Montigo C34-DV Owner's manual

■Check local codes
and read all
instructions prior to
installation.
■Leave this manual
with the owner.
Gas Fireplace
C34-DV
Installation
Operation &
Maintenance
What To Do If You Smell Gas:
 Do not try to light any appliance.
 Do not touch any electrical switch; do not use any phone in your building.
 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.
Warning:
Improper installation, adjustment,
alteration, service or maintenance can
cause injury or property damage. efer to
this manual. For assistance or additional
information consult a qualified installer,
service agency or the gas supplier.
For Your Safety:
Do not store or use gasoline
or other flammable vapors
and liquids in the vicinity of
this or any other appliance.
Questions? Email us at [email protected] or visit our website at www.montigo.com.

Page 2
C34-DV Gas Fireplace
Part No. XG0117B
Introduction
Thank You for choosing a Montigo C-Series Fire lace.
About the C34 Fireplace:
The C34-DVincludes a 20,000 BTU dual burner with embers and a
five iece ceramic fibre logset. This model is available in four versions.
nC34DT-To Vent, Millivolt Pilot
nC34DR- Rear Vent, Millivolt Pilot
nC34DT-S- To Vent, Pilotless Ignition (STB)
nC34DR-S-Rear Vent, Pilotless Ignition (STB)
The C34-DV is rated for Natural Gas at 20,000 BTU/H (7.33 Kilowatts)
In ut or Pro ane at 20,000 BTU/H (7.33 Kilowatts) In ut.
How to use this manual:
This manual covers all models and unless otherwise s ecified, the
designation C34-DV refers to all models. Sections which are s ecific to a
articular model are marked with a symbol, lus the
a ro riate model number.
Warranty and Installation Information:
The Montigo warranty will be voided by, and Montigo disclaims any
res onsibility for, the following actions:
Modification of the fire lace and/or com onents including Direct-Vent
assembly or glass doors.
Use of any com onent art not manufactured or a roved by
Montigo in combination with this Montigo fire lace system.
Installation other than as instructed in this manual.
Consult your local Gas Ins ection Branch on installation requirements for
factory-built gas fire laces. Installation & re airs should be done by a
qualified contractor.
InstallationsinCanada must conform to the current CAN/CGAB-
149.1 and .2 Gas Installation Code and local regulations. If the o tional
air-circulating fan kit is installed, it must be electrically grounded in
accordance with CSAC22.1 Canadian Electrical Code Part 1 and/or
Local Codes.
InstallationsintheUSA must conform to local codes, or in the
absence of local codes to the National Fuel Gas Code, ANSIZ223.1-
1988. If the o tional air-circulating fan is installed, it must be grounded in
accordance with local codes or, in the absence of local codes, with the
National Electrical Code, ANSI/NFPA70-1987.
Table Of Contents
Introduction ............................................................................ 2
Installation
Installing the Fire lace Shell ........................................... 3
Installing the Gasline ....................................................... 4
The Remote Switch ........................................................ 4
Direct Vent Installation .................................................... 4
General Requirements ....................................... 4
Terminations ...................................................... 4
To Vent Models with horizontal venting ............. 6
To Vent Models with vertical venting ................. 8
Rear Vent Models .............................................. 9
Construction around the fire lace
Facing ............................................................. 11
Mantels and Surrounds.................................... 11
Wiring ....................................................................... 11
Removing and Installing the Door ................................. 12
Installing the Logset ...................................................... 13
Installing the Horizontal Trim ......................................... 13
Operation ........................................................................ 14 - 16
Maintenance ................................................................... 16 - 17
Warranty ................................................................................ 18
Appendix
A. Termination Locations .............................................. 19
B. Wiring for Pilotless Ignition (STB) Equi ed Units ...... 20
CAUTIONS
Due to its high o erating tem eratures, the a liance should
be located out of traffic & away from furniture and dra eries.
Children and adults should be alerted to the hazards of
the high surface tem erature, which could cause burns
or clothing ignition.
Young children should be carefully su ervised when
they are in the same room as the a liance.
Clothing or other flammable materials should not be
laced on or near the a liance.

