Desa CVDA24M User manual
For more information, visit www.desatech.com
ANSI Z21.60
CSA 2.26
APPROVED
Convertible from Natural Gas to Propane/LP Gas
GAS LOG VENTED DECORATIVE APPLIANCE
OWNER'S OPERATION AND INSTALLATION MANUAL
WARNING: If the information in this manual is not
—
and liquids in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
department.
— Installation and service must be performed by a quali-
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
CVDA18M, CVDA24M, CPVSA18M AND CPVSA24M
PFS
®
USC
www.desatech.com 901268-01H2
SAFETy
WARNING: Improper instal-
service, or maintenance can
Refer to this manual for correct
installation and operational
procedures. For assistance or
additional information consult
a qualified installer, service
WARNING: This appliance
is for installation only in a
constructed of noncombustible
material, and connected to a
from the room in which it is in-
stalled. Provisions for adequate
combustion and ventilation air
must be provided. Refer to the
National Fuel Gas Codes, ANSI
Z233.1/NFPA 54,Air for Combus-
tion and Ventilation.
WARNING: This product
contains chemicals known to
the State of California to cause
cancer or birth defects, or other
reproductive harm.
manualcarefullyandcompletely
-
from burns, fire, explosion,
electrical shock, and carbon
DANGER: Carbon monoxide
Early signs
of carbon monoxide poisoning resemble the
u, with headaches, dizziness, or nausea. If
you have these signs, the log set may not
be working properly.
Have log set serviced. Some people are
more affected by carbon monoxide than oth-
ers. These include pregnant women, people
with heart or lung disease or anemia, those
under the inuence of alcohol, and those at
high altitudes.
Natural and Propane/LP Gas: Natural and
propane/LP gases are odorless. An odor-
making agent is added to the gas. The odor
helps you detect a gas leak. However, the
odor added to the gas can fade. Gas may be
present even though no odor exists.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this log set.
TAbLE OF CONTENTS
Safety .................................................................. 2
Product Identication ........................................... 4
Local Codes......................................................... 4
Product Feature ................................................... 4
Unpacking............................................................ 4
Operation ........................................................... 10
Inspecting Burners ............................................ 12
Cleaning and Maintenance ................................ 12
Service Hints ..................................................... 12
Technical Service............................................... 12
Troubleshooting ................................................. 13
PARTS ............................................................... 16
Replacement Parts ............................................ 20
Accessories ....................................................... 20
Warranty ..............................................Back Cover
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901268-01H 3
9. Do not use a blower insert, heat exchang-
er insert or other accessory not approved
for use with this log set.
10.
The installation and provisions for com-
bustion and ventilation air must conform
with the National Fuel Gas Codes, ANSI
Z233.1/NFPA 54, Air for Combustion and
Ventilation.
11. Do not run log set
• where combustible materials, gasoline
and other ammable vapors and liquids
are used or stored
• under dusty conditions
12. Do not burn solid fuel in the replace after
installing the log set. Do not use this log
set to cook food or burn paper or other
objects.
13. Log set becomes very hot when in use.
Keep children and adults away from hot
surface to avoid burns or clothing ignition.
Log set will remain hot for a time after
shut-down. Allow surface to cool before
touching.
14. Carefully supervise young children when
they are in the room with log set.
15. Do not use this appliance if any part has
been under water. Immediately call a
qualied service technician to inspect the
appliance and to replace any part of the
control system and any gas control which
has been under water.
16. To help prevent breakage, new logs must
be broken-in (see Curing Logs, page 11).
17. Turn log set off and let cool before servic-
ing, installing, or repairing. Only a qualied
service person should install, service, or
repair log set.
18. Provide adequate clearances around air
openings.
19. Control knob may be hot when turning
unit off. A 6" extension rod is available
to make the knob more easily accessible
and reduce temperature of control knob
(see Accessories on page 20).
1. This appliance, as supplied, is only for
use with the type of gas indicated on the
rating plate. This appliance is convertible
for use with propane/LP.
2. If you smell gas
• shut off gas supply
• 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 re department
3. Never install the log set
• in a recreational vehicle
• where curtains, furniture, clothing, or
other ammable objects are less than
42" from the front, top, or sides of the
log set
• in high trafc areas
• in windy or drafty areas
4. Before installing in a solid fuel burning re-
place, the chimney ue and rebox must
be cleaned of soot, creosote, ashes and
loose paint by a qualied chimney cleaner.
Creosote will ignite if highly heated. In-
spect chimney ue for damage.
5. You must operate this log set with replace
doors or screens in place and fully closed.
Unless provided by other means, replace
doors or screens shall have openings for
introduction of combustion air.
