Montigo L38DF-ST series Instruction Manual

L38DF-ST Indoor
L-Series
Residential
Fireplace
®
C US
Read and understand this manual. Improper installation, adjustment, alteration,
service or maintenance can cause serious injury, property damage or even death.
For assistance or additional information consult a qualified installer, service
agency or the gas supplier.
DANGER
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. Please keep children away
from the fireplace at all times.
CAUTION
Do not store or use gasoline or any other flammable vapors and liquids in the vicinity of
this or any other gas burning appliance. A fire or explosion my occur causing serious
injury, property damage or even death.
WARNING
Installer: Leave this manual with the appliance. Do not remove.
Consumer: Retain this manual for maintenance and future reference. Do not Discard.
NOTICE
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 fire department.
DANGER
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
Low temperature
Strong magnetic field
Optical radiation
Non ionizing
radiation
Radiation
Hazardous to the
Environment
Danger of harming
your hands
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
Low temperature
Strong magnetic field
Optical radiation
Non ionizing
radiation
Radiation
Hazardous to the
Environment
Danger of harming
your hands
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
Low temperature
Strong magnetic field
Optical radiation
Non ionizing
radiation
Radiation
Hazardous to the
Environment
Danger of harming
your hands
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
XG0810 070714
Canadian Heating Products Inc. Langley, BC V4W 4A1 | Montigo Del Ray Corp. Ferndale, WA 98248
Installation & Maintenance Manual

Page 2
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
▪ Section 3-2-2: Venting Components ....................15 - 16
▪ Installing a RHS8 Wall Mounted Heat Shield ......... 16
▪ Installing a RHS101 Wall Mounted Heat Shield ...... 16
Section 4: Wiring ............................................................17 - 18
▪ SIT Proame gas control and pilot ....................... 17
▪ SIT Nova 820 gas control and pilot....................... 17
▪ Installing On/Off Wall Switch ............................... 18
▪ Installing wiring for optional fan kit ....................... 18
Section 5: Installing the Gas Line .......................................... 19
Section 5-1: Fuel Conversion ........................................ 19
Section 5-2: Gas Pressure ............................................ 19
Section 5-3: Gas Connection......................................... 19
Section 6: Finishing ............................................................... 20
▪ Finishing around the replace .................................. 20
▪ Mantels and Surrounds ........................................... 20
Section 7: Installing and Removing the Door ........................ 21
Section 8: Installing the Accessories ..................................... 22
▪ Installing the Firestones .......................................... 22
▪ Installing optional cultured rocks .............................. 22
Section 9: Operation .......................................................23 - 24
▪ Start-up Sequence with Continuous Pilot .................. 23
▪ Start-up Sequence with Continuous Pilot .................. 24
Maintenance ...................................................................25 - 27
▪ General ................................................................. 25
▪ Cleaning ................................................................ 25
▪ SIT Hi-Lo Burner Adjustment ................................... 25
▪ SIT Pilot Burner Adjustment .................................... 25
▪ Troubleshooting ...................................................... 26
SIT- Nova 820 Gas Control Valve ....................... 26
IPI System Gas Control Valve .......................... 26
▪ Parts List ............................................................... 27
Appendix
A. Termination Locations .......................................... 28
B. Warranty ............................................................ 29
C. State of Massachusetts. ...................................... 30
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 - 7
Clearances ........................................................ 7
Installing supplied metal header........................ 7
Installing nailing ange extension ..................... 7
Section 3: The Direct Vent System ...................................8 - 16
Notes for planning venting ............................................... 8
Section 3-1: Converting from Top to Side vent ............... 8
Section 3-2: Installing a Roof mounted Termination 9 - 10
▪ Section 3-2-1: Venting Layout ...............................9 - 10
▪ Roof mounted Terminations
Standard Top Vent (no elbows or offsets)............. 9
Top Vent (two elbows one offset) ......................... 9
Top Vent (multi-elbows and offsets) ................... 10
Section 3-3: Installing a Wall mounted Termination .... 11
▪ Standard PTO Installation .................................... 11
▪ Pre-installed MSR Frame .................................... 11
▪ Pre-installed BSR Frame ..................................... 11
▪ Installing MOSR Frame ....................................... 11
▪ Installing VSS Termination Shield ......................... 11
▪ Installing PTKOG Heat Guard .............................. 11
▪ Section 3-3-1: Venting Layout ............................12 - 14
▪ Top Vent, Wall mounted Graph ............................. 12
▪ Top Vent, Wall mounted termination (one elbow) .... 12
▪ Top Vent, Wall mounted termination (multi elbow) ... 12
▪ Top Vent, Wall mounted termination
(Retracted multi elbow) ............................................ 13
▪ Side Vent, Wall mounted Graph ............................ 14
▪ Side Vent, Wall mounted termination (straight wall) 14
▪ Top Vent, Wall mounted termination (multi elbow) ... 14
Table of Contents

