Desa Vanguard VGL450N Quick start guide

Save this manual for future reference.
OWNER’S OPERATION AND INSTALLATION MANUAL
B-VENT DECORATIVE GAS FIREPLACE
®
®
VGL450N (NATURAL) AND VGL450P (PROPANE/LP)
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohibited by state
or local codes.
*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer.
FOR YOUR SAFETY
— Do not store or use gasoline or any other flam-
mable vapors or liquids in the vicinity of this or
any other appliance.
— Duetohightemperatures,theapplianceshould
belocatedoutoftrafficandawayfromfurniture
and draperies.
— Do not place clothing or other flammable mate-
rials on or near the appliance.
— NEVERleavechildrenunattendedwhenafireis
burning in the 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.
• Ifyou cannot reach yourgas supplier, call the
fire department.
SAVE THIS BOOK
Thisbookisvaluable.Inadditiontoinstructing
you on how to install and maintain your appli-
ance, 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.
WARNING:THEDECORATIVEGASAPPLI-
ANCESERIESISINTENDEDFORUSEWITH
NATURAL OR PROPANE GAS ONLY ! (DE-
PENDING ON THE TYPE OF GAS YOUR
PARTICULARMODELISAPPROVEDFOR).
DO NOT ATTEMPT TO BURN ANY SOLID
FUELS IN THESE APPLIANCES.
WARNING: Improper installation,
adjustment, alteration, service or
maintenance can cause injury or
property damage. Refer to this
manual.Forassistanceoradditional
information consult a qualified in-
staller, service agency, or the gas
supplier.
CHECK LOCAL CODES PRIOR TO INSTALLATION

2
105704
VENTED TYPE DECORATIVE APPLIANCE
VGL450 Series
®
29 1/2"
19"
4" DIA.
4 1/2"
36"
33"
12 3/4"
4 1/2"
24"
32"
33 5/8"
5/8"
3/4"
2" 2 7/8"
HEARTH
DIMENSIONS
23 3/4"
7 1/2"
25 3/8"
14"
10"
17"
24"
21 7/8"
2 1/2"
1" 1 1/4"
Note: All dimensions in this installation manual are in inches unless otherwise specified.
Figure 1 - Appliance Dimensions
Nailing
Flange
AGA and CGA Rating Labels
Located Behind Access Panel
Spacers
3 Sides
J
TH TP
TP
TH
IN
PILOTADJ
ON OFF
P
I
L
O
T
R
O
B
E
R
T
S
H
A
W
J
TH TP
TP
TH
IN
PILOTADJ
ON OFF
P
I
L
O
T
R
O
B
E
R
T
S
H
A
W
Figure 2 - Location of Pilot Assembly and Control Valve (Access Panel and Logs
Removed for Clarity)
Pilot Assembly
Control Valve

