Montigo M40DV-ST User manual

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.
For Your Safety:
Do not store or use gaso-
line or other ammable
vapors and liquids in
the vicinity of this or any
other appliance.
See-Thru
Gas Fireplace
M40DV-ST
M40DV-ST (MH)
Installer: Leave this manual
with the appliance.
Consumer: Leave this man-
ual for future reference.
Check local codes and read all
instructions prior to installation.
®
CUS
WARNING!
Improper installation, adjustment,
alteration, service or maintenance
can cause injury or property
damage. Refer to this manual. For
assistance oradditionalinformation
consult a qualied installer, service
agency or the gas supplier.
Safety Notice:
Glass doors on gas fireplaces are
extremely hot while the fireplaces is on
and remain hot even after the fireplace
has been turned off. Safety screens
are available and can reduce the risks
of severe burns. Please keep children
away from the fireplace at all times.

P/N XG0207
Page 2
M40DV-ST See-Thru Gas Fireplace
Warning:
Read this manual before installing, operating or troubleshooting this
appliance. Please retain this owner's manual for future reference.
Congratulations
Congratulations on selecting a Montigo M-Series gas fireplace, an
elagent and well designed gas fireplace built to your specifications.
The Montigo gas fireplace you have selected is designed to provide
the utmost in safety, reliability, and engineering standards.
As the owner of this new fireplace, you'll want to read and carefully
follow all the instructions contained in this Installation, Operations and
Maintenance manual. Pay special attention to all cautions, warnings,
and Important warnings.
This owner's manual should be retained for future reference. We
suggest that you keep it with all your other important documents and
product manuals.
The information contained in this owner's manual, unless noted other-
wise, applies to all models, and gas control systems.
Your new Montigo M-Series gas fireplace will give you years of
durable, reliable use. Welcome to the Montigo family of gas fireplace
products.
Safety Alert Key:
• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.
• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.
• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE: Used to address practices not related to personal injury.
•Important: Used to address practices not related to personal injury.
Congratulations
Safety Alert Key
Introduction............................................................................. 3
Installation
IInstalling the Fireplace Shell ......................................... 4
Installing the Gasline...................................................... 5
The Remote Switch........................................................ 5
Direct Vent Installation ................................................... 6
Terminations ...................................................... 6
Converting to Top Vent or Side Vent model
(Installing the Flue cover) .................................. 7
Rear Vent Venting Requirements ...................... 7
Rear Vent Horizontal Venting Runs ................... 8
Rear Vent Vertical Venting Runs ....................... 9
Top Vent Venting Requirements ...................... 10
Top Vent Horizontal Venting Runs ................... 11
Top Vent Vertical Venting Runs ....................... 12
Reduced Vertical Venting ................................ 13
Table Of Contents
Construction around the fireplace
Facing ............................................................ 13
Mantels and Surrounds ................................... 13
Wiring ............................................................ 14
Removing and Installing the Door ............................... 14
Installing the Logset ..................................................... 15
Installing the Ember Material........................................ 15
Operation........................................................................15 - 18
Model M40DV-ST......................................................... 16
Model M40DV-ST-I....................................................... 17
Model M40DV-ST-F...................................................... 18
Maintenance................................................................... 19 - 20
Warranty................................................................................. 21
Appendix
A. Termination Locations.............................................. 22
B. Mobile Home Approved Models............................... 23
C. State of Massachusetts / Amendment..................... 24
Notes ......................................................................... 25

Page 3
P/N XG0207
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:
Model M40DV-ST (continuous pilot)
Model M40DV-ST-I (intermittent pilot)
Model M40DV-ST-F (SIT Electronic)
Model M40DV-ST-MH (mobile home)
For Mobile Home Approved Models See Appendix B
This manual covers installation, operation and maintenance. Light-
ing, operation and care of this fireplace can be easily performed by
the homeowner. However, all installation and service work should be
performed by a qualified or licensed installer, plumber, or gasfitter
who is qualified or licensed by the state, province, region, or govern-
ing body in which the appliance is being installed.
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:
Natural Gas at 30,000 BTU/H (8.79 Kilowatts) max. input, and
24,000 BTU/H (7.03 Kilowatts) min. input.
Propane 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:
Modification of the fireplace and/or components including Direct-
Vent assembly or glass doors.
Use of any component part not manufactured or approved by
Montigo in combination with this Montigo fireplace system.
Installation other than as instructed in this manual.
Consult your local Gas Inspection Branch on installation require-
ments 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 fire-
place's fans 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 ab-
sense 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. See Appendix C for replace installations
within the State of Massachusetts.
CAUTION!
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.