Page 3
C34-DV Gas Fireplace
Part No. XG0117B
Installing The Fireplace Shell
The fire lace may be installed in any location that is free of air
conditioning ducts, electrical wiring and lumbing. Safety, as well as
efficiency of o eration, must be considered when selecting the fire lace
location. Try to select a location that does not interfere with room traffic,
has adequate ventilation, and offers an accessible athway for Direct
Vent installation. Refer to age 4 - VentInstallationfor more information.
The fire lace dimensions are shown below:
Installation
When installing a shelf over the to of the fire lace, the following
guidelines must be adhered to: For Rear Vent models (C34-DR), the
minimum clearance from the to of the fire lace to a shelf is 7". For To
Vent models (C34-DT), the minimum clearance is 15". (Minimum1"
clearancemuststillbemaintainedaroundtheventpipes.)
Figure 4. Framing for shelves over the fireplace.
To VentRear Vent
Figure 3. Corner framing dimensions.
Figure 2. Framing dimensions.
* When sheetrock is
not used behind the
fire lace, framing
de th may be
reduced to 13 3/4"
Framing
WARNING:
When this a liance is installed directly on car eting, tile
or any combustible material other than wood flooring, it
must be installed on a metal or wood anel extending the
full width and de th of the a liance.
To Vent
Front View Rear Vent
Clearances
These clearances a ly to all dimensions excepttheframedopening,
where the clearance to combustibles is 0". The C34-DVclearances to
combustible materials are:
Top-RearVent* 7"
Top-TopVent 15"
Back 0"
Flue 1"
Sides 1"
Floor 0"
Mantle** 6"
* Clearance from the to of the fire lace to a combustible
ceiling within the fire lace enclosure.
** Refer to age 10.
Un rotected combustible walls which are er endicular to the fire lace
o ening, must not roject beyond the shaded area shown in Figure 19b.
For rotection against freezing tem eratures, it is recommended that
outer walls of the chase be insulated with a va our barrier. This will
reduce the ossibility of a cold-air convection current on the fire lace.
Figure 1. Fireplace dimensions.

Page 4
C34-DV Gas Fireplace
Part No. XG0117B
ent Installation
This section covers the installation of direct venting and terminations.
Installation Requirements
C34-DV fire laces are certified for use with Montigo Premium
Series (5" / 8") venting com onents. The C34-DV Top Vent may
be used with Standard Series (4"/7")com onents on vertical vent
runs only.
Minimum 1" clearance to combustibles required for vent i es
Use only certified Montigo vent components. (Use of other arts will
void the Montigo warranty, and may im ede the o eration of the
fire lace.)
All joints must be secured with a minimum of two screws er joint
Vent terminations must not be recessed in walls or siding
Horizontal runs must be su orted by a minimum of two su orts
er horizontal run. A minimum of one screw on each side of
su ort is also required
Flex vent sections may be stretched u to 50% of their total length
(eg. a 24" section may be stretched to 36")
Maximum horizontal run for a flex section with no vertical rise is 3 feet.
Flex vent sections over 3 feet must fall within the limits set by the
venting gra h and must have a minimum vertical rise of 3 inches
er foot of flex.
Solid vent sections may be cut less than half way from the ta ered end
Vent Terminations
Selecting A Termination Location
Choosing your vent termination location will hel to determine whether
you need to use a to vent or rear vent fire lace. Figure 6, below,
shows ty ical fire lace locations and the venting o tions they rovide.
For a more detailed diagram of allowed termination locations, see
AppendixB.
Cautions:Cautions:
Cautions:Cautions:
Cautions:
Installing The Gas Line
The gas line must be installed before finishing the C34-DV Fire lace.
NaturalGas requires a minimum inlet gas su ly ressure of 5.5"
W.C. & a manifold ressure of 3.5" W.C. PropaneGas requires a
minimum inlet gas su ly ressure of 11" W.C. & a manifold ressure of
10" W.C. Provision must also be made for a 1/8" N.P.T. lugged ta ing
and be accessible for test gauge connection immediately u stream of the
gas su ly controls to the a liance. The fire lace gas connection and
the main o erating gas valve is located behind the removable brass trim
at the bottom of the unit and need only be attached to the gas line with an
a roved fitting, as required by the applicableinstallation codes.
Installation
Figure 6. Fireplace locations and vent terminations.
Note: After gas line is connected, eachappliance connection,
valve and valve train must be checked while under
normal o erating ressure with either a liquid solution, or
leak detection device, to locate any source of leak. Tighten
any areas where bubbling a ears or leak is detected until
bubbling sto s com letely or leak is no longer detected.
DO NOT use a flame of any kind to test for leaks.
Installing The Remote Switch
The C34-DV's gas valve, located behind the lower brass trim, may be
connected to a wall switch. The valve generates its own ower on a
millivoltcircuit. Use onlylow voltage wire,and DO NOT connect
any external ower to it.
Refer to Figure 26 for wiring requirements.
Note: The switch location must not exceed 30' from the fire lace.
Figure 5. Gas line access.
The a liance and its individual shutoff valve must be disconnected from
the gas su ly i ing system during any ressure testing of that system
at test ressures in excess of 1/2 sig (3.5 kPa).
The a liance must be isolated from the gas su ly i ing system by
closing its individual manual shutoff valve during any ressure testing of
the gas su ly i ing system at test ressures equal to or less than 1/2
sig (3.5 kPa).
Vent terminations can be very hot. If the termination
is less than 7 feet above a ublic walkway, it should
be fitted with a certified Montigo Heat Guard. (Part no.
PTKOG)
Do not obstruct, or attem t to conceal, the vent
termination. These actions will affect the o eration
of the fire lace, and may be hazardous.
In heavy snow areas, take extra care to revent snow
buildu from obstructing the vent termination.