Page 3
L38DF-ST* Indoor Gas Fireplace
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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.
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.
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.
L38DF-STN X 27,000 X X
L38DF-STL X 27,000 X X
L38DF-STN-F X 27,000 X X
L38FDF-STL-F X 27,000 X X
MODEL Natural Gas Liquid Propane Gas Rating (BTU hr) Linear Burner w/ Glass Accessories Standard Pilot Ignition SIT Electronic Ignition
Indicates a hazardous situation which, if not
avoided, WILL result in death or serious
injury or property damage.
Indicates a hazardous situation which, if not
avoided, COULD result in death or serious
injury or property damage.
Indicates a hazardous situation which, if not
avoided, WILL result in minor or moderate
injury.
Addresses practices that are important, but
not related to personal injury
DANGER WARNING
CAUTION NOTICE
Safety Alert Key
Introduction
WARNING
Hot glass will cause
burns. Do not touch
glass until unit is cooled.
Never allow children to
touch glass.
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
Low temperature
Strong magnetic field
Optical radiation
Non ionizing
radiation
Radiation
Hazardous to the
Environment
Danger of harming
your hands

Page 4
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
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 your local Montigo
representative regarding the use of a Montigo Power Vent.
Lay out the Vent run; calculating the required elbows and straight
runs of 5"/8" 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 local codes or in the
absence of local codes to the current version of Natural Gas and
Propane Installation Code, CSA B149. Electrical Installations must
conform to the local codes or, in the absence of local codes, to the
current version of Canadian Electrical Code, CSA C22.1.1
• Installations in the USA must conform to the local codes or in the
absence of local codes to the current version of National Fuel Gas
Code, ANSI Z223.1/NFPA 54. Electrical Installations must conform to
the local codes or, in the absence of local codes, to the current ver-
sion of the National Electrical Code, ANSI/NFPA 70. See Appendix
C for installation within the State of Massachusetts.
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
Young children should be carefully supervised when they are
in the same room as the applicance. Toddlers, young children
and others may be susceptible to accidental contact burns. A
physical barrier is recommended if there are at risk individuals
in the house. To restrict access to a fireplace or stove, install
an adjustable safety gate to keep toddles, young children and
other at risk individuals out of the room and away from hot
surfaces.
CAUTION
Due to high operating temperatures, this 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.
CAUTION
When this appliance is installed directly on any combustible material other than wood
flooring, it must be installed on a metal or wood panel extending the full width and
depth of the appliance or a fire will occur causing serious injury, property damage or
even death.
DANGER
Installation and repairs should be done by an authorized gas fireplace service technician.
The appliance should be inspected before use and at least annually by a professional. 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.
NOTICE

