Montigo HL42DF Instruction Manual

H42DF ST
HL42DF ST
Indoor
Resi
dential
Gas Fireplace
®
C US
Read and understand this manual. Improper installation, adjustment, alteration,
service or maintenance can cause serious injury, property damage or even death.
For assistance or additional information consult a qualified installer, service
agency or the gas supplier.
DANGER
Glass doors on gas fireplaces are extremely hot while the fireplace is on and
remain hot even after the fireplace has been turned off. Safety screens are
available and can reduce the risks of severe burns. Please keep children away
from the fireplace at all times.
CAUTION
Installation & Maintenance Manual
Do not store or use gasoline or any other flammable vapors and liquids in the vicinity of
this or any other gas burning appliance. A fire or explosion my occur causing serious
injury, property damage or even death.
WARNING
Installer: Leave this manual with the appliance. Do not remove.
Consumer: Retain this manual for maintenance and future reference. Do not Discard.
NOTICE
IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
Immediately call your gas supplier from a neighbor's phone. Follow the gas
supplier's instructions.
If you cannot reach your gas supplier, call the fire department.
DANGER
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
Low temperature
Strong magnetic field
Optical radiation
Non ionizing
radiation
Radiation
Hazardous to the
Environment
Danger of harming
your hands
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
Low temperature
Strong magnetic field
Optical radiation
Non ionizing
radiation
Radiation
Hazardous to the
Environment
Danger of harming
your hands
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
Low temperature
Strong magnetic field
Optical radiation
Non ionizing
radiation
Radiation
Hazardous to the
Environment
Danger of harming
your hands
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
120611.1XG0237 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
troubleshooting this appliance. Please retain this owner’s manual for furure reference
and maintenance.
NOTICE
XG0237 - 120611.1
Table of Contents
H*42DF ST Indoor Gas Fireplace
Introduction ..............................................3
Models ..............................................3
Installation
Before you Start ..........................................4
Installation Checklist .......................................4
Section 1: Installation Overview and Product Dimensions . . . . . . . . . . . .5
Section 2: Framing the Fireplace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 7
Clearances .......................................7
Section 3: The Direct Vent System . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 15
Section 3-1: Converting from Top Vent to Side Vent . . . . . . . . . . . . .8
Section 3-2: Installing a Roof mounted Termination . . . . . . . . . . 9 - 10
▪ Roof mounted Terminations
Standard Top Vent (no elbows or offsets) . . . . . . . . . . . . . . . . . . . . 9
Top Vent (two elbows one offset) . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Top Vent (multi-elbows and offsets) . . . . . . . . . . . . . . . . . . . . . . . . 9
Standard Roof Vent (one elbows no offsets) . . . . . . . . . . . . . . . . 10
Section 3-3: Installing a Wall mounted Termination . . . . . . . . . . . . . 11
▪ Standard PTO Installation .............................11
▪ Pre-installed MSR Frame .............................11
▪ Pre-installed BSR Frame ..............................11
▪ Installing MOSR Frame ...............................11
▪ Installing VSS Termination Shield ........................11
▪ Installing PTKOG Heat Guard ..........................11
▪ Section 3-3-1: Venting Layout .........................12 - 13
▪ Top Vent, Wall mounted Graph, H*42DF-ST ................12
▪ Top Vent, Wall mounted termination (one elbow) . . . . . . . . . . . . . . 12
▪ Top Vent, Wall mounted termination (multi elbow) . . . . . . . . . . . . . 12
▪ Side Vent, Wall mounted Termination Graph H*42DF-ST .......13
▪ Side Vent, Wall mounted termination (two elbows) ............13
▪ Section 3-3-2: Venting Components ..........................14
▪ Section 3-3-3: Heat Shields ................................... 15
▪ Installing a RHS8 Wall Mounted Heat Shield ................15
▪ Installing a RHS101 Wall Mounted Heat Shield ..............15
Section 4: Wiring ...........................................16
▪ SIT Proame gas control and pilot .......................16
▪ SIT Nova 820 gas control and pilot ......................16
▪ Honeywell gas control and pilot .........................16
▪ Installing On/Off Wall Switch ...........................17
▪ Installing optional Fan Kit ..............................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
▪ Finishing around the replace ............................19
▪ Mantels and Surrounds .................................19
Section 7: Installing and Removing the Door . . . . . . . . . . . . . . . . . . . . . 20
Section 8: Installing the Accessories . . . . . . . . . . . . . . . . . . . . . . . . 21 - 22
▪ Installing the H42DF-ST Log Set ..........................21
▪ Installing the HL42DF-ST Firestones .......................22
Section 9: Operation ....................................23 - 25
▪ Start-up Sequence with Continuous Pilot ....................23
▪ Start-up Sequence SIT Proame Gas valve ..................24
▪ Start-up Sequence Honeywell Gas valve ....................25
Maintenance .........................................26 - 28
▪ General ............................................26
▪ Cleaning ...........................................26
▪ SIT Hi-Lo Burner Adjustment .............................26
▪ SIT Nova 820 Pilot Burner Adjustment .....................26
▪ Troubleshooting ......................................27
SIT- Nova 820 Gas Control Valve .......................27
SIT Proame Electronic Gas Control Valve ...............27
Honeywell Gas Control Valve . . . . . . . . . . . . . . . . . . . . . . . .27
▪ Replacement Parts ....................................28
Appendix
A. Termination Locations ................................29
B. Warranty ..........................................30
C. State of Massachusetts. ..............................31

