care and operation
instructions
DIRECT VENT
SLDVT-35/40 SERIES
WarninGs
direct-Vent Gas FirepLace Heaters
p/n 506010-01 reV. n/c 08/2008
• Hot! do not touch! the glass and
surfaces of this appliance will be hot
during operation and will retain heat
forawhileaftershuttingofftheappli-
ance. severe burns may result.
• carefully supervise children in the
same room as appliance.
MODELS
Millivolt Models
Electronic Models
sLdVt-35ne
sLdVt-40ne
sLdVt-35nM
sLdVt-35pM
sLdVt-40nM
sLdVt-40pM
• if small children are present in the home, it is
recommended that this appliance be fitted with
a screen door or screen panel kit. see Pages
13 & 14 for ordering information.
instaLLer: Leave this manual with the appliance.
consuMer: retain this manual for future reference.
WarninG:iFtHeinForMationintHisManuaL
is not FoLLoWed eXactLY, a Fire or eXpLo-
sionMaYresuLtcausinGpropertYdaMaGe,
personaL inJurY or Loss oF LiFe.
aVertisseMent: assureZ-Vous de Bien
suiVreLesinstructionsdonnÉdanscette
noticepourrÉduireauMiniMuMLerisQue
d'incendie ou pour ÉViter tout doMMaGe
MatÉrieL, toute BLessure ou La Mort.
do not store or use gasoline or other flammable
vapors or liquids in the vicinity of this or any
other appliance.
pour Votre sÉcuritÉ: ne pas entreposer ni
utiliser d'essence ni d'autre vapeurs ou liquides
inflammables dans le voisinage de cet appareil ou
de tout autre appareil.
WHat to do iF You sMeLL Gas:
• do not 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 your gas supplier's
instructions.
pour Votre sÉcuritÉ: Que faire si vous sentez
une odeur de gaz:
• ne pas tenter d'allumer d'appareil.
• ne touchez à aucun interrupteur. ne pas vous
servir des téléphones se trouvant dans le bati-
ment où vous vous trouvez.
• evacuez la piéce, le bâtiment ou la zone.
• appelez immédiatement votre fournisseur de
gaz depuis un voisin. suivez les instructions
du fournisseur.
• if your gas supplier cannot be reached, call
the fire department.
installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
Portland
• si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le service dos incendies.
otL report no. 116-F-50-5
US
L'installation et service doit être exécuté par un
qualifiéinstalleur, agencedeserviceoulefournis-
seur de gaz.
A French manual is available upon request. Order P/N 506010-01CF
Ce manuel d’installation est disponible en francais, simplement en
faire la demande. Numéro de la pièce 506010-01CF
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orifice sizes - sea Level to High altitude
(all Models): These appliances are tested and
approvedforinstallationsatelevationsof0-4500
feet (0-1372 meters) above sea level using the
standard burner orifice sizes (marked with an
"*" in Table 7).
removing control compartment door:
Open the panel by gently lifting it upward and
forwards. Slide the door, first to one side and
then the other, so the tabs clear both of the
locating holes.
Manifold Gas supply pressure
(millivolt models)
Fuel #
Low
High
natural (Lo) 2.2" Wc
(Hi) 3.5" Wc
(0.87 kpa)
Gas
(0.55 kpa)
On millivolt systems, the piezo igniter, HI/LO
flame adjustment knob, and pilot and main
gas OFF/ON control knob are located below
the glass panel enclosure. The gas valve for
electronic systems is also located below the
glass enclosure panel. See Figure 1.
(Lo) 6.3" Wc (Hi) 10.0" Wc
(1.57 kpa) (2.49 kpa)
Atthetimeofinstallation,itmustbedetermined
if the appliance needs to be derated. Contact
yourlocalgassupplierforderationrequirements
for your area.
propane
Table 4
Manifold Gas supply pressure
deration - At higher elevations, the amount of
BTU fuel value delivered must be reduced by
eitherusinggasthathasbeenderatedbythegas
company or by changing the burner orifice to a
smallersizeasregulatedbythelocalauthorities
having jurisdiction and by the (USA) National
Fuel Gas Code NFPA 54/ANSI Z223.1 - latest
edition or, in Canada, the CAN1-B149.1 and .2
codes - latest edition.
(electronic models)
reinstalling control compartment door:
To reinstall, insert the tabs on each side of the
doorintothecorrespondingholesinthecontrol
compartment opening, one side first then the
other. To close, pull the door gently up and
close by pushing forward and pushing the top
edge down into the groves at the brackets until
it locks in place.
