Montigo MD38-DV-2 User manual

nCheck local codes and
read all instructions
prior to installation.
nLeavethismanualwith
the owner.
Modular
Gas Fireplace
MD38-DV-2
Homefire
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, altera-
tion, ser ice or maintenance can cause
injury or property damage. Refer to this
manual. For assistance or additional infor-
mation consult a qualified installer, ser ice
agency or the gas supplier.
For Your Safety:
Do not store or use gasoline
or other flammable apors
and liquids in the icinity of
this or any other appliance.
Questions? Email us at [email protected] or visit our website at www.montigo.com.

Page 2
MD38-DV-2 Homefire
Part No. XG0111
Introduction
About the M38 Series Modular Fireplaces:
The MD38-DV-2 includes a 27,000 BTU dual burner and embers. All
3 Series Modular Fireplaces allow quick and easy upgrades in the
future. The MD3 -DV-2 can be upgraded to a Wildfire Burner. Contact
your dealer for more information. The MD3 -DV-2 model is available in
four versions:
nTop Vent (Product Code MD3 DT-2)
nRear Vent (Product Code MD3 DR-2)
nIntermittent Pilot - Top Vent (Product Code MD3 DT-I-2)
nIntermittent Pilot - Rear Vent (Product Code MD3 DR-I-2)
The MD3 -DV-2 is rated for Natural Gas at 27,000 BTU/H ( .5
Kilowatts) Input or Propane at 27,000 BTU/H .5 Kilowatts) Input.
How to use this anual:
This manual covers all models and unless otherwise specified, the
designation MD3 -DV-2 refers to all models. Sections which are
specific to a particular model are marked with a symbol, plus
the appropriate model number.
Warranty and Installation Infor ation:
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. If the
optional air-circulating fan kit is installed, it must be electrically
grounded in accordance with CSA C22.1 Canadian Electrical Code
Part 1 and/or Local Codes.
Installations in the USA must conform to local codes, or in the
absense of local codes to the National Fuel Gas Code, ANSI Z223.1-
1988. If the optional air-circulating fan is installed, it must be
grounded in accordance with local codes or, in the absence of local
codes, with the National Electrical Code, ANSI/NFPA 70-1987.
Table Of Contents
Introduction ............................................................................. 2
Installation
Installing the Fireplace Shell ......................................... 3
Installing the Gasline ..................................................... 4
The Remote Switch....................................................... 4
Direct Vent Installation .................................................. 4
General Requirements...................................... 4
Terminations ..................................................... 5
Top Vent Models with horizontal runs ............... 6
Top Vent Models with vertical runs ...................
Rear Vent Models ............................................. 9
Construction around the fireplace
Facing............................................................. 10
Mantels and Surrounds................................... 10
Wiring ................................................................10 - 11
Installing the Logset .................................................... 11
Removing and Installing the Insert .............................. 11
Removing and Installing the Door ............................... 11
Operation ........................................................................ 13 - 15
Maintenance ...................................................................15 - 16
Warranty................................................................................. 19
Appendix
A. Accessories ............................................................ 1
B. Termination Locations ............................................ 19
CAUTIONS
Due to its high operating temperatures, the appliance
should be located out of traffic & away from furniture and
draperies.
nChildren and adults should be alerted to the hazards
of the high surface temperature, which could cause
burns or clothing ignition.
nYoung children should be carefully supervised when
they are in the same room as the appliance.
nClothing or other flammable materials should not be
placed on or near the appliance.

Page 3
MD38-DV-2 Homefire
Part No. XG0111
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 installation. Refer to page 4 - Vent
Installation for more information.
The fireplace dimensions are shown below:
Installation
Figure 3. Corner framing dimensions.
Figure 2. Framing dimensions.
* When sheetrock is
not used behind the
fireplace, framing
depth may be
reduced to 14 3/4"
37 3/4
15 1/2
40 3/4
43 7/8
24 1/8
0" clearance
to corners only
Fra ing
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.
14 3/4
38
33
Ø7
C
Ø4
5 1/2
Top Vent 14 3/4
28 3/4
34 3/4
Ø7
Ø4
Front View Rear Vent
Clearances
These clearances apply to all dimensions except the framed opening,
where the clearance to combustibles is 0". The MD38-DV-2 clearances
to combustible materials are:
Top - Rear Vent* 7 ¼"
Top-TopVent*** 32"
Back 0"
Side 1 ½"
Floor 0"
Mantle** 12"
* Clearance from the top of the fireplace to a combustible
ceiling within the fireplace enclosure.
** Refer to page 10.
*** If the standard elbow (MEL90) is used with the Low
Clearance Sleeve (CRS30) the Top Clearance is 15".
If the Low Clearance Sleeve (CRS30) is NOT used
over the elbow, the Top Clearance is 32".
Figure 1. Fireplace dimensions.
When installing a shelf over the top of the fireplace, the following
guidelines must be adhered to: For Rear Vent models (MD38-DR-2),
the minimum clearance from the top of the fireplace to a shelf is 7 ¼".
For Top Vent models (MD38-DT-2), the minimum clearance when
using the CRS30 is 15". (Minimum 1" clearance must still be maintained
around the vent pipes.)
Top Vent
Rear Vent
Figure 4. Framing for shelves over the fireplace.
Unprotected combustible walls which are perpendicular to the
fireplace opening, must not project beyond the shaded area shown in
Figure 19b.
For protection against freezing temperatures, it is recommended that
outer walls of the chase be insulated with a vapour barrier. This will
reduce the possibility of a cold-air convection current on the fireplace.

