DIRECT-VENT FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
CD32M 32" DV Fireplace with Fan
CD32M-1 32" DV Fireplace
CD32M-2 32" DV Fireplace with Fan & Door Switch
CD36M-A 36" DV Fireplace with Fan
CD36M-A1 36" DV Fireplace
CD36M-A2 36" DV Fireplace with Fan & Door Switch
CD42M-A 42" DV Fireplace with Fan
CD42M-A2 42" DV Fireplace with Fan & Door Switch
WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a quali-
fied installer, service agency or the gas supplier.
Save this manual for future reference.
For more information, visit www.desatech.com
WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual for correct installation
and operational procedures. For assistance or additional information consult a qualified installer, service
agency or the gas supplier.
WARNING: This direct-vent gas fireplace is intended for
use with natural or propane/LP gas only. Do not attempt
to burn any solid fuels in this appliance.
This fireplace is manufactured for Stylecrest Inc. under
the Vexar brand name by DESA.
This fireplace may be installed as an OEM installation
in a manufactured (mobile) home and must be installed
in accordance with the manufacturers instructions and
the Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280 in the United States or the
Mobile Home Standard, CAN/CSA Z240 MH Series, in
Canada. This fireplace is only for use with the type(s)
of gas indicated on the rating plate. A conversion kit is
supplied with the fireplace.
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 optional accessory items when needed. Keep
it with your other important papers.
TABLE OF CONTENTS
Introduction .......................................................... 3
Selecting Location ............................................... 3
Pre-Installation Preparation .................................. 4
Installation ........................................................... 7
Burner Flame Adjustment ..................................
Operating Fireplace ........................................... 14
Converting Fireplace From
Natural Gas To Propane/LP Gas .................. 15
2
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Troubleshooting .................................................
Illustrated Parts Breakdown and Parts List ....... 18
Specifications .................................................... 22
Wiring Diagram .................................................. 22
13
Accessory and Replacement Parts ................... 23
111916-01F
17
INTRODUCTION
WARNING: This product contains and/or generates chemicals
known to the State of California
to cause cancer or birth defects
or other reproductive harm.
Models CD32M series, CD36M-A series and
CD42M-A seri es are heat circula ti ng grav
ity direct-vent fireplaces with sealed combustion
chamber. These fireplaces use millivolt gas control
valve and millivolt ignition system.
These fireplaces are convertible with the standard
setup as natural gas. Conversion may be performed
by the O.E.M. mobile home builder or by a quali
fied service person on-site. If you are uncertain as
to what gas your unit is equipped for, please check
the rating plate located inside of the appliance
opening or consult your mobile home supplier or
your local distributor of DESA/Vexar products.
NOTICE: Check local building
codes for area requirements before installing this appliance.
BEFORE YOU BEGIN
Before beginning the installation of your appliance, read these instructions through completely.
This DESA/Vexar fireplace and its components are
safe when installed according to this installation
manual and operated as recommended. Unless
you use DESA/Vexar components designed and
tested for this fireplace system,
A SAFETY HAZARD!
The DESA/Vexar warranty will be voided by, and
DESA/Vexar disclaims any responsibility for the
following actions:
A) Modification to the fireplace, components,
doors, blower, fans or vent system.
B) Use of any component part not manufactured or
approved by DESA/Vexar in combination with
a DESA/Vexar 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 instal
lation of all factory built fireplaces. This fireplace,
when installed, must be electrically grounded in
accordance with local codes or in the absence of
local codes, with the National Electrical Code,
ANSI/NFPA 70 or the Canadian Electrical Code,
CSA C22.1.
YOU MAY CAUSE
The installation must conform with local codes or,
in the absence of local codes, with the National Fuel
Gas Code, ANSI Z223.1 or the Canadian Installa
tion Code, CAN/CGA B149. This appliance com-
plies with ANSI Z21.88-1998 and CSA 2.33-M98
as a VENTED GAS FIREPLACE HEATER.
SELECTING LOCATION
To determine the safest and most efficient location for your fireplace, consider the following
guidelines:
1. The location must allow for proper clearances
(see Figure 1).
2. Consider a location where 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 makes ventilation installation easier.
In selecting a location, the following precautions
must be observed:
• Do not connect this appliance to a chimney
system used for solid fuel burning fireplace.
• Due to high temperatures, do not locate this
appliance in high traffic areas or near furniture
and draperies.
• Never obstruct the openings of the appliance
or flow of ventilation air. Keep the control
compartments accessible.
FULL
PROJECTION
Flush installation is recommended where living
space is limited.
Projected installation may be ideal for a new
addition to an existing finished wall.
Corner installation makes use of a space that may
not normally be used and provides a wider and
more efficient range for radiant heat transfer.
Figure 1 - Common Fireplace Locations
CORNER
INSTALLATION
FLUSH
INSTALLATION
-
111916-01F 3
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SELECTING LOCATION
C
B
A
D
E
F
G
To
p of Louver Opening
3
2
1
4
5
6
7
Wa
ll
Continued
• Do not locate appliance close to where gasoline
or other flammable liquids may be stored. The
appliance must be kept clear and free from
combustible materials.
• Do not use this appliance if any part has been
under water. Immediately contact a local service
technician to examine the appliance and to re
place any part(s) of the control ignition system
and other related components that have been
submerged under water.
Mantel
Depth
(1) 14" (A) 16"
(2) 12" (B) 14"
(3) 10" (C) 12"
(4) 8" (D) 10"
-
(5) 6" (E) 8"
(6) 4" (F) 6"
(7) 2" (G) 4"
Mantel From Top
of Opening
PRE-INSTALLATION
PREPARATION
CAUTION: Do not block
required air spaces with insulation or any other material. Do not
obstruct the effective opening
of the appliance with any type
of facing material.
CLEARANCES TO COMBUSTIBLES
Minimum clearances to combustibles for the
fireplace are:
• Back and Sides of Fireplace . . . . . . . . . . . .
• Floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Perpendicular Wall . . . . . . . . . . . . . . . . . . .
• Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Top of Standoffs . . . . . . . . . . . . . . . . . . . . .
MANTEL CLEARANCES
Woodwork, such as wood trims, mantles and other
combustible materials should be placed within the
required clearance specified in Figure 2.
0"
0"
6"
36"
0"
Figure 2 - Mantel Clearances
4
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111916-01F
PRE-INSTALLATION
A
B
E
F
G
H
D
C
Nailing Tabs
B
A
C
PREPARATION
Continued
VENT TERMINATION CLEARANCES
The final position of your fireplace depends on
the location of the vent termination in relation to
the clearances that must be observed as shown in
Figure 5 on page 6.
The vent system serves as the “chimney” as well
as the combustion air supply (air intake). The
horizontal run must have a rise of 1/4" (.6 cm) for
every 12" (30.48 cm) of horizontal run towards the
termination. The maximum horizontal run depends
on the vertical rise from the fireplace adapter collar
to the vent termination (see table below).
VERTICAL HORIZONTAL
0 to 1 ft (30.48 cm)
1 ft (30.48 cm) to 4 ft (121.92 cm)
2 ft (60.96 cm) to 8 ft (243.84 cm)
3 ft (91.44 cm) to 12 ft (365.76 cm)
4 ft (121.92 cm) to 16 ft (487.68 cm)
5 ft (152.40 cm) to 15 ft (457.20 cm)
6 ft (182.88 cm) to 14 ft (426.72 cm)
7 ft (213.36 cm) to 13 ft (396.24 cm)
8 ft (243.84 cm) to 12 ft (365.76 cm)
FRAMING
Once the final location has been determined, observing height clearances for vent termination, you
may construct framing using dimensions shown in
Figures 3 and 4, depending on your installation.
If the appliance is to be installed directly on carpet
ing, tile (other than ceramic) or any combustible
material other than wood flooring, the appliance
must be installed on a metal or wood panel extending the full width and depth of the appliance.
CD32M CD36M-A CD42M-A
A 32 3/8" 36 1/8" 40 1/8"
B 34 5/8" 41 1/4" 48 1/4"
C 19" 23 1/2" 25 5/8"
Figure 3 - Framing Dimension
-
WARNING: Never allow the
vent to run downward as this
may cause excessive tempera
-
tures which could cause a fire.
WARNING: Horizontal sections of this vent system require
a minimum clearance of 2" from
the top of the pipe and 1" mini
mum to the sides and bottom.
Vertical sections of this system
require a minimum of 1" clearance to combustible materials
on all sides of the pipe.
111916-01F 5
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CD32M CD36M-A CD42M-A
A 28 1/2" 35 3/4" 41 5/8"
B 13 5/8" 15" 21 5/8"
C 39 3/8" 49 5/8" 58 1/2"
D 9 1/2" 10 3/8" 13 1/2"
E 9 7/8" 13 3/4" 16 3/4"
F 34 1/2" 41 1/8" 48"
G 35 1/2" 42 1/8" 48 1/4"
H 54 3/8" 68 1/4" 81 1/2"
Figure 4 - Corner Installation
Fixed
Closed
Openable
Fixed
Closed
Openable
V
V
V
V
V
V
V
V
X
X
V
X
G
G
J
F
B
B
K
N
H
I
A
N
E
L
D
B
M
A
C
B
V
V
A
G
G
B
TERMINATION CAP
AIR SUPPLY INLET
GAS METER RESTRICTED AREA
(TERMINATION PROHIBITED)
A = clearance above grade, veranda, porch, deck, or balcony
[*12 inches (30.5cm) minimum]
B = clearance to window or door that may be opened
[12 inches (30.5cm) minimum]
C = clearance to permanently closed window [minimum 12 inches
(30.5cm) recommended to prevent condensation on window]
D = vertical clearance to ventilated soffit located above the terminal
within a horizontal distance of 24 inches (61cm) from the
center-line of the terminal [18 inches (45.7cm) minimum]
E = clearance to unventilated soffit [12 inches (30.5cm) minimum]
F = clearance to outside corner (see below)
G = clearance to inside corner (see below)
H = *not to be installed above a meter/regulator assembly within
36 inches (91.4cm) horizontally from the center-line of the regulator
I = clearance to service regulator vent outlet [*72 inches (182.9cm)
minimum]
J = clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other fireplace [*12 inches (30.5cm)
minimum]
K = clearance to a mechanical air supply inlet [*72 inches (182.9cm)
minimum]
L = † clearance above paved side-walk or a paved driveway located on
public property [*84 inches (213.4cm) minimum]
M = clearance under veranda, porch, deck [*12 inches (30.5cm) minimum ‡]
N = clearance above a roof shall extend a minimum of 24 inches (61cm)
above the highest point when it passes through the roof surface and
any other obstruction within a horizontal distance of 18 inches (45.7cm)
† vent shall not terminate directly above a side-walk or paved driveway which is located between two
single family dwellings and serves both dwellings *
‡ only permitted if veranda, porch, deck or balconey is fully open on a minimum of 2 sides beneath the floor*
* as specified in CAN/SGA B149 (.1 or .2) Installation Codes (1991) for Canada or for U.S.A. installation follow
the current National Fuel Gas Code, ANSI Z223.1
Note: Local codes or regulations may require different clearances
A = 6" (15.2cm)
Inside Corner
V
B
E
V
B = 6" (15.2cm)
C = Maximum depth of 48" (121.9cm) for
recessed location
D = Minimum width for back wall of
recessed location Combustible - 38" (96.5cm)
Noncombustible - 24" (61cm)
E = Clearance from corner in
recessed location Combustible - 6" (15.2cm)
Noncombustible - 2" (5.1cm)
Outside Corner Recessed Location
G
H
G = Combustible 24" (61cm)
Noncombustible 18" (45.7cm)
Balcony with No Side Wall
V
J
Combustible &
Noncombustible
H = 24" (61cm)
J = 20" (50.8cm)
Balcony with Perpendicular Side Wall
C
D
C
Termination Clearances for Buildings with Combustible and Noncombustible Exteriors
PRE-INSTALLATION PREPARATION
Continued
Figure 5 - Minimum Clearances for Vent Terminations
6
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111916-01F
INSTALLATION
WARNING: Read all instructions completely and thoroughly
before attempting installation.
Failure to do so could result in
serious injury, property damage or loss of life. Operation of
improperly installed and maintained venting system could
result in serious injury, property
damage or loss of life.
NOTICE: Failure to follow these instructions will void the warranty.
VENTING INSTALLATION
PRECAUTIONS
Consult local building codes before beginning the
installation. The installer must make sure to select
the proper vent system for installation. Before
installing vent kit, the installer must read this
fireplace manual and vent kit instructions.
Only a qualified service person should install
venting system. The installer must follow these
safety rules:
• Wear gloves and safety glasses for protection
• Use extreme caution when using ladders or
when on roof tops
• Be aware of electrical wiring locations in walls
and ceilings
The following actions will void the warranty on
your venting system:
• Installation of any damaged venting component
• Unauthorized modification of the venting system
• Installation of any component part not manu
factured or approved by DESA
• Installation other than as instructed by these
instructions
WARNING: This gas fireplace
and vent assembly must be
vented directly to the outside. The
venting system must NEVER be
attached to a chimney serving a
separate solid fuel burning appliance. Each gas appliance must
use a separate vent system. Do
not use common vent systems.
WARNING: Horizontal sections of this vent system require
a minimum clearance of 2" from
the top of the pipe and 1" mini
mum to the sides and bottom.
Vertical sections of this system
require a minimum of 1" clearance to combustible materials
on all sides of the pipe.
VENTING INSTALLATION
1. Install elbow to fireplace collar adapter located
on back of the unit at a 45° angle. Slide elbow
over collar and twist to lock. Check to insure
proper connection (see Figure 6).
2. Continue to install remainder of pipe for
desired installation. Make sure each section
is twist-locked securely.
3. When installation of vent pipe is complete, in
stall vent termination. Depending on the loca
tion of your fireplace, you will vent vertically
or horizontally.
4. Allow 1" of pipe to protrude from internal
wall, dep ending on wall thic kn ess. See
Figure 7, page 8.
5. For horizontal installation, an optional siding
standoff may be installed between the vent cap
and the exterior wall. Secure horizontal vent cap
to standoff. Secure standoff/vent cap assembly
to wall (see Figure 7, page 8). Do not seal termi
nation to vent pipe. The vent termination must
be removable for service pipe inspection.
Female
Locking Lugs
-
Vertical Flue
Restrictor
(For Vertical
Venting
Application)
Figure 6 - Venting Installation
Male
Locking Lugs
-
-
-
111916-01F 7
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INSTALLATION
Continued
6. For vertical installation, a vertical termination is
available. Also for vertical venting application,
install vertical flue restrictor into inner collar of
fireplace as shown in Figure 6, page 7.
When installing a length of pipe for vertical
termination that is over 3 ft., support the pipe
every 3 ft. using metal wall straps. Vertical to
horizontal pipe must be kept at a 1 ft. to 4 ft. ratio
with a maximum run of no more than 20 ft.
If an offset is necessary in the attic to avoid
obstruction, it is important to support the
vent pipe every 3 ft. to avoid excessive
stress on the elbows and possible separation
(see Figure 8).
Clearances must be maintained between the roof
and the termination. Refer to chart below.
Roof Pitch Minimum Height
Flat - 7/12 1 ft. (30.48 cm)
7/12 - 8/12 1
8/12 - 9/12 2 ft (60.96 cm)
9/12 - 10/12 2
10/12 - 11/12
11/12 - 14/12
14/12 - 16/12 6 ft (182.88 cm)
16/12 - 18/12 7 ft (213.36 cm)
18/12 - 20/12 7
20/12 - 21/12 8 ft (243.84 cm)
Above Roof
1
/
ft. (45.72 cm)
2
1
/
ft (76.20 cm)
2
4 ft (121.92 cm)
5 ft (152.40 cm)
1
/
ft (228.60 cm)
2
Direct-Vent Pipe
CD32M and
CD36M-A
4 1/4" Inner and
7 1/4" Outer
CD42M-A
5" Inner and 8"
Siding Standoff
(Optional)
Minimum Pipe
Overlap 1 1/4"
Outer
Wall Firestop
Deflector
Shield
Maintain 1"
Minimum
Air Space
Around Outer
Pipe when
Penetrating a
Wall
Framed Openings
CD32M and
CD36M-A
Screws
Horizontal
Termination
(Vent Cap)
Exterior Wall
with Vinyl
Siding
10" x 10"
CD42M-A
10
3
4
/
" x 10
3
4
/
"
Figure 7 - Vent Termination (Horizontal)
Roof
Flashing
Wall Strap
45° Elbows
Ceiling Firestop
Figure 8 - Vertical Termination with
Offset and Wall Strap
8
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111916-01F
INSTALLATION
Continued
ELECTRICAL HOOKUP AND
REMOTE RECEIVER DIAGRAM
An outlet box with two receptacles (see Figure 9) has
been supplied for your convenience and is located
inside on the lower right side of the fireplace.
The remote control receiver is factory wired and
connected to the convertible gas valve as shown
in Figure 10.
Outlet Box
The appliance must be isolated from the gas supply piping system by closing its individual shutoff
valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than
1/2 psig (3.5 kPa).
The gas control valve is secured underneath the
firebox. Two 1/8" ports are provided on the gas
control valve for pressure test gauge connections
(see Figure 11).
Pilot Gas Line
Do Not Kink
Pilot Adjustment
ON/OFF
Knob
To Pilot
Burner
To Main
Burner
Three-prong Plug
Figure 9 - Duplex Outlet
Convertible
Gas Valve
Figure 10 - Remote Control Receiver
Remote
Control
Receiver
GAS SUPPLY TESTING
NOTICE: This section is intended as a guide for qualified
technicians installing gas to the
appliance.