6. This log set is designed to be smokeless.
If logs ever appear to smoke, turn off appli-
ance and call a qualied service person.
Note: During initial operation, slight smok-
ing could occur due to log curing and
the burning of manufacturing residues.
You may wish to add more ventilation by
opening a window.
7. To reduce the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 12.
8. Do not allow fans to blow directly into the
replace. Avoid any drafts that alter burner
ame patterns. Ceiling fans can create
drafts that alter burner ame patterns.
Altered burner patterns can increase
sooting.
SAFETy
Continued
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Hearth Kit Model _____________________
Serial Number _______________________
Log Set Model _______________________
LOCAL CODES
Install and use log set with care. Follow all
local codes. In the absence of local codes,
use the latest edition of The National Fuel
Gas Code ANSI Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
PRODUCT FEATURE
ON/OFF SAFETY VALVE/PILOT
Unit is tested and approved to ANSI Z21.60
and CSA 2.26 as a vented decorative appli-
ance. It is supplied with the parts and instruc-
tions to convert to propane/LP gas use.
Figure 1 - Product Identication
Grate
Burner
Pan
Burner
Manifold
Burner
Clamp
Grate Steps
UNPACkING
must be cleaned of soot, creo-
sote, ashes and loose paint by
a qualified chimney cleaner.
createanddistributesootwithin
PRODUCT
IDENTIFICATION
CAUTION:Donotremovethe
metaldataplatesfromtheburner
pan. The data plates contain
important warranty and safety
information.
1. Remove logs, hearth kit, pan materials,
and hardware from carton.
2. Remove all protective packaging applied
to logs and base for shipment.
3. Check heater for any shipping damage. If
heater is damaged call DESA Heating, LLC
at 1-866-672-6040 for replacement parts
before returning to dealer.
INSTALLATION
WARNING: The Massachu-
setts State Board requires all
installations be performed by
a Licensed Plumber or Gas Fit-
ter. Massachusetts state code
requires all vent dampers be
welded open or removed.
CAUTION: Do not remove
the data plates attached to the
burner pan. The data plates
contain important warranty and
safety information.
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901268-01H 5
Figure 2 - Technical Information Charts
INSTALLATION
Continued
NOTICE:Installation,service,and
repair of this appliance must be
factory authorized components
listed in these instructions may
be used in accordance with the
all codes and requirements of
useofunauthorizedcomponents
or accessory items will void the
result in a hazardous condition.
FLUE OPENING SPECIFICATIONS
Note: This vented appliance must be installed
only in a solid-fuel burning replace with a
working ue and constructed of noncombus-
tible material.
The charts in Figure 2 indicate technical
information regarding the installation of your
gas log set. Please make sure that all of the
specications shown are applicable before
installation is attempted.
The replace must include a working ue and
venting system with the minimum openings
shown in the Figure 2.
MINIMUM FIREBOX SIZES
LOG
SIZE
FRONT
WIDTH
BACK
WIDTH* DEPTH HEIGHT
MINIMUM
FLUE SIZE
18" 34" 16" 14" 18" 8" dia.
24" 35 3/4" 17" 15 1/2" 18" 8" dia.
* At depth indicated
DESCRIPTION
Btu/Hr Input
Natural Gas
Btu/Hr Input
Propane/LP Gas
Natural Propane/LP
In. Num. In. Num.
18" Single Burner 50,000 40,000 0.116 32 0.081 46
24" Single Burner 60,000 50,000 0.120 31 0.082 45
18" Dual Burner 55,000 45,000 0.116 32 0.082 45
24" Dual Burner 65,000 55,000 0.138 29 0.086 44
FUEL INLET
PRESSURE
MANIFOLD
PRESSURE
Min. Max.
NG 7" W.C. 10.5"
W.C.
6
LP 11" W.C. 14" W.C. 10
CHECK GAS TYPE
Use only natural gas. If your gas supply is
not natural gas, you must convert the appli-
ance to propane/LP. Follow the instructions
on page 8.
If the replace does not have a gas supply
shutoff valve, one must be installed.
VENTING SPECIFICATIONS FOR
INSTALLATION
The replace chimney ue and vent must be
drafting properly. To check the vent for proper
drafting: Light a tightly rolled newspaper on
one end and place it at the inside front edge
of the replace. Observe the smoke and be
sure the vent is properly drawing it up the
chimney. If the smoke spills out into the room,
extinguish the ame and remove any obstruc-
tion until proper venting is achieved.
The chimney ue damper must be xed open
to provide a minimum of 81 sq. in. of free air
opening during operation of this log set. A
multipurpose damper clamp is provided to x
the damper in position.
