Montigo M40DV-ST User manual

nCheck local codes and
read all instructions
prior to installation.
nLeavethismanualwith
the owner.
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.
See-Thru
Gas Fireplace
M40DV-ST
M40DV-ST (MH)
Questions? Email us at [email protected] or visit our website at www.montigo.com.

P/NXG0207
Page 2
M40DV-ST See-Thru Gas Fireplace
Introduction
The M40DV-ST is a direct-vented, 2-sided Gas Fireplace with an
adjustable burner. It can be converted to both a top vent or side vent
unit, and it is available in two models:
nModel M40DV-ST (continuous pilot
nModel M40DV-ST-I (intermittent pilot
nModel M40DV-ST-MH (mobile home
For Mobile Home Approved Models See Appendix B
This manual covers both models and unless otherwise specified, the
designation M40DV-ST refers to both models. Sections which are
specific to a particular model are marked with a symbol,
plus the appropriate model number.
The M40DV-ST is rated for:
nNatural Gas at 30,000 BTU/H (8.79 Kilowatts max. input,
and 24,000 BTU/H (7.03 Kilowatts min. input.
nPropane at 30,000 BTU/H (8.79 Kilowatts max. input, and
24,000 BTU/H (7.03 Kilowatts min. input.
The Montigo warranty will be voided by, and Montigo disclaims any
responsibility for, the following actions:
nModification of the fireplace and/or components including Direct-
Vent assembly or glass doors.
nUse of any component part not manufactured or approved by
Montigo in combination with this Montigo fireplace system.
nInstallation 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. This
fireplace's fans must be electrically grounded in accordance with CSA
C22.1 Canadian Electrical Code Part 1 and/or Local Codes.
Installations in the SA must conform to local codes, or in the
absense of local codes to the National Fuel Gas Code, ANSI Z223.1-
1988. The fans must be grounded in accordance with local codes or, in
the absence of local codes, with the National Electrical Code, ANSI/
NFPA 70-1987.
CA TIONS
Due to its high operating temperatures, the appliance
should be located out of traffic & 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 flammable materials should not be
placed on or near the appliance.
Table Of Contents
Introduction............................................................................. 2
Installation ........................................................................3 - 14
Installing the Fireplace Shell........................................... 3
Installing the Gasline ...................................................... 4
The Remote Switch ....................................................... 4
Direct Vent Installation ................................................... 4
Terminations ..................................................... 5
Converting to Top Vent or Side Vent model
(Installing the Flue cover .................................. 6
Rear Vent Venting Requirements ...................... 6
Rear Vent Horizontal Venting Runs ................... 7
Rear Vent Vertical Venting Runs ....................... 8
Top Vent Venting Requirements........................ 9
Top Vent Horizontal Venting Runs................... 10
Top Vent Vertical Venting Runs ....................... 11
Reduced Vertical Venting ................................ 12
Construction around the fireplace
Facing ........................................................... 12
Mantels and Surrounds ................................... 12
Wiring ........................................................... 13
Removing and Installing the Door ................................ 13
Installing the Logset ..................................................... 14
Installing the Ember Material ........................................ 14
Operation ..........................................................................14-16
Model M40DV-ST ........................................................ 15
Model M40DV-ST-I ..................................................... 16
Maintenance .....................................................................17-18
Warranty ................................................................................. 19
Appendix
A. Termination Locations ............................................. 20
B. Mobile Home Approved Models ............................... 21

Page 3
P/NXG0207
M40DV-ST See-Thru Gas Fireplace
Installation
Installing The Fireplace Shell
The fireplace may be installed in any location that maintains clearances
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.
The fireplace dimensions are shown below:
Figure 1. Fireplace dimensions.
Framing
Unprotected combustible walls which are perpendicular to the fireplace
opening, must not project beyond the shaded area shown in Figure 20b.
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.
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.
Figure 2a. Framing dimensions for the rough opening.
Clearances
The M40DV-ST clearances to combustible materials are:
Top* 8"
Ends 1½"
Floor Combustible
Mantle** 6"
FlueCover 1 1/2"
* Clearance from the top of the fireplace to
a combustible ceiling within the fireplace
enclosure.
** Refer to page12.
Figure 2b. Back-framing to finish enclosing the fireplace can be
constructed on either the left or right side.
End View Top View
Front View
Figure 2c. Flue Cover clearances to combustibles when installing the
unit in a top vent configuration.