Page 5
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Figure 1. Fireplace dimensions. (Tolerance ± ⅛").
Installation
Section 1: Installation Overview and Product Dimensions
Please review the Installation Checklist on Page 4 for general infor-
mation 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 plumbing. Safety, as well as efciency of operation, should be
considered when selecting the replace location. 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”
35 1/4”
18”
6 1/4”
5 1/4”
33 3/4”
Front View
Top View
24”
33 3/4”
29 1/2” 5” 8”
Side View
26 3/4”
39 1/4”
37 3/4”
36 3/8”
24” 5”
8”
C
L
7”

Page 6
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Section 2: Framing
Figure 2. Framing dimensions. Both walls typical.
Figure 3. Securing the replace to the framing cleats,
both walls typical.
Figure 5. Non Combustible Framing with alcove above replace, side
view shown.
Installation
Back-framing the unit
1). Slide the replace into the cavity.
2). Tack four studs in place, shown in Figure 2 and 3 as dashed lines.
3). Secure the replace in position by nailing into these cleats.
Non
Combustible
Header
7”
Floor
Alcove over
Fireplace Non
-
Combustible
Materials Only
33 1/4”
door
opening
39”
C
ombustible
Header
Min. 1”
10”
Top vent
N.G. & L.P
84”
Min.
Ceiling
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 19.
Figure 4a. Framing for shelves over the fireplace, Top Vent
(Combustible materials).
Figure 4. Framing for shelves over the fireplace, Side Vent
(Combustible materials).
41”
40”
41”
23 3/4”
40”
Cumbustible Shelf
Elbow
17 1/2”
Combustible
Header
Header
N.G. & L.P.
Supplied
Non combustible
Combustible Shelf
10”
Non combustible
Header
Combustible
Header
N.G. & L.P
Supplied

Page 7
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Installation
When installing a shelf over the top of the replace, the following
guidelines must be adhered to:
For Side Vent applications, the minimum clearance is 10" from the
top of the replace to the underside of any combustible shelf.
For Top Vent applications, the minimum clearance is 17½" from the
top of the replace to the underside of any combustible shelf.
MODEL Top - Top vent † Top - Side vent †
Sides Floor Mantel
L38DF-ST* 17½" 10" 1" 0" 4"
† NOTE: Clearance from top of replace to a combustible ceiling
within the replace enclosure.
Clearances
1” clearance is maintained on sides and bottom of vent runs and 2”
above horizontal vent runs to any combustible material.
Installing the Nailing Flange Extension
Once the replace is placed into the rough framed opening, the
supplied Nailing Flange Extension (Part No. H38074) must be fasten
securely into place, with nails or wood screws. as shown in Figure 7.
Installing the supplied non combustible header
Included with the L38DF-ST* gas fireplace are two metal headers
made of galvanized steel. The metal headers must be installed after
the fireplace has been back framed in place. Install metal headers at
34 1/2" from the base of the unit, as shown in figure 6.
40”
34 1/2”
Figure 6. Installing the supplied metal headers, both sides typical.
Figure 7. Installing the Nailing Flange Extension.
Note: The nailing ange extension can be substituted with a piece
of NON-Combustible material of the same size and thermal char-
acteristics, ie: cement board or equivalent. This is recommended in
applications where the facing materials will not adhere to the metal
nailing ange.
6"
Supplied
Non-Combustible
Header

Page 8
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Section 3: Venting
Figure 8. Flue cover and collar removal, Top Vented replace.
Figure 8a. Flue cover and collar installation, Side Vented replace.
Section 3-1: CONVERTING TO SIDE VENT
Use the following instructions to convert an L38DF-ST* for Rear Vent use:
1. Remove the Side ue cover and gasket (5" and 8") on the ue
outlet, as shown in Figure 8.
2. Next, Remove the Top ue collar's (5" and 8") on the ue outlet,
as shown in Figure 8.
3. Install the (removed) Side ue cover and gasket material, to the
Top vent outlet. Fasten the cover with included hardware, as
illustrated Figure 8a.
4. Install the (5" and 8") collars to the Side vent outlet using the
included hardware, as illustrated Figure 8a.
Flue Collar
8” Outer
Flue Collar
5” Inner Flue
Cover Plate
Outer Flue
5” Inner Flue
Cover Plate
8” Outer Flue
Cover Plate
8” Outer
Flue Collar
5” Inner
Flue Collar
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
should it be impossible 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 side.
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.
Installation
Cover Plate