Page 3
XG0237 - 120611.1
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.
Address practices that are important, but
not related to personal injury
DANGER WARNING
CAUTION NOTICE
H*42DF ST Indoor Gas Fireplace
Safety Alert Key
Introduction
INTRODUCTION
Congratulations on your purchase of a Montigo Fireplace.
With over 30 years of experience, Montigo is committed to providing
you with a gas replace that is not only a beautiful addition to your
space, but that is also designed and manufactured to the highest
safety, reliability and engineering standards.
We strongly encourage you to read and carefully follow the instructions
laid out in this Installation, Operation and Maintenance Manual
and retain it for your future reference. Pay special attention to all
cautions, warnings, and notices throughout this manual intended to
ensure your safety.
This manual covers installation, operation and maintenance. Lighting,
operation and care of this replace can be easily performed by the
homeowner. All installation and service work should be performed
by a qualied or licensed installer, plumber or gastter as certied
by the state, province, region or governing body where the replace
is being installed.
This installation, operation and maintenance manual is applicable
to the models described below. Refer to your rating plate to verify
included options. Throughout this manual instructions are applicable
to all models designated as H*42DF*-ST unless otherwise noted in
the Table.
Warranty: (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.
H42DFSTN X 37,000 X X
H42DFSTN-I X 37,000 X X
H42DFSTN-F X 37,000 X X
H42DFSTL X 37,000 X X
H42DFSTL-I X 37,000 X X
H42DFSTL-F X 37,000 X X
HL42DFSTN X 37,000 X X
HL42DFSTN-I X 37,000 X X
HL42DFSTN-F X 37,000 X X
HL42DFSTL X 32,000 X X
HL42DFSTL-I X 32,000 X X
HL42DFSTL-F X 32,000 X X
MODEL Natural Gas Liquid Propane Gas Rating (BTU hr) Traditional Burner / Logset Linear Burner w/ Glass Accessories Standing Pilot Ignition Honeywell Hot Surface Ignition SIT Electronic Ignition
WARNING
Hot glass will cause
burns. Do not touch
glass until unit is cooled.
Never allow children to
touch glass.
Irritant
Cutting
Watch your step
Slippery floor
High temperatures
Glass hazard
Danger of suffocation
High voltage
Toxic
Flammable materials
Corrosive
Fork lift trucks
Danger overhead crane
Explosion risk
Oxidising
Danger of death
Biohazard
Laser Radiation
Danger of entrapment
Hot surface
General Warning
Blank
Gas bottles
Watch for
falling objects
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
Low temperature
Strong magnetic field
Optical radiation
Non ionizing
radiation
Radiation
Hazardous to the
Environment
Danger of harming
your hands

H*42DF ST Indoor Gas Fireplace
Page 4 XG0237 - 120611.1
Installation
Installation Checklist
Determine the desired install location of your replace.
See Section 1, Dimensions on Page 5, and refer to the Framing
Section 2 for details.
Select the location of your termination and resulting vent run.
Your selected termination location must be the highest point
in the Direct Vent installation.
Should it be impossible to meet the venting requirements laid
out in Section 3: Venting, please contact a local Montigo dealer
regarding the use of a Montigo Power Vent.
Lay out the Vent run; calculating the required elbows and straight
runs of 5"/8" flex or rigid pipe.
Layout Electrical Requirements Refer to Section 4: Wiring, for
Details.
Refer to Section 5: Installing the Gas Line, for details on the
gas connection and access.
Refer to local codes and guidelines for installation requirements.
Installation and repairs should be done by a qualied
contractor and must conform to:
• Installations in Canada must conform to the local codes or in the
absence of local codes to the current version of Natural Gas and Propane
Installation Code, CSA B149. Electrical Installations must conform to
the local codes or, in the absence of local codes, to the current version
of Canadian Electrical Code, CSA C22.1.1
• Installations in the USA must conform to the local codes or in
the absence of local codes to the current version of National Fuel Gas
Code, ANSI Z223.1/NFPA 54. Electrical Installations must conform to
the local codes or, in the absence of local codes, to the current version
of the National Electrical Code, ANSI/NFPA 70. See Appendix C for
installation within the State of Massachusetts.
IMPORTANT MESSAGE: SAVE THESE INSTRUCTIONS
The H*42DF*-ST Direct Vent replace must be installed
in accordance with these Instructions. Carefully read all the
Instructions in this manual rst. Consult the Local Gas Branch to
determine the need for a permit prior to starting the installation.
It is the responsibility of the installer to ensure this replace is
installed in compliance with the manufacturers instructions and
all applicable codes.
BEFORE YOU START:
Installation and repairs should be done by an authorized gas fireplace service technician.
The appliance should be inspected before use and at least annually by a professional. More
frequesnt cleaning may be required due to exessive lint from carpeting, bedding material,
ect. It is imperative that control compartments, burners and circulating air passageways of
the fireplace are kept clean.
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.
Young children should be carefully supervised when they are in the same room as the
appliance.
Clothing or other flammable materials should not be placed on or near the appliance.
CAUTION
When this appliance is installed directly on any combustible material other than wood
flooring, it must be installed on a metal or wood panel extending the full width and
depth of the appliance or a fire will occur causing serious injury, property damage or
even death.
DANGER

H*42DF ST Indoor Gas Fireplace
Page 5
XG0237 - 120611.1
Installation
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 H*42DF*-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:
Figure 1. Fireplace dimensions (Tolerance ± ⅛").
Top View
Front View
Both Sides Typical
Side View
39 1/2"
OPENING
4
0 1/4"
5 1/4"
6 1/4"
42”
REF.
28 3/4"
OPENING
24”
REF.
37 1/2"
58
40 1
/
2"
FIREBOX
24”
FIREBOX
42”
WIDTH
8
5
7"
43 1/2"
44 1/2"

H*42DF ST Indoor Gas Fireplace
Page 6 XG0237 - 120611.1
Installation
Section 2: Framing
1). Frameintheenclosurefortheunitwithframingmaterials.Theframed
½" high x 24"
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 2. Framing dimensions, (Both Sides Typical).
Figure 4.
Figure 5.
. (Top Vent).
Floor
Combustible
Header
Min. 1”
Ceiling level
Non-Combustible
Header
Non-Combustible
materials. Alcove
over fireplace.
Non-Combustible Nail-
ing Flange, (supplied).
Both sides Typical.
See figure
Top Vent
49½"40½"
10”
6"
Figure 3.
Figure 2.

Tack four studs (Vertical, "broken line") in place, shown inFig 3.

6.
45”(rough opening)
24”
49½”
46½”
Both walls Typical. May
not be exactly as shown.
Combustible material
Backframe, 2-pieces. Both
Sides Typical. See figure 3.
Non-Combustible
headers (Supplied).
45”
PEL Short
90 elbow
C
ombustible material Back
f
rame,
2-pieces. Both Sides Typical
Combustible Header
Non-Combustible Header
Combustible Shelf
50" 46½"
19"
Flex or Rigid
Insulated Sleeve
CRS101
49½”
to 1st combustible
Stud

H*42DF ST Indoor Gas Fireplace
Page 7
XG0237 - 120611.1
Installation
Clearances
When installing a shelf over the top of the replaces, the following
guidelines must be adhered to:
For Side Vent applications, the minimum clearance is 2" from the Side
of the replace to a wall and 12" clearance from the top of the replace
to the underside of any combustible shelf materials.
For Top Vent applications, the minimum clearance is 2" from the Side
of the replace to a wall and 19" to the underside of any combustible
shelf materials.
1” clearance is maintained on sides and bottom of vent runs and 2”
above horizontal vent runs to any combustible material.
H*42DF*-ST 12" 19" 2" 0" 4"
MODEL Top - Side Vent † Top - Top Vent † Side Floor Mantel
Figure 6. Installing the Nailing Flange Extension. Both sides typical.
6"
Installing the Nailing Flange Extension
Once the replace is placed into the rough framed opening, the supplied
Nailing Flange Extension (Part No. H42074) must be fasten securely
into place, with nails or wood screws. as shown in Figure 6.
The Supplied nailing extension must be placed along the top edge of the
replace and securely fastened in place to the non combustible header
and combustible wood framing.
Note: The nailing ange extension can be substituted with a piece of
NON-Combustible material of the same size and thermal characteristics,
ie: cement board or equivalent. This is recommended in applications
where the facing materials will not adhere to the metal nailing ange.
† Note: Clearance from top of replace to a combustible ceiling within
the replace enclosure.

H*42DF ST Indoor Gas Fireplace
Page 8 XG0237 - 120611.1
Installation
Section 3: Venting
Figure 7. Flue cover and collar removal, Top Vented replace.
Figure 7a. Flue cover and collar installation, Side Vented replace.
Section 3-1: CONVERTING TO Side VENT
Use the following instructions to convert a H*42DF*-ST for Side Vent use:
1. Remove the Side ue cover and gasket (5" and 8") on the ue
outlet, as shown in Figure 7.
2. Next, Remove the Top ue collar's (5" and 8") on the ue outlet,
as shown in Figure 7.
3. Install the (removed) Side ue cover and gasket material, to the
Top vent outlet. Fasten the cover with included hardware, as
illustrated Figure 7a.
4. Install the (5" and 8") collars to the Side vent outlet using the
included hardware, as illustrated Figure 7a.
Montigo supplies a variety of direct venting and termination options.
The direct vent termination location MUST be selected such that
it is the highest point in the venting assembly. It should also be
selected such that it provides the shortest vent run possible. Should
it be impossible to ensure that the termination is the highest point or
should it be impossible to meet the venting guidelines laid out below
please contact your Montigo dealer to discuss power venting options.
NOTES FOR PLANNING VENTING:
Venting originates from the unit through the top or through
the side
Venting can terminate through the roof or through an
exterior wall.
 Refer to Appendix A - Termination Locations to ensure the
planned termination location is acceptable.
Once the termination location has been established, refer
to the appropriate section below for installation details
All replaces shipped from the factory are Top vent.
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

H*42DF ST Indoor Gas Fireplace
Page 9
XG0237 - 120611.1
Installation
Section 3-2: INSTALLING A ROOF MOUNTED DIRECT VENT
TERMINATION (PVTK-1)
This section applies to installations where the direct vent termi-
nation will be roof mounted.
Section 3-2-1: VENTING LAYOUT
Selection of components and details of venting lay out should
adhere to the following guidelines:
The maximum termination point is 32’ above the replace (NOTE:
if the maximum termination height is used, the ame pattern
may be affected).
The Vertical termination must be a minimum 2’ higher than where
the termination exits the roong materials, (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 8 to 8c).
Termination location must be a minimum 6’ from a mechanical
air inlet.
Termination location must be a minimum 18” from a parapet wall.
For a more detailed diagram of allowed termination locations,
see Appendix A.
A maximum of two offsets (each offset is made up of 2-90°
bends) may be made.
Firestops must be installed as required by National & local codes.
Ensure all runs are supported with a minimum of 3 supports
per 10’ of venting.
Install all roof ashing and storm collars as shown.
Figure 8. Top vent, Roof mounted termination with no offset in vent run.
Figure 8a. Top vent, Roof mounted with 1 offset (1 offset= two 90° bends).
Figure 8b. Top vent, Roof mounted with 2 offsets (1 offset= two 90° bends).
Roof mounted Terminations
The following details are some possible congurations for Roof
mounted terminations. See below.
PVTK1 Termination
PVTK1 Termination
PVTK1 Termination

H*42DF ST Indoor Gas Fireplace
Page 10 XG0237 - 120611.1
Installation
Figure 8c. Side vent, Roof mounted venting (1 = 90° bend).
PEXT
Solid Sectio
n
PVTK1 Termination
12” Max.

H*42DF ST Indoor Gas Fireplace
Page 11
XG0237 - 120611.1
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.
1). Installation of Termination with built in frame
A Termination with a Built-In Frame is installed during framing of a structure.
1. Frame the termination opening to 11" x 11".
2. Install exterior sheathing to the structure framing.
3. Fasten the termination to the sheathing using a minimum of 4 screws.
MSR Frame
PTO-4 (5"/8")
Termination
PTO-4F (5"/8")
Termination
Figure 9. Installing a PTO-4F termination.
Figure 9a. Installing a PTO termination with the MSR frame.
Figure 9d. Installing the VSS Vinyl Shield.
5). Installation of a termination shield for Vinyl Siding
The VSS Termination shield is installed when the exterior of a structure
is clad with Vinyl siding. It is placed directly above, and on-center with
the termination.
2). Installation of termination frame at time of framing
Terminations with a MSR frame allow the installation of the frame prior
to installation of the termination.
1. Frame the termination opening to 12" x 12".
2. Secure the MSR Frame to the exterior sheathing of the structure.
3. Fasten the termination to the MSR Frame using a minimum of 4 screws.
Figure 9b. Installing a PTO termination with the BSR frame.
3). Installation of termination frame at time of framing in Masonry
Terminations with a BSR frame allow the installation of the frame in
masonry prior to the installation of the termination
1. Frame the BSR opening to 12" x 12".
2. Secure the BSR Frame to the exterior sheathing of the structure.
1. Frame the MOSR opening to 12" x 12".
2. Fasten the MOSR frame to the interior side of the studs, concrete,
or nished wall construction using a minimum of 4 screws.
3. Insert the termination into the MOSR frame as shown here, (from
the inside) and attach to the MOSR by installing a min. quantity of
4 bolts into the threaded nuts on the MOSR Frame.
4). Installation of termination from inside structure
A Termination with a MOSR Frame is installed from the inside of the
structure. These are commonly used in high-rise construction.
MOSR Frame
PTO-4 (5"/8")
Termination
Figure 9c. Installing a PTO termination with the MOSR frame.
BSR Frame
PTKOG (5"/8")
Installing Heat Guards over Terminations is recommended
in installations where the termination is located within 7' feet above
grade, or above a pedestrian walkway, and may be Required by code
in Public areas.
1. Ensure that the two long mounting brackets are facing the bottom
of the termination. (See inset). This will provide more heat protection
at the top of the termination, where temperatures are highest.
2. Attach to the faceplate of the termination using four sheet metal
screws.
Figure 10. Installing a PTO termination heat guard.
1
1”
11”
Framing
Exterior
Sheathing
Fastening Hardware,
minimum 4-screws
Framing
Exterior
Sheathing
Fastening Hardware,
minimum 4-screws
PTO-4 (5"/8")
Termination
Framing
Exterior
Sheathing
Fastening Hardware,
minimum 4-screws
12”
12”
Fastening Hardware,
minimum 4-screws
Framing, con-
crete or other
materials
Exterior Sheath-
ing, concrete or
other materials
Exterior Vinyl
siding
PTO-4 (5"/8")
Termination
VSS Vinyl shield

H*42DF ST Indoor Gas Fireplace
Page 12 XG0237 - 120611.1
Installation
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 11 with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 120" and the horizontal
run to the wall ange of the vent termination is 138", this would be
an acceptable installation.
Example B: (Unacceptable Installation)
If the vertical dimension from the hearth is 48" and the horizontal
run to the wall ange of the vent termination is 96", this would
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.
Figure 11. HL42DF*-ST Top Vent Venting Graph for wall mounted terminations.
Figure 11a. Top Vented, wall mounted installation with one 90° bend. The vent
run must comply with Venting Graph for Top vent, wall mounted terminations,
Figure 11.
Figure 11b. Top Vented, wall mounted Multi-elbow installation. See Venting
Graph for Top vent, wall mounted terminations, Figure 11.
Section 3-3-1: VENTING LAYOUT: Wall mounted termination.
Selection of components and details of venting layout should
adhere to the following guidelines:
Vent terminations must not be recessed in walls or siding.
For Heat Shield requirements see Section 3-3-3 on page 15.
Once the proposed venting layout has been determined refer to
Figure 11 or 12 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 11.
50”
36” NG12” LP
Unacceptable vent run
within shaded area.
Acceptable vent run
within non-shaded area.
A
B
C
If your isnstallation does not fall
within the venting parameters,
please contact local Montigo dealer
for Power Venting options.
Heat Shield
Flex or Rigid
Insulated Sleeve
CRS101
Termination
Exterior
Wall
Hearth
36" MAX NG
12" MAX LP
50"
Solid Section
Flex Section
Hearth
Heat
Shield
Termination
Exterior
Wall
.
150" MAX
Solid Sectio
Flex Section
Hearth
Exterior
Wall
Termination
Heat
Shield
126"
30" MAX
Figure 11c. Top Vented, wall mounted Retracted Multi-elbow installation. See
Venting Graph for Top vent, wall mounted terminations, Figure 11.

H*42DF ST Indoor Gas Fireplace
Page 13
XG0237 - 120611.1
Installation
Figure 12. Side Vent Venting Graph for wall mounted terminations.
Figure 12a Side Vented, wall mounted Multi-elbow termination installation.
The vent run must comply with the Venting Graph for Side vent, wall mounted
terminations, Figure 12.
Notes Wall Mounted Terminations: SIDE VENT
SIDE VENTED INSTALLATIONS MUST BE MULTI ELBOW
SIDE VENTED INSTALLATIONS MAY NOT TERMINATE
STRAIGHT THROUGH THE WALL.
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 12.
Fireplace must be converted to Side Vent conguration prior to
running vent, see Figure 7 and 7a.
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 12 with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 120" and the horizontal
run to the wall ange of the vent termination is 138", this would be
an acceptable installation.
Example B: (Unacceptable Installation)
If the vertical dimension from the hearth is 48" and the horizontal
run to the wall ange of the vent termination is 96", this would be
this 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.
WARNING:
An inspection of the explosion relief appers and door
MUST be made prior to lighting the replace. A faulty seal
on the door gasket and/or explosion ports will result in
products of combustion leaking into the living space and
may result in carbon monoxide poisoning.
30” Max.
12”
Max.
Flex or Rigid
Section
14 1/2”
Min.
Hearth
37"
52" Min
52”
42”
Unacceptable vent run
within shaded area.
Acceptable vent run
within non-shaded area.
A
B
C
If your isnstallation does not fall
within the venting parameters,
please contact local Montigo dealer
for Power Venting options.

H*42DF ST Indoor Gas Fireplace
Page 14 XG0237 - 120611.1
Installation
A - Termination PTO-4 (3" Length)
PTO-4F (3" Length)
PVTK-1
B - Frame Kits MSR (Stucco Frame)
MOSR (Stucco Frame)
BSR-4 (4" Brick Frame)
BSR-6 (6" Brick Frame)
C - Flex Sections PFL - 1 (12" f/f Section)
PFL - 18 (18" f/f Section)
PFL - 2 (24" f/f Section)
PFL - 3 (36" f/f Section)
PFL - 4 (48" f/f Section)
PFL - 6 (72" f/f Section)
D - Rigid Sections PXT - 5 (5" f/f Section)
PXT - 10 (10" f/f Section)
PXT - 20 (20" f/f Section)
PEXT - 1 (12" f/m Section)
PEXT - 2 (24" f/m Section)
PEXT - 3 (36" f/m Section)
PEXT - 4 (48" f/m Section)
PEXT - 6 (72" f/m Section)
E - Elbows PEL-90MM (m/m 90º Elbow)
PEL-90FF ( f/f 90º Elbow)
PEL-90FM ( f/m 90º Elbow)
PEL-45FM ( f/m 45º Elbow)
F - Support Ring & Plate PSPXT-8
G - Firestop FS-8
H - Roof Flashing PRF-7 (1/12 - 7/12 pt.)
PRF-12 (7/12 - 12/12 pt.)
I - Heat Shield RHS101
J - Heat Guard PTKOG
Connection and installation of the vent components should
adhere to the following guidelines:
Montigo recommends the use of a ex section for the nal pipe
connected directly to the replace offering greater exibility of
installation and absorption of movement.
Firestops must be installed as required by National & local codes.
Montigo recommends that all exterior corners and joints be sealed
with exterior caulking. However, we encourage you to consult
your Building Envelope Engineer or Waterproong Consultant
for further recommendations.
Section 3-3-2: VENTING COMPONENTS
The following components and associated Montigo part numbers for
installation of a roof or wall mounted termination. Use only Montigo
Vent Components. Use of non-Montigo parts will VOID the warranty
and may impede operation of the replace.
Use any combination of rigid and ex pipe as required and in
any orientation (Male connectors can face in any direction).
Flex sections may be stretched up to 50% of their total length
(e.g. a 24” section maybe stretched to 36”).
Connect all vent sections using a minimum of three sheet metal
screws on the outer pipe ue.
Ensure the pipe ends male to female slide in a minimum of 1
1/2” of overlap.
Ensure all runs are supported with a minimum of 3 supports
per 10’ of venting.
When hanging/ supporting venting, ensure that 1” clearance
is maintained on sides and bottom of vent runs and 2” above
horizontal vent runs to any combustible material.
Rigid pipe may be cut less than half way from the female end only.
Ensure when cutting sections of rigid pipe to maintain integrity
of internal supports.
Place the springs, supplied with the pipe kit, between the outer
and inner pipes to keep the pipes separate and avoid any
possible hot spots.
IMPORTANT:
Please Refer to your Building Envelope Engineer
or Waterproong Consultant for a review of ALL
penetrations through exterior walls or the roof.

H*42DF ST Indoor Gas Fireplace
Page 15
XG0237 - 120611.1
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 13a). For applications within
these dimensions the RHS101 Heat Shield MUST be used.
To install the RHS8, frame an opening in combustible construction,
Figure 13 below. Slide the Heat shield in place over the vent pipe
which attaches to the replace. After the replace and vent pipe has
been installed, clearances should match the dimensions in Figure 13.
Figure 13. RHS8 Installation. (Install by sliding over vent pipe where it passes
through the combustible construction).
Figure 13a. RHS8 Installation. (Minimum requirements).
Figure 14. RHS101 Installation. (Install by sliding Outer Section over
vent pipe where it passes through the combustible construction.
Figure 14a. Heat Shield. After sliding the outer section in place.
Figure 14b. RHS101 Installation.
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
12” x 12”
Inner Shield 9 3/8”
Installing a Wall Mounted RHS101 Heat shield.
The RHS101 Heat shield MUST be used where the Termination falls
within 36" horizontal or 60" vertically from the replace. (Figure 13a)
Use the RHS102 where the termination is closer to the replace than
58" horizontally. 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
14. To complete the installation fasten the Heat Shield Outer Section &
Termination frame to the structure Figure 14a.
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
RHS8 Heat
Shield
36” Min
60” Min.
Termination

H*42DF ST Indoor Gas Fireplace
Page 16 XG0237 - 120611.1
Installation
Models Included
H42DFSTN-F
H42FSTL-F
HL42DFSTN-F
HL42FSTL-F
Models Included
H42DFSTN-I
H42DFSTL-I
HL42DFSTN-I
HL42DFSTL-I
Section 4: Wiring
Figure 15. Wiring Diagram for the SIT Proame Electronic Ignition
Figure 17. Wiring with Honeywell gas control and pilot.
Honeywell (Q3450)
Pilot Assembly
Pilot Electrical
Harness Connector
Honeywell Gas
Control (SV9501M)
Gas Control
Connector
Junction Box
115VAC
24VAC
40 VA
Transformer
Black
White
Green
Gnd Screw
Wall Switch
Fan Plug
Receptacle
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 16. Wiring Diagram for SIT Nova 820 gas and pilot.
Orange Green
Red
Black
880 Valve
Battery
Holder
4 x 1.5V
AA Type
Chassis
connection
120 Vac INPUT
7 Vdc STABILIZED
SUPPLY OUTPUT
ON / OFF
ON/OFF IPI/CPI
BATTERY
DC SUPPLY
VALVE
GROUND
DFC
(CPI / IPI MODE
Not Used)
Models Included
H42DFSTN
H42DFSTL

H*42DF ST Indoor Gas Fireplace
Page 17
XG0237 - 120611.1
Installation
Installations in the USA which employ the fans must be grounded in
accordance with local codes or, in the absence of local codes, with the
National Electrical Code, ANSI/NFPA 70.
For more information see the Fan Kit Installation Guide included with
the fan kit.
NOTE: If any of the original wire supplied with the appliance is replaced, it
must be replaced with the same type, or its equivalent.
Figure 18. Wiring diagram for optional fans.
G
L2-WH
L1-BLK
p g
Quick Connect
lu to motor
5/1/60 Supply
G L1 L2
Wiring for the optional Fan Kit
All H*42DF*ST replaces may be equipped with optional fan kits for
circulating heat into the living space.
Installations in Canada which employ the fans must be electrically
grounded in accordance with CSA C22.1 Canadian Electrical Code
Part 1 and/or Local Codes.
Installing the remote On/Off Wall Switch
The H*42DF*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 15, 16, or 17 for wiring requirements.
NOTE: The switch location must not exceed 30' from the replace.

H*42DF ST Indoor Gas Fireplace
Page 18 XG0237 - 120611.1
Installation
Section 5: Installing the Gas Line
Ø 1 3/4”
16 1/4” 8 1/4”
2 3/4”
Gas Access 3”x 2”
Rectangle Opening
Section 5-1: FUEL CONVERSION
Verify that your replace is compatible with your available gas
type. (Natural Gas or Propane shown by "N" or "L" in your
model number
If gas type is not compatible, contact your local Montigo
representative to purchase a conversion kit.
Conversion kits must be installed by a qualied service technician.
Section 5-2: GAS PRESSURE
Optimum appliance performance requires proper input pressures.
Gas line sizing requirements will be determined in ANSI Z221.3
National Fuel Gas Code in the USA and CAN/CGA B149 in
Canada.
Pressure requirements are:
Gas Pressure Natural Gas Propane
Minimum inlet pressure 5.5in. w.c. 11in. w.c.
Manifold pressure 3.5in. w.c. 10in. w.c.
Note: After gas line is connected, each appliance connection,
valve and valve train must be checked while under normal
operating pressure with either a liquid solution, or leak
detection device, to locate any source of leak. Tighten any
areas where bubbling appears or leak is detected until
bubbling stops completely or leak is no longer detected.
DO NOT use a ame of any kind to test for leaks.
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 19 below for location of gas line access.
Flexible gas connectors must not exceed 3 feet in length, unless
allowable within local regulations.
Connect incoming gas line to the 1/2"or 3/8" gas inlet port.
Purge all air out of gas line.
Check appliance connection, valve and valve train under normal
operating pressure with a commercially available leak check
solution.
DO NOT USE A FLAME OF ANY KIND TO TEST FOR LEAKS.
Figure 19. Gas line access.
We recommend careful consideration be given to the effects of elevated mantel
temperatures which may be in excess of product design, for example: candles, plastic
or pictures. This can cause melting, deformation, discoloration or premature failure of
T.V. radio, and other electronic components.
CAUTION
When pressure testing the fireplace, Gas line, and input system follow the appropriate
local codes or your area. DO NOT connect the fireplace to pressures in excess of
1/2lb. This will damage the gas control valve.
NOTICE

