Montigo MD44 DV User Manual
MD44-DV Direct Vent Vented Fireplace
Questions? Email us at fireplaces@montigo.com or visit our website at www.montigo.com.
Installation
Operation &
Maintenance
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.
MD44-DV
Direct-Vented
Gas Fireplace
n Check local codes and
read all instructions
prior to installation.
n Leave this manual with
the owner.
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.
Part No. XG0120
Page 1
MD44-DV Direct Vent Vented Fireplace
Table Of Contents
Introduction ............................................................................. 2
Installation ........................................................................ 3 - 12
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 ...................8
Rear Vent Models .............................................9
Construction around the fireplace
Facing............................................................. 10
Mantels and Surrounds................................... 10
Installing the Logset .................................................... 10
Pilot Burner Adjustment .............................................. 11
Gas Control Valve .......................................................11
Optional Blowers .........................................................11
Removing and Installing the Insert ..............................12
Removing and Installing the Door ............................... 12
Operation ............................................................................... 13
Maintenance .......................................................................... 14
Warranty ................................................................................. 15
Introduction
The MD44-DV is a direct-vented gas fireplace equipped with a
double burner. It is available in four models:
nTop Vent (Model MD44DT)
nRear Vent (Model MD44DR)
nIntermittent Pilot - Top Vent (Model MD44DT-I)
nIntermittent Pilot - Rear Vent (Model MD44DR-I)
This manual covers both models and unless otherwise specified, the
designation MD44-DV refers to both models. Sections which are
specific to a particular model are marked with a symbol,
plus the appropriate model number.
The MD44-DV is rated for:
n Natural Gas at 36,000 BTU/H (10.5 Kilowatts) Max. Input, and
10,000 BTU/H (2.9 Kilowatts) Min. Input when the rear burner is
turned off
n Propane at 36,000 BTU/H (10.5 Kilowatts) Max. Input, and
10,000 BTU/H (2.9 Kilowatts) Min. Input when the rear burner is
turned off
The Montigo warranty will be voided by, and Montigo disclaims any
responsibility for, the following actions:
n Modification of the fireplace and/or components including Direct-
Vent assembly or glass doors.
n Use of any component part not manufactured or approved by
Montigo in combination with this Montigo fireplace system.
n Installation other than as instructed in this manual.
Consult your local Gas Inspection Branch on installation
requirements for factory-built gas fireplaces. Installation & repairs
should be done by a qualified contractor.
Installations in Canada must conform to the current CAN/CGA B-
149.1 and .2 Gas Installation Code and local regulations. When the
unit employs the optional Blower Kit (part no. RFK1060), 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
Blower 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.
Page 2
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.
Part No. XG0120
Installation
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:
Ø 5" Inner
Ø 8" Outer
9 1/2
40 1/2
45 1/4
20 1/2
Figure 1. Fireplace dimensions.
Clearances
These clearances apply to all dimensions except the framed opening,
where the clearance to combustibles is 0". The MD44-DV clearances
to combustible materials are:
Top - Rear Vent* 10"
Top - Top Vent* 44"
Back 0"
Side 0"
Floor 0"
Mantle** 8"
* Clearance from the top of the fireplace to
a combustible ceiling within the fireplace
enclosure.
** Refer to page 10.
Framing
MD44-DV Direct Vent Vented Fireplace
**
**
45
44
* Rear Vent - 33"
Top Vent- 49 5/8"
** See Vent Termination Section
for framing of termination opening.
79 1/4
Figure 3. Corner framing dimensions.
When installing a shelf over the top of the fireplace, the following
guidelines must be adhered to: For Rear Vent models (MD44DR),
the minimum clearance from the top of the fireplace to a shelf is 10".
For Top Vent models (MD44DT), the normal minimum clearance is
44". However, if the horizontal vent run is 12" or less, then the top
clearance is reduced to 15 1/2". (Minimum 1" clearance must still be
maintained around the vent pipes.)
See Figure 4.
Header
Shelf
10" Min.
4" Min.
391/2
21 1/4
Rear Vent (MD44DR)
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.
*
55 1/2
Header
Shelf
15 1/2"
Min.
21 1/4
4" Min.
Max.
Top Vent (MD44DT)
16"
21*
44
Figure 2. Framing dimensions.
Part No. XG0120
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.
45
Page 3
MD44-DV Direct Vent Vented Fireplace
Installation
Installing The Gas Line
The gas line must be installed before finishing the D44DV 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 10.5" 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.
The appliance and its individual shutoff valve must be disconnected
1 1/4
Gasline access
3 1/8
Figure 5. Gas line access.
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.
9 1/4 x 2 5/8"
Vent Installation
This section covers the installation of direct venting and terminations.