3
105704
OWNER’S MANUAL
ModelVGL450seriesisaradiantheatdeco-
rativegasappliance thatusesamillivoltgas
control valve and a pilot ignition system.
This appliance requires a 4" B-1 type vent-
ing system.
4" B-1 type vent NOT supplied by DESA.
Check with your "B" vent instructions for
installation guidelines.
This appliance, when installed, must be
electrically grounded in accordance with
localcodesor,intheabsence oflocalcodes,
with the National Electrical Code, ANSI/
NFPA 70 or the CSA C22.1 CANADIAN
ELECTRICAL CODE for Canada.
The installation must conform with local
codesor, in the absence of local codes, with
theNationalFuelGasCodeANSIZ223.1or
with the current CAN/CGA-B149[.1 OR .2]
Installation Codes for Canada.
This appliance complies with ANS Z21.50-
1998 andCAN/CGA 2.22-M98 Standard as
a VENTED DECORATIVE GAS APPLI-
ANCEand is tested and listed by the Ameri-
can Gas Association and Canadian Gas
Association.
INTRODUCTION
WARNING: This gas appli-
ance must not be connected to a
chimney flue servicing a solid
fuel burning appliance.
• ModelVGL450N uses NATURAL GAS
ONLY.
• Model VGL450P uses PROPANE GAS
ONLY.
If you have any doubts as to which gas your
particular unit is approved and tested for,
please check the AGA/CGA rating plate
located behind the access panel (Figure 1,
page 2).
BEFORE YOU BEGIN
Before beginning the installation of your
appliance, read these instructions through
completely.
ThisDESAapplianceanditsapprovedcom-
ponentsaresafewheninstalledaccordingto
this installation manual and are operated as
recommended by DESA. Unless you use
DESA approved components tested for this
appliance, YOU MAY CAUSE A FIRE
HAZARD!
The DESA warranty will be voided by, and
DESA disclaims any responsibility for the
following actions :
A) Modification of the appliance or any of
the components manufactured by
DESA unless otherwise permitted in
writing by DESA.
B) Use of any component part not ap-
proved by DESA in combination with
this DESA appliance.
C) Installation and/or operation in a man-
nerotherthan instructed in this manual.
D) The burning of anything other than the
type of gas approved for use in this gas
appliance.
CAUTION:Installationandre-
pair should be done by a quali-
fied service person. The appli-
ance should be inspected before
use, and at least annually by a
qualifiedserviceperson.Morefre-
quent cleaning may be required
duetoexcessivelintfromcarpet-
ing, bedding material, pet hair,
etc. It is imperative that the con-
trol compartments, burners and
circulating air passageways of
the appliance be kept clean.
NOTICE: This appliance is not
intended to be used as a primary
source of heat.
To determine the safest and most efficient
location for your appliance, you must take
intoconsiderationthefollowingguidelines:
1. The location must allow for proper
clearances (see Clearances, page 4 ).
2. Consider a location where heat output
wouldnot be affectedby drafts, aircon-
ditioning ducts, windows or doors.
3. A location that avoids the cutting of
joists or roof rafters will make installa-
tion easier. Figure 3 shows a plan view
of a few common locations.
SELECTING
LOCATION
Flush installations are recommended
where living space is limited or at a pre-
mium, and since the space required to en-
close the appliance would be located be-
yondanoutsidewall,thiswouldalsoreduce
the cutting of joists, roof rafters and such.
Check local codes for any restrictions.
Projected installations can extend any
distanceinto theroom. Aprojection maybe
ideal for a new addition on an existing,
finished wall.
Corner installations make use of space
thatmaynotnormallybeusedandprovides
a wider and more efficient range for radiant
heat transference.
Internalwallinstallationsprovideadis-
creet option for room separation and can
also be ideal as an addition to an existing
wall.
Also, in selecting a location, the following
precautions must be observed:
1. Do not connect this appliance to a
chimney system used for a solid fuel
burning fireplace.
2. Install in an area providing ventilation
and adequate combustion air.
3. Due to hightemperatures, the appliance
should be located out of traffic and
away from furniture and draperies.
4. NEVER obstruct the front opening of
the appliance or the flow of combus-
tion and ventilation air. Keep control
compartments accessible.
5. Do not locate in the vicinity where
gasoline or other flammable liquids
maybestored.The appliance area must
be kept clear and free from these com-
bustible materials.
Figure3-PossibleLocationsforInstalling
Appliance
INTERNAL WALL
INSTALLATION
CORNER
INSTALLATION
FULL
PROJECTION
INSTALLATION
FLUSH
INSTALLATION

4
105704
VENTED TYPE DECORATIVE APPLIANCE
VGL450 Series
®
CLEARANCES
Minimum clearances to combustibles are:
• Back and sides
of outer surround:.....................0" min.
• Drywall to sides
of front face:.............................0" min.
• "B" Vent surfaces: ....................1" min.
• Ceiling to opening:.................30" min.
• Floor: ........................................0" min.
• Adjacent side wall:..................18" min
Figure4-MinimumClearances(TopView)
Figure 5 - Minimum Clearances (Front
View)
CAUTION : Do not block re-
quired air spaces with insulation
or any other material.
Do not obstruct effective open-
ing of appliance with any type of
facing material.
MANTEL CLEARANCES
Woodwork, such as wood trims, mantels,
andothercombustiblematerial,must notbe
placed within 7 inches of the appliance's
opening. Combustible material projecting
more than 1 1/2inches from the appliance's
front face must not be placed less than 12
inches from the opening of the appliance
(ref. NFPA Standard 211 Section 7-3.3.3.).
Figures 6 and 7 show limits on mantel
locations.
Figure 6 - Mantel Clearances - Side View
(Cross Section)
Figure 7 - Mantel Clearances - Top View
(Cross Section)
FRAMING
Typical framing is shown in Figures 8
through 10, depending on your particular
installation.
If the appliance is to be installed directly on
carpeting, tile (other than ceramic), or any
combustiblematerialotherthanwoodfloor-
ing, the appliance must be installed upon a
metalorwoodpanelextendingthefullwidth
and depth of the appliance.
If a raised platform is to be constructed,
ceiling clearance must be maintained (see
Clearances).
Figure8-RoughOpeningforInstallingin
Wall
Figure 9 - Rough Opening for Installing
on Raised Platform
Figure 10 - Rough Opening for Corner
Installation
23 5/8"
MINIMUM
33 3/8"
MINIMUM TO
FRAMING
10 3/8"
MIN.
DRYWALL
36 1/4"
0" Clearance
Nail to Stud
or Header Front
Face Drywall
14" MIN.
36 1/4"
MIN.
33 1/4"
MIN.
*
14" MIN.
36 1/4"
MIN.
33 1/4"
MIN.
Platform Must Be Solid, Flat, and Fully
Supported
*As Required By Design, As Long As
Ceiling Clearance Is Maintained
33°6" Nom.
Within
12" 7" Min.
3" Nom.
1 1/2"
Max.
30" Minimum
Clearance
From Top Of
Opening To
Ceiling
0" Clearance
To Top Of Spacer
0" Clearance
To Floor
1" Min. Clearance To
“B” Vents Outer Pipe
PRE-INSTALLATION
PREPARATION
1 1/2"
MAX.
3"
NOM. 6" MIN.
WITHIN 12"
18" MIN. TO
ADJACENT WALL
33°
Combustible
Material
Drywall
Header
Combustible
Material May
Be Used

