Montigo M38ODV ST User Manual
Installation
Operation &
Maintenance
M38ODV-ST
Outdoor
See-Thru
Direct-Vented
Gas Fireplace
Warning:
Improper installation, adjustment,
alteration, service or maintenance can
cause injury or property damage. Refer to
this manual. For assistance or additional
information consult a qualified installer,
service agency or the gas supplier.
For Your Safety:
Do not store or use gasoline
or other flammable vapors
and liquids in the vicinity of
this or any other appliance.
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:
FOR OUTDOOR
USE ONLY
Check local codes
and read all
instructions prior to
installation.
Leave this manual
with the owner.
M38ODV-ST Direct Vented Fireplace
Table Of Contents
Introduction............................................................................. 2
Installation ........................................................................ 3 - 11
Installing the Fireplace Shell........................................... 3
Installing the Gasline ...................................................... 4
The Remote Switch ....................................................... 4
Direct Vent Installation ................................................... 4
General Requirements ...................................... 4
Terminations ..................................................... 5
Horizontal Venting Runs .................................... 6
Vertical Venting Runs ........................................ 8
Finishing around the fireplace
Facing ............................................................. 8
Mantels and Surrounds ..................................... 8
Installing the Logset ....................................................... 9
Removing and Installing the Door .................................. 9
Operation
Adjusting the Center Burner ........................................ 10
Lighting Instructions - Model M38ODV-ST ................... 11
Maintenance
Cleaning ...................................................................... 12
Pilot Burner Adjustment ............................................... 12
Gas Control Valve ........................................................ 12
Troubleshooting........................................................... 12
Appendix A - Spare Parts & Accessories ............................ 13
Warranty .................................................................................14
CAUTIONS
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.
Introduction
The M38ODV-ST model with a continuous pilot, is a direct-vented
See-Thru Gas Fireplace with glass doors on two sides and an
adjustable burner
This manual covers the M38ODV-ST model unless otherwise specified. Sections which are specific to a particular model are marked with
a symbol, plus the appropriate model number.
The M38ODV-ST is rated for:
Natural Gas at 32,000 BTU/H (9.38 Kilowatts) Input
Propane at 32,000 BTU/H (9.38 Kilowatts) 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 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. When the
unit employs the optional Fan Kit, it must be electrically grounded in
accordance with CSA C22.1 Canadian Electrical Code Part 1 and/or
Local Codes.
Installations in the USA must conform to the National Fuel Gas
Code, ANSI Z223.1-1988. When the unit employs the optional Fan Kit
it must be grounded in accordance with local codes or, in the absence
of local codes, with the National Electrical Code, ANSI/NFPA 70-1987.
A manufactured (mobile) home OEM installation in the United
States must conform with the Manufactured Home Construction and
Safety Standard, Title 24 CFR, Part 3280, or, when such a standard is
not applicable, the Standard for Manufactured Home Installations,
ANSI / NCSBCS A225.1. In Canada, the installation must conform to
the Standard for Gas Equipped Recreational Vehicles and Mobile
Housing, CSA Z240.4.
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Installation
M38ODV-ST Direct Vented Fireplace
Installing The Fireplace Shell
The fireplace may be installed in any location that maintains proper
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 & Combustion Air Kit installation.
The fireplace dimensions are shown below:
Front View
Ø5"
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.
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.
Framing
Frame the fireplace cavity according to Figure 2a.
Slide the fireplace into the cavity.
Tack four studs (40" length) in place as shown in Figure 2b. Secure
the fireplace in position by nailing into these cleats.
C
C
Ø8"
38 ¼
Top View
Figure 1. Fireplace dimensions.
17 1/8
Clearances
The M38ODV-ST clearances to combustible materials are:
Top* 20"
Sides 1 1/2"
Floor 0"
Mantle** 6"
Recess Depth 17 1/8"
* Clearance from the top of the fireplace to
a combustible ceiling within the fireplace
enclosure.
** Refer to page 9.
(Minimum 1" clearance must still be maintained around the vent pipes,
except on horizontal venting sections where the top of the pipe must
have a clearance of 2")
17 1/8
41
Figure 2a. Framing dimensions.
Figure 2b. Securing the fireplace to the framing.
40
Framing Above the Fireplace
When installing a shelf or any other combustible construction over the
top of the fireplace, you must use an Offset Box (Part No DVST-CNT).
The Offset Box provides a top clearance of 16" to combustible
materials. The minumum shelf height is 49", when measuring from the
hearth to the underside of the shelf. See Figures 9 and 10.
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M38ODV-ST Direct Vented Fireplace
Installation
Installing The Gas Line
The gas line must be installed before finishing the M38ODV-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 is located behind the
removable brass trim at the bottom of the unit and need only be
attached to the gas line with an approved fitting, as required by the
applicable installation codes.
1 3/4
2 3/8
77
1 3/4
Figure 3. Gas line access.
Vent Installation
This section covers the installation of direct venting and terminations.
For a detailed diagram of allowed termination locations, see Appendix B.
Installation Requirements
The M38ODV-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".
Use only certified Montigo vent components. (Use of other parts 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
support 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
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).
* 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 M38ODV-ST is equipped with a remote-operated valve, located
behind the removable brass grille, to the right of the gas control valve
(refer to Figure 16.) The valve is pre-wired and completely self
contained to generate its own power. DO NOT connect any external
power to it.
Note: The switch location must not exceed 30' from the fireplace.
Solid vent sections may be cut less than half way from the tapered end
Venting components can be used in any combination of solid/rigid
pipe or flex pipe and in any orientation (Male connectors can face
in any direction)
n 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.
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Vent Terminations
M38ODV-ST Direct Vented Fireplace
Installation
Installing Terminations with Built-In Frames
11
PTO-3
11
1. Frame the termination opening to 11" x 11".
2. Fasten the termination to the studs using a minimum of 4
screws.
PTO-3F
Installing Terminations with MSR Frames
12
MSR
Installing Heat Guards over Terminations
PTKOG
1. Ensure that the two long mounting brackets are facing the
bottom of the termination. (See inset). This will provide more
heat protection at the top of the termination, where temperatures
are highest.
2. Attach to the faceplate of the termination using four sheet metal
screws.
12
1. Frame the termination opening to 12" x 12".
2. Fasten the termination to the studs using a minimum of 4 screws.
PTO-3
PTO-3F
Installing Terminations with MOSR Frames
MOSR
PTO-3
PTO-3F
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.
1212
12
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