Page 9
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Installation
Figure 9. Top vent, Roof mounted termination with no offset in vent
run.
Roof mounted Terminations
The following details are some possible congurations for Roof
mounted terminations.
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,
(asphalt 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
9 - 9c).
For a detailed diagram of allowed termination locations, see
Appendix A.
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.
Firestops must be installed as required by National & local
codes.
Ensure all horizontal runs are supported with a minimum of 3
supports per 10’ of venting.
Install all roof ashing and storm collars as shown.
PVTK1 Termination
PEXT
PEXT-10
Adaptor
Flue
Collar
Figure 9a. Top vent, Roof mounted with 1 offset (1 offset= two 90°
bends).
Figure 9b. Top vent, Roof mounted with 2 offsets (1 offset= two 90°
bends).
PVTK1 Termination
PVTK1 Termination

Page 10
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Installation
Figure 9c. Side vent, Roof mounted venting (1 = 90° bend).
PEXT
Solid Sectio
n
PVTK1 Termination
12” Max.

Page 11
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Installation
1
12”
2”
12”
12”
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.
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 10. Installing a PTO4-F termination.
Figure 10a. Installing a PTO termination with the MSR frame.
Figure 10d. Installing the VSS Vinyl Shield.
Installation of a termination shield for Vinyl Siding
The VSS Termination shield is installed when the exterior of a struc-
ture is clad with Vinyl siding. It is placed directly above, and on-center
with the termination.
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 10b. Installing a PTO termination with the BSR frame.
1. Frame the MOSR opening to 12" x 12".
2. Fasten the MOSR frame to the interior side of the studs, con-
crete, 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.
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.
3. Fasten the termination to the BSR Frame using a minimum of 4 screws.
BSR Frame
PTKOG (5"/8")
Installing Heat Guards over Terminations is recommended in installa-
tions 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 bot-
tom 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 11. 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
Exterior Vinyl
siding
PTO-4 (5"/8")
Termination
VSS Vinyl shield
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 10c. Installing a PTO termination with MOSR frame.
12”
12”
Fastening Hardware,
minimum 4-screws
Framing,
concrete or
other
materials
Exterior
Sheathing,
concrete or
other materials

Page 12
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
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 12 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 96" and the horizontal
run to the wall ange of the vent termination is 72", 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 144", this would be
an acceptable installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the oor of the replace is 48" and
the horizontal run to the wall ange of the vent termination is 108",
this would NOT be an acceptable installation.
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.
For Heat Shield requirements see Section 3-3-3.
Once the proposed venting layout has been determined refer to
Figure 12 or 13 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 12.
Wall mounted Terminations
The following details are some possible congurations for Wall
mounted terminations.
Installation
Figure 12. L38DF-ST* Top Vent Venting Graph for wall mounted
terminations.
Figure 12a. Top Vented, wall mounted installation with 1 elbow. The
vent run must comply with Venting Graph for Top vent, wall
mounted terminations, Figure 11.
Figure 12b. Top Vented, wall mounted Multi-elbow installation. See
Venting Graph for Top vent, wall mounted terminations,
Figure 12.
An inspection of the explosion relief flappers and door MUST be made prior to
lighting the fireplace. 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.
WARNING
C
B
36”
42”
A
If your installation does not fall within
the venting parameters, contact a
local Montigo dealer for Power
Venting options.
Unacceptable vent run
within shaded area.
Acceptable vent run
within non-shaded area.
Heat Shield
36
”
max.
42
Min.
Solid Section
Flex Section
Hearth
150” Max.
Heat
Shield
Termination
Exterior
Wall