5
105704
OWNER’S MANUAL
Proceed to secure appliance to prepared
framing at nailing flanges located at the
sidesoftheapplianceasshowninFigure11.
Figure 11 - Attaching Fireplace to Wall
Studs
VENTING
INSTALLATION
A 4" B-1 Type Gas Vent Pipe is a double
wall,unitizedventingsystem(notsupplied)
which must be installed during the rough
framingoftheappliance.AnyB-1Typegas
ventsystemmaybeusedforproperventing
aslongasitisinstalledperthemanufacturer's
recommendations.
This appliance has been supplied with a 4"
dia. starting collar for a snug fit. Slide B-1
ventpipeoverstarterpipeuntilfullyseated.
Fasten this first section of "B" vent pipe by
running a 3/4" long sheet metal screw
through outer wall of pipe until secure. (see
Figure 12).
Figure 12 - Securing “B” Vent to Starter
Collar
The B-1 vent pipe must be properly termi-
nated per manufacturer's instructions.
Check with your B-1 Vent installation in-
structions regarding multiple venting into a
common flue.
IMPORTANT: Vent pipe MUST NOT ter-
minate in an attic space.
Minimumheight for complete system(vent
termination and appliance) is 12 feet.
Maximum horizontal run of B-1 type vent
pipe can be no greater than 75% of total
vertical height of the vent.
PRE-INSTALLATION
PREPARATION
Continued
Secure B-Vent
to Starter
Collar Using
3/4" Long
Sheet Metal
Screw
Double Wall B-1
Type Vent
(Not Supplied)
Nailing
Flanges
Framing
Nails

6
105704
VENTED TYPE DECORATIVE APPLIANCE
VGL450 Series
®
WALL SWITCH
INSTALLATION
The installation of a wall switch in this
appliance allows you to activate the gas
control valve without the use of normal
current.
CAUTION: Do not wire this
millivolt system wall switch to a
regular power supply.
1. Remove access panel from lower front
face.
2. Connect the millivolt wires from ter-
minals TH and TH/TP to wall switch
as shown in Figure 13 (both are sup-
plied).
Figure 13 - Wall Switch Wiring Diagram
Note: Ifanyoftheoriginalwireassuppliedmustbereplaced,use18AWGTYPECL2(UL)
105 C (25 ft. length MAXIMUM) or equivalent.
OPTIONAL WIRELESS HAND-
HELD REMOTE CONTROL
(GHRC) INSTALLATION
Note: If using optional wireless hand-held
remote control, the wall switch is no longer
operational.
Installing Receiver
1. Remove access panel from lower front
face of firebox. Lift straight up on ac-
cess panel until it stops. Pull bottom of
access panel forward, then down.
2. Disconnect wall switch wires from TH
and TH/TP terminals on control valve
(see Figure 13).
3. Install remote receiver unit onto mount-
ingbracketusingthe two plasticmount-
ing clips (see Figure 14).
4. Connect wires to control valve. Con-
nect white wire to terminal TH. Con-
nect red wire to terminal TH/TP.
5. Locate the battery clip mounted on the
back of the receiver (see Figure 15).
6. Slide 9-volt battery (not included)
through the clip. Note: Only use alka-
line battery.
7. Attach the terminal wires to the battery
(see Figure 15).
8. Replace access panel. Place top of ac-
cess panel into opening and slide up.
Push bottom of access panel in and
slide down to install.
Figure 14 - Installing Remote Receiver
(Shown from Rear of Mounting Bracket)
Figure 15 - Installing Battery in Receiver
Battery
Clip
9-Volt Battery
Receiver
Terminal
Wires
Receiver
Mounting
Bracket
Plastic
Mounting
Clips
INSTALLATION
N.O. WALL SWITCH
(SUPPLIED)
DO NOT
CONNECT
TO 120V
USE ONLY CL2 THERMOSTAT WIRE
18 GA. RED/WHITE (PROVIDED)
OR EQUIVALENT
(HEAT LIMIT
SWITCH)
TH
TP
TH/TP
CONTROL VALVE
Pilot
Gas Line
to Burner
Incoming
Main
Gas
Supply
Pilot Gas
Line
Thermopile VGL450 SERIES MILLIVOLT
WIRING DIAGRAM

