Montigo R320STN Instruction Manual

XG0231 - 061120
Installation & Maintenance Manual
• Theinstallationofthisreplacemustbedonebya
qualiedandcertiedgasapplianceinstaller.
• Checklocalcodesandreadallinstructionspriorto
installation.
®
C
US
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury,
death, or property damage.
—Donotstoreorusegasolineorotherammablevaporsand
liquidsinthevicinityofthisoranyotherappliance.
— WHAT TO DO 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.
• Leavethebuildingimmediately.
• Immediatelycallyourgassupplierfromaneighbour's
phone. Follow the gas supplier’s instructions.
• Ifyoucannotreachyourgassupplier,callthere
department.
—Installationandservicemustbeperformedbyaqualied
installer,serviceagencyorthegastter.
Exemplar See-Through
INDOOR DIRECT VENT GAS FIREPLACE
R320STN 45,000 BTU/hr NG
R320STL 42,000 BTU/hr Propane
R420STN 55,000 BTU/hr NG
R420STL 55,000 BTU/hr Propane
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 qualied installer, service agency or the gas supplier.
A barrier designed to reduce the risk of burns from the
hot viewing glass is provided with this appliance and
must be installed for the protection of children and
other at-risk individuals.
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
Installation and service must be performed by a qualied installer,
service agency or the gas tter.
Installer: Leave this manual with the appliance.
Consumer: Retain this manual for suture reference.
NOTICE
CAUTION
DANGER
DANGER
Some materials used in the manufacturing process of this product can
expose you to Benzene which is known in the State of California to
cause cancer and birth defects or other reproductive harm. For more
information go to www.P65warnings.ca.gov
WARNING
R520STN 80,000 BTU/hr NG
R520STL 80,000 BTU/hr Propane
R620STN 100,000 BTU/hr NG
R620STL 100,000 BTU/hr Propane

XG0231 - 0611202
General
Congratulations on your purchase of a Montigo Fireplace.
With over 30 years of experience, Montigo is committed to providing
you with a gas fireplace 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 in Table 1. Refer to your rating plate to
verify included options.
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.
MODEL Natural Gas Liquid Propane Gas Rating Linear Burner w/ Glass Accessories
HSI Electronic Ignition/ SIT
Electronic Ignition (IPI)
R320STN X 45,000 X X
R320STL X 42,000 X X
R420STN X 55,000 X X
R420STL X 55,000 X X
R520STN X 80,000 X X
R520STL X 80,000 X X
R620STN X 100,000 X X
R620STL X 100,000 X X
Introduction
Safety Alert Key
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, WILL result in minor or moderate
injury.
Indicates a hazardous situation which, if not
avoided, COULD result in death or serious
injury or property damage.
Indicates practices that are important, but
not related to personal injury.
DANGER
CAUTION
WARNING
NOTICE
Figure 1 Exemplar See-Through Specications
Vented decorative gas appliance:
not a source of heat; not for use with solid fuel
NOTICE