Page 5
C34-DV Gas Fireplace
Part No. XG0117B
Installing Terminations with Built-In Frames
Installing Terminations with MSR Frames
12
12
1. Frame the termination o ening to 12" x 12".
2. Fasten the termination to the studs using a minimum of 4 screws.
11
11
1. Frame the termination o ening to 11" x 11".
2. Fasten the termination to the studs using a minimum of 4 screws.
Installing Terminations with MOSR Frames
1212
12
MOSR
1. Frame the termination o ening to 12" x 12".
2. Fasten the MOSR frame to the interior side of the studs using a
minimum of 4 screws.
3. Insert the termination into the MOSR frame as shown here, and
attach by screwing through the four ilot holes in the termination.
MSR
PTO-3
PTO-3F
PTO-3
PTKOG
1. Ensure that the two longmounting brackets are facing the bottom of
the termination. (See inset). This will rovide more heat rotection
at the to of the termination, where tem eratures are highest.
2. Attach to the face late of the termination using four sheet metal
screws.
Installing Heat Guards over Terminations
Installation

Page 6
C34-DV Gas Fireplace
Part No. XG0117B
Installation
Top ent enting Runs
For the C34-DV TopVent, there are two ty es of installations: A)
Through-The-Wall Installations and B) Vertical (Through-The-Roof)
Installations.
A) Through-The-Wall Installations
Before you install any venting, you must determine whether the venting
run will be acce table. Unacce table venting can affect the fire lace's
combustion.
The Venting Graph
Measure the vertical height from the fire lace hearth to the centre of the
termination and the horizontal run from the from the fire lace flue collar to
the wall flange of the termination. Plot on the Venting Gra h (Fig. 7) with
an 'X'.
If the 'X' falls on or above the to boundary of the shaded area, the
installation is acce table.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 84" and the horizontal
run to the wall flange of the vent termination is 36", this would be
an acce table installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 90" and the horizontal
run to the wall flange of the vent termination is 120", this would be
an acce table installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fire lace is 72" and
the horizontal run to the wall flange of the vent termination is 84",
this would NOT be an acceptable installation.
Figure 7. Venting Graph
Figure 8. Heat Shield. Install by sliding over the vent pipe where it
passes through combustible construction.
Heat Shields
Due to high flue tem eratures, heat shields are required on all C34-DV
installations (exce t those with vertical
terminations) at the oint where the
venting connects to the termination. With
the heat shield, vent clearances can be
maintained at 1".
012 24 36 48 60 72 84 96 108 132120 144 156 168 180
Horizontal Run (in.)
Hearth
0
12
24
36
48
60
72
84
96
108
Available Top Vent Components
The following venting com onents are available for the C34-DV Top
Vent:
A - Termination PTO-3 (3" length)
PTO-3F (3" length)
B - Stucco Kits MSR (stucco frame)
MOSR (stucco can)
BSR (brick can)
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)
PEXT-6 (72" m/f section)
E - Elbows PEL-90MM (m/m 90° elbow)
PEL-90FF (f/f 90° elbow)
PEL-90FM (f/m 90° elbow)
NOTES: All dimension lengths for vertical or horizontal runs are
measured from center of the vent i e.
Venting runs must fall within the limits set by the venting
gra h (see Figure 7).

