Montigo L42DF ST Instruction Manual

®
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
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
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
XG0182 151126
L42DF ST Indoor
L-Series
Residential
Fireplace
Installation & Maintenance Manual
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
Table of Contents
L42DF-ST Indoor Gas Fireplace
XG0182- 151126
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
Installing the Heat Guard 9
Installing the Nailing Flange Extension 9
Section 3: Venting 10
Section 3-1: Converting To Side Vent 10
Section 3-2: Installing a Roof Mounted Direct Vent Termination
(PVTK-1) 11
Section 3-2-1: Venting Layout 11
Roof mounted Terminations 11
Section 3-3: Installing a Wall Mounted Direct Vent Termination13
Section 3-3-1: Venting Layout: Wall mounted termination. 14
Section 3-3-2: Venting Components 17
Section 3-3-3: Heat Shields 18
Section 4: Wiring 19
Section 5-1: Fuel Conversion 21
Section 5-2: Gas Pressure 21
Section 5-3: Gas Connection 21
Section 6: Finishing 22
FinishingAround the Fireplace 22
Mantels & Surrounds 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
Maintenance 28
Hi-Lo BurnerAdjustment: (SIT Nova 820). 28
Hi-Lo Burner Adjustment: (SIT Proame 2). 28
Pilot BurnerAdjustment. 28
Troubleshooting: 29
SIT Nova 820: 29
SIT Proame 2: 29
Replacement Parts 30
AppendixA: Venting Terminations 31
Appendix B: Warranty 32
Appendix C: State of Massachusetts 33

Page 3
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
L42DF-ST* Indoor Gas Fireplace
Safety Alert Key
Introduction
XG0182 - 151126
L42DF-STN X 34,000 X X
L42DF-STN-F X 34,000 X X
L42DF-STDL X 34,000 X X
L42DF-STL-F X 34,000 X X
MODEL Natural Gas Liquid Propane Gas Rating (BTU hr) Linear Burner w/ Glass Accessories Standard Pilot Ignition SIT Electronic Ignition
Introduction
Congratulations on your purchase of a Montigo Fireplace.
Withover30yearsofexperience,Montigoiscommittedtoproviding
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
instructionslaidoutinthisInstallation,OperationandMaintenance
Manualandretainitforyourfuturereference. Payspecialattention
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 in the table. Refer to
your rating plate to verify included options. Throughout
this manual instructions are applicable to all models
designated as L42DF-ST* unless otherwise noted.
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
SafetyAlerts

Page 4
L42DF-ST* Indoor Gas Fireplace
XG0182 - 151126
Installation
SectionA: Before you Start
IMPORTANT MESSAGE: SAVE THESE INSTRUCTIONS
The L42DF*-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 the installation.It is theresponsibility
of the installer to ensure this replace is installed in compliance
with the manufacturers instructions and all applicable codes.
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,pleasecontactMontigoregarding
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 mustconform tothe localcodes or inthe
absence of local codes to the current version of Natural Gas and
PropaneInstallationCode,CSAB149.ElectricalInstallationsmust
conformto the localcodesor,inthe absence oflocalcodes,to the
current version of Canadian Electrical Code, CSAC22.1.1
•Installations in theUSAmustconformto the localcodesorinthe
absenceoflocalcodesto 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
versionoftheNationalElectricalCode,ANSI/NFPA70. SeeAppendix
C for installation within the State of Massachusetts..
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 keptclean.
NOTICE
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.
Youngchildrenshould becarefully supervisedwhen they are in thesame roomas the
appliance.
Clothing or other flammable materials should not be placed on or near the appliance.
CAUTION
Whenthisappliance isinstalleddirectly onanycombustible materialotherthan 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
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.

Page 5
L42DF-ST* Indoor Gas Fireplace
XG0182 -151126
Installation
Rating Plate Sample
FigureA: Rating Plate for L42DF-ST
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LBL1205-V6.1 Stand. Pilot- Screen DEC06.2014
  
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    
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

 
 
 


 



Teklynx LabelView Demo

Page 6
L42DF-ST* Indoor Gas Fireplace
XG0182 - 151126
Installation
Section 1: Installation Overview and Product Dimensions
Figure 1: Unit Dimensions (Tolerance ± ⅛").
Please review the Installation Checklist on Page 4 for general
information on preparing for a successful installation of your
replace.
The L42DF-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
ventilationandoffersanaccessiblepathforDirectVentinstallation.
Front View
Top View
Side View
30 1
2
"
775
53
8
"
137
39 1
2
"
1003
20 1
4
"
515
43 1
2
"
1106
43
4
"
122
12"
305
40 3
4
"
1036
5"
127
8"
203
24 1
8
"
613
34 1
8
"
867
30 1
2
"
775

Page 7
L42DF-ST* Indoor Gas Fireplace
XG0182 -151126
Installation
Section 2: Framing
Frame in the enclosure for the unit with framing materials. The
framed opening for the assembled replace is 45" 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 20.
Figure 2. Framing dimensions. Both walls typical.
Figure 4. Combustible Framing for shelves over the replace, Top
vent.
Figure 5. Combustible Framing for shelves over the replace,
Side vent.
Figure 6. Non Combustible Framing with alcove above replace,
Right side. Combustible Framing above replace, Left side, see
gure 2. (Top Vent).
12” Min.
Combustible
shelf
Supplied shield
90°
1” Min.
1” Min.
L.P. & N.G
12” Max.
4
1”Min N.G.
54”Min L.P.
12” (NG)
17” (LP)
Min.
PEL Short
90 elbow
Supplied shield
Combustible Shelf
N.G. & L.P
2” Min.
Non
Combustible
Header
7”
Floor
Alcove over
Fireplace Non
Combustible
Materials Only
36”
30 1/2”
door
opening
40”
Combustible
Header
Min. 1”
Supplied
Header
10”
Top vent
N.G. & L.P
95” Min.
40”
45”
23 3/4”
4
0”
Figure 3. Securing the replace to the framing cleats,
both walls typical.
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.
4
5
”
Ceiling
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

Page 8
L42DF-ST* Indoor Gas Fireplace
XG0182 - 151126
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 12" from
the top of the replace to the underside of any combustible shelf.
For Top Vent applications, the minimum clearance is 17" for LP
and 12" for NG from the top of the replace to the underside of
any combustible shelf.
MODEL Top - Top vent †
[LP]
Top - Top vent †
[NG]
Top - Side vent †
Sides Floor Mantel
L42DF-ST* 17" 12" 12" 2" 0"
See Section
6 Finishing
around the
replace
† 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
and2” above horizontalventrunstoany combustible material.

Page 9
L42DF-ST* Indoor Gas Fireplace
XG0182 -151126
Installation
Figure 7. Combustible Framing Side Heat Shield L42FS01 x 4 pcs.
Installing the Heat Guard
Included with the L42DF-ST* Gas replace, is a framing heat shield
Kit. This kit is fabricated from galvanized steel and arrives with
six (6) pieces, as shown below. The shields protect all adjacent
combustible materials, mantels and mouldings from excessive
heat radiated by the replace.
NOTE: The shields must be installed as shown in Figures 7- 7a.
Step 1. Fasten 4 side shields in place with nails or screws, ush with
theframingasshowninFigure7 (L42FS01x4).Theseareinstalled
with the Wide anges facing the center of the replace opening,
and the shallow ange toward inside of room.
Figure 7a. Non combustible header H42ST060 x 2 pcs.
Step 2. Nail or screw the top shield in place ush with framing, as
shown in gure 7a.
Installing the Nailing Flange Extension
Once the replace is placed into the rough framed opening and the
heat guards are fastened, the supplied Nailing Flange Extension
(L42087 x 2 pcs) must be fasten securely into place, with nails or
wood screws. as shown in Figure 8.
40”
45”
23 3/4”
4
0”
35½”
Both walls Typical.M ay
not be exactly as shown.
fireplace
framing
fasteners
Both Side
shields typical
flush with
framing
INSET
Section
40”
45”
23 3/4”
4
0”
35”
Both walls Typical.M ay
not be exactly as shown.
6"
Supplied
Non-Combustible
Header
Nailing
Flange
Figure 8. 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:cementboardorequivalent.Thisisrecommended
in applications where the facing materials will not adhere to the
metal nailing ange.
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

Page 10
L42DF-ST* Indoor Gas Fireplace
XG0182 - 151126
Installation
Section 3: Venting
Figure 9. Flue cover and collar removal, Top Vented replace.
Figure 9a. Flue cover and collar installation, Side Vented
replace.
Section 3-1: Converting To Side Vent
Use the following instructions to convert an L42DF-ST* for Rear
Vent use:
1. Remove the Side ue cover and gasket (5" and 8") on the
ue outlet, as shown in Figure 9.
2. Next, Remove the Top ue collar's (5" and 8") on the ue
outlet, as shown in Figure 9.
3. Install the (removed) Side ue cover and gasket material, to
theTopventoutlet.Fastenthecoverwithincludedhardware,
as illustrated Figure 9a.
4. Installthe (5"and8")collars to theSideventoutlet usingthe
included hardware, as illustrated Figure 9a.
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 Montigo
vent pipes and components.
See Section 3-1 for converting the unit from top vent to rear vent.
5”Inner Flue
Cover Plate
8”Outer Flue
Cover Plate
8”Outer
Flue Collar
5”Inner
Flue Collar
Flue Collar
8”Outer
Flue Collar
5”Inner Flue
C
over Plate
Outer Flue
Plate
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

Page 11
L42DF-ST* Indoor Gas Fireplace
XG0182 -151126
Installation
Figure10. Top vent, Roof mounted terminationwith no offsetin vent run.
Figure10a.Topvent,Roofmountedwith1offset(1offset=two90°bends).
Figure 10b. 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.
PVTK1 Termination
PVTK1 Termination
PVTK1 Termination
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
10 - 10c).
For a detailed diagram of allowed termination locations,
seeAppendix A.
Terminationlocationmustbeaminimum6’fromamechanical
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.
PEXT
PEXT-10
Adaptor
Flue
Collar

Page 12
L42DF-ST* Indoor Gas Fireplace
XG0182 - 151126
Installation
Figure 10c. 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.

Page 13
L42DF-ST* Indoor Gas Fireplace
XG0182 -151126
Installation
1
12”
2”
12”
12”
Thissectionappliestoinstallationswherethedirectventtermination
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 11. Installing a PTO4-F termination.
Figure 11a. Installing a PTO termination with the MSR frame.
Figure 11d. 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. FastentheterminationtotheMSRFrameusingaminimumof4screws.
Figure 11b. 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.
quantityof4boltsintothethreadednutsontheMOSRFrame.
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. FastentheterminationtotheBSRFrameusingaminimumof4screws.
BSR Frame MTKOG (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
heatprotectionatthetopofthetermination,wheretemperatures
are highest.
2. Attach to the faceplate of the termination using four sheet
metal screws.
Figure 11e. 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
thestructure.Thesearecommonlyusedinhigh-riseconstruction.
MOSR Frame
PTO-4 (5"/8")
Termination
Figure 11c. 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
Section 3-3: Installing a Wall Mounted Direct Vent
Termination

Page 14
L42DF-ST* Indoor Gas Fireplace
XG0182 - 151126
Installation
The Venting Graph: L42DF-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)
If the vertical dimension from the hearth is 114" and the
horizontal run to the wall ange of the vent termination is 114",
this would be an acceptable installation.
Example B: (Acceptable Installation)
Iftheverticaldimensionfromthehearthis78"andthehorizontal
run to the wall ange of the vent termination is 54", this would
be an acceptable installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the oor of the replace is 84"
and the horizontal run to the wall ange of the vent termination
is 138", this would NOT be an acceptable installation.
Figure12.L42DF-ST*TopVentVentingGraphforwallmountedterminations.
Figure 12a. Top Vented, wall mounted installation with 1 elbow (1 one 90°
bend). The vent run must comply with Venting Graph for Top vent, wall
mounted terminations, Figure 14.
Figure12b.TopVented,wallmountedMulti-elbowinstallation.SeeVenting
Graph for Top vent, wall mounted terminations, Figure 14.
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. See below.
30 max.
54”Min.
BC
A
If your installation does not fall
within the venting graph para-
meters, please contact Montigo
for Power Venting options.
Unacceptable vent run
within shaded area.
30”
54”
Acceptable vent run
within non-shaded area.
Heat Shield
”
Solid Section
Flex Section
Hearth
150” Max. Heat
Shield
Termination
Exterior
Wall
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.
Section 3-3-1: Venting Layout: Wall mounted termination.

Page 15
L42DF-ST* Indoor Gas Fireplace
XG0182 -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.

Page 16
L42DF-ST* Indoor Gas Fireplace
XG0182 - 151126
Installation
Figure 13. Side Vent Venting Graph for wall mounted terminations.
Figure 13a. SideVented,wallmountedMulti-elbowterminationinstallation.
Installation for L42DF*-ST must have a minimum vertical rise of 54".The
ventrun must complywith the VentingGraph for Side vent,wall mounted
terminations, 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 9 - 9a.
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 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.
30” Max.
54” Min.
12”
Max.
Flex or Rigid
Section
26 1/4”
Min.
27 3/4”
Hearth
A
B
C
B
C
B
C
B
C
B
C
B
C
B
C
B
C
54”
42
B
A
C
If your installation does not fall
within the venting graph para-
meters, please contact Montigo
for Power Venting options.
Unacceptable vent run
within shaded area.
Acceptable vent run
within non-shaded area.
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.

Page 17
L42DF-ST* Indoor Gas Fireplace
XG0182 -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
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 separateand avoid
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
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.

Page 18
L42DF-ST* Indoor Gas Fireplace
XG0182 - 151126
Installation
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.
ToinstalltheRHS8,frameanopeningincombustibleconstruction,
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
beeninstalled,clearancesshouldmatchthedimensionsinFigure14.
Figure14.RHS8Installation.(Installbyslidingoverventpipewhere
it passes through the combustible construction).
Figure 14a. RHS8 Installation. (Minimum requirements).
Figure15.RHS101Installation.(InstallbyslidingOuterSectionover
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(Figure14and14a)CANNOTbeused.UsetheRHS101
where any of the dimensions are within the parameters shown, gure
14a.ToinstalltheRHS101,SlidetheInnerSectionovertheventpipe
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.
FromtheoutsideslidetheRHS101outersectiononseeFigure 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.
Section 3-3-3: Heat Shields

Page 19
L42DF-ST* Indoor Gas Fireplace
XG0182 -151126
Installation
Models Included
L42DF-STN-F
L42DF-STL-F
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
L42DF-STN
L42DF-STL
Section 4: Wiring
Figure 16. Wiring Diagram for the SIT Proame 2 Electronic Ignition
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

Page 20
L42DF-ST* Indoor Gas Fireplace
XG0182 - 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).Findthecorresponding plugattached tothecontrol 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
Ignition”,which onlyinitializes thepilotwhen you aregoing
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
thepilotalso keepsthe systemwarm. Duringa “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 recovered 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
intothewireharnessconnectedtothecontroller.Whenthe
CPI jumper is connected, the pilot will light and remain 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:
Aconnectorissuppliedwiththisunitthatcanbepluggedinto
the wire harness connected to the controller. This Jumper
Cable gives the Remote Control the ability to operate the
CPI/IPIswitchandsettheunittooperateineithercondition.
The difference between IPI and CPI:
IPI(IntermittentPilotIgnition)Mode: isafuelsavingmode
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.