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.

Page 2
C34-DV Gas Fireplace
Part No. XG0117C
Introduction
Thank You for choosing a Montigo C-Series Firep ace.
About the C34 Fireplace:
The C34-DVinc udes a 20,000 BTU dua burner with embers and a
five piece ceramic fibre ogset. This mode is avai ab e in four versions.
C34DT-Top Vent, Mi ivo t Pi ot
C34DR-Rear Vent, Mi ivo t Pi ot
C34-DT-I-Top Vent, Intermittent Pi ot (HSI)
C34-DR-I-Rear Vent, Intermittent Pi ot (HSI)
The C34-DV is rated for Natura Gas at 20,000 BTU/H (7.33 Ki owatts)
Input or Propane at 20,000 BTU/H (7.33 Ki owatts) Input.
How to use this manual:
This manua covers a mode s and un ess otherwise specified, the
designation C34-DV refers to a mode s. Sections which are specific to a
particu ar mode are marked with a symbo , p us the
appropriate mode number.
Warranty and Installation Information:
The Montigo warranty wi be voided by, and Montigo disc aims any
responsibi ity for, the fo owing actions:
Modification of the firep ace and/or components inc uding Direct-Vent
assemb y or g ass doors.
Use of any component part not manufactured or approved by
Montigo in combination with this Montigo firep ace system.
Insta ation other than as instructed in this manua .
Consu t your oca Gas Inspection Branch on insta ation requirements for
factory-bui t gas firep aces. Insta ation & repairs shou d be done by a
qua ified contractor.
InstallationsinCanada must conform to the current CAN/CGAB-
149.1 and .2 Gas Insta ation Code and oca regu ations. If the optiona
air-circu ating fan kit is insta ed, it must be e ectrica y grounded in
accordance with CSAC22.1 Canadian E ectrica Code Part 1 and/or
Loca Codes.
InstallationsintheUSA must conform to oca codes, or in the
absence of oca codes to the Nationa Fue Gas Code, ANSIZ223.1-
1988. If the optiona air-circu ating fan is insta ed, it must be grounded in
accordance with oca codes or, in the absence of oca codes, with the
Nationa E ectrica Code, ANSI/NFPA70-1987.
Table Of Contents
Introduction ............................................................................ 2
Installation
Insta ing the Firep ace She ........................................... 3
Insta ing the Gas ine ....................................................... 4
The Remote Switch ........................................................ 4
Direct Vent Insta ation .................................................... 4
Genera Requirements ....................................... 4
Terminations ...................................................... 4
Top Vent Mode s with horizonta venting ............. 6
Top Vent Mode s with vertica venting ................. 8
Rear Vent Mode s .............................................. 9
Construction around the firep ace
Facing ............................................................. 11
Mante s and Surrounds.................................... 11
Wiring ....................................................................... 11
Removing and Insta ing the Door ................................. 12
Insta ing the Logset ...................................................... 13
Insta ing the Horizonta Trim ......................................... 13
Operation ........................................................................ 14 - 16
Maintenance ................................................................... 16 - 17
Warranty ................................................................................ 18
Appendix
A. Termination Locations .............................................. 19
CAUTIONS
Due to its high operating temperatures, the app iance shou d
be ocated out of traffic & away from furniture and draperies.
Chi dren and adu ts shou d be a erted to the hazards of
the high surface temperature, which cou d cause burns
or c othing ignition.
Young chi dren shou d be carefu y supervised when
they are in the same room as the app iance.
C othing or other f ammab e materia s shou d not be
p aced on or near the app iance.

