Montigo R320 Instruction Manual


R320Indoor
R420Indoor

R-Series
Residential
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
XW2002
XW2004
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

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
XW2006
Installer: Leave this manual with the
appliance. Do not remove.
Consumer: Retain this manual for
maintenance and future reference. Do
not Discard.
NOTICE
XW2012
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.
NOTICE
XW2014
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
XG0770 020911
Langley, BC V4W 4A1 |  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
XW2010

R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911
InstructionManualContents
SafetyAlertKey ............................................................ 3
Introduction .................................................................. 3
Congratulations on your purchase ................................. 3
Warranty and Installation Information: (See Appendix B) 3
 Installation .................................................................. 4
Section A: Before You Begin ......................................... 4
Important Message ..................................................... 4
Save these Instructions .............................................. 4
Before you start .............................................................. 4
Pre-Installation Checklist ............................................ 4
Understanding the Basic Operation ............................ 4
Residential R320-ST & R420-ST replace ................. 4
The R-Series R320-ST & R420-ST replaces ................ 5
Fireplace dimensions
Clearances.................................................................. 5
Section 1: Installation Overview & Product Dimensions 5
Section 2: Framing ......................................................... 6
Installing a Roof Mounted Power Vent........................ 9
Venting Layout ............................................................ 9
 
     
     
Section 3: Installing the Power Vent .............................. 9
Venting Components ................................................ 10
Installation of the External roof mounted power vent. 10
 
Installing a Wall Mounted Vertical Exterior Power Vent 13
Venting Layout .......................................................... 13
 
     
Venting Components ................................................ 14
Installation of the external wall mounted power vent 14
Installing the external wall mounted power vent module 15
Installation Of Electrical Supply .................................... 17
Installing The Remote Switch ....................................... 17
Section 4: Wiring .............................................................. 17
HSI Wiring Schematic .................................................. 18
Conduit & Wiring clearances ....................................... 18
IPI Wiring Schematic .................................................... 19
Fuel Consumption ........................................................ 20
Pressure requirements: ................................................ 20
Gas Connection............................................................ 20
Section 5: Installing the Gas Line ................................... 20
Fireplace Facing ........................................................... 21
Mantels & Surrounds ................................................ 21
Section 6: Finishing ......................................................... 21
Removing the doors: .................................................... 22
Section 7:Removing & Installing the Door ...................... 22
Installing the Door: ....................................................... 22
Section 8: Installing the Firestones ................................. 23
Optional River Rocks.................................................... 23
Operation ................................................................ 24
Section 9: Start-up Sequence ......................................... 24
Honeywell Intermittent Pilot .......................................... 24
For Your Safety - READ BEFORE LIGHTING .......... 24
Lighting Instructions .......................................................
General ................................................................ 25
Cleaning ................................................................ 25
Burner Adjustment ........................................................... 25
Gas Control Valve ............................................................ 25
Section 10: Cleaning and Maintenance ........................... 25
AppendixA ................................................................ 26
Power Vent Locations ...................................................... 26
Vertical Power Vent Detail ............................................ 27
Horizontal Power Vent Detail........................................ 27
AppendixB ................................................................ 28
Warranty ................................................................ 28
AppendixC ................................................................ 29
State of Massachusetts.................................................... 29

Page3
Indicates a hazardous situation which, if not
avoided, WILL result in death or serious
injury or property damage.
Indicates a hazardous situation which, if not
avoided, COULD result in death or serious
injury or property damage.
Indicates a hazardous situation which, if not
avoided, WILL result in minor or moderate
injury.
Address practices that are important, but
not related to personal injury
DANGER WARNING
CAUTION NOTICE
R-Series R320-R420 Indoor Gas Fireplace


XG0770 - 020911
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.
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.
 
