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.
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.
A. Termination Locations ............................................. 19
Introduction
Thank You for choosing a Montigo C-Series Fireplace.
About the C42 Fireplace:
The includes a 27,000 BTU dual burner with embers and a five piece
ceramic logset. This model is available in four versions.
C42DT - Top Vent, Millivolt Pilot
C42DR - Rear Vent, Millivolt Pilot
C42DT-I - Top Vent, Intermittent Pilot (HSI)
C42DR-I - Rear Vent, Intermittent Pilot (HSI)
The C42-DV is rated for Natural Gas at 27,000 BTU/H (7.33 Kilowatts)
Input or Propane at 27,000 BTU/H (7.33 Kilowatts) Input.
How to use this manual:
This manual covers all models and unless otherwise specified, the
designation C42-DV refers to all models. Sections which are
specific 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 for, the following actions:
n Modification of the fireplace and/or components including
Direct-Vent assembly or glass doors.
n Use of any component part not manufactured or approved by
Montigo in combination with this Montigo fireplace system.
n Installation other than as instructed in this manual.
Consult your local Gas Inspection Branch on installation requirements
for factory-built gas fireplaces. Installation & repairs should be done by
a qualified contractor.
Installations in Canada must conform to the current CAN/CGA B-
149.1 and .2 Gas Installation Code and local regulations. If the optional
air-circulating fan 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 conform to local codes, or in the
absense of local codes to the National Fuel Gas Code, ANSI Z223.1-
1988. If the optional 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/NFPA 70-1987.
CAUTIONS
Due to its high operating temperatures, the appliance
should be located out of traffic & away from furniture and
draperies.
n Children and adults should be alerted to the hazards
of the high surface temperature, which could cause
burns or clothing ignition.
n Young children should be carefully supervised when
they are in the same room as the appliance.
n Clothing or other flammable materials should not be
placed on or near the appliance.
Page 2
Part No. XG0119C
®
Installation
Installing The Fireplace Shell
C42-DV Gas Fireplace
The fireplace may be installed in any location that maintains proper
clearance to air conditioning ducts, electrical wiring and plumbing.
Safety, as well as efficiency of operation, must be considered when
selecting the fireplace location. Try to select a location that does not
interfere with room traffic, has adequate ventilation, and offers an
accessible pathway for Direct Vent installation. Refer to page 4 - VentInstallation for more information.
The fireplace dimensions are shown below:
Top Vent
16 ¾
38 ¾
Framing
* When sheetrock is
not used behind the
fireplace, framing
depth may be
reduced to 17 1/4"
Figure 2. Framing dimensions.
8
5
32 ½
Front View
Rear Vent
Figure 1.Fireplace dimensions.
Clearances
These clearances apply to all dimensions except the framed opening,
where the clearance to combustibles is 0". The C42-DV clearances to
combustible materials are:
Top - Rear Vent*8"
Top - Top Vent15"
Back1/2"
Flue1"
Side1"
Floor0"
Mantle**8"
* Clearance from the top of the fireplace to a combustible
ceiling within the fireplace enclosure.
** Refer to page 11.
Unprotected combustible walls which are perpendicular to the
fireplace opening, must not project beyond the shaded area shown in
Figure 19b.
For protection against freezing temperatures, it is recommended that
outer walls of the chase be insulated with a vapour barrier. This will
reduce the possibility of a cold-air convection current on the fireplace.
Figure 3. Corner framing dimensions.
When installing a shelf over the top of the fireplace, the following
guidelines must be adhered to: For Rear Vent models (C42-DR),
the minimum clearance from the top of the fireplace to a shelf is 8". For
Top Vent models (C42-DT), the minimum clearance is 15". (Minimum1" clearance must still be maintained around the vent pipes.)
Head er
Head er
Shelf
8” Min.
Shelf
15" .
Min
4742 ¾42 ¾
32 ½
Top VentRear Vent
Figure 4. Framing for shelves over the fireplace.
WARNING:
When this appliance is installed directly on carpeting, tile or any
combustible material other than wood flooring, it must be installed
on a metal or wood panel extending the full width and depth of
the appliance.
Part No. XG0119C
Page 3
C42-DV Gas Fireplace
®
Installation
Installing The Gas Line
The gas line must be installed before finishing the C42-DV Fireplace.
Natural Gas requires a minimum inlet gas supply pressure of 5.5"
W.C. & a manifold pressure of 3.5" W.C. Propane Gas requires a
minimum inlet gas supply pressure of 11" W.C. & a manifold pressure
of 10" W.C. Provision must also be made for a 1/8" N.P.T. plugged
tapping and be accessible for test gauge connection immediately
upstream of the gas supply controls to the appliance. The fireplace gas
connection and the main operating 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 approved fitting, as required by the
applicable installation codes.