7
105704
OWNER’S MANUAL
GAS SUPPLY TESTING
Note: Thissectionisintendedasaguidefor
qualified technicians installing gas to this
appliance.
Do not connect appliance before pressure
testinggaspiping.Damagetogasvalvemay
resultandanunsafeconditionmaybecaused.
IMPORTANT: The appliance and its indi-
vidual shut-off 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).
The Gas Control Valve is secured to the
burner pan assembly underneath the front
ledge.
GAS RATINGS
TYPE OF GAS: NATURAL PROPANE/LP
MAX. INPUT
RATING (Btu/hr): 12,000 12,000
MANIFOLD
PRESSURE: 3.5 in. W.C. 10.0 in. W.C.
* MIN. SUPPLY
PRESSURE: 4.5 in. W.C. 7.0 in. W.C.
MAX. SUPPLY
PRESSURE: 10.5 in. W.C. 13.0 in. W.C.
*For the purpose of input adjustment
Figure17-1/8"PluggedTappingLocation
INSTALLATION
Continued
Installing 9-Volt Battery in Hand-
Held Remote Control Unit
1. Remove battery cover on back of re-
mote control unit.
2. Attach terminal wires to the battery
(not included). Place battery into the
battery housing. Note: Only use alka-
line battery.
3. Replace battery coveronto remote con-
trol unit.
Figure 16 - Installing Battery in Hand-
Held Remote Control Unit
Battery
Cover
9-Volt
Battery
Terminal
Wires
Remote
Control Unit
Battery
Housing
TH TP TH
TP
R
O
B
E
R
T
S
H
A
W
IN
P
I
L
O
T
ON OFF
PILOT ADJ
Gas Shut
Off Valve
Red Surface Indicates
For Propane Use Only
Air Shutter
Flexible
Gas Line
DO NOT
KINK
Coupling
Pilot
Adjustment
Cap
1/8" NPT
Plugged
Tapping
A 1/8" NPT plugged tapping is provided on
the Gas Control Valve for a test gauge
connection immediately upstream of the
gas supply connection to the appliance (see
Figure 17).
Continued

8
105704
VENTED TYPE DECORATIVE APPLIANCE
VGL450 Series
®
Figure 20 - Gas Connection
Before connecting the flexible gas line to
the gas control valve, a sediment trap must
be included between them. It must extend
down3 inchesbeyondthe centerofthe pipe
(See Figure 20).
Prepare incoming approved gas line with
teflon tape or pipe joint compound (Check
with local building codes).
WARNING: All gas piping
andconnectionsmustbetested
for leaks after the installation is
completed.
After ensuring that the gas valve
is on, apply a soap and water
solution to all connections and
joints. If bubbles appear, leaks
can be detected and corrected.
Donotuseanopenflameforleak
testing and do not operate any
appliance if a leak is detected.
Complete your gas installation by connect-
ingincoming gas line with flexible gasline.
Secure tightly with wrench but do not over-
tighten. Replace burner pan.
CAUTION: Compounds used
on threaded joints of gas piping
shall be resistant to the action of
Liquefied Petroleum (LP or pro-
pane), and should be applied
lightly to ensure excess sealant
does not enter the gas line.
GAS LINE HOOK-UP
A manual shut-off valve must be included
within (6') six feet of the appliance’s gas
supply system. For your convenience, it
maybedesirabletoinstalltheshut-offvalve
outside the appliance's enclosure where it
canbeaccessedwitha keythroughawallas
shown in Figure 18.
Route an approved gas line towards the
appliancecominginfromanydirection(see
Figure 19).
A flexible gas line long enough to connect
theincomingapproved gaslinewiththegas
control valve will be required, along with a
sediment trap.
Theapproximate location ofthegas control
valve inlet is indicated in Figure 19.
Note: Do NOT kink flexible gas line.
Figure 18 - Manual Shut-Off Valve
Installation
Figure 19 - Routing Incoming Gas Line
NOTICE:Gaslinehookupshould
bedonebyyourgassupplierora
qualified service person.
WARNING: Before you pro-
ceed,makesureyourgassupply
is OFF.
4"
6"
Note: Incoming
Gas Line can
be Routed into
Appliance from
any Direction
Approximate
Gas Valve
Inlet Location
INSTALLATION
Continued