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
Fireplace BTU/H Input
Model# Natural Gas Propane Venting Type Burner Type Ignition Type
R-Series R320 50,000 40,000 Top Dedicated Power Vent Linear Burner SIT Electronic Ignition (IPI)
R-Series R420 65,000 55,000 Top Dedicated Power Vent Linear Burner SIT Electronic Ignition (IPI)

Page4
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section:SectionA:BeforeYouBegin
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
XW2016
Important Message Save these Instructions
The R-Series Residential R320 & R420 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
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:
Pre-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 your type and location of your Power Vent
run: Roof Mounted (EDVRSPV58) or Wall Mounted
(EDVWSPV58).
■ Your termination location should be selected to provide
the shortest possible vent run.
■ Lay out the Vent run; calculating the required elbows
and straight runs of 5"/8" ex or rigid pipe.
■ Refer to the Section 3, "Installing the Power Vent"
for details.
■ The electrical panel is located on the lower right side
when facing the replace.
■ Montigo supplies 20' of low voltage wire, which can
be spliced to any length. This wire CANNOT run in
conduit with any other wire.
■ Refer to Section 4, Wiring for Details.
■ The gas connection is located on the lower end when
facing the replace.
■ 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
current CAN/CGA B-149.1 and .2 Gas Installation
Code and local regulations.
•InstallationsintheUSA must conform to local
codes, or in the absence of local codes to the
National Fuel Gas Code, ANSI Z223.1-1988.
•SeeAppendixCforinstallationwithintheState
ofMassachusetts. This replace must comply
with NFPA-54 Chapter 10.
■ Refer to Section 5, "Installing the Gas Line" for Details.
Understanding the Basic Operation
Residential R320 & R420 replace
The control compartment of this replace is located in the
bottom of the replace right below the burner system. All
models will be supplied with a Honeywell smart valve gas
control and will not have a variable ame control. There
are two air switches that are controlling the gas control
system, and are located in the bottom of this replace.
These gas valves, and pressure switches communicate
with the electrical control panel via a six conductor cable
supplied with the replace.
To operate the replace, Montigo has supplied and installed
twenty feet of low voltage wire to this electrical control
panel. Connect the two wire harness to a standard single
pole ON/Off switch located at a location of your choice.
You may also extent these wires to any length, as long as
you select a wire of equal quality.
XW2018
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
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
Electricity
Danger for cutter
Entrapment hazard
Battery hazard
Rotating parts
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.
XW2020
DANGER
XW2020-When-Installed_[EN].pdf 1 1/24/2011 12:48:53 PM

Page5
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section1:InstallationOverviewandProductDimensions
Thereplacedimensionsareshownbelowandonthe
followingpage:
 

UnitDimensions
A B C D E F G H I J K L M N
R-SeriesR320 48¹¹/₁₆" 38¹/₁₆" 19¾"16⅛" 37¼" 24⁵/₁₆"9½" 41⁹/₁₆" 15³/₁₆" 31¹⁵/₁₆"5" 8" 12⅜" 5⅞"
R-SeriesR420 60¹¹/₁₆" 38¹/₁₆" 19¾"16⅛" 49¼" 30⁵/₁₆"9½" 53⁹/₁₆" 15³/₁₆" 31¹⁵/₁₆"5" 8" 12⅜" 5⅞"
The C-View Residential R320 & R420 are power vented fireplace systems. Under no
circumstances can these model(s) be installed without a power vent module.
For regular Horizontal vent installation use 5"/8" model EDVWSPV58 with the rough-in kit,
EDVWSPV58F for the R320 & R420.
For regular Vertical vent installation use 5"/8" model EDVRSPV58 with the rough-in kit,
EDVRSPV58F for the R320 & R420.
WARNING
AAA
B
C
D
E
Front View
F
G
H
Top View
I
J
K
L
M
N
Side View

To ensure the R-Series Residential Fireplace operates
safely, all models must maintain the following clearances.
* See Instructions on page 4, (gure 1a)
** See Instructions on page 16, (Mantels & Surrounds)
Unprotected combustible walls which are perpendicular to
the replace opening, must not be closer to the replace
than the described in Figure 16.
    