Page 7
C34-DV Gas Fireplace
Part No. XG0117B
Installation
Termination
Example 1:
For our shortest venting configuration use com onents A and F (see
Figure 9a).
Figure 9a. ypical op Vent installation. If the 90° elbow is
installed directly on the fireplace, the height to the
center of the termination is 43½".
Horizontal Venting
Figure 9b. ypical op Vent installation. he solid sections can be
used in various combinations to obtain the desired vent
run. he vent run must fall within the limits set by the
venting graph.
90° Elbow
PEXT Section
Example2:
Rigid sections and an elbow used in conjunction with 3 ft. flex section
(PFL-3) will, when extended in a five foot chase, allow for a maximum
horizontal run of twelve and one-half feet from the centre of the fire lace
to outside wall and a minimum of 7'6" when retracted in o osite direction
(see Figure 10 and 11).
"C" flex sections and "D" rigid sections may be used in conjunction with
one another to obtain different ossible horizontal length installations.
NOTE:Flex section with no vertical rise must not exceed maximum
horizontal length of 3 feet (seeFigure12). Flex runs over 3 feet must fall
within the limits set by the venting gra h, and must have a minimum
vertical rise of 3" er foot of flex.
Figure 10. Extended Installation using a combination of solid and
flex venting. Use the vent graph to determine your
allowable run, then select appropriate components.
Figure 11. Retracted Installation using a combination of solid and
flex venting. Use the vent graph to determine your
allowable run, then select appropriate components.
Figure12. Horizontal flex installation with no vertical rise.
Hearth
Termination
Exterior
Wall
3' max.
Flex Section
Hearth
Flex Section Termination
Exterior
Wall
Solid Sections
Hearth
Flex Section
Solid Sections Termination
Exterior
Wall
150" max.
30" max.
RigidSection
PEL-90F/F Elbow
RigidSection

Page 8
C34-DV Gas Fireplace
Part No. XG0117B
Storm collar
Support ring
MEXT
Solid Section
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support plate
Firestop
Firestop
2' min.
MXT-10
Adaptor
MEXT
Flue
Collar
2' min.
Storm collar
Support ring
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support plate
Firestop
Installation
B. Vertical (Through-The-Roof) Installations
5/8" with option for 4/7"
■Vertical rise >12' can be reduced
■Vertical Terminations must be installed:
•minimum 2' (two feet) above the highest oint where
vent asses through the roof.
•minimum 6' (six feet) from a mechanical air inlet
•minimum 3' (three feet) from a ara et wall.
■Maximum vent height is 30 feet above fire lace.
Note: Flame characteristics will change if the maximum vent height is
used.
■Minimum clearances 1" from vent to all combustible materials must be
maintained.
Figure13.a Straight, vertical venting using required adaptor.
■A maximum of two offsets with 90° bends may be made and shall not
exceed total length of 25% of the vertical vent height, when measured
center to center of i ing.
Exam le: Ty ical vent installation.
20' vertical vent
2 - 2' offsets required
25% of 20' = 5' max. offset allowed
This venting configuration meets requirements.
Figure 14a. Vertical venting with 1 offset.
30'max.
30'max.
Rigid Section
A
A.Male/Female
B.Female/Female
C.Male Flue Collar
B
C
Figure 13b. Reducing Vertical Vent from 5/8" to 4/7".
Vent Restrictors
When venting vertically, Vent Restrictors may be added to enhance the
burn characteristics of the fire lace.
Part Size 5"/8" Venting 4"/7" Venting
A - Termination n/a PVTK-1 MVTK-1
B - Flex sections 12" length PFL-1 MFL-1
24" length PFL-2 MFL-2
36" length PFL-3 MFL-3
48" length PFL-4 MFL-4
C - Solid sections 12" length PEXT-1 MEXT-1
24" length PEXT-2 MEXT-2
36" length PEXT-3 MEXT-3
48" length PEXT-4 MEXT-4
D - Support Ring
& Plate PSPXT-8 MSPXT-7
E - Firestop PS-8 FS-7
F - Roof Flashing (1/12-7/12 pt.) PRF-7 MRF-7
(7/12-12/12 pt.) PRF-12 MRF-12
G - Adaptor/ (5"/8" to 4"/7") PVA5487
Vent Reducer