9
105704
OWNER’S MANUAL
OPERATING
FIREPLACE
FOR YOUR SAFETY
READ BEFORE
LIGHTING
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
A. Thisappliancehas a pilotwhichmust
belighted byhand.Whenlighting the
pilot,followtheseinstructionsexactly.
B. BEFORE LIGHTING smell all
aroundtheapplianceareaforgas.Be
suretosmellnexttothefloorbecause
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.
• Donottouchanyelectricswitch;do
notuseanyphoneinyourbuilding.
• Immediatelycall yourgas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
C. Useonlyyour hand to pushinorturn
thegascontrolknob. Never use tools.
If the knob will not push in or turn
by hand, don’t try to repair it, call a
qualified service technician or gas
supplier. Force or attempted repair
may result in a fire or explosion.
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 un-
der water.
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information,
above.
2. Turnwallswitch to theOFFposition.
3. Turn off all electric power to the ap-
pliance.
4. Remove control access panel.
5. Turn gas control knob clockwise
Clockwise
to the OFF position.
6. Wait five (5) minutes to clear out any
gas.Ifyousmellgas,STOP!Follow“B”
in the safety information. If you don’t
smell gas, go to the next step.
7. Find pilot. Follow metal tube from
gas control. The pilot is behind the
burner tube.
8. Turn control knob counterclockwise
C-clockwise
to the PILOT position.
9. Pushintheknoballtheway and hold
in. Immediately light the pilot by
pressingthe redignitor button.Con-
tinue to hold the control knob in for
about (1) minute after the pilot is lit.
Release button and it will pop back
up. Pilot should remain lit. If it goes
out, repeat steps 5 through 9.
• If button does not pop up when
released, stop and immediately
call your service technician or gas
supplier.
• Ifthe pilot willnotstaylitafter sev-
eraltries,turnthe gascontrolknob
to “OFF” and call your service
technician or gas supplier.
10. Turngas control knob counterclock-
wise
C-clockwise
to “ON”. Knob can be
turned to “ON” only if the control
knob is popped out.
11. Replace control access panel.
12. Turn on all electric power to the ap-
pliance.
Figure 22 - Installing Log No. 2
NOTICE: Do not put lava rock on
burner or under burner. Placing
lava rock on burner could cause
performance problems.
INSTALLATION
Continued
2. Place log #2 (large front log) in
groove on firebox floor in front of
burner with log texture facing up and
out (see Figure 22).
3. Place lava rock along sides and front
of inside of firebox bottom. It is not
necessary to use all of the lava rock
provided.
Figure 23 - Control Knob in the PILOT
position
J
TH TP
TP
TH
IN
PILOTADJ
ON OFF
P
I
L
O
T
R
O
B
E
R
T
S
H
A
W
Position Indicator
Gas Control Knob
Continued