P/NXG0207
Page 4
M40DV-ST See-Thru Gas Fireplace
Installing The Gas Line
The gas line must be installed before finishing the M40DV-ST 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 are located behind the removable
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.
* 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.
Installing The Remote Switch
The M40DV-ST is equipped with a remote-operated valve for use with
a wall switch. See Figure 19 for information on wiring the switch. The
valve is pre-wired and generates its own power. DO NOT connect any
external power to it.
Note: The switch location must not exceed 30' from the fireplace.
Figure 3. 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 .
Installation
Vent Installation
This section covers the installation of direct venting and terminations. For a
detailed diagram of allowed termination locations, see Appendix A.
Installation Requirements
nThe M40DV-ST fireplace uses Premium venting components with:
5" inner dia. /8" outer dia.
nMinimum clearance to combustible construction around the
vent pipe is 1" on all sides, except on horizontal venting where the
top of the pipe must have a clearance of at least 2".
nUse only certified Montigo vent components. (Use of other parts will
void the Montigo warranty, and may impede the operation of the
fireplace.
nAll joints must be secured with a minimum of two screws per joint
nVent terminations must not be recessed in walls or siding
nHorizontal 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
nFlex vent sections may be stretched up to 50% of their total length
(eg. a 24" section may be stretched to 36"
nMaximum horizontal run for a flex section with no vertical rise is 3 feet.
nFlex 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.
nVenting components can be used in any combination of solid/rigid
nSolid vent sections may be cut less than half way from the tapered end
nVenting 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
nVent 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
nDo not obstruct, or attempt to conceal, the vent termination.
These actions will affect the operation of the fireplace, and may
be hazardous.
nIn heavy snow areas, take extra care to prevent snow buildup
from obstructing the vent termination.
CA TIONS:

Page 5
P/NXG0207
M40DV-ST See-Thru Gas Fireplace
Installation
Installing Heat Guards over Terminations
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.
Installing Terminations with MSR Frames
1. Frame the termination opening to 12" x 12".
2. Fasten the termination to the studs using a minimum of 4 screws.
12
12
MSR
Figure 4b. Installing a P 0-3 termination with the MSR frame.
Figure 4c. Installing a P 0-3 termination with the MOSR frame.
1212
12
MOSR
Installing Terminations with MOSR Frames
1. Frame the termination opening to 12" x 12".
2. Fasten the MSR frame to the interior side of the studs using a
minimum of 4 screws.
3. Insert the termination into the MSR frame as shown here, and
attach by screwing through the four pilot holes in the termination.
PTKOG
Figure 4d. Installing the heat guard.
PTO-3
PTO-3
Installing Terminations with Built-In Frames
Vent Terminations
1. Frame the termination opening to 11" x 11".
2. Fasten the termination to the studs using a minimum of 4 screws.
PTO-3F
11
11
Figure 4a. Installing a P 0-3F termination.

P/NXG0207
Page 6
M40DV-ST See-Thru Gas Fireplace
Rear Vent
Venting Requirements
If your installation requires more than 12" of horizontal venting, some
vertical lift is required. Use the vent graph below to determine an
acceptable vent run. Unacceptable venting can affect the fireplace's
performance.
nthe maximum horizontal vent run is 16 feet
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. 6 with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
Figure 6. Venting Graph.
ExampleA:(AcceptableInstallation)
If the vertical dimension from the hearth is 82", and the horizontal
run to the wall flange of the vent termination is 156", this would be
an acceptable installation.
ExampleB:(AcceptableInstallation)
If the vertical dimension from the hearth is 72" and the horizontal
run to the wall flange of the vent termination is 36", this would be
an acceptable installation.
ExampleC:(UnacceptableInstallation)
If the vertical dimension from the floor of the fireplace is 48" and
the horizontal run to the wall flange of the vent termination is 108",
this would NOT be an acceptable installation.
Center of vent 29½"
Converting to Top Vent/ Side Vent
(Installing the Flue Cover)
Side Vent
An M40DV-ST is shipped ready for a rear vent installation.
1. The outer flue cover must be secured in place with a minimum of
2 screws as shown below.
Top Vent
The flue cover may be converted for a top vent installation.
1. Remove the inner and outer flue covers from the top vent flue collar.
2. Install both the inner and outer flue covers on the rear vent flue
collar as shown in figure 5a.
3. The outer flue cover must be secured in place with a minimum of
2 screws as shown below.
Figure 5a. Installing the flue cover.
Figure 5b. Flue cover installation
for side vented fireplace.
Figure 5c. Flue cover installation
for top vented fireplace.
Installation

Page 7
P/NXG0207
M40DV-ST See-Thru Gas Fireplace
Short Configurations:
For installations straight through the wall, use an PTO-3/-3F
termination and PXT-5 or PXT-10 to achieve the desired length.
The maximum horizontal vent run with no vertical lift is 12". See
Figure 7.
Example:
A 10' section of rigid pipe and a 90° elbow may be used in conjunction
with a 3 ft. flex section (PFL-3 will, when extended in a chase, allow for
a maximum horizontal run of twelve and one-half feet from the centre
of the fireplace to outside wall and a minimum of 7'6" when retracted in
opposite direction. (See Figure 9.)
"D" flex sections and "E" solid sections may be used in conjunction with
one another to obtain different possible horizontal length installations.
NOTE: Flex section must not exceed maximum horizontal length of 3
feet, and for this application the top clearance is to the ceiling.
Long Vent Runs:
For longer or more complex vent runs, vertical lift is required. First
ensure that the planned run is acceptable using the Vent Graph. Plan
out the required components using the chart above. You may be able
to use fewer components using the chart below.
Figure 7. Short horizontal installation.
Figure 9. Extended horizontal installation using a combination of rigid
and flex venting.
Figure 8. Heat Shield for short horizontal installation. Install by sliding
over the vent pipe where it connects to the termination.
Heat Shields
Due to high flue temperatures, the heat shield (RHS101 must be used
on all installations straight through the wall, at the point where
the vent pipe connects to the termination. With the heat shield, vent
clearances can be maintained at 1". The heat shield is not included with
the fireplace.
To install the heat shield, slide one section over the vent pipe on the
inside of the wall opening, with the circular portion inside the wall cavity.
Screw the shield in place over the wall opening. Install the second
section on the outside of the wall opening sliding the circular portion into
the wall opening. Refer to Figure 8.
Horizontal Vent Installation
Vent systems that terminate through a wall may comprise up to seven
different components:
A - Termination PTO-3
PTO-3F
B - Stucco Kits MSR (stucco frame)
MOSR (stucco can)
D - Flex sections PFL-1(12"section)
PFL-2(24"section)
PFL-3(36"section)
PFL-4(48"section)
E - Rigid sections PEXT-1(12" section)
PEXT-2(24" section)
PEXT-3(36" section)
PEXT-4(48" section)
F - Extensions PXT- 5 (5" section)
PXT-10(10"section)
G - 90° elbow PEL-90F/F
PEL-90M/M
H - Heat Shield RHS101 ( for 5"/8" venting)
InstallationInstallation
InstallationInstallation
Installation Rear Vent

P/NXG0207
Page 8
M40DV-ST See-Thru Gas Fireplace
Vertical Vent Installations
nVertical Installations with a rise greater than 12' can be reduced from
5/8 to 4/7 venting.
•minimum 2' (two feet above the highest point where
vent passes through the roof.
•minimum 6' (six feet from a mechanical air inlet
•minimum 18" (1 1/2 feet from a parapet wall.
nMaximum vent height is 30 feet above fireplace.
Note: Flame characteristics will change if the maximum vent height
is used.
nMinimum clearance to combustible construction around the
vent pipe is 1" on all sides must be maintained, except on
horizontal venting where the top of the pipe must have a
clearance of at least 2".
2. Offset Vertical Installations
nA maximum oftwo offsets (each offset has two 90° bends) may be
made if the length of the offsets does not exceed 25% of the vertical vent
height, when measured center to center of piping.
Example: Typical vent installation.
30' vertical vent
2 - 2' offsets required
25% of 30' = 7-1/2' max. offset allowed
This venting configuration meets requirements.
Figure 11b. Vertical venting with 2 offsets (1 offset= two 90° bends .
* If reducing to 4"/7" venting see figure 19.
Figure 11a. Vertical venting with 1 offset (1 offset= two 90° bends .
* If reducing to 4"/7" venting see figure 19.
1. Straight Vertical Installation
Figure 10. Straight, vertical venting. When the vent run is not reduced
use a PEL-90F/F elbow, which is connected directly to the
fireplace flue collar. In this case, the PX -10 adaptor is not
needed. * If reducing to 4"/7" venting see figure 19.
Installation Rear Vent

Page 9
P/NXG0207
M40DV-ST See-Thru Gas Fireplace
Top Vent Venting Requirements
Before you install any venting, you must determine whether the venting
run will be acceptable. Unacceptable venting can affect the fireplace's
combustion.
nfor installations with horizontal venting runs of 0-16 feet, use the
vent graph, as described below
nthe maximum horizontal vent run is 16 feet.
The Rear Vent 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. 12 with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
ExampleA:(AcceptableInstallation)
If the vertical dimension from the hearth is 72", and the horizontal
run to the wall flange of the vent termination is 120", this would be
an acceptable installation.
ExampleB:(AcceptableInstallation)
If the vertical dimension from the hearth is 66" and the horizontal
run to the wall flange of the vent termination is 30", this would be
an acceptable installation.
ExampleC:(UnacceptableInstallation)
If the vertical dimension from the floor of the fireplace is 48" and
the horizontal run to the wall flange of the vent termination is 84",
this would NOT be an acceptable installation.
Installation Of Top Vent DV
A complete M40DV-ST vent system may comprise up to five different
types of components:
A - Termination PTO-3 (3" length)
PTO-3F(3"length)
B - Stucco Kits MSR (stucco 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 - Elbows PEL-90MM (m/m 90° elbow)
PEL-90FF (f/f 90° elbow)
PEL-90FM (f/m 90° elbow)
Installation Top Vent
Figure 12. Rear Vent Venting Graph.
Height to center
of vent pipe.
Hearth
Vent Rise (feet
Vent Run (feet

P/NXG0207
Page 10
M40DV-ST See-Thru Gas Fireplace
Installation
Figure 14b. Retracted Installation.
Figure 14a. Extended installation.
Figure 13. Short Horizontal Installation.
Example:
A 10' section 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
fireplace to outside wall and a minimum of 7'6" when retracted in
opposite direction. (See Figure 14a and 14b.)
"D" flex sections and "E" solid sections may be used in conjunction with
one another to obtain different possible horizontal length installations.
NOTE: Flex section must not exceed maximum horizontal length of 3
feet. (See Figure 15.)
Top Vent
Figure 15. Horizontal flex installation.