Page 13
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Installation
Figure 12c. Top Vented, wall mounted Retracted Multi-elbow installation.
See Venting Graph for Top vent, wall mounted terminations,
Figure 12.
Heat Shield
96”Min.
120” Max

Page 14
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
42”
42”
26 3/4”
12”
Figure 13b. Side 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 13.
Figure 13a. Straight run, Side Vented, wall mounted termination for
L38DF-ST*, Figure 13.
Notes Wall Mounted Terminations: SIDE 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 13.
Fireplace must be converted to Rear Vent conguration prior to
running vent, see Figure 8 and 8a.
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 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 120" and the horizontal
run to the wall ange of the vent termination is 138", this would be
an acceptable installation.
Example B: (Unacceptable Installation)
If the vertical dimension from the hearth is 48" and the horizontal
run to the wall ange of the vent termination is 96", this would be
would NOT be an acceptable installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the oor of the replace is 72" and
the horizontal run to the wall ange of the vent termination is 120",
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.
If your installation does not fall within
the venting parameters, contact a
local Montigo dealer for Power
Venting options.
A
C
B
Figure 13. Side Vent Venting Graph for wall mounted terminations.
Installation
An inspection of the explosion relief flappers and door MUST be made prior to
lighting the fireplace. 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.
WARNING

Page 15
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Connection and installation of the vent components should
adhere to the following guidelines:
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.
Firestops must be installed as required by National & local codes.
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.
Section 3-3-2: VENTING COMPONENTS
The following components and associated Montigo part numbers for
installation of a roof or 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 ex pipe as required and in
any orientation (Male connectors can face in any direction).
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 horizontal 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.
Rigid pipe may be cut less than half way from the female end only.
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.
A - Termination PTO-4 (3" Length)
PTO-4F (3" Length)
PVTK-1
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)
PXT - 20 (20" f/f Section)
PEXT - 1 (12" f/m Section)
PEXT - 2 (24" f/m Section)
PEXT - 3 (36" f/m Section)
PEXT - 4 (48" f/m Section)
PEXT - 6 (72" f/m 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)
F - Support Ring & Plate PSPXT-8
G - Firestop FS-8
H - Roof Flashing PRF-7 (1/12 - 7/12 pt.)
PRF-12 (7/12 - 12/12 pt.)
I - Heat Shield RHS101
J - Heat Guard PTKOG
Installation
Please refer to your building evelope engineer or waterproofing consultant for
a review of ALL penetrations through exterior walls or the roof.
IMPORTANT

Page 16
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Section 3-3-3: Heat Shields
Installing a Wall Mounted RHS8 Heat shield
The RHS8 Heat shield CANNOT be used WITHIN 36" horizontal
or 60" vertically of the replace, (see gure 14a). For applications
within these dimensions the RHS101 Heat Shield MUST be used.
To install the RHS8, frame an opening in combustible construction,
Figure 14 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 14.
Figure 14. RHS8 Installation. (Install by sliding over vent pipe where it
passes through the combustible construction).
Figure 14a. RHS8 Installation. (Minimum requirements).
Figure 15. RHS101 Installation. (Install by sliding Outer Section over
vent pipe where it passes through the combustible construction.
Figure 15a. Heat Shield. After sliding the outer section in place.
Figure 15b. RHS101 Installation.
Installing a Wall Mounted RHS101 Heat shield.
The RHS101 Heat shield MUST be used where the RHS8
Termination (Figure 14 and 14a) CANNOT be used. Use the
RHS101 where any of the dimensions are within the parameters
shown, gure 14a. 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. From the outside slide the RHS101 outer section on
see Figure 15. To complete the installation fasten the Heat Shield
Outer Section & Termination frame to the structure Figure 15a.
RHS8 Heat Shield
1” Min. Both sides Typical
1” Min.
1” Min.
Combustible Framing
Termination
Drywall / sheetrock
RHS101 Heat Shield, inner Section
RHS101 Heat Shield
Outer Section
Combustible
framing
Termination
Drywall / sheetrock
RHS101 Heat Shield, inner Section
RHS101 Heat Shield
Outer Section
Vent pipe, from fireplace
Installation
Outer Shield 10 1/4”
3/8” Min. Both sides Typical
3/8” Min.
3/8” Min .
Combustible Framing
Inner Shield 9 3/8”
RHS8 Heat
Shield
36” Min
60” Min.
Termination