XG0231 - 061120 3
General
Contents
Safety Alert Key.................................................................................................. 2
Introduction ....................................................................................................... 2
Section A: Before You Begin ......................................................................................... 4
Installation Checklist........................................................................................................ 4
Standard Installation Checklist...................................................................................... 5
Rating Plate Sample ......................................................................................................... 6
Section 1: Product Dimensions......................................................................... 7
R320ST*, R420ST*, R520ST*, R620ST* Dimensions............................................... 7
Section 2: Framing ............................................................................................. 8
Clearance Requirements:............................................................................................... 8
Framing ............................................................................................................................... 8
Installing the Fireplace .................................................................................................... 9
Back framing the Fireplace............................................................................................. 9
Section 3: Venting ............................................................................................ 10
Section 3-1: Converting to Rear Vent .......................................................................10
Section 3-1-1: Converting the Flue.............................................................................10
Section 3-1-2: Converting the Pressure Sensing Tube and Air Baffle ...............11
Section 3-2: Installing a Roof Mounted Vent System.................................. 12
Straight Venting Layout.................................................................................................12
Multi-Elbow Installations...............................................................................................12
Downward Vertical Venting..........................................................................................12
Section 3-3: Installing a Wall Mounted Vent System ................................... 13
One Elbow Layout ..........................................................................................................13
Multi-Elbow Installations...............................................................................................13
Downward Vertical Venting..........................................................................................13
Section 3-3-2: Venting Components..........................................................................14
Section 3-3-3: Heat Shields.............................................................................. 15
Section 4: Wiring .............................................................................................. 16
Installing the Fireplace Control Box...........................................................................16
Installing the Wall Switch ..............................................................................................16
Electrical control panel..................................................................................................17
Section 5: Installing the gas line..................................................................... 18
Fuel Type...........................................................................................................................18
Gas Pressure ...................................................................................................................18
Section 5-3: GAS CONNECTION..................................................................................18
Section 6: Testing the system......................................................................... 19
6-1: Testing the system before gas connection......................................................19
6-2: Testing the system with gas connection (Highly recommended)...............19
Section 7: Finishing the fireplace................................................................... 20
R320, R420 Finishing the Fireplace............................................................................ 21
R520, R620 Finishing the Fireplace............................................................................ 21
Mantels & Surrounds .................................................................................................... 22
Section8:Removing&InstallingScreenandWindow ................................ 23
Removing the Screen..................................................................................................... 23
Removing the Window .................................................................................................. 23
Reinstalling the door...................................................................................................... 23
Section 9: Installing the Accessories.............................................................. 24
Installing the Firestones or optional Fireglass ........................................................ 24
Installing Optional River Rocks ................................................................................... 24
Section 10: Cleaning and Maintenance ........................................................ 26
General ............................................................................................................................. 26
Cleaning ............................................................................................................................ 26
Procedure for Checking Calibration of Flue Gas Switch ....................................... 26
Replacement Parts .......................................................................................... 27
Appendix A: Power Vent Locations................................................................ 28
PVVEX510-300 Vertical Power Vent Detail ............................................................... 28
Unacceptable Install ...................................................................................................... 28
PVHIN58-300 Inline Power Vent with TMHIN58-40 Detail ................................... 28
PVVEX510-300 Power Vent Locations....................................................................... 29
PVHEX510-300 Horizontal Power Vent Detail......................................................... 31
PVHFL510-300 Horizontal Power Vent Detail ......................................................... 31
Appendix B: Warranty ..................................................................................... 34
Appendix B: Warranty Continued .................................................................. 35
Appendix C: Amendment ................................................................................ 36
(Gas Fireplace / Equipment sold in the State of Massachusetts) 5.08: Modifica-
tions to NFPA-54, Chapter 10...................................................................................... 36
Section 3-3-2.2: Simpson Duravent Venting Components .................................. 39
Section 3-3-2.3: ICC Venting Components*............................................................. 40
Section 3-3-2.4: Metalfab Venting Components* .................................................. 40

XG0231 - 0611204
General
IMPORTANT MESSAGE: SAVE THESE INSTRUCTIONS
The Exemplar replaces 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.
Installation Checklist
• Determine the desired install location of your replace.
• See Section 1, Dimensions and refer to the Framing Section 2 for
details.
• Select your type and location of your Power Vent run: Roof Mounted
PVVEX510-300, External Wall Mounted PVHEX510-300, Flush Louver
Wall Mounted PVHFL510-300.
• Your termination location should be selected to provide the most
ecient vent run.
• Lay out the Vent run; calculating the required elbows and straight
runs of 5"/10" ex and/or rigid pipe. (5"/8" for R320 and R420)
• Refer to the Section 3, "Venting" for details.
• Montigo supplies 20' of low voltage wire, which can be spliced to a
maximum of 100' with wire of equal quality. This wire CANNOT run
in conduit with any other wire.
• Refer to Section 4, for Wiring Details.
• The gas connection is located on the bottom right side (pilot burner
side) of the replace.
• Refer to local codes and guidelines for installation requirements.
• Refer to Section 5, "Installing the Gas Line" for details.
• 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.
Do not use this appliance if any part has been under water.
Immediately call a qualied service technician to inspect the appliance
and to replace any part of the control system and any gas control that
has been under water
Due to high temperatures, the appliance should be located out of
trac and away from furniture and draperies
Children and adults should be alerted to the hazards of high surface
temperature and should stay away to avoid burns or clothing ignition
A barrier designed to reduce the risk of burns from the hot viewing
glass is provided with this appliance and shall be installed for the
protection of children and other at-risk individuals
Clothing or other ammable material should not be placed on or near
the appliance
Installation and repair should be done by a qualied service person.
The appliance should be inspected before use and at least annually
by a professional service person. More frequent cleaning might be
required due to excessive lint from carpeting, bedding material, etc. It
is imperative that control compartments, burners, and circulating air
passageways of the appliance be kept clean
NOTICE
NOTICE
NOTICE
NOTICE
NOTICE
NOTICE
Section A: Before You Begin