Page 11
P/NXG0207
M40DV-ST See-Thru Gas Fireplace
InstallationInstallation
InstallationInstallation
Installation
Installation Of Vertical Vent DV
nVertical Terminations must be installed:
•minimum 2' (two feet above the highest point where
vent passes through the roof.
•minimum 6' (six feet from a mechanical air inlet
•minimum 18" (1 1/2 feet from a parapet wall.
nMaximum vent height is 30 feet above fireplace.
Note: Flame characteristics will change if the maximum vent height
is used.
nMinimum clearance to combustible construction around the
vent pipe is 1" on all sides must be maintained, except on
horizontal venting where the top of the pipe must have a
clearance of at least 2".
nA maximum of two offsets (each offset has two 90° bends) may be
made if the length of the offsets does not exceed 25% of the vertical vent
height, when measured center to center of piping.
Example: Typical vent installation.
30' vertical vent
2 - 2' offsets required
25% of 30' = 7-1/2' max. offset allowed
This venting configuration meets requirements.
A - Termination PVTK-1
B - Flex sections PFL-1 (12" section)
PFL-2 (24" section)
PFL-3 (36" section)
PFL-4 (48" section)
C - Solid sections PEXT-1 (12" section)
PEXT-2 (24" section)
PEXT-3 (36" section)
PEXT-4 (48" section)
D - Support Ring & Plate PSPXT-7 (8" dia.)
E - Firestop PS-8 (8" dia.)
F - Roof Flashing PRF-7 (1/12 - 7/12 pitch)
PRF-12 (7/12 - 12/12 pt.)
Figure 18. Vertical venting using 2 offsets (1 offset= two 90° bends .
* If reducing to 4"/7" venting see figure 19.
Figure 17. Vertical venting using 1 offset (1 offset= two 90° bends .
* If reducing to 4"/7" venting see figure 19.
Figure 16. Straight, vertical venting.
* If reducing to 4"/7" venting see figure 19.
Top Vent

P/NXG0207
Page 12
M40DV-ST See-Thru Gas Fireplace
Finishing Around the Fireplace
Combustible mantels and mouldings may be safely installed over the top
and on the front of the fireplace provided that they do not project
beyond shaded area shown in Figure 20a. Side wall clearances are 0".
Combustible surrounds may be installed with 0" clearance to the side of
the fireplace as shown in Figure 20b.
Fireplace Facing
When selecting the finish material for your fireplace, it is important to
remember the following: LO VRE TRIMS AND FIREPLACE FRAME
M ST NOT BE OBSTR CTED IN ANY WAY - to do so restricts
the air supply for the control compartments and heat exchanger
it also prevents access for servicing controls.
The face of the fireplace may be painted to match the room decor,
provided you use a heat-resistant paint. Decorative facing must not
extend past the fireplace opening at all, because it will interfere with the
access to retainers for removal of glass door. When using a tile
facing It is required not to tile over the outside frame of the
fireplace as this will obstruct the door removal. See Figure 20c.
Installation
Mantels & Surrounds
NOTE: Mantel clearances are for fire hazard prevention to
combustible materials.
New technology, to meet consumer and government demands for
the wise use of energy, has prompted us to manufacture many
models of fireplaces which are hot, fuel and energy efficient.
Please be aware; temperatures over the mantel will rise above
normal room temperature and walls above fireplace may be hot to
touch.
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.
Figure 20a. Combustible mantles and facings.
Figure 20b. Combustible surrounds. op view.
Painting:
Special care is recommended by the Master Painters and Decora-
tors Association, when painting the fireplace surrounds, to select
and apply a quality Alkyd sealer prior to the applying of latex
paints. This is to prevent leaching of water from evaporation and
causing a brownish staining effect to paint over coats.
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
Figure 19. Reduced Vertical venting application from 5"/8" to 4"/7".
Reduced Vertical Installation
It is possible to reduce vertical vent runs from 5"/8" venting to 4"/7"
venting. Reduced vertical venting may only be used when the
installation exceeds 12 feet and terminates through the roof, and if
the vertical vent reducer is used with the following venting
configuration.

Page 13
P/NXG0207
M40DV-ST See-Thru Gas Fireplace
Installation
Removing and Installing the
Glass Doors
Removing the Louvres
Remove the louvre assemblies (upper and lower from one side of the
fireplace. Grasp the assembly underneath one of the louvres and up
slightly and pull outwards, as shown in figure 22a.
Remove the side panel by sliding it out and away from the back of the
fireplace. Refer to figure 22b.
Figure 22a. Removing the louvre
assemblies.
Figure 22b. Removing the side panel. Figure 22c. Removing the door.
Wiring
Gas Control and Pilot Wiring
Honeywell (Q3450)
Pilot Assembly
Pilot Electrical
Harness Connector
Honeywell Gas
Control (SV9501M)
Gas Control
Connector Fuse
Limit
Switch Wall
Switch
Fan Plug
Receptacle
Junction Box
Junction Box Cover
White
Black
Green
40 VA
Transformer
115VAC
24VAC
Grnd Screw
Figure 21. Wiring for the M40DV-S -I with Honeywell gas control and pilot.
M40DV-ST-I
Removing the Doors
To remove the inner doors, simply unscrew the eight (8 machine screws
on the top and bottom of the door. (See figure 22c).
Door Installation
To re-install the doors, align the door with the screw holes and re-fasten
with all eight machine screws. Ensure that a good seal is maintained.
Re-install the side panels and louvre assemblies by reversing the above
steps.
Figure 20c. When using a tile surround, do not tile over the outside frame.

P/NXG0207
Page 14
M40DV-ST See-Thru Gas Fireplace
Installation Operation
Lighting Instructions
See Pages 15-16.
Burner Adjustment
The M40DV-ST is equipped with an adjustable burner, allowing you to
raise or lower the flames. To adjust the flames, locate the black knob
marked 'Hi-Lo', in the centre of the gas control valve (See Figure 24 .
The front burners are not adjustable.
nTo raise the flame height, turn the black knob (located behind the
lower trim counterclockwise.
nTo lower the flame height, turn clockwise.
Figure 24. 'Hi-Lo' Adjustment on the M40DV-S 's gas valve.
Figure 23b. Completed Installation.
Figure 23a. Log Installation.
Log 'A'
Log 'B'
Log 'C'
Log 'D'
Log 'E'
Ember material
Ember
material
Installing the Logs and Embers
Bottom Logs
The M40DV-ST is supplied with five (5 fibre logs. The two large
bottom logs (logs "A" and "B") are mounted on the burner grate by
placing them into the slots.
Top Logs
Place logs "C" and "D" into their mating positions on the large logs
as shown in Figure 23a below. Log "E" is mounted on top of logs "C"
and "D" as shown in Figure 23b.
WARNING:WARNING:
WARNING:WARNING:
WARNING: If logs are not placed properly, excessive
sooting will result.
Installing the Ember Material
The ember material is supplied in two packages. Place the material
evenly along both ember burner tubes, next to logs 'A' and 'B'. Refer to
figure 23b. Ensure that the burner carries over properly after placing
the embers.
Note: M40DV-S -I (electronic ignition) or M40DV-S -MH
(mobile home) models do not feature hi/lo adjustment.
For electronic ignition (HSI) models see figure 21, for
mobile home approved models see Appendix B.

Page 15
P/NXG0207
M40DV-ST See-Thru Gas Fireplace
For Your Safety - READ BEFORE LIGHTING:
WARNING: If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.
nIf you cannot reach your gas supplier, call the Fire
Department.
C. Use only your hand to push in or turn the gas control
knob. Never use tools. If the knob will not push in or
turn by hand, don't try to repair it, call a qualified
service technician. Force or attempt to repair may
result in a fire or explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician
to inspect the appliance and to replace any part of the
control system, and any gas control which has been
under water.
A. This appliance has a pilot which must be lighted by
hand. When lighting the pilot, follow these instructions
exactly.
B. BEFORE LIGHTING smell all around the appliance
area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle
on the floor.
What To Do If You Smell Gas:
nDo not try to light any appliance.
nDo not touch any electrical switch; do not use any
phone in your building.
nImmediately call your gas supplier from a
neighbour's phone. Follow the gas supplier's
instructions.
To Turn Off Gas To Appliance:
Operation - Model M40DV-ST
3. Push in gas control knob slightly and turn
clockwise to "Off". Do not force.
4. Flipupthelowerendlouvres.
1. Turnoffremoteswitch.
2. Flipdownthelowerendlouvres.
1. STOP! Readthesafetyinformation above on this
label.
2. Flip down the lower louvres on the end panel of the
fireplace.
3. Push in gas control knob and turn clockwise to
"OFF."
4. Wait five (5) minutes to clear out any gas. Smell for
gas, including near the floor. If you then smell gas,
STOP! Follow"B"inthe safety information above on
this label. If you don't smell gas, go to the next step.
5. Locate pilot burner (Seeillustrationatright.)andfollow
stepsbelow.
6. Turn knob on gas control counterclockwise to
"PILOT."
7. Push in gas control knob completely and hold. Light
with Piezo Igniter button. Continue to hold the control
knob in for about (1) minute after the pilot is lit. Release
the knob and it will pop back up. Pilot should remain lit.
If it goes out repeat steps 3 through 8.
nIfknobdoesnotpopupwhen
released.Stopandimmediately
call your service technician or gas
supplier.
nIf the pilot will not stay lit after
severaltries, turn the gascontrol
knob to "OFF" and call your service technician or
gassupplier.
8. Push in gas control knob and turn counterclockwise
to "ON."
9. Flipupthelowerlouvres.
10.Turnonremoteswitch to ignite fire.
Lighting Instructions:
NOTE: Knob cannot be turned from
"PILOT" to "OFF" unless knob is
pushed in slightly. Do not force.
with Continuous Pilot
Gas Control Knob
(Shown in "Pilot" postion.)
M40DV-ST

P/NXG0207
Page 16
M40DV-ST See-Thru Gas Fireplace
For Your Safety - READ BEFORE LIGHTING:
To Turn Off Gas To Appliance:
Lighting Instructions:
WARNING: If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.
nIf you cannot reach your gas supplier, call the
Fire Department.
C. Use only your hand to push in or turn the gas
control knob. Never use tools. If the knob will
not push in or turn by hand, don't try to repair it,
call a qualified service technician. Force or
attempt to repair may result in a fire or
explosion.
D. Do not use this appliance if any part has been
under water. Immediately call a qualified service
technician to inspect the appliance and to
replace any part of the control system, and any
gas control which has been under water.
A. This appliance is equipped with an ignition
system that lights the pilot burner automatically.
Do not attempt to light the pilot by hand.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next to
the floor because some gas is heavier than air
and will settle on the floor.
What To Do If You Smell Gas:
nDo not try to light any appliance.
nDo not touch any electrical switch; do not use
any phone in your building.
nImmediately call your gas supplier from a
neighbour's phone. Follow the gas supplier's
instructions.
1. Turn off remote switch.
2. Flip down the lower end louvres.
Gas
Inlet
Gas Control Switch
Shown in "On"Position
3. Turn the switch on the gas control to "Off".
4. Flip up the lower end louvres.
1. STOP! Read the safety information above on
thislabel.
2. Flip down the lower louvres on the end panel of
thefireplace.
3. Turn switch on the gas control to OFF".
4. Wait 5 minutes to clear out any gas. If you smell
gas, STOP! Follow "B" in the safety information
above on this label. If you don't smell gas, go to
the next step.
5. Turn switch on the gas control to "ON". NOTE:
This unit is equipped with an ignition system that
lights the pilot burner automatically. Do not
attempt to light the pilot by hand.
6. Turn on wall switch.
7. Flip up the lower end louvres.
8. If the fireplace does not operate, follow the
instructions "To Turn Off Gas To Appliance" and
call your service technician or gas supplier.
Operation - Model M40DV-ST-I
with Honeywell Intermittent Pilot
M40DV-ST-I

Page 17
P/NXG0207
M40DV-ST See-Thru Gas Fireplace
Maintenance
General
nHave the fireplace installation inspected yearly, including a visual
check of the vent system, the burner and the pilot flame. For
convenience a 1/8" manifold pressure tap is supplied on the gas
valve for a test gauge connection. See Figure 25.
nFor Natural Gas this appliance requires a minimum inlet pressure
of 5.5" W.C. and a manifold pressure of 3.5" W.C.
nFor Propane Gas this appliance requires a minimum inlet pressure
of 11" W.C. and a manifold pressure of 10" W.C.
nAlways keep the fireplace area clear and free of combustible
materials, as well as gasoline and other flammable vapours and
liquids.
nDo not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and any
gas control which has been under water.
CA TION
• Fireplace gas control must be in the “OFF” position and pilot
and main burners extinguished when cleaning appliance with
a vacuum.
• Glass and logs can get very hot. Handle only when cool.
Cleaning
When the fireplace is first activated, there may be some smoking and a
visible film may be left on the glass. This is a normal condition, and is
the result of burning the protective coatings on new metal.
nGlass must be cleaned periodically to remove any film (a normal bi-
product of combustion which may be visible. Film can easily be
removed by removing the door, as shown on page 13. Handle the
door carefully, and clean it with an approved glass cleaner. One of
the most effective products is Kel Kem.
nSilicone seals on inner door during initial firing will "off gas", leaving
a visual deposit of on combustion chamber walls. This can easily be
removed by following the steps described below.
nUse a vacuum cleaner or soft bristle brush to keep the control
compartment, burner, and firebox free from dust and lint.
nLogs may be cleaned periodically with a vacuum to remove soot.
WARNING:
Do not attempt to clean glass when hot.
Do not clean glass with abrasive materials as any glass
etching may cause premature glass failure.
Pilot Burner Adjustment
1. Locate Pilot Adjustment Screw. (See figure 25.)
2. Adjust pilot key to provide properly sized flame. (See figure 26).
3. After installing or servicing, leak test with a soap solution with main
burner on. Coat pipe and tubing joints, gasket etc. with soap
solution. Bubbles indicate leaks. Tighten any areas where the
bubbles appear until the bubbling stops completely.
Figure 26. Pilot Burner
Gas Control Valve
Figure 25. Sit Nova 820 gas valve.
Manifold Pressure
Test Connection
Pilot Adjustment Screw
Inlet
Pressure
Power
Generator
Wall Switch

