Montigo R520-ST Instruction manual

www.montigo.com
f i r e f e a t u r e
XG0773 Canadian Heating Products Inc. Langley, BC V4W 4A Montigo Del Ray Corp. Ferndale, WA 98248 032211
For Your Safety:
Do not store or use gasoline or other ammable vapors and liquids in the
vicinity of this or any other appliance.
Safety Notice:
Glass doors on gas replaces are extremely hot while the replace is on and remain
hot even after the replace has been turned off. Safety screens are available and
can reduce the risks of severe burns. Please keep children away from the replace
at all times.
®
C US
Warning:
Improper installation, adjustment, alteration, service or maintenance can cause
injury or property damage. Refer to this manual. For assistance or additional
information consult a qualied installer, service agency or the gas supplier.
R620-PV Single-side Shown
• Installer: Leave this manual
with the appliance.
• Consumer: Retain this
manual for future reference.
• 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 re department.
Installation and service must be
performed by a qualied installer,
service agency or the gas supplier.
Warning: If the infor-
mation in these instructions is not
followed exactly, a re or explosion
may result causing property dam-
age, personal injury or death.
WHAT TO DO IF YOU SMELL GAS
Installation Operation & Maintenance Manual
Check local codes and read all instructions
R520-ST
Indoor
R620-ST
Indoor
C-View-ST Residential Fireplace

Page 2
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Section 4: Wiring ................................................................... 17
Fireplace A/C ..................................................... 17
Remote Switch .................................................. 17
Main Wiring Schematic ........................................ 18
Conduit & Wire clearances .................................. 18
Section 5: Installing the Gas Line .......................................... 19
Section 6: Finishing ............................................................... 20
Section 7: Installing and Removing the Door ........................ 21
Section 8: Installing the Firestones ........................................ 22
Section 9: Operation
Start-up Sequence ................................................ 22
Honeywell HSI Ignition System ............................... 23
Start-up Sequence SIT-IPI Gas valve ...................... 24
Maintenance ...................................................................25 - 26
General ................................................................ 25
Cleaning .............................................................. 25
Gas control valve Honeywell HSI ............................ 25
Troubleshooting ................................................... 26
Honeywell HSI Gas Control Valve................... 26
SIT- IPI Electronic Gas Control Valve ............. 26
Appendix
A. Power Vent Locations ...................................27 - 28
EPVRR Vertical Power Vent ..................................28
EPVRW Horizontal Power Vent .............................28
B. Warranty ............................................................ 29
C. State of Massachusetts. ...................................... 30
Congratulations
Safety Alert Key
Introduction ............................................................................... 3
Models............................................................................ 3
Installation
Before you Start ............................................................. 4
Pre-Installation Checklist................................................ 4
Understanding the Basic Operation of the replace....... 4
Section 1: Installation Overview and Product Dimensions ...... 5
▪ Section 1-1-1: Clearances .......................................... 5
Section 2: Framing the Fireplace ........................................6 - 8
Section 3: The R-View-ST Power Vent System ................9 - 19
Section 3-1: Installing the EPVRR Power Vent ............. 9
▪ Section 3-1-1: Venting Layout ...................................... 9
▪ Vertical Vent
Typical Vertical Vent ..............................................9
Multi-Elbow Vertical Vent ......................................9
Downward Vertical Vent ........................................9
▪ Section 3-1-2: Venting Components ........................... 10
▪ Section 3-1-3: Installation of the EPVRR ..............10 - 12
Section 3-2: Installing the EPVRW Vent ..................... 13
▪ Section 3-2-1: Venting Layout .................................... 13
▪ Horizontal Vent
Typical Horizontal Vent ........................................13
Multi-Elbow Horizontal Vent ................................13
Downward Horizontal Vent..................................13
▪ Section 3-2-2: Venting Components ........................... 14
▪ Section 3-2-3: Installation of the EPVRW .............14 - 16
Warning:
Read this manual before installing, operating or troubleshooting this appliance.
Please retain this owner's manual for future reference.
Table of Contents

Page 3
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
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 model described below. Refer to your model nameplate to verify
included options.
Model: R520-ST
Gas Type: Natural Gas
Gas Rating: 80,000 BTU/H (23.4 Kilowatts) Input
Venting Type: Top dedicated power vent
Burner Type: Contemporary linear burner
Ignition Type:
Honeywell Electronic (HSI)
SIT Electronic Ignition (IPI)
Model: R620-ST
Gas Type: Natural Gas
Gas Rating: 100,000 BTU/H (29.3 Kilowatts) Input
Venting Type: Top dedicated power vent
Burner Type: Contemporary linear burner
Ignition Type:
Honeywell Electronic (HSI)
SIT Electronic Ignition (IPI)
Safety Alert Key:
• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.
• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE: Used to address practices not related to personal injury.
• Important: Used to address practices not related to personal injury.
Introduction
WARNING
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS UNTIL
COOLED.
NEVER ALLOW CHILDREN TO
TOUCH GLASS.
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.

Page 4
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
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 : Roof Mounted
(EPVRR) or Wall Mounted (EPVRW)
Lay out the Vent run; calculating the required elbows and straight
runs of 5"/10" flex or rigid pipe
Your termination location should be selected to provide the
shortest possible vent run
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.
Installation
WARNING!
When this appliance is installed directly on any combustible
material other than wood ooring, it must be installed on a
metal or wood panel extending the full width and depth of
the appliance.
IMPORTANT MESSAGE: SAVE THESE INSTRUCTIONS
The C-View Residential R520-ST & R620-ST 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:
INSTALLATION AND REPAIRS SHOULD BE DONE
BY AN AUTHORIZED SERVICE TECHNICIAN. THE
APPLIANCE SHOULD BE INSPECTED BEFORE USE
AND AT LEAST ANNUALLY BY A PROFESSIONAL
SERVICE TECHNICIAN. 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 THE FIREPLACE ARE KEPT CLEAN.
CAUTION!
Due to its high operating temperatures, the appliance should
be located out of trafc & 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 ammable materials should not be
placed on or near the appliance. Understanding the Basic Operation of the
Residential R520-ST & R620-ST replace
The control compartment of this replace is located in the bottom of
the replace right below the burner system. All models will be sup-
plied 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.

Page 5
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
WARNING!
The C-View Residential R520-ST & R620-ST are power vented replace
systems. Under no circumstances can these model be installed without a
power vent module.
For regular Horizontal vent installation use 5"/10" model EPVRW with the
rough-in kit, EPVRWF for the R520-ST & R620-ST.
For regular Vertical vent installation use 5"/8" model EPVRR with the
rough-in kit, EPVRRF for the R520-ST & R620-ST.
Section 1: Installation Overview and Product Dimensions
Please review the Pre-Installation Checklist on Page 4 for general information on preparing for a successful installation of your replace.
The C-View Residential R520-ST & R620-ST replaces 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.
The replace dimensions are shown below:
Top View
Front View RH-Side View
Figure 1. Fireplace dimensions.
Installation
H
I
C
L
C
L
Section 1-1-1: Clearances
To ensure the C-View Residential R520-ST and R620-ST Fireplaces
operate safely, all models must maintain the following clearances.
** See Section 6: Finishing for details
Unprotected combustible walls which are perpendicular to the replace
opening, must not be closer to the replace than the required 6" clearance.
E (Opening)
D
(Opening)
A (Width)
B
(Height)
C
J
AB
R520 23 5
10
R620 23 5
10
18
18
12
12
513
7
/
85
/
8
5
13
7
/ 85
/
8
1
/ 41
/
8
45 15
1
/
41
/
8
45 15 73
61
86 3
/
4
74 3
/ 4
CDEFGHIJKLMN
25
/ 8
25
/
8
3
/
4
34
21
21
3
/ 4
3
/
4
/
1
/
8
1
/
8
1
/ 4
1
/ 4
47
47
7
/
8
78
/
O
15
15
18
18
/
/
R520-ST
Top - Top Vent 26”
Sides 3”
Floor 0"
Mantel * * 6"
R620-ST
26”
3”
0"
6"
OP
L
N
M
F
G
(Overall
Height)
K
P
4⅞"
4⅞"