Page 9
C34-DV Gas Fireplace
Part No. XG0117B
Installation
2. 45° Corner Installation.
Attach an PEL-45 (45° elbow) directly onto the flue collar. Cut the
PXT-20 to suit, and attach it to the PEL-45. Slide the fire lace into
osition and attach to the termination.
Heat Shields
Due to high flue tem eratures, heat shields are required on all C34-DV
installations (exce t those with vertical terminations) at the oint where
the venting connects to the termination. With the heat shield, vent
clearances can be maintained at 1". *Heat Shields are included
See Figure 8.
1. Straight Installation.
The height from the hearth to the center of the termination is 28
3/8". C34-DV Rear Vent versions are su lied with a 20" extension
i e (PXT-20) with female/female connections. For shorter
installations, cut the PXT-20 to the desired length.
For extended installations, use the PXT-20 section as su lied for a
20" vent run.
Flue Collar
Heat Shield
EXT-18
Termination
Figure 15. Extended installation.
Heat Shield
EXT-18
Termination
EEL-45
Elbow
FlueCollar
Figure 16. Corner installation.
3. Corner Installation — 45° or less.
Use an PTO-3 termination and an PFL-1 or PFL-2 (12" or 24"
com ressed length) and a frame, if a ro riate. Flex may be turned
to obtain desired degree of angle required but must not exceed 45°.
Figure 17. Flex installation.
Heat Shield
Termination
Flex
Section
Flue Collar
PXT-20
PXT-20(cut to length)
PEL-45
Figure 14b. Vertical venting with 2 offsets.
2' min.
2'
Storm collar
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support straps or
support plate & ring
Firestop
Firestop
Firestop
Support plate
& ring
30'max.
Rear ent enting Runs
The C34-DVRearVenthas three ossible installations which do not
require vertical lift:
Note: For Rear Vent models, maximum horizontal run with no
vertical lift must never exceed 20".

Page 10
C34-DV Gas Fireplace
Part No. XG0117B
Installation
B. Multi-Elbow Installations
For more diffiicult installation situations, the C34-DV Rear Vent may be
installed with two — 90° elbows and u to 15' of horizontal run. If using
this installation o tion, you must adhere to the following guidelines:
■the first 90° elbow must be laced directly on the flue collar
■you must have a minimum vertical lift of 50" (measured from the
hearth)
■your vent run must fall within the limits set by Figure 18a
Before you install any venting, you must determine whether the venting
run will be acce table. Unacce table venting can affect the fire lace's
combustion.
The Venting Graph
Measure the vertical height from the fire lace hearth to the centre of the
termination and the horizontal run from the from the fire lace flue collar to
the wall flange of the termination. Plot on the Venting Gra h (Fig. 18a)
with an 'X'.
If the 'X' falls on or above the to boundary of the shaded area, the
installation is acce table.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 84" and the horizontal
run to the wall flange of the vent termination is 36", this would be an
acce table installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 90" and the horizontal
run to the wall flange of the vent termination is 126", this would be
an acce table installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fire lace is 78" and the
horizontal run to the wall flange of the vent termination is 108", this
would NOT be an acceptable installation.
Figure 18a. C34-DV Rear Vent Venting Graph
012 24 36 48 60 72 84 96 108 132120 144 156 168 180
Horizontal Run (in.)
Hearth
0
12
24
36
48
60
72
84
96
108
Installation Of Rear ent D
C34-DV Rear Vent versions are su lied with an PXT-20 (female/
female) section. In addition, the following venting com onents are
available for Rear Vent installations:
A - Termination PTO-3 (3" length)
PTO-3F (3" length)
B - Stucco Kits MSR (stucco frame)
BSR-4 (4" brick frame)
BSR-6 (6" brick frame)
MOSR (stucco can)
C - Flex sections PFL-1 (12" section)
PFL-2 (24" section)
PFL-3 (36" section)
PFL-4 (48" section)
D - Solid sections PEXT-1 (12" section)
PEXT-2 (24" section)
PEXT-3 (36" section)
PEXT-4 (48" section)
E - 90 degree elbow PEL-90MM (m/m 90° elbow)
PEL-90FF (f/f 90° elbow)
PEL-90FM (f/m 90° elbow)
PEL-45FM (f/m 45° elbow)
Figure 18b. Multi-elbow installation. Distance 'H' must be a
minumum of 50". he vent run must comply with figure
18a.
NOTES: All dimension lengths for vertical or horizontal runs are
measured from center of the vent i e.
Venting runs must fall within the limits set by the venting
gra h (see Figure 18a).
8"
H
L
18"