P/N XG0207
Page 4
M40DV-ST See-Thru Gas Fireplace
Installation
Installing The Fireplace Shell
The fireplace may be installed in any location that maintains clear-
ances 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
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"
Flue Cover 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 nish enclosing the replace can be
constructed on either the left or right side.
End View Top View
Front View
Figure2c.FlueCoverclearancestocombustibleswheninstallingthe
unit in a top vent conguration.
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.

Page 5
P/N XG0207
M40DV-ST See-Thru Gas Fireplace
Installing The Gas Line
The gas line must be installed before finishing the M40DV-ST fire-
place. 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 up-
stream 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.
• Only use gas shut-o valves approved for use by the state, province,
region, or governing body, in which the appliance is being installed, or
as required by the applicable installation codes.
• Flexible gas connectors must not exceed 3 feet in length, unless it is
allowable within 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 detec-
tion 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 ame 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 Appen-
dix A.
Installation Requirements
The M40DV-ST fireplace uses Premium venting components with:
5" inner dia. /8" outer dia.
Minimum 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".
Useonly certiedMontigoventcomponents.(Useofotherparts
will void the Montigo warranty, and may impede the operation of
the fireplace.)
All joints must be secured with a minimum of two screws per joint
Vent terminations must not be recessed in walls or siding
Horizontal runs must be supported by a minimum of two supports
per horizontal run. A minimum of one screw on each side of sup-
port is also required
Flex vent sections may be stretched up to 50% of their total length
(eg. a 24" section may be stretched to 36")
Maximum horizontal run for a flex section with no vertical rise is 3
feet.
Flex vent sections over 3 feet must fall within the limits set by the
venting graph and must have a minimum vertical rise of 3 inches
per foot of flex.
Venting components can be used in any combination of solid/rigid
Solid vent sections may be cut less than half way from the tapered
end
Cautions:
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)
Do not obstruct, or attempt to conceal, the vent termination.
These actions will affect the operation of the fireplace, and may
be hazardous.
In heavy snow areas, take extra care to prevent snow buildup
from obstructing the vent termination.

P/N XG0207
Page 6
M40DV-ST See-Thru Gas Fireplace
Installation
Installing Heat Guards over Terminations
1. Ensure that the two long mounting brackets are facing the bot-
tom 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 PT0-3 termination with the MSR frame.
Figure 4c. Installing a PT0-3 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
PTO-3F
11
11
Figure 4a. Installing a PT0-3F termination.

Page 7
P/N XG0207
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.
the 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.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 82", and the hori-
zontal run to the wall flange of the vent termination is 156", this
would be an acceptable installation.
Example B: (Acceptable Installation)
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.
Example C: (Unacceptable Installation)
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
Figure 5a. Installing the ue cover.
Figure5b.Fluecoverinstallation
for side vented replace.
Figure5c.Fluecoverinstallation
for top vented replace.
Installation

P/N XG0207
Page 8
M40DV-ST See-Thru Gas Fireplace
Short Configurations:
For installations straight through the wall, use an PTO-3/-3F termina-
tion and PXT-5 or PXT-10 to achieve the desired length. The maxi-
mum 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 conjunc-
tion 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 instal-
lations. NOTE: Flex section must not exceed maximum horizontal
length of 3 feet, and for this application the top clearance is to the
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.
Figure9.Extendedhorizontalinstallationusingacombinationofrigid
and ex venting.
Figure8.HeatShieldforshorthorizontalinstallation.Installbysliding
overtheventpipewhereitconnectstothetermination.
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 cav-
ity. 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)
Installation Rear Vent

