Montigo L38DF-ST series Instruction Manual

For Your Safety:
Do not store or use gasoline or other ammable vapors and liquids in the
vicinity of this or any other appliance.
Safety Notice:
Glass doors on gas replaces are extremely hot while the replace is on and remain
hot even after the replace has been turned off. Safety screens are available and
can reduce the risks of severe burns. Please keep children away from the replace
at all times.
®
C US
XG0810 Canadian Heating Products Inc. Langley, BC V4W 4A Montigo Del Ray Corp. Ferndale, WA 98248 081310-1
Warning:
Improper installation, adjustment, alteration, service or maintenance can 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.
L42DF-ST Shown
• Installer: Leave this manual
with the appliance.
• Consumer: Retain this
manual for future reference.
www.montigo.com
• 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 and service must be
performed by a qualied installer,
service agency or the gas supplier.
Warning: If the infor-
mation in these instructions is not
followed exactly, a re or explosion
may result causing property dam-
age, personal injury or death.
WHAT TO DO IF YOU SMELL GAS
L38DF-ST Series Gas Fireplace
L38DF-ST
LS38DF-ST
Installation Operation & Maintenance Manual
Check local codes and read all instructions prior to installation.
L38DF ST Manual

Page 2
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
▪ Installing a RHS8 Wall Mounted Heat Shield ......... 15
▪ Installing a RHS101 Wall Mounted Heat Shield ...... 15
Section 4: Wiring ................................................................... 16
▪ SIT - IPI gas control and pilot ............................... 16
▪ Honeywell gas control and pilot ........................... 16
▪ Installing HFK Fan Kit ......................................... 16
Section 5: Installing the Gas Line .......................................... 17
Section 5-1: Fuel Conversion ........................................ 17
Section 5-2: Gas Pressure ............................................ 17
Section 5-3: Gas Connection......................................... 17
Section 6: Finishing ............................................................... 18
▪ Finishing around the replace .................................. 18
▪ Installing the nailing ange extension ........................ 18
Section 7: Installing and Removing the Door ........................ 19
Section 8: Installing the Accessories ..................................... 20
▪ Installing the L38DF-ST Firestones ........................... 20
▪ Installing the L38DF-ST Articial River Rocks ............ 20
Section 9: Operation .......................................................21 - 23
▪ Start-up Sequence with Continuous Pilot .................. 21
▪ Start-up Sequence Honeywell Gas valve .................. 22
▪ Start-up Sequence SIT-IPI Gas valve ....................... 23
Maintenance ...................................................................24 - 25
▪ General ................................................................. 24
▪ Cleaning ................................................................ 24
▪ SIT Hi-Lo Burner Adjustment ................................... 24
▪ SIT Pilot Burner Adjustment .................................... 24
▪ Troubleshooting ...................................................... 25
SIT- Nova 820 Gas Control Valve ....................... 25
Honeywell Gas Control Valve ........................... 25
SIT- IPI Electronic Gas Control Valve ................. 25
▪ Parts List ............................................................... 25
Appendix
A. Termination Locations .......................................... 26
B. Warranty ............................................................ 27
C. State of Massachusetts. ...................................... 28
Safety Alert Key
Introduction ............................................................................... 3
Models............................................................................ 3
Installation
Before you Start ............................................................. 4
Installation Checklist ...................................................... 4
Section 1: Installation Overview and Product Dimensions ...... 5
Section 2: Framing the Fireplace ............................................. 6
Clearances ........................................................ 6
Section 3: The Direct Vent System ................................... 7 - 11
Section 3-1: Converting from Top Vent to Rear Vent .... 7
Section 3-2: Installing a Roof mounted Termination 8 - 9
▪ Section 3-2-1: Venting Layout ...................................... 8
▪ Roof mounted Terminations
Standard Top Vent (no elbows or offsets)............. 8
Top Vent (two elbows one offset) ......................... 8
Top Vent (multi-elbows and offsets) ..................... 8
Standard Roof Vent (one elbows no offsets) ....... 9
▪ Section 3-2-2: Venting Components ............................. 9
Section 3-3: Installing a Wall mounted Termination .... 10
▪ Standard PTO Installation .................................... 10
▪ Pre-installed MSR Frame .................................... 10
▪ Pre-installed BSR Frame ..................................... 10
▪ Installing MOSR Frame ....................................... 10
▪ Installing VSS Termination Shield ......................... 10
▪ Installing PTKOG Heat Guard .............................. 10
▪ Section 3-3-1: Venting Layout ............................ 11 - 12
▪ Top Vent, Wall mounted Graph, L38DF-ST ............ 11
▪ Top Vent, Wall mounted termination (one elbow) .... 11
▪ Top Vent, Wall mounted termination (multi elbow) ... 11
▪ Rear Vent, Wall mounted Termination Graph ......... 13
▪ Standard Rear Vent, (no elbows or offsets) ........... 13
▪ Rear Vent, Wall mounted termination (two elbows) . 13
▪ Section 3-3-2: Venting Components .............................. 14
▪ Section 3-3-3: Heat Shields ......................................... 15
Warning:
Read this manual before installing, operating or troubleshooting this appliance.
Please retain this owner's manual for future reference.
Table of Contents

