Montigo R720 Instruction Manual

Canadian Heating Products Inc. Langley, BC V4W 4A1 | Montigo Del Ray Corp. Ferndale, WA 98248
IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
Immediately call your gas supplier from a neighbor's phone. Follow the gas
supplier's instructions.
If you cannot reach your gas supplier, call the fire department.
DANGER
Irritant
Cutting
Watchyour step
Slipperyfloor
Hightemperatures
Glasshazard
Dangerof suffocation
Highvoltage
Toxic
Flammablematerials
Corrosive
Forklift trucks
Dangeroverhead crane
Explosionrisk
Oxidising
Dangerof death
Biohazard
LaserRadiation
Dangerof entrapment
Hotsurface
GeneralWarning
Blank
Gasbottles
Watchfor
fallingobjects
Electricity
Dangerfor cutter
Entrapmenthazard
Batteryhazard
Rotatingparts
Lowtemperature
Strongmagnetic field
Opticalradiation
Nonionizing
radiation
Radiation
Hazardousto the
Environment
Dangerof harming
yourhands
Irritant
Cutting
Watchyour step
Slipperyfloor
Hightemperatures
Glasshazard
Dangerof suffocation
Highvoltage
Toxic
Flammablematerials
Corrosive
Forklift trucks
Dangeroverhead crane
Explosionrisk
Oxidising
Dangerof death
Biohazard
LaserRadiation
Dangerof entrapment
Hotsurface
GeneralWarning
Blank
Gasbottles
Watchfor
fallingobjects
Electricity
Dangerfor cutter
Entrapmenthazard
Batteryhazard
Rotatingparts
Lowtemperature
Strongmagnetic field
Opticalradiation
Nonionizing
radiation
Radiation
Hazardousto the
Environment
Dangerof harming
yourhands
Irritant
Cutting
Watchyour step
Slipperyfloor
Hightemperatures
Glasshazard
Dangerof suffocation
Highvoltage
Toxic
Flammablematerials
Corrosive
Forklift trucks
Dangeroverhead crane
Explosionrisk
Oxidising
Dangerof death
Biohazard
LaserRadiation
Dangerof entrapment
Hotsurface
GeneralWarning
Blank
Gasbottles
Watchfor
fallingobjects
Electricity
Dangerfor cutter
Entrapmenthazard
Batteryhazard
Rotatingparts
Lowtemperature
Strongmagnetic field
Opticalradiation
Nonionizing
radiation
Radiation
Hazardousto the
Environment
Dangerof harming
yourhands
Irritant
Cutting
Watchyour step
Slipperyfloor
Hightemperatures
Glasshazard
Dangerof suffocation
Highvoltage
Toxic
Flammablematerials
Corrosive
Forklift trucks
Dangeroverhead crane
Explosionrisk
Oxidising
Dangerof death
Biohazard
LaserRadiation
Dangerof entrapment
Hotsurface
GeneralWarning
Blank
Gasbottles
Watchfor
fallingobjects
Electricity
Dangerfor cutter
Entrapmenthazard
Batteryhazard
Rotatingparts
Installer: Leave this manual with the appliance.
Consumer: Retain this manual for future reference.
NOTICE
If the information in these instructions is not followed exactly, a fire or explosion
may result causing property damage, personal injury or death.
WARNING
This fireplace is certified to ANSI Z21.50 / CSA 2.22 Vented Fireplace Standard as a
power assisted direct vent fireplace. This product uses outdoor air for combustion and
and exhausts combustion products outdoors.
NOTICE
®
C US
XG0772 150105.4
R720
R820
R-Series
Indoor
Resi dential
Fireplace
Installation & Maintenance Manual