H*42DF ST Indoor Gas Fireplace
Page 19
XG0237 - 120611.1
Installation
Section 6: Finishing
6”
6”
3
”
Drywall/
Sheetrock
Non-Combustible
Header
Non-Combustible
Facing Material
Figure 20. Combustible mantels and facings.
Finishing Around the Fireplace
Combustible mantels and mouldings may be safely installed over the
top and on the front of the replace provided that they do not project
beyond shaded area shown in Figure 20.
Fireplace Facing
When sizing the nish material for your replace, it is important to
remember the following: THE OPENING MUST NOT BE OBSTRUCTED
IN ANY WAY - to do so restricts the air supply for the control
compartments and heat exchanger it also prevents access for
servicing controls.
The face of the replace may be painted to match the room decor,
provided you use a heat-resistant paint. Decorative facing must not
extend past the replace opening at all, because it will interfere with
the access to retainers for removal of glass door.
Mantels & Surrounds
NOTE: National Canadian Gas Association mantel test requirements
are for re hazard prevention to combustible materials.
New technology, to meet consumer and government demands for the
wise use of energy, has prompted us to manufacture many models of
replaces which are hot, fuel and energy efcient.
Please be aware; temperatures over the mantel will rise above normal
room temperature and walls above replace may be hot to touch.
Side wall clearances are 3". Combustible surrounds may be installed
with 3" clearance to the side of the replace as shown in Figure 21.
Do not operate this fireplace without the glass door or with a broken glass door.
NOTICE
Do not use ammonia based or abrasive cleaners on the glass, they will permanently
etch the surface. Use an approved gas fireplace glass cleaner such as Kel-Kem or
White off.
NOTICE
Figure 21. Combustible surrounds. Typical both sides.
WARNING!
We recommend careful consideration be given to the effects of
elevated mantel temperatures which may be in excess of product
design, for example: candles, plastic or pictures. This can cause
melting, deformation, discolouration or premature failure of T.V.
radio, and other electronic components.
WARNING!
When covering the upper metal portion of the replace, up to 4"
(as shown, Fig.20) with a non-combustible material Please Note:
The decorative facing materials may be subject to temperatures
in excess of 250° F. This should be considered when selecting
facing materials.
Top of fireplace
Non-Combustible
Combustible Facing
Material
Facing Material
Steel Stud construction only
allowed within the grey area
Horizontal Run (in.)
Vertical Height (in.)
NON-Combustible
Header
1st combustible header
Combustible Construction
allowed in shaded area

H*42DF ST Indoor Gas Fireplace
Page 20 XG0237 - 120611.1
Installation
Section 7: Installing & Removing the Door
Removing the door:
The H*42DF*-ST doors are removed in a few simple steps. Follow these
instructions below to remove the Horizontal access panel, unlatch the
door buckles and remove the door. Replace in reverse order.
Figure 22a. Locate the door buckles. (Both Sides Typical)
Figure 22. Removing and installing the Horizontal Access Panel
Locate the Door Buckles:
Step 2:
Step 1:
Remove the Horizontal cover
by placing ngers in both nger
holes, then pushing away from
you and lifting out. Place it
aside during maintenance or
cleaning.
Install in reverse order.
Remove the Horizontal Access Panel:
To install the door, hook the top edge of the door frame into place. Lower
the door into position and follow the previous steps shown in reverse order.
Installing the Door:
2
Step 5:
Ensure the tool is rmly
in the lower end of the
slot, (as shown), Then pull
toward you (Caution: hold
the tool securely).
3
Step 6:
Pull hard if necessary to
release the spring ten-
sion. (Caution: The latch
springs back with force,
hold the tool securely).
4
Step 7:
Remove the tool from
the latch slot. Ensure the
latches are hanging freely,
the hook end is released
from the bottom of the door.
(Repeat all 4-steps for the
remaining latches).
Figure 22d.
Figure 22e.
Figure 22f.
Step 8:
Grasp the Door on either side, usually midway and lift upward, lift
the door carefully up and away from the front of the replace. See
Figures 22g. Place the Door aside in a safe place while maintenance
and / or cleaning is being performed.
Figure 22g. Removing and installing the glass doors. (Both Sides Typical)
Removing the Door:
Door Latch Hook
Door Latch Slot
Hand-hold
Release the Door Buckles
Figure 22b. Door buckle Tool
1
Step 4:
Firmly grasp hand-hold
end of Door buckle tool
and place the machined
end in the slot under door
frame. (as shown)
Figure 22c.
Step 3:
Finger Holes
Installed Gas
Valve Cover