Exterior
Sheating
Exterior
Finishing
Material
Exterior wall
framing
Exterior
EPVRW
Power Vent
EPVRWF rough
-in Frame
Min
6”
**27”
See Fig. 16
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

 10"
 10”
 2"
 3”
 0"
 6"

10"
10”
2"
3”
0"
6"

Page6
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section:Section2:Framing
Q (Opening)
R (Opening)
both sides
typical
U
¾"
Plywood
Platform
Drywall
or Equivelant
Figure 2. Fireplace installation, (Rough Frame-In dimensions) Both Sides are Typical.
Step2. Place the Fireplace on the platform and install the
Vent pipe, and Power Vent module. (Install the module in
a location where it can be accessed when the surround is
installed around the replace). 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
and rear face of the replace (top and bottom), Figure 2a.
then secure in place with 1/4" wood screws.
Step1. To ensure your glass viewing area is at the optimum
height, follow the Example below, Figure 2. Example: If you
wish to have the bottom edge of the glass to be 24", the
top of the platform will be 8 7/8", ( 24"- 15 1/8" = 8 7/8" ).
This dimension takes in account the height of the
platform,plywoodandadequateclearances.
Figure 2a. Fireplace installation, (Inlet Gas & Power Vent) .
Step 3. Back-framing the Fireplace; installing 2 x 4's,
(Typical Both sides).
Ensure you have the required 2 x 4's to complete the project.
Cut Two (2) - 2 x 4's to t under the front & rear replace
throat, (horizontal), t & remove. Next, cut the short 2 x
4's, to t at each end under the previous Horizontals'. (Note:
when these pieces are secured into place there should be the required
1" clearance to combustibles), Figure 2b.
Framing Dimensions
Model# Q R U
R-Series R320 55" 47" **23¾"
R-Series R420 67" 47" **23¾"
** See Figure 1
½"
RHS101 (up to 6')
Installed on top of firestop
Supply Gas
connection
Intake / Exhaust
Venting
3" clearance to combustibles
around the exhaust pipe
when using firestop

Page7
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

NOTE:Remember, both sides of the Fireplace require the
same quantities of wood, drywall and hardware.
Cut the Upper and Lower Horizontal 2 x 4's in accordance
with Figure 2b. Next, cut the Required quantity of short ller
2x4's under the lower Horizontal. The number of pieces
will be determined by the length, and model of replace.
(Follow Typical building codes and practices when spacing).
Next, cut the Required Left and Right Vertical 2 x 4's in
accordance with Figure 2b.
Lastly, install the Two (2) Supplied Steel Headers 1" above
the replace throats. NOTE:  When this assembly is
in place, ensure ALL the required 1" clearance to
combustiblesaremaintained.
Figure 2b. Fireplace installation, (Ensure you maintain the 1" clearance to combustibles) Both Sides are Typical.
Step 4. As shown in Figure 2c; Cut a sheet of Non-
combustible Concrete Board to overlap the new 2 x 4's and
Non-combustible Header (front & rear face) See Figure 2b.
Place the Non-combustible wall board above the replace
throats, allowing 1/8" clearance from the rim above the
replace opening. Pre-drill pilot holes in the board with ⅛"
drill, secure to wood framing with Nails and use at heat
sheet metal screws to fasten the board to the metal header.
Figure 2c. Non-combustible Board over the Fireplace, (supplied by Montigo) Both Sides are Typical.
1"
Clearance
1"
Clearance
1” Clearance 1" Clearance
Non-combustible Header
(Supplied by Montigo)
2 X 4, (Top
Horizontal)
2 X 4, (Bottom
Horizontal)
2-pcs 2 x 4, (vertical)
Both Sides Typical
First wood stud
installed at 18”
from top of glass
Space supplied Non-Combustable
Header to allow 6” of Cement
board to be fastened to
2 X 4 fillers,
(Vertical) use
typical
building
practices
when
spacing
Non-Combustible cement board,
(Supplied by Montigo) or Equivalent
Pre-drill for sheet
metal screws to
fasten cement
board to
framing
⅛"
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
6"
Height

Page8
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Step5. As shown in Figure 2d; Cut standard Gyproc /
Drywall board to complete the installation of Both surrounds.
Fit the edges of the board to the rim around both replace
openings. Fasten the boards in place using standard
drywall screws.
Figure 2d. Fireplace installation (Cut the remainder of Gyproc / Wall board to complete the replace surrounds) Both Sides are Typical.
Figure 2e. Fireplace installation (Pre drill pilot holes with 1/8" drill and attach Cement Board to Non-combustible Header using Sheet metal
Screws). Both Sides are Typical.
Combustible Wallboard / Gyproc
or Equivelant (Top, Bottom & Sides)
Fasten Cement
Board to Non-
Combustable
Header using
Sheet Metal
Screws
As shown in Figure 2c; Pre-drill the Non-combustible
Cement Board with an 1/8" drill, secure to framing with
Nails and use at heat sheet metal screws to fasten the
board to the metal header.