Figure 5. Gas line access.
The appliance and its individual shutoff valve must be disconnected
from the gas supply piping system during any pressure testing of that
system at test pressures in excess of 1/2 psig (3.5 kPa).
The appliance must be isolated from the gas supply piping system by
closing its individual manual shutoff valve during any pressure testing of
the gas supply piping system at test pressures equal to or less than 1/2
psig (3.5 kPa).
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 flame of any kind to test for leaks.
Vent Installation
This section covers the installation of direct venting and terminations.
Installation Requirements
n C42-DV fireplaces are certified for use with Montigo Premium Series
(5" / 8") venting components. The C42-DV Top Vent may be used
with Standard Series (4"/7") components on vertical vent runs only.
n Minimum 1" clearance to combustibles required for vent pipes
n Use only certified Montigo vent components. (Use of other
parts will void the Montigo warranty, and may impede the
operation of the fireplace.)
n All joints must be secured with a minimum of two screws per joint
n Vent terminations must not be recessed in walls or siding
n Horizontal runs must be supported by a minimum of two supports
per horizontal run. A minimum of one screw on each side of
support is also required
n Flex vent sections may be stretched up to 50% of their total length
(eg. a 24" section may be stretched to 36")
n Maximum horizontal run for a flex section with no vertical rise is 3 feet.
n Flex vent sections over 3 feet must fall within the limits set by the
venting graph and must have a minimum vertical rise of 3 inches
per foot of flex.
n Solid vent sections may be cut less than half way from the tapered end
n Venting components can be used in any combination of solid/rigid
pipe or flex pipe and in any orientation (Male connectors can face
in any direction)
Vent 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 fireplace. Figure 6, below,
shows typical fireplace locations and the venting options they provide.
For a more detailed diagram of allowed termination locations, see
Appendix A.
Installing The Remote Switch
The C42-DV's gas valve, located behind the lower brass trim, may be
connected to a wall switch. The valve generates its own power on amillivolt circuit. Use only low voltage wire, and DO NOT connect
any external power to it.
Refer to Figure 27 for wiring requirements.
Note: The switch location must not exceed 30' from the fireplace.
Page 4
Figure 6. Fireplace locations and vent terminations.
Cautions:Cautions:
Cautions:
Cautions:Cautions:
n Vent terminations can be very hot. If the termination is less than
7 feet above a public walkway, it should be fitted with a certified
Montigo Heat Guard. (Part no. PTKOG)
n Do not obstruct, or attempt to conceal, the vent termination.
These actions will affect the operation of the fireplace, and may
be hazardous.
n In heavy snow areas, take extra care to prevent snow buildup
from obstructing the vent termination.
Part No. XG0119C
®
C42-DV Gas Fireplace
Installation
Installing Terminations with Built-In Frames
11
PTO-3F
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 MSR Frames
12
MSR
Installing Heat Guards over Terminations
PTKOG
1.Ensure that the two long mounting brackets are facing the
bottom of the termination. (See inset). This will provide more
heat protection at the top of the termination, where temperatures
are highest.
2.Attach to the faceplate of the termination using four sheet metal
screws.
12
PTO-3
1. Frame the termination opening to 12" x 12".
2. Fasten the termination to the studs using a minimum of 4 screws.
Installing Terminations with MOSR Frames
MOSR
PTO-3
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 pilot holes in the termination.
1212
12
Part No. XG0119C
Page 5
C42-DV Gas Fireplace
®
Installation
Top Vent Venting Runs
For the C42-DV Top Vent, there are two types 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 acceptable. Unacceptable venting can affect the fireplace's
combustion.
The Venting Graph
Measure the vertical height from the fireplace hearth to the centre
of the termination and the horizontal run from the from the
fireplace flue collar to the wall flange of the termination. Plot on the
Venting Graph (Fig. 7) with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area,
the installation is acceptable.
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 acceptable 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 acceptable installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace is 72"
and the horizontal run to the wall flange of the vent termination is 84", this would NOT be an acceptable installation.
108
96
84
72
60
48
36
24
12
0
12 24 36 48 60 72 84 96 108132120144 156 168 180
0
Hearth
Figure 7. Venting Graph
Horizontal Run (in.)
Heat Shields
Due to high flue temperatures, heat shield are required on all C42-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".
Figure 8.Heat Shield. Install by sliding over the vent pipe
where it passes through combustible construction.
Available Top Vent Components
The following venting components are available for the C42-DV
Top Vent: