Montigo L38DF-ST series Instruction manual

For Your Safety:
Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
Safety Notice:
Glass doors on gas fireplaces are extremely hot while the fireplace is on and remain
hot even after the fireplace has been turned off. Safety screens are available and
can reduce the risks of severe burns.
®
C US
XG0810 Canadian Heating Products Inc. Langley, BC V4W 4A Montigo Del Ray Corp. Ferndale, WA 98248 092109
L38DF-ST
Indoor
Warning:
Improper installation,adjustment,alteration,serviceor maintenancecan cause
injury or property damage. Refer to this manual. For assistance or additional
information consult a qualied installer, service agency or the gas supplier.
Warning:
What to do if you smell gas
• Do not try to light any appliance.
• Do not touch any electrical
switch; do not use any phone in
your building.
• Immediately call your gas
supplier from a neighbor's
phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas
supplier, call the re department.
Installation Operation & Maintenance Manual
Check local codes and read all instructions
L38DF-ST Gas Fireplace
L38DF-ST Indoor Shown
• Installer: Leave this manual
with the appliance.
• Consumer: Leave this
manual for future reference.
f i r e f e a t u r e
www.montigo.com

Page 2
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Warning:
Read this manual before installing, operating or troubleshooting this
appliance. Please retain this owner's manual for future reference.
Congratulations
Congratulations on selecting a FireFeature gas replace, an ela-
gent and well designed gas replace built to your specications.
The Firefeature gas replace you have selected is designed to
provide the utmost in safety, reliability, and engineering stand-
ards.
As the owner of this new replace, you'll want to read and care-
fully follow all the instructions contained in this Installation,
Operations and Maintenance manual. Pay special attention to all
cautions, warnings, and Important warnings.
This owner's manual should be retained for future reference. We
suggest that you keep it with all your other important documents
and product manuals.
The information contained in this owner's manual, unless noted
otherwise, applies to all models, and gas control systems.
Your new FireFeature gas replace will give you years of
durable, reliable use. Welcome to the FireFeature family of gas
replace products.
Safety Alert Key:
• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.
• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.
• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE: Used to address practices not related to personal injury.
•Important: Used to address practices not related to personal injury.
Congratulations
Safety Alert Key
Introduction............................................................................... 3
Installation
Installing and Framing the Fireplace.............................. 4
Installing the Gasline...................................................... 5
Vent Installation.............................................................. 5
Installation Requirements .................................. 5
Installing the Remote Switch ............................. 5
Vent Terminations .............................................. 6
  InstallingtheNailingange................................ 6
Top Vent Runs...........................................................7 - 9
Side Vent Runs ....................................................... 9 - 11
Installing thePower Vent........................................ 11 - 12
 Finishingaroundthereplace
Fireplace Facing .............................................. 12
Mantels and Surrounds ................................... 12
Wiring ......................................................................... 13
Wiring for the Optional Fan Kit......................... 13
Table Of Contents
Removing and Installing the Door ..................................... 13 - 14
Operation .........................................................................15 - 18
Maintenance ....................................................................18 - 19
Troubleshooting.....................................................19 - 20
Spare Parts .................................................................. 20
Warranty ................................................................................. 21
Appendix
A. Termination Locations.............................................. 22
B State of Massachusetts / Amendment ..................... 23

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L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Introduction
Thank You for choosing a Montigo Gas Fireplace.
About this Fireplace:
The L38DF-ST (See-thru) isareplacewithalinear-styleburner.This
replacecanbeconvertedtobothaTopVentorRearVentapplication,
and is available in the models below.
The L38DF-ST (See-thru) is rated for Natural Gas or Propane at 27,000
BTU/H (7.91 Kilowatts) Input.
► L38DF-ST; Top Vent, Millivolt Pilot.
► L38DF-ST-F; Top and Rear Vent, SIT (IPI Electronic)
This manual covers installation, operation and maintenance. Lighting,
operation and care of this replace can be easily performed by the
homeowner. However, all installation and service work should be
performedbyaqualiedorlicensedinstaller,plumber,orgastterwho
isqualiedorlicensedbythestate,province,region,orgoverningbody
in which the appliance is being installed.
This manual covers all models and unless otherwise specied, the
designation L38DF-ST refers to all variations of the model above.
Sectionswhicharespecictoaparticularvariationaremarkedwitha
symbol, plus the appropriate model number.
Warranty and Installation Information:
The Montigo warranty will be voided by, and Montigo disclaims any
responsibility for, the following actions:
►   Modication of the replace and/or components including Direct-Vent
assembly or glass doors.
►UseofanycomponentpartnotmanufacturedorapprovedbyMontigoin
combinationwiththisMontigoreplacesystem.
►Installationotherthanasinstructedinthismanual.
Consult your local Gas Inspection Branch on installation requirements
forfactory-builtgasreplaces.Installation&repairsshouldbedoneby
aqualiedcontractor.
Installations in Canada must conform to the current CAN/CGA B-
149.1 and .2 Gas Installation Code and local regulations. If the optional
air-circulating fan kit is installed, it must be electrically grounded in
accordance with CSA C22.1 Canadian Electrical Code Part 1 and/or
Local Codes.
Installations in the USA must conform to local codes, or in the absence
of local codes to the National Fuel Gas Code, ANSI Z223.1-1988. If the
optional air-circulating fan is installed, it must be grounded in accordance
with local codes or, in the absence of local codes, with the National
ElectricalCode,ANSI/NFPA70-1987.WithintheStateofMassachusetts
thisreplacemustcomplywithNFPA-54 Chapter 10.
CAUTION!
Due to its high operating temperatures, the appliance
should be located out of traffic & away from furniture and
draperies.
Children and adults should be alerted to the hazards
of the high surface temperature, which could cause
burns or clothing ignition.
Young children should be carefully supervised when
they are in the same room as the appliance.
Clothing or other flammable materials should not be
placed on or near the appliance.
WARNING!
When this appliance is installed directly on carpeting, tile or any
combustiblematerialotherthanwoodooring,itmustbeinstalled
on a metal or wood panel extending the full width and depth of
the appliance.

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L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Installation
Installing The Fireplace Shell
The L38DF-STreplacemaybeinstalledinanylocationthatmain-
tains proper clearances to air conditioning ducts, electrical wiring and
plumbing.Safety,aswellasefciencyofoperation,mustbeconsidered
whenselectingthereplacelocation.Trytoselectalocationthatdoes
notinterferewithroomtrafc,hasadequateventilation,andoffersan
accessible pathway for Direct Vent installation. Refer to page 4 - Vent
Installation for more information.
Thereplacedimensionsareshownbelow:
Wheninstallingashelfoverthetopofthereplace,thefollowingguidelines
mustbeadheredto: ForRearVentapplicationstheminimumclearancefrom
thetopofthe L38DF-STreplacetoashelfis10".ForTopVentapplications,
the minimum clearance are shown in the clearance table. (Minimum
2" clearance must still be maintained around the vent pipes.)
Figure 2. Framing dimensions.
Framing
Top View
Front View Side View
Clearances
These clearances apply to all dimensions except the framed
opening, where the clearance to combustibles is 0". The L38DF-ST
clearance to unprotected combustible walls which are perpendicular to
thereplaceopening,mustnotprojectbeyondtheshadedareashown
in Figure 24.
For protection against freezing temperatures, it is recommended that
outer walls of the chase be insulated with a vapor barrier. This will reduce
thepossibilityofacold-airconvectioncurrentonthereplace.
Figure 1. Fireplace dimensions.
* Clearance from top of the Fireplace to a combustible ceiling within the fireplace
enclosure.
** Refer to Pages, 10 & 11.
17 1/2"
Sides 1"
Floor
0"
Mantle 4"
Top (Top Vent)
L38DF-ST
10"
Top (Rear Vent)
Back 3”
Vent Ring
2"
10
min.
shelf
supplied shield
RHS101
39 1/2 min
17 1/2
min
PEL Short
90 elbow
shelf
supplied shield
RHS101
Figure 2a. Framing dimensions. (Top Vent)
Figure 2b. Framing dimensions. (Rear Vent)
WARNING!
When this appliance is installed directly on carpeting, tile or any
combustiblematerialotherthanwoodooring,itmustbeinstalled
on a metal or wood panel extending the full width and depth of
the appliance.
6 1/4”
5 1/4”
18”
2
9 1/2” 33 3/4”
5” 8”
24”
35 1/4”
opening 1 1/4”
1 1/4”
1 1/4”
1
”37 3/4”
37 3/4”
7”
24”
36 3/8”
8”
5”
26 3/4”
opening
40”
41”
23 3/4”
40”
34 1/2”
Both walls Typical. May
not be exactly as shown.
Notes:
Install supplied metal header (Part
No#L38ST060) above fireplace
after unit is in place. Use supplied
hardware to fasten to framing.
Both sides Typical. Unit may not
be exactly as shown.

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L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
7”
1 3/4”
2 3/8”
1 3/4”
Installation
Installing The Gas Line
The gas line must be installed before completing the installation of the
L38DF-ST Fireplace. Natural Gas requires a minimum inlet gas supply
pressure of 5.5" W.C. & a manifold pressure of 3.5" W.C. Propane
Gasrequires a minimuminlet gas supplypressure of11"W.C. & a
manifoldpressureof10"W.C.Provisionmustalsobemadefora1/8"
N.P.T. plugged tapping and be accessible for test gauge connection
immediately upstream of the gas supply controls to the appliance. The
replacegasconnectionandthemainoperatinggasvalveislocated
behind the removable trim at the bottom of the unit and need only be
attachedtothegaslinewithanapprovedtting,asrequiredbythe
applicable installation codes.
To access the replace gas connection the main burner must be
removed as shown below in gure 5a.
•Onlyusegasshut-offvalvesapprovedforusebythestate,province,
region, or governing body, in which the appliance is being installed, or
as required by the applicable installation codes.
•Flexiblegasconnectorsmustnotexceed3feetinlength,unlessitis
allowable within applicable installation codes.
Note: After gas line is connected, each appliance connection,
valve and valve train must be checked while under normal
operating pressure with either a liquid solution, or leak
detection device, to locate any source of leak. Tighten any
areas where bubbling appears or leak is detected until
bubbling stops completely or leak is no longer detected.
DO NOT use a flame of any kind to test for leaks.
Figure 5a. Gas line access.
The appliance and its individual 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 appliance must be isolated from the gas supply piping system by
closing its individual manual shut-off valve during any pressure testing
of the gas supply piping system at test pressures equal to or less than
1/2 psig (3.5 kPa).
Vent Installation
This section covers the installation of direct venting and terminations.
Installation Requirements
QL38DF-ST model fireplaces are certified for use with Montigo Standard
Series (5" / 8") venting components.
QMinimum clearance to combustible construction around the vent pipe
is 1" on all sides, except on horizontal venting where the top of the pipe
must have a clearance of at least 2".
QUse only certied Montigo vent components. (Use of other parts will void the
Montigo warranty, and may impede the operation of the fireplace.)
QAll joints must be secured with a minimum of two screws per joint
QVent terminations must not be recessed in walls or siding
QHorizontalrunsmustbesupportedbyaminimumoftwosupportsperhorizontal
run. A minimum of one screw on each side of support is also required
QFlex vent sections may be stretched up to 50% of their total length (eg. a
24" section may be stretched to 36")
QFlex vent sections over 6 feet must fall within the limits set by the venting
graph and must have a minimum vertical rise of 3 inches per foot of flex.
QSolid vent sections may be cut less than half way from the female end
QVentingcomponents can be usedin any combinationof solid/rigid pipeor flex
pipe and in any orientation (Male connectors can face in any direction)
Installing The Remote Switch
The L38DF-ST's gas valve is located behind the lower trim, and may
be connected to a wall switch. The valve generates its own power on
a millivolt circuit. Use only low voltage wire, and DO NOT connect
any external power to it.
Note:Theswitchlocationmustnotexceed30'fromthereplace.
Figure 2. Back frame dimensions.
Backframe Min. 37 3/4”
CAUTION:
Do not obstruct, or attempt to conceal, the vent termination.
These actions will affect the operation of the fireplace, and may
be hazardous.
In heavy snow areas, take extra care to prevent snow buildup
from obstructing the vent termination.
CAUTION!
Duetoitshighoperatingtemperatures,theapplianceshould
belocated outoftraffic &away fromfurniture and draperies.
Children and adults should be alerted to the hazards
of the high surface temperature, which could cause
burns or clothing ignition.
Young children should be carefully supervised when
they are in the same room as the appliance.
Clothing or other flammable materials should not be
placed on or near the appliance.

Page 6
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Installation
Installing Terminations with Built-In Frames
Installing Terminations with MSR Frames
12
12
1. Frametheterminationopeningto12"x12".
2. Fasten the termination to the studs using a minimum of 4 screws.
11
11
1. Frametheterminationopeningto11"x11".
2. Fasten the termination to the studs using a minimum of 4
screws.
Installing Terminations with MOSR Frames
1212
12
MOSR
1. Frametheterminationopeningto12"x12".
2. Fasten the MOSR frame to the interior side of the studs using a
minimum of 4 screws.
3. Insert the termination into the MOSR frame as shown here, and
attach by screwing through the four pilot holes in the termination.
MSR
PTO-3 (5"/8")
PTO-3F (5"/8")
PTO-3 (5"/8")
PTKOG (5"/8")
1. Ensure that the two long mounting brackets are facing the bottom
ofthe termination.(See inset).Thiswill provide more heatprotection
at the top of the termination, where temperatures are highest.
2. Attach to the faceplate of the termination using four sheet metal
screws.
3. Ifinstallingtheterminationover Vinylsiding,UsetheVSSTermination
shield. Montigo Installation document, XG1301.
Installing Heat Guards over Terminations
Figure 6c. Installing the Nailing Flange Extension.
Figure 6. Installing the VSS Vinyl Shield.
Figure 5a. Installing a PTO termination.
Figure 5b. Installing a PTO termination with the MSR frame.
Figure 5c. Installing a PTO termination with the MOSR frame.
Figure 5d. Installing a PTO termination heat guard.
Installing the Nailing
Flange Extension
Oncethereplaceisplacedintotheroughframedopening,andthe
supplied steel lintel is in place, (Part No. L38087) (see Figure 6c),
the supplied nailing extension must be placed along the top edge of
thereplaceandsecurelyfastenedinplacetothemetallintel,and
combustiblewoodframing.Note:Thenailingangeextensioncanbe
substituted with a piece of NON-Combustible material of the same
size and thermal characteristics, ie: cement board or equivilent.
Part No. L38087

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L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
39 1/2”
A
C
B
42” NG & LP
Installation
Top Vent Venting Runs
Example A: (Acceptable Installation)
Iftheverticaldimensionfromthehearthis108"andthehorizontal
runtothewallangeoftheventterminationis180",thiswouldbe
an acceptable installation.
Example B: (Acceptable Installation)
Iftheverticaldimensionfromthehearthis48"andthehorizontal
runtothewallangeoftheventterminationis72",thiswouldbe
an acceptable installation.
Example C: (Unacceptable Installation)
Iftheverticaldimensionfromtheoorofthereplaceis60"and
thehorizontalruntothewallangeoftheventterminationis144",
this would NOT be an acceptable installation.
Figure 7. L38DF -ST Top Vent Venting Graph
NOTES: All dimension lengths for vertical or horizontal runs are
measured from centre of the vent pipe.
Venting runs must fall within the limits set by the venting
graph (see Figure 7).
Figure 8. Retracted Installation using a combination of solid and ex
venting. Use the vent graph to determine your allowable
run, then select appropriate components.
RHS8
1 MIN
1 MIN
1 MIN. Both
sides Typical
RHS8 Heat
Shield
Figure 8a. RHS8 Installation. (Install by sliding over vent pipe where it
passes through the combustible construction.
Figure 8b. RHS101 Installation. (Install by sliding over vent pipe where
it passes through the combustible construction.
Framing
Drywall
RHS101 Heat Shield,
Inner Section.
Vent from fireplace
RHS101 Heat Shield,
Outer Section.
Termination
Power Vent models, LDVPV47
EDVRSPV58, and EDVWSPV58
to be used within the shaded area of
graph. (See Index of this guide for
applicable Product page).
Figure 9. Horizontal ex installation with MIN vertical rise.
B. Vertical (Through-The-Roof) Installations
Vertical rise >12' can be reduced (on applicable models).
Vertical Terminations must be installed:
•minimum 2' (two feet) above the highest point where
vent passes through the roof.
•minimum 6' (six feet) from a mechanical air inlet
•minimum 18" (1 1/2 feet) from a parapet wall.
RHS8
36” max.
42” min.

Page 8
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Installation
Figure 10. Straight, vertical venting showing required PXT-10 adaptor
(supplied with the PVTK-1 termination).
* For venting MIN 1" clearance to all vertical combustibles,
MIN 2" to all horizontal combustibles.
5" / 8" Venting
A - Termination PVTK-1
B - Flex Sections PFL-1(12"Section)
PFL-2(24"Section)
PFL-3(36"Section)
PFL-4(48"Section)
C - Rigid Sections PEXT-1(12"m/fSection)
PEXT-2(24"m/fSection)
PEXT-3(36"m/fSection)
PEXT-4(48"m/fSection)
D - Support Ring
&Plate
PSPXT-8
E - Firestop PS-8
 Maximumventheightis:32feetabovereplace.
Note: Flame characteristics will change if the maximum vent height
is used.
 Minimumclearances2"fromventtoallcombustiblematerialsmust
be maintained.
A maximum of two offsets (each offset has two 90° bends) may be
made and shall not exceed total length of 25% of the vertical vent
height, when measured center to center of piping.
Example: Typical vent installation.
20' vertical vent
2 - 2' offsets required
25% of 20' = 5' max. offset allowed
This venting configuration meets requirements.
PEXT
Figure 11. Vertical venting with 1 oset (1 oset= two 90° bends).
Figure 12. Vertical venting with 2 osets (1 oset= two 90° bends).
* For venting with four 90° a restrictor may need to be used. (PEXT
5/8 Vent).
NOTES: All dimension lengths for vertical or horizontal runs are
measured from centre of the vent pipe.
Venting runs must fall within the limits set by the venting
graph (see Figure 7b).

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L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
2
6 1/2”
A
B
C
Vertical Run (In.)
Horizontal Run (in.)
12” Max
Side Vent Venting Requirements
Ifyourinstallationrequiresmorethan12"ofhorizontalventing,some
vertical lift is required. Use the vent graph below to determine an
acceptableventrun.Unacceptableventingcanaffectthereplace's
performance.
the maximum horizontal vent run is 16 feet
The Venting Graph
Measuretheverticalheightfromthereplacehearthtothecentreof
theterminationandthehorizontalrunfromthefromthereplaceue
collartothewallangeofthetermination.PlotontheVentingGraph
(Figure 13) with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
Example A: (Acceptable Installation)
Iftheverticaldimensionfromthehearthis60",andthehorizon-
talruntothewallangeoftheventterminationis52",thiswould
be an acceptable installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 108" and the hori-
zontal run to the wall flange of the vent termination is 120", this
would be an acceptable installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace is 48" and
the horizontal run to the wall flange of the vent termination is
102", this would NOT be an acceptable installation.
Figure 13. L38DF -ST Side Vent Venting Graph
Installation
CAUTION:
The Installation shown in Figure 12., only 5/8 (PEXT) Vent
to be used.
Power Vent models, LDVPV47
EDVRSPV58, and EDVWSPV58
to be used within the shaded area of
graph. (See Index of this guide for
applicable Product page).
A - Termination PTO-3
PTO-3F
B - Stucco Kits MSR (stucco frame)
MOSR (stucco can)
D - Flex sections PFL-1 (12" section)
PFL-2 (24" section)
PFL-3 (36" section)
PFL-4 (48" section)
E - Rigid sections PEXT-1 (12" section)
PEXT-2 (24" section)
PEXT-3 (36" section)
PEXT-4 (48" section)
F - Extensions PXT- 5 (5" section)
PXT-10 (10" section)
G - 90° elbow PEL-90F/F
PEL-90M/M
H - Heat Shield RHS101 ( for 5"/8" venting)
I - Heat Shield RHS 8 (for Top Venting)
Horizontal Vent Installation
Vent systems that terminate through a wall may comprise up to seven
different components:
Short Congurations:
For installations straight through the wall, use an PTO-3/-3F termina-
tion and PXT-5 or PXT-10 to achieve the desired length. The maxi-
mumhorizontalventrunwithnoverticalliftis12".SeeFigure 14 &
15.
Figure 14. Short horizontal installation.
Heat Shields
Duetohighuetemperatures,theheatshield(RHS101)mustbe
used on all installations straight through the wall, at the point
where the vent pipe connects to the termination. With the heat shield,
ventclearancescanbemaintainedat1".Theheatshieldisnot
includedwiththereplace.
To install the heat shield, slide one section over the vent pipe on the
inside of the wall opening, with the circular portion inside the wall cav-
ity. Screw the shield in place over the wall opening. Install the second
section on the outside of the wall opening sliding the circular portion
into the wall opening. Refer to Figure 15.
26 3/4”