Page9
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section3:InstallingthePowerVent
Figure 3a. Multi-elbow Venting Installations.

Multi-elbow installations are possible up to a maximum of
six 90° elbows.
Figure 3b. Downward Venting Installations.

Note: The downward vent run must not exceed 6' of vent run.
Figure 3. Typical straight Venting Installations.
Montigo supplies a variety of power venting options. The
location of the power vent should be selected and laid out
to provide the shortest possible run to an external wall or
through the roof. In the event that the external power vent
is not aesthetically acceptable or otherwise infeasible, an
in-line power vent can be utilized.
Section 3-1: Installing a Roof Mounted Vertical
Exterior Power Vent (EDVRSPV58)
This section applies to installations where the shortest
possible vent run is through the roof. Refer to Appendix
A -PowerVentlocations, to ensure the planned Power
vent location is acceptable. Once the vent location has been
established, please refer to the appropriate section below
for installation details.
Section 3-1-1: Venting Layout

Selection of components and details of venting lay out
should adhere to the following guidelines:
■ Ensure there is a minimum run of 2’ of straight pipe
before the power vent
■ 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
Venting Installation
V (Maximum Length) Max. # Elbows Elbow Angle
80 Feet 6 90°
Multi Elbow - Venting Installation
V1 + H1 + V2 + H2 + V3
(Maximum Length) Max. # Elbows Elbow Angle
80 Feet 6 90°
Multi Elbow - Venting Installation
V1 + H1 + V2 + H2 + V3
(Maximum Length) Max. # Elbows Elbow Angle
40 Feet 6 90°
V
Elbow 1
Elbow 2
Elbow 3
Elbow 5
Elbow 4
H2
H1
V1
V2
V3
Elbow 1
Elbow 2 Elbow 3
Elbow
H1
V1
D = 6’ foot
MAX
V3
H2
Elbow 4

Page10
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section 3-1-3: Installation of the EDVRSPV58
External roof mounted power vent module.
Refer to Appendix A - Power Vent locations, to ensure the
planned Vertical Power vent location is acceptable.
The EDVRSPV58F Rough-in Frame dimensions:
The EDVRSPV58 Power Vent dimensions:
Section 3-1-2: Venting Components
The following venting components and associated Montigo
part numbers are available for the EDVRSPV58:
A - Termination EDVRSPV58
C - Flex Sections PFL-1 (12" Section)
PFL-2 (24" Section)
PFL-3 (36" Section)
PFL-4 (48" Section)
D - Rigid Sections PEXT - 1 (12" m/f Section)
PEXT - 2 (24" m/f Section)
PEXT - 3 (36" m/f Section)
PEXT - 4 (48" m/f Section)
EDVRSPV58F
EPVH10 -10 foot power cord and harness
EPVH20 -20 foot power cord and harness
EPVH30 -30 foot power cord and harness
EPVH40 -40 foot power cord and harness
EPVH50 -50 foot power cord and harness
EPVH60 -60 foot power cord and harness
EPVH70 -70 foot power cord and harness
EPVH80 -80 foot power cord and harness
EPVH90 -90 foot power cord and harness
EPVH100 -100 foot power cord and harness
F - Power Cord
Harnesses:
E - Elbows PEL-90MM (m/m 90° Elbow)
PEL-90FF (f/f 90° Elbow)
PEL-90FM (f/m 90° Elbow)
PEL-45FM (f/m 45° Elbow)
PXT-20 (20" section)
B - Rough-in Frame
Connectionandinstallationoftheventcomponents
shouldadheretothefollowingguidelines:
■ 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 all sides to any
combustible material.
■ 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.
■ 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.
■ All exterior joints in venting should be sealed with
high heat silicone RV230.
Top View
Front View
Ø14”
8 1/2”
19 1/4”
Ø 1/2”
2”
18”
18”
Top View
Front View
Ø 8”
14”
6”
18”
18”

Page11
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Figure 4. Construction, Rough-in framing.
Step1.Construct a Vertical Chase for the termination
opening to meet the following requirements:
■ Opening Size must be: 14 1/2" x 14 1/2" x 18" Min. height.
Step2.Install the Vent pipe female end up, and 2" to 3"
MAX. from the top of the Constructed Chase. Also, at this
point install the Electrical harness, (EPVH-(10-100) that will
communicate with the Power Vent Module.
Figure4a.Installation, Vertical Vent pipe. 
Figure 4b. Installation of Rough-in Kit
Step3.Install the Power Vent Rough-in Kit. Pull wire
harness through the supplied hole in the bottom corner
of the rough-in box, and snap into the slot provided, 
gure 4b.
Figure 4c. (Fasten Rough-in Kit to framing)
Step4.Install fasteners around perimeter of Rough-in Kit.

Figure 4d. (Installed Stainless steel cover)

All venting material must be sealed with high heat
silicone sealant RV230. All venting material to be
Montigo flex pipe, with as few joints as possible.
All joints use MVA vent splice, sealed thoroughly
with silicone. Montigo will not be held responsible
for any water damage that may occur from not
installing the equipment as specified by this
document.
WARNING
XW2024
14½"14½"
18"
Vent Chase
Electrical Harness
with connection
2" to 3" Max.
Vent Pipe
Power Vent
Rough-in Kit
Electrical
Harness
Electrical Harness
Connerctor Location
Install Fasteners around
perimeter of Rough-in Kit

Page12
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Figure 4g. (Installation of Power Vent Module)
Install Power Vent
Module with Power
/ Communication
Harness
Vertical Roof
Top
Power Vent
Vertical Roof Top
Power Vent
Rough-in Kit
Step5.Install the Power Vent, Roof-top Stainless steel
cover over the Installed Rough-in Kit. (You can see the
Electrical harness connector in the top right corner).
Figure 4e. Figure 4f.
Step6.Install the Power Vent Module Power / communication
harness. Hold the Power Vent in close proximity of the
assembled Chase, (with stainless steel cover attached)
and plug in the Power Vent communication / Power Cord.
(Note the direction and orientation of the plug socket). (See
Figure 4e & Figure 4f)
Electrical Harness
from Power Vent
Step7.Install the Power Vent Module. Place the Power
Vent Module over the stainless steel cover ange and vent
pipe, aligning the Power Vent into nal position. Ensure the
Harness is placed down in the Rough-in box when placing
the Power Vent Module into place. The Power Vent Module
will sit ush with the stainless steel cover if installed correctly.
Figure4h.(InstalledPowerVentModule)
Step8.Install (3) three stainless steel fasteners around
Power Vent Module @120 degrees (penetrating through
the inner stainless steel vent cover)
Stainless Steel
Fasteners
CAUTION!
 Vent terminations can be very hot. The termination is to be installed higher than 7 feet above a public walkway.
 Do not obstruct, or attempt to conceal, the vent termination. These actions will aect the operation of the replace, and may be hazardous.
 In heavy snow areas, take extra care to prevent snow buildup from obstructing the vent termination.
■ Vent terminations can be very hot. The
termination is to be installed higher than 7 feet
above a public walkway.
■ Do not obstruct, or attempt to conceal, the vent
termination. These actions will affect the operation
of the fireplace, and may be hazardous.
■ In heavy snow areas, take extra care to
prevent snow buildup from obstructing the vent
termination.
CAUTION
XW2026

Page13
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section 3-2-1: Venting Layout
Selection of components and details of venting lay out
should adhere to the following guidelines:
■ Ensure there is a minimum run of 2’ of straight pipe
before the power vent.
■ 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.
Figure 5. Typical Venting Installations.