XG0231 - 061120 5
General
Standard Installation Checklist
This standard installation checklist is to be used by the installer in conjunction with, not instead of, the instructions contained within this
installation manual.
Customer Date Installed:
Install Address: Location of Fireplace:
Installer:
Model (circle one): R320STN, R320STL, R420STN, R420STL, R520STN,
R520STL, R620STN, R620STL
Dealer Phone:
Serial #:
YES NO IF NO, WHY NOT?
Appliance Install: Section 2
Framing complies with install manual.
Standos have been installed.
Proper clearances have been maintained.
Venting: Section 3
Venting conguration complies with vent diagrams.
Venting installed, fastened, and secured in place maintaining proper clearance.
Firestops installed.
Exterior wall/roof ashing installed and sealed in compliance with local building code.
Terminations installed and sealed in compliance with local building code.
Direct vent termination is highest point in vent assembly.
Wiring/Electrical: Section 4
Unswitched power provided to the appliance PPO box.
Low voltage wire connected to dry contact wall switch (non-powered)*
Gas: Section 5
Proper appliance for fuel type.
Was a conversion performed?
Leak check performed & inlet pressure veried.
Finishing: Section 6
Only non-combustible materials installed in non-combustible areas.
Clearances meet installation manual requirements
Mantels and/or projections comply with install manual
Appliance Setup: Section 7 through 9
Media, door, and screen installed according to install manual
Manual given to home owner.
Started appliance and veried no gas leaks exist.
Comments:

XG0231 - 0611206
General
Rating Plate Sample
Figure 1.b Rating Plate for R720 Figure 1.c Rating Plate for R820
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LBL1207D-V5.1 R(P)VIEW_HSI_WITH SCREEN _AUG.17.2015
  
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 



    






 
 
 


 






 












LBL1207D-V5.1 R(P)VIEW_HSI_WITH SCREEN _AUG.17.2015
  










  

    




  

  


  



    






 
 
 


 




XG0231 - 061120 7
General
R320ST*, R420ST*, R520ST*, R620ST* Dimensions
Figure 2. Fireplace dimensions (Tolerance ± ⅛").
Figure 2.b Control Box Dimensions (Tolerance ± ⅛").
Section 1: Product Dimensions
11
7
8
"
303
10"
255
31
4
"
82
11 1
2
"
292
71
4
"
186
53
4
"
148
13
8
"
34
95
8
"
244
11 7
8
"
303
10"
255
31
4
"
82
11 1
2
"
292
71
4
"
186
53
4
"
148
13
8
"
34
9
5
8
"
244
11 7
8
"
303
10"
255
31
4
"
82
11 1
2
"
292
71
4
"
186
53
4
"
148
13
8
"
34
95
8
"
244
11 7
8
"
303
10"
255
31
4
"
82
11
1
2
"
292
71
4
"
186
53
4
"
148
13
8
"
34
95
8
"
244
A
H
I
O
J
K L
N
M
P
Q
R
S
T
B C
D E F
G
G
A B C D E F G H I J K L M N O P Q R S T
R320  8 5                  
R420  8 5                 
R520  10 5                
R620  10 5                  

8
Installation
XG0231 - 061120
Q (Opening) both sides typical
R (Opening)
both sides typical
U
3/4”
Plywood
Platform
Section 2: Framing
When constructing the framed opening, please ensure there is access
to install the gas line when the unit is installed.
Figure 3.f Fireplace installation, (Rough Frame-In dimensions).
NOTICE
¾"
Plywood
Platform
A
B
C
Clearance Requirements: Framing
MODEL Top Sides Floor Mantel
R320ST 26" 3" 0" See Section 6 Finishing around the replace
R420ST 26" 3" 0" See Section 6 Finishing around the replace
R520ST 26" 3" 0" See Section 6 Finishing around the replace
R620ST 26" 3" 0" See Section 6 Finishing around the replace
NOTES:
† Clearance from top of replace to a combustible ceiling within
the replace enclosure. Unprotected combustible walls which are
perpendicular to the replace opening must maintain 6" clearance,
see gure 3.
Figure 3. Combustible Wall Clearances
To ensure the replace operates safely, all models must maintain the
following clearances:
Determine the height of the platform based on where you want the
bottom edge of the glass to be, see gure 2 for unit dimensions.
Maintain minimum ceiling height shown in table. Build replace frame
as shown in gure 3.f
Framing Dimensions
Model A B C
R320ST 56¾" 52½" 23¾" †
R420ST 68¾" 52½" 23¾" †
R520ST 78" 50" 23¾" †
R620ST 90" 50" 23¾" †
Max. Platform
Height
Min. Required
Ceiling Height
24" 8'
48" 10'
1. You will need to construct a platform in the framing for the replace to sit on.
To determine how high to build the platform you must determine the how
high you would like the bottom edge of your glass viewing area to be. The
bottom edge of the glass sits 15 1/8" above the top of the platform. Please
note: The top of the platform may not exceed 24" in a room with 8' ceilings.