Page 3
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
INTRODUCTION
Congratulations on your purchase of a Montigo Fireplace.
With over 30 years of experience, Montigo is committed to providing
you with a gas replace that is not only a beautiful addition to your
space, but that is also designed and manufactured to the highest
safety, reliability and engineering standards.
We strongly encourage you to read and carefully follow the
instructions laid out in this Installation, Operation and Maintenance
Manual and retain it for your future reference. Pay special attention
to all cautions, warnings, and notices throughout this manual
intended to ensure your safety.
This manual covers installation, operation and maintenance.
Lighting, operation and care of this replace can be easily
performed by the homeowner. All installation and service work
should be performed by a qualied or licensed installer, plumber
or gastter as certied by the state, province, region or governing
body where the replace is being installed.
Safety Alert Key:
• 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.
Introduction
Warranty and Installation Information: (See Appendix B)
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.
WARNING
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
NOTE: L(S)38DF-ST* Units are stainless steel construction
This installation, operation and maintenance manual is applicable
to the models described below. Refer to your rating plate to
verify included options. Throughout this manual instructions
are applicable to all models designated as L38DF-ST* unless
otherwise noted.
L38FSDN X 27,000 X X
L38FSDNE X 27,000 X X
L38FSDNI X 27,000 X X
L38FSDL X 27,000 X X
L38FSDLE X 27,000 X X
L38FSDLI X 27,000 X X
MODEL Natural Gas Liquid Propane Gas Rating (BTU hr) Linear Burner w/ Glass Accessories Standard Pilot Ignition Honeywell Hot Surface Ignition SIT Electronic Ignition

Page 4
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
WARNING!
When this appliance is installed directly on 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.
IMPORTANT MESSAGE: SAVE THESE INSTRUCTIONS
The L38DF-ST* Direct Vent replace must be installed
in accordance with these Instructions. Carefully read all the
Instructions in this manual rst. Consult the Local Gas Branch to
determine the need for a permit prior to starting the installation.
It is the responsibility of the installer to ensure this replace is
installed in compliance with the manufacturers instructions and
all applicable codes.
BEFORE YOU START:
INSTALLATION AND REPAIRS SHOULD BE DONE
BY AN AUTHORIZED SERVICE TECHNICIAN. THE
APPLIANCE SHOULD BE INSPECTED BEFORE USE
AND AT LEAST ANNUALLY BY A PROFESSIONAL
SERVICE TECHNICIAN. MORE FREQUENT CLEANING
MAY BE REQUIRED DUE TO EXCESSIVE LINT
FROM CARPETING, BEDDING MATERIAL, ETC. IT
IS IMPERATIVE THAT CONTROL COMPARTMENTS,
BURNERS AND CIRCULATING AIR PASSAGEWAYS
OF THE FIREPLACE ARE KEPT CLEAN.
CAUTION!
Due to its high operating temperatures, the appliance should
be located out of trafc & 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 ammable materials should not be
placed on or near the appliance.
Installation Checklist
Determine the desired install location of your replace.
See Section 1, Dimensions on Page 5, and refer to the Framing
Section 2 for details.
Select the location of your termination and resulting vent run.
Your selected termination location must be the highest point
in the Direct Vent installation.
Should it be impossible to meet the venting requirements laid
out in Section 3: Venting, please contact Montigo regarding the
use of a Montigo Power Vent.
Lay out the Vent run; calculating the required elbows and straight
runs of 4"/7" flex or rigid pipe.
Layout Electrical Requirements Refer to Section 4: Wiring, for
Details.
Refer to Section 5: Installing the Gas Line, for details on the
gas connection and access.
Refer to local codes and guidelines for installation requirements.
Installation and repairs should be done by a qualied
contractor and must conform to:
• Installations in Canada must conform to the current
CAN/CGA B-149.1 and .2 Gas Installation Code and local regulations.
• 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 .
• See Appendix C for installation within the State of
Massachusetts. This replace must comply with NFPA-54 Chapter
10.