Page 9
P/N XG0207
M40DV-ST See-Thru Gas Fireplace
Vertical Vent Installations
Vertical 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.
Maximum vent height is 30 feet above fireplace.
Note: Flame characteristics will change if the maximum vent
height is used.
Minimum clearance to combustible construction around the
vent pipe is 1" on all sides must be maintained, except on hori-
zontal venting where the top of the pipe must have a clearance of
at least 2".
2. Oset Vertical Installations
Amaximum oftwo offsets (each oset has two90° 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.
Figure11b.Verticalventingwith2osets(1oset=two90° bends).
* If reducing to 4"/7" venting see gure 19.
Figure11a.Verticalventingwith1oset(1oset=two90°bends).
* If reducing to 4"/7" venting see gure 19.
1. Straight Vertical Installation
Figure10.Straight,vertical venting.Whenthe ventrunis notre-
duceduseaPEL-90F/Felbow,whichisconnecteddirectly
tothereplaceuecollar.Inthiscase,thePXT-10adaptor
isnotneeded.*Ifreducingto4"/7"ventingseegure19.
Installation Rear Vent

P/N XG0207
Page 10
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.
for installations with horizontal venting runs of 0-16 feet, use the
vent graph, as described below
the 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.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 72", and the hori-
zontal run to the wall flange of the vent termination is 120", this
would be an acceptable installation.
Example B: (Acceptable Installation)
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.
Example C: (Unacceptable Installation)
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° el-
bow)
PEL-90FF (f/f 90° elbow)
Installation Top Vent
Figure 12. Rear Vent Venting Graph.
Height to center
of vent pipe.
Hearth
Vent Rise (feet)
Vent Run (feet)

Page 11
P/N XG0207
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 maxi-
mum 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 instal-
lations. NOTE: Flex section must not exceed maximum horizontal
length of 3 feet. (See Figure 15.)
Top Vent
Figure 15. Horizontal ex installation.

P/N XG0207
Page 12
M40DV-ST See-Thru Gas Fireplace
Installation
Installation Of Vertical Vent DV
Vertical 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.
Maximum vent height is 30 feet above fireplace.
Note: Flame characteristics will change if the maximum vent
height is used.
Minimum clearance to combustible construction around the
vent pipe is 1" on all sides must be maintained, except on hori-
zontal venting where the top of the pipe must have a clearance of
at least 2".
Amaximum oftwo offsets(eachosethas two90°bends) maybe
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.)
Figure18.Vertical ventingusing2osets(1 oset=two 90°bends).
* If reducing to 4"/7" venting see gure 19.
Figure17.Vertical venting using1oset(1 oset= two 90°bends).
* If reducing to 4"/7" venting see gure 19.
Figure 16. Straight, vertical venting.
* If reducing to 4"/7" venting see gure 19.
Top Vent

Page 13
P/N XG0207
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: LOUVRE TRIMS AND FIREPLACE FRAME
MUST NOT BE OBSTRUCTED IN ANY WAY - to do so restricts
theairsupplyforthecontrolcompartmentsandheatexchanger
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 re-
place, as this will obstruct the door removal. See Figure 20c.
Installation
Mantels & Surrounds
NOTE: Mantel clearances are for fire hazard prevention to combus-
tible 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 melt-
ing, deformation, discoloration or premature failure of T.V. and radio
components.
Painting:
Figure 20a. Combustible mantles and facings.
Figure 20b. Combustible surrounds. Top view.
Special care is recommended by the Master Painters and Decorators
Association, when painting the fireplace surrounds, to select and ap-
ply 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
Figure19.ReducedVerticalventingapplicationfrom5"/8"to4"/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.

