Desa FVMR18 Quick start guide
For more information, visit www.desatech.com
NATURAL GAS LOGS
VENTED DECORATIVE APPLIANCE
OWNER’S OPERATION AND INSTALLATION MANUAL
Vanguard Burner Models VVMR18 and VVMR24
For Use with Vanguard Log Set Models VMLR18 and VMLR24
FMI Burner Models FVMR18 and FVMR24
For Use with FMI Log Set Models FMLR18 and FMLR24
O-TL REPORT # 114-L-31-4
ANSI Z21.84
WARNING: If the information in this manual is not
— WHAT TO DO IF YOU SMELL GAS
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CONSUMER: Retain this manual for future reference.
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SAFETY
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known to the State of California
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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 af-
fected by carbon monoxide than others. These
include pregnant women, people with heart or
lung disease or anemia, those under the inu-
ence of alcohol and those at high altitudes.
Natural Gas: Natural gas is 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.
-
service or maintenance can
Refer to this manual for correct
additional information consult
is for installation only in a
material and connected to a
from the room in which it is in-
National Fuel Gas Codes, ANSI
Z233.1/NFPA 54,Air for Combus-
tion and Ventilation.
local codes.
TABLE OF CONTENTS
Safety .................................................................. 2
Local Codes......................................................... 4
Unpacking............................................................ 4
Product Identication ........................................... 4
Optional Product Features................................... 4
Installation ........................................................... 5
Operation ........................................................... 12
Cleaning and Maintenance ................................ 13
Technical Service............................................... 13
Troubleshooting ................................................. 14
Replacement Parts ............................................ 17
Parts .................................................................. 18
Accessories ....................................................... 22
Warranty ..............................................Back Cover
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1. This appliance, as supplied, is only for
use with the type of gas indicated on the
rating plate. This appliance is convert-
ible for use with propane/LP, using the
GA9050A-1 or GA9150A pilot kit.
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
replace, 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. Inspect chimney ue and rebox
for damage. If damaged, repair ue before
operating heater.
5. You must operate this log set with a re-
place screen in place. Make sure replace
screen is closed before running log set.
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.
SAFETY
Continued
7. To reduce the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 13.
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.
9. Do not use a blower insert, heat exchang-
er insert or other accessory not approved
for use with this log set.
10. This installation and provisions for com-
bustion and ventilation air must conform
to the National Fuel Gas Code, ANSI
Z233.1/NFPA 54, Air for Combustion and
Ventilation.
11. Do not run log set
• where ammable liquids or vapors 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
shutdown. Allow surface to cool before
touching.
14. Carefully supervise young children when
they are in the room with log set.
15. Do not use appliance if any part has been
exposed to or under water. Immediately
call a qualied service technician to in-
spect the room appliance and to replace
any part of the control system (if using
GA9050A-1 or GA9150A) and any gas
control which has been under water.
16. To help prevent breakage, new logs must
be broken-in (see Curing Logs, page 12).
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.
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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
Figure 1 - Product Identication
UNPACKING
CAUTION: Do not remove
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.
Grate
Burner
Pan
Burner Manifold Right Side
Burner
Left Side
Burner Burner Inlet
Fitting
PRODUCT IDENTIFICATION
Hearth Kit Model:____________________
Serial Number:______________________
Log Set Model: _____________________
ON/OFF SAFETY VALVE/PILOT KIT
AND PROPANE/LP CONVERSION
An optional valve/safety pilot kit with a piezo
ignitor is available for this appliance. This sys-
tem requires no matches, batteries or other
sources to light. You must use this optional
system for LP conversion. See Accessories,
page 22.
REMOTE CONTROL READY
An optional millivolt valve/safety pilot kit with
a piezo ignitor is available for this appliance.
This system requires no matches, batteries
or other sources to light. This system may
be connected to a wall switch or hand-held
wireless remote control. See Accessories,
page 22.
REMOTE CONTROL ACCESSORIES
There is an optional hand-held ON/OFF re-
mote control that can be purchased separately
for this log set. You must use the millivolt
valve/safety pilot kit to use remote acces-
sories with this appliance. See Accessories,
page 22.
A wall switch is also available for this appli-
ance. You must use the millivolt valve/safety
pilot kit to use the wall switch with this appli-
ance. See Accessories, page 22.
OPTIONAL PRODUCT FEATURES
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INSTALLATION
CAUTION: Do not remove
-
formation.
-
-
-
NOTICE: Installation, service
-
listed in these instructions may
-
this kit or use of unauthorized
warranty and may 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.