Installation Requirements
n This fireplace use Premium Series (5"/8" dia.) Venting compo-
nents with:
n Minimum 1" clearance to combustibles required for vent pipes
n Use only certified Montigo vent components. (Use of other parts will
void the Montigo warranty, and may impede the operation of the
fireplace.)
n All joints must be secured with a minimum of two screws per joint
n Vent terminations must not be recessed in walls or siding
n Horizontal runs must be supported by a minimum of two supports
per horizontal run. A minimum of one screw on each side of
support is also required
n Flex vent sections may be stretched up to 50% of their total length
(eg. a 24" section may be stretched to 36")
n Maximum horizontal run for a flex section with no vertical rise is 3 feet.
n Flex vent sections over 3 feet must fall within the limits set by the
venting graph and must have a minimum vertical rise of 3 inches
per foot of flex.
n Solid vent sections may be cut less than half way from the tapered end
n Venting components can be used in any combination of solid/rigid
pipe or flex pipe and in any orientation (Male connectors can face
in any direction)
Vent Terminations
Selecting A Termination Location
Choosing your vent termination location will help to determine whether
you need to use a top vent or rear vent fireplace. Figure 6, below,
shows typical fireplace locations and the venting options they provide.
For a more detailed diagram of allowed termination locations, see
Appendix B.
Figure 6. Fireplace locations and vent terminations.
Installing The Remote Switch
The MD44-DV's gas valve, located behind the lower brass trim, may
be connected to a wall switch. The valve generates its own power on
a millivolt circuit. Use only low voltage wire, and DO NOT connect
any external power to it.
Refer to Figure 21 for wiring requirements.
Note: The switch location must not exceed 30' from the fireplace.
Page 4
Cautions:
n Vent terminations can be very hot. If the termination is less than
7 feet above a public walkway, it should be fitted with a certified
Montigo Heat Guard. (Part no. PTKOG)
n Do not obstruct, or attempt to conceal, the vent termination.
These actions will affect the operation of the fireplace, and may
be hazardous.
n In heavy snow areas, take extra care to prevent snow buildup
from obstructing the vent termination.
Part No. XG0120
Installation
MD44-DV Direct Vent Vented Fireplace
Installing Terminations with Built-In Frames
11
PTO-3F
11
1. Frame the termination opening to 11" x 11".
2. Fasten the termination to the studs using a minimum
of 4 screws.
Installing Terminations with MSR Frames
12
MSR
Installing Terminations with MOSR Frames
MOSR
1212
12
PTO-3
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.
Installing Heat Guards over Terminations
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
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.
Part No. XG0120
Page 5
MD44-DV Direct Vent Vented Fireplace
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.
n the maximum horizontal vent run for a Top Vented unit is 20 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. 9) 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 floor of the fireplace
is 11 ft. and the horizontal run to the wall flange of
the vent termination is 15 ft., this would be an
acceptable installation.
Example B: (Acceptable Installation)
If the vertical dimension from the floor of the fireplace
is 7 ft. and the horizontal run to the wall flange of the
vent termination is 10 ft., this would be an acceptable
installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace
is 4 ft. and the horizontal run to the wall flange of the
vent termination is 7 ft., this would NOT be an
acceptable installation.
20
15
Vertical
Height (feet)
10
Center of
Vent Pipe
Hearth
Figure 7. Venting Graph
5
Max. Horizontal Run
0
0
5 10 15 20
Horizontal Run (feet)
Top Vent
Installation Of Top Vent DV
The following venting components are available for the MD44-DV
Top Vent:
A - Termination PTO-3 (3" length)
PTO-3F (3" length)
B - Termination Frames MSR (stucco frame)
MOSR (stucco can)
BSR (brick can)
C - Solid section & elbow PIHR-6 (72" length)
PIHR-10 (120" length)
D - Flex sections PFL-1 (12" section)
PFL-2 (24" section)
PFL-3 (36" section)
PFL-4 (48" section)
E - Solid sections PXT-18 (18" f/f section)
PEXT-1 (12" m/f section)
PEXT-2 (24" m/f section)
PEXT-3 (36" m/f section)
PEXT-4 (48" m/f section)
PEXT-6 (72" m/f section)
F - Elbows
Example:
For our shortest venting configuration use components A
and F (see Figure 8).
Example:
A 10' section and elbow (PIHR-10) 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 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 must
not exceed maximum horizontal length of 3 feet. (see
Figure 12).
PEL-90M (m/m 90° elbow)
PEL-90F (f/f 90° elbow)
PEL-90FM (f/m 90° elbow)
Page 6
Part No. XG0120
Loading...