Page 10
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Example:
A 10' section of rigid pipe and a 90° elbow may be used in conjunc-
tion with a 3 ft. flex section (PFL-3) will, when extended in a chase,
allow for a maximum horizontal run of twelve and one-half feet from
the centre of the fireplace to outside wall and a minimum of 7'6" when
retracted in opposite direction. (See Figure 16.)
Long Vent Runs:
For longer or more complex vent runs, vertical lift is required. First
ensure that the planned run is acceptable using the Vent Graph. Plan
out the required components using the chart above. You may be able
to use fewer components using the chart, Figure 13.
Figure 16. Extended horizontal installation using a combination of
rigid and ex venting.
Figure 15. RHS101 Heat Shield for short horizontal installation.
Install by sliding over the vent pipe where it connects to the
termination.
"D" flex sections and "E" solid sections may be used in conjunction
with one another to obtain different possible horizontal length instal-
lations. NOTE: Flex section must not exceed maximum horizontal
length of 3 feet, and for this application the top clearance is to the
ceiling.
Installation
RHS8
Figure 17a. Vertical venting with 1 oset (1 oset= two 90° bends).
Minimum clearance to combustible construction around the
vent pipe is 1" on all sides must be maintained, except on hori-
zontal venting where the top of the pipe must have a clearance of
at least 2".
2. Offset Vertical Installations
A maximum oftwo offsets (each offset has two 90° bends) may be
made if the length of the offsets does not exceed 25% of the vertical
vent height, when measured center to center of piping.
Example: Typical vent installation.
30' vertical vent
2 - 2' offsets required
25% of 30' = 7-1/2' max. offset allowed
This venting configuration meets requirements.
1. Straight Vertical Installation
Figure 17. Straight, vertical venting.
PEXT
Solid Sectio
n
PEXT
Solid
Section
Vertical Vent Installations
 Maximumventheightis30feetabovereplace.
Note: Flame characteristics will change if the maximum vent
height is used.

Page 11
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Figure 17b. Vertical venting with 2 osets (1 oset= two 90° bends).
Installation
Figure 18. Reducing Vertical Vent from 5/8" to 4/7".
Reduced Vertical Installation
(Available with Linear LDVPV47 Power Vent
ONLY)
It is possible to reduce vertical vent runs from 5"/8" venting to 4"/7"
venting. Reduced vertical venting may only be used when the Linear
(In-line) Power Vent is required. This is commonly due to longer than
normal vent runs, or unusually long horizontal Vent runs.
Installing The Horizontal &
Vertical Exterior Power Vent
A Power Vent is required where the Termination is located too far
away from the gas fireplace and/or if the vent run is beyond the scope
of this document, or the specications recommend vent augmenta-
tion. There are four 4/7 Power Vent models available. These Power
Vents are required for Superior venting, safe operation & years of
trouble free operation.
The available Montigo Power Vent models are:
LDVPV47 (Linear, Interior In-line Power Vent, document, XG0700).
EDVPV47 (External Power Vent Module, document, XG0750).
EDVRSPV47 (Exterior Vertical Roof mount 4/7 stainless steel Power
Vent system, document, XG1303)
EDVWSPV47 (Exterior Horizontal Wall mount 4/7 stainless steel Power
Vent system, document, XG1302).
Figure 24. Combustible mantles and facings, (Both Sides Typical).
Horizontal Run (in)
Fireplace Facing
Whenselectingthenishmaterialforyourreplace,itisimportantto
rememberthe following:THEOPENINGMUSTNOTBEOBSTRUCTED
IN ANY WAY - to do so restricts the air supply for the control
compartments and heat exchanger it also prevents access for
servicing controls.
The face of the replace may be painted to match the room decor,
provided you use a heat-resistant paint. Decorative facing must not
extendpastthereplaceopeningatall,becauseitwillinterferewith
the access to retainers for removal of glass door.
Finishing Around the Fireplace
Combustible mantels and mouldings may be safely installed over the
topandonthefrontofthereplaceprovidedthattheydonotproject
beyond shaded area shown in Figure 24.Sidewallclearancesare3".
Combustiblesurroundsmaybeinstalledwith3"clearancetotheside
ofthereplaceasshowninFigure 25.
Non-Combustible
Facing Material
Steel Stud construction
allowable within this area
Top of
fireplace