Page 17
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Models Included
L38DF-STN-F
L38DF-STL-F
Figure 16. Wiring Diagram for the SIT Proame 2 Electronic Ignition
Manifold Pressure
Test Connection
Wall Switch
Power
Generator
Pilot Adjustment Screw
Inl
e
t Pr
essu
r
e
'Hi-Lo' Adjustment Knob
Gas Control Knob (Shown in “Pilot” position)
Figure 17. Wiring Diagram for SIT Nova 820 gas and pilot.
Models Included
L38DF-STN
L38DF-STL
Section 4: Wiring
Installation
1.5V AA type
1.5V AA type
1.5V AA type
1.5V AA type
BLACK
WHITE
GREEN
To PPO
SPARK
SENSOR
RED
BLACK
BATTERY
PACK
TO ON/OFF
WALL SWITCH
YELLOW/GREEN
ORANGE
GREEN
6
10
4
6
3
4
OPTIONAL CPI/IPI SWITCH
BLUE
WHITE
X1
X5
X4
X3
X2
LED Lights
LED1 - Red LED
LED2 Amber LED
3.15A FUSE
SW1
WHITE
BLACK
OPTIONAL

Page 18
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
NOTE: If any of the original wire supplied with the appliance is
replaced, it must be replaced with the same type, or its
equivalent.
Installing the remote On/Off Wall Switch
The L38DF-ST* gas valve may be connected to a wall switch. Do
NOT connect any external power to the remote switch. The valve will
generate its own power on a millivolt circuit or will draw its power from
an AC Connection inside the replace, depending on the model of the
unit. Use only low voltage wire, and DO NOT connect any external
power to the remote switch.
Refer to Figure 16 or 17 for wiring requirements.
NOTE: The switch location must not exceed 30' from the replace.
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 18. Wiring schematic for optional fans.
G
L2-WH
L1-BLK
p g
Quick Connect
lu to motor
5/1/60 Supply
G L1 L2
Installation

Page 19
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Section 5: Installing the Gas Line
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 repre-
sentative to purchase a conversion kit.
Conversion kits must be installed by a qualied service techni-
cian.
Section 5-2: GAS PRESSURE
Optimum appliance performance requires proper input pres-
sures.
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.
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 re-
move a 1/8” N.PT. plug to be tted with a hose barb.
Montigo requires a service shut off valve be located in an ac-
cessible 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 19 for location of gas line access.
Flexible gas connectors must not exceed 3 feet in length, un-
less 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 19. Gas line access.
When pressure testing the fireplace, Gas line, and input system follow the appropriate
local codes or your area. DO NOT connect the fireplace to pressures in excess of
1/2lb. This will damage the gas control valve.
NOTICE
Installation
7”
1 3/4”
2 3/8”
1 3/4”

Page 20
L38DF-ST* Indoor Gas Fireplace
XG0810 - 070714
Section 6: Finishing
Figure 20. Combustible mantels and facings.
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 20.
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.
Installation
Figure 21. Combustible surrounds. Typical both sides.
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.
Side wall clearances are 3". Combustible surrounds may be installed
with 3" clearance to the side of the replace as shown in Figure 21.
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.
CAUTION
Horizontal Run (in.)
Vertical Height (in.)
top of fireplace
Steel Stud construction allowable
within the grey area
Metal header
Non-combustible Facing
First combustible stud
Combustible Faceing
Combustible construction
allowed in shaded area
6”
3
”
Drywa
ll
/
Sheetrock
MetalHeader
NonCombustible
Facing Material
6”