Page 4
MD38-DV-2 Homefire
Part No. XG0111
Vent Installation
This section covers the installation of direct venting and terminations.
Installation Require ents
nMD3 -DV-2 fireplaces are certified for use with Montigo Standard
Series (4" / 7") venting components
nMinimum 1" clearance to co bustibles required for vent pipes
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.
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)
Vent Ter inations
Selecting A Ter ination Location
Choosing your vent termination location will help to determine whether
you need to use a top vent or rear vent fireplace. Figure 6, below,
shows typical fireplace locations and the venting options they provide.
For a more detailed diagram of allowed termination locations, see
Appendix B.
Cautions:Cautions:
Cautions:Cautions:
Cautions:
Installing The Gas Line
The gas line must be installed before finishing the MD3 -DV-2 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/ " 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.
Installation
Figure 6. Fireplace locations and vent terminations.
Note: After gas line is connected, each appliance connection,
valve and valve train must be checked while under
normal operating pressure with either a liquid solution, or
leak detection device, to locate any source of leak. Tighten
any areas where bubbling appears or leak is detected until
bubbling stops completely or leak is no longer detected.
DO NOT use a fla e of any kind to test for leaks.
Installing The Remote Switch
The MD38-DV-2's gas valve, located behind the lower brass trim, may
be connected to a wall switch. The valve generates its own power on
a illivolt circuit. Use only low voltage wire, and DO NOT connect
any external power to it.
Refer to Figure 26 for wiring requirements.
Note: The switch location must not exceed 30' from the fireplace.
Figure 5. as line access.
2 1/2 Gasline access
6 x 2 1/2"
1
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).
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. MTKOG)
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.

Page 5
MD38-DV-2 Homefire
Part No. XG0111
Installing Ter inations with Built-In Fra es
Installing Ter inations with MSR Fra es
12
12
1. Frame the termination opening to 12" x 12".
2. Fasten the termination to the studs using a minimum of 4 screws.
11
11
1. Frame the termination opening to 11" x 11".
2. Fasten the termination to the studs using a minimum of 4
screws.
Installing Ter inations with MOSR Fra es
1212
12
MOSR
1. Frame the termination opening to 12" x 12".
2. Fasten the MOSR frame to the interior side of the studs using a
minimum of 4 screws.
3. Insert the termination into the MOSR frame as shown here, and
attach by screwing through the four pilot holes in the termination.
MSR
MTO-3
MTO-3F
MTO-3
MTKOG
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 Heat Guards over Ter inations
Installation

Page 6
MD38-DV-2 Homefire
Part No. XG0111
Installation
Top Vent Venting Runs
Before you install any venting, you must determine whether the
venting run will be acceptable. Unacceptable venting can affect the
fireplace's combustion.
The Venting Graph
Measure the vertical height from the fireplace hearth to the centre of
the termination and the horizontal run from the from the fireplace flue
collar to the wall flange of the termination. Plot on the Venting Graph
(Fig. 7) with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 84" and
the horizontal run to the wall flange of the vent
termination is 36", this would be an acceptable
installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 90" and
the horizontal run to the wall flange of the vent
termination is 120", this would be an acceptable
installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace
is 72" and the horizontal run to the wall flange of the
vent termination is 84", this would NOT be an
acceptableinstallation.
Figure 7. Venting raph
Figure 8. Heat Shield. Install by sliding over the vent pipe where
it passes through combustible construction.
Heat Shields
Due to high flue temperatures, heat shields are required on all 3
Series Modular Direct Vent installations (except those with vertical
terminations) at the point where the
venting connects to the termination.
With the heat shield, vent clear-
ances can be maintained at 1".
012 24 36 48 60 72 84 96 108 132120 144 156 168 180
Horizontal Run (in.)
Hearth
0
12
24
36
48
60
72
84
96
108
Top Vent
Installation Of Top Vent DV
The following venting components are available for the MD38-DV-2
Top Vent:
A - Termination MTO-3 (3" length)
MTO-3F (3" length)
B - Stucco Kits MSR (stucco frame)
MOSR (stucco can)
BSR (brick can)
D - Flex sections MFL-1 (12" section)
MFL-18 (18" section)
MFL-2 (24" section)
MFL-3 (36" section)
MFL-4 (48" section)
E - Solid sections EXT-18 (18" f/f section)
MEXT-1 (12" m/f section)
MEXT-2 (24" m/f section)
MEXT-3 (36" m/f section)
MEXT-4 (48" m/f section)
F - Elbows MEL-90M (m/m 90° elbow)
MEL-90F (f/f 90° elbow)
MEL-90FM (f/m 90° elbow)
EEL-45 (f/m 45° elbow)
NOTES: All dimension lengths for vertical or horizontal runs are
measured from center of the vent pipe.
Venting runs must fall within the limits set by the
venting graph (see Figure 7).