Page 3
C34-DV Gas Fireplace
Part No. XG0117C
Installing The Fireplace Shell
The firep ace may be insta ed in any ocation that maintains proper
c earance to air conditioning ducts, e ectrica wiring and p umbing.
Safety, as we as efficiency of operation, must be considered when
se ecting the firep ace ocation. Try to se ect a ocation that does not
interfere with room traffic, has adequate venti ation, and offers an
accessib e pathway for Direct Vent insta ation. Refer to page 4 - Vent
Installationfor more information.
The firep ace dimensions are shown be ow:
Installation
When insta ing a she f over the top of the firep ace, the fo owing
guide ines must be adhered to: For Rear Vent mode s (C34-DR), the
minimum c earance from the top of the firep ace to a she f is 7". For Top
Vent mode s (C34-DT), the minimum c earance is 15". (Minimum1"
clearancemuststillbemaintainedaroundtheventpipes.)
Figure 4. Framing for shelves over the fireplace.
Top VentRear Vent
Figure 3. Corner framing dimensions.
Figure 2. Framing dimensions.
* When sheetrock is
not used behind the
firep ace, framing
depth may be
reduced to 13 3/4"
Framing
WARNING:
When this app iance is insta ed direct y on carpeting, ti e
or any combustib e materia other than wood f ooring, it
must be insta ed on a meta or wood pane extending the
fu width and depth of the app iance.
Top Vent
Front View Rear Vent
Clearances
These c earances app y to a dimensions excepttheframedopening,
where the c earance to combustib es is 0". The C34-DVc earances to
combustib e materia s are:
Top-RearVent* 7"
Top-TopVent 15"
Back 0"
Flue 1"
Sides 1"
Floor 0"
Mantle** 6"
* C earance from the top of the firep ace to a combustib e
cei ing within the firep ace enc osure.
** Refer to page 11.
Unprotected combustib e wa s which are perpendicu ar to the firep ace
opening, must not project beyond the shaded area shown in Figure 19b.
For protection against freezing temperatures, it is recommended that
outer wa s of the chase be insu ated with a vapour barrier. This wi
reduce the possibi ity of a co d-air convection current on the firep ace.
Figure 1. Fireplace dimensions.

Page 4
C34-DV Gas Fireplace
Part No. XG0117C
ent Installation
This section covers the insta ation of direct venting and terminations.
Installation Requirements
C34-DV firep aces are certified for use with Montigo Premium Series
(5"/ 8") venting components. The C34-DV TopVent may be used
with Standard Series (4"/7")components on vertica vent runs on y.
Minimum 1" c earance to combustib es required for vent pipes
Use ony certified Montigo vent components. (Use of other parts wi void the
Montigo warranty, and may impede the operation of the firep ace.)
A joints must be secured with a minimum of two screws per joint
Vent terminations must not be recessed in wa s or siding
Horizonta runs must be supported by a minimum of two supports
per horizonta run. A minimum of one screw on each side of
support is a so required
F ex vent sections may be stretched up to 50% of their tota ength
(eg. a 24" section may be stretched to 36")
Maximum horizonta run for a f ex section with no vertica rise is 3 feet.
F ex vent sections over 3 feet must fa within the imits set by the
venting graph and must have a minimum vertica rise of 3 inches
per foot of f ex.
So id vent sections may be cut ess than ha f way from the tapered end
Venting components can be used in any combination of so id/rigid
pipe or f ex pipe and in any orientation (Ma e connectors can face
in any direction)
Vent Terminations
Selecting A Termination Location
Choosing your vent termination ocation wi he p to determine whether
you need to use a top vent or rear vent firep ace. Figure 6, be ow,
shows typica firep ace ocations and the venting options they provide.
For a more detai ed diagram of a owed termination ocations, see
AppendixA.
Cautions:Cautions:
Cautions:Cautions:
Cautions:
Installing The Gas Line
The gas ine must be insta ed before finishing the C34-DV Firep ace.
NaturalGas requires a minimum in et gas supp y pressure of 5.5"
W.C. & a manifo d pressure of 3.5" W.C. PropaneGas requires a
minimum in et gas supp y pressure of 11" W.C. & a manifo d pressure of
10" W.C. Provision must a so be made for a 1/8" N.P.T. p ugged tapping
and be accessib e for test gauge connection immediate y upstream of the
gas supp y contro s to the app iance. The firep ace gas connection and
the main operating gas va ve is ocated behind the removab e brass trim
at the bottom of the unit and need on y be attached to the gas ine with an
approved fitting, as required by the applicable installation codes.
Installation
Figure 6. Fireplace locations and vent terminations.
Note: After gas ine is connected, each appliance connection,
valve and valve train must be checked whi e under
norma operating pressure with either a iquid so ution, or
eak detection device, to ocate any source of eak. Tighten
any areas where bubb ing appears or eak is detected unti
bubb ing stops comp ete y or eak is no onger detected.
DO NOT use a flame of any kind to test for leaks.
Installing The Remote Switch
The C34-DV's gas va ve, ocated behind the ower brass trim, may be
connected to a wa switch. The va ve generates its own power on a
millivoltcircuit. Use only low voltage wire, and DO NOT connect
any externa power to it.
Refer to Figure 27 for wiring requirements.
Note: The switch ocation must not exceed 30' from the firep ace.
Figure 5. Gas line access.
The app iance and its individua shutoff va ve must be disconnected from
the gas supp y piping system during any pressure testing of that system
at test pressures in excess of 1/2 psig (3.5 kPa).
The app iance must be iso ated from the gas supp y piping system by
c osing its individua manua shutoff va ve during any pressure testing of
the gas supp y piping system at test pressures equa to or ess than 1/2
psig (3.5 kPa).
Vent terminations can be very hot. If the termination
is ess than 7 feet above a pub ic wa kway, it shou d
be fitted with a certified Montigo Heat Guard. (Part no.
PTKOG)
Do not obstruct, or attempt to concea , the vent
termination. These actions wi affect the operation
of the firep ace, and may be hazardous.
In heavy snow areas, take extra care to prevent snow
bui dup from obstructing the vent termination.