Fuel #
Low
High
natural (Lo) 2.2" Wc
(Hi) 3.5" Wc
(0.87 kpa)
Gas
(0.55 kpa)
(Lo) 6.3" Wc (Hi) 10.0" Wc
(1.57 kpa) (2.49 kpa)
propane
Table 5
Burn-in period
Burner orifice sizes
elevation 0-4500 feet ( 0-1372 meters)
During the first few fires of this appliance there
will be some odor due to the curing of the
paint and burning off of lubricants used in the
manufacturing process.
Model
nat.Gas
propane
series
drill size (inches)
drill size (inches)
#49 (0.0730")
21L82 •
0.045"
75L10 •
*
*
*
sLdVt-35
Depending on your use, the burn-in period may
take a few hours or a few days.
#44 (0.0860")
60J80 •
0.048"
99K78 •
*
sLdVt-40
* Standard size installed at factory
• Part /Cat. Number
Keep Your House WeLL VentiLated
durinG tHe curinG process. tHe odor
and HaZe eMitted durinG tHe curinG
process can Be Quite noticeaBLe and
MaY set oFF a sMoKe detector.
Table 6
Test gauge connections are provided on the
front of the millivolt gas control valve, identi-
fied IN for the inlet and OUT for the manifold
side (see Figure 3 on Page 4). A 1/8" NPT Test
gauge connection is provided at the inlet and
outlet (manifold) ports on the electronic gas
control valve (see Figure 4 on Page 4).
control compartment door tab
Figure 1
If an optional blower is installed, Do Not turn
it on during the Burn-In period.
operation and care oF Your
appLiance
A white film may develop on the glass front
during the first few fires as part of the curing
process. The glass should be kept clean during
thefirsttwoweeksofusetopreventthefilmfrom
baking on (making it very difficult to remove).
See Cleaning Glass on Page 5.
These appliances must be isolated from the
gas supply piping system (by closing their
individual manual shut-off valve) during any
pressure testing of the gas supply piping
systemattestpressuresequaltoorlessthan
1/2 psig (3.5 kPa).
The standard controls for appliance opera-
tion are located behind the panel below the
appliance front glass enclosure panel (see
Figure 1). Optional control switches are also
available (see Page 13 - Remote Wall Switch,
Remote Control or Wall Thermostat).
Gas controls/control compartment
access
These appliances and their individual shut-off
valves must be disconnected from the gas
supply piping system during any pressure
testing of that system at pressures greater
than 1/2 psig (3.5 kPa).
Operation of millivolt and electronic gas con-
trol systems are different. Before lighting and
operatingyourappliancedetermineifyouhave
a millivolt or electronic appliance. Familiarize
yourself with the gas control valve that your
appliance uses. Refer to Figure 1 for access
to the gas control valve.
Thegascontrolscanbefoundbehindthecontrol
compartment access door.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
3
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Millivolt appliances - Appliances with
Millivolt systems will be fitted with the gas
control valve shown in Figure 3.
electronic appliances - Appliances with
electronic systems will be fitted with the
electronic valve shown in Figure 4.
Millivolt appliances - To light millivolt ap-
pliances refer to Figure 2. Detailed lighting
instructions are found on Pages 18 & 19 . Mil-
livoltappliancelightinginstructionsmayalso
be found on the pull out lighting instruction
labels attached to the gas control valve.
Once the pilot is lit, the main burner may be
turned ON and OFF using wall switch, remote
control, optional on unit rocker switch (FRS),
or wall thermostat. To operate: Toggle the
switch between its ON and OFF positions.
5 Inch
Pipe Nipple
Gas Flex Line
Spring Door Latch
Valve
Piezo
Figure 2
If your millivolt appliance is equipped with an
optional remote switch kit (wall switch, remote
control, rocker switch, or wall thermostat) and
thepilotislit, theappliancemainburnermaybe
turned on and off using the optional switch.
Main Gas Control Knob
Gas Inlet
O
L
I
P
N
W O
P
F
Note: Topreventexcessiveresistanceinburner
circuit(whichcancauseburneroperationprob-
lems), only one burner control switch should
be wired to valve.
I
Gas
IN OUT
Outlet
Manifold Pressure
Port
electronic appliances -
Inlet
Variable Flame
Pressure
Port
Height Adjustment
Terminals TPTH, TP & TH
Tolightelectronicappliancesrefertothedetailed
lighting instructions found on Pages 20 & 21
of these instructions. Electronic appliance
lighting instructions may also be found on the
pull out lighting instruction labels attached to
the gas control valve.