P/N XG0207
Page 14
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
Figure21. WiringfortheM40DV-ST-IwithHoneywellgascontrol
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 gure 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.
Figure20c.Whenusingatilesurround,donottileovertheoutside
Cautions:
DO NOT OPERATE THIS FIREPLACE WITH-
OUT THE GLASS DOOR OR WITH A BROKEN
GLASS DOOR.
CAUTION!
Honeywell (Q3450)
Pilot Assembly
Pilot Electrical
Harness Connector
Honeywell Gas
Control (SV9501M)
Gas Control
Connector
Junction Box
115VAC
24VAC
40 VA
Transformer
Black
White
Green
Gnd Screw
Wall Switch
Fan Plug
Receptacle

Page 15
P/N XG0207
M40DV-ST See-Thru Gas Fireplace
Figure 22c. Removing the door.
Installation Operation
Lighting Instructions
See Pages 16-18.
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.
To raise the flame height, turn the black knob (located behind the
lower trim) counterclockwise.
To lower the flame height, turn clockwise.
Figure 24. 'Hi-Lo' Adjustment on the M40DV-ST'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: 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 plac-
ing the embers.
Note: M40DV-ST-I (electronic ignition) or M40DV-ST-MH
(mobilehome)modelsdonotfeaturehi/loadjustment.
Forelectronicignition(HSI)modelsseegure21,for
mobile home approved models see Appendix B.
WARNING!
Do not attempt to clean glass when hot.
Do not clean glass with abrasive materials as any glass etch-
ing may cause premature glass failure.

P/N XG0207
Page 16
M40DV-ST See-Thru Gas Fireplace
For Your Safety - READ BEFORE LIGHTING:
WARNING: If you do not follow these instructions exactly, a re or explosion
may result causing property damage, personal injury or loss of life.
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 qualied serv-
ice technician. Force or attempt to repair may result in
a re or explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualied 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 oor be-
cause some gas is heavier than air and will settle on
the oor.
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 neigh-
bour's phone. Follow the gas supplier's instruc-
tions.
If you cannot reach your gas supplier, call the Fire
To Turn Off Gas To Appliance:
Operation - Model M40DV-ST
3. Push in gas control knob slightly and turn clock-
wise to "Off". Do not force.
4. Flip up the lower end louvres.
1. Turn off remote switch.
2. Flip down the lower end louvres.
1. STOP! Read the safety information above on this
label.
2. Flip down the lower louvres on the end panel of the
replace.
3. Push in gas control knob and turn clockwise to
"OFF."
4. Wait ve (5) minutes to clear out any gas. Smell for
gas, including near the oor. If you then 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. Locate pilot burner (See illustration at right.) and fol-
low steps below.
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. Re-
lease the knob and it will pop back up. Pilot should
remain lit. If it goes out repeat steps 3 through 8.
If knob does not pop up when
released. Stop and immediately
call your service technician or gas
supplier.
If the pilot will not stay lit after sev-
eral tries, turn the gas control knob
to "OFF" and call your service
technician or gas supplier.
8. Push in gas control knob and turn counterclockwise
to "ON."
9. Flip up the lower louvres.
10.Turn on remote switch to ignite re.
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

Page 17
P/N XG0207
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 re or explosion
may result causing property damage, personal injury or loss of life.
If 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 qualied service technician. Force or at-
tempt to repair may result in a re or explosion.
D. Do not use this appliance if any part has been
under water. Immediately call a qualied serv-
ice 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 sys-
tem that lights the pilot burner automatically. Do
not attempt to light the pilot by hand.
B. BEFORE LIGHTING smell all around the appli-
ance area for gas. Be sure to smell next to the
oor because some gas is heavier than air and
will settle on the oor.
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
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
this label.
2. Flip down the lower louvres on the end panel of
the replace.
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 at-
tempt to light the pilot by hand.
6. Turn on wall switch.
7. Flip up the lower end louvres.
8. If the replace does not operate, follow the in-
structions "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