WARNING: Do not connect
appliance before pressure testing gas piping. Damage to gas
valve may result and an unsafe
condition may be created.
The appliance and its individual shutoff valve must
be disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of 1/2 psig (3.5 kPa).
Inlet
Pressure
Outlet
Pressure
Figure 11 - Gas Control Valve
Flame
Adjustment Knob
GAS LINE HOOK-UP
WARNING: Gas line hookup should be done by your gas
supplier or a qualified service
person.
WARNING: Before you proceed, make sure your gas supply
is OFF.
An equipment shutoff valve has been included in
the fireplace's gas supply system. However, consider installing an extra shutoff valve outside the
applianceʼs enclosure (check local codes), where
it can be accessed more conveniently with a key
through a wall as shown in Figure 12.
Key
Figure 12- Typical Exterior Wall Gas
Shutoff Installation
Shutoff
Valve
Extension
111916-01F 9
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INSTALLATION
1/8"
(0.3cm)
3/8" - 1/2"
(.95cm-1.3cm)
Continued
In conformance with local codes, route a 1/2"
NPT gas line towards the appliance coming in
from either the left or right side of the fireplace
(see Figure 13).
Install a sediment trap between the incoming gas
line and the gas control box (see Figure 14). The
sediment trap should extend down a minimum of
3" (7.62 cm) beyond the center of the pipe.
When routing gas line through conduit sleeve,
make sure to repack insulation to fill gaps between
gas line and conduit sleeve. Compounds used on
threaded joints of gas piping shall be resistant to
the action of propane or natural gas. Compounds
should be applied lightly to ensure excess sealant
does not enter the gas line.
Complete your gas line installation by connect
ing the incoming gas line to the flexible gas
line. Secure tightly with a wrench but do not
over-tighten.
WARNING: All gas piping
and connections must be tested
for leaks after the installation is
completed.
Never use an open flame to
check for a leak. After ensuring
that the gas valve is open apply commercial leak detection
fluid to all gas joints. Bubbles
forming show a leak. Correct all
leaks at once.
Do not operate any appliance if
a leak is detected.
Incoming 1/2" Gas Line
Permitted By Local Codes
Sediment Trap
(Not Supplied)
3" Min.
(7.6 cm)
Figure 14 - Sediment Trap
PILOT ADJUSTMENT
The pilot or electrode assembly is factory preset
for the proper flame height. Alterations to these
settings may have occurred during shipping and
handling. If this is the case, some minor readjust-
-
ments may be necessary and should be done by a
qualified service technician. The proper settings
for the thermopile height should be at a distance
of 3/8" (.95 cm) to 1/2" (1.27 cm) from the pilot
flame as shown in Figure 15.
Figure 15 - Pilot Assembly
REMOVING GLASS PANEL
Gas Routing
(Right Side Not Shown)
Side of
Fireplace
Front Face
Figure 13 - Gas Line Routing
10
CAUTION: Before you proceed, make sure your gas control
valve is in the OFF position.
1. To remove louvers, pull both spring latches
(located in each end of louver) toward center
of appliance at the same time until disengaged
from locating holes. Repeat for bottom end
spring latches (see Figure 16, page 11).
2. Remove screen rod by removing rod loop
from glass door center bracket. Slide screen
rod either to the left or right of fireplace until
one end is free to completely remove screen
from fireplace.
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111916-01F
INSTALLATION
Open
Close
1
2
3
4
Continued
3. Undo latches located on top and bottom of
firebox (see Figure 17). Carefully swing door
to the left. The glass door is securely mounted
to the firebox with 5 screws.
Glass
Locating
Holes
Spring
Latch
Bottom Louver
Figure 16 - Removing Louvers
CD32M
Log #1
Placement
Figure 18 - Installing Log #1
(CD36M-A Series Shown)
Figure 19 - Installing Log #2
(CD36M-A Series Shown)
Figure 17 - Spring Latches
INSTALLING LOG SET
Each log is marked with a number in the following
diagram. These numbers will help in identify
ing the logs when installed. It is very important
to install these logs exactly as instructed. Do
not modify logs. Only use logs supplied with
fireplace.
Models CD32M and CD36M-A Series
1. Place log #1 (back log) on top of grate as
shown in Figure 18 for the CD36M-A Series.
Log #1 will go in front of the metal partition
on grate (see Figure 18). Make sure notches
in bottom of log fit over grate.
2. Place log #2 (large front log) over pins on grate
(see Figure 19).
3. Place log #3 (c-shaped crossover log) onto rear
4. Place log #4 (small round log) on pin on right
111916-01F 11
and front logs as shown in Figure 20. Make
sure it is seated properly on the smooth surface
on front log and on the pin on back log.
side of front log (see Figure 21).
-
Figure 20 - Installing Log #3
(CD36M-A Series Shown)
Figure 21 - Installing Log #4
(CD36M-A Series Shown)
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INSTALLATION
5
6
1
1
2
3
5
6
7
4
Continued
5. Place log #5 (small front log) onto the front
left part of grate making sure notches fit over
prongs of grate (see Figure 22).
6. Place log #6 onto two pins on left side of back
and front logs (see Figure 22).
5. Place log #5 (top log) onto right pin of front log
(#2) and smooth surface of rear log (#3). Make
sure it is seated properly (see Figure 27).
6. Place log #6 (left log) on left pin of front log
(#2) and smooth surface of rear log (#3). Make
sure it is seated properly (see Figure 28).
7. Place log #7 (right log) on right pin of top
log (#5). Make sure it is seated properly (see
Figure 28).
Figure 22 - Installing Logs #5 and #6
(CD36M-A Series Shown)
Model CD42M-A Series
1. Place log #1 (small base log) onto pin on left
side of grate extension (see Figure 23).
2. Rest left side of log #2 (front log) on top of
log #1 and right side onto pin located on right
side of grate extension (see Figure 24).
