Montigo L52DF-ST Instruction Manual

Canadian Heating Products Inc. Langley, BC V4W 4A1 | Montigo Del Ray Corp. Ferndale, WA 98248
XG0811 151126
L52DF-ST Indoor
L-Series
Residential
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 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
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

Page 2 XG0811 - 151126
Table of Contents
L52DF*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 to Combustibles 8
Section 3: Venting 9
Section 3-2: Installing a Roof Mounted Direct Vent Termination
(PVTK-1) 9
Section 3-2-1: Venting Layout 9
Roof mounted Terminations 9
Section 3-3: Installing a Wall Mounted Direct Vent Termination
11
Section 3-3-1: Venting Layout: Wall mounted termination. 12
Section 3-3-2: Venting Components 14
Section 3-3-3: Heat Shields 15
Section 4: Wiring 16
CPI [Continuous Pilot Ignition] / IPI [Intermittent Pilot Ignition] Jumper
Cable Installation (only available for SIT Electronic Ignition Systems)
17
Section 5: Installing the Gas Line 18
Section 5-1: Fuel Conversion 18
Section 5-2: Gas Pressure 18
Section 5-3: Gas Connection 18
Section 6: Finishing 19
FinishingAround the Fireplace 19
Mantels & Surrounds 19
Section 7: Screen Installation and Removal 20
Section 8: Installing & Removing the Door 21
Section 9: Installing theAccessories 22
Installing the Firestones 22
Optional Cultured Rocks 22
Section 10: Start up Sequence 23
Standing (Continuous) Pilot Ignition (SIT NOVA820) 23
Operation 23
SIT Proame 2 Electronic Ignition 24
Optional Remote Operation 25
General 30
Cleaning 30
Maintenance 30
Hi-Lo BurnerAdjustment: (SIT Nova 820). 30
Hi-Lo Burner Adjustment: (SIT Proame 2). 30
Pilot BurnerAdjustment. 30
Troubleshooting 31
SIT Nova 820: 31
SIT Proame 2: 31
Replacement Parts 32
AppendixA: Venting Terminations 33
Appendix B: Warranty 34
Appendix C: State of Massachusetts 35

Page 3
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.
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 are applicableto all modelsdesignated
as L52DF-ST* unless otherwise noted.
L52DF-STN X 40,000 X X
L52DF-STL X 40,000 X X
L52DF-STN-F X 40,000 X X
L52FDF-STL-F X 40,000 X X
MODEL Natural Gas Liquid Propane Gas Rating (BTU hr) Linear Burner w/ Glass Accessories Standard Pilot Ignition SIT Electronic Ignition
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
Safety Alerts
Introduction
XG0811 - 151126
L52DF*ST Indoor Gas Fireplace
Safety Alert Key
Introduction

L52DF*ST Indoor Gas Fireplace
Page 4 XG0811 - 151126
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 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/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 L52DF-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
forapermitpriortostartingthe installation. It is the responsibility
of the installer to ensure this replace is installed in compliance
with the manufacturers instructions and all applicable codes.
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 supervisedwhenthey are inthesame room asthe
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 keptclean.
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
Installation

L52DF*ST Indoor Gas Fireplace
Page 5
XG0811 - 151126
Rating Plate Sample
Figure A: Rating Plate for L52DF-ST
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LBL1205-V6.1 Stand. Pilot- Screen DEC06.2014
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    
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Teklynx LabelView Demo
Installation

L52DF*ST Indoor Gas Fireplace
Page 6 XG0811 - 151126
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 L52DF-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:
47"
1194
21 3
4
"
553
52"
1321
33 1
4
"
844
58 1
4
"
1480
53
8
"
138
6"
152
23 7
8
"
606
8"
203
5"
127
36 5
8
"
931
34 3
4
"
884
Front View Side View
Top View
Installation

L52DF*ST Indoor Gas Fireplace
Page 7
XG0811 - 151126
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 59" wide x 39"
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 15.
59”
39”
23 3/4“
59”
Figure 4. Framing for shelves over the fireplace, Top Vent
(Combustible materials).
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.
Elbow
39”
30”
Header
Shelf
84”
Installation

L52DF*ST Indoor Gas Fireplace
Page 8 XG0811 - 151126
When installing a shelf over the top of the replaces, the mini-
mum clearance is 30" to the underside of any combustible shelf
materials.
MODEL Top - Top vent †
Sides Floor Mantel
L52DF-ST* 30" 1" 0" See Section
6 Finishing
around the
replace
† NOTE: Clearance from top of replace to a ceiling within the
replace enclosure.
Clearances to Combustibles
1” clearance is maintained on sides and bottom of vent runs and
2” above horizontal vent runs to any combustible material.
Installation

L52DF*ST Indoor Gas Fireplace
Page 9
XG0811 - 151126
Section 3: Venting
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 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 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.
Figure 6. 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.
Figure 6a. Top vent, Roof mounted with 1 offset
(1 offset= two 90° bends).
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 7 to 7b).
Termination location must be a minimum 6’from a me-
chanical air inlet.
For a more detailed diagram of allowed termination loca-
tions, seeAppendixA.
Amaximum of two offsets (each offset is made up of two
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
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.
Installation

L52DF*ST Indoor Gas Fireplace
Page 10 XG0811 - 151126
Figure 6b. Top vent, Roof mounted with 2 offsets
(1 offset= two 90° bends).
PVTK1 Termination
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.
Installation

L52DF*ST Indoor Gas Fireplace
Page 11
XG0811 - 151126
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 7. Installing a PTO4-F termination.
Figure 7a. Installing a PTO termination with the MSR frame.
Figure 7d. 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 7b. 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 8. 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 construction.
MOSR Frame
PTO-4 (5"/8")
Termination
Figure 7c. 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
Installation

L52DF*ST Indoor Gas Fireplace
Page 12 XG0811 - 151126
The Venting Graph: L52DF-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 9 with an 'X'.
Ifthe'X'fallsonorabovethetopboundaryof theshadedarea, the
installation is acceptable.
ExampleA: (Acceptable Installation)
Iftheverticaldimensionfromthehearthis90"andthehorizontal
run to the wall ange of the vent termination is 36", this would
be an acceptable installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 108" and the
horizontal run to the wall ange of the vent termination is
120", 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.
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 9.
Wall mounted Terminations
The following details are some possible congurations for Wall
mounted terminations.
Figure 9. L52DF-ST* Top Vent Venting Graph for wall mounted
terminations.
Figure 9a. Top Vented, wall mounted installation with 1 elbow. The
ventrun mustcomply withVentingGraphforTopvent,
wall mounted terminations, Figure 9.
Figure 9b. Top Vented, wall mounted Multi-elbow installation. See
VentingGraphforTopvent,wallmountedterminations,
Figure 9.
B
A
Horizontal Run
(
in.
)
Vertical Height (in.)
96”
120”
C
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.
60”
84”
Heat Shield
60” Max.
84” Min
.
Solid Section
Flex Section
Hearth
Heat
Shield
Exterior
Wall
.
150" MAX
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
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.
Oncetheproposedventinglayouthasbeendeterminedrefer
to Figure 9 to ensure the layout is acceptable.
Installation

L52DF*ST Indoor Gas Fireplace
Page 13
XG0811 - 151126
Figure 9c. Top Vented, wall mounted Retracted Multi-elbow
installation. See Venting Graph for Top vent, wall
mounted terminations, Figure 9.
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.
Installation

L52DF*ST Indoor Gas Fireplace
Page 14 XG0811 - 151126
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
outerandinnerpipestokeepthepipesseparateandavoid
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
Installation

L52DF*ST Indoor Gas Fireplace
Page 15
XG0811 - 151126
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 10a). For applications
within these dimensions the RHS101 Heat Shield MUST be used.
To install the RHS8, frame an opening in combustible construc-
tion, Figure 10 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 10.
Figure 10. RHS8 Installation. (Install by sliding over vent pipe
where it passes through the combustible construction). Figure 11. RHS101 Installation. (Install by sliding Outer Section
over vent pipe where it passes through the combustible con-
struction.
Figure 11a. Heat Shield. After sliding the outer section in place.
Figure 11b. RHS101 Installation.
Installing a Wall Mounted RHS101 Heat shield.
The RHS101 Heat shield MUST be used where the RHS8
Termination (Figure 10) CANNOT be used. 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 11. To complete the
installation fasten the Heat Shield Outer Section & Termination
frame to the structure Figure 11a.
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”
Note: Images are shown without screens for clarity purposes.
However, your replace should not be operated without proper
installation of screens.
Installation

L52DF*ST Indoor Gas Fireplace
Page 16 XG0811 - 151126
Models Included
L52DF-STN-F
L52DF-STL-F
Figure 12. 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 13. Wiring Diagram for SIT Nova 820 gas and pilot.
Models Included
L52DF-STN
L52DF-STL
Section 4: Wiring
Installing the remote On/Off Wall Switch
The L52DFST* 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 12 or 13 for wiring requirements.
NOTE: The switch location must not exceed 30' from the re-
place.
NOTE:If any of the original wire supplied with the appliance is replaced,
it must be replaced with the same type, or its equivalent.
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
Installation
jumper

L52DF*ST Indoor Gas Fireplace
Page 17
XG0811 - 151126
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 14.
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 14.
Figure 14a.
Figure 14b.
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.
Installation