MODEL
Btu/Hr
Natural
Gas
Btu/Hr
LP Gas
Minimum
Vent
VVMR18
FVMR18
18" Multi-Side
55,000 45,000 8" dia.
VVMR24
FVMR24
24" Multi-Side
65,000 55,000 8" dia.
MINIMUM FIREBOX SIZES
LOG
SIZE
FRONT
WIDTH*
BACK
WIDTH**
DEPTH HEIGHT
18" 28" 28" 16" 18"
24" 29 3/4"29 3/4" 16" 18"
**At depth indicated
FUEL INLET PRESSURE
Min. Max.
NG 5.5" 10.5"
LP 11" 13"
Figure 2 - Technical Information Charts
BURNER ORIFICE
Size
Natural
In. Num. In. Num.
18" 0.111 34 0.073 49
24" 0.129 30 0.086 44
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CHECK GAS TYPE
Use only natural gas. If your gas supply is not
natural gas, you must install ON/OFF Safety
Valve/Pilot Kit (see Accessories, page 22).
Call dealer where you bought log set.
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 must remain open a mini-
mum of 3" at all times during the operation
of this log set.
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.
INSTALLATION
Continued
Figure 3 - Attaching Damper Clamp
CONNECTING TO GAS SUPPLY
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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
• test gauge connection
• adjustable (crescent) wrench or pliers
• sediment trap
• tee joint
• pipe wrench
CAUTION: Use only new,
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volume will occur.
Installation must include an equipment shutoff
valve, union and 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).
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
Sediment Trap
From Gas
Meter
(5" W.C.** to
10.5" W.C.
Pressure)
CSA Design-Certied
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved
Gas Hose
Cap Pipe Tee
Nipple Joint
Damper
Damper
Clamp
Damper
Damper
Clamp
Damper
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INSTALLATION
Continued
Figure 5 - Checking Gas Joints
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.
We recommend that you install a sediment
trap in 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 sedi-
ment trap where trapped matter is not likely
to freeze. A sediment trap traps moisture and
contaminants. 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.
a leak. Correct all leaks at once.
System
Test Pressures In Excess Of 1/2 PSIG
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment shutoff valve from gas supply piping
system. Pressures in excess of 1/2 psig
will damage heater regulator.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
Gas Meter
Equipment
Shutoff
Valve
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 sys-
tem. Apply noncorrosive leak detection
uid to gas 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.
1. Close equipment shutoff valve (see Fig-
ure 5).
2. Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
3. Check all joints from gas meter to equip-
ment shutoff valve (see Figure 5). Apply
mixture of liquid soap and water to gas
joints. Bubbles forming show a leak.
4. Correct all leaks at once.
HEARTH KIT ASSEMBLY AND
INSTALLATION
1. Unscrew burner inlet tting from burner
manifold.
2. Place burner manifold in pan with
threaded opening facing open knockout
plug (see Figure 6, page 8). Make sure
the burner ports face downward.
3. Using thread sealant (resistant to the action
of propane/LP gas) on larger end of tting,
screw the burner inlet tting through hole
and into burner manifold. Tighten using
a wrench. If using propane/LP gas, see
Propane/LP Gas Conversion, page 10.
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4. If using optional GA9050A-1 kit, go to
Optional GA9050A-1 ON/OFF Safety
Valve/Pilot Kit section for installation
instructions. If using optional GA9150A
kit, follow instructions included with kit for
installation and operation.
5. Using thread sealant on male threads,
install burner connection fittings into
1/8" NPT holes on each side of burner
manifold.
6. Press right and left side burners onto
burner connection ttings. Burner porting
should face downward (see Figure 6).
Figure 6 - Installing Burner
Burner Inlet Fitting
Burner Manifold
Burner Connection
Fittings
Side
Burners
INSTALLATION
Continued
Installation and Gas Connection
1. Place burner pan assembly in center of
replace oor. Make sure inlet end of pan
faces gas supply.
2. Thread gas supply tting to replace gas
supply pipe. Use thread sealant.
3. Install adapter tting onto burner inlet tting
using thread sealant on male threads of
burner inlet tting (see Figure 7). Adjust to
most convenient position.
4. Install gas connector tube to gas supply
tting. Carefully shape tube to attach to
adapter tting. Be careful not to cause
kinks in tube.
5. Using 1/4" x #8 provided, install cover over
inlet tting.
OFF SAFETY VALVE/PILOT KIT
ASSEMBLY
For additional convenience and safety or for
propane/LP conversion, an optional ON/OFF
Safety Valve/Pilot Kit is available. See Acces-
sories, page 22.