Page 5
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Section 1: Installation Overview and Product Dimensions
Top View
Front View
Figure 1. Fireplace dimensions, (ALL Models, shown in Table on Page 3).
LH-Side View
Installation
Please review the Installation Checklist on Page 4 for general information on preparing for a successful installation of your replace.
The L38DF-ST* replace may be installed in any location that maintains proper clearances to air conditioning ducts, electrical wiring and plumb-
ing. Safety, as well as efciency of operation, should 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 path for Direct Vent installation.
The replace dimensions are shown below:
37 3/4”
7”
24”
36 3/8”
8”
5”
33 3/4”
5” 8”
24”
26 3/4”
5 1/2”
5 1/4”
18 3/4”
Openin
g
2
9 1/2”
1 1/4”
1”
35 1/4” Opening 1 1/4”1 1/4”
37 3/4”

Page 6
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Section 2: Framing
Installation
1). Frame in the enclosure for the unit with framing materials. The
framed opening for the assembled replace is 41" wide, x 40" high
x 23 3/4" deep, see Figure 2 .
NOTE: When constructing the framed opening, please ensure
there is access to install the gas line when the unit is installed.
See Figure 22.
Figure 2. Framing dimensions.
Clearances
When installing a shelf over the top of the replaces, the following
guidelines must be adhered to:
For Rear Vent applications, the minimum clearance is 3" from the rear of
the replace to a wall, or any combustible materials, and 10" clearance
from the top of the replace to the underside of any combutible shelf
materials.
For Top Vent applications, the minimum clearance is 3" from the rear of
the replace to a wall, or any combustible materials, and 17 1/2" to the
underside of any combutible shelf materials.
Figure 2a. Framing dimensions, (Back-framing)
Figure 4. Combustible Framing for shelves over the replace, Top
vent.
Figure 3. Combustible Framing for shelves over the replace, Rear
vent.
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 replace after
unit is in place. Use supplied hardware
to fasten to framing. Both sides Typi-
cal. Unit may not be exactly as shown.
Backframe Min. 37 3/4”
Figure 5. Non Combustible Framing with alcove above replace,
Right side. Combustible Framing above replace, Left side, see
gure 2. (Top Vent).
Non
Combustible
Header
7”
Floor
Alcove over
Fireplace Non
-
Combustible
Materials Only
34 1/2”
29 1/2”
door
opening
40”
7”
Combustible
Header
Min. 1”
Supplied
Header
10”
Top vent
N.G. & L.P
10”
Min.
Supplied shield
Combustible Shelf
N.G. & L.P
26 3/4
12” Max.
3” Min.
39 1/2” Min.
17 1/2”
Min.
PEL Short
90 elbow
Supplied shield
Combustible Shelf
N.G. & L.P
3” Min.
L38DF-ST 10" 17 1/2" 3" 1" 0" 4"
MODEL Top - Rear Vent * Top - Top Vent Back Sides Floor Mantel

Page 7
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
Section 3: Venting
Figure 7. Flue cover and collar removal, Top Vented replace.
Figure 8. Flue cover and collar installation, Rear Vented replace.
Section 3-1: CONVERTING TO REAR VENT
Use the following instructions to convert an L38DF-ST* for Rear Vent use:
1. Remove the Rear ue cover and gasket (5" and 8") on the ue
outlet, as shown in Figure 7.
2. Next, Remove the Top ue collar's (5" and 8") on the ue outlet,
as shown in Figure 7.
3. Install the (removed) Rear ue cover and gasket material, to the
Top vent outlet. Fasten the cover with included hardware, as
illustrated Figure 8.
4. Install the (5" and 8") collars to the rear vent outlet using the
included hardware, as illustrated Figure 8.
Montigo supplies a variety of direct venting and termination options.
The direct vent termination location MUST be selected such that
it is the highest point in the venting assembly. It should also be
selected such that it provides the shortest vent run possible. Should
it be impossible to ensure that the termination is the highest point
or to meet the venting guidelines laid out below please contact your
Montigo dealer to discuss power venting options.
NOTES FOR PLANNING VENTING:
Venting can originate from the unit through the top or
through the rear
Venting can terminate through the roof or through an
exterior wall.
 Refer to Appendix A - Termination Locations to ensure the
planned termination location is acceptable.
Once the termination location has been established, refer
to the appropriate section below for installation details
All replaces shipped from the factory are Top vent.
See Section 3-1 for converting the unit from top vent to rear vent.
Flue Collar
8” Outer
Flue Collar
5” Inner Flue
Cover Plate
Outer Flue
r Plate
5” Inner Flue
Cover Plate
8” Outer Flue
Cover Plate
8” Outer
Flue Collar
5” Inner
Flue Collar