P/NXG0207
Page 18
M40DV-ST See-Thru Gas Fireplace
Maintenance
HONEYWELL SV 9500 /SV9600
Troubleshooting Sequence
NOTE: Before Troubleshooting, Familiarize Yourself With
The Startup And Checkout Procedure.
· Turn Gas Supply off
· Set thermostat to
call for heat
SV9500/SV9600
is powered
(24 VAC nominal)
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
START
Igniter warms up
and glows red.
Pilot Valve opens.
Turn gas on.
Pilot Burner lights?
Main Valve opens?
SYSTEM OK
Unplug Pilot Burner Cable,
Measure Voltage at
SV9500/SV9600 HSI
Terminals (24 VAC
Nominal, See INSET)
eplace Igniter/
Flame od Assembly.
eplace Igniter/
Flame od Assembly.
eplace SV9500/SV9600
Measure Voltage to SV9500
/SV9600. Voltage must
be at least 19.5 VAC
Discard old Igniter/
Flame od Assembly.
eplace Igniter/Flame
od Assembly and retain.
estart Troubleshooting
Sequence. Does main
valve open?
eplace
SV9500/
SV9600
Check
Transformer
Line Volt
Supply
eplace
SV9500/
SV9600.
Save old
Igniter/Flame
od Assembly
for service.
INSET
HSI
Terminals
CHECK:
· Line voltage power
· Low voltage transformer
· Limit Controller
· Thermostat
· Wiring
· Air proving switch on
combustion air blower system
· Vent damper (if used) is open
and end switch made
Troubleshooting
If your fireplace still does not operate correctly, consult your dealer or
the manufacturer.
All service and repairs should be performed by a qualified
agency.
All spare parts, optional fans (see optional fan instruction guide , and
optional trim finishes are available from Canadian Heating Products
Inc. or your local dealer.
M40DV-ST-I
Troubleshooting
The following is a troubleshooting chart of possible problems:
PROBLEM CORRECTIVE ACTION
Noisy Pilot Flame Locate pilot adjustment screw on the
front of the gas control valve. Flame
is decreased by turning adjustment
screw clockwise.
Pilot won’t ignite Disconnect remote wires and try to
light pilot. If pilot now works, remote
connections are faulty. Check wiring
diagram figure 17.
Main burner will 1. Check wiring (see figure 17)
not light 2. Check wall switch for proper
connection.
3. Check pilot burner. If extin-
guished:
a. Allow fireplace to cool, then try to
relight.
b. If condition persists, call a
qualified service person.
M40DV-ST

Page 19
P/NXG0207
M40DV-ST See-Thru Gas Fireplace
Canadian Heating Products Inc. and/or Montigo DelRay Corp. reserves the right to make changes at any time, without
notice, in design, materials, specifications, prices and also to discontinue colors, styles and products.
Warranty
The WarrantyThe Warranty
The WarrantyThe Warranty
The Warranty
The Companies warrants the Montigo Gas Appliance to be free from defects in materials and workmanship at the time of manufacture. On the Montigo, there is a ten-
year warranty on the firebox and its components, a five-year warranty on the main burner and pilot burner, and a one-year warranty on the gas control valve and fibre logs.
Glass, plated/painted finishes, and refractory lining are exempt.
Remedy And Exclusions
The coverage of this Warranty is limited to all components of the Gas Appliance manufactured by The Companies.
This Warranty only covers Montigo Gas Appliances installed in the United States or Canada.
If the components of the Gas Appliance covered by this Warranty are found to be defective within the time frame stated (see The Companies right of investigation outlined
below . The Companies will, at its option, replace or repair defective components of the Gas Appliance manufactured by The Companies at no charge, and will also pay
for reasonable labour costs incurred in replacing or repairing components. If repair or replacement is not commercially practical, The Companies will, at its option, refund
the purchase price of the Montigo Gas Appliance.
This Warranty covers only parts and labour as provided above. In no case shall The Companies be responsible for materials, components, or construction which are not
manufactured or supplied by The Companies, or for the labour necessary to install, repair or remove such materials, components or construction. All replacement or repair
components will be shipped F.O.B. the nearest The Companies factory.
Qualifications To The WarrantyQualifications To The Warranty
Qualifications To The WarrantyQualifications To The Warranty
Qualifications To The Warranty
The Gas Appliance Warranty outlined above is further subject to the following qualifications:
(1 The Gas Appliance must be installed in accordance with The Companies installation instructions and local building codes. The Warranty on this Montigo Gas Appliance
covers only the component parts manufactured by The Companies. The use of components manufactured by others with this Montigo Gas Appliance could create
serious safety hazards, may result in the denial of certification by recognized national safety agencies, and could be in violation of local building codes. This warranty
does not cover any damages occurring from the use of any components not manufactured or supplied by The Companies
(2 The Montigo Gas Appliance must be subjected to normal use. The Gas Appliances are designed to burn gas only. Burning conventional fireplace fuels such as wood,
coal or any other solid fuel will cause damage to the Gas Appliance, will produce excessive temperatures and will result in a fire hazard.
Limitations On LiabilityLimitations On Liability
Limitations On LiabilityLimitations On Liability
Limitations On Liability
It is expressly agreed and understood that The Companies sole obligation, and purchaser's exclusive remedy under this Warranty, under any other warranty, expressed
or implied, or in contract, tort or otherwise, shall be limited to replacement, repair, or refund, as specified above.
In no event shall The Companies be responsible for any incidental or consequential damages caused by defects in its products, whether such damage occurs or is discovered
before or after replacement or repair, and whether or not such damage is caused by The Companies negligence. Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation or exclusion may not apply to you. The duration of any implied warranty with respect to this Montigo Gas Appliance
is limited to the duration of the foregoing warranty. Some states do not allow limitation on how long an implied warranty lasts, so the above may not apply to you.
Investigation Of Claims Against WarrantyInvestigation Of Claims Against Warranty
Investigation Of Claims Against WarrantyInvestigation Of Claims Against Warranty
Investigation Of Claims Against Warranty
The Companies reserves the right to investigate any and all claims against this Warranty and to decide upon method of settlement.
The Companies Are Not Responsible For Work Done Without Written Consent
The Companies shall in no event be responsible for any warranty work done without first obtaining The Companies written consent.
Dealers Have No Authority To Alter This Warranty
The Companies employees and dealers have no authority to make any warranties nor to authorize any remedies in addition to or inconsistent with those stated above.
How THow T
How THow T
How To Register A Claim Against Wo Register A Claim Against W
o Register A Claim Against Wo Register A Claim Against W
o Register A Claim Against Warrantyarranty
arrantyarranty
arranty
In order for any claim under this Warranty to be valid, The Companies must be notified of the claimed defect in writing or by telephone, as soon as reasonably possible
after the defect is discovered. Claims against this Warranty in writing should include the date of installation, and a description of the defect.
Other RightsOther Rights
Other RightsOther Rights
Other Rights
This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
NOTE: he Companies as stated above refer to - Canadian Heating Products Inc. and/or Montigo Del Ray Corp.