Page 7
MD38-DV-2 Homefire
Part No. XG0111
Installation
Example 1:
For our shortest venting configuration use components A and F (see
Figure 9a). This configuration is suitable for installations where the
fireplace backs directly against 4" stud wall. For deeper walls, use an
MEL-90FM elbow and an EXT-1 extension, which can be cut to the
required length.
Figure 9a. Typical Top Vent installation. If the 90° elbow is installed
directly on the fireplace, the height to the center of the
termination is 44".
Horizontal Venting
Figure 9b. Typical Top Vent installation. The solid sections can be
used in various combinations to obtain the desired vent
run. The vent run must fall within the limits set by the
venting graph.
90°Elbow
MEXT Section
Heat Shield
Exa ple 2:
A 10' section and elbow (MIHR-10) used in conjunction with 3 ft. flex
section (MFL-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 10 and 11).
"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 with no vertical rise must not exceed
maximum horizontal length of 3 feet (see Figure 12). Flex runs over 3
feet must fall within the limits set by the venting graph, and must have a
minimum vertical rise of 3" per foot of flex.
Top Vent
Figure 10. Extended Installation using a combination of solid and
flex venting. Use the vent graph to determine your
allowable run, then select appropriate components.
Figure 11. Retracted Installation using a combination of solid and
flex venting. Use the vent graph to determine your
allowable run, then select appropriate components.
Figure 12. Horizontal flex installation with no vertical rise.
Hearth
Termination
Exterior
Wall
3' max.
Flex Section
Hearth
Flex Section Termination
Exterior
Wall
126"
30" Max.
Solid Section w/
90°Elbow
Heat
Shield
Heat
Shield
Hearth
Flex Section
Solid Sections Termination
Exterior
Wall
Heat
Shield
150" max.
30" max.
Heat Shield
MEL-90F/F Elbow
Termination
Termination

Page 8
MD38-DV-2 Homefire
Part No. XG0111
2' min.
Storm collar
Support ring
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support plate
Firestop
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 1 " (1 1/2 feet) from a parapet wall.
nMaximum vent height is 35 feet above fireplace.
Note: Flame characteristics will change if the maximum vent
height is used.
nMinimum clearances 1" from vent to all combustible materials
must be maintained.
Figure 13. Straight, vertical venting using required MXT-10 adaptor.
nA maximum of two offsets (each offset has two 90° bends) may be
made and shall not exceed total length of 25% of the vertical vent height,
when measured center to center of piping.
Example: Typical vent installation.
20' vertical vent
2 - 2' offsets required
25% of 20' = 5' max. offset allowed
This venting configuration meets requirements.
A - Termination MVTK-1
B - Flex sections MFL-1 (12" section)
MFL-2 (24" section)
MFL-3 (36" section)
MFL-4 (48" section)
C - Solid sections MEXT-1 (12" section)
MEXT-2 (24" section)
MEXT-3 (36" section)
MEXT-4 (48" section)
D - Support Ring & Plate MSPXT-8(7"dia.)
E - Firestop FS-7 (7" dia.)
F - Roof Flashing MRF-7 (1/12 - 7/12 pitch)
MRF-12 (7/12 - 12/12 pt.)
MRF-16 (12/12 - 16/12 pt.)
Figure 14b. Vertical venting with 2 offsets (1 offset= two 90° bends).
Figure 14a. Vertical venting with 1 offset (1 offset= two 90° bends).
2' min.
2'
Storm collar
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support straps or
support plate & ring
Firestop
Firestop
Firestop
Support plate
& ring
35' max.
35' max.
Top Vent
Storm collar
Support ring
MEXT
Solid Section
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support plate
Firestop
Firestop
2' min.
MXT-10
Adaptor
MEXT
Flue
Collar
35' max.

Page 9
MD38-DV-2 Homefire
Part No. XG0111
Installation Rear Vent
2. 45° Corner Installation.
Attach an EEL-45 (45° elbow) directly onto the flue collar. Cut the
EXT-1 to suit, and attach it to the EEL-45. Slide the fireplace into
position and attach to the termination.
Rear Vent Venting Runs
The MD38-DV-2 Rear Vent has three possible installations which do
not require vertical lift:
Heat Shields
Due to high flue temperatures, heat shields are required on all MD3 -
DV-2 installations (except those with vertical terminations) at the point
where the venting connects to the termination. With the heat shield,
vent clearances can be maintained at 1".
See Figure .
1. Straight Installation.
The height from the hearth to the center of the termination is
2 ¾". MD3 -DV-2 Rear Vent versions are supplied with an 1 "
extension pipe (EXT-1 ) with female/female connections. For
shorter installations, cut the EXT-1 to the desired length.
For extended installations, use the EXT-1 section as supplied for
an 1 " vent run.
Note: For Rear Vent models, maximum horizontal run with no
vertical lift must never exceed 1 ".
Flue Collar
Heat Shield
EXT-18
Termination
Figure 15. Extended installation.
Heat Shield
EXT-18
Termination
EEL-45
Elbow
Flue Collar
Figure 16. Corner installation.
3. Corner Installation - 45° or less.
Use an MTO-3 termination and an MFL-1 or MFL-1 (12" or 1 "
compressed length) and a frame, if appropriate. Flex may be
turned to obtain desired degree of angle required but must not
exceed 45°.
Figure 17. Flex installation.
Heat Shield
Termination
Flex
Section
Flue Collar

Page 10
MD38-DV-2 Homefire
Part No. XG0111
Installation Rear Vent
B. Multi-Elbow Installations
For more diffiicult installation situations, the MD3 -DV-2 Rear Vent
may be installed with two - 90° elbows and up to 15' of horizontal run.
If using this installation option, you must adhere to the following
guidelines:
nthe first 90° elbow must be placed directly on the flue collar
nyou must have a minimum vertical lift of 50" (measured from the
hearth)
nyour vent run must fall within the limits set by Figure 1 a
Before you install any venting, you must determine whether the
venting run will be acceptable. Unacceptable venting can affect the
fireplace's combustion.
The Venting Graph
Measure the vertical height from the fireplace hearth to the centre of
the termination and the horizontal run from the from the fireplace flue
collar to the wall flange of the termination. Plot on the Venting Graph
(Fig. 1 a) with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 84" and
the horizontal run to the wall flange of the vent
termination is 36", this would be an acceptable
installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 90" and
the horizontal run to the wall flange of the vent
termination is 126", this would be an acceptable
installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace
is 78" and the horizontal run to the wall flange of the
vent termination is 108", this would NOT be an
acceptableinstallation.
Figure 18a. MD38-DV-2 Rear Vent Venting raph
8"
H
L
Figure 18b.Multi-elbow installation. Distance 'H' must be a minumum
of 50". The vent run must comply with figure 18a.
012 24 36 48 60 72 84 96 108 132120 144 156 168 180
Horizontal Run (in.)
Hearth
0
12
24
36
48
60
72
84
96
108
NOTES: All dimension lengths for vertical or horizontal runs are
measured from center of the vent pipe.
Venting runs must fall within the limits set by the
venting graph (see Figure 1 a).
Installation Of Rear Vent DV
MD3 -DV-2 Rear Vent versions are supplied with an EXT-1
(female/female) section. In addition, the following venting compo-
nents are available for Rear Vent installations:
A - Termination MTO-3 (3" length)
MTO-3F (3" length)
B - Stucco Kits MSR (stucco frame)
BSR-4 (4" brick frame)
BSR-6 (6" brick frame)
MOSR (stucco can)
D - Flex sections MFL-1 (12" section)
MFL-1 (1 " section)
MFL-2 (24" section)
MFL-3 (36" section)
MFL-4 (4 " section)
E - Solid sections MEXT-1 (12" section)
MEXT-2 (24" section)
MEXT-3 (36" section)
MEXT-4 (4 " section)
F - 90 degree elbow MEL-90M (m/m 90° elbow)
MEL-90F (f/f 90° elbow)
MEL-90FM (f/m 90° elbow)
EEL-45 (f/m 45° elbow)
min "
max 1 "