Page 8
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
Section 3-2: INSTALLING A ROOF MOUNTED DIRECT VENT
TERMINATION (PVTK-1)
This section applies to installations where the direct vent termi-
nation will be roof mounted.
Section 3-2-1: VENTING LAYOUT
Selection of components and details of venting lay out should
adhere to the following guidelines:
The maximum termination point is 32’ above the replace (NOTE:
if the maximum termination height is used, the ame pattern
may be affected).
The Vertical termination must be a minimum 2’ higher than where
the termination exits the roong materials, (asphault shingles,
cedar shakes, etc). This distance should be measured from the
high side of the roof slope where the ue ashing intersects the
roong materials. (see Figures 11 to 11c *).
Termination location must be a minimum 6’ from a mechanical
air inlet.
Termination location must be a minimum 18” from a parapet wall.
A maximum of two offsets (each offset is made up of 2-90°
bends) may be made.
Install a restop at any location where venting passes through
combustible materials and construction.
Utilize support straps, or support plates, and rings (as required)
to meet acceptable building practices.
Install all roof ashing and storm collars as shown.
Figure 11. Top vent, Roof mounted termination with no offset in
vent run.
Figure 11a. Top vent, Roof mounted with 1 offset (1 offset= two 90°
bends).
Figure 11b. Top vent, Roof mounted with 2 offsets (1 offset= two 90°
bends).
Roof mounted Terminations
The following details are some possible congurations for Roof
mounted terminations. See below.
PVTK1 Termination
PVTK1 Termination
PVTK1 Termination

Page 9
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
Figure 11c. Rear vent, Roof mounted venting (1 = 90° bend).
Connection and installation of the vent components should
adhere to the following guidelines:
Use any combination of rigid and Flex pipe as required.
Flex sections may be stretched up to 50% of their total length
(e.g. a 24” section maybe stretched to 36”).
Connect all vent sections using a minimum of three sheet
metal screws on the outer pipe ue.
Ensure the pipe ends male to female slide in a minimum of
1 1/2” of overlap.
Ensure all runs are supported with a minimum of 3 supports
per 10’ of venting.
When hanging/ supporting venting, ensure that 1” clearance
is maintained on sides and bottom of vent runs and 2” above
horizontal vent runs to any combustible material.
Ensure when cutting sections of rigid pipe to maintain integrity
of internal supports.
Place the springs, supplied with the pipe kit, between the
outer and inner pipes to keep the pipes separate and avoid
any possible hot spots.
Montigo recommends the use of a ex section for the nal pipe
connected directly to the replace offering greater exibility of
installation and absorption of movement.
When penetrating a combustible ceiling, a ceiling restop
must be used.
Montigo recommends that all exterior corners and joints be
sealed with exterior caulking however we encourage you to
consult your Building Envelope Engineer or Waterproong
Consultant for further recommendations.
PEXT
Solid Sectio
n
PVTK1 Termination
12” Max.
A - Termination PVTK-1
B - Flex Sections PFL - 1 (12" f/f Section)
PFL - 18 (18" f/f Section)
PFL - 2 (24" f/f Section)
PFL - 3 (36" f/f Section)
PFL - 4 (48" f/f Section)
PFL - 6 (72" f/f Section)
C - Rigid Sections PXT - 5 (5" f/f Section)
PXT - 10 (10" f/f Section)
PEXT - 1 (12" f/f Section)
PXT - 20 (20" f/f Section)
PEXT - 2 (24" m/f Section)
PEXT - 3 (36" m/f Section)
PEXT - 4 (48" m/f Section)
PEXT - 6 (72" m/f Section)
D - Support Ring &
Plate
PSPXT-8
E - Firestop PS-8
F - Roof Flashing PRF-7 (1/12 - 7/12 pt.)
PRF-12 (7/12 - 12/12 pt.)
Section 3-2-2: VENTING COMPONENTS
Select from the following components and associated Montigo
part numbers for installation of a Roof Mounted Termination.
Use only Montigo Vent Components. Use of non-Montigo parts
will void the warranty and may impede operation of the replace.