Page 6
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Q (Opening) both sides typical
R (Opening)
both sides typical
U
3/4”
Plywood
Platform
Section 2: Framing
Installation
Figure 2. Fireplace installation, (Rough Frame-In dimensions) Both Sides are Typical.
Step 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 location and room to 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 botttom), Figure 2a. then secure in place with 1/4" wood screws.
Step 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.
Figure 2a. Fireplace installation, (Inlet Gas & Power Vent) .
Step 3. Back-framing the Fireplace (Typical Both sides).
Back -frame in the replace using typical framing practice, see Figure 2b 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 is installed ush to the glass viewing area.
1/2”
Supply Gas
connection
Inta
k
e / Ex
h
aust
Venting
Both
Sides
Typ
Max Platform
Ht.
Ceiling
Ht
24" 8'
48" 10'
Framing Dimensions
Model# Q R U
R-Series R520 80¾" 50" 23¾"
R-Series R620 92¾" 50" 23¾"

Page 7
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
b bl
h
d
Installation
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 as shown in Figure 2b. Next, cut the Required quantity of short ller 2x4's under the lower Horizon-
tal. Follow Typical building codes and practices when spacing. Next, cut the Required Left and Right Vertical 2 x 4's as shown in Figure 2b.
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.
Figure 2b. Fireplace installation, Both Sides are Typical.
Step 4. Installation of the RHS 102 heat shield
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.
See the detail of the RHS 102 on the following page.
1” clearance
1” clearance
Non-Com usti e ea er
(supplied by Montigo)
2-pcs 2 x 4 (vertical)
Both Sides Typ
2 x 4, (Top
horizontal)
2 x 4, (Bottom
horizontal)
Both
Sides
Typ
(vertical)
use Typical
building
practices
when
spacing.
RHS 102
Distance between 2 x 4's
R520 = 71½"
R620 = 83½"

Page 8
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Installation
Figure 2c. Montigo supplied RHS 102 required as venting
passes through the rst adjacent ceiling or wall for horizontal
vent runs

Page 9
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Figure 3a. Multi-elbow Venting Installations.
Multi-Elbow Installations
Multi-elbow installations are possible up to a maximum of six 90°
elbows.
Figure 3b. Downward Venting Installations.
Downward Vertical Venting
Note: The downward vent run must not exceed 6' of vent run.
Installation
Max V1 + H1 + D + H2 + V3 Max Elbows
40’ feet six 90
Section 3: Installing the Power Vent
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.
Section 3-1: Installing a Roof Mounted Vertical Exterior Power
Vent (EPVRR)
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.
Elbow 1
Elbow 2 Elbow 3
Elbow
H1
V1
D = 6’ foot
MAX
V3
H2
Elbow 4
Figure 3. Typical straight Venting Installations.
Max V Max Elbows
120’ feet N/A
,
Max V1 + H1 + V2 + H2 + V3 Max Elbows
100’ feet six 90
Elbow 1
Elbow 2
Elbow 3
Elbow 5
Elbow 4
H2
H1
V1
V2
V3

Page 10
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Section 3-1-3: Installation of the EPVRR external roof
mounted power vent module. Refer to Appendix A - Power
Vent locations, to ensure the planned Vertical Power vent location is
acceptable.
Installation
The EPVRRF Rough-in Frame dimensions:
Top View
Front View
Top View
The EPVRR Power Vent dimensions:
Front View
Ø14”
8 1/2”
19 1/4”
Ø 1/2”
2”
18”
18”
Ø 8”
14”
6”
18”
18”
Section 3-1-2: Venting Components
The following venting components and associated Montigo part
numbers are available for the EPVRR:
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.
A - Termination EPVRR
C - Flex Sections RFL-1 (12" Section)
RFL-2 (24" Section)
RFL-3 (36" Section)
RFL-4 (48" Section)
D - Rigid Sections REXT - 1 (12" m/f Section)
REXT - 2 (24" m/f Section)
REXT - 3 (36" m/f Section)
REXT - 4 (48" m/f Section)
EPVRRF
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 REL-90MM (m/m 90° Elbow)
REL-90FF (f/f 90° Elbow)
REL-90FM (f/m 90° Elbow)
REL-45FM (f/m 45° Elbow)
RXT-20 (20" section)
B - Rough-in Frame

Page 11
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
WARNING!
All venting material must be sealed with high heat silicone sealant
RV230. All venting material to be Montigo ex pipe, with as few
joints as possible. All joints use MVA vent splice, sealed thoroughly
with silicone.
WARNING!
Montigo will not be held responsible for any water damage
that may occur from not installing the equipment as specied
by this document.
Installation
Figure 4. Contruction, Rough-in framing.
14 1/2”
14 1/2”
18”
14 1/2" 14 1/2"
18"
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.
Vent Pipe
Vent Chase
Electrical Harness
with Connection
2 to 3” MAX
Figure 4a. Installation, Vertical Vent pipe. (female end top end).
Figure 4b. Installation of Rough-in Kit
Electrical Harness
Power Vent
Rough-in Kit
Electrical Harness
Connector Location
Inset
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, (See gure 4b inset).
Figure 4c. (Fasten Rough-in Kit to framing)
Install Fasteners around
perimeter of Rough-in Kit
Step 4.
Install fasteners around perimeter of Rough-in Kit. (Holes sup-
plied for ease of installation)
Figure 4d. (Installed Stainless steel cover)
Installing the external roof mounted power vent module

Page 12
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Installation
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 con-
nector 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 orienta-
tion 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 affect 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.

Page 13
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Installation
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
Multi-elbow installations are possible up to a maximum of six 90°
elbows.
Figure 5a. Multi-elbow Venting Installations.
Figure 5b. Downward Venting Installations.
Downward Vertical Venting
Note: The downward vent run must not exceed 6' of vent run.
Max V + H Max Elbows
100’feet six 90
Max V1 + H1 + V2 + H2 + V3 + H3 Max Elbows
100’ feet six 90
WARNING!
All venting material must be sealed with high heat silicone sealant
RV230. All venting material to be Montigo ex pipe, with as few
joints as possible. All joints use MVA vent splice, sealed thoroughly
with silicone.
WARNING!
Montigo will not be held responsible for any water damage
that may occur from not installing the equipment as specied
by this document.
Section 3-2: Installing a Wall Mounted Vertical Exterior Power
Vent (EPVRW)
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 accept-
able. Once the vent location has been established, please refer to the
appropriate section below for installation details.
Max V1 + H1 + D + H2 Max Elbows
40’ feet six 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
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Ø 8”
14”
3”
4 5/8"
Installation
Section 3-2-2: Venting Components
The following venting components and associated Montigo
part numbers are available for the EPVRW:
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.
Section 3-2-3: Installation of the EPVRW external wall
mounted power vent module. Refer to Appendix A - Power
Vent locations, to ensure the planned Vertical Power vent location is
acceptable.
Front View
Side View
The EPVRW Power Vent dimensions:
Ø 5.0"
14 3/4”
14 1/8” Ø 5”
16 3/4”
15 5/8”
14 1/8”
Top View
Front View
The EPVRWF Rough-in Frame dimensions:
18 3/4"
18 3/4"
A - Termination EPVRW
C - Flex Sections RFL-1 (12" Section)
RFL-2 (24" Section)
RFL-3 (36" Section)
RFL-4 (48" Section)
D - Rigid Sections REXT - 1 (12" m/f Section)
REXT - 2 (24" m/f Section)
REXT - 3 (36" m/f Section)
REXT - 4 (48" m/f Section)
EPVRWF
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 REL-90MM (m/m 90° Elbow)
REL-90FF (f/f 90° Elbow)
REL-90FM (f/m 90° Elbow)
REL-45FM (f/m 45° Elbow)
RXT-20 (20" section)
B - Rough-in Frame

Page 15
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
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
Installation
Installing the external wall mounted power vent module
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 hard-
ware, (6-pcs). (Coil conduit in behind cover.)

Page 16
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Installation
Step 8.
Install the Power Vent Power / communication harness. Hold the
Power Vent in close proximity of the assembled Rough-in Kit,
and plug in the Power Vent communication / Power Cord. (Note
the direction and orientation of the pins inside the Power Vent
connector, snap together). (Figure 6f).
Step 9.
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 6f. (Installation of Power Vent communication harness)
TOP of Power Vent,
(Note Quantity of
louvers).
Note louver
direction
Tightened hardware,
4-pcs.
Communication
Harness.
Figure 6g. (Completed Installation of Power Vent)
Figure 6e. (Assembled Rough-in Kit)
Tightened hardware, 6-pcs.
Installed Power Vent
Connector
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 affect 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.

Page 17
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Installation
Section 4: Wiring
Installation
CAUTION!
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 replace will proceed with the Initi-
ated Start-Up Sequence has completed.
Figure 9. (Control Panel Overview)
Gas Control
Wiring & Air
Proving
Switch
Vent Speed
Control
Terminal Block
Power Vent
Motor
Indicator
light
Fuse
Ignitor
operation
Lights
110V Power
Supply
Wall
Switch
Pre-purge
Module Post-purge
Module
Installation Of Electrical Supply
The C-View Residential R520-ST & R620-ST Fireplaces are sup-
plied 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 accord-
ance with local codes or, in the absence of local codes, with the
National Electrical Code, ANSI/NFPA 70-1987.
Installing The Remote Switch
The C-View Residential R520-ST & R620-ST Fireplaces may be
connected to a wall switch or a hand-held remote. The valve oper-
ates 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.
Wall Switch
Figure 10. C-View 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)

Page 18
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Installation
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
WARNING! If you do not follow these instructions exactly, a re or
explosion may result causing property damage, personal injury or loss of life.
Figure 12. C-View Residential R520-ST & R620-ST Wiring Schematic
Figure 12b. Conduit and Wiring Clearances.
Conduit & Wiring clearances
Connect the wiring to the replace as outlined in the C-View Resi-
dential R520-ST & R620-ST schematic, gure 12. Connect the
wiring to the Linear power vent 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.
1” Clearance

Page 19
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
Installation
Installation
Section 5: Installing the Gas line
Figure 14. Gas Inlet Supply location, (Right-hand side of replace).
Note: After gas line is connected, each appliance connection,
valve and valve train must be checked while under normal
operating pressure with either a liquid solution, or leak
detection device, to locate any source of leak. Tighten any
areas where bubbling appears or leak is detected until
bubbling stops completely or leak is no longer detected.
DO NOT use a ame of any kind to test for leaks.
WARNING!
When pressure testing the replace, Gas line, and input system
follow the appropriate local codes or your area. DO NOT
connect the replace to pressures in excess of 1/2lb. This will
damage the gas control valve.
Section 5-1: FUEL CONVERSION
Verify that your replace is compatible with your available gas
type. (Natural Gas or Propane shown by "N" or "L" in your
model number
If gas type is not compatible, contact your local Montigo
representative to purchase a conversion kit.
Conversion kits must be installed by a qualied service technician.
Section 5-2: GAS PRESSURE
Optimum appliance performance requires proper input pressures.
Gas line sizing requirements will be determined in ANSI Z221.3
National Fuel Gas Code in the USA and CAN/CGA B149 in
Canada.
Propane
11in. w.c.
10in. w.c.
Gas Pressure Natural Gas
5.5in. w.c.
3.5in. w.c.
Minimum inlet pressure
Manifold pressure
The manifold outlet pressure is set from the factory to the
appropriate pressure but should be veried.
To check pressures, control valves have a provision to remove
a 1/8” N.PT. plug to be tted with a hose barb.
Montigo requires a service shut off valve be located in an
accessible location to isolate the gas supply.
Only install gas shut-off valves approved for use by the state,
province, or other governing body in which the replace is being
installed.
Section 5-3: GAS CONNECTION
See Figure 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”

Page 20
R520-ST & R620-ST Power Vent Indoor Gas Fireplace
Part No. XG0773 - 032211
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
NOTE: 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.
Warning:
We recommend careful consideration be given to the effects of elevated
mantel temperatures which may be in excess of product design, for
example: candles, plastic or pictures. This can cause melting, deformation,
discoloration or premature failure of T.V. and radio components.
WARNING!
We recommend careful consideration be given to the effects of
elevated mantel temperatures which may be in excess of product
design, for example: candles, plastic or pictures. This can cause
melting, deformation, discoloration or premature failure of T.V.
radio, and other electronic components.
WARNING!
When covering the upper metal portion of the replace, (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.
Installation
Section 6: Finishing
Installation
12 11 10 9 8 7 6 5 4 3 2 1
Combustible
construction allowed
in shaded area
Start of combustible
framing
Combustible
facing material
Top of
fireplace
Glass
Non-combustible
headers supplied by
Montigo (may be
placed where required
for fastening facing)
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1