L52DF*ST Indoor Gas Fireplace
Page 18 XG0811 - 151126
Gasline Access
0.875dia.
6
to center
2 1/2
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
representative.
Conversion kits must be installed by a qualied service
technician.
Section 5-2: Gas Pressure
Optimum appliance performance requires proper input
pressures.
Gas line sizing requirements will be determined in ANSI
Z221.3 National Fuel Gas Code in the USA and CAN/CGA
B149 in Canada.
Pressure requirements are:
Gas Pressure Natural Gas Propane
Minimum inlet pressure 5.5in. w.c. 11in. w.c.
Manifold pressure 3.5in. w.c. 10in. w.c.
Note: Aftergaslineisconnected,eachapplianceconnection,
valve and valve train must be checked while under
normaloperatingpressurewitheitheraliquidsolution,
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
remove a 1/8” N.PT. plug to be tted with a hose barb.
Montigo requires a service shut off valve be located in an
accessible location to isolate the gas supply.
Only install gas shut-off valves approved for use by the
state, province, or other governing body in which the
replace is being installed.
Section 5-3: Gas Connection
See Figure 15 for location of gas line access.
Flexible gas connectors must not exceed 3 feet in length,
unless allowable within local regulations.
Connect incoming gas line to the 1/2"or 3/8" gas inlet
port.
Purge all air out of gas line.
Check appliance connection, valve and valve train under
normal operating pressure with a commercially available
leak check solution.
DO NOT USE A FLAME OF ANY KIND TO TEST FOR
LEAKS.
Figure 15. Gas line access.
Whenpressuretestingthe fireplace,Gasline, andinputsystem followtheappropriate
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
WARNING
When installing the replace - gas lines, ttings, accesso-
ries or any other objects cannot impede the proper
movement of the door buckles.
Installation

L52DF*ST Indoor Gas Fireplace
Page 19
XG0811 - 151126
Section 6: Finishing
Figure 16. 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 16.
Fireplace Facing
When sizing the nish material for your replace, it is important
to remember the following: THE OPENING MUST NOT BE OB-
STRUCTED IN ANY WAY - to do so restricts the air supply for the
controlcompartmentsandheatexchangeritalsopreventsaccess
for servicing controls.
The face of the replace may be painted to match the room decor,
provided you use a heat-resistant paint. Decorative facing must
not extend past the replace opening at all, because it will interfere
with the access to retainers for removal of glass door.
Figure 16a. Combustible surrounds. Typical both sides.
Mantels & Surrounds
NOTE: National Canadian GasAssociation mantel test require-
ments 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 16a.
6”
3
”
Drywa
ll
/
Sheetrock
Combustible
Header
Combustible
Facing Material
Material
Combustible
Construction allowed
in shaded area
Horizontal Run (in.)
Vertical Height
(
in.
)
Top of fireplace
Horizontal Run (in.)
Vertical Height
(
in.
)
Top of fireplace
Combustible
Facing
Horizontal Run (in.)
Vertical Height
(
in.
)
Combustible Stud
Top of fireplace
We recommend careful consideration be given to the effects of elevated mantel
temperatureswhichmaybe in excess of product design, for example: candles, plastic
orpictures. Thiscancausemelting,deformation,discolorationorprematurefailureof
T.V. radio, and other electronic components.
CAUTION
Steel stud construction allowable
within greyed area.
WARNING
Do not place any materials or objects on top of the
valve blind. Doing so could result in failure of door
relief system or heat dissipation.
Installation

L52DF*ST Indoor Gas Fireplace
Page 20 XG0811 - 151126
Section 7: Screen Installation and Removal
Screen Bottom
Tabs
Screen Tab
Receptacles
Upper Screen
Studs
Upper Screen
Stud Catch
Left Side Detail
Left Side Detail
Removing / Attaching
The Safety Screens
To Remove the screen(s)
Simply grasp each top
outer corner of the screen
with your thumb and
finger and pull towards
you. Once the upper
Screen Studs are free, at
an angle, lift the screen
from the lower slots in
which the Screen Bottom
Tabs are held. Place the
screen in a safe place.
To Install the Screen(s).
Holding the screens at an
angle away from the
fireplace, locate the
Screen Bottom Tabs at the
lower corners of the
screen into the Screen
Tab Recepticles in the
lower section of the
fireplace. Make sure the
tabs and screens are
lowered all the way down
into the Screen Tab
Recepticles on the
fireplace. Then push each
Upper Screen Stud at the
top corners of the screen
into the Upper Screen
Stud Catchs in the
fireplace.
Removing /Attaching Screens:
To Remove Screens:
Grasp each top outer corner of the screen with your
thumb and nger and pull towards yourself. When the up-
per Screen Studs are free, lift the screen at an angle from
the lower slots from which the Screen Bottom Tabs are
held. Place the screen in a safe place.
To Install Screens:
Hold the screens at an angle away from the replace, and
locate the Screen Bottom Tabs at the lower corners of the
screen. Place the screen into the Screen Tab Receptacles
in the lower section of the replace.
Make sure the tabs and screens are lowered all the way
down into the Screen Tab Receptacles on the replace.
Then, push each Upper Screen Stud on the top corners of
the screen into the Upper Screen Stud Receptacles in the
replace.
Figure 17b. Screen Installation and Removal
Figure 17a. Screen Door Numbers (Replacement Parts)
Replacement Screens:
For replacement part order numbers, please refer to sec-
tion "Replacement Parts:" on page 31.
Note: Do not operate replace without all screens in place.
Installation