Montigo L38DF-STN Instruction Manual

L38DF-ST Indoor
Indoor
Resi
dential
Gas Fireplace
®
C US
Read and understand this manual. Improper installation, adjustment, alteration,
serviceormaintenancecancauseseriousinjury,propertydamageorevendeath.
For assistance or additional information consult a qualified installer, service
agency or the gas supplier.
DANGER
Installation & Maintenance Manual
Donotstoreorusegasolineorany other flammable vapors andliquidsin 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
Watchyour step
Slipperyfloor
Hightemperatures
Glasshazard
Dangerof suffocation
Highvoltage
Toxic
Flammablematerials
Corrosive
Forklift trucks
Dangeroverhead crane
Explosionrisk
Oxidising
Dangerof death
Biohazard
LaserRadiation
Dangerof entrapment
Hotsurface
GeneralWarning
Blank
Gasbottles
Watchfor
fallingobjects
Electricity
Dangerfor cutter
Entrapmenthazard
Batteryhazard
Rotatingparts
Lowtemperature
Strongmagnetic field
Opticalradiation
Nonionizing
radiation
Radiation
Hazardousto the
Environment
Dangerof harming
yourhands
Irritant
Cutting
Watchyour step
Slipperyfloor
Hightemperatures
Glasshazard
Dangerof suffocation
Highvoltage
Toxic
Flammablematerials
Corrosive
Forklift trucks
Dangeroverhead crane
Explosionrisk
Oxidising
Dangerof death
Biohazard
LaserRadiation
Dangerof entrapment
Hotsurface
GeneralWarning
Blank
Gasbottles
Watchfor
fallingobjects
Electricity
Dangerfor cutter
Entrapmenthazard
Batteryhazard
Rotatingparts
Lowtemperature
Strongmagnetic field
Opticalradiation
Nonionizing
radiation
Radiation
Hazardousto the
Environment
Dangerof harming
yourhands
Irritant
Cutting
Watchyour step
Slipperyfloor
Hightemperatures
Glasshazard
Dangerof suffocation
Highvoltage
Toxic
Flammablematerials
Corrosive
Forklift trucks
Dangeroverhead crane
Explosionrisk
Oxidising
Dangerof death
Biohazard
LaserRadiation
Dangerof entrapment
Hotsurface
GeneralWarning
Blank
Gasbottles
Watchfor
fallingobjects
Electricity
Dangerfor cutter
Entrapmenthazard
Batteryhazard
Rotatingparts
Lowtemperature
Strongmagnetic field
Opticalradiation
Nonionizing
radiation
Radiation
Hazardousto the
Environment
Dangerof harming
yourhands
Irritant
Cutting
Watchyour step
Slipperyfloor
Hightemperatures
Glasshazard
Dangerof suffocation
Highvoltage
Toxic
Flammablematerials
Corrosive
Forklift trucks
Dangeroverhead crane
Explosionrisk
Oxidising
Dangerof death
Biohazard
LaserRadiation
Dangerof entrapment
Hotsurface
GeneralWarning
Blank
Gasbottles
Watchfor
fallingobjects
Electricity
Dangerfor cutter
Entrapmenthazard
Batteryhazard
Rotatingparts
XG0810 151126
Canadian Heating Products Inc. Langley, BC V4W 4A1 | Montigo Del Ray Corp. Ferndale, WA 98248

Page 2
You must read and understand this manual prior to installation, operation or
troubleshootingthis appliance.Please retainthis owner’smanual forfuture reference
and maintenance.
NOTICE
XG0810 - 151126
Table of Contents
L38DF ST* Indoor Gas Fireplace
Instruction Manual Contents
SafetyAlerts 3
Introduction 3
SectionA: Before You Start 4
Installation Checklist 4
Rating Plate Sample 5
Section 1: Installation Overview and Product Dimensions 6
Section 2: Framing 7
Clearances 8
Section 3: Venting 9
Section 3-2: Installing a Roof Mounted Direct Vent Termination
(PVTK-1) 10
Section 3-3: Installing a Wall Mounted Direct Vent Termination 12
Section 3-3-1: Venting Layout: Wall mounted termination 13
Section 3-3-2: Venting Components 16
Section 3-3-3: Heat Shields 17
Section 4: Wiring 18
CPI [Continuous Pilot Ignition] / IPI [Intermittent Pilot Ignition] Jumper
Cable Installation (only available for SIT Electronic Ignition Systems)
20
Section 5: Installing the Gas Line 21
Section 5-1: FUEL CONVERSION 21
Section 5-2: GAS PRESSURE 21
Section 5-3: GAS CONNECTION 21
Section 6: Finishing 22
Section 7: Screen Installation and Removal 23
Section 8: Installing & Removing the Door 24
Section 9: Installing theAccessories 25
Section 10: Start up Sequence 26
Standing (Continuous) Pilot Ignition (SIT NOVA820) 26
SIT Proame 2 Electronic Ignition 27
Optional Remote Operation 28
Maintenance 33
Troubleshooting: 34
SIT Nova 820: 34
SIT Proame 2: 34
Replacement Parts 35
AppendixA: Venting Terminations 36

Page 3
XG0810 - 151126
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
L38DF ST* Indoor Gas Fireplace
Safety Alert Key
Introduction
Safety Alerts
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.
Thismanualcoversinstallation,operationandmaintenance.
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.
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
Warranty and Installation Information: (See Appendix B)
TheMontigowarrantywillbevoidedby,andMontigodisclaimsany
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
manualinstructions areapplicable toall modelsdesignated
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

L38DF-ST* Indoor Gas Fireplace
Page 4 XG0810 - 151126
Installation
Installation Checklist
Determine the desired install location of your replace.
See Section 1, Dimensions on Page 6, and refer to the
Framing Section 2 for details.
Selectthelocationofyourterminationandresultingventrun.
Yourselectedterminationlocationmustbethehighestpoint
in the Direct Vent installation.
Shoulditbeimpossibletomeettheventingrequirementslaid
outinSection3:Venting,pleasecontactyourlocalMontigo
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 and/or rigid pipe.
Layout Electrical Requirements Refer to Section 4: Wiring,
for Details.
RefertoSection5:InstallingtheGasLine,fordetailsonthe
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, CSAB149. Electrical Installa-
tions 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 USAmust conform to the local codes or in
the absence of local codes to the current version of National
Fuel Gas Code,ANSI Z223.1/NFPA54. Electrical Installations
must conform to the local codes or, in the absence of local
codes, to the current version of the National Electrical Code,
ANSI/NFPA70. SeeAppendix 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
fora permit prior tostarting theinstallation. Itisthe responsibility
of the installer to ensure this replace is installed in compliance
with the manufacturers instructions and all applicable codes.
BEFORE YOU START:
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.
Youngchildren shouldbe carefully supervised whenthey are in thesame room as the
appliance.
Clothing or other flammable materials should not be placed on or near the appliance.
CAUTION
Whenthis applianceis installed directlyon anycombustiblematerial otherthan 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.
Theapplianceshouldbeinspectedbeforeuseandatleastannuallybyaprofessional.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
thefireplace are kept clean.
NOTICE
WARNING
Abarrier designed to reduce theriskof burns from hot viewingglass is provided with this
applianceand shall be installed fortheprotection of children and otherat-risk individuals.
Ifthe barrier becomes damaged, thebarriershall be replaced with themanufacturer’s
barrierfor this appliance.
WARNING
Anysafety screen, guard, or barrierremovedfor servicing an appliance mustbe replaced
priorto operating the appliance.
Section A: Before You Start

L38DF-ST* Indoor Gas Fireplace
Page 5
XG0810 - 151126
Installation
Rating Plate Sample
Figure A: Rating Plate for L38DF-ST - SIT Standing Pilot Figure B: Rating Plate for L38DF-ST - IPI Electronic Ignition
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 
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LBL1205-V6.1 Stand. Pilot- Screen DEC06.2014
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    
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Teklynx LabelView Demo
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LB1223-V5.1 SIT IPI -with screen DEC06.2014
  
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    
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  
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    
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 
 
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 

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Teklynx LabelView Demo

L38DF-ST* Indoor Gas Fireplace
Page 6 XG0810 - 151126
Installation
Figure 1. Fireplace dimensions. (Tolerance ± ⅛").
Section 1: Installation Overview and Product Dimensions
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 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
"
959
19 3
8
"
492
35 1
4
"
895
47
8
"
125
51
4
"
133
29 1
2
"
749
5"
127
8"
203
7"
177
24"
609
36 1
4
"
921
26 5
8
"
676
25 1
4
"
641
Front View
Top View
Side View

L38DF-ST* Indoor Gas Fireplace
Page 7
XG0810 - 151126
Installation
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.
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
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

L38DF-ST* Indoor Gas Fireplace
Page 8 XG0810 - 151126
Installation
When installing a shelf over the top of the replace, the follow-
ing 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" See
Section 6
Finishing
around
the re-
place
† NOTE: Clearance from top of replace to a 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
characteristics, ie: cement board or equivalent. This is recom-
mended in applications where the facing materials will not
adhere to the metal nailing ange.
6"
Supplied
Non-Combustible
Header

L38DF-ST* Indoor Gas Fireplace
Page 9
XG0810 - 151126
Installation
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 from Top 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
theTopventoutlet.Fastenthecoverwithincludedhardware,
as illustrated Figure 8a.
4. Installthe (5"and8")collars to theSideventoutlet usingthe
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 termina-
tion 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 toAppendix 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.
Silicone application is NOT required when joining Mon-
tigo vent pipes and components.
Cover Plate
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

L38DF-ST* Indoor Gas Fireplace
Page 10 XG0810 - 151126
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,
seeAppendix A.
Termination location must be a minimum 6’from a me-
chanical air inlet.
Amaximum of two offsets (each offset is made up of
2-90° bends) may be made for vertical vent runs.
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

L38DF-ST* Indoor Gas Fireplace
Page 11
XG0810 - 151126
Installation
Figure 9c. Side vent, Roof mounted venting (1 = 90° bend).
PEXT
Solid Sectio
n
PVTK1 Termination
12” Max.
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

L38DF-ST* Indoor Gas Fireplace
Page 12 XG0810 - 151126
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
ATermination 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
structure 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,
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.
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 MTKOG (5"/8")
Installing Heat Guards over Terminations is recommended in in-
stallations 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 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
ATermination with a MOSR Frame is installed from the inside of
the structure. These are commonly used in high-rise construc-
tion.
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

L38DF-ST* Indoor Gas Fireplace
Page 13
XG0810 - 151126
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 12 with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
ExampleA: (Acceptable Installation)
Iftheverticaldimensionfromthehearthis96"andthehorizontal
run to the wall ange of the vent termination is 72", this would
be an acceptable installation.
Example B: (Acceptable Installation)
Iftheverticaldimensionfromthehearthis60"andthehorizontal
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 termi-
nation
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.
Figure 12. L38DF-ST* Top Vent Venting Graph for wall mounted
terminations.
Figure12a.TopVented,wallmountedinstallationwith1elbow.The
ventrun mustcomplywith VentingGraphforTopvent,
wall mounted terminations, Figure 11.
Figure12b.TopVented,wallmountedMulti-elbowinstallation.See
VentingGraphforTopvent,wallmountedterminations,
Figure 12.
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

L38DF-ST* Indoor Gas Fireplace
Page 14 XG0810 - 151126
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
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

L38DF-ST* Indoor Gas Fireplace
Page 15
XG0810 - 151126
Installation
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.
ExampleA: (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)
Iftheverticaldimensionfromthehearthis48"andthehorizontal
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 termina-
tions.
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

L38DF-ST* Indoor Gas Fireplace
Page 16 XG0810 - 151126
Installation
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.
Montigorecommendsthatallexteriorcornersandjointsbe
sealedwithexteriorcaulking.However,weencourageyouto
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 num-
bers 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
anyorientation(Maleconnectorscanfaceinanydirection).
Flexsectionsmaybestretchedupto50%oftheirtotallength
(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.
Whenhanging/supportingventing,ensurethat1”clearance
ismaintainedonsidesandbottomofventrunsand2”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
outerand inner pipesto keepthe pipes separate andavoid
any possible hot spots.
A- Termination PTO4 (3" Length)
PTO4F (3" Length)
PVTK1SS
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 MTKOG
Please refer to your building evelope engineer or waterproofing consultant for
a review of ALL penetrations through exterior walls or the roof.
IMPORTANT

L38DF-ST* Indoor Gas Fireplace
Page 17
XG0810 - 151126
Installation
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 construc-
tion, 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 dimen-
sions 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 con-
struction.
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
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
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

L38DF-ST* Indoor Gas Fireplace
Page 18 XG0810 - 151126
Installation
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
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
BLUE
RED
OPTIONAL
X10
X11
X12
X13
jumper

L38DF-ST* Indoor Gas Fireplace
Page 19
XG0810 - 151126
Installation
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 re-
place.

L38DF-ST* Indoor Gas Fireplace
Page 20 XG0810 - 151126
Installation
Installing the CPI Jumper Cable
1). Access the controller (refer to the installation and
maintenance manual for your model).
2). Remove the bag containing the Jumper Cable from
the wiring harness connected to the controller as shown
in Figure 18.
3). Find the corresponding plug attached to the control
wire harness and connect the CPI jumper.
4). See remote operation manual to turn remote into CPI
mode.
Figure 18.
Figure 18a.
Figure 18b.
CPI [Continuous Pilot Ignition] / IPI [Intermittent Pilot
Ignition] Jumper Cable Installation (only available
for SIT Electronic Ignition Systems)
“Why use CPI mode”?
CPI means “Continuous Pilot Ignition” or “Standing Pilot”
as it is commonly known. IPI means “Intermittent Pilot Ig-
nition”, which only initializes the pilot when you are going
to be using the appliance.
There are several reasons why you may choose to use
CPI mode. When a ue is cold it can be difcult to light
the appliance. It can take a bit of time (particularly on tall
vents) to initialize vent action. This can result in “lifting”
or “ghosting” of the ames during the rst two to three
minutes of operation. It is also possible to encounter
times when the replace fails to light successfully. The
replace will then attempt to re-light a second or third
time depending on prevailing temperatures or altitude.
When in CPI mode the pilot also keeps the system warm.
During a “cold” start, condensation will normally form on
the inner glass surface of the door. This condensation will
quickly dry, however, the condensation tends to run down
the glass and cause some streaking. CPI mode helps to
resolve this issue. If CPI mode is used during the winter
months the energy it takes to run the pilot is partially re-
covered as heat into the building, so it does not waste as
much energy as running a pilot in the off season.
If you use a wall switch:
A connector is supplied with this unit that can be plugged
into the wire harness connected to the controller. When
the CPI jumper is connected, the pilot will light and re-
main lit continuously. Use the wall switch to turn the main
burner on or off. To switch back to IPI mode you must
unplug the CPI jumper.
If you use the optional remote:
A connector is supplied with this unit that can be plugged
into the wire harness connected to the controller. This
Jumper Cable gives the Remote Control the ability to
operate the CPI / IPI switch and set the unit to operate in
either condition.
The difference between IPI and CPI:
IPI (Intermittent Pilot Ignition) Mode: is a fuel sav-
ing mode in which the pilot is only used when the main
burner is on.
CPI (Continuous Pilot Ignition) Mode: The Pilot runs
continuously even when the main burner is off.