9
Installation
XG0231 - 061120
Installing the Fireplace
Back framing the Fireplace
Figure 3.g Fireplace installation, (Inlet Gas & Power Vent).
Figure 3.h Completed back frame Fireplace installation
Maintaina1"clearancearoundthethroat(projection
atthefrontofthereplacethatholdstheglassdoor)
wheninstalling2x4sforbackframing.
Intake / Exhaust
Vent Pipe (5”/8”)
2-pcs 2 x 4 (vertical)
Both Sides Typ.
1"
1"
2 x 4 (Top,
horizontal)
2 x 4 Vertical
llers. Use
typical
building
practices
when spacing
2 x 4 (Bottom,
horizontal)
RHS 102
Steel header
(supplied by Montigo)
Supply Gas
connection
2"
½"
2"
3. Back -frame in the fireplace
using typical framing practice,
see Figure 2 on both sides and
meeting clearance requirements
shown on page 5. Install the non-
combustible headers supplied by
Montigo above the replace on
both sides as required to attach
facing. For cleanest nish ensure
that the facing material isinstalled
ush to the glass viewing area.
4. Cut the Upper and Lower
Horizontal 2 x 4's as shown in
Figure 2. Next, cut the Required
quantity of short filler 2x4's
under the lower Horizontal.
Follow Typical building codes and
practices when spacing. Next,
cut the Required Left and Right
Vertical 2 x 4's as shown in Figure 3.
5. Lastly, install the Two (2) Supplied
Steel Headers above the replace
throat positioned to attach facing
material. NOTE: When this
assembly is in place, ensure
ALL the required clearances to
combustibles are maintained.
6. When the vent passes through
the rst adjacent ceiling (or wall
for horizontal runs) a Montigo
RHS102 heat shield must be
installed around the pipe as
shown above.
2. Once the replace is placed on the
platform, ensure there is access
to install the vent pipe, and inline
power vent module if applicable
and the gas line. Note the gas
line connection locationand room
to provide a gas service shut-o
valve; according tolocal gascodes.
Before fastening in place line up
the front face and rear face of the
replace (top and botttom), Figure
1. then secure in place with 1/4"
wood screws.

10
Installation
XG0231 - 061120
Figure 4. Flue cover and collar removal, Top Vented replace.
Figure 4.b Flue cover and collar installation, Rear Vented replace
R320 and R420 units have 5" and 8" venting and are converted to rear
venting in the same instructions as the 5" and 10"
NOTICE
Under no circumstances can Montigo ex venting be cut to
accommodate an installation. Use an alternative length to complete
your vent run.
NOTICE
Section 3: Venting
Montigo supplies a variety of power venting options. The location of
the power vent should be selected and laid out to provide the most
ecient possible run to an external wall or through the roof.
Notes For Planning Venting:
• Exemplar replaces are Power Vent Designated.
• Venting originates from the top or rear of the unit.
• Venting can terminate through the roof or exterior wall.
• For a detailed diagram of allowed termination locations, see
Appendix A.
• Once the termination location has been established refer to the
appropriate section for installation details.
• All replaces are shipped Top Vent from the factory.
• Follow the chart on page 14 or page 15 for maximum ventrun and
maximum elbows.
Section3-1:ConvertingtoRearVent
Exemplar units are shipped for Top Vent installations. Follow the
instructions to convert unit for Rear Vent installation:
Section3-1-1:ConvertingtheFlue
1. Remove the Rear ue cover with gasket on the ue outlet, as shown
in Figure 4. ENSURE YOU DO NOT DAMAGE THE FIBRE GASKETS.
2. Remove the Top ue collar on the ue outlet, as shown in Figure
4. ENSURE YOU DO NOT DAMAGE THE FIBRE GASKETS.
3. Install the removed Rear ue cover to the Top Vent outlet. Fasten
the cover with included hardware, as shown in Figure 4b.
Flue Cover Plate
(with gasket)
Iner
Flue Collar
(with gasket)
Inner Flue Collar
(with gasket)
Flue Cover Plate
(with gasket)
Flue Cover Plate
(with gasket)
Outer Flue
Collar (with
gasket)
Outer Flue
Collar
(with gasket)
Flue
Cover Plate
(with gasket)
4. Install the collars to the rear vent outlet using the included
hardware, as shown in Figure 4.b
5. Proceed to Section 3-1-2: Converting Pressure Sensing Tube
and Air Bae.