Page 2 XG0772 - 150105.4
Table of Contents
R720 & R820 Power Vent Indoor Gas Fireplace
Instruction Manual Contents
Safety Alerts � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3
Introduction� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3
Installation� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �4
Section A: Before You Begin � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �4
Standard Installation Checklist� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �5
Introduction to the R-Series Fireplace: � � � � � � � � � � � � � � � � � � � � � � � � � �6
Rating Plate Sample � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �7
Section 1: Product Dimensions � � � � � � � � � � � � � � � � � � � � � � � � � � �8
Section 2: Framing � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �10
Clearances: � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �10
Raised Installation: � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �11
Installing the Fireplace: � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �12
Back framing the Fireplace � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �13
Recessed Installation: � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �14
Section 3: Venting� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �15
Notes For Planning Venting: � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �15
Section 3-1: Converting to Rear Vent� � � � � � � � � � � � � � � � � � � � � �15
Section 3-1-1: Converting the Flue � � � � � � � � � � � � � � � � � � � � � � � � � � �15
Section 3-1-2: Converting the Pressure Sensing Tube and Air Bafe �16
Section 3-2: Installing a Roof Mounted Vent System � � � � � � � � �17
Section3-2-1:InstallingRoofMountedPowerVentModule-PVVEX510-300
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �18
Section 3-3: Installing a Wall Mounted Vent System � � � � � � � � �19
Section3-3-1:InstallingWallMountedPowerVentModules-PVHEX510-300
and PVHFL510-300� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �20
Section 3-4: Venting components� � � � � � � � � � � � � � � � � � � � � � � � �21
Section 3-5: Heat Shields � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �22
Section 4: Wiring� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �23
Installing the Fireplace Control Box� � � � � � � � � � � � � � � � � � � � � � � � � � � �23
Installation of Electrical Supply � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �24
Installing the Wall Switch � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �24
Section 5: Installing the gas line� � � � � � � � � � � � � � � � � � � � � � � � � �26
Fuel Type � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �26
Gas Pressure� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �26
GAS CONNECTION � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �26
Section 6: Testing the system� � � � � � � � � � � � � � � � � � � � � � � � � � � �27
6-1: Testing the system before gas connection� � � � � � � � � � � � � � � � � � �27
Section 7: Finishing the replace � � � � � � � � � � � � � � � � � � � � � � � � �28
Finishing Around the Fireplace � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �29
Mantels & Surrounds � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �29
Section 8: Removing & Installing Screen and Window � � � � � � �30
Section 9: Installing the Firestones � � � � � � � � � � � � � � � � � � � � � � �31
Optional Log Set � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �32
Operation� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �36
Section 10: Cleaning and Maintenance � � � � � � � � � � � � � � � � � � � �37
Replacement Parts � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �38
Appendix A: Power Vent Locations � � � � � � � � � � � � � � � � � � � � � � �39
PVVEX510-300 Vertical Power Vent Detail � � � � � � � � � � � � � � � � � � � � �39
24''� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �39
PVVEX510-300 Power Vent Locations � � � � � � � � � � � � � � � � � � � � 40
PVHEX510-300 Horizontal Power Vent Detail� � � � � � � � � � � � � � � � � � �41
PVHEX510-300 Power Vent Locations � � � � � � � � � � � � � � � � � � � � � � � �42
PVHFL510-300 Horizontal Power Vent Detail � � � � � � � � � � � � � � � � � � �43
PVHFL510-300 Power Vent Locations � � � � � � � � � � � � � � � � � � � �44
Appendix B: Warranty � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �45
Appendix C: State of Massachusetts � � � � � � � � � � � � � � � � � � � � � �46

Congratulations on your purchase of a Montigo Fireplace�
Withover30yearsofexperience,Montigoiscommittedtoproviding
you with a gas replace that is not only a beautiful addition to your
space, but that is also designed and manufactured to the highest
safety, reliability and engineering standards�
Westronglyencourageyoutoreadandcarefullyfollowtheinstructions
laid out in this Installation, Operation and Maintenance Manual
and retain it for your future reference� Pay special attention to all
cautions, warnings, and notices throughout this manual intended
to ensure your safety�
Thismanualcoversinstallation,operationandmaintenance� Lighting,
operation and care of this replace can be easily performed by the
homeowner� All installation and service work should be performed
by a qualied or licensed installer, plumber or gas tter as certied
by the state, province, region or governing body where the replace
is being installed�
This installation, operation and maintenance manual is applicable
to the models described below� 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.
ConsultyourlocalGasInspectionBranchoninstallationrequirements
for factory-built gas replaces. Installation & repairs should be done
by a qualied contractor.
R720N-I X 100,000 X X
R720L-I X 80,000 X X
R820N-I X 100,000 X X
R820L-I X 80,000 X X
MODEL Natural Gas Liquid Propane Gas Rating (BTU hr) Linear Burner w/ Glass Accessories Honeywell Hot Surface Ignition
Safety Alerts
Introduction
Young children should be carefully supervised when they are
in the same room as the applicance. Toddlers, young children
and others may be susceptible to accidental contact burns. A
physical barrier is recommended if there are at risk individuals
in the house. To restrict access to a fireplace or stove, install
an adjustable safety gate to keep toddles, young children and
other at risk individuals out of the room and away from hot
surfaces.
CAUTION
Page 3
XG0772 - 150105.4
R720 & R820 Power Vent Indoor Gas Fireplace
Safety Alert Key
Introduction