Page 5
C34-DV Gas Fireplace
Part No. XG0117C
Installing Terminations with Built-In Frames
Installing Terminations with MSR Frames
12
12
1. Frame the termination opening to 12" x 12".
2. Fasten the termination to the studs using a minimum of 4 screws.
11
11
1. Frame the termination opening 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 opening 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 pi ot ho es 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 wi provide more heat protection
at the top of the termination, where temperatures are highest.
2. Attach to the facep ate of the termination using four sheet meta
screws.
Installing Heat Guards over Terminations
Installation

Page 6
C34-DV Gas Fireplace
Part No. XG0117C
Installation
Top ent enting Runs
For the C34-DV TopVent, there are two types of insta ations: A)
Through-The-Wa Insta ations and B) Vertica (Through-The-Roof)
Insta ations.
A) Through-The-Wall Installations
Before you insta any venting, you must determine whether the venting
run wi be acceptab e. Unacceptab e venting can affect the firep ace's
combustion.
The Venting Graph
Measure the vertica height from the firep ace hearth to the centre of the
termination and the horizonta run from the from the firep ace f ue co ar to
the wa f ange of the termination. P ot on the Venting Graph (Fig. 7) with
an 'X'.
If the 'X' fa s on or above the top boundary of the shaded area, the
insta ation is acceptab e.
Example A: (Acceptable Installation)
If the vertica dimension from the hearth is 84" and the horizonta
run to the wa f ange of the vent termination is 36", this wou d be
an acceptab e insta ation.
Example B: (Acceptable Installation)
If the vertica dimension from the hearth is 90" and the horizonta
run to the wa f ange of the vent termination is 120", this wou d be
an acceptab e insta ation.
Example C: (Unacceptable Installation)
If the vertica dimension from the f oor of the firep ace is 72" and
the horizonta run to the wa f ange 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 f ue temperatures, heat shie ds are required on a C34-DV
insta ations (except those with vertica
terminations) at the point where the
venting connects to the termination. With
the heat shie d, vent c earances 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 fo owing venting components are avai ab e for the C34-DV Top
Vent:
A - Termination PTO-3 (3" ength)
PTO-3F (3" ength)
B - Stucco Kits MSR (stucco frame)
MOSR (stucco can)
BSR (brick can)
C - F ex 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 - E bows PEL-90MM (m/m 90° e bow)
PEL-90FF (f/f 90° e bow)
PEL-90FM (f/m 90° e bow)
NOTES: A dimension engths for vertica or horizonta runs are
measured from center of the vent pipe.
Venting runs must fa within the imits set by the venting
graph (see Figure 7).

Page 7
C34-DV Gas Fireplace
Part No. XG0117C
Installation
Termination
Example 1:
For our shortest venting configuration use components 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 e bow used in conjunction with 3 ft. f ex section
(PFL-3) wi , when extended in a five foot chase, a ow for a maximum
horizonta run of twe ve and one-ha f feet from the centre of the firep ace
to outside wa and a minimum of 7'6" when retracted in opposite direction
(see Figure 10 and 11).
"C" f ex sections and "D" rigid sections may be used in conjunction with
one another to obtain different possib e horizonta ength insta ations.
NOTE:F ex section with no vertica rise must not exceed maximum
horizonta ength of 3 feet (seeFigure12). F ex runs over 3 feet must fa
within the imits set by the venting graph, and must have a minimum
vertica rise of 3" per foot of f ex.
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 E bow
RigidSection