11
Installation
XG0231 - 061120
Figure 5 Factory installed Top Vent
Pressure Sensing Tube
Figure 5.c Removal of Top Vent air bae and pressure sensing tube
Figure 5.d Install of side air bae and pressure sensing tube.
Figure 5.b Supplied Rear Vent Pressure
Sensing Tube NOTE: Rearventpressuresensing tube is shipped inside the control box.
Section3-1-2:ConvertingthePressure
SensingTubeandAirBaffle
When the unit is converted from Top Vent to Rear Vent, the pressure
sensing tube must be removed and replaced with supplied Rear Vent
pressure sensing tube and air bae must be relocated as described
below.
1. Remove two screws from the air bae installed over the Top Vent
from inside the rebox. Once air bae is removed, replace the
two screws back into the same position. NOTE: Not all models
are equipped with an air bae. Only convert if available.
2. Remove Top Vent pressure sensing tube but loosening the
compression nut with a 1/2" wrench.
3. Position the supplied Rear Vent pressure sensing tube as shown
in Figure 5d. Hand tighten the compression nut by hand and then
a half-turn with a wrench.
4. Install air bae over Rear Vent from inside the rebox with two
screws provided at the Rear Vent.

12
Installation
XG0231 - 061120
Elbow 1
Elbow 2 Elbow 3
Elbow
H1
V1
D = 6’ foot
MAX
V3
H2
Elbow 4
This section applies to installations where the most ecient vent run is
through the roof. Refer to Appendix A - Power Vent locations, to ensure
the planned Power vent location is acceptable.
Figure 6.b Multi-Elbow, Top Vent, Roof mounted power vent.
Figure 6.c Multi-Elbow with downward vent run, Top or Rear Vent, Roof mounted power vent.
Multi-ElbowInstallations
Downward Vertical Venting
V1
V1
V3
D=6'Max
V2
H1
H1
Elbow1
Elbow1 Elbow2
Elbow3 Elbow4
H2
H2
V3
Section 3-2: Installing a Roof Mounted Vent System
Figure 6. Straight Vertical, Top Vent, Roof mounted power vent.
Selection of components and details of venting lay out should
adhere to the following guidelines:
Ensure the maximum vent run does not exceed 80’
Ensure the number of 90° elbows does not exceed 6
Ensure the number of 45° elbows does not exceed 12
Straight Venting Layout
V (Maximum
Length)
Max. #
Elbows
R320ST
R420ST 80' N/A
R520ST
R620ST 120' N/A
MAX V1+H1+
V2+H2+V3
Max. #
Elbows
R320ST, R420ST 80' 6
R520ST, R620ST 100' 6
MAX V1+H1+
D+H2+V3
Max. #
Elbows
R320ST, R420ST 40' 6
R520ST, R620ST 40' 6

13
Installation
XG0231 - 061120
H2
H1
VD
H
V
This section applies to installations where the shortest possible vent
run is through the wall. Refer to Appendix A - Power Vent locations,
to ensure the planned Power vent location is acceptable. Refer to the
table below for vent run requirements. Please note, images are shown
without screens for clarity purposes. However, your replace should
not be operated without proper installation of screens.
Figure 6.d Straight Horizontal, Top Vent, Wall mounted power vent.
Figure 6.f Multi-Elbow, Top Vent, Wall mounted power vent.
Figure 6.g Multi-Elbow with downward vent run, Top Vent, Wall mounted power vent.
Multi-ElbowInstallations
Downward Vertical Venting
V1
V1
V1 D=6'Max
V2
H1
H1
H1
H2
H2
V3
Section 3-3: Installing a Wall Mounted Vent System
Selection of components and details of venting lay out should
adhere to the following guidelines:
Ensure the maximum vent run does not exceed 100’
Ensure the number of 90° elbows does not exceed 6
Ensure the number of 45° elbows does not exceed 12
OneElbowLayout
MAX V1+H1+
V2+H2+V3+H3
Max. #
Elbows
R320ST, R420ST 100' 6
R520ST, R620ST 100' 6
MAX V1+H1+
D+H2+V3
Max. #
Elbows
R320ST, R420ST 40' 6
R520ST, R620ST 40' 6
MAX V1+H1 Max. #
Elbows
R320ST, R420ST 100' 6
R520ST, R620ST 100' 6