WARNING: You must use a
ON/OFF Safety Valve/Pilot Kit for
Note: The control cover provided with
GA9050A-1 should be discarded and replaced
with control cover provided with log set.
Natural Gas Installation
1. Thread gas control valve onto burner inlet
tting (see Figure 8). Use thread sealant
on male threads of burner inlet tting. Hold
burner inlet tting with a wrench to prevent
overtightening connection to burner. Make
sure control rod is facing the front (see
Figure 8).
Figure 7 - Connecting Gas to Appliance
Adapter Fitting
Gas Connector
Tube
Burner Inlet
Fitting
Gas
Control
Valve
Burner Pan
Assembly
Figure 8 - Installing Gas Control Valve
Control Rod
Burner Pan
Assembly
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INSTALLATION
Continued
Figure 9 - Gas Control Valve with
Thermocouple and Pilot
Thermocouple
and Line
Pilot and
Line
Gas Control Valve
Figure 10 - Installing Inlet Fitting and
Gas Connector Tube
Gas Control
Valve
Gas
Inlet
Fitting
Gas Connector
Tube
Inlet
Opening
2. Attach pilot gas line to pilot outlet of gas
control valve and tighten. Connect ther-
mocouple to rear of gas control valve.
See Figure 9. Do not overtighten. If us-
ing propane/LP gas, see Changing Pilot
Orice, page 10.
3. Install inlet tting into inlet opening of gas
control valve (see Figure 10). Use thread
sealant on male pipe threads.
4. Place burner pan assembly in center of
replace oor. Make sure front of pan
faces the room from which you wish to
control appliance.
5. Thread gas supply tting to replace gas
supply pipe. Adjust to most convenient
position.
6. Install gas connector tube to gas supply
tting. Carefully shape tube to attach to
adapter tting. Be careful not to cause
kinks in tube.
7. Test for leaks following instructions under
Testing Burner for Leaks, page 11.
8. Retighten and adjust location of gas con-
trol as necessary. Gas control should be
level, with control rod to the front.
9. Attach cover, provided with log set, to
burner pan using screws provided.
10. Install thermocouple, pilot and ignitor onto
valve cover as shown in Figure 11. Use
the provided screws.
11. Push control rod extension onto “D”
shaped control rod through center hole
in cover.
Piezo
Ignitor
Control Rod Extension
Screw
Valve
Cover
Control
Knob
Figure 11 - Installing Cover, Control
Knob and Piezo Ignitor
Thermocouple
Pilot
12. Install control position decal and control
knob making sure to align marks with
correct stop positions of gas control. Pilot
position will allow knob to push in about
1/2". Align decals in pilot position.
Ignitor
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INSTALLATION
Continued
To convert to propane/LP gas, burner inlet
tting and pilot orice must be replaced. The
propane/LP burner inlet tting is supplied with
orice installed for a 24" log set. If you have an
18" set, you must change this orice also. See
Figure 1, page 4, for product identication.
1. Remove burner inlet tting from burner
pan assembly (see Figure 12). DO NOT
remove orice from tting. Propane/LP
burner inlet tting is included in hard-
ware kit (see Figure 13).
2. Be sure to use correct orice for your ap-
pliance. The hardware kit included with
this appliance contains two orices with
a cone-like shape. If you have an 18"
set, orice for burner inlet tting is red. If
you have a 24" log set, orice is already
installed inside the tting. The black orice
will not be used in any multi-side unit and
may be discarded.
3. For an 18" set, use a 10 mm socket or nut
driver to remove orice from propane/LP
burner inlet tting. Choose the correct
orice for your log set size and install in
place of orice you just removed.
4. Using thread sealant (resistant to action
of propane/LP gas) on larger end of tting,
screw burner inlet tting through hole
and into burner manifold. Tighten using a
wrench.
5 . Follow steps 1 through 12 under Natural
Gas Installation, page 8.
Figure 13 - Burner Inlet Fittings with
Injectors
Figure 12 - Remove Burner Inlet Fitting
Burner Inlet Fitting
for Natural Gas
Figure 14 - Installing Propane/LP Pilot
Orice
Pilot Injector
The pilot is provided with a natural gas ori-
ce installed. For propane/LP gas you must
remove natural gas orice and replace it with
a propane/LP orice. The hardware kit con-
tains a propane/LP orice with a red stripe for
converting pilot.
1. Gently loosen and remove pilot line connec-
tion from bracket (see Figure 14).