Page 12
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Installation
N
on-Combustible
F
acing Material
Non-combustible Header
(Supplied by Montigo)
Drywa
ll
/ S
h
eetroc
k
6”
6”
3”
Mantels & Surrounds
NOTE: National Canadian Gas Association mantel test requirements
areforrehazardpreventiontocombustiblematerials.
New technology, to meet consumer and government demands for the
wise use of energy, has prompted us to manufacture many models of
replaceswhicharehot,fuelandenergyefcient.
Please be aware; temperatures over the mantel will rise above normal
roomtemperatureandwallsabovereplacemaybehottotouch.
Figure 25. Combustible surrounds, (Both Sides Typical).
Wiring for the optional Fan Kit
All L38DF-STreplacesmaybe equipped with optional fankits  for
circulating heat into the living space.
Installations in Canada which employ the fans must be electrically
grounded in accordance with CSA C22.1 Canadian Electrical Code
Part 1 and/or Local Codes.
Installations in the USA which employ the fans must be grounded in
accordance with local codes or, in the absence of local codes, with the
National Electrical Code, ANSI/NFPA 70-1987.
For more information see the Fan Kit Installation Guide included with
the fan kit.
NOTE: If any of the original wire supplied with the appliance is replaced, it
must be replaced with the same type, or its equivalent.
Figure 27a. Wiring schematic for optional fans.
G
L2-WH
L1-BLK
p g
Quick Connect
lu to motor
WARNING!
We recommend careful consideration be given to the effects of
elevated mantel temperatures which may be in excess of product
design, for example: candles, plastic or pictures. This can cause
melting, deformation, discoloration or premature failure of T.V.
and radio components.
Painting:
Special care is recommended by the Master Painters and Decorators
Association,whenpaintingthereplacesurrounds,toselectandapply
a quality Alkyd sealer prior to the applying of latex paints. This is
to prevent leaching of water from evaporation and causing a brownish
staining effect to paint over coats.
5/1/60 Supply
G L1 L2
L38DF-ST
L38DF-ST
WARNING!
When covering the upper metal portion of the replace, up to
6"(as shown, Fig.24 & Fig.25) with a non-combustible material
Please Note: The decorative facing materials may be subject to
temperatures in excess of 250° F. This should be considered
when selecting facing materials.
Wiring
Gas Control and Pilot Wiring
Figure 26. Wiring for the L38DF-ST-I with Honeywell gas control and pilot.
Honeywell (Q3450)
Pilot Assembly
Pilot Electrical
Harness Connector
Honeywell Gas
Control (SV9501M)
Gas Control
Connector
Junction Box
115VAC
24VAC
40 VA
Transformer
Black
White
Green
Gnd Screw
Wall Switch
Fan Plug
Receptacle
L38DF-ST-I
WARNING!
Do not attempt to clean glass when hot.
Do not clean glass with abrasive materials as any glass etching
may cause premature glass failure.
Donotoperatethisreplacewithouttheglassdoor,orwitha
broken glass door.

Page 13
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Installation
L38DF-ST
Removing and Installing
the Doors
Removing the doors:
The doors are removed in a few simple steps. Follow these Steps below
to remove the Horizontal access panel, unlatch the door buckles and,
remove the door. Replace in reverse order.
Figure 28a. Loccate the door buckles. (Both Sides Typical)
Door Latch Hook
Door Latch Slot
Hand-hold
Release the Door Buckles
Figure 28. Removing and installing the the Horizontal Acess Panel
Locate the Door Buckles:
Figure 28b. Door buckle Tool
1
Step 4:
Firmly grasp hand-hold
end of Door buckle tool
and place the machined
end in the slot under door
frame. (as shown)
Figure 28c.
Step 2:
Step 3:
Step 1:
Remove the Horizontal cover
byplacingngersinbothnger
holes, then pushng away from
you and lifting out. Place it
aside during maintenance or
cleaning.
Install in reverse order.
Installed Gas
Valve Cover
Finger Holes
Remove the Horizontal Access Panel:
To install the door, hook the top edge of the door frame into place. Lower
thedoorintopositionandfollow theprevious stepsshowninreverseorder.
Installing the Doors:
2
Step 5:
Ensurethetoolisrmly
in the lower end of the
slot, (as shown), Then pull
toward you (Caution: hold
the tool securely).
3
Step 6:
Pull hard if necessary to
release the spring ten-
sion. (Caution: The latch
springs back with force,
hold the tool securely).
4
Step 7:
Remove the tool from
the latch slot. Ensure the
latches are hanging freely,
the hook end is released
from the bottom of the door.
(Repeat all 4-steps for the
remaining latches).
Figure 28d.
Figure 28e.
Figure 28f.
Step 8:
Grasp the Door on either side, usually midway and lift upward, lift
thedoorcarefullyupandawayfromthefrontofthereplace.See
figures28g.Placethe Door asideina safe placewhilemaintenance
and / or cleaning is being performed.
Figure 28g. Removing and installing the glass doors. (Both Sides
Typical)
Removing the Doors:

Page 14
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Installation
Installing the L38DF-ST Glass
Beads and Optional River Rocks
Beads
The L38DF-STreplaceissuppliedwithDesignerGlassbeads.
Remove the Door and trim as shown in the previous Instruction.
Follow these instructions to ensure all parts are removed or replaced
as required. Once the Trim and glass doors are removed place the
marbles randomly across the pan and the burners as described in
Figure 29 to 29d.
Note: (N.G.) Natural Gas models, Only cover the Optional
burner covers with one layer of designer beads.
Figure 29. Installation of the Optional burner covers , (end to end;
place evenly).
Figure 29a. Installation of the designer beads. (Ensure one layer of
beads covers the burner and pilot covers.
Figure 29b. Spreading designer beads evenly .
Propane L38DF-STreplace have the option of installing the
optional cultured rocks or designer glass beads. As described below
(Propane gas), the designer beads or cultured rocks cannot cover the
burners.Doingsoproducesanundesireable/unevenamepattern,
and eventual sooting.
www.montigo.com
Note: (LP gas) Ensure the optional river rocks or designer
glass beads do not cover the Burners.
Figure 29c. Completed glass bead installation.
Figure 29d. Operating Natural gas replace with one layer of designer
glass beads.
Figure 30. Completed glass bead installation. (Note: place glass
beads on top of mesh pilot cover.
Figure 30a. Operating Propane gas replace with designer glass
beads surrounding burner tray.
Optional River Rocks
The L38DF-STreplacehastheoptionofinstallingthecultured
rocks which mimic real stone. These may be spaced at random, or
in a visual pattern of your preference. See the Montigo web site for
photographs and ideas.
www.montigo.com

