660022200320024
BRICK MATRIX R S T U V W X Y Z AAABACADAEAFAGAH AI
BOX#1HEARTH-36 - ---------2-------
BOX#2REAR-36 - ----------------2
BOX#3LEFTorRIGHT-36 - ----------313331 -
BOX#3LEFTorRIGHT-36 - ----------313331 -
TOTAL 0 00000000026266622
25
25
104
TOTAL
30
24
BRICK MATRIX FOR MODEL (V)GM42
25
25
114
BRICK MATRIX FOR MODEL (V)GM50
TOTAL
32
32
21
21
88
BRICK MATRIX FOR MODEL (V)GM36
TOTAL
21
25

- 17 - For more information, visit www.desatech.com
BRICK INSTALLATION FOR MODEL (V)GM50H
The bricks are packaged in four separate boxes. These boxes are labeled by sections of the firebox.
Box #1 – Hearth Panel
Box #2 – Rear Panel
Box #3 – Left Panel
Box #4 – Right Panel
Install the bricks one section at a time starting with the hearth panel followed by the rear panel and then the left or right panel. It is
important to install the bricks in this sequence.
NOTE: INSTALLATION OF BRICK SHOULD BE DONE AFTER THE
FIREPLACE IS PLACED IN A PERMANENT LOCATION
HM
HZ
HO HJ HJ HJ
HR
HGHG
HI HI
HN
HEARTH PANEL
FULL
FULL
FULL
FULL
FULLFULL
FULL
FULL
FULL
FULL
FULL FULL
HL HL HL HLHL HL
HAAF
HAAF
HAAF
HAAF
HAAF
HE
HDD
HJHFF
HK
HF
HB
HB
HB
FULL
FULL
FULL
FULL
FULL
FULL
HF
HF
HF
HC
HBB
HA
HAA
HA
HA
HC
HCC
HJ HJ
HF HF
HT
HC
HC
HC
HH
HD HD HD HD
HX
HY
HU
HU
HU
HW
HF
HJ
HF
HEE
HV
HV
HV
HV
FULL
FULL
FULL
FULL
FULL
FULL
FULL
FULL
FULL
RIGHT PANEL
LEFT PANEL
HC
HD
OR
OR
HC
REAR PANEL
NRLLLL
HL HL HL
HQ
HS
HP
HFHF HF
FULL
FULL
FULL FULL
FULL
FULLFULL
FULL
FULL
FULL HF
FULL SIZE BRICKS ARE NOT STAMPED
Use bricks HDD and HX for optional gas line installation

- 18 - For more information, visit www.desatech.com
BRICK INSTALLATION FOR MODEL (V)GM42H
The bricks are packaged in four separate boxes. These boxes are labeled by sections of the firebox.
Box #1 – Hearth Panel
Box #2 – Rear Panel
Box #3 – Left Panel
Box #4 – Right Panel
Install the bricks one section at a time starting with the hearth panel followed by the rear panel and then the left or right panel. It is
important to install the bricks in this sequence.
NOTE: INSTALLATION OF BRICK SHOULD BE DONE AFTER THE
FIREPLACE IS PLACED IN A PERMANENT LOCATION
HL HL HL
HL
HL
HAAF
HAAF
HAAF
HAAF
HAAF
HJHJ HJ HJ
HJ
HFF
HF HF HF
HF
HF
HF
HK
HB
HB
HB
HBB
HC
HDD
HE
HL
OR
HNN
LEFT PANEL REAR PANEL RIGHT PANEL
HEARTH PANEL
HF HF
HO
HZ
HM
HN
HD
HIHI
HG
HI
HI
HI
HD
HD
HAA
HA
HA
HA
HCC
HC HC HC HC
HKK OR
HI
HJ
HJ
HJ
HJ
HLL
HLL
HLL
HMM
HGG
HHH
HII
HJJ
HL
AA LLLL
HJHJHJ
AA
HL
HL
FULL SIZE BRICKS ARE NOT STAMPED
Use bricks HDD and HNN for optional gas installation