The minimum ue sizes shown in Figure 2
are based on a 6' chimney height using round
pipe. Your minimum ue size will vary based
on input rate and chimney height. Refer to the
National Fuel Gas Code ANSI Z223.1/NFPA
54, Section 6.6, for details.
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INSTALLATION
Continued
INSTALLING DAMPER CLAMP
Secure the damper stop clamp provided to
the leading edge of the damper as shown in
Figure 3. If for any reason this clamp doesn't
work on your replace, another suitable clamp
or permanent stop must be installed, or the
damper blade must be cut or removed.
Figure 3 - Attaching Damper Clamp
CONNECTING TO GAS SUPPLY
-
local codes.
Installation Items Needed
Before installing log set, make sure you have
the items listed below.
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve
• adjustable (crescent) wrench or pliers
• sediment trap
• tee joint
• pipe wrench
Figure 4 - Gas Connection
* Purchase the optional CSA design-certied
equipment shutoff valve from your dealer.
** Minimum inlet pressure for purpose of input
adjustment.
3" Minimum
From Gas
Meter (5"
W.C.** to
10.5" W.C.
Pressure)
CSA Design-
Certied Equipment
Shutoff Valve With
1/8" NPT Tap*
Approved Flexible
Gas Hose (no longer
than 36" if required by
local codes)
Damper
Damper
Clamp
Damper
Manufactured FireplaceMasonry Fireplace
Damper
Clamp
Damper
Tee Pipe Cap
Joint Nipple
Sediment Trap
CAUTION: Use only new,
black iron or steel pipe. Inter-
be used in certain areas. Check
your local codes. Use pipe of
pipe is too small, undue loss of
volume will occur.
Installation must include an equipment shutoff
valve with "T" style handle, gas union and, for
propane/LP gas only, a plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from log
set (see Figure 4).
IMPORTANT: Install equipment shutoff valve
in an accessible location. The equipment
shutoff valve is for turning on or shutting off
the gas to the appliance.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could
result in a clogged burner injector.
sealant that is resistant to liquid
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901268-01H 7
INSTALLATION
Continued
We recommend that you install a sediment trap
in the supply line as shown in Figure 4, page 6.
Locate sediment trap where it is within reach
for cleaning. Install in piping system between
fuel supply and heater. Locate sediment trap
where trapped matter is not likely to freeze.
A sediment trap traps moisture and contami-
nants. This keeps them from going into log set
controls. If sediment trap is not installed or is
installed wrong, log set may not run properly.
CHECKING GAS CONNECTIONS
and connections, internal and
external to unit, for leaks after
all leaks at once.
WARNING:Neveruseanopen
a leak. Correct all leaks at once.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
1. Disconnect log set and its individual
equipment shutoff valve from gas supply
piping system.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
3. Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
4. Check all joints of gas supply piping system.
Apply a noncorrosive leak detection uid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect log set and equipment shutoff
valve to gas supply. Check reconnected
ttings for leaks.
Test Pressures Equal To or Less Than
1. Close equipment shutoff valve (see
Figure 5).
2. Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
Figure 5 - Checking Gas Joints
Gas Meter
Equipment
Shutoff Valve
3. Check all joints from gas meter to equip-
ment shutoff valve (see Figure 5). Apply
a noncorrosive leak detection uid to all
joints. Bubbles forming show a leak.
4. Correct all leaks at once.
HEARTH PAN INSTALLATION
If using propane/LP gas, see Propane/LP
Gas Conversion on page 8, before installing
hearth pan.
1. Place burner pan assembly in center of
replace oor. Make sure front of pan
faces forward.
2. Thread gas supply tting to replace gas
supply pipe. Adjust to most convenient
position.
3. Install gas connector tube to gas supply
adapter. Carefully shape tube and attach
to gas inlet tting (see Figure 6). Be care-
ful not to cause kinks in tube.
4. Test for leaks following instructions under
Testing Burner for Leaks, page 9.
5. Retighten and adjust location of gas control
as necessary. Gas control should be level,
with control rod to the front.
Figure 6 - Installing Inlet Fitting and Gas
Connector Tube (Valve Cover Removed
for Clarity)
Gas Connector
Tube
Gas Control
Valve
Regulator
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INSTALLATION
Continued
Propane/LP Gas Conversion
To convert to propane/LP gas, burner inlet
fitting and pilot orifice must be replaced
and regulator pressure must be reset. Pro-
pane/LP burner inlet tting is supplied with
orice installed. Propane/LP pilot orice for
converting pilot is supplied and is marked
with a red stripe.
1. Remove control rod extension and piezo
ignitor by pulling gently.
2. Remove screws that attach pilot assembly
to valve cover and valve cover to burner
pan (see Figure 7).