10
105704
VENTED TYPE DECORATIVE APPLIANCE
VGL450 Series
®
OPERATING
GUIDELINES AND
MAINTENANCE
INSTRUCTIONS
Do not use this appliance if any part has
been under water. Immediately call a quali-
fied service technician to inspect the appli-
ance and to replace any part of the control
system and any gas control which has been
under water.
Whenlitforthefirsttime,theappliancewill
emit a slight odor for about an hour or two.
This is a normal occurrence which is due to
the "curing" of logs and "burn-in" of inter-
nal paints and lubricants used in the manu-
facturing process.
Incleaning,takecarenottoalterthesettings
on the pilot assembly.
WARNING: The logs can be
hot. Handle only when cool.
WARNING: Have a qualified
agency periodically inspect the
vent system at the start of each
heatingseasonsoastobefreeof
any obstructions which may
hinder normal operation. Never
obstruct the flow of combustion
andventilationair;keepthefront
of the appliance clear of all ob-
stacles and combustible materi-
alssuchasgasolineorotherflam-
mablevaporsor liquids. Itis also
imperative that the control com-
partments, burners and circulat-
ingair passageways oftheappli-
ance be kept clean.
CAUTION: Keep control com-
partment, logs, burners, and area
surrounding the logs clean by
vacuuming or brushing at least
twice a year. Temporary removal
of the log set may ease the clean-
ingof the burnerandpilotassem-
bly (see Installing Logs and Lava
Rock , pages 8 and 9).
TO TURN OFF GAS
TO APPLIANCE
1. Turn off the wall switch.
2. Turn off all electric power to the ap-
pliance if service is to be performed.
3. Remove control access panel.
4. Turn gas control clockwise
Clockwise
to “OFF”. Do not force.
5. Replace control access panel.
Figure 24 - Pilot
OPTIONAL REMOTE
OPERATION
Note: The GHRC receiver and hand-
heldremotecontrolkitmustbepurchased
separately(seeAccessories&Replacement
Parts,page14).Followinstallationinstruc-
tions on pages 6 and 7 of this manual.
1. Afterlighting,let pilot flame burnfor
aboutoneminute.Turncontrolknob
to ON position.Adjust flame adjust-
ment knob anywhere between HI
and LO. Slide the selector switch to
the REMOTE position. NOTE: The
burner maylightifhand-heldremote
ON button was on when selector
switch was last turned off. You can
now turn the burner on and off with
the hand-held remote control unit.
IMPORTANT: Do not leave the se-
lector switch in the REMOTE posi-
tionwhenthepilotis not lit.This will
drain the battery.
IMPORTANT: Be sure to press the
ON/OFF buttons on the hand-held
remote control unit for up to 3 sec-
onds to assure proper operation.
2. Pressthe ON/OFF buttontoturnthe
burner on and off. When turning
burner off, the pilot will remain lit.
IMPORTANT: To turn the pilot off,
manually turn the control knob on
the heater to the OFF position.
PILOT ASSEMBLY
ADJUSTMENT
The pilot assembly is factory preset for the
proper flame height. Alterations to these
settingsmayhave occurredduringshipping
andhandling, if this is the case, some minor
readjustments may be necessary.
Thepilotassemblyislocatedbehindtheburner
tube on the right hand side. The thermopile
height should be at a distance of 3/8" to 1/2"
from the pilot flame (see Figure 25).
BURNER FLAME
ADJUSTMENT
Figure 25 - Correct Pilot Flame Pattern
The Air Shutter, located at the base of the
Main Burner Tube has been factory preset
tothe proper air to gas ratio which resultsin
a long, blue flame (see Figure 26).
Ifreadjustmentisnecessary,youcanrestore
proper flame setting by loosening the air
shutter screw and rotating the air shutter
until proper flame setting is achieved.
Tighten screw back (see Figure 17, page 7,
for air shutter location).
ClosingtheAirShutterreducestheairtogas
mix resulting in a longer, yellow flame
which could cause sooting.
Figure 26 - Burner Flame Patterns
CORRECT
INCORRECT
CLOSE
SHUTTER
INCORRECT
OPEN
SHUTTER
Short, Sharp,
Blowing Flame
Long, Blue Flame
Long, Uneven,
Yellow Flame
OPERATING
FIREPLACE
Continued
3/8" To 1/2"
Thermopile
Pilot
Burner
Thermopile
Pilot Burner