Multi-elbow installations are possible up to a maximum of
six 90° elbows.
Figure 5a. Multi-elbow Venting Installations.
Figure 5b. Downward Venting Installations.

Note: The downward vent run must not exceed 6' of vent run.
Section 3-2: Installing a Wall Mounted Vertical
Exterior Power Vent (EDVWSPV58)
This section applies to installations where the shortest
possible vent run is through an exterior wall. Refer to
Appendix A - Power Vent locations, to ensure the planned
Power vent location is acceptable. Once the vent location
has been established, please refer to the appropriate section
below for installation details.
Once the vent location has been established, please refer
to the appropriate section below for installation details.
All venting material must be sealed with high heat
silicone sealant RV230. All venting material to be
Montigo flex pipe, with as few joints as possible.
All joints use MVA vent splice, sealed thoroughly
with silicone. Montigo will not be held responsible
for any water damage that may occur from not
installing the equipment as specified by this
document.
WARNING
XW2024
Venting Installation
V + H (Maximum Length) Max. # Elbows Elbow Angle
100 Feet 6 90°
Multi Elbow - Venting Installation
V1 + H1 + V2 + H2 + V3 = H3
(Maximum Length) Max. # Elbows Elbow Angle
100 Feet 6 90°
Multi Elbow - Venting Installation
V1 + H1 + D + H2
(Maximum Length) Max. # Elbows Elbow Angle
40 Feet 6 90°
H
V
Elbow 1
Elbow 2
Elbow 3
Elbow 5
Elbow 4
Elbow 6
H3
H2
H1
V1
V2
V3
H2
H1
VD

Page14
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Venting Components
The following venting components and associated Montigo
part numbers are available for the EDVWSPV58:
Connectionandinstallationoftheventcomponents
shouldadheretothefollowingguidelines:
■ 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 all sides to any
combustible material.
■ 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.
■ 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.
■ All exterior joints in venting should be sealed with
high heat silicone RV230.
Installation of the EDVWSPV58 external wall
mounted power vent module.
Refer to Appendix A - Power Vent locations, to ensure the
planned Vertical Power vent location is acceptable.
A - Termination EDVWSPV58
C - Flex Sections PFL-1 (12" Section)
PFL-2 (24" Section)
PFL-3 (36" Section)
PFL-4 (48" Section)
D - Rigid Sections PEXT - 1 (12" m/f Section)
PEXT - 2 (24" m/f Section)
PEXT - 3 (36" m/f Section)
PEXT - 4 (48" m/f Section)
EDVWSPV58F
EPVH10 -10 foot power cord and harness
EPVH20 -20 foot power cord and harness
EPVH30 -30 foot power cord and harness
EPVH40 -40 foot power cord and harness
EPVH50 -50 foot power cord and harness
EPVH60 -60 foot power cord and harness
EPVH70 -70 foot power cord and harness
EPVH80 -80 foot power cord and harness
EPVH90 -90 foot power cord and harness
EPVH100 -100 foot power cord and harness
F - Power Cord
Harnesses:
E - Elbows PEL-90MM (m/m 90° Elbow)
PEL-90FF (f/f 90° Elbow)
PEL-90FM (f/m 90° Elbow)
PEL-45FM (f/m 45° Elbow)
PXT-20 (20" section)
B - Rough-in Frame
The EDVWSPV58 Power Vent dimensions:
The EDVWSPV58F Rough-in Frame dimensions:
Front View
Side View
14¾"
14 ⅛" Ø 5"
16¾"
15⅝"
14⅛"
Ø 8"
14"
3"
4⅝"
Top View
Front View
18¾"
18¾"

Page15
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Figure 6. Framing the Opening for Power Vent
14 1/2”
14 1/2”
(Opening)
(Opening)
Step2.Insert the Power Vent Rough-in Box as shown in
Figure 6a. Fasten the Box securely in place with Screws
or nails, Figure 6a. Apply exterior sheathing and nishing
if required.
Step3.Next, remove the bottom collar and conduit mounting
frame as shown Figure 6b. (Place removed hardware in a
handy location for re-assembly).
Figure 6a. Orientation, Placing the Power Vent Inner Box
Framing
Rough-in Frame
Fasteners
Figure 6b. Installation of Rough-in Kit


