Montigo C38-DV User manual

n Check local codes
and read all
instructions prior to
installation.
n Leave this manual
with the owner.
Gas FireplaceGas Fireplace
Gas FireplaceGas Fireplace
Gas Fireplace
C38-DV
InstallationInstallation
InstallationInstallation
Installation
Operation &Operation &
Operation &Operation &
Operation &
MaintenanceMaintenance
MaintenanceMaintenance
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. Refer 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 2Page 2
Page 2Page 2
Page 2
C38-DV Gas Fireplace
Part No. XG0118B
Introduction
Thank You for choosing a Montigo C-Series Fireplace.
About the C38 Fireplace:
The C38-D includes a 25,000 BTU dual burner with embers and a
ive piece ceramic logset. This model is available in our versions.
n C38DT - Top Vent, Millivolt Pilot
n C38DR - Rear Vent, Millivolt Pilot
n C38DT-S - Top Vent, Pilotless Ignition (STB)
n C38DR-S - Rear Vent, Pilotless Ignition (STB)
The C38-DV is rated or Natural Gas at 25,000 BTU/H (7.33 Kilowatts)
Input or Propane at 25,000 BTU/H (7.33 Kilowatts) Input.
How to use this manual:
This manual covers all models and unless otherwise speci ied, the
designation C38-DV re ers to all models. Sections which are speci ic to
a particular model are marked with a symbol,
plus the appropriate model number.
Warranty and Installation Information:
The Montigo warranty will be voided by, and Montigo disclaims any
responsibility or, the ollowing actions:
nModi ication o the ireplace and/or components including Direct-
Vent assembly or glass doors.
nUse o any component part not manu actured or approved by
Montigo in combination with this Montigo ireplace system.
nInstallation other than as instructed in this manual.
Consult your local Gas Inspection Branch on installation requirements
or actory-built gas ireplaces. Installation & repairs should be done by
a quali ied contractor.
Installations in Canada must con orm to the current CAN/CGA B-
149.1 and .2 Gas Installation Code and local regulations. I the optional
air-circulating an kit is installed, it must be electrically grounded in
accordance with CSA C22.1 Canadian Electrical Code Part 1 and/or
Local Codes.
Installations in the USA must con orm to local codes, or in the
absense o local codes to the National Fuel Gas Code, ANSI Z223.1-
1988. I the optional air-circulating an is installed, it must be grounded
in accordance with local codes or, in the absence o local codes, with
the National Electrical Code, ANSI/NFPA 70-1987.
Table Of Contents
Introduction............................................................................. 2
Installation
Installing the Fireplace Shell ........................................... 3
Installing the Gasline ...................................................... 4
The Remote Switch ....................................................... 4
Direct Vent Installation ................................................... 4
General Requirements ...................................... 4
Terminations ..................................................... 4
Top Vent Models with horizontal venting ............ 6
Top Vent Models with vertical venting ................ 8
Rear Vent Models ............................................. 9
Construction around the ireplace
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 or Pilotless Ignition (STB) Equipped Units .... 20
CAUTIONSCAUTIONS
CAUTIONSCAUTIONS
CAUTIONS
Due to its high operating temperatures, the appliance
should be located out o tra ic & away rom urniture and
draperies.
nChildren and adults should be alerted to the hazards
o the high sur ace temperature, which could cause
burns or clothing ignition.
nYoung children should be care ully supervised when
they are in the same room as the appliance.
nClothing or other lammable materials should not be
placed on or near the appliance.

Page 3Page 3
Page 3Page 3
Page 3
C38-DV Gas Fireplace
Part No. XG0118B
Installing The Fireplace Shell
The ireplace may be installed in any location that is ree o air
conditioning ducts, electrical wiring and plumbing. Sa ety, as well as
e iciency o operation, must be considered when selecting the
ireplace location. Try to select a location that does not inter ere with
room tra ic, has adequate ventilation, and o ers an accessible
pathway or Direct Vent installation. Re er to page 4 - Vent Installation
or more in ormation.
The ireplace dimensions are shown below:
Installation
When installing a shel over the top o the ireplace, the ollowing
guidelines must be adhered to: For Rear Vent models (C38-DR), the
minimum clearance rom the top o the ireplace to a shel is 7 ¼". For
Top Vent models (C38-DT), the minimum clearance is 15". (Minimum
1" clearance must still be maintained around the vent pipes.)
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
ireplace, raming
depth may be
reduced to 16 7/8"
Framing
WARNING:
When this appliance is installed directly on carpeting, tile or any
combustible material other than wood looring, it must be installed
on a metal or wood panel extending the ull width and depth o
the appliance.
Top Vent
Front View Rear Vent
Clearances
These clearances apply to all dimensions except the framed opening,
where the clearance to combustibles is 0". The C38-D clearances to
combustible materials are:
Top - Rear Vent* 7 ¼"
Top - Top Vent 15"
Back 1"
Flue 1"
Sides 0"
Floor 0"
Mantle** 8"
* Clearance rom the top o the ireplace to a combustible
ceiling within the ireplace enclosure.
** Re er to page 10.
Unprotected combustible walls which are perpendicular to the ireplace
opening, must not project beyond the shaded area shown in Figure 20.
For protection against reezing temperatures, it is recommended that
outer walls o the chase be insulated with a vapour barrier. This will
reduce the possibility o a cold-air convection current on the ireplace.
Figure 1. Fireplace dimensions.

Page 4Page 4
Page 4Page 4
Page 4
C38-DV Gas Fireplace
Part No. XG0118B
Vent Installation
This section covers the installation o direct venting and terminations.
Installation Requirements
nC38-DV ireplaces are certi ied or use with Montigo Premium Series
(5" / 8") venting components. The C38-DV Top ent may be used
with Standard Series (4"/7") components on vertical vent runs only.
nMinimum 1" clearance to combustibles required or vent pipes
nUse only certified Montigo vent components. (Use o other
parts will void the Montigo warranty, and may impede the
operation o the ireplace.)
nAll joints must be secured with a minimum o two screws per joint
nVent terminations must not be recessed in walls or siding
nHorizontal runs must be supported by a minimum o two supports
per horizontal run. A minimum o one screw on each side o
support is also required
nFlex vent sections may be stretched up to 50% o their total length
(eg. a 24" section may be stretched to 36")
nMaximum horizontal run or a lex section with no vertical rise is 3 eet.
nFlex vent sections over 3 eet must all within the limits set by the
venting graph and must have a minimum vertical rise o 3 inches
per oot o lex.
nSolid vent sections may be cut less than hal way rom the tapered end
ent Terminations
Selecting A Termination Location
Choosing your vent termination location will help to determine whether
you need to use a top vent or rear vent ireplace. Figure 6, below,
shows typical ireplace locations and the venting options they provide.
For a more detailed diagram o allowed termination locations, see
Appendix B.
Cautions:Cautions:
Cautions:Cautions:
Cautions:
Installing The Gas Line
The gas line must be installed be ore inishing the C38-DV Fireplace.
Natural Gas requires a minimum inlet gas supply pressure o 5.5"
W.C. & a mani old pressure o 3.5" W.C. Propane Gas requires a
minimum inlet gas supply pressure o 11" W.C. & a mani old pressure
o 10" W.C. Provision must also be made or a 1/8" N.P.T. plugged
tapping and be accessible or test gauge connection immediately
upstream o the gas supply controls to the appliance. The ireplace gas
connection and the main operating gas valve is located behind the
removable brass trim at the bottom o the unit and need only be
attached to the gas line with an approved itting, as required by the
applicable installation codes.
Installation
Figure 6. Fireplace locations and vent terminations.
Note: A ter 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 o 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 flame of any kind to test for leaks.
Installing The Remote Switch
The C38-D 's gas valve, located behind the lower brass trim, may be
connected to a wall switch. The valve generates its own power on a
millivolt circuit. Use only low voltage wire, and DO NOT connect
any external power to it.
Re er to Figure 26 or wiring requirements.
Note: The switch location must not exceed 30' rom the ireplace.
Figure 5. as line access.
The appliance and its individual shuto valve must be disconnected
rom the gas supply piping system during any pressure testing o that
system at test pressures in excess o 1/2 psig (3.5 kPa).
The appliance must be isolated rom the gas supply piping system by
closing its individual manual shuto valve during any pressure testing o
the gas supply piping system at test pressures equal to or less than 1/2
psig (3.5 kPa).
nVent terminations can be very hot. I the termination is less than
7 eet above a public walkway, it should be itted with a certi ied
Montigo Heat Guard. (Part no. PTKOG)
nDo not obstruct, or attempt to conceal, the vent termination.
These actions will a ect the operation o the ireplace, and may
be hazardous.
nIn heavy snow areas, take extra care to prevent snow buildup
rom obstructing the vent termination.

Page 5Page 5
Page 5Page 5
Page 5
C38-DV Gas Fireplace
Part No. XG0118B
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 o 4 screws.
11
11
1. Frame the termination opening to 11" x 11".
2. Fasten the termination to the studs using a minimum o 4
screws.
Installing Terminations with MOSR Frames
1212
12
MOSR
1. Frame the termination opening to 12" x 12".
2. Fasten the MOSR rame to the interior side o the studs using a
minimum o 4 screws.
3. Insert the termination into the MOSR rame as shown here, and
attach by screwing through the our pilot holes in the termination.
MSR
PTO-3
PTO-3F
PTO-3
PTKOGPTKOG
PTKOGPTKOG
PTKOG
1. Ensure that the two long mounting brackets are acing the
bottom o the termination. (See inset). This will provide more
heat protection at the top o the termination, where temperatures
are highest.
2. Attach to the aceplate o the termination using our sheet metal
screws.
Installing Heat Guards over Terminations
Installation

Page 6Page 6
Page 6Page 6
Page 6
C38-DV Gas Fireplace
Part No. XG0118B
Installation
Top Vent Venting Runs
For the C38-DV Top ent, there are two types o installations: A)
Through-The-Wall Installations and B) Vertical (Through-The-Roo )
Installations.
A) Through-The-Wall Installations
Be ore you install any venting, you must determine whether the venting
run will be acceptable. Unacceptable venting can a ect the ireplace's
combustion.
The enting Graph
Measure the vertical height rom the ireplace hearth to the centre
o the termination and the horizontal run rom the rom the
ireplace lue collar to the wall lange o the termination. Plot on the
Venting Graph (Fig. 7) with an 'X'.
I the 'X' alls on or above the top boundary o the shaded area,
the installation is acceptable.
Example A: (Acceptable Installation)
I the vertical dimension rom the hearth is 84" and the
horizontal run to the wall lange o the vent termination is 36",
this would be an acceptable installation.
Example B: (Acceptable Installation)
I the vertical dimension rom the hearth is 90" and the
horizontal run to the wall lange o the vent termination is
120", this would be an acceptable installation.
Example C: (Unacceptable Installation)
I the vertical dimension rom the loor o the ireplace is 72"
and the horizontal run to the wall lange o the vent termina-
tion is 84", this would NOT be an acceptable installation.
Figure 7. Venting raph
Figure 8. Heat Shield. Install by sliding over the vent pipe where it
passes through combustible construction.
Heat Shields
Due to high lue temperatures, heat shields are required on all
C38-DV installations (except those with vertical terminations) at
the point 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.)
H arth
0
12
24
36
48
60
72
84
96
108
Available Top ent Components
The ollowing venting components are available or the C38-D
Top ent:
A - Termination PTO-3 (3" length)
PTO-3F (3" length)
B - Stucco Kits MSR (stucco rame)
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/ section)
PEXT-2 (24" m/ section)
PEXT-3 (36" m/ section)
PEXT-4 (48" m/ section)
PEXT-6 (72" m/ section)
E - Elbows PEL-90MM (m/m 90° elbow)
PEL-90FF ( / 90° elbow)
PEL-90FM ( /m 90° elbow)
NOTES: All dimension lengths or vertical or horizontal runs are
measured rom center o the vent pipe.
Venting runs must all within the limits set by the
venting graph (see Figure 7).