Page 15
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Operation - Model L38DF-ST
L38DF-ST
with Continuous Pilot
WARNING: If you do not follow these instructions exactly, a re or explosion may result
causing property damage, personal injury or loss of life.
QIf you cannot reach your gas supplier, call the Fire
Department.
C. Use only your hand to push in or turn the gas control knob.
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. Force
or attempt to 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 under water.
A. This appliance has a pilot which must be lighted by hand.
When lighting the pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor.
What To Do If You Smell Gas:
QDo not try to light any appliance.
QDo not touch any electrical switch; do not use any phone
in your building.
QImmediately call your gas supplier from a neighbour's
phone. Follow the gas supplier's instructions.
To Turn Off Gas To Appliance:
3. Push in gas control knob slightly and turn clockwise to
"Off". Do not force.
4. Replace the lower Horizontal access panel.
1. Turn off remote switch.
2. Lift out the lower Horizontal access panel.
1. STOP! Read the safety information above on this label.
2. Lift out the lower Horizontal access panel.
3. Push in gas control knob and turn clockwise to "OFF."
4. Wait five (5) minutes to clear out any gas. Smell for gas,
including near the floor. If you then smell gas, STOP! Follow
"B" in the safety information above on this label. If you don't
smell gas, go to the next step.
5. Locate pilot burner (See illustration at right.) and follow steps
below.
6. Turn knob on gas control counter clockwise to
"PILOT."
7. Push in gas control knob completely and hold. Light with Piezo
Igniter button. Continue to hold the control knob in for about
(1) minute after the pilot is lit. Release the knob and it will pop
back up. Pilot should remain lit. If it goes out repeat steps 3
through 8.
QIf knob does not pop up when released. Stop and
immediately call your service technician or gas
supplier.
QIf the pilot will not stay lit after several tries, turn the gas
control knob to "OFF" and call your service technician
or gas supplier.
8. Push in gas control knob and turn
counter-clockwise to "ON."
9. Replacethe lower Horizontal access
panel.
Lighting Instructions:
For Your Safety - READ BEFORE LIGHTING:
NOTE: Gas control knob cannot be turned from
"PILOT"to"OFF"unlessknobispushed
in slightly. Do not force.

Page 16
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Operation

Page 17
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
B-Series BF-A
L-Series DF-I Operation - Model L38DF-ST-F L38DF-ST-F
To Turn Off Gas To Appliance:
1. Turn off remote switch.
2. Remove the lower Horizontal access panel.
3. Turn the incoming gas control valve to "Off".
4. Replace the lower Horizontal access panel.
with American Flame Electronic Ignition
For Your Safety - READ BEFORE LIGHTING:
with Proflame SIT Electronic Ignition
Lighting Instructions:
C. Use only your hand to push in or turn the gas control knob.
Never use tools. If the knob will not push in or turn by
hand,don'ttrytorepairit,callaqualiedservicetechnician.
Forceorattempttorepairmayresultinareorexplosion.
D. Do not use this appliance if any part has been under
water.Immediatelycallaqualiedservicetechnicianto
inspect the appliance and to replace any part of the control
system, and any gas control which has been under water.
A. This appliance is equipped with an ignition system that
lights the pilot burner automatically. Do not attempt to light
the pilot by hand.
B. BEFORE LIGHTING smell all around the appliance area for
gas.Besuretosmellnexttotheoorbecausesomegas
isheavierthanairandwillsettleontheoor.
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 neighbour's
phone. Follow the gas supplier's instructions.
If you cannot reach your gas supplier, call the Fire
Department.
1. STOP! Read the safety information above on this label.
2. Remove the lower Horizontal access panel.
3. TurnIncominggasvalvetotheON"position.
4. Wait 5 minutes to clear out any gas. If you smell gas,
STOP!Follow"B"inthesafetyinformationaboveonthis
label. If you don't smell gas, go to the next step.
5. Turnwallswitch"ON".
6. If the Fireplace does not light, the System will cycle through
two trials, (one minute audible clicking, thirty seconds of
silence, and then another one minute of audible clicking).
Ifthesystemlocksoutduetoinadequategasow,referto
"Troubleshooting",Page20.
7. After completion of the information in the Troubleshooting
section, Repeat step 5.
8. If the system will not function correctly, follow the instruc-
tions"ToTurnOffGasToAppliance"andcallyourservice
technician or gas supplier.
EV1 (Pilot
burner)
EV2 (Main
burner)
Pilot Adjust Screw
Lockout Reset Key
Diagnostic Terminal
Power
Command (Wall
switch)
Pilot Sensor
Igniter
Ground
EV1 (Pilot burner)
EV2 (Main burner)
Gas "Out"
Gas "In"
Incoming Gas
Line, Shut-off
Valve
To fireplace
Main burner
WARNING: If you do not follow these instructions exactly, a re or explosion may result
causing property damage, personal injury or loss of life.

Page 18
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Maintenance
General
QHave the replace and installation inspected yearly.Theinspection
must include, but is not limited to, the following:
• A visual check of the entire vent system and termination.
• An inspection of  the explosion relief appers and the door
gasketing to ensure a proper seal.
•An inspection of the burner, venturi, and primary air openings.
•  Aninspectionofthegasvalve,gascomponents,andpilotame.
Foryourconveniencea1/8"manifoldpressuretapissupplied
on the gas valve for a test gauge connection. See Figure 32.
• Inspection of all optional equipment; fans, thermostats, etc.
QFor Natural Gas this appliance requires a minimum inlet pressure
of5.5"W.C.andamanifoldpressureof3.5"W.C.
QFor Propane Gas this appliance requires a minimum inlet pressure
of11"W.C.andamanifoldpressureof10"W.C.
QAlwayskeepthereplaceareaclearandfreeofcombustiblematerials,
aswellasgasolineandotherammablevaporsandliquids.
QDonotusethisapplianceifanyparthasbeenunderwater.Immediately
callaqualiedservicetechniciantoinspecttheapplianceandto
replace any part of the control system and any gas control which
has been under water.
Operation
Lighting Instructions
See pages 13 to 15.
Burner Adjustment
The L38DF-ST is equipped with an adjustable burner, allowing you to
raiseorlowertheames.Toadjusttheames,locatetheblackknob
marked 'Hi-Lo', in the centre of the gas control valve (See Figure 32).
The front burners are not adjustable.
QToraisetheameheight,turntheblackknob(locatedbehindthe
lower trim) counter-clockwise.
QTolowertheameheight,turnclockwise.
Figure 32. 'Hi-Lo' Adjustment on the L38DF-ST's gas valve.
Cleaning
Whenthereplaceisrstactivated,theremaybesomesmokingand
avisiblelmmaybeleftontheglass.Thisisanormalcondition,andis
the result of burning of protective coatings on new metal.
QGlassmustbecleanedperiodicallytoremoveanylm(whichisa
normal by-product of combustion) which may be visible. Film can
easily be removed by removing the door, as shown on page 12.
Handle the door carefully, and clean it with non-abrasive glass
cleaners. One of the most effective products is Kel Kem.
QSiliconesealsoninnerdoorduringinitialringwill"offgas",leaving
avisual deposit ofa whitesubstanceon combustion chamberwalls.
This can easily be removed using normal household products.
QUse a vacuum cleaner or whisk broom to keep the control
compartment,burner,andreboxfreefromdustandlint.
QLinear Burners may be cleaned periodically with a vacuum to
remove soot or other contaminates.
Note: L38DF-ST-I models (electronic ignition)
do not feature hi/lo adjustment.
'Hi-Lo' Adjustment Knob
WARNING!
Do not attempt to clean glass when hot.
Do not clean glass with abrasive materials as any glass etch-
ing may cause premature glass failure.
CAUTION!
Fireplace gas control must be in the “OFF” position and pilot
and main burners extinguished when cleaning appliance with
a vacuum.
Doors can get very hot. Handle only when cool.

Page 19
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Maintenance
Gas Control Valve Troubleshooting
Manifold Pressure
Test Connection
Pilot Adjustment Screw
Inlet
Pressure
Power
Generator
Wall Switch
Figure 33. Sit Nova 820 gas valve.
Pilot Burner Adjustment
1. Locate Pilot Adjustment Screw. (See gure 33.)
2. Adjustpilotscrewtoprovideproperlysizedameasshownin
gure 34).
3. After installing or servicing, leak test with a soap solution with
main burner on. Coat pipe and tubing joints, gasket etc. with soap
solution. Bubbles indicate leaks. Tighten any areas where the
bubbles appear until the bubbling stops completely.
Figure 34. Pilot Burner.
Troubleshooting
The following is a troubleshooting chart of possible problems:
PROBLEM CORRECTIVE ACTION
Noisy Pilot Flame Locate pilot adjustement screw on
gascontrolvalve. Flameisdecreasedby
turning adjustment screw clockwise.
Pilot won’t ignite Disconnect remote wires and try to
light pilot. If pilot now works, remote
connections are faulty. Check wiring
diagram gure 33.
Main burner will 1. Check wiring (see gure 33).
not light 2. Check wall switch for proper con-
nection.
Ifyourreplacestilldoesnotoperatecorrectly,consultyourdealeror
the manufacturer.
All service and repairs should be performed by a qualied
agency.
Allspareparts,optionalfans,andoptionaltrimnishesareavailable
from your local dealer or the manufacturer.
L38DF-ST-I
L38DF-ST

Page 20
L38DF-ST See-thru Indoor Gas Fireplace
Part No. XG0810 - 092109
f i r e f e a t u r e
Maintenance
Spare Parts - L38DF(O)-ST
NG Gas Valve RGC1006
LP Gas Valve RGC1005
NG Pilot RPA020
LP Pilot RPA021
Burner NG RBL38501
Burner LPG RBL38502
ROR1151
Door RDTL38
Base
L38DF-ST
ROR1152
Oriface LPG
Oriface NG
L38DF-ST-I
RGC1004
RGC1003
RPA003
RPA004
ROR1151
ROR1152
RDTL38
L38DF-ST-A
RGC3033
RGC3034
RPA052
RPA053
ROR1151
ROR1152
RDTL38
Troubleshooting
Follow this information to reset the SIT System:
1. Locate the lead to the battery backup, (remove)
(Refer to schematic, below)
2. Locate the AC/DC wall transformer, (Unplug connector)
(Refer to schematic, below)
Ifyourreplacestilldoesnotoperatecorrectly,consultyourdealeror
the manufacturer.
1.
2.
L38DF-ST-F