11
105704
OWNER’S MANUAL
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting.
If so, contact DESA International’s Tech-
nical Service Department at 1-800-323-
5190.
You can also visit DESA International’s
Technical Services web site at
www.desatech.com.
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• fireplace will not produce specified heat
• propane/LP gas supply may be low
When Gas Quality Is Bad
• pilot will not stay lit
• burner will produce flames and soot
• fireplace will backfire when lit
You may feel your gas pressure is too low
or gas quality is bad. If so, contact your
local propane/LP gas supplier.
WIRING DIAGRAM
WARNING: Turn off gas and
remotewallswitchbeforeservic-
ing appliance. Any safety screen
or guard removed for servicing
this appliance must be replaced
prior to operating.
Periodically inspect the vent system con-
nections both inside and outside the appli-
ance. Be sure that there are no obstructions
which may hinder the appliance's normal
operation.Iftheconnectiondoesnotappear
to be correct, contact your local service
technician.
WARNING: CHILDREN AND
ADULTS SHOULD BE ALERTED
TOTHEHAZARDSOFHIGHSUR-
FACE TEMPERATURES AND TO
STAY AWAY FROM THESE TO
AVOID BURNS OR CLOTHING
IGNITION.
YOUNG CHILDREN SHOULD BE
CAREFULLY SUPERVISED
WHEN THEY ARE IN THE SAME
ROOM AS THE APPLIANCE.
N.O. WALL SWITCH
(SUPPLIED)
DO NOT
CONNECT
TO 120V
USE ONLY CL2 THERMOSTAT WIRE
18 GA. RED/WHITE (PROVIDED)
OR EQUIVALENT
(HEAT LIMIT
SWITCH)
TH
TP
TH/TP
CONTROL VALVE
Pilot
Gas Line
to Burner
Incoming
Main
Gas
Supply
Pilot Gas
Line
Thermopile VGL450 SERIES MILLIVOLT
WIRING DIAGRAM
Note: Use only original replacement parts.
Thiswillprotectyourwarrantycoveragefor
parts replaced under warranty.
PARTS UNDER WARRANTY
Contactauthorizeddealersofthisproduct.If
theycan’tsupplyoriginalreplacementpart(s)
call DESA International’s Technical Ser-
vice Department at 1-800-323-5190 for re-
ferral information.
When calling DESA International, have
ready
• your name
• your address
• model and serial numbers of your fire-
place
• how fireplace was malfunctioning
• type of gas used (propane/LP or natural
gas)
• purchase date
Usually,we will ask you to return the defec-
tive part to the factory.
PARTS NOT UNDER
WARRANTY
Contactauthorizeddealersofthisproduct.If
theycan’tsupplyoriginalreplacementpart(s)
callDESAInternational’sPartsDepartment
at 1-800-972-7879 for referral information.
When calling DESA International, have
ready
• model number of your fireplace
• the replacement part number
REPLACEMENT
PARTS

12
105704
VENTED TYPE DECORATIVE APPLIANCE
VGL450 Series
®
TROUBLESHOOTING The two most common causes of a malfunctioning gas appliance are:
1. Loose wiring connections
2. Construction debris clogging the pilot and/or gas control valve filter
OBSERVED PROBLEM
Cannot light pilot
Pilot will not stay lit
No gas to burner, although wall switch and
valve are set to the ON position
Frequent pilot outage
Pilot goes out when wall switch is ON
POSSIBLE CAUSE
1. No gas supply, or shut-off valve is OFF
2. Air in gas line
3. Construction debrisclogging pilotorifice
4. Low gas pressure
5. Control valve knob is not on the PILOT
position
6. Kinked pilot line
7. Bad valve
1. Loose wiring on thermopile to regula-
tor valve. No millivolt current is being
sent back to regulator
2. If valve knob and wall switch are in the
ON position, probable defective regula-
tor valve
1. Wall switch wires defective or too long
2. Pilot not generating sufficient
millivoltage
1. Pilot flame may be too low, causing
safety pilot to “drop out”
1. Millivolt output on thermopile too high
REMEDY
1. Check to see if you have gas supply
2. Hold regulatorcontrolvalveinthePILOT
position for 3 to 4 minutes to purge air
3. Remove debris and dirt, inspect and
clean any other possible obstructions
4. Contact your gas supplier
5. Refer to section on pilot lighting
6. Have a qualified technician replace pi-
lot line
7. Replace regulatorvalve (see Accessories
& Replacement Parts, page 14)
1. Check wiring connections. Refer to wir-
ing diagram shown in Wall Switch In-
stallation, page 6
2. Havea qualifiedtechnician replace valve
1. Check electrical connections
2. See Pilot will not stay lit, above
1. Clean andadjustpilotflamefor maximum
flame impingement on pilot generator
1. Replace thermopile
Note: For additional help, visit DESA
International’s Technical Service web
site at www.desatech.com.
www.desatech.com
Note: Before troubleshooting the system,
make sure the gas shut-off valve is ON.