3. Remove valve cover.
4. Using a wrench, remove gas control valve
and burner inlet tting by turning counter-
clockwise (see Figure 8).
Figure 9 - Burner Inlet Fittings with
Injectors
NATURAL
GAS
FITTING
PROPANE/LP
GAS FITTING
Injector
for Natural
Gas
Injector for
Propane/LP
Gas
5. Remove burner inlet tting from gas control
assembly (see Figure 8). DO NOT remove
orice from this tting. Propane/LP burner
inlet tting is included in hardware kit (see
Figure 9).
6. Be sure to use correct orice for your
appliance. Orice kit included with this
appliance contains an orice installed in
an air mixer tting.
7. Using thread sealant (resistant to the ac-
tion of propane/LP gas) on smaller end of
tting, screw burner inlet tting into outlet
side of gas control (see Figure 8). Tighten
using a wrench.
8. Thread gas control valve and burner inlet
tting into burner manifold (see Figure 8).
Use thread sealant on male threads of
burner inlet tting. Secure with a wrench.
Make sure control rod is facing the front
(see Figure 8).
9. To adjust regulator pressure, remove
the brass hex plug from regulator (see
Figure 10).
10. Remove the plastic pressure button from
the brass plug (see Figure 10).
11. Reverse the plastic pressure button
and replace it into the brass plug (see
Figure 10).
Piezo
Ignitor
Control Rod
Extension
Screw
Valve Cover
Control
Knob
Figure 7 - Removing/Installing Cover,
Control Knob, and Piezo Ignitor
Thermocouple
Ignitor
Pilot
Figure 8- Remove Burner Inlet Fitting
Burner Inlet
Fitting for
Natural Gas
Control Rod
Control
Valve
Figure 10 - Adjusting Regulator Pressure
for Conversion
Reversed
Plastic Pressure
Button for
Propane/LP
Conversion
Plastic Pressure
Button Positioned
for Natural Gas
Regulator
Brass Plug
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901268-01H 9
12. Replace brass plug into regulator.
13. Using two screws removed in step 2, page
8, replace valve cover.
14. Gently loosen and remove the pilot line
connection from the pilot bracket (see
Figure 11).
15. Replace injector with propane/LP injector
with red stripe.
16. Replace and tighten pilot line to bracket.
17. Using screws removed in step 2, page 8,
reattach pilot bracket to valve cover.
18. Continue with step 1 under Hearth Pan
Installation, page 7.
INSTALLATION
Continued
Figure 11 - Installing Propane/LP Pilot
Orice
Pilot Injector
Pilot Adjustment
Screw
Pilot
Bracket
TESTING BURNER FOR LEAKS
1. Generously apply soapy solution to all
connections.
WARNING: Never check for
2. Light burner with the shutoff valve no
more than half open and holding a match
slightly in front of the pan (see Lighting
Instructions, page 11).
3. Inspect all connections for bubbles,
raw gas odor, or ame from any area
other than the burner (leaks). If leaks
are detected, shut off gas valve imme-
diately. Tighten, or reassemble loose
connection(s) using pipe joint compound
until burner system is leak free.
4. When burner is tested and leak free,
observe the individual tongues of ame
on the burner.
Note: The burner design includes more
ports on the outside of the bar. Make
sure that all ports are clear and produc-
ing ame evenly across the burner. If
any ports appear blocked, clear them by
removing the burner manifold and ream-
ing the ports with a modied paper clip or
other suitable tool.
5. When nished testing, turn gas shutoff
valve OFF to extinguish all ames.
ADDING PAN MATERIAL
1. Open bag of ash bed material (vermiculite)
and spread it evenly across burner pan to
the top. You may overow front and sides
of pan to cover entire pan. Do not cover
valve or inlet tting.
2. Open glowing embers and evenly cover
ash bed material (vermiculite) in the
burner pan.
INSTALLING GRATE AND LOGS
1. Place grate over burner pan where the
two outer horizontal supports on the grate
t into the two pan positioning notches in
the rear vertical edge of pan.
2. Slide two rear log grate steps over the
two outer horizontal supports on grate as
shown in Figure 12.
3. Place back log on grate onto grate steps
(see Figure 13, page 10).
4. Place front log(s) on grate and slide for-
ward against front bars on the grate (see
Figure 13, page 10).
5. Place smaller top logs onto bottom logs (see
Figure 14, page 10). Leave as much open
space between logs as possible to minimize
ame impingement and sooting.
Note: Logs may chip if they are handled
roughly or if hit together while being
placed.