P/N XG0207
Page 18
M40DV-ST See-Thru Gas Fireplace
with Proame SIT Electronic Ignition
Operation - Model M40DV-ST-F
with American Flame Electronic Ignition
For Your Safety - READ BEFORE LIGHTING:
WARNING: If you do not follow these instructions exactly, a re or explosion may
result causing property damage, personal injury or loss of life.
To Turn Off Gas To Appliance:
Lighting Instructions:
If 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 qualied service technician. Force or at-
tempt to repair may result in a re or explosion.
D. Do not use this appliance if any part has been
under water. Immediately call a qualied serv-
ice 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 sys-
tem that lights the pilot burner automatically. Do
not attempt to light the pilot by hand.
B. BEFORE LIGHTING smell all around the appli-
ance area for gas. Be sure to smell next to the
oor because some gas is heavier than air and
will settle on the oor.
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
neighbour's phone. Follow the gas supplier's
instructions.
1. Turn off remote switch.
2. Flip down the lower trims.
3. Turn the incoming gas control valve to "Off".
4. Flip UP the lower trims.
1. STOP! Read the safety information above on
this label.
2. Flip down the lower trims.
3. Turn Incoming gas valve to the ON" position.
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 wall switch "ON".
6. If the Fireplace does not light, the System will cy-
cle through two trials, (one minute audible click-
ing, thirty seconds of silence, and then another
one minute of audible clicking). If the system
locks out due to inadequate gas ow, refer to
"Troubleshooting", Page 20.
7. After completion of the information in the Trou-
bleshooting section, Repeat step 5.
8. If the system will not function correctly, follow the
instructions "To Turn Off Gas To Appliance" and
call your service technician or gas supplier.
EV1 (Pilot
burner)
EV2 (Main
burner)
Pilot Adjust Screw
Lockout Reset Key
Diagnostic Terminal
Power
Command (Wall
switch)
Pilot Sensor
Igniter
Ground
EV1 (Pilot burner)
EV2 (Main burner)
Gas "Out"
Gas "In"
Incoming Gas
Line, Shut-o
Valve
To replace
Main burner
M40DV-ST-F
with Proame SIT Electronic Ignition

Page 19
P/N XG0207
M40DV-ST See-Thru Gas Fireplace
Maintenance
General
Have the fireplace installation inspected yearly, including a visual
check of the vent system, the burner and the pilot flame. For con-
venience a 1/8" manifold pressure tap is supplied on the gas valve
for a test gauge connection. See Figure 25.
For Natural Gas this appliance requires a minimum inlet pressure
of 5.5" W.C. and a manifold pressure of 3.5" W.C.
For Propane Gas this appliance requires a minimum inlet pres-
sure of 11" W.C. and a manifold pressure of 10" W.C.
Always keep the fireplace area clear and free of combustible
materials, as well as gasoline and other flammable vapours and
liquids.
Do not use this appliance if any part has been under water. Imme-
diately 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.
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.
Glass 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 eective products is Kel Kem.
Silicone seals on inner door during initial firing will "off gas", leav-
ing a visual deposit of on combustion chamber walls. This can
easily be removed by following the steps described below.
Use a vacuum cleaner or soft bristle brush to keep the control
compartment, burner, and firebox free from dust and lint.
Logs may be cleaned periodically with a vacuum to remove soot.
Pilot Burner Adjustment
1. Locate Pilot Adjustment Screw. (See gure 25.)
2. Adjust pilot key to provide properly sized flame. (See gure 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
WARNING!
Do not attempt to clean glass when hot.
Do not clean glass with abrasive materials as any glass etch-
ing may cause premature glass failure.
Cautions:
DO NOT OPERATE THIS FIREPLACE WITH-
OUT THE GLASS DOOR OR WITH A BROKEN
GLASS DOOR.
CAUTION!
CAUTION!
 Fireplace gas control must be in the “OFF” position and pilot
and main burners extinguished when cleaning appliance with
a vacuum.
Doors can get very hot. Handle only when cool.

P/N XG0207
Page 20
M40DV-ST See-Thru Gas Fireplace
Maintenance
Troubleshooting
If your fireplace still does not operate correctly, consult your dealer or
the manufacturer.
All service and repairs should be performed by a qualied
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 gure 17.
Main burner will 1. Check wiring (see gure 17)
not light 2. Check wall switch for proper con-
nection.
3. Check pilot burner. If extinguished:
a. Allow fireplace to cool, then try to
relight.
b. If condition persists, call a qualified
service person.
M40DV-ST
H-Series DF-A Troubleshooting
Follow this information to reset the SIT System:
1. Locate the lead to the battery backup, (remove)
(Refer to schematic, below)
2. Locate the AC/DC wall transformer, (Unplug connector)
(Refer to schematic, below)
f your fireplace still does not operate correctly, consult your dealer or
the manufacturer.
M40DV-ST-F
1.
2.