13
105704
OWNER’S MANUAL
TROUBLESHOOTING
Continued
WARNING: 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.
• Immediatelycallyourgassupplierfromaneighbor’sphone.Followthe
gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
IMPORTANT: Operatingfireplacewhereimpuritiesinairexistmaycreateodors.Cleaning
supplies, 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.
POSSIBLE CAUSE
1. Metal expanding while heating or con-
tracting while cooling
1. Fireplace burning vapors from paint, hair
spray, glues, etc. (See IMPORTANT
statement above)
2. Low fuel supply
3. Gas leak. SeeWarning statement at
top of page
1. Gas leak. SeeWarning statement at
top of page
2. Control valve defective
1. Foreign matter between control valve
and burner
2. Gas leak. SeeWarning statement at
top of page
1. Improper log placement
2. Air holes at burner inlet blocked
3. Burner flame holes blocked
OBSERVED PROBLEM
Fireplace produces a clicking/ticking noise
just after burner is lit or shut off
Fireplace produces unwanted odors
Gas odor even when control knob is in OFF
position
Gas odor during combustion
Dark residue on logs or inside of fireplace
REMEDY
1. This is common with most fireplaces. If
noise is excessive, contact qualified ser-
vice person
1. Ventilate room. Stop using odor caus-
ing products while fireplace is running
2. Refill supply tank
3. Locate and correct all leaks (see Gas
Line Hook-Up, page 8)
1. Locate and correct all leaks (see Gas
Line Hook-Up, page 8)
2. Replace control valve
1. Take apart gas tubing and remove for-
eign matter
2. Locate and correct all leaks (see Gas
Line Hook-Up, page 8)
1. Properly locate logs
2. Clean out air holes at burner inlets. Pe-
riodically repeat as needed
3. Remove blockage or replace burner
www.desatech.com

14
105704
VENTED TYPE DECORATIVE APPLIANCE
VGL450 Series
®
ACCESSORIES AND
REPLACEMENT
PARTS
RECEIVER AND HAND-HELD
REMOTE CONTROL KIT
GHRC SERIES
For all models. Allows the gas log heater to
be turned on and off by using a hand-held
remote control.
HEAT LIMIT SWITCH
14116 (105739-01)
Shouldthelimitswitchneedreplacing,have
a qualified technician replace it (see Wiring
Diagram, page 11). The limit switch is
locatedunder the top door track on the right
hand side.
LOG SET - 25916 (105738-01)
Front and rear logs come standard with all
units. Check with local representative for
options.
"B-1 TYPE" VENT PIPE
(Not Shown)
Any B-1 type, 4" dia., gas vent pipe may be
purchased from your local distributor or
local hardware store.
PILOT ASSEMBLY
Natural - 20382 (105740-01)
LP - 27085 (105740-02)
If in need of replacing, have a qualified
technician replace it.
GAS CONTROL VALVE
Natural - 14201 (105741-01)
LP - 27086 (105741-02)
If in need of replacing, have a qualified
technician replace it.
WALL SWITCH
22180 (105742-01)
Wallswitch,coverplate,andmillivoltwires
are supplied with the appliance. If wires
need replacing, use proper gauge.
Rear Log
Front Log
Pilot Assy.
Thermopile
Assy.
Pilot Gas
Line
BI-FOLD GLASS DOORS
Brushed Brass - VDGL450
Polished Brass - VDPL450
For all models. Bi-fold glass doors with
extruded aluminum brushed or polished
brass finish.
Colored Cap
Indicates for
Propane Use
Only
Millivolt
Wires
Wall Switch
and Cover
Plate

15
105704
OWNER’S MANUAL
NOTES
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LIMITED WARRANTY
B-VENT FIREPLACE
DESAInternationalwarrantsthisproducttobefreefromdefectsinmaterialsandcomponentsforfour(4)yearsfromthedateoffirstpurchase,
providedthattheproducthasbeenproperlyinstalled,operatedandmaintainedinaccordancewithallapplicableinstructions.Tomakeaclaim
under this warranty the Bill of Sale or cancelled check must be presented.
Thiswarrantyisextendedonlytotheoriginalretailpurchaser.Thiswarrantycoversthecostofpart(s)requiredtorestorethisheatertoproper
operating condition and an allowance for labor when provided by a DESA Authorized Service Center. Warranty part(s) MUST be obtained
through authorized dealers of this product and/or DESA International who will provide original factory replacement parts. Failure to use
originalfactoryreplacementpartsvoidsthiswarranty.TheheaterMUSTbeinstalledbyaqualifiedinstallerinaccordancewithalllocalcodes
and instructions furnished with the unit.
Thiswarrantydoesnotapplyto parts that are not in original condition because of normalwearandtear,orpartsthat fail or become damaged
as a result of misuse, accidents, lack of proper maintenance or defects caused by improper installation. Travel, diagnostic cost, labor,
transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner.
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT;
THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION
OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE TO FOUR (4) YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA
INTERNATIONAL’S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA INTERNA-
TIONAL SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential
damages, so the above limitation on implied warranties, or exclusion or limitation on damages may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.
For information about this warranty write:
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
INTERNATIONAL
KEEP THIS WARRANTY
WARRANTY INFORMATION
Model
Serial No.
Date Purchased
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written
warranty. We make no other warranty, expressed or implied.
105704-01
55739
Rev. A
04/99
NOT A UPC
105704 01