Installation and repairs should be done by an authorized gas fireplace service technician.
Theapplianceshouldbeinspectedbeforeuseandatleastannuallybyaprofessional.More
frequent cleaning may be required due to excessive lint from carpeting, bedding material,
etc. It is imperative that control compartments, burners and circulating air passageways of
thefireplacearekept clean.
NOTICE
IMPORTANT MESSAGE: SAVE THESE INSTRUCTIONS
The R720* & R820* Power Vent 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 theneed fora permitprior tostarting theinstallation�
It is the responsibility of the installer to ensure this replace is
installedincompliancewith themanufacturersinstructionsand
all applicable codes�
BEFORE YOU START:
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 efcient vent run.
■ Lay out the Vent run; calculating the required elbows
and straight runs of 5"/10" ex and/or rigid pipe.
■ 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, CSAC22�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 mustconform tothe localcodes or,in theabsence
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�
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.
Youngchildrenshouldbecarefullysupervisedwhentheyareinthesameroomasthe
appliance.
Clothing or other flammable materials should not be placed on or near the appliance.
CAUTION
Whenthisapplianceisinstalleddirectly on any combustible material otherthanwood
flooring, it must be installed on a metal or wood panel extending the full width and
depth of the appliance or a fire will occur causing serious injury, property damage or
even death.
DANGER
Installation
R720 & R820 Power Vent Indoor Gas Fireplace
Page 4 XG0772 - 150105�4
Section A: Before You Begin
Installation

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): R720STDFN R720STDFL
R820STDFN R820STDFL
Dealer Phone:
Serial #:
YES NO IF NO, WHY NOT?
Appliance Install: Section 2
Framing complies with install manual�
Standoffs 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 apliance and veried no gas leaks exist.
Comments:
R720 & R820 Power Vent Indoor Gas Fireplace
Page 5
XG0772 - 150105�4
Installation

Introduction to the R-Series Fireplace:
The complete system will require a rebox, a power vent module,
an electrical control panel, and a vent system� The appropriate vent
system will connect the rebox to the power vent module and will be
placed in a vertical or horizontal location� The R-Series replace
is not a heat efcient replace and should not be used with a
thermostat to heat your home. This product is a re feature and
shouldonlybeusedtoenhancetheambianceoftheroom�Please
reviewtheInstallationChecklistonPage4forgeneralinformationon
preparing for a successful installation of your replace.
Install location:
The R-Series 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, must be considered
when selecting the replace location. Try to select a location that does
not interfere with room trafc, has adequate ventilation, and offers
an accessible pathway for Power Vent installation�
Basic Operation:
The gas control components of this replace are located in the bottom
of the rebox below the burner system. All models are supplied with
a Honeywell smart valve gas control and do NOT have a variable
ame control. There are two air switches that control the gas control
system, located in the bottom of the rebox. These gas valves and
pressure switches communicate with the electrical control panel
through a six conductor cable supplied with the replace.
To operate the replace, Montigo supplies 20' of low voltage wire
from the electrical control panel� Connect the two wire harnesses
to a standard single pole ON/OFF switch to the location of your
choice. You may extend these wires up to 100' in length with a wire
of equal quality�
CAUTION: Do NOT connect power to these wires�
ON/OFF control of this appliance can also be performed using an
optional remote control available from your Montigo dealer�
TheR720* & R820*are classified underpowerventedfireplacesystems.
Undernocircumstancescanthese models beinstalled withouta PowerVentModule.
For Horizontal Vent Installations, use 5”/10” Power Vent Motor PVHEX510-300 or
PVHFL510-300.
ForVertical Vent Installations,use5”/10”PowerVentMotorPVVEX510-300.
WARNING
R720 & R820 Power Vent Indoor Gas Fireplace
Page 6 XG0772 - 150105�4
Installation

Rating Plate Sample



 












LBL1207D-V5.0 R(P)VIEW_HSI_WITH SCREEN _DEC.11.2014
  










 


    