2. Replace injector (see Figure 14) with
propane/LP pilot injector with red stripe.
3. Replace and tighten pilot line to bracket.
4. Continue with step 3 under Natural Gas
Installation, page 8.
NATURAL
GAS
FITTING
PROPANE/
LP GAS
FITTING
Injector for
Natural Gas
Injector for
Propane/LP Gas
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INSTALLATION
Continued
TESTING BURNER FOR LEAKS
1. Generously apply noncorrosive leak de-
tection uid to all connections.
WARNING: Never check for
2. Light burner with shutoff valve no more
than half open and holding a match
slightly in front of pan (see Lighting In-
structions, page 12).
3. Inspect all connections for bubbles, raw
gas odor or ame from any area other
than burner (leaks). If leaks are detected,
shut off gas valve immediately. 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 individual tongues of ame on
burner.
Note: Burner design includes more ports
on outside of the bar. Make sure that
all ports are clear and producing ame
evenly across burner. If any ports appear
blocked, clear them by removing burner
manifold and reaming ports with a modi-
ed paper clip or other suitable tool.
5. When nished testing, turn gas shutoff
valve OFF to extinguish all ames.
ADDING PAN MATERIAL
1. Open bags of ash bed material (vermicu-
lite) and spread it evenly across burner
pan to the top. You may overow front
and sides of pan to cover the entire pan
and connecting hardware. Do not cover
GA9050A-1 or GA9150A valve.
2. Open glowing embers and evenly cover
ash bed material (vermiculite) in burner
pan.
INSTALLING GRATE AND LOGS
1. Place grate over burner pan. Grate should
“lock” into place over corners of pan (see
Figure 15).
2. Place one of the bottom logs on grate
and slide forward against front grate bars.
Repeat for other side (see Figure 16).
Figure 15 - Installing Grate (Pan Material
Not Shown)
Figure 16 - Placement of Bottom Logs
Grate
Burner Pan
Figure 17 - Placement of Top Logs
3. Place smaller top logs onto bottom logs
(see Figure 17). Leave as much open
space between logs as possible to mini-
mize ame impingement and sooting.
Note: Logs may chip if they are handled
roughly or if hit together while being
placed.
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Ignitor
Control Knob Pilot
FROM "PILOT" POSITION
SLIGHT PUSH TO
TURN OFF
PULL PUSH
TO LIGHT
ON
ON
FROM "PILOT" POSITION
SLIGHT PUSH TO
TURN OFF
PULL PUSH
TO LIGHT
FROM "PILOT" POSITION
SLIGHT PUSH TO
TURN OFF
PULL PUSH
TO LIGHT
ON OFF
On Off
OFF
OFF
Figure 18 - Ignitor and Control Knob
OPERATION
Turn gas shutoff valve clockwise to
the OFF position.
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
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-
WHAT TO DO IF YOU SMELL GAS
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information,
above.
2. Turn the gas shutoff valve to OFF.
3. Wait ve (5) minutes to clear out any
gas. If you then smell gas STOP! Follow
the safety information above. If you don‘t
smell gas, go on to the next step.
4. Lay a lit match on top of pan material about
2" from end of supply side of pan.
5. Slowly turn gas shutoff valve ON until
burner ignites. If burner does not ignite
within 10 seconds with match burning,
turn shutoff valve OFF and repeat steps
1 through 4 again.
GAS SHUTOFF
VALVE OPERATION
Adjust the ame ON/OFF by turning the gas
shutoff valve counterclockwise to open
or clockwise to close, as necessary.
CURING
LOGS
During the 2-3 hour appliance break-in period,
you may detect an odor from the appliance
as the various paints and compounds used in
the 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 the logs:
• Ignite a 2" flame and maintain it for 1
hour.
• Burn the logs in consecutive 1 hour periods
raising the ame an additional 2" to full
ame height for a total of three hours.
OPERATING
INSTRUCTIONS
Note: Operation instructions for GA9150A
Remote Ready ON/OFF Safety Valve/Pilot
Kit will be included with the kit.
1. STOP! Read the safety information, col-
umn one.
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 around log set and
near oor. If you smell gas, STOP! See
safety information, page 3. 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.
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901267-01E 13
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. 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. The pilot is attached to the rear of
the front burner. If needed, keep pressing
ignitor button until pilot lights.
Note: If pilot does not stay lit, contact a
qualied service person or gas supplier
for repairs. Until repairs are made, light
pilot with match.
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 quali-
ed service person.
9. To shut off burner only leaving pilot lit,
turn control knob clockwise to the
POLOT position.