Page Page
Page Page
Page
C38-DV Gas Fireplace
Part No. XG0118B
Installation
T rmination
Example 1:Example 1:
Example 1:Example 1:
Example 1:
For our shortest venting con iguration use components A and F (see
Figure 9a).
Figure 9a. Typical Top Vent installation. If the 90° elbow is
installed directly on the fireplace, the height to the
center of the termination is 43½".
Horizontal enting
Figure 9b. Typical Top Vent installation. The solid sections can be
used in various combinations to obtain the desired vent
run. The vent run must fall within the limits set by the
venting graph.
90° Elbow
PEXT S ction
Example 2:
Rigid sections and an elbow used in conjunction with 3 t. lex section
(PFL-3) will, when extended in a ive oot chase, allow or a maximum
horizontal run o twelve and one-hal eet rom the centre o the
ireplace to outside wall and a minimum o 7'6" when retracted in
opposite direction (see Figure 10 and 11).
"C" lex sections and "D" rigid sections may be used in conjunction with
one another to obtain di erent possible horizontal length installations.
NOTE: Flex section with no vertical rise must not exceed maximum
horizontal length o 3 eet (see Figure 12). Flex runs over 3 eet must
all within the limits set by the venting graph, and must have a minimum
vertical rise o 3" per oot o lex.
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.
H arth
T rmination
Ext rior
Wall
3' max.
Fl x S ction
H arth
Fl x S ction T rmination
Ext rior
Wall
126"
30" Max.
Solid S ction w/
90° Elbow
H arth
Fl x S ction
Solid S ctions
T rmination
Ext rior
Wall
150" max.
30" max.
Rigid S ction
PEL-90F/F Elbow Rigid S ction
Figure 12. Horizontal flex installation with no vertical rise.

Page 8Page 8
Page 8Page 8
Page 8
C38-DV Gas Fireplace
Part No. XG0118B
Storm collar
Support ring
MEXT
Solid S ction
Roof flashing
30' max.
* Minimum 1" cl aranc to all combustibl s
Support plat
Fir stop
Fir stop
2' min.
MXT-10
Adaptor
MEXT
Flu
Collar
2' min.
Storm collar
Support ring
Roof flashing
30' max.
* Minimum 1" cl aranc to all combustibl s
Support plat
Fir stop
Installation
B. ertical (Through-The-Roof) Installations
5/8" with option for 4/7"
nVertical rise >12' can be reduced
nVertical Terminations must be installed:
•minimum 2' (two eet) above the highest point where
vent passes through the roo .
•minimum 6' (six eet) rom a mechanical air inlet
•minimum 3' (three eet) rom a parapet wall.
nMaximum vent height is 30 eet above ireplace.
Note: Flame characteristics will change i the maximum vent height
is used.
nMinimum clearances 1" rom vent to all combustible materials must
be maintained.
Figure 13.a Straight, vertical venting using required adaptor.
nA maximum o two o sets with 90° bends may be made and shall not
exceed total length o 25% o the vertical vent height, when measured
center to center o piping.
Example: Typical vent installation.
20' vertical vent
2 - 2' o sets required
25% o 20' = 5' max. o set allowed
This venting con iguration meets requirements.
Figure 14a. Vertical venting with 1 offset.
30' max.
30' max.
Rigid S ction
A
A.Mal /F mal
B.F mal /F mal
C.Mal Flu Collar
B
C
Figure 13b. Reducing Vertical Vent from 5/8" to 4/7".
ent Restrictors
When venting vertically, Vent Restrictors may be added to enhance the
burn characteristics o the ireplace.
Part Size 5"/8" enting 4"/7" enting
- 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 - daptor/ (5"/8" to 4"/7") PV 5487
Vent Reducer