14
Installation
XG0231 - 061120
Connectionandinstallationofthevent
components should adhere to the following
guidelines:
Section 3-3-2: Venting Components
The following components andassociated Montigo part numbers arefor
installation of a roof or wall mounted termination. Use of non-Montigo
approved 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 1½” of
overlap.
• Ensure all horizontal runs are supported with a minimum of 3
supports per 10’ of venting.
• When hanging/supporting venting, ensure that 1” clearance is
maintained on sides and bottom of vent runs and 2” above horizontal
vent runs to any combustible material.
• Rigid pipe may be cut less than half way from the FEMALE END ONLY.
• Ensure when cutting sections of rigid pipe to maintain integrity of
internal supports.
• FLEX PIPE CANNOT BE CUT
• Place the springs, supplied with the pipe kit (ex only), between the
outer and inner pipes to keep the pipes separate and avoid any
possible hot spots.
• Montigo recommends the use of a ex section for the rst section of
venting connected directly to the replace, oering 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.
IMPORTANT:
Please refer to your Building Envelope Engineer
or Waterproong Consultant for a review of ALL
penetrations through exterior walls or the roof.
A - Termination PVHEX58-300 Wall Mount 5"/8"
PVHFL58-300 Flush Wall Mount 5"/8"
PVVEX58-300 Roof Mount 5"/8"
PVHEX510-300 Wall Mount 5'/10'
PVHFL510-300 Flush Wall Mount 5'/10'
PVVEX510-300 Roof Mount 5'/10'
B - Frame Kits EPVRRF (Roof Mount 5"/10")
EPVRWF (Wall Mount 5"/10")
C - Flex Sections
(5/8 Vent) PFL1 (12" f/f Section)
PFL2 (24" f/f Section)
PFL3 (36" f/f Section)
PFL4 (48" f/f Section)
PFL6 (72" f/f Section)
D - Flex Sections
(5/10 Vent) RFL1 (12" f/f Section)
RFL2 (24" f/f Section)
RFL3 (36" f/f Section)
RFL4 (48" f/f Section)
RFL6 (72" f/f Section)
E - Rigid Sections
(5/8 Vent) 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)
(5/10 Vent) RXT - 10 (10" f/f Section)
RXT - 20 (20" f/f Section)
REXT - 1 (12" f/m Section)
REXT - 2 (24" f/m Section)
REXT - 3 (36" f/m Section)
REXT - 4 (48" f/m Section)
REXT - 6 (72" f/m Section)
F-Elbows
(5/8 Vent) PEL-90MM (m/m 90º Elbow)
PEL-90FF ( f/f 90º Elbow)
PEL-90FM ( f/m 90º Elbow)
PEL-45FM ( f/m 45º Elbow)
(5/10 Vent) REL-90MM (m/m 90º Elbow)
REL-90FF ( f/f 90º Elbow)
REL-90FM ( f/m 90º Elbow)
REL-45FM ( f/m 45º Elbow)
G-SupportRing&
Plate PSPXT-8 (5/8 venting)
RSPXT-10 (5/10 venting)
H - Firestop FS-8 (5/8 venting)
FS-10 (5/10 venting)
I - Heat Shield RHS101 (5"/8")
RHS102 (5"/10")

15
Installation
XG0231 - 061120
Installing a Wall Mounted RHS101 Heat shield (5"/8")
The RHS101 Heat shield must be used if vent pipe passes through a
wall or ceiling within 6' of the unit.
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. To complete the installation
fasten the Heat Shield Outer Section & inner section to the structure.
See Figure 7.
Figure 7. RHS101 Installation. (Install by sliding over vent pipe where it passes through the
combustible construction).
Section 3-3-3: Heat Shields
⅜'' min. Both sides Typical
⅜'' min.
⅜'' min.
Inner shield 9 ⅜''
Outer shield 10 ¼''
Combustible Framing
Installing a Wall Mounted RHS102 Heat shield (5"/10")
The RHS102 Heat shield must be used if vent pipe passes through a
wall or ceiling within 6' of the unit.
To install the RHS102, 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 RHS102 outer section on. To complete the installation
fasten the Heat Shield Outer Section & inner section to the structure.
See Figure 7.b
Figure 7.b RHS102 Installation. (Install by sliding over vent pipe where it passes through the
combustible construction).
¼'' min. Both sides Typical
¼'' min.
¼'' min.
Inner shield 11 ½''
Outer shield 10 ⅝''
Combustible Framing