3. Place log #3 (rear log) onto pins on rear of
grate (see Figure 25).
4. Place log #4 (crossover log) onto pins from
both logs #2 and #3 (see Figure 26).
Figure 23 - Installing Log #1, Model
CD42M-A
Figure 25 - Installing Log #3, Model
CD42M-A
Figure 26 - Installing Log #4, Model
CD42M-A
Figure 27 - Installing Log #5, Model
CD42M-A
Figure 24 - Installing Log #2, Model
12
CD42M-A
Figure 28 - Installing Logs #6 and #7,
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Model CD42M-A
111916-01F
INSTALLATION
Continued
Lava Rock and Ember Material
1. For all models, place lava rock along sides and
front of firebox bottom in areas that are visible. It
is not necessary to use all lava rock provided.
NOTICE: Do not put lava rock
on or under burner. Placing
lava rock on burner could cause
performance problems.
2. Pull ember material apart into pieces no larger
than a dime. Place loosely and directly onto
exposed section of front burner and along space
between burner and grate prongs. These will create glowing ember appearance as flame touches
ember material. Do not block air slots by using
too much ember material in one area. It is not
necessary to use all ember material provided.
3. When lava rock and ember material are in
place, close and latch glass door and secure
louvers in place.
3. Align holes on right face extension with holes
on right side of front face assembly and secure
with screws previously removed (see Figure
29). Do the same for left side.
4. Secure top face extension with left and right
face extensions with two sheet metal screws
(see Figure 29).
Top Face
Extension
WARNING: The glass door
must be securely in place before
operating fireplace. Do not operate fireplace if glass is missing
or broken.
DECORATIVE FACING
Any noncombustible material may be used as facing (glass, tile, brick, etc.) as long as the proper
clearances are observed (see Clearances to Com-
bustibles, page 4). Louvered openings must not
be obstructed and upper and lower panels must
remain accessible for service. Use only heat-resistant, noncombustible mortar or adhesive when
securing decorative facing materials.
FACE EXTENSION FOR MODEL
CD32M ONLY
Model CD32M comes equipped with a front face
extension. The front face extension would add
3 1/2" to the width and 3/4" to the height of the
fireplace face.
To install face extension:
1. Remove existing screws from front face as
sembly as shown in Figure 29.
2. Align holes on top face extension with holes on
top side of front face assembly and secure with
screws previously removed (see Figure 29).
Side Face
Extensions
Figure 29 - Front Face Extension, Model
CD32M Only
BURNER FLAME
ADJUSTMENT
The burner flame adjustment (shutter opening) has
been factory preset (for natural gas) to the proper
air-to-gas ratio. This ratio results in an even, clean
burning flame across the burner (see Figure 30).
CORRECT
INCORRECT
CLOSE
SHUTTER
-
INCORRECT
OPEN
SHUTTER
Long, Blue Flame with Yellow Tips
Short, Sharp, Blowing Flame
Long, Uneven, Yellow Flame
Figure 30 - Burner Flame Patterns
111916-01F 13
www.desatech.com
BURNER FLAME
ADJUSTMENT
Continued
If adjustment is necessary, you can restore the
proper flame setting by loosening the air shutter
screw and rotating the air shutter until proper
setting is achieved (see Figure 31). The correct
shutter openings are as follows:
Tube Burner Pan Burner
Model Natural Propane/
CD32M 0.188" Max. — —
CD36M-A 0.188" Max — —
CD42M-A 0.188" 0.313" 0.188" 0.500"
WARNING: Improper installation, adjustment, alteration, service or maintenance can cause
injury or property damage. Refer
to this manual for assistance.
Consult a qualified installer for
additional information.
Adjustment
Screw
Firebox
Bottom
Adjustment Screw
Air Shutter
Opening
Firebox
Bottom
Burner
Gas Line
Figure 31 - Air Shutter Adjustments
Natural Propane/
LP
Burner Pan
Manifold
Air Shutter
Opening
LP
Burner
Gas Line
Burner
Tube
Manifold
OPERATING FIREPLACE
OPERATION GUIDELINES
• When used for the first time, the fireplace may
emit a slight odor for about 16 to 24 hours. This
is normal and is due to the “curing” of the logs
and the “burn-in” of internal paint and lubricant
used in the manufacturing process.
• Keep compartments, logs, burners and area sur
rounding logs clean by vacuuming and brushing
at least twice a year or as necessary.
• Turn off gas and remote switch before servicing
appliance. Any safety screen or guard removed
for servicing the fireplace must be replaced
prior to operation.
• Have a qualified agency periodically inspect
vent system at the start of each heating season
for any obstruction which will hinder its normal
operation. Never obstruct the flow of combus
tion and ventilation air. Keep the front of the
fireplace clear of all obstacles and materials.
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly,
a fire or explosion may result
causing property damage, per
sonal injury or loss of life.
A. This appliance has a pilot which must be
lighted by hand. When lighting the pilot,
follow these instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next
to the floor because some gas is heavier than
air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not
use any phone in your building.
• Immediately call your gas supplier from
a neig h bor ʼs phon e. Fo llo w the gas
supplierʼs instructions.
• If you cannot reach your gas supplier, call
the fire department.
C. Use only your hand to push in control knob.
Never use tools. If the knob will not push
in or slide by hand, donʼt try to repair it,
call a qualified service technician. Force
or attempted repair may result in a fire or
explosion.
-
-
-
14
www.desatech.com
111916-01F
OPERATING FIREPLACE
Continued
D. Do not use this appliance if any part has been
under water. Immediately call a qualified
service technician to inspect the appliance and
to replace any part of the control system and
any gas control which has been under water.
Thermocouple
Piezo
Ignitor
Pilot Burner
Thermopile
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information above
before proceeding.
2. Set the “HI-LO” knob to the lowest setting.
3. Turn off all electrical power to the appliance.
4. Open control access panel.
5. Push in gas control knob slightly and turn
clockwise to “OFF”.
6. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor.
If you smell gas, STOP! Follow “B” in the
safety information above. If you donʼt smell
gas, go to the next step.
7. The pilot is located by the main burner.
8. Turn knob on gas control counterclockwise
9. Push in the control knob all the way and hold
10. Turn gas control knob counterclockwise
11. Set “HI-LO” knob to desired setting.
12. Turn on all electric power to the appliance.
Note: It is recommended that you maintain the
gas control knob in the full OFF position during
lengthy periods of seasonal non-usage.
Position
Indicator
Gas Control
Knob
Figure 32 - Control Knob in Pilot Position
111916-01F 15
to “PILOT”.
in. Immediately light the pilot by pressing the
red ignitor button until a flame appears. Con
tinue to hold the control knob in for about one
(1) minute after the pilot is lit. Release knob
and it will pop back up. Pilot should remain
lit. If it goes out, repeat steps 5 through 9.
• If knob does not pop out when released, stop
and call service technician or gas supplier.
• If the pilot will not stay lit after several tries,
turn gas control knob to “OFF” and call
your service technician or gas supplier.
to “ON”. Knob can be turned to “ON”
only if the control knob is popped out.
HI/LO Knob
www.desatech.com
1. Turn off the wall switch.
2. Turn off all electric power to the appliance
if service is to be performed.
3. Remove control access panel.
4. Push in gas control knob slightly and turn
clockwise
5. Replace control access panel.
CONVERTING FIREPLACE
FROM NATURAL GAS TO
The conversion kit is packaged with the unit.
Ple as e che ck the contents before beginnin g
this conversion.
-
ing, make sure the gas control
valve is in the OFF position and
all electrical power to the appli
ance is turned off.
CONVERTING PILOT
1. Wait five (5) minutes to clear out any gas. Smell
for any gas odor, especially near the floor. If any
gas odor is present, STOP! See For Your Safety
Read Before Lighting on page 14.
2. Locate the latch on the louver assembly.
Remove top and bottom louvers by pulling
the spring latches toward the center of the
fireplace simultaneously until they are disen
gaged from the locating holes.
3. Undo latches located on top and bottom of fire
box and swing door to the fully open position.
4. Carefully remove log set and ember material from
burner and place them aside in a safe place.
5. Replace main burner orifice with burner orifice
included in conversion kit (Model CD42M-A
series contains two burner orifices).
Figure 33 - Pilot
TO TURN OFF GAS
TO APPLIANCE
to “OFF”. Do not force.
PROPANE/LP GAS
WARNING: Before proceed-
-
-
-
HI
LO
O
F
F
P
I
L
O
T
O
N
CONVERTING FIREPLACE
HI
LO
O
F
F
P
I
L
O
T
O
N
FROM NATURAL GAS TO
PROPANE/LP GAS
Continued
6. Locate air shutter at end of burner manifold (end
of tube burner for CD42M series). Loosen screw
and adjust air shutter to proper setting (see Burner
Flame Adjustment, page 13). Retighten screw.
7. Remove pilot hood by pulling up until it
disengages from barrel. Do not remove the
retainer clip (see Figure 34).
8. Remove pilot orifice from inside barrel using
a 5/32" allen wrench to unscrew the orifice.
9. Replace pilot orifice with LP orifice supplied
with this kit. The number 30 is stamped on the
sleeve for identification. Insert small end of
new pilot orifice into barrel and thread until
tight with the allen wrench.
10. Line up notch on pilot hood to the positioning tab
on barrel receiver and snap back into position.
IMPORTANT: Be careful not to bend or kink the
aluminum tubing during conversion. Make sure
the pilot hood and orifice are properly mated and
aligned after finishing this conversion.
Pilot Hood
Pilot Orifice
Barrel Clip
5/32" Allen
Wrench
Pilot Bracket
3. Install the identification label enclosed with
gas valve regulator to the valve body where
it can easily be seen (see Figure 36).
WARNING: The conversion kit
must be installed by a qualified
service technician in accordance
with the manufacturers instructions and all applicable codes
and requirements of the authority
having jurisdiction. If any information is these instructions is not followed correctly, a fire, explosion
or production of carbon monoxide
may result causing property damage, personal injury or loss of life.
The qualified service technician is
responsible for the proper installation of this conversion kit.
Mounting
Screws
Diaphragm/
Spring
Components
Pressure
Regulator
Tower
Figure 34 - Converting Pilot
CONVERTING CONTROL VALVE
Convert the gas control valve by swapping out the
valve regulator portion of the gas valve.
1. Using a TORX T20 or a slotted screwdriver,
remove and dis ca rd the three mou nt in g
screws, pressure regulator tower and dia
phragm/spring components (see Figure 35).
2. Insure that the rubber gasket is properly
positioned on the new pressure regulator
assembly. Install new pressure regulator as
sembly to valve using new mounting screws
supplied with kit. Tighten screws securely
(approximately 25 in/lb). See Figure 36.
16
www.desatech.com
Figure 35- Removing Parts for Gas
Control Valve Conversion
Mounting
Screws
-
-
Identification
Label
Figure 36- Installing New Parts for Gas
Control Valve Conversion
Rubber
Gasket
111916-01F
TROUBLESHOOTING
WARNING: Turn off heater and let cool before servicing. Only a
qualified service person should service and repair heater.
WARNING: Turn off heater and let cool before servicing. Only a
qualified service person should service and repair heater.
OBSERVED PROBLEM
Pilot will not stay lit
Pilot lit but no flame on burner
POSSIBLE CAUSE
1. Defective thermocouple
1. Remote or wires defective
2. Thermopile not generating
sufficient milivoltage
3. Plugged burner orifice
REMEDY
1. Check pilot flame. It must
impinge on thermocouple
2. Clean or adjust pilot for maxi
mum flame impingement on
thermocouple
3. En su re the con ne ct io n be
tween valve and thermocouple
are tight and secure
4. Che ck ther moc ouple with
millivolt meter. Take reading
at thermocouple terminals of
gas valve with remote control
off. It should read 18 millivolts
minimum. Replace faulty ther
mocouple if reading is below
specified minimum
1. Check remote wires for proper
connectio ns . Place jumper
wire across terminals at re
mote control. If burner comes
on, replace remote. If okay,
pl ace ju mpe r wire ac ros s
remote contr ol at valve. If
burner comes on, wires are
faulty or connections are bad
2. Check thermopile with mil
livolt meter. Take reading at
thermopile terminals of gas
valve with remote control off.