Figure 12 - Installing Grate (Pan Material
Not Shown)
Grate
Grate Steps
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INSTALLATION
Continued
Figure 13 - Installing Front and Back
Logs (Number and style of your logs
may vary)
Figure 14 - Placement of Top Logs
OPERATION
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
-
A. This appliance has a pilot which must
-
lot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around
WHAT TO DO IF YOU SMELL GAS
C. Use only your hand to push in or turn
If the knob will not push in or turn by
-
Force or attempted repair may result in
D. Do not use this appliance if any part has
been under water. Immediately call a
the appliance and to replace any part of
which has been under water.
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901268-01H 11
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information, col-
umn 1.
2. Make sure equipment shutoff valve is fully
open.
3. Press in and turn control knob clockwise
to the OFF position.
4. Wait ve (5) minutes to clear out any gas.
Then smell for gas, including near the
oor. If you smell gas, STOP! Follow “B”
in the safety information, column 1. If you
don’t smell gas, go to the next step.
5. Turn control knob counterclockwise
to the PILOT position and press
in. Keep control knob pressed in for ve
(5) seconds.
Note: You may be running this log set
for the rst time after hooking up to gas
supply. If so, the control knob may need
to be pressed in for 30 seconds or more.
This will allow air to bleed from the gas
system.
• If control knob does not pop up when
released, contact a qualified service
person or gas supplier for repairs.
6. With control knob pressed in, push down
and release ignitor button. This will light
pilot. Visually locate the pilot on the control
valve cover by the edge of the burner pan
to look for ame. If needed, keep pressing
ignitor button until pilot lights.
Note: If the pilot will not stay lit after
several tries, turn the gas control knob to
OFF and call your service technician or
gas supplier.
7. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob.
Note: If pilot goes out, repeat steps 3
through 7.
8. Turn control knob counterclockwise
to the ON position. Burner should light.
If burner does not light, call a qualied
service person.
9. To leave pilot lit and shut off burners only,
turn control knob clockwise to the
PILOT position.
Ignitor
Figure 15 - Ignitor and Control Knob
Pilot
Burner
Thermocouple
Pilot
FROM "PILOT" POSITION
SLIGHT PUSH TO
TURN OFF
PULL PUSH
ON
ON
FROM "PILOT" POSITION
SLIGHT PUSH TO
TURN OFF
PULL PUSH
FROM "PILOT" POSITION
SLIGHT PUSH TO
TURN OFF
PULL PUSH
ON OFF
On Off
OFF
OFF
Figure 16 - Thermocouple and Pilot
Control Knob
OPERATION
Continued
TO TURN OFF GAS
TO APPLIANCE
1. Turn control knob clockwise to the
PILOT position.
2. Press in and turn control clockwise
to the OFF position.
3. Close equipment shutoff valve (see Figure
5, page 7).
CURING
LOGS
During 2-3 hour appliance break-in period,
you may detect an odor from the appliance
as various paints and compounds used in
manufacturing of this log set cure. This is a
normal and temporary situation that is not
cause for alarm. However, you may want to
provide extra ventilation to the room during
this time.
To ensure proper curing of logs:
• Ignite a 2" flame and maintain it for 1
hour.
• Burn logs in consecutive 1 hour periods
raising ame an additional 2" to full ame
height for a total of three hours.
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INSPECTING bURNERS
Figure 18 - Typical Flame Pattern
CLEANING AND MAINTENANCE
Thermocouple
Figure 17 - Correct Pilot Flame Pattern
Pilot
BURNER FLAME PATTERN
Burner ames will be steady, not lifting or
oating. Flames should go up through middle
of logset. Flames should not "spill" to edges
of pan or sides of logset.
Figure 18 shows a typical ame pattern. If
burner ame pattern differs from that de-
scribed:
• turn appliance off (see To Turn Off Gas to
Appliance, page 11)
• see Troubleshooting, page 13
Check pilot ame pattern and burner ame
patterns often.
PILOT ASSEMBLY
The pilot assembly is factory preset for proper
ame height. Alterations may have occurred
during shipping and handling. The pilot is
located on the back right hand side of the
burner.
The thermocouple should be fully enveloped
in ame. The ame should not be lifting off of
thermocouple element.
If your pilot assembly does not meet these
requirements:
• Access pilot adjustment screw through
slot in valve cover. Turn adjustment screw
clockwise to decrease or counterclockwise
to increase the ame to proper size (see
Figure 11, page 9). Do not remove adjust-
ment screw.
• see Troubleshooting, page 13
• Keep the area around the log set clean and
clear of debris.
• Occasionally, you may use a soft bristle
brush to clean logs.
• Periodically inspect the air mixer and burner
tube for foreign matter blocking the air inlet
and ame holes.
• Once every year a qualied agency or certi-
ed chimney sweep should examine and
clean the venting system of the replace.