SIT Millivolt Gas Valve
Figure 3
Pressure-Tap
(Inlet)
Pilot Stage
Terminal
Pilot Gas
Outlet
Ifyourelectronicapplianceisequippedwithan
optionalremotewallswitchorremotecontrolkit
theappliancemainburnermaybeturnedonand
off with the wall switch or remote control.
Ground
(TP)
Ifyourelectronicapplianceisnotequippedwith
awallswitchorremotecontrol,themainburner
must be turned off and on with a gas control
switch located in some other location by the
installer. Contact the installer for directions.
P I L O T
HI
LO
Supply Gas
Inlet
Gas Outlet
To Burner
Variable Flame Height adjustment
Burner Stage
Terminal
Regulator
Mounting Screw
Pressure-Tap
(Manifold)
1. All millivolt appliances are equipped with a
variable gas control valve. Flame height for
these models may be adjusted through a
range between fixed low and high settings
while the appliance is in operation. Adjust
the flame height as desired after lighting the
appliancebyrotatingthevariableadjustment
control knob (HI/LO) located on the front of
the valve (refer to Figures 3 & 4 ).
Dexen Electronic Gas Valve
Figure 4
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
4
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2. During the first initial burns of these appli-
ances, there will be some odor emitted (see
Burn-In Period on Page 3 ).
inspect Venting system
clean Logs and Burner
The appliance and venting system should be
thoroughly inspected before initial use and
at least annually by a qualified service techni-
cian (inspection should include ensuring that
exhaust or intake passages are unobstructed
and vent components are properly assembled
and not damaged).
Carefully remove the logs (use care when han-
dlingthefiberlogs,astheybecomequitefragile
after curing). Vacuum out any foreign matter
(lint, carbon, etc). on the burner. Ensure the
burner ports are “open.” Remove any carbon
deposits from the under side of the logs using
a vacuum cleaner, or a soft bristled brush (i.e.
paint brush). Note: Improper positioning of
logs can create carbon build-up and will alter
the performance of the appliance.
3. Keep the lower control compartment clean
by vacuuming or brushing at least twice
a year. More frequent cleaning may be
required due to excessive lint from carpet-
ing, bedding materials, pet hair, etc. it is
veryimportantthatcontrolcompartments,
burners, circulating air passageways
and air venturi on the appliance are not
obstructed in any way.
If the venting system is disassembled for any
reason, a qualified service technician should
follow vent installation instructions for proper
reassembly and proper sealing of the venting
system components. However, more frequent
periodic inspections and cleanings should be
performed by the homeowner.
replacing Logs -
If the logs become damaged by accident or im-
proper handling and need replacement, use only
the proper replacement logs from manufacturer
(see Pages 26 & 27 for ordering information).
4. Always turn off gas to the pilot (millivolt
appliances) and let the appliance cool down
before cleaning. Before re-lighting, refer
to the lighting instructions in this manual.
Lighting instructions may also be found
on the pull out lighting instruction labels
attached to the gas control valve.
cleaning Glass
(seeFrontGlassEnclosurePanel, Removaland
Installation on Page 6 )
re-install embers and Logs - Carefully follow
placement instructions on Pages 7 to 9 ). All
logs should fit onto corresponding pins and/or
log stoppers. This will ensure a proper flame
and safe combustion.
Note: Cleanglassafterfirsttwoweeksofopera-
tion(afterBurn-Inperiodisover)andthenonly
when necessary and when the fireplace is cool.
Wipesurfacewithclean, dampened, softcloth.
Followwithdry,softtowelasdesired.Takecare
not to scratch the glass surface.
inspect Wiring
Refer to wiring diagrams on Page 12.
5. Always keep the appliance area clear and
free from combustible materials, gasoline
and other flammable liquids.
WarninG: Label all wires prior
to disconnection when servicing
controls. Wiring errors can cause
improper and dangerous opera-
tion. Verify proper operation after
servicing.
The viewing glass should be cleaned periodi-
cally to remove any build-up caused from the
following:
6. Remember,Millivoltapplianceshaveacontinu-
ousburningpilotflame. Exercisecautionwhen
using products with combustible vapors.
iMportant: do not use abrasive
cleaners on glass. never clean the
glass when it is hot.