P/NXG0207
Page 20
M40DV-ST See-Thru Gas Fireplace
Appendix A - Termination Locations
A = clearance to the termination frame above grade, veranda, porch, deck, or
balcony [16 inches (41 cm minimum]
B = clearance to door, or sides and top of window, that may be opened [16
inches (41 cm minimum for appliances ≤100 000 BTU/H (30kW ]
C = clearance to bottom of window that may be opened horizontally [36 inches
(92 cm minimum for appliances ≤100 000 BTU/H (30kW ]
D = no clearance to permanently closed window when installed with approved
glass penetration termination
E = clearance to permanently closed window [16 inches 41 cm recommended
to prevent condensation on window]
F = vertical clearance to ventilated soffit located above the termination within a
horizontal distance of 2 feet (61 cm from the centreline of the termination [22
inches (56 cm minimum]
G = clearance to unventilated soffit
[16inches (41 cm minimum to non-combustibles]
[22 inches (56 cm minimum to combustibles]
H = clearance to outside corner [9 inches (23 cm minimum]
I = clearance to inside corner [12 inches (31 cm minimum]
J = * not to be installed above a meter/regulator assembly within
40" (103 cm horizontally from the centreline of the regulator
K = clearance to service regulator vent outlet [3 feet minimum in the United
States] [*6 feet (1.8 m minimum in Canada]
L = clearance to nonmechanical air supply inlet to building or the combustion air
inlet to any other appliance [16 inches (41 cm minimum for appliances
≤100 000 BTU/H (30kW ]
M = clearance to mechanical air supply inlet
[*6 feet (1.8 m minimum]
N = † clearance above paved sidewalk or a paved driveway located on
public property [*7 feet (2.1 m minimum]
P = clearance under veranda, porch, deck, or balcony
[16 inches (41 cm minimum‡ to non-combustibles]
[22 inches (56 cm minimum‡ to combustibles]
Q = clearance above a roof [24 inches (61 cm minimum]
R = clearance to adjacent walls and neighbouring buildings
[18 inches (46 cm minimum]
S = clearance from corner in recessed location
[12 inches (31 cm minimum]
T = maximum depth in recessed location
[48 inches (122 cm minimum]
= minimum width for back wall of recessed location
[24 inches (61 cm minimum]
V = no horizontal clearance between the frames of two terminations that are
level.
W = horizontal clearance between the frames of two terminations that are not
level. [36 inches (92 cm minimum]
†a vent shall not terminate directly above a sidewalk or paved driveway
which is located between two single family dwellings and serves both
dwellings
‡only permitted if veranda, porch, deck, or balcony has an open side that
is equal to or greater than the depth of the enclosed area
*as specified in CGA B149 Installation Codes. Note: local Codes or
Regulations may require different clearances