SERVICE HINTS
When Gas Pressure is Too Low
• pilot will not stay lit
• burners will have delayed ignition
• heater will not produce specied heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If
so, contact your local natural gas supplier.
TECHNICAL SERVICE
You may have further questions about installa-
tion, operation, or troubleshooting. If so, con-
tact DESA Heating, LLC at 1-866-672-6040.
When calling please have your model and
serial numbers of your heater ready.
You can also visit DESA Heating, LLC’s web
site at www.desatech.com.
www.desatech.com
901268-01H 13
POSSIBLE CAUSE
1. Poor fuel quality
2. Fireplace venting system
not drafting properly
3. Excessive ame impinge-
ment or blockage
4. Improper fuel/air mixture
5. Excessive gas supply/pres-
sure
1. Passage of air/gas across
irregular surfaces
2. Excessive gas pressure on
natural gas units
1. Incorrect gas supply or
pressure
2. Blocked burner orifice or
burner manifold ports
3. Improper burner orifice
size
1. Ignitor electrode not con-
nected to ignitor cable
2. Ignitor cable pinched or
wet
3. Bad ground on piezo ignitor
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ignitor electrode broken
7. Ignitor electrode positioned
wrong
REMEDY
1. Contact local natural or
propane/LP gas company
2. Adjust damper wide open
and/or have replace and
venting professionally
cleaned and checked
3. Separate the logs to allow
more ame passage
4. Remove any foreign items
from the ame pattern and/
or check for proper orice
sizing
5. Preheat ue in very cold
weather
1. Relieve any tight bends or
kinks in gas supply line
2. Check/reset gas regulator
pressure (see Figure 10,
page 8)
1. Check for proper gas sup-
ply pressure
2. Free burner orifice and
manifold ports of any burrs,
paint, or other blockage
3. Verify proper burner ori-
fice sizing (see Figure 2,
page 5)
1. Reconnect ignitor cable
2. Free ignitor cable if pinched
by any metal or tubing.
Keep ignitor cable dry
3. Scrape away paint on brack-
et for better contact with
ground on piezo ignitor
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace electrode
7. Reposition electrode
OBSERVED PROBLEM
Log set is smoking/sooting
excessively
(Note: It is natural and un-
avoidable for vented gas log
sets to produce moderate
levels of carbon (soot) where
flames contact the logs.
This is especially true with
propane/LP gas.)
Burner is excessively noisy
(Note: The movement and
combustion of gas will cre-
ate low, unavoidable levels
of noise.)
Burner ame is too low or
too high
When ignitor button is
pressed, there is no spark
at pilot
TROUbLESHOOTING
Note: All troubleshooting items are listed in order of operation.
www.desatech.com 901268-01H14
TROUbLESHOOTING
Continued
POSSIBLE CAUSE
1. Gas supply turned off or
equipment shutoff valve
closed
2. Control knob not in PILOT
position
3. Control knob not pressed in
while in PILOT position
4. Air in gas lines when
installed
5. Pilot adjustment screw
closed
6. Pilot is clogged
7. Low gas pressure
1.
Control knob not fully
pressed in
2. Control knob not pressed in
long enough
3. Equipment shutoff valve not
fully open
4. Pilot flame not touching
thermocouple, which al-
lows thermocouple to cool,
causing pilot ame to go
out. This problem could be
caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged
pilot
5. Thermocouple connection
loose at control valve
6. Thermocouple damaged
7. Control valve damaged
1. Burner orice clogged
2. Inlet gas pressure is too
low
3. Burner orice diameter is
too small
4.
Thermocouple leads discon-
nected or improperly con-
nected
1. Pilot ame needs adjusting
2. Wrong pilot orice
REMEDY
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while
in PILOT position
4. Continue holding down con-
trol knob. Repeat igniting op-
eration until air is removed
5. Adjust pilot ame for ap-
proximately 2" blue ame
6. Clean pilot (see Cleaning
and Maintenance, page 12)
or replace pilot assembly
7. Replace gas control
1. Press in control knob fully
2. After pilot lights, keep con-
trol knob pressed in 30
seconds
3. Fully open equipment shut-
off valve
4. A) Contact local natural gas
company
B) Clean pilot (see Cleaning
and Maintenance, page 12)
or replace pilot assembly
5. Hand tighten until snug,
then tighten 1/4 turn more
6. Replace thermocouple
7. Replace control valve
1. Clean burner orice
2. Contact local natural or
propane/LP gas company
3. Replace burner orice
4. Reconnect leads
1. Adjust pilot ame for ap-
proximately 2" blue ame
2. Replace pilot orice set
OBSERVED PROBLEM
When ignitor button is
pressed, there is spark at
pilot but no ignition
Pilot lights but ame goes
out when control knob is
released
Burner does not light after
pilot is lit
Delayed ignition burner
www.desatech.com
901268-01H 15
POSSIBLE CAUSE
1. Metal expanding while
heating or contracting while
cooling
1. Log Set burning vapors
from paint, hair spray,
glues, cleaners, chemi-
cals, new carpet, etc. (See
IMPORTANT statement
above)