Page 8
C34-DV Gas Fireplace
Part No. XG0117C
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"
■Vertica rise >12' can be reduced
■Vertica Terminations must be insta ed:
•minimum 2' (two feet) above the highest point where
vent passes through the roof.
• minimum 6' (six feet) from a mechanica air in et
• minimum 18" (1 1/2 feet) from a parapet wa .
■Maximum vent height is 30 feet above firep ace.
Note: F ame characteristics wi change if the maximum vent height is
used.
■Minimum c earances 1" from vent to a combustib e materia s must be
maintained.
Figure13.a Straight, vertical venting using required adaptor.
■A maximum of two offsets (eachoffsethastwo90°bends) may be
made and sha not exceed tota ength of 25% of the vertica vent height,
when measured center to center of piping.
Examp e: Typica vent insta ation.
20' vertica vent
2 - 2' offsets required
25% of 20' = 5' max. offset a owed
This venting configuration meets requirements.
Figure14a. Vertical venting with 1 offset (1 offset= two 90° bends).
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 vertica y, Vent Restrictors may be added to enhance the
burn characteristics of the firep ace.
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. XG0117C
Installation
2. 45° Corner Installation.
Attach an PEL-45 (45° e bow) direct y onto the f ue co ar. Cut the
PXT-20 to suit, and attach it to the PEL-45. S ide the firep ace into
position and attach to the termination.
Heat Shields
Due to high f ue temperatures, heat shie ds are required on a C34-DV
insta ations (except those with vertica terminations) at the point where
the venting connects to the termination. With the heat shie d, vent
c earances can be maintained at 1". *Heat Shie ds are inc uded
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 supp ied with a 20" extension
pipe (PXT-20) with fema e/fema e connections. For shorter
insta ations, cut the PXT-20 to the desired ength.
For extended insta ations, use the PXT-20 section as supp ied 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"
compressed ength) and a frame, if appropriate.F ex may be turned
to obtain desired degree of ang e 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
Figure14b. Vertical venting with 2 offsets (1 offset= two 90° bends).
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 possib e insta ations which do not
require vertica ift:
Note: For Rear Vent mode s, maximum horizonta run with no
vertica ift must never exceed 20".

Page 10
C34-DV Gas Fireplace
Part No. XG0117C
Installation
B. Multi-Elbow Installations
For more diffiicu t insta ation situations, the C34-DV Rear Vent may be
insta ed with two — 90° e bows and up to 15' of horizonta run. If using
this insta ation option, you must adhere to the fo owing guide ines:
■the first 90° e bow must be p aced direct y on the f ue co ar
■you must have a minimum vertica ift of 50" (measured from the
hearth)
■your vent run must fa within the imits set by Figure 18a
Before you insta any venting, you must determine whether the venting
run wi be acceptab e. Unacceptab e venting can affect the firep ace's
combustion.
The Venting Graph
Measure the vertica height from the firep ace hearth to the centre of the
termination and the horizonta run from the from the firep ace f ue co ar to
the wa f ange of the termination. P ot on the Venting Graph (Fig. 18a)
with an 'X'.
If the 'X' fa s on or above the top boundary of the shaded area, the
insta ation is acceptab e.
Example A: (Acceptable Installation)
If the vertica dimension from the hearth is 84" and the horizonta
run to the wa f ange of the vent termination is 36", this wou d be an
acceptab e insta ation.
Example B: (Acceptable Installation)
If the vertica dimension from the hearth is 90" and the horizonta
run to the wa f ange of the vent termination is 126", this wou d be
an acceptab e insta ation.
Example C: (Unacceptable Installation)
If the vertica dimension from the f oor of the firep ace is 78" and the
horizonta run to the wa f ange 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 supp ied with an PXT-20 (fema e/
fema e) section. In addition, the fo owing venting components are
avai ab e for Rear Vent installations:
A - Termination PTO-3 (3" ength)
PTO-3F (3" ength)
B - Stucco Kits MSR (stucco frame)
BSR-4 (4" brick frame)
BSR-6 (6" brick frame)
MOSR (stucco can)
C - F ex sections PFL-1 (12" section)
PFL-2 (24" section)
PFL-3 (36" section)
PFL-4 (48" section)
D - So id sections PEXT-1 (12" section)
PEXT-2 (24" section)
PEXT-3 (36" section)
PEXT-4 (48" section)
E - 90 degree e bow PEL-90MM (m/m 90° e bow)
PEL-90FF (f/f 90° e bow)
PEL-90FM (f/m 90° e bow)
PEL-45FM (f/m 45° e bow)
Figure 18b. Multi-elbow installation. Distance 'H' must be a
minumum of 50". he vent run must comply with figure
18a.
NOTES: A dimension engths for vertica or horizonta runs are
measured from center of the vent pipe.
Venting runs must fa within the imits set by the venting
graph (see Figure 18a).
8"
H
L
18"