Montigo M38BV-ST User manual

See-Thru
B-Vented
Gas Fireplace
M38BV-
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 qualied installer,
service agency or the gas supplier.
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 re department.
For Your Safety:
Do not store or use
gasoline or other ammable
vapors and liquids in the
vicinity of this or any other
appliance.
Safety Notice:
Glass doors on gas replaces are
extremely hot while the replaces is on
and remain hot even after the replace
has been turned off. Safety screens
are available and can reduce the risks
of severe burns. Please keep children
away from the replace at all times.
®
C US
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.

Page 2
M38BV-ST B-Vented Fireplace
Introduction
The M38BV-ST is a See-Thru Gas Fireplace with glass doors on two
sides and an adjustable center burner. This fireplace is for use with
standard 4" B-Vent It is available in two models:
Model M38BV-ST (continuous pilot)
Model M38BV-ST-I (intermittent pilot)
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 M38BV-ST refers to both models. Sections which are
specific to a particular model are marked with a sym-
bol, plus the appropriate model number.
The M38BV-ST is rated for:
Natural Gas at 32,000 BTU/H (9.4 Kilowatts) Max. Input.
Propane at 32,000 BTU/H (9.4 Kilowatts) Max. 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 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 unit
employs fans and 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. This unit employs fans and must be
grounded in accordance with local codes or, in the absence of local
Table Of Contents
Introduction............................................................................... 2
Installation
Installing the Fireplace Shell .......................................... 3
Installing the Gasline...................................................... 4
The Remote Switch........................................................ 4
Vent Requirements......................................................... 4
Finishing around the fireplace
Facing .............................................................. 5
Mantels and Surrounds ..................................... 5
Installing the Logset ....................................................... 6
Wiring ........................................................................... 6
Removing and Installing the Door.................................. 7
Operation
Adjusting the Center Burner........................................... 7
Lighting Instructions - Model M38BV-ST........................ 8
Lighting Instructions - Model M38BV-ST-I...................... 9
Lighting Instructions - Model M38BV-ST ..................... 10
Maintenance
Cleaning....................................................................... 11
Gas Control Valve ........................................................ 11
Pilot Burner Adjustment................................................ 11
Troubleshooting ........................................................... 12
Warranty.................................................................................. 13
Appendices
A - Spare Parts............................................................. 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.

Page 3
M38BV-ST B-Vented Fireplace
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 B-Vent & Combustion Air Kit installation.
The fireplace dimensions are shown below:
Figure 1. Fireplace dimensions.
Installation
Figure 2b. Securing the fireplace to the framing.
Framing
Clearances
The M38BV-ST clearances to combustible materials are:
Top* 14"
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 5.
Top View
Front View
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.
41
Figure 2a. Framing dimensions.
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.
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.
17 1/8
41
40
38 1/4
C
C
17 1/8
Ø4" B-Vent

Page 4
M38BV-ST B-Vented Fireplace
Installing The Gas Line
The gas line must be installed before finishing the M38BV-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
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.
• Only use gas shut-off 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 M38BV-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 10.) 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.
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
B-Vent Installation
The M38BV-ST is certified for use with standard 4" B-Vent and
requires no B-Vent appliance connector. Simply attach the B-Vent to
the fireplace flue collar, and secure it using 1/4" sheet metal screws.
Do not penetrate the inner sleave of the B-Vent when tightening the
screws.
Refer to the current CAN/CGA B-149.1 and .2 or ANSI Z223.1-1988
Gas Installation Code for specific vent sizing.
1 3/4
2 3/8
1 3/4
77
•Test your B-Vent installation after completion to ensure that
no combustible by-products are spilling from the fireplace
opening. This draft test should be performed after a three(3)
minute warm up period. The manufacturer will not be respon-
sible for any installations with inadequate draw.
CAUTION:
Installation In
Bedrooms and Bedsitting Rooms:
This fireplace is supplied with a secondary limit switch -- an added
safety feature that prevents overheating. This switch will also shut the
fireplace down if the flue becomes blocked. Once the reason for the
shutdown has been cured, the pilot burner must be relit.

Page 5
M38BV-ST B-Vented 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 4a. Side wall clearances are 0".
Combustible surrounds may be installed with 0" clearance to the side
of the fireplace as shown in Figure 4b.
Fireplace Facing
When selecting the finish material for your fireplace, it is important
to remember the following: BRASS TRIMS MUST NOT BE OB-
STRUCTED IN ANY WAY - to do so restricts the air supply for
the control compartments and heat exchanger it also prevents
access for servicing controls.
The face of the fireplace may be painted to match the room decor,
provided you use a heat-resistant paint. Decorative facing must not
extend past the fireplace opening at all, because it will interfere with
the access to retainers for removal of glass door.
Installation
Mantels & Surrounds
NOTE: Mantel clearances shown are for fire hazard prevention.
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 nor-
mal 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 4b. Combustible surrounds.
Figure 4a. Combustible mantles and facings.
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Top of fireplace
14" min.
to combustibles
Combustible Facing
Combustible construction
allowed in shaded area.
6" min.
89101112 67 45 23 01
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.
Combustible construction
allowed in shaded area.
1 1/2" clearance to combustibles
(0" to standoffs on sides)

Page 6
M38BV-ST B-Vented Fireplace
Installation
Wiring
Figure 6b. Wiring schematic for fans.
Gas Control and Pilot Wiring
Figure 5. Wiring for the M38BV-ST-I with Honeywell gas control and
pilot.
Fans
The M38BV-ST is equipped with 4 fans for circulating heat into
the living space. Installations in Canada must be in accordance
with CSA C22.1 Canadian Electrical Code Part 1 and/or Local Codes.
Installations in the USA must be in accordance with local codes
or, in the absence of local codes, with the National Electrical Code,
ANSI/NFPA 70-1987.
NOTE: If any of the original wire supplied with the appli-
ance is replaced, it must be replaced with the same
type, or its equivalent.
Installing the Log Set
The M38BV-ST is supplied with five (5) fibre logs. To install, simply
place log "A's" rectangular shaped extension into the log mounting
slot located on rear wall of the burner assembly. Place log "B" onto
front log slots of the burner assembly. Place log "C" and log "D" onto
the mating positions as shown in Figure 7a below. When log set is
installed it should look like Figure 7b.
Figure 7b. Log Installation - Step 2.
Log 'A'
Log 'B'
Log 'C'
Log 'D'
Figure 7a. Log Installation - Step 1.
Log 'E'
WARNING:
If logs are not placed properly, excessive
sooting will result.
Figure 6a. Wiring for fans.
Fan motors
Fan motors
M38BV-ST-I
Honeywell (Q3450)
Pilot Assembly
Pilot Electrical
Harness Connector
Honeywell Gas
Control (SV9501M)
Gas Control
Connector Fuse
Limit
Switch Wall
Switch
Fan Plug
Receptacle
Junction Box
Junction Box Cover
White
Black
Green
40 VA
Transformer
115VAC
24VAC
Grnd Screw
115/1/60 Supply
GL1 L2
G
L1-WH
L2-BLK

Page 7
M38BV-ST B-Vented Fireplace
Installation
Removing and Installing the
Door
Removing the door surround:
The door surround is held in place by two metal clips at the top, and
one magnet on each side. To remove the surround, pull the bottom
outwards and lift upwards until the slots "A" are clear of tabs "B" in
the door. You may need to use a flat screwdriver to pull the door sur-
round outwards. (See figure 8a).
Figure 8a. Removing door surround.
Removing the door:
To install/remove the glass door simply attach/remove the four (4)
machine screws, align tabs at the bottom of the door with the slots
in the bottom door rail (See figure 8b). Ensure that a good seal is
maintained.
Figure 8b. Installing Glass Door.
Glass door
and frame
Door surround
Tab 'B'
Slot 'A'
Magnet
Pull bottom of door
surround outwards
and upwards.
Machine Screws
Door Rail Tabs
Operation
Lighting Instructions
See Pages 8-9.
Gas Control Knob
(Shown in "Pilot" postion.)
Burner Adjustment
The M38BV-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 26).
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 9. 'Hi-Lo' Adjustment on the M38BV-ST gas valve.
Note: M38BV-ST models (electronic ignition) do not feature
hi/lo adjustment.

Page 8
M38BV-ST B-Vented 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 M38BV-ST
3. Push in gas control knob slightly and turn clock-
wise to "Off". Do not force.
4. Replace trim.
1. Turn off remote switch.
2. Remove lower trim.
1. STOP! Read the safety information above on this
label.
2. Remove lower trims.
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 af-
ter several 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. Replace lower trim.
10.Turn on remote switch to ignite re.
Lighting Instructions:
with Continuous Pilot
M38BV-ST
Gas Control Knob
(Shown in "Pilot" postion.)

Page 9
M38BV-ST B-Vented 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. Remove lower trim.
Gas
Inlet
Gas Control Switch
Shown in "On" Position
3. Turn the switch on the gas control to "Off".
4. Replace trim.
1. STOP! Read the safety information above on
this label.
2. Remove lower trims.
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. Replace lower trim.
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 M38BV-ST-I
with Honeywell Intermittent Pilot
M38BV-ST-I

Page 10
M38BV-ST B-Vented Fireplace
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.
■If you cannot reach your gas supplier, call the Fire
Department.
A. This appliance is equipped with an ignition system that allows
for both continuous pilot operation as well as an electronic
ignition that lights the pilot burner automatically. Do not
attempt to light the pilot by hand.
B. BEFORE LIGHTING smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor.
1. Turn off remote switch.
2. Flip down the lower trim.
3. Turn the switch on the Control Module to "Continuous Pilot
Off".
4. Flip up the trim.
with American Flame Electronic Ignition
ADJ.
AUX Learn
Remote/Off
Continuous
Pilot
Off/On
S I
IPIPOWER
6VAC 200mA
AC ADAPTOR
Wall Switch (SWI)
Brown
Brown
Black
White
Green White
Orange
Pilot
Main
Manual
Hi/Lo
Main Gas InputMain Gas Output
White (Sensor)
Orange (Igniter)
Control
Module
Emergency
Battery
Power
(4 x AA)
Pilot Assembly
Red
Black
Red
Black
Optional
Lighting Instructions:
To Turn Off Gas To Appliance:
1. STOP! Read the safety information above on this label.
2. Flip down the lower trims.
3. If the switch on the control module is set to "Continuous Pilot
Off" then the pilot will light when the appliance is turned on
by the remote switch. When switched to "Continuous Pilot
On" then the control module will attempt to light the pilot until
it detects that the pilot has been successfully lit.
4. With the control module set to "Continuous Pilot Off" 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 control module to "Continuous
Pilot On" This will initiate the lighting of the pilot.
NOTE: This unit is equipped with an ignition system that lights
the pilot burner automatically. Do not attempt to light the
pilot by hand.
6. Turn on wall switch.
7. Flip up the lower trim.
8. If the fireplace does not operate, follow the instructions "To
Turn Off Gas To Appliance" and call your service technician
or gas supplier.
9. If you wish to operate the Fireplace without the Continous Pilot
simply turn the switch on the control module to "Continuous
Pilot Off" and follow instructions 6-8.
For Your Safety - READ BEFORE LIGHTING:
with American Flame Electronic Ignition
WARNING: If you do not follow these instructions exactly, a re or explosion may
result causing property damage, personal injury or loss of life.
Operation - Model M38BV-ST