Page 9Page 9
Page 9Page 9
Page 9
C38-DV Gas Fireplace
Part No. XG0118B
Installation
2. 45° Corner Installation.
Attach an PEL-45 (45° elbow) directly onto the lue collar. Cut the
PXT-20 to suit, and attach it to the PEL-45. Slide the ireplace into
position and attach to the termination. Maximum horizontal run
must not exceed 20".
Rear Vent Venting Runs
The C38-D Rear ent has three possible installations which do not
require vertical li t:
Heat Shields
Due to high lue temperatures, heat shields are required on all C38-DV
installations (except those with vertical terminations) at the point 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 rom the hearth to the center o the termination is
28 3/8". C38-DV Rear Vent versions are supplied with a 20"
extension pipe (PXT-20) with emale/ emale connections. For
shorter installations, cut the PXT-20 to the desired length.
For extended installations, use the PXT-20 section as supplied or a
20" vent run.
Note: For Rear Vent models, maximum horizontal run with no
vertical li t must never exceed 20".
Flue Collar
Heat Shield
EXT-18
Termination
Figure 15. Extended installation.
Heat Shield
EXT-18
Termination
EEL-45
Elbow
Flue Collar
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 length) and a rame, i appropriate. Flex may be
turned to obtain desired degree o angle required but must not
exceed 45°.
Figure 17. Flex installation.
Heat Shield
Termination
Flex
Section
Flue Collar
PXT-20
PXT-20
PEL-45
Figure 14b. Vertical venting with 2 offsets.
2' min.
2'
Storm collar
Roof flashing
30' max.
* Minimum 1" cl aranc to all combustibl s
Support straps or
support plat & ring
Fir stop
Fir stop
Fir stop
Support plat
& ring
30' max.

Page 10Page 10
Page 10Page 10
Page 10
C38-DV Gas Fireplace
Part No. XG0118B
Installation
B. Multi-Elbow Installations
For more di iicult installation situations, the C38-DV Rear Vent may
be installed with two — 90° elbows and up to 15' o horizontal run. I
using this installation option, you must adhere to the ollowing
guidelines:
nthe irst 90° elbow must be placed directly on the lue collar
nyou must have a minimum vertical li t o 50" (measured rom
the hearth)
nyour vent run must all within the limits set by Figure 18a
Be ore you install any venting, you must determine whether the
venting run will be acceptable. Unacceptable venting can a ect the
ireplace's combustion.
The enting Graph
Measure the vertical height rom the ireplace hearth to the centre
o the termination and the horizontal run rom the rom the ireplace
lue collar to the wall lange o the termination. Plot on the Venting
Graph (Fig. 18a) with an 'X'.
I the 'X' alls on or above the top boundary o the shaded area, the
installation is acceptable.
Example A: (Acceptable Installation)
I the vertical dimension rom the hearth is 84" and the
horizontal run to the wall lange o the vent termination is 36",
this would be an acceptable installation.
Example B: (Acceptable Installation)
I the vertical dimension rom the hearth is 90" and the
horizontal run to the wall lange o the vent termination is 126",
this would be an acceptable installation.
Example C: (Unacceptable Installation)
I the vertical dimension rom the loor o the ireplace is 78"
and the horizontal run to the wall lange o the vent termination
is 108", this would NOT be an acceptable installation.
Figure 18a. C38-DV Rear Vent Venting raph
0 12 24 36 48 60 72 84 96 108 132120 144 156 168 180
Horizontal Run (in.)
H arth
0
12
24
36
48
60
72
84
96
108
Installation Of Rear Vent DV
C38-DV Rear Vent versions are supplied with an PXT-20 ( emale/
emale) section. In addition, the ollowing venting components are
available or Rear ent installations:
A - Termination PTO-3 (3" length)
PTO-3F (3" length)
B - Stucco Kits MSR (stucco rame)
BSR-4 (4" brick rame)
BSR-6 (6" brick rame)
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 ( / 90° elbow)
PEL-90FM ( /m 90° elbow)
PEL-45FM ( /m 45° elbow)
Figure 18b. Multi-elbow installation. Distance 'H' must be a
minumum of 50". The vent run must comply with figure
18a.
NOTES: All dimension lengths or vertical or horizontal runs
are measured rom center o the vent pipe.
Venting runs must all within the limits set by the
venting graph (see Figure 18a).
8"
H
L
18"