Step1. Construct a frame for the termination opening to
meet the following requirements:
■ Opening Size must be: 14 1/2" x 14 1/2".
Figure 6c. Installation of Power Vent Conduit
Power Vent Conduit
Strain Relief
Nut
Step4.Insert the conduit from the Power Vent Module into
the rough-in frame through the two top right entry holes.
Remove the nut from the supplied strain relief and place
as shown, Figure 6c.
Strain Relief
Figure 6d. (Installing Conduit connector & conduit mounting frame)
Power Vent Conduit
Strain Relief & tightened nut
Power Vent
Connector
Conduit
mounting
frame
Step5.Securely fasten bottom Collar pan into the Rough-in
frame using the existing hardware, (4-pcs). Tighten Strain
Relief nut onto Strain relief.
Step6.Pull Power Vent Connector, (from behind) half-way
through supplied hole in conduit mounting frame, and snap
into place, (notches in two plastic wing clips. Orientation
not critical).
Tightened hardware, 4-pcs.
Step7.Fasten Conduit mounting frame into place using
existing hardware, (6-pcs). (Coil conduit in behind cover.)

Page16
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section:
 Install the Power Vent. Place the Power Vent into the
Rough-in frame, aligning the Power Vent into nal position.
Ensure the Harness is placed down in the Rough-in box when
placing the Power Vent. (Secure the Power Vent in Place with
the supplied hardware).
Figure5f.
TOP of Power Vent,
(Note Quantity of
louvers).
Note louver
direction
Tightened
hardware,
4-pcs.
Communication
Harness.

All R-Series Residential are boxed and shipped as Top Vent
replaces. Should your installation specications require that
you install your Vent system on the Rear of the replace,
read the following instructions carefully.
1. Remove the eight machine screws that secure the
10" cover plate to the rear vent take off location of the
replace. 
2. Then, carefully Remove the 5" cover plate that is
installed on the inner rear vent take off location. 
.
3. Now, remove the Top vent 
ue Collars. Switch the Collars and Cover plates as
shown in, Figure 10.
Flue cap installation, Top Vented replace.


All R-Series Residential are shipped as Top vent replaces.
The fireplace will have installed a formed pressure
sensing tube. This tube which is installed at the factory is
manufactured from 1/4" aluminium tubing, Figure 11 It will
be required to remove the pre-installed 1/4" tube and Replace
with the supplied Rear vent tube / part as described below.
Aim the pressure sensing tubing (Top Vent or Rear Vent) as
shown in Figure 11 to activate the control System. 

Top Vent
Opening
Rear Vent Opening
Fitting installed
inside replace
Pressure sensing
tube, (Top Vent
conguration when
shipped). Replace
with the part for Rear
vent conguration.
Replace tube from top vent congu-
ration with Part supplied with the
replace for rear vent conguration.
Fireplace Air Proving switch tubing conguration.

When installing the Rear vent pressure sense tube, aim
into the rear vent opening the same way as pictured in
this installation, Figure 11. A loose tting of the are nut
will result in a malfunctioning or problematic replace
installation.
Flare Nut on (Top
& Rear, pressure
sensing tubing, (do
not overtighten).
Figure5g.

The R-SeriesResidential Control and Power Vent System
can be safely tested prior to nish framing the Fireplace.
This test can be done quickly and efciently to ensure all
systems function according to the design specications.
The replace should be installed on the rough-in frame,
Figure 6a with the Power Vent Module and the Vent
Termination connected.
5” Inner Flue Collar, Typ.
8” Outer Flue Collar, R320,
R420 (with gasket)
8” Flue Cover Plate,
R320, R420 (with gasket)
5” Flue Cover Plate, Typ.
All models (with gasket)
All models (with gasket)