Maintenance
(see Maintenance schedule, Page 22)
Refertothemaintenancescheduleformaintenance
tasks, procedures, periodicity and by whom they
shouldbeperformed. Alwaysverifyproperopera-
tion of the appliance after servicing.
Inspect and clean all wire connections. Ensure
that there is no melting or damage. Inspection
should include:
• Terminals at the Valve
• OFF/ON Switch
• (Optional Control Switch) Wall Thermostat,
Remote Control or Remote Wall Switch Kit
• During start-up, it is normal for condensa-
tion to form on the inside of the glass (this
condensation and fog will usually disappear
in a few minutes). The moisture can cause
lint, dustandotherairborneparticlestocling
to the glass surface.
• Initial curing of the high temperature paint
and burning off of lubricants used in the
manufacturing process may result in a film
on the glass.
WarninG: turn off gas and elec-
trical power before servicing the
appliance.
inspect Burner Flame appearance
Ensure that the burner flame appearance
resembles the flame shown in Figures 9 &
10 and as described in Flame Appearance and
Sooting on Page 10. The Homeowner must
contact a qualified service technician at once
if any abnormal condition is observed.
• A white coating may form on the glass as a
result of impurities and minerals in the fuel.
caution: Wearglovesandsafety
Glassesforprotectionwhiledoing
required maintenance.
It is recommended that the glass be cleaned
two or three times during each heating season,
depending on the circumstances present. The
following cleaning solutions are approved for use
to clean glass:
• Non-ammonia based household cleaner
• 50%-50% mix of white vinegar & water
• Gas fireplace/stove glass cleaner
iMportant: always verify proper
operation after servicing.
small area paint touch-up
The finish of the appliance is a high-qual-
ity powdercoat. Only use factory supplied
powdercoat paint kit for touch-ups. Paint is
availableatyourlocalauthorizedLennoxHearth
Products dealer. Never attempt to paint a hot
fireplace.
Before re-lighting the fireplace, refer to the
lighting instructions in this manual. instruc-
tions are also found on pull-out panels
located below the glass door in the control
compartment.
inspect Glass Gasket - Visually inspect the
gasket on the backside of the glass enclosure
panels. The gasket surface must be clean, free
of irregularities and seated firmly.
Donotattempttorepainttheapplianceuntilthe
finish is completely cured (see Burn-In Period
onPage3).Ifthesurfacelaterbecomesstained
ormarred, itmaybelightlysandedandtouched
up with spray paint.
5
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removing Glass enclosure panels
(see Figure 5)
Front Glass enclosure panel, removal
and installation
Header
Spacing
Guides
1. To access the glass door securing latches,
firstopenthelowercontrolcompartmentdoor
(Figure 5) by lifting and pulling the bottom
panel forward.
WarninG: do not operate appli-
ance with the glass front removed,
cracked or broken. replacement
of the glass should be done by
a licensed or qualified service
technician.
5/8”
Nailing
Flange
2. Pull the latches forward and down to release
them from the door channel.
1/2”
Nailing
Flange
3. Pull the bottom of the door out a few inches
and grasp it on the right and left. Gently lift to
release the door from its channel above the
door. Pull the door forward.
WarninG: do not attempt to
substitute the materials used on
this door, or replace cracked or
broken glass with any materials
other than those provided by the
appliance manufacturer.
Glass
Door
4. Retrieve the glass door. Visually inspect the
gasket on the backside of the frame. Gasket
surface must be clean, free of irregularities
and seated firmly.
Flush
Nailing
Flange
Glass Door
Spring Latch
WarninG: Handle this glass
with extreme care! tempered
glass is susceptible to damage
– do not scratch or handle roughly
while reinstalling the glass door
frame.
5. Position the door in front of the firebox
opening with the bottom of the door held away
from the fireplace (Figure 5 ). Hook the top
flange of the door frame over the top of the
firebox frame.
Conrol
Compartment
Panel
Hood
Figure 5 - instaLLinG GLass door
6. Let the bottom of the door frame swing
gentlyintowardsthefireplaceensuringthatthe
gasket seats evenly as the door frame draws
shut.Fastenthetwolatcheslocatedunderneath
the firebox floor to the door's vee-flange. Close
both the latches securely.
WarninG: the glass door of this
appliance must only be replaced as
a complete unit as provided by the
manufacturer. do not attempt to
replace broken, cracked or chipped
glass separately.