  

  


  



    






 
 
 


 



Teklynx LabelView Demo
Figure A: Rating Plate for R720



 












LBL1207D-V5.0 R(P)VIEW_HSI_WITH SCREEN _DEC.11.2014
  










 


    




  
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 
 
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
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Teklynx LabelView Demo
Figure A: Rating Plate for R820
R720 & R820 Power Vent Indoor Gas Fireplace
Page 7
XG0772 - 150105�4
Installation

Section 1: Product Dimensions
Front View
Figure 1� R720* Fireplace dimensions (Tolerance ± ⅛").
Top View
Side View
96 5
8
"
2456
40"
1018
83 1
4
"
2115
16"
407
85 1
4
"
2165
89 1
2
"
2275
20 5
8
"
525
15 1
4
"
387
5"
127
10"
254
11 1
4
"
284
21
2
"
64
15 1
8
"
384
3"
77
18 1
8
"
460
21 3
4
"
553
53
8
"
138
11
2
"
39
33 7
8
"
862
Gas Inlet
Combustion Air Switch
Sensor Line
R720 & R820 Power Vent Indoor Gas Fireplace
Page 8 XG0772 - 150105�4
Installation

Figure 1a� R820* Fireplace dimensions (Tolerance ± ⅛").
Front View
Top View
95 1
4
"
2420
16"
407
108 5
8
"
2761
40"
1018
97 1
4
"
2470
101 1
2
"
2579
20 3
4
"
526
15 1
4
"
387
10"
254
5"
127
11 1
4
"
285
15 1
8
"
384
18 1
8
"
460
21 3
4
"
553
53
8
"
138
3"
78
27
8
"
74
33 7
8
"
862
Gas Inlet
Combustion Air Switch
Sensor Line
Side View
R720 & R820 Power Vent Indoor Gas Fireplace
Page 9
XG0772 - 150105�4
Installation

Frame in the enclosure for the unit with framing materials, see
Figure 3 .
NOTE:Whenconstructingtheframedopening,pleaseensurethereis
accesstoinstallthegaslinewhentheunitisinstalled�SeeFigure16�
Clearances:
To ensure the replace operates safely, all models must maintain
the following clearances:
R720* 24 24 2 6 3 0 See Section
7 Finishing
around the
replace
R820* 24 24 2 6 3 0
MODEL Top - Rear Vent †
Rear - Top Vent Rear - Rear Vent Sides Floor Mantel
Top - Top Vent †
† Note: C l e a r a n c e f r o m t o p o f  r e p l a c e t o a c o m b u s t i b l e c e i l i n g
within the replace enclosure.
Unprotected combustible walls which are perpendicular to the replace
opening must maintain 6" clearance, see gure 20�
Figure 2. Clearances for rear vented installation with elbow.
Figure 2a. Clearances for top or rear vented installation, straight vent
run or with elbow(s).
VentingClearanceRequirements:
Wall framing
14” Min.
Wall framing
2” Min.
Note: Images are shown without screens for clarity purposes�
However, your replace should not be operated without proper
installation of screens�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 10 XG0772 - 150105�4
Installation
Section 2: Framing

Figure 3. Fireplace installation, (Rough Frame-In dimensions).
Framing Dimensions
Model Q R U
R-Series R720* 101" 46" **23"†
R-Series R820* 113" 46" **23"†
Determine the height of the platform based on where you want the
bottomedgeoftheglasstobe,seegure 1 or 1a forunitdimensions�
Maintain minimum ceiling height shown in table. Build replace frame
as shown in gure 3�
Q (Opening)
R
(Opening)
U
3/4”
Plywood
Drywall
or Equiv.
Platform
** See Figure 1 or 1a.
† U is 29" for straight out the back vent run installations.
Raised Installation:
Maximum
Platform Height Minimum Required Ceiling Height
24" 8'
48" 10'
24"
610
34"
863
8"
203
PVHEX510-300
Stud Wall
Rear
Fireplace
Floor
Header
Termination
Mounting
Flange
24"
610
38 3
4
"
983
18 1
4
"
463
PVHFL510-300
Stud Wall
Rear
Fireplace
Floor
Header
Termination
Mounting
Flange
Figure 2b. Clearances for straight rear vented installation with
PVHEX510-300. Figure 2c. Clearances for straight rear vented installation with PVHFL510-300.
Note: Images are shown without screens for clarity purposes�
However, your replace should not be operated without proper
installation of screens�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 11
XG0772 - 150105�4
Installation

Place the Fireplace on the platform and install the Vent pipe, and Power Vent module� Next, connect the Gas line, and provide a gas service
shut-off valve; according to local gas codes. Before fastening in place line up the front face of the replace (top and bottom Figure 3)� then
secure in place with 1/4"bolts and washers to the platform.
Figure 4. Fireplace installation, (Inlet Gas & Power Vent).
Installing the Fireplace:
1/2”
Supply Gas
connection
Intake / Exhaust
Vent Pipe (5”/10”)
2” Clearance
2” Clearance
Note: Images are shown without screens for clarity purposes�
However, your replace should not be operated without proper
installation of screens�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 12 XG0772 - 150105�4
Installation

Figure 5. Completed back frame Fireplace installation
Back framing the Fireplace
NOTE: 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�
Step 1)� Cut and install one 2x4 to t horizontally under the replace throat.
Step 2)� Cut and install required quantity of short ller 2x4's to t vertically under the horizontal piece.
Step 3)� Cut and install four vertical 2x4's. Place 2 on each side of the replace throat.
Step 4)� Join the two steel header pieces to get the required length, see chart below for steel header measurements�
Step 5)� Install supplied steel header 1" above the throat. Attach steel header to vertical 2x4's as shown in gure 5�
Step 6)� Cut and install one horizontal 2x4 below the top frame�
1” clearance
1” clearance
Model Supplied Steel Header
Measurements
Installed Steel
Header
Measurements
R720* 80" x 3" - qty 2 95" x 3"
R820* 80" x 3" - qty 2 107" x 3"
Steel header
(supplied by Montigo) 2-pcs 2 x 4 (vertical)
Both Sides Typ.
1” clearance 1” clearance
2
x 4
(horizontal)
2 x 4
(horizontal)
2 x 4
(Vertical)
Note: Images are shown without screens for clarity purposes�
However, your replace should not be operated without proper
installation of screens�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 13
XG0772 - 150105�4
Installation

Picture of Non combustible Header
Recessed Installation:
This replace can be recessed into the oor to get the viewing area as low as possible.
Maintain a minimum of 6" clearance from the bottom of glass to completed oor. Minimum clearance can be reduced to 3" for uncarpeted
ooring. Discolouration may occur due to high temperatures.
Figure 6. Recessed Fireplace installation
6” clearance
1” clearance
Recessed Floor
Steel header
(supplied by Montigo) 2-pcs 2 x 4 (vertical)
Both Sides Typ.
1” clearance 1” clearance
2
x
4
(horizontal)
2 x 4
(Vertical)
1” clearance 1” clearance
2 x 4
(horizontal )
Note: Images are shown without screens for clarity purposes�
However, your replace should not be operated without proper
installation of screens�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 14 XG0772 - 150105�4
Installation

Figure 7. Flue cover and collar removal, Top Vented
replace
Figure 7a. Flue cover and collar installation, Rear Vented
replace
R720 & R820 Power Vent Indoor Gas Fireplace
Page 15
XG0772 - 150105�4
Installation
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
efcient possible run to an external wall or through the roof.
Notes For Planning Venting:
Section 3-1: Converting to Rear Vent
R-Series 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 (5" and 10") on
the ue outlet, as shown in Figure 7. ENSURE YOU DO
NOT DAMAGE THE FIBRE GASKETS�
2. Remove the Top ue collar (5" and 10") on the ue outlet,
as shown in Figure 7. ENSURE YOU DO NOT DAMAGE
THE FIBRE GASKETS�
5”Inner Flue Collar
10” Outer Flue Collar
10” Flue Cover Plate
5” Flue Cover Plate
(with gasket)
(with gasket)
(with gasket)
(with gasket)
10” Flue Cover Plate
5” Flue Cover Plate
5”Inner Flue Collar
10” Outer Flue Collar
(with gasket)
(with gasket)
(with gasket)
(with gasket)
■ R-Series 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 15 or page 19 for maximum ventrun
and maximum elbows�
3. Install the removed Rear ue cover (5" and 10") to the Top
Vent outlet� Fasten the cover with included hardware, as
shown in Figure 7a�
4� Install the collars (5" and 10") to the rear vent outlet using
the included hardware, as shown in Figure 7a�
5� Proceed to Section 3-1-2: Converting Pressure Sensing
Tube and Air Bafe.

Figure 8. Factory installed Top Vent Pressure Sensing
Tube
Figure 8a. Supplied Rear Vent Pressure Sensing Tube
Figure 9. Removal of Top Vent air bafe and pressure
sensing tube.
Figure 9a. Removal of Top Vent air bafe and pressure
sensing tube.
NOTE: Rear vent pressure sensing tube is shipped inside the
control box�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 16 XG0772 - 150105�4
Installation
Section 3-1-2: Converting the Pressure Sensing
Tube and Air Bafe
When the R720* / R820* 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 bafe must be
relocated as described below�
1. Remove two screws from the air bafe installed over the Top
Vent from inside the rebox. Once air bafe is removed, replace
the two screws back into the same position�
Note: Not all models are equipped with an air bafe. Only convert
if available�
2� Remove Top Vent pressure sensing tube by loosening the ��
compression nut with a 1/2" wrench.
3� Position the supplied Rear Vent pressure sensing tube as
4. Install air bafe over Rear Vent from inside the rebox with two
screws provided at the Rear Vent�
shown in Figure 9a� Hand tighten the compression nut by
hand and then a half-turn with a wrench�
Do not over tighten�

Figure 10. Straight Vertical, Top or Rear Vent, Roof
mounted
power vent.
Figure 10a. Multi-Elbow, Top or Rear Vent, Roof mounted
power vent.
Note: Images are shown without screens for clarity purposes�
However, your replace should not be operated without proper
installation of screens�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 17
XG0772 - 150105�4
Installation
This section applies to installations where the most efcient vent run
is through the roof� 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�
Section 3-2: Installing a Roof Mounted Vent System
Vent Conguration Refer to Figure Maximum Vent Run
(Horizontal + Vertical) Maximum Elbows†
Straight Vertical Top or Rear Vent Figure 10 100 Feet Six 90°
or
equivalent †
Multi-Elbow Top or Rear Vent Figure 10a
Multi-Elbow with 6' downward vent
run Top or Rear Vent Figure 10b 70 Feet**
†One 90° elbow is equal to two 45° elbows�
** For every additional 1 foot downward vent run subtract 10 feet from the maximum vent run�

Figure 10b. Multi-Elbow with downward vent run, Top or
Rear Vent, Roof mounted power vent.
Note: Images are shown without screens for clarity purposes�
However, your replace should not be operated without proper
installation of screens�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 18 XG0772 - 150105�4
Installation
D**
D**
Section 3-2-1: Installing Roof Mounted Power Vent Module - PVVEX510-300
Note: See Power Vent manual for installation instructions.
Note: SeeAppendixA for clearance to exterior structures.

Figure 12. Straight Horizontal, Top or Rear Vent, Wall
mounted .....................................................................
power vent.
Figure 12a. Multi-Elbow,ToporRearVent,Wallmountedpowervent.
Note: Images are shown without screens for clarity purposes�
However, your replace should not be operated without proper
installation of screens�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 19
XG0772 - 150105�4
Installation
This sectionapplies to installationswhere theshortest possible vent
runisthroughthewall�RefertoAppendixA- PowerVentlocations,
to ensure the planned Power vent location is acceptable� Refer to
the table below for vent run requirements�
Section 3-3: Installing a Wall Mounted Vent System
Vent Conguration Refer to Figure Maximum Vent Run
(Horizontal + Vertical) Maximum Elbows†
Straight Horizontal Top or Rear Vent Figure 12 100 Feet Six 90°
or
equivalent †
Multi-Elbow Top or Rear Vent Figure 12a
Multi-Elbow with 6' downward vent
run Top or Rear Vent Figure 12b 70 Feet**
†One 90° elbow is equal to two 45° elbows�
** For every additional 1 foot downward vent run subtract 10 feet from the maximum vent run�

D**
Figure 12b. Multi-Elbow with downward vent run, Top or
Rear Vent, Wall mounted power vent.
Section 3-3-1: Installing Wall Mounted Power Vent Modules - PVHEX510-300 and
PVHFL510-300
Note: See Power Vent manual for installation instructions.
Note: SeeAppendixA for clearance to exterior structures.
Note: Images are shown without screens for clarity purposes�
However, your replace should not be operated without proper
installation of screens�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 20 XG0772 - 150105�4
Installation
D**