Page17
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section4:Wiring
Figure 9. (Control Panel Overview)
Installation Of Electrical Supply
The R-Series Residential R320 & R420 Fireplaces are
supplied with an external electrical Control Panel pre-wired
by the factory. The power control box is connected to the
replace with a 20 foot long 6 conductor cable that will
communicate with the replace. The control panel should
be located in a location that would be accessible when the
replace in nished.
The power cord from the power vent module pugs into the
side of this panel. A 20 foot low voltage wire is attached
and connected to this panel as well. Connect a single pole
On/Off switch (Black and White) to these two wires at a
location of your choice, (See Installing the Remote Switch).
Installations in Canada must be electrically grounded in
accordance with CSA C22.1 Canadian Electrical Code Part
1 and/or Local Codes.
Installations in the USA must be electrically grounded in
accordance with local codes or, in the absence of local codes,
with the National Electrical Code, ANSI/NFPA 70-1987.
Installing The Remote Switch
The R-SeriesResidential R320&R420 Fireplacesmay
be connected to a wall switch or a hand-held remote. The
valve operates ona24Vcircuit.DONOT connect the gas
valve to an external circuit.
The external electrical panel supplied with the replace is
equipped with a 20 foot low voltage wire, for connecting to
a wall switch of your choice. Should you require a longer
switch wire, replace this wire to any length with a wire of
equal quality. Additional length are available upon request.
Figure 10. R-Series Residential Power Vent Module
Left-sideView
Power Vent
Speed Control Power Vent Speed Control
Right-sideView
LED Indicator
Fuse
110V Power Supply
Wall Switch 6 - conductor
communication
cable
Figure 11. (Remote Switch Wire connection)
Figure 8. (Fireplace to Control Panel Harness)
Gas Control
Wiring & Air
Proving
Switch
Vent Speed
Control
Terminal Block
Power Vent
Motor
Indicator
light
Fuse
Ignitor
operation
Lights
115V Power
Supply
Wall
Switch
Pre-purge
Module
Post-purge
Module
The valve has a 1/2 minute Time-On Delay to
clear All possible build up of burned gas within
the System.
After this Time-On Delay the fireplace will
proceed with the Initiated Start-Up Sequence has
completed.
CAUTION
XW2026
Wall Switch

Page18
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section:

Blk / Wht
Brn
Gas
Valve 1
LV Wall
Switch
Gnd Green
Wht / Blk
Blk / Wht
Wht / Blk
Red
Blu
Combustion
Air Switch Flue Gas
Switch
1 2 3 4 5 6 7 8
NC NO
Fireplace
Pre-purge
Time-On delay
Post-purge Module

If the information in these instructions is
not followed exactly, a fire or explosion
may result causing property damage,
personal injury or death.
WARNING
XW2008

Page19
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section5:InstallingtheGasLine
Figure14.Gas Inlet Supply location,
Fuel Consumption
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.
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:
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.
GAS CONNECTION
See Figure 14 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.
3”
1/2” gas
inlet
3”
Pressure Requirements
Gas Pressure Natural Gas Propane
Minimum Inlet Pressure 5.5" W.C. 11" W.C.
Manifold Presure 3.5" W.C. 10" W.C.
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 flame
of any kind to test for leaks. A fire or
explosion will occur, causing serious
injusy, property damage or death.
XW2030
DANGER
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
XW2032

Page20
R-Series R320-R420 Indoor Gas Fireplace
XG0770 - 020911

Section6:Finishing
Figure 16. Combustible mantles and facings. (Not to scale)
Fireplace Facing
When selecting the nish material for your replace, it is
important to remember the following:
If the surround of the replace is to be painted to match
the room decor, heat-resistant paint must be provided .
Also, 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 and access to the lower
compartment.
Mantels & Surrounds
National Canadian Gas Association mantel test requirements
are for re hazard prevention to combustible materials.
Please be aware; temperatures over the mantel will rise
above normal room temperature and walls above replace
may be hot to touch.
Only Steel Stud construction
permitted within the grey area
Top of
fireplace
Non-Combustible
Facing Material
Drywall / Combustible
Construction allowed
in shaded area
Combustible Construction
allowed in this area
Wood Header @ 18"
⅛" Clearance
to allow for
expansion
during
operation
18
17
XW2034
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, discolor-
ation or premature failure of T.V. radio,
and other electronic components.
CAUTION
When covering the upper metal
portion of the fireplace, (as shown,
Fig.16) 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.
CAUTION
XW2036