It should read 325 millivolts
minimum. Replace thermopile
if reading is below specified
minimum
3. Check burner orifice for stoppage and remove
-
-
-
-
-
Frequent pilot outage
111916-01F 17
1. Pilot flame may be too low
or blowing (high) causing
safety pilot to “drop out”
www.desatech.com
1. Clean and/or adjust pilot flame
for maximum flame impinge
ment on thermocouple
-
6
7
19
18
10
12
23
24
34
2
11
17
8
21-2
21-6
21-4
21-5
21-3
21-1
1
13
9
16
3
14
4
20
15
5
15
42
40
35
36
22
37
39
38
25
41
26
30
27
28
29
33
31
32
ILLUSTRATED PARTS BREAKDOWN
MODELS CD32M AND CD36M-A SERIES
18
www.desatech.com
111916-01F
PARTS LIST
MODELS CD32M AND CD36M-A SERIES
KEY PART NUMBER
NO.
1 ** ** Firebox Assembly 1
2 ** ** Face Weldment 1
3 108892-01 108010-01 Door Assembly 1
4 108903-01 108011-01 Top Panel Assy Louver 1
5 108903-02 108011-02 Bottom Panel Assy Louver 1
6 ** ** Fireplace Top 1
7 ** ** Fireplace Top Insulation 1
8 ** ** Fireplace Surround 1
9 108885-01 108074-01 Burner Assembly 1
10 108890-01 108076-01 Burner Base Gasket 1
11
12 108901-01 110990-01 Right Refractory† 1
13 108901-02 110989-01 Left Refractory† 1
14 11418 11418 Push-On Nut 2
15 108440-01 12105 Screen 2
16 108455-02 13113 Screen Rod 1
17 ** ** Electrical Duct Assy 1
18 ** ** Gas Knock-Out Cover 2
19 ** ** Gas Conduit Assy 1
20 109082-03 109082-01 Heat Shield 1
21 109022-01 109006-01 Log Set 1
21-1 109403-01 110182-01 Front Log (Log 1) 1
21-2 109404-01 109007-01 Rear Log (Log 2) 1
21-3 109407-01 109009-01 Base Log (Log 3) 1
21-4 109406-01 109008-01 Crossover Log (Log 4) 1
21-5 109405-01 107348-01 Left Top Log (Log 5) 1
21-6 109408-01 107347-01 Right Top Log (Log 6) 1
22 11102 11102 Screw #8-32 x 3/8 PPH Zinc 2
23 11105 11105 Screw #10 x 1/2 Zinc 9
24 11179 11179 Screw #10-24 x 1/4 Zinc 4
25 11237 11237 Screw Trilab M4 x 8mm 1
26 14389 14389 HI-LO Sit Valve (Nat Gas) 1
27 14492 14492 Piezo Ignitor 1
28 14500 14500 Brass Fitting 2
29 14253 14253 Flexible Connector 1
30 14511 14511 Ignitor Bracket 1
31 14528 14528 Brass Elbow Fitting 1
32 104506-25 14496 Orifice 1
33 104509-02 14576 Aluminum Tubing Assy 1
34 26808 26808 Valve Bracket 1
35 26827 26827 Switch Bracket 1
36 108886-01 108077-01 Grate Base 1
37 108891-01 104504-03 Burner Tube 1
38 108084-02 108084-02 Pilot Assembly (Nat Gas) 1
39 ** ** Burner Base Assembly 1
40 109699-01 — Right Face Extension 1
41 109699-02 — Left Face Extension 1
42 109700-01 — Top Face Extension 1
** Not a field replaceable part. † Optional - See page 23.
111916-01F 19
CD32M CD36M-A DESCRIPTION QTY.
108897-01 110991-01 Rear Refractory† 1
25487 25487 Lava Rock 1
110251-01 110251-01 Micro Switch Assembly
27253 27253 Notice Label 1
109896-01 112033-01 Gas Conversion Kit 1
PARTS AVAILABLE NOT SHOWN
www.desatech.com
1
ILLUSTRATED PARTS BREAKDOWN
37
23
41
42
38
22
39
32
31
33
28
26
25
29
24
34
35
40
36
30
27
28
6
7
19
18
10
12
2
11
17
8
20
1
4
13
16
3
14
15
5
15
9
212
21-3
21-6
21-7
21-5
21-4
21-1
MODEL CD42M-A
20
www.desatech.com
111916-01F
MODEL CD42M-A
PARTS LIST
KEY
NO.