2. Gas leak.
1. Gas leak.
2. Control valve defective
1. Gas leak.
REMEDY
1. This is normal with most log
sets. If noise is excessive,
contact qualified service
person
1. Open flue to maximum.
Stop using odor causing
products while log set is
running
2. Locate and correct all leaks
(see Checking Gas Con-
nections, page 7)
1. Locate and correct all leaks
(see Checking Gas Con-
nections, page 7)
2. Replace control valve
1. Locate and correct all leaks
(see Checking Gas Con-
nections, page 7)
OBSERVED PROBLEM
Log set produces a clicking/
ticking noise just after burner
is lit or shut off
Log set produces unwanted
odors
Gas odor even when control
knob is in OFF position
Gas odor during combustion
-
IMPORTANT: Operating log set where impurities in air exist may create odors. Cleaning sup-
plies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc.,
create fumes. These fumes may mix with combustion air and create odors. These odors will
disappear over time.
TROUbLESHOOTING
Continued
www.desatech.com 901268-01H16
PARTS
MODELS CVDA18M AND CVDA24M
3
26
14
8
2
25
15
16
17
13
20
21
18
24
19
6
4
17
22
34
23
10
7
5
9
9
11
12
1
27
27
33
32 31
28
29
30
www.desatech.com
901268-01H 17
PARTS
This list contains replaceable parts used in your log set. When ordering parts, follow the
instructions listed under Replacement Parts on page 20 of this manual.
KEY
NO. PART NO. DESCRIPTION QTY.
1 901056-01 Brass 3/8 FLR x 1/2 FPT • • 1
2 14264 Brass 3/8 FLR x 3/8 MPT Elbow • • 1
3 901066-01 Brass Air Mixer - Natural Gas • • 1
4 901064-07 Natural Gas Injector • 1
901064-08 Natural Gas Injector • 1
5 901207-01 Burner Manifold • 1
901207-02 Burner Manifold • 1
6 901137-01 Burner Pan • 1
901137-02 Burner Pan • 1
7 901242-01 Damper Clamp - Std. Assembly • • 1
8 101628-01 Gas Line - 10" Flexible • • 1
9 901431-01 Grate Steps • • 2
10 901246-01 Log Grate • 1
901246-02 Log Grate • 1
11 901681-01 Burner Strap • • 1
12 901078-01 Nut #8/32 • • 1
13 901076-01 Screw #8/32 x 3/8 • • 4
14 901082-01 Regulator • • 1
15 901066-02 Propane/LP Brass Air Mixer • • 1
16 901065-05 Propane/LP Brass Orice • 1
901065-03 Propane/LP Brass Orice • 1
17 901075-01 Screw 1/4" #8 “B” pt • • 4
18 901079-01 Pilot Valve Control Dial • • 1
19 901080-01 Pilot Valve Dial Extension 3" • • 1
20 097159-04 Piezo Igniter • • 1
21 901068-02 Manual Valve • • 1
22 901069-01 Pilot Burner (with natural gas orice) • • 1
23 901072-01 Piezo Igniter Electrode • • 1
24 901140-01 Steel Shroud • • 1
25 901042-01 Control Dial Instructions • • 1
26 901062-01 Brass 3/8 MPT x 3/8 MPT Elbow • • 1
27 901461-01 Bottom Front Log (CC-8) • 2
901111-02 Bottom Front Log (CC-13) • 2
28 901111-01 Bottom Rear Log (CS-15) • 1
901111-02 Bottom Rear Log (CS-20) • 1
29 901120-01 Top Log (VCR-11) • • 1
30 901118-01 Top Log (VCR-9) • • 1
31 901101-01 Top Log (CHR-13) • 1
32 901089-01 Top Log (CS-12) • • 1
33 901094-01 Top Log (CPR-13) • • 1
34 901070-01 Propane/LP Pilot Burner Orice • • 1
PARTS AVAILABLE — NOT SHOWN
901156-01 0.4# Bag Embers • • 1
901155-01 1.0# Bag Ash Bed Material (Vermiculite) • • 1
CVDA18M
CVDA24M
www.desatech.com 901268-01H18
PARTS
MODELS CPVSA18M AND CPVSA24M
3
23
11
8
2
22
12
13
14
17
18
15
21
16
6
4
14
19
20
31
10
9
9
1
6
26
24
30
29
28
27
25
7
5
www.desatech.com
901268-01H 19
PARTS
This list contains replaceable parts used in your log set. When ordering parts, follow the
instructions listed under Replacement Parts on page 20 of this manual.