16
Installation
XG0231 - 061120
Figure 8.b Control Box / Power Vent Wire Routing Diagram
Figure 8. (Control Panel Overview)
Figure 8.c (Wall Switch Wire connection)
Section 4: Wiring
Ensure the wires are properly isolated from metal parts or control
system will be damaged
CAUTION
Heat Sensor /
Conmustion Switch
Control
Box
Horizontal
Po
wer Vent
Te
rmination
Vertica
l
Power Vent
Termination
Power cable
Installation
required for either Horizontal
or Vertical Termination Vent
115Va
c 60 Hz
supply from
Distribution P
anel
Wall Switch
Power
Vent
20 foot control
cable to replace
(standard)
Left-side View Right-side View
20 foot control cable to
replace (standard)
Horizontal
Power Vent
Termination Control
Box
Power
Vent
Power cable Installation
required for either Horizontal
or Vertical Termination Vent
Wall Switch
115Vac 60 Hz
supply from
Distribution Panel
Vertical
Power Vent
Termination
Power Vent
Speed Control
Post Purge
Timer (3 min.)
Prepurge
Timer (1 min.)
Power Vent
Connector
Power Vent
Fuse (5A)
LED Power
Indicator
Control Panel
Fuse (5A)
Installing the Fireplace Control Box
Install theFireplaceControlBoxinan accessiblelocation.Thelocationshould
be where maintenance, adjustments and service may be made easily.
Installing the Wall Switch
The unit may be connected to a wall switch. The system operates on
a 24V AC. DO NOT connect this circuit to an external power source
LED
INDICATOR
115V
OUTLET
CONTROL
CABLE
POWER
VENT
HARNESS
WALL
SWITCH
115V
POWER
SUPPLY
FUSE

17
Installation
XG0231 - 061120
Figure 8.d Electrical control panel
Electrical control panel
115
R1 R2 R3
R1
R2
Light
PV
Plug
PV Speed
Controller
Yellow Yellow
Black
Blue
Blue
Brown
YellowBlue
Black
White
White
1
2
3
4 5
Combustion
Air
Flue
Gas
Wall
Switch
Orange
White
Black
Blk/Wht Wht/Blk
Blue
Red
Brown
NC
Combustion
Air
NO
Flue
Gas
ELECTRICAL CONTROL PANEL
R3
Gas
Valve
Wall
Switch
Fuse
110 Volts
60Hz
5A
Post Purge
Timer
Pre-Purge
Timer
Honeywell (Q3450)
Pilot Assembly
Pilot Electrical
Harness Connector
Honeywell Gas
Control (SV9501M)
Gas Control
onnector
Conduit & Wiring clearances
1”Clearance
Note:
If any of the original wire supplied with the appliance is
replaced, it must be with the same or its equivalent.
Connect the power vent power cord as outlined in the
previous section. Ensure that the proper clearances are
maintained for the wiring and conduit. When installing the
wiring it must never run above the vent run and it must be
at least 1” clear of all venting. Vent pipe

18
Installation
XG0231 - 061120
Fuel Type
• Verify that your replace is compatible with your available gas type.
• Natural Gas or Propane shown by "N" or "L" in your model number
on rating plate.
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 (during operation):
• The manifold outlet pressure isset from the factory tothe appropriate
pressure but should be veried.
• To check pressures, control valves have a provision to remove a ⅛”
N.P.T. plug to be tted with a hose barb.
• Montigo requires a service shut o valve be located in an accessible
location to isolate the gas supply.
• Only install gas shut-o 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 9.b 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 ½" Male NPT gas inlet.
• Purge all air out of gas line before connecting port.
• 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.
PRESSURE REQUIREMENTS
Gas Pressure Natural Gas Propane
Minimum inlet pressure 5.5in. w.c. 11in. w.c.
Manifold pressure 3.5in. w.c. 10in. w.c.
Section 5: Installing the gas line
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 a 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. A re or explosion
will occur, causing serious injury, property damage or death.
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.
WARNING
DANGER
When pressure testing the replace, gas line, and input system
follow the appropriate local codes for your area. DO NOT connect
the replace to pressures in excess of ½lb. This will damage the gas
control valve.
Figure 9. Pressure Requirements
Figure 9.b.b Identifying the Gas Inlet and Combustion Air Switch Sensor Line
Figure 9.b gas line access
NOTICE
1
¾”
1/2”
MPT gas
inlet