7. If desired, install the optional hood. Note
the location of the three clips inside the top air
channel above the door. The clips are equally
spaced on the top surface of the air channel
opening. Use a screwdriver to open the clips
slightly if needed. Engage the back edge of the
eyebrow into the clips to secure.
WarninG: do not attempt to
touch the front enclosure glass
withyourhandswhilethefireplace
is in use.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
6
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Note: This appliance is provided with enough
Glowing Embers for several applications, do
not use all that is in a new bag at one time.
For best glowing effect, replace the ember
material annually.
instaLL VoLcanic stone, GLoWinG
eMBers and LoGs
WarninG: do not attempt to
install the logs until the appliance
installation has been completed,
the gas line connected and tested
for leaks and the initial burner
operation has been checked out.
1. Remove the front glass enclosure panel
(see Removing Glass Enclosure Panels on
Page 6 ).
5. placement of Logs -
All logs that have locating notches or slots to
help ensure that they are properly positioned.
All top logs that rest on lower logs, do so over
notches,indentsornubs. Properlogplacement
is critical to prevent sooting. Logs should be
placedinthegapsbetweentheflamepeaksand
should be positioned so they do not impinge
the flames.
2. Remove log set box from firebox. Next,
remove embers and vermiculite from control
compartment. Handle logs carefully to pre-
vent breakage.
WarninG: the size and position
of the log set was engineered to
givetheapplianceasafe,reliable
and attractive flame pattern. any
attempt to use a different log set
in the fireplace will void the war-
rantyandwillresultinincomplete
combustion, sooting, and poor
flame quality.
3. installdecorativevolcanicstone-Sprinkle
the decorativevolcanicstoneinapleasingpat-
tern(seeFigure6). Thevolcanicstoneshould
be placed directly on top of the firebox bottom,
along the slope and to the back at the right and
left sides of the burner. Position any ceramic
fiber liners before placing the stone. Logs can
be positioned after the volcanic stone.
SLDVT-35 - Install the four logs as Follows
Carefully position the ceramic fiber logs over
the burner as shown in Figure 8. Logs should
be placed in the order shown and per the fol-
lowing instructions.
Volcanic Stone
1. Place the left front log (1) as shown. Posi-
tion it on the two left front log brackets.
2. Placetherightfrontlog(2)asshown. Posi-
tion it on the two right front log brackets.
3. Place the left rear log (3) as shown. Posi-
tion it on the upper and lower left rear log
brackets.
WarninG: this appliance is
not designed to burn wood. any
attempttodosocouldcauseirrep-
arable damage to appliance and
prove hazardous to your safety.
4. Place the right rear log (4) as shown. Posi-
tion it on the right rear log bracket. Note that
the hole on the bottom of the right rear log
rests over the "Nub" on the right front log.
WarninGs: if logs are not
installed according to the log
installation instructions, flame
impingement and improper com-
bustion could occur and result in
soot and/or excessive production
of carbon monoxide (co), a color-
less, odorless, toxic gas.
Place Volcanaic
Stone As Shown
SLDVT-40 - Install the four logs as Follows
Figure 6
Carefully position the ceramic fiber logs and
twigs over the burner as shown in Figure 9.
Logs should be placed in the order shown and
per the following instructions.
4. Placement of Glowing Embers -
Separate the Embers (rockwool) into pieces
about thesizeofaquarter(seeFigure7). Keep
the pieces fluffed up, not matted. Distribute
these pieces over the surface of the burner,
as shown in Figures 8 & 9. Do not use more
thanisnecessary. Ensurethatthemainburner
slotsremainuncoveredbytheembermaterial.
Position the embers on the small holes of the
ember bed area.
reFerence
Firebox accessories / parts
1. Place the ember chunk (1) over the tab on
the rear log support as shown.
cat. no.
Modelno.
description
2. Place the left front log (2) as shown. Posi-
tion it on the two left front log brackets.
3. Placetherightfrontlog(3)asshown. Posi-
tion it on the two right front log brackets.
4. Placetheleftrearlog(4)asshown. Position
it on the left rear log bracket.
5. Place the right rear log (5) as shown. Posi-
tion it on the right rear log bracket. Note that
the hole on the bottom of the right rear log
rests over the "Nub" on the right front log.
88L53
FGe
Bag of Glowing embers
(1 oz. rockwool)
Bag of decorative
Volcanic stone
80L42
FdVs
Table 8
Glowing Embers
Separate into Quarter
Size (separate) Pieces
Bag of Glowing
Embers (rockwool)
Figure 7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
7
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