1 ** Firebox Assembly 1
2 ** Face Weldment 1
3 108328-01 Door Assembly 1
4 108331-01 Top Panel Assembly Louver 1
5 108331-03 Bottom Panel Assembly Louver 1
6 ** Fireplace Top 1
7 ** Fireplace Top Insulation 1
8 ** Fireplace Surround 1
9 108329-05 Burner Assembly 1
10 108374-01 Burner Base Gasket 1
11 111300-01
12 111301-01 Right Refractory† 1
13 111302-01 Left Refractory† 1
14 11418 Push-On Nut 2
15 107840-01 Screen 2
16 108455-01 Screen Rod 1
17 110037-01 Electrical Duct Assembly 1
18 ** Gas Knock-Out Cover 2
19 ** Gas Conduit Assembly 1
20 ** Heat Shield 1
21 108778-01 Log Set 1
21-1 109402-01 Small Base Log (Log 1) 1
21-2 109396-01 Front Log (Log 2) 1
21-3 109397-01 Rear Log (Log 3) 1
21-4 109398-01 Crossover Log (Log 4) 1
21-5 109399-01 Top Center Log (Log 5) 1
21-6 109400-01 Top Left Log (Log 6) 1
21-7 109401-01 Top Right Log (Log 7) 1
22 11102 Screw #8-32 x 3/8 PPH Zinc 2
23 11105 Screw #10 x 1/2 Zinc 9
24 11179 Screw #10-24 x 1/4 Zinc 4
25 11237 Screw Trilab M4 x 8mm 1
26 14389 HI-LO Sit Valve (Natural Gas) 1
27 14492 Piezo Ignitor 1
28 14500 Brass Fitting 2
29 14253 Flexible Connector 1
30 14511 Ignitor Bracket 1
31 14528 Brass Elbow Fitting 1
32 104506-25 Orifice 1
33 14544 Aluminum Tubing Assembly 1
34 26808 Valve Bracket 1
35 26827 Switch Bracket 1
36 108346-01 Grate Base 1
37 108376-01 Burner Tube 1
38 108084-02 Pilot Assembly (Natural Gas) 1
39 108755-01 Pilot Bracket 1
40 108373-01 Burner Base Assembly 1
41 108330-01 Burner Pan Assembly 1
42 104506-24 Orifice 1
** Not a field replaceable part.
† Optional - See page 23.
PART
NUMBER
25487 Lava Rock 1
110251-01 Micro Switch Assembly
27253 Notice Label 1
111007-01
DESCRIPTION QTY.
Rear Refractory† 1
PARTS AVAILABLE NOT SHOWN
Gas Conversion Kit 1
1
111916-01F 21
www.desatech.com
SPECIFICATIONS
Thermocouple
Incoming
Main
Gas
Supply
Piezo Ignitor
Control
Valve
Electrical Rating:
120v, 60Hz, 0.7A
Optional Wiring Diagram
For Fan Kit
Pilot
TH
TP
TPTH
Thermopile
Piezo Ignitor
Do Not
Connect
To 120V
(Remote Switch
Field Supplied)
Safety Microswitch for
Models CD32M-2, CD36M-A2
and CD42M-A2 Only
Pilot
Gas Line
Wireway
GND
BLK
WHT
GRN
Incoming
120V AC
(Fuse Box
or
Breaker)
Connectors
(Not Supplied)
Field Wire
N.O.SW
CD32M CD36M-A CD42M-A
Gas Rate (Natural) 12,000/
18,000 Btu/hr
Gas Rate (Propane/LP) 11,000/
17,000 Btu/hr
15,000/
22,000 Btu/hr
14,000/
20,000 Btu/hr
25,000/
35,000 Btu/hr
23,000/
33,000 Btu/hr
Ignition Piezo Piezo Piezo
Natural Gas Manifold Pressure 3.5" w.c. 3.5" w.c. 3.5"w.c.
Propane/LP Manifold Pressure 10" w.c. 10" w.c. 10" w.c.
Minimum Inlet Supply Pressure 4.5" w.c. 4.5" w.c. 4.5" w.c.
WIRING DIAGRAM
22
www.desatech.com
111916-01F
P/N 104506-20
P/N 104506-20
P/N 110994-01 (CD36M-A SERIES)
P/N 108328-01 (CD42M-A)
USED ON BLOWER ONLY
P/N 00710 (OPTIONAL)
REMOTE CONTROL KIT
P/N 108892-01 (CD32M SERIES)
GLASS DOOR ASSEMBLY
ORIFICE #56 (LP)
PAN BURNER
P/N 104506-24
ORIFICE #46(NAT)
ORIFICE #47(NA
T)
ORIFICE #56 (LP)
P/N 104506-25
TUBE BURNER
CD42M-A
CD36M-A
SERIES
ORIFICE #43 (NAT)
ORIFICE #55 (LP)
P/N 14514
P/N 14496
ORIFICE #55 (LP)
P/N 14514
P/N 104506-25
ORIFICE #47(NA
T)
CD32M SERIES
107840-01 (CD42M-A)
108440-01 (CD32M SERIES)
12105 (CD36M-A SERIES)
SCREEN
ROD
108719-01 (CD36M SERIES)
108455-01 (CD42M)
109479-01 (CD32M SERIES)
BK
BLOWER KIT
REGULAR
TRANSMITTER
TRANSMITTER
RECEIVER
RECEIVER
TRANSMITTER
STANDARD REMOTE CONTROL KIT
P/N 14187 (MILLIVOLT ONLY
)
RECEIVER AND TRANSMITTER)
RECEIVER
P/N 00825 (ELECTRONIC ONLY)
(BA
TTERY REQUIRED FOR
TRANSMITTER)
OPTIONAL REMOTE CONTROL KIT
(BATTERIES REQUIRED FOR
PIEZO IGNITOR
P/N 14492
108085-01 #51 NAT
108085-02 #30 LP
PILOT ORIFICE
CD36M-A2, AND CD42M-A2 ONLY
FOR MODELS CD32M-2,
P/N 108331-03 (CD42M-A)
P/N 108903-03 (CD32M SERIES)
BOTTOM LOUVER
P/N 108011-03 (CD36M-A SERIES)
STANDARD
VALVE
PILOT ASSY.
PN 108084-02 (NG)
P/N 110251-01
MICRO SWITCH ASSEMBLY
TPTH
TP
TH
P/N #14389
P/N 108903-01 (CD32M SERIES)
P/N 108331-01 (CD42M-A)
P/N 108011-01 (CD36M-A SERIES)
CD36M-A, CD36M-A2 AND CD42M-A
FOR MODELS CD32M, CD32M-2
STANDARD TOP LOUVER
MILLIVOLT
O
O
F
F
P
I
L
ON
T
O
L
T
I
P
HI-LO
ACCESSORY AND REPLACEMENT PARTS
111916-01F 23
www.desatech.com
111916 01
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
NOT A UPC
111916-01
Rev. F
04/05
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