OPERATION
Continued
Pilot
Thermocouple
Figure 19 - Thermocouple and Pilot
CLEANING AND MAINTENANCE
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.
Turn control knob clockwise to the
PILOT position.
TECHNICAL SERVICE
• Keep the area around the log set clean and
clear of debris.
• Occasionally, you may use a soft bristle
brush to clean logs.
• Once every year a qualied agency or certi-
ed chimney sweep should examine and
clean the venting system of the replace.
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.
fire-parts.com
www.desatech.com 901267-01E14
TROUBLESHOOTING
Note: All troubleshooting items are listed in order of operation.
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/
pressure
1. Passage of air/gas across
irregular surfaces
1. Incorrect gas supply or
pressure
2. Blocked burner orice 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 posi-
tioned wrong
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
ames contact the logs. This
is especially true with pro-
pane/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
(GA9050A-1 Only)
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 flue in very cold
weather
1. Relieve any tight bends or
kinks in gas supply line
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
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www.desatech.com
901267-01E 15
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
When ignitor button is pressed,
there is spark at pilot but no
ignition (GA9050A-1 Only)
Pilot lights but ame goes out
when control knob is released
(GA9050A-1 Only)
Burner does not light after pilot
is lit (GA9050A-1 Only)
Delayed ignition burner
(GA9050A-1 Only)
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 13)
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 13)
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. Reconnect leads
1. Adjust pilot ame for ap-
proximately 2" blue ame
2. Replace pilot orice set
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 in-
stalled
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. Thermocouple leads dis-
connected or improperly
connected
1. Pilot ame needs adjusting
2. Wrong pilot orice
fire-parts.com
www.desatech.com 901267-01E16
TROUBLESHOOTING
Continued
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
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)
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.
-
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.
fire-parts.com
www.desatech.com
901267-01E 17
REPLACEMENT PARTS
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
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
fire-parts.com
www.desatech.com 901267-01E18
PARTS
BURNER MODELS VVMR18, VVMR24, FVMR18 AND FVMR24
3
1
8
6
12
10 11
10
4
2
7
9
5
fire-parts.com
www.desatech.com
901267-01E 19
PARTS
BURNER MODELS
This list contains replaceable parts used in your log set. When ordering parts, follow the
instructions listed under Replacement Parts on page 17 of this manual.
KEY
NO. PART NO. DESCRIPTION QTY.
1 14325 Brass 3/8 FLR x 1/2 FPT Elbow • • 1
2 14528 Brass 3/8 FLR x 3/8 FPT Elbow • • 1
3 901066-01 Brass Air Mixer - Natural Gas • • 1
4 901064-10 Natural Gas Injector • 1
901064-03 Natural Gas Injector • 1
5 901763-02 Burner Manifold • 1
901763-01 Burner Manifold • 1
6 901767-02 Burner Pan • 1
901767-01 Burner Pan • 1
7 901242-01 Damper Clamp - Std. Assembly • • 1
8 901232-01 Gas Line - 12" Aluminum • • 1
9 901800-01 Log Grate • 1
901757-01 Log Grate • 1
10 901060-01 Burner Connection Fitting • • 2
11 901765-03 Right Side Burner • 1
901765-01 Right Side Burner • 1
12 901765-04 Left Side Burner • 1
901765-02 Left Side Burner • 1
PARTS AVAILABLE — NOT SHOWN
901156-01 0.4# Bag Embers • • 1
901155-01 1.00# Bag Ash Bed Material (Vermiculite) • • 1
VVMR18, FVMR18
VVMR24, FVMR24
fire-parts.com
www.desatech.com 901267-01E20
PARTS
KINGSTON SPLIT OAK LOG SET MODELS
This list contains replaceable parts used in your log set. When ordering parts, follow the
instructions listed under Replacement Parts on page 17 of this manual.
1
5
6
3
4
7
2
Kingston Split Oak Logs
KEY
NO. PART NO. DESCRIPTION QTY.
1 901123-01 Bottom Log VCB-13 •2
901123-02 Bottom Log VCB-14 •2
2 901122-01 Bottom Log VCB-11 •2
901122-02 Bottom Log VCB-12 •2
3 901119-01 Top Log VS-12 • • 1
4 901121-01 Top Log VCR-12 • 1
5 901120-01 Top Log VCR-11 • • 1
6 901101-01 Top Log CHR-13 • • 1
7 901118-01 Top Log VCR-9 • • 1
VMLR18
VMLR24
fire-parts.com
This manual suits for next models
7
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