Page 1
Super B-Vent Series
Natural Vent Gas Fireplace
Installation & Operating Instructions
Models:
BV4536, BV5142
WARNING
IF THE INFORMATION IN THESE INSTRUCTIONS
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAM-
AGE, PERSONAL INJURY OR LOSS OF LIFE.
— Do not store or use gasoline or other flam-
mable 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.
— Installation and service must be performed
by a qualified installer, service agency or
the gas supplier.
WARNING: Improper installation, adjustment,
alteration, services 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.
DUE TO HIGH TEMPERATURES, THE APPLIANCE SHOULD BE LOCATED OUT OF TRAFFIC AND AWAY FROM FURNITURE AND DRAPERIES.
CHILDREN AND ADULTS SHOULD BE ALERTED TO THE HAZARDS OF HIGH SURFACE
TEMPERATURE AND SHOULD STAY AWAY TO
AVOID BURNS OR CLOTHING IGNITION.
YOUNG CHILDREN SHOULD BE SUPERVISED
WHEN THEY ARE IN THE SAME ROOM AS THE
APPLIANCE.
CLOTHING OR OTHER FLAMMABLE MATERIAL SHOULD NOT BE PLACED ON OR NEAR
THE APPLIANCE.
KEEP THE ROOM AREA CLEAR AND FREE
FROM COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLE VAPORS AND
LIQUIDS.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
41D2001 2/09 Rev. 6
Page 2
BV4536, BV5142 Natural Vent Gas Fireplace
TABLE OF CONTENTS
Thank you and congratulations on your purchase of an MHSC Fireplace
Please read the Installation and Operation Instructions before using the appliance!
IMPORTANT: Read all instructions and warnings carefully before starting installation.
Failure to follow these instructions may result in a possible fire hazard and will void the warranty.
Important Safety Information ...........................3
Code Approval ...................................................3
Pre-Installation Information
High Elevations ...............................................5
Gas Specifications ..........................................5
Before You Install ............................................5
Fireplace Dimensions .....................................6
Fireplace Framing ...........................................7
Fireplace Location ...........................................8
Clearances .........................................................8
Wall and Ceiling Clearances ...........................8
Floor Clearances .............................................8
Clearances to Combustibles ...........................9
Installation Information ...................................10
Positioning the Fireplace ...............................10
Finishing Material ..........................................10
Vent Installation ...............................................11
Installation Precautions ................................. 11
Venting Configuration ....................................11
Vertical Venting - Straight Up ........................ 11
Vertical Venting w/Elbows .............................12
Install Vent Components ...............................12
Firestop Installation .......................................13
Vertical Termination .......................................14
Outside Air Kit .................................................15
Fireplace Installation .......................................16
Check Gas Type ............................................16
Installing Gas Piping to Fireplace/Burner Sys-
tem Location .................................................16
Check Gas Pressure........................................18
Electrical Installation.......................................19
Electrical Wiring ............................................19
Remote Wall Mounted Switch .......................19
Electronic Pilot Ignition Wiring ......................20
Optional DC Remote Systems ......................20
Final Installation ..............................................21
Wall Finishing ................................................21
Rock Wool Placement ...................................21
Lava Rock Placement ...................................21
Log Placement ..............................................21
Glass Bi-fold Door Installation .......................22
Damper Operation ........................................23
Hi-Temperature Cut-off Disc ..........................23
Operating Instructions ....................................24
What To Do If You Smell Gas ........................24
Lighting Pilot for the First Time .....................25
Lighting Instructions Millivolt .........................26
To Turn Off Gas .............................................26
Lighting Electronic Ignition ............................27
Cleaning and Maintenance .............................28
Burner, Pilot and Control Compartment ........28
Pilot Flame ....................................................28
Burner ...........................................................28
Burner Flame ................................................28
Vent System ..................................................29
Glass Door ....................................................29
Logs ..............................................................29
Rock Wool .....................................................29
Troubleshooting ..............................................30
Replacement Parts ..........................................33
Firebox Components .....................................33
Logs ..............................................................33
Standing Pilot - Millivolt Control ....................34
Electronic Ignition ..........................................34
Warranty ...........................................................35
2
41D2001
Page 3
IMPORTANT SAFETY INFORMATION
BV4536, BV5142 Natural Vent Gas Fireplace
INSTALLER
Please leave these instructions with the appliance.
OWNER
Please retain these instructions for future reference.
• Read this owner’s manual carefully and completely before trying to assemble,
operate, or service this fireplace.
• Any change to this fireplace or its controls can be dangerous.
• Improper installation or use of this fireplace can cause serious injury or death
WARNING
from fire, burns, explosions, electrical shock and carbon monoxide poisoning.
This fireplace is a decorative gas appliance. This fireplace must be properly installed by a qualified service
person.
CARBON MONOXIDE POISONING: Early signs of
carbon monoxide poisoning are similar to the flue with
headaches, dizziness and/or nausea. If you have these
signs, the fireplace may not have been installed properly.
Get fresh air at once! Have the fireplace inspected and
serviced by a qualified service person. Some people are
more affected by carbon monoxide than others. These
include pregnant women, people with heart or lung disease or anemia, those under the influence of alcohol,
and those at high altitudes.
Propane/LP gas and natural gas are both odorless. An
odor-making agent is added to each of these gases. The
odor helps you detect a gas leak. However, the odor
added to these gases can fade. Gas may be present
even though no odor exists.
Make certain you read and understand all warnings.
Keep this manual for reference. It is your guide to safe
and proper operation of this fireplace.
1. This appliance is only for use with the type of gas
indicated on the rating plate. This appliance is not
convertible for use with other gases unless a certified kit is used.
2. For propane/LP fireplace, do not place propane/LP
supply tank(s) inside any structure. Locate propane/
LP supply tank(s) outdoors. To prevent performance
problems, do not use propane/LP fuel tank of less
than 100 lbs. capacity.
3. If you smell gas:
• shut off gas supply
• 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-
bor’s phone. Follow the gas supplier’s instructions.
4. Never install the fireplace:
• in a recreational vehicle
• where curtains, furniture, clothing, or other flam-
mable objects are less than 42” from the front,
top or sides of the fireplace
• in high traffic areas
• in windy or drafty areas
5. This fireplace reaches high temperatures. Keep
children and adults away form hot surfaces to avoid
burns or clothing ignition. Fireplace will remain hot
for a time after shutdown. Allow surfaces to cool before touching.
6. Carefully supervise young children when they are in
the room with fireplace.
7. Do not modify fireplace under any circumstances.
Any parts removed for servicing must be replaced
prior to operating fireplace.
8. Turn fireplace off and allow to cool before servicing, installing or repairing. Only a qualified service
person should install, service or repair the fireplace.
Have burner system inspected annually by a qualified service person.
9. You must keep control compartments, burners and
circulating air passages clean. More frequent cleaning may be needed due to excessive lint and dust
form carpeting, bedding material, pet hair, etc. turn
off the gas valve and pilot light before cleaning fireplace.
10. Have venting system inspected annually by a qualified service person. If needed, have venting system
cleaned or repaired. Refer to Cleaning and Mainte-
nance, Page 32.
11. Keep the area around your fireplace clear of combustible materials, gasoline and other flammable vapor and liquids. Do not run fireplace where these are
used or stored. Do not place items such as clothing
or decorations on or around fireplace.
12. Do not use this fireplace to cook food or burn paper
or other objects.
13. Never place anything on top of fireplace.
41D2001