Page 10
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
1
12”
2”
12”
12”
Installation
Section 3-3: INSTALLING A WALL MOUNTED DIRECT VENT
TERMINATION
This section applies to installations where the direct vent termi-
nation will be wall mounted.
1). Installation of Termination with built in frame
A Termination with a Built-In Frame is installed during framing of a structure.
1. Frame the termination opening to 11" x 11".
2. Install exterior sheathing to the structure framing.
3. Fasten the termination to the sheathing using a minimum of 4 screws.
MSR Frame
PTO-4 (5"/8")
Termination
PTO-4F (5"/8")
Termination
Figure 13. Installing a PTO-F termination.
Figure 13a. Installing a PTO termination with the MSR frame.
Figure 14. Installing the VSS Vinyl Shield.
5). Installation of a termination shield for Vinyl Siding
The VSS Termination shield is installed when the exterior of a structure
is clad with Vinyl siding. It is placed directly above, and on-center with
the termination.
2). Installation of termination frame at time of framing
Terminations with a MSR frame allow the installation of the frame prior
to installation of the termination.
1. Frame the termination opening to 12" x 12".
2. Secure the MSR Frame to the exterior sheathing of the structure.
3. Fasten the termination to the MSR Frame using a minimum of 4 screws.
Figure 13c. Installing a PTO termination with the BSR frame.
3). Installation of termination frame at time of framing in
Masonry
Terminations with a BSR frame allow the installation of the frame in
masonry prior to the installation of the termination
1. Frame the BSR opening to 12" x 12".
2. Secure the BSR Frame to the exterior sheathing of the structure.
1. Frame the MOSR opening to 12" x 12".
2. Fasten the MOSR frame to the interior side of the studs, concrete,
or nished wall construction using a minimum of 4 screws.
3. Insert the termination into the MOSR frame as shown here, (from
the inside) and attach to the MOSR by installing a min. quantity of
4 bolts into the threaded nuts on the MOSR Frame.
4). Installation of termination from inside structure
A Termination with a MOSR Frame is installed from the inside of the
structure. These are commonly used in high-rise construction.
MOSR Frame
PTO-4 (5"/8")
Termination
Figure 13b. Installing a PTO termination with the MOSR frame.
BSR Frame
PTKOG (5"/8")
Installing Heat Guards over Terminations is recommended
in installations where the termination is located within 7' feet above
grade, or above a pedestrian walkway, and may be Required by code
in Public areas.
1. Ensure that the two long mounting brackets are facing the bottom
of the termination. (See inset). This will provide more heat protection
at the top of the termination, where temperatures are highest.
2. Attach to the faceplate of the termination using four sheet metal
screws.
Figure 13c. Installing a PTO termination heat guard.
1
1”
11”
Framing
Exterior
Sheathing
Fastening Hardware,
minimum 4-screws
Framing
Exterior
Sheathing
Fastening Hardware,
minimum 4-screws
PTO-4 (5"/8")
Termination
Framing
Exterior
Sheathing
Fastening Hardware,
minimum 4-screws
12”
12”
Fastening Hardware,
minimum 4-screws
Framing, con-
crete or other
materials
Exterior Sheath-
ing, concrete or
other materials
Exterior Vinyl
siding
PTO-4 (5"/8")
Termination
VSS Vinyl shield

Page 11
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
A
C
B
36” NG & LP
42”
Installation
The Venting Graph: L38DF-ST*
Measure the vertical height from the replace hearth to the centre of the
termination and the horizontal run from the replace ue collar to the wall
ange of the termination. Plot on the Venting Graph Figure 14 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 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 60" 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 14. L38DF-ST* Top Vent Venting Graph for wall mounted
terminations.
If your installation does not fall
within the venting graph para-
meters, please contact Montigo
for Power Venting options.
Figure 16. Top Vented, wall mounted installation with1 elbow (1 one
90° bend). The vent run must comply with Venting Graph
for Top vent, wall mounted terminations, Figure 14.
Figure 16a. Top Vented, wall mounted Multi-elbow installation. See
Venting Graph for Top vent, wall mounted terminations,
Figure 14.
Section 3-3-1: VENTING LAYOUT: Wall mounted termination.
Selection of components and details of venting layout should
adhere to the following guidelines:
Vent terminations must not be recessed in walls or siding.
All through-the–wall terminations within 3’ of the replace must
have a Montigo Heat Shield (RHS101) installed. See Section
3-3-3.
All through-the-wall terminations beyond 3' of the replace must
have a Montigo Heat Shield (RHS8) installed. See Section 3-3-3.
Once the proposed venting layout has been determined refer to
Figure 14 to ensure the layout is acceptable.
Notes Wall Mounted Terminations: Top Vent
All measurements for vertical or horizontal runs are measured
from center of the vent pipe.
Venting runs must fall within the limits set by the venting graph,
see Figure 14.
Wall mounted Terminations
The following details are some possible congurations for Wall
mounted terminations. See below.
Unacceptable vent run
within shaded area.
Acceptable vent run
within non-shaded area.
Solid Section
Flex Section
Hearth
30”min
15’foot Max.
RHS8 Heat
Shield
Termination
Exterior
Wall
8’foot
Max.
RHS8
36
”
max.
42
Min.
WARNING:
An inspection of the explosion relief appers and door
MUST be made prior to lighting the replace. A faulty
seal on the door gasket and/or explosion ports will
result in products of combustion leaking into the living
space and may result in carbon monoxide poisoning.