19
Installation
XG0231 - 061120
Section 6: Testing the system
6-1:Testingthesystembeforegas
connection
The Control and Power Vent System can be safely tested prior to nish
framing the Fireplace. This test can be done quickly and eciently to
ensure all systems function according to the design specications.
The replace should be installed on the rough-in frame, Figure 3 with
the Power Vent Module and the Vent run connected.
• The control panel is supplied with a power cord plug in.
• Plug it into an extension cord or any other 110 Volt power supply.
• If the red LED is illuminated (beside the fuse) you have power to
the panel.
• If no LED, check fuse and replace with equally rated fuse.
• Turn the wall switch to the on position.
• Wall switch and combustion air LED illuminate approximately 30
seconds after the power vent reaches factory set speed. The ue
gas switch LED will light up approximately 1 minute after ue gas
LED is lit and the gas valve will turn on. You can hear a clicking sound
and the Hot Surface Ignitor will glow red. This conrms the control
system operation. Note: If the ue gas LED does not light up after
1 minute, slowly increase the power vent speed until the LED turns
on. Speed controller located inside the control box, see gure 8.d.
6-2: Testing the system with gas
connection (Highly recommended)
The Control and Power Vent System can be safely tested prior to nish
framing the Fireplace. This test can be done quickly and eciently to
ensure all systems function according to the design specications.
The replace should be installed on the rough-in frame, Figure 3 with
the Power Vent Module and the Vent run connected.
• Turn gas supply valve on
• The control panel is supplied with a power cord plug in.
• Plug it into a extension cord or any other 110 Volt power supply.
• If the red LED is illuminated (beside the fuse) you have power to
the panel.
• If no LED, check fuse and replace with equally rated fuse.
• Turn the wall switch to the on position.
• Once the replace is running normally, conrm manifold pressure
and supply pressure
Figure 9.c LED Indicators

20
Installation
XG0231 - 061120
Section 7: Finishing the fireplace
Step 1: Remove screws from
perimeter of glass as shown
below. The screws will be used
to fasten the cement board,
provided by Montigo, to the unit
in the nishing stages. Remove
the marked screws above and
below the glass. Place provided
template to check screw hole
positioning. Transfer template
to provided cementboard to pre
drill pilot holes. Refer to gures
below for Screw locations.
Step 2: As shown in Figure 4;
Use Cement Board, supplied
by Montigo, to overlap the new
2 x 4's and Non-combustible
Header (front & rear face). Attach
on all sides of the glass, allowing
1/8" clearance from the rim of
the replace opening. Top piece
attaches to non combustible
header and replace. Bottom
piece attaches to replace and
combustible horizontal framing
member. Side pieces attach to
vertical 2x4s.
Step 3: As shown in Figure 5; Cut
standard Drywall / Wall board
to complete the installation of
Both surrounds.
Figure 10. R320 Fireplace Screw Locations. Both Sides are Typical.
Figure 10.b Fireplace installation (Cut the remainder of Gyproc / Wall board to complete the replace surround).
Figure 10.b Fireplace installation (Cut the remainder of Drywall / Wall board to complete the replace surrounds) Both Sides Typical.
R320
3 Screws Top
&
3 Screws
Bottom
Front View Side View
Non-Combustible cement board,
(Supplied by Montigo) or Equivalent
Pre-drill for sheet metal screws to fasten
cement board to
framing
Pre-drilled holes Top and Bottom using template for sheet meta
screws to fasten cement board to
unit using previous screw holes
Sheet metal screws to attach Non-Combustible
Cement board to Steel header, (supplied by Montigo)
Clearance required
for expansion of the
fireplace when
in operation Height
Fasten Cement Board to Non-Combustible
Header using sheet metal screws and Unit,
using screws removed in step 1 (see gures 1
and 2 in Section 3 on page 10).
Fasten Cement Board to Unit, using screws
removed in step 1 (see gures 1 and 2 in
Section 3 on page 10), and to combustible
cross members.
Fasten Cement Board to Unit, using screws
removed in step 1 (see gures 1 and 2 in
Section 3 on page 10), and to combustible
cross members.
Fasten cement board to unit using
screws removed from unit existing
screw holes, and predrilled holes
using sheet metal screws.
Combustible Drywall / Wallboard
or Equivalent (Top, Bottom & Sides)
Sheet metal screws to attached Non-combustible cement
board to framing (supplied)
Pre drilled holes Top and Bottom using template for existing sheet metal
screws to fasten cement board to unit using previous screw holes
Non-combustible cement board (supplied)
Combustible Drywall or equivalent
(Top, Bottom, Sides)
Pre-drill for sheet metal screws to fasten
cement board to framing
Clearance required for
expansion of the replace
when in operation
Fasten cement board to unit using
screws removed from existing screw
holes using sheet metal screws
Fasten cement board to unit using screws
removed from existing screw holes using sheet
metal screws
Fasten cement board to unit using screws
removed from existing screw holes using sheet
metal screws
Height
R320
3 Screw Top
& 3 Screws
bottom
Front View Side View