KEY
NO. PART NO. DESCRIPTION QTY.
1 901056-01 Brass 3/8 FLR x 1/2 FPT • • 1
2 14264 Brass 3/8 FLR x 3/8 MPT Elbow • • 1
3 901066-01 Brass Air Mixer - Natural Gas • • 1
4 901064-07 Natural Gas Injector • 1
901064-02 Natural Gas Injector • 1
5 901206-01 Burner Manifold • 1
901206-02 Burner Manifold • 1
6 901136-01 Burner Pan • 1
901136-02 Burner Pan • 1
7 901242-01 Damper Clamp - Std. Assembly • • 1
8 101628-01 Gas Line - 10" Flexible • • 1
9 901431-01 Grate Steps • • 2
10 901246-01 Log Grate • 1
901246-02 Log Grate • 1
11 901082-01 Regulator • • 1
12 901066-02 Propane/LP Brass Air Mixer • • 1
13 901065-06 Propane/LP Brass Orice • 1
901065-05 Propane/LP Brass Orice • 1
14 901075-01 Screw 1/4" #8 “B” pt • • 4
15 901079-01 Pilot Valve Control Dial • • 1
16 901080-01 Pilot Valve Dial Extension 3" • • 1
17 097159-04 Piezo Igniter • • 1
18 901068-02 Manual Valve • • 1
19 901069-01 Pilot Burner (with natural gas orice) • • 1
20 901072-01 Piezo Igniter Electrode • • 1
21 901140-01 Steel Shroud • • 1
22 901042-01 Control Dial Instructions • • 1
23 901062-01 Brass 3/8 MPT x 3/8 MPT Elbow • • 1
24 901460-01 Bottom Front Log (CHR-18) • 1
901460-01 Bottom Front Log (CHR-24) • 1
25 901458-01 Bottom Rear Log (CR-16) • 1
901458-02 Bottom Rear Log (CR-20) • 1
26 901103-01 Top Log (CHR-13Y) • • 1
27 101115-01 Top Log (VR-11) • 1
28 901102-01 Top Log (CHR-10) • • 1
29 901100-01 Top Log (CHR-11) • • 1
30 901101-01 Top Log (CHR-13) • • 1
31 901070-01 Propane/LP Pilot Burner Orice • • 1
PARTS AVAILABLE — NOT SHOWN
901156-01 0.4# Bag Embers • • 1
901155-01 1.0# Bag Ash Bed Material (Vermiculite) • • 1
CPVSA18M
CPVSA24M
www.desatech.com 901268-01H20
Note: Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA Heating, LLC at 1-866-672-6040.
When calling DESA Heating, LLC, have
ready:
• your name
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• purchase date
REPLACEMENT PARTS
Usually, we will ask you to return the part to
the factory.
PARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA Heating, LLC at 1-866-672-6040 for
referral information. A list of authorized dealers
can be found by visiting www.desatech.com.
When calling DESA Heating, LLC, have
ready:
• model and serial numbers of your heater
• the replacement part number
ACCESSORIES
Purchase these accessories from your local
dealer. If they can not supply these accessories
call DESA Heating, LLC at 1-866-672-6040 for
information. You can also write to the address
listed on the back page of this manual.
ASH BED MATERIAL
For all models. Carton of 6.
For all models. Use for rebox decoration
only.
For all models. Use for rebox decoration
only. Carton of 6.
LAVA ROCK - GA6067A
For all models. Use for rebox decoration
only.
DECORATIVE ASH BED CONTROL
COVER CDABKA
For all models. An attractive way to cover
control knob and piezo ignitor.
For all models. Use as replacement for 3"
extension rod provided with logset.
RECEIVER AND HAND-HELD
REMOTE CONTROL KIT - HRC100
SERIES
For all models. Allows the gas log heater to
be turned on and off by using a hand-held
remote control.
WALL MOUNTED THERMOSTAT
CONTROL KIT - GWMT1
For all models. Allows easy wall access to
the operation of your burner system. This
will allow you thermostatic control with the
convenience of a wall switch.
WALL MOUNTED ON/OFF SWITCH
GWMS2
For all models. Allows burner system to be
turned on and off with a wall switch.
For all models. Use for additional decoration
only. (3 pine cones per box).
For all models. Allows conversion from
natural gas to propane/LP gas. Also includes
everything you need to mount controls for
logset under rebox refractory.
This manual suits for next models
2
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