Page 12
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
A
B
C
42”
42”
26 3/4”
12”
Figure 17. Rear Vent Venting Graph for wall mounted terminations.
Figure 17b. Rear Vented, wall mounted Multi-elbow termination
installation. Installation for L38DF*-ST must have a minimum
vertical rise of 42".The vent run must comply with the Venting
Graph for Rear vent, wall mounted terminations, Figure
17.
Figure 17a. Straight run, Rear Vented, wall mounted termination for
L38DF-ST*, Figure 17.
Installation
If your installation does not fall
within the venting graph para-
meters, please contact Montigo
for Power Venting options.
Notes Wall Mounted Terminations: Rear Vent
All dimension lengths for vertical or horizontal runs are measured
from center of the vent pipe.
Venting runs must fall within the limits set by the venting graphs,
see Figure 17.
Fireplace must be converted to Rear Vent conguration prior to
running vent, see Figure 7 and 8.
The Venting Graph
Measure the vertical height from the replace hearth to the centre of the
termination and the horizontal run from the replace ue collar to the wall
ange of the termination. Plot on the Venting Graph Figure 17 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 120" and the horizontal
run to the wall ange of the vent termination is 138", this would be
an acceptable installation.
Example B: (Uncceptable 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
would NOT 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.
Unacceptable vent run
within shaded area.
Acceptable vent run
within non-shaded area.
30” Max.
42” Min.
12”
Max.
Flex or Rigid
Section
15 1/4”
Min.
26 3/4”
Hearth
26 3/4”
PXT Extension
RHS101 Heat
Shield
Termination
Hearth Exterior
Wall
NOTE:
12” MAX. horizontal
run with no vertical lift.
12” MAX.
WARNING:
An inspection of the explosion relief appers and door
MUST be made prior to lighting the replace. A faulty
seal on the door gasket and/or explosion ports will
result in products of combustion leaking into the living
space and may result in carbon monoxide poisoning.

Page 13
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Connection and installation of the vent components should
adhere to the following guidelines:
When penetrating a combustible ceiling, a ceiling restop
must be used.
Montigo recommends that all exterior corners and joints be
sealed with exterior caulking however we encourage you to
consult your Building Envelope Engineer or Waterproong
Consultant for further recommendations.
Installation
Section 3-3-2: VENTING COMPONENTS
The following components and associated Montigo part num-
bers are available for installation of a Wall Mounted Termination.
Use only Montigo Vent Components. Use of non-Montigo parts
will void the warranty and may impede operation of the replace.
Use any combination of rigid and Flex pipe as required.
Flex sections may be stretched up to 50% of their total length
(e.g. a 24” section maybe stretched to 36”).
Connect all vent sections using a minimum of three sheet metal
screws on the outer pipe ue..
Ensure the pipe ends male to female slide in a minimum of 1
1/2” of overlap.
Ensure all runs are supported with a minimum of 3 supports
per 10’ of venting.
When hanging/ supporting venting, ensure that 1” clearance
is maintained on sides and bottom of vent runs and 2” above
horizontal vent runs to any combustible material.
Ensure when cutting sections of rigid pipe to maintain integrity
of internal supports.
Place the springs, supplied with the pipe kit, between the outer
and inner pipes to keep the pipes separate and avoid any
possible hot spots.
Montigo recommends the use of a ex section for the nal pipe
connected directly to the replace offering greater exibility of
installation and absorption of movement.
A - Termination PTO-4 (3" Length)
PTO-4F (3" Length)
B - Frame Kits MSR (Stucco Frame)
MOSR (Stucco Frame)
BSR-4 (4" Brick Frame)
BSR-6 (6" Brick Frame)
C - Flex Sections PFL - 1 (12" f/f Section)
PFL - 18 (18" f/f Section)
PFL - 2 (24" f/f Section)
PFL - 3 (36" f/f Section)
PFL - 4 (48" f/f Section)
PFL - 6 (72" f/f Section)
D - Rigid Sections PXT - 5 (5" f/f Section)
PXT - 10 (10" f/f Section)
PEXT - 1 (12" f/f Section)
PXT - 20 (20" f/f Section)
PEXT - 2 (24" m/f Section)
PEXT - 3 (36" m/f Section)
PEXT - 4 (48" m/f Section)
PEXT - 6 (72" m/f Section)
E - Elbows PEL-90MM (m/m 90º Elbow)
PEL-90FF ( f/f 90º Elbow)
PEL-90FM ( f/m 90º Elbow)
PEL-45FM ( f/m 45º Elbow)

Page 14
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
Section 3-3-3: Heat Shields
Installing a Wall Mounted RHS8 Heat shield
The RHS8 Heat shield CANNOT be used when the Termination is WITHIN
(36" Min. horizontal and 46" Min. vertical) from the replace, or directly
off the rear of the replace, as shown gure 19a. The RHS101 Heat
Shield (Figure 19c and 19d) MUST be used within the noted dimensions.
To install the RHS8, frame an opening in combustible construction,
Figure 19 below. Slide the Heat shield in place over the vent pipe
which attaches to the replace. After the replace and vent pipe has
been installed, clearances should match the dimensions in Figure 19.
Figure 19. RHS8 Installation. (Install by sliding over vent pipe where it
passes through the combustible contruction).
Figure 19c. RHS101 Installation. (Install by sliding Outer Section over vent
pipe where it passes through the combustible construction.
Figure 19d. Heat Shield. After sliding the outer section in place.
Termination
Drywall / sheetrock
RHS101 Heat Shield, inner Section
RHS101 Heat Shield
Outer Section
Fireplace
Installing a Wall Mounted RHS101 Heat shield.
The RHS101 Heat shield MUST be used where the RHS8 Termination
(Figure 19 and 19a) CANNOT be used. Use the RHS101 where any
of the dimensions are within the parameters shown, gure 19a.
To install the RHS101, Slide the Inner Section over the vent pipe that
will connect to the replace. Then fasten the vent pipe to the back of the
replace with a minimum of three sheet metal screws. (Note: ensure you
maintain the Max. 12" replace clearance). From the outside slide the
RHS101 outer section on see Figure 19c. To complete the installation
fasten the Heat Shield Outer Section & Termination frame to the structure
Figure 19d.
Figure 19a. RHS8 Installation. (Minimum requirements).
RHS8 Heat Shield
1” Min. Both sides Typical
2” Min.
1” Min.
Combustible Framing
12” max
Combustible
framing
Termination
Drywall / sheetrock
RHS101 Heat Shield, inner Section
RHS101 Heat Shield
Outer Section
Fireplace
Vent pipe, from fireplace
RHS8 Heat
Shield
36” Min
46” Min.
Termination

Page 15
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
Section 4: Wiring
Installation
Figure 21. Wiring for the SIT IPI Wiring Schematic
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 21b. Wiring schematic for optional fans.
G
L2-WH
L1-BLK
p g
Quick Connect
lu to motor
5/1/60 Supply
G L1 L2
Wiring Schematic for Honeywell gas control & Pilot
Figure 21a. Wiring for the L38DF-ST-E 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
Models Included
L38FSDNI
L38FSDLI
Models Included
L38FSDNE
L38FSDLE

Page 16
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
Section 5: Installing the Gas line
Installation
Section 5-1: FUEL CONVERSION
Verify that your replace is compatible with your available gas
type. (Natural Gas or Propane shown by "N" or "L" in your
model number
If gas type is not compatible, contact your local Montigo
representative to purchase a conversion kit.
Conversion kits must be installed by a qualied service technician.
Section 5-2: GAS PRESSURE
Optimum appliance performance requires proper input pressures.
Gas line sizing requirements will be determined in ANSI Z221.3
National Fuel Gas Code in the USA and CAN/CGA B149 in
Canada.
Pressure requirements are:
Gas Pressure Natural Gas Propane
Minimum inlet pressure 5.5in. w.c. 11in. w.c.
Manifold pressure 3.5in. w.c. 10in. w.c.
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 ame of any kind to test for leaks.
WARNING!
When pressure testing the replace, Gas line, and input system
follow the appropriate local codes or your area. DO NOT
connect the replace to pressures in excess of 1/2lb. This will
damage the gas control valve.
The manifold outlet pressure is set from the factory to the
appropriate pressure but should be veried.
To check pressures, control valves have a provision to remove
a 1/8” N.PT. plug to be tted with a hose barb.
Montigo requires a service shut off valve be located in an
accessible location to isolate the gas supply.
Only install gas shut-off valves approved for use by the state,
province, or other governing body in which the replace is being
installed.
Section 5-3: GAS CONNECTION
See Figure 22 below for location of gas line access.
Flexible gas connectors must not exceed 3 feet in length, unless
allowable within local regulations.
Connect incoming gas line to the 1/2"or 3/8" gas inlet port.
Purge all air out of gas line.
Check appliance connection, valve and valve train under normal
operating pressure with a commercially available leak check
solution.
DO NOT USE A FLAME OF ANY KIND TO TEST FOR LEAKS.
Figure 22. Gas line access.
7”
1 3/4”
2 3/8”
1 3/4”

Page 17
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
Section 6: Finishing
Installation
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.
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.
radio, and other electronic components.
DO NOT OPERATE THIS FIREPLACE WITHOUT THE GLASS
DOOR OR WITH A BROKEN GLASS DOOR.
CAUTION!
WARNING!
When covering the upper metal portion of the replace, up to 4"
(as shown, Fig.24) 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.
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.
Fireplace Facing
When sizing the nish material for your replace, it is important to remem-
ber the following: THE OPENING MUST NOT BE OBSTRUCTED 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.
Figure 24a. Installing the Nailing Flange Extension.
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 2),
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.
Figure 24. Combustible mantels and facings, (Both Sides Typical).
Top of fireplace
Non-Combustible
Combustible Facing
Material
Facing Material
Combustible
Construction allowed
in shaded area
Steel Stud construction allowable
within the grey-out area
Horizontal Run (in.)
Vertical Height (in.)

Page 18
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
Section 7: Installing & Removing the Door
Installation
Removing the door:
The L38DF-ST* doors are removed in a few simple steps. Follow these
below to remove the Horizontal access panel, unlatch the door buckles
and, remove the door. Replace in reverse order.
Remove the Horizontal Access Panel:
Figure 26a. Locate the door buckles. (Both Sides Typical)
Door Latch Hook
Door Latch Slot
Hand-hold
Release the Door Buckles
Figure 26. Removing and installing the the Horizontal Acess Panel
Locate the Door Buckles:
Figure 26b. 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 26c.
Step 2:
Step 3:
Step 1:
Remove the Horizontal cover
by placing ngers in both nger
holes, then pushing 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
the door into position and follow the previous steps shown in reverse order.
lower and rest the door frame in place and fasten the buckles. See
gures 28a and 28b.
Installing the Door:
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 26d.
Figure 26e.
Figure 26f.
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
Figures 26g. Place the Door aside in a safe place while maintenance
and / or cleaning is being performed.
Figure 26g. Removing and installing the glass doors. (Both Sides
Typical)
Removing the Door:

Page 19
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
Section 8: Installing the Accessories
Installing the Firestones:
N.G. (Natural Gas) Fireplaces
The L38DF-ST-I is supplied with restones. 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 restones randomly across
the pan and the burners as described in Figure 28 to 28b.
Note: (N.G.) Natural Gas models, Only cover the Optional
burner covers with one layer of designer restones.
Figure 28. Installation of the Optional burner covers , (Place the cov-
ers end to end; do not overlap).
Figure 28a. Installation of the restones. (Ensure ONLY one layer of
restones cover the burner and pilot covers).
Figure 28b. Spreading the restones evenly .
Installing the Firestones:
L.P. (Propane) Fireplaces
Propane L38DF-ST-I Fireplaces, has the option of installing the
optional cultured rocks or restones. As described below, CAUTION,
the restones or cultured rocks cannot cover the burners. Doing
so produces an undesireable / uneven ame pattern, and eventual
sooting. Install as shown, Figure 28d to 28e.
Figure 28c. Completed restone installation.
Figure 28d. Completed restone installation. (Note: DO NOT place
ANY restones on top of the burners).
Figure 28e. Operating Propane gas replace with restones sur-
rounding burner tray.
Optional River Rocks
The L38DF-ST* 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
CAUTION!
When L.P. (Propane) is used DO NOT COVER THE
BURNERS with restones or river rocks.
Note: (LP Gas) CAUTION: Ensure the optional river rocks
or designer restones do not cover the Burners.
CAUTION!
If the restones are not placed properly (ONE LAYER ONLY),
ON N.G. burners excessive sooting will result.
The restones will get very hot while the replace is in opera-
tion, and should not be handled until cool.

Page 20
L38DF-ST* Indoor Gas Fireplace
Part No. XG0810 - 081310-1
Installation
phone. Follow the gas supplier's instructions.
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 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 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 oor because some gas is
heavier than air and will settle on the oor.
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
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.
with Continuous Pilot
with American Flame Electronic Ignition
For Your Safety - READ BEFORE LIGHTING:
WARNING! If you do not follow these instructions exactly, a re or explosion may
result causing property damage, personal injury or loss of life.
Lighting Instructions:
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 ve (5) minutes to clear out any gas. Smell for gas,
including near the oor. 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. Replace the lower Horizontal access
panel.
10. Turn on remote switch to ignite re.
NOTE: Gas control knob cannot be turned from "PILOT" to "OFF"
unless knob is pushed in slightly. Do not force.
Installation
Section 9: Start-up Sequence
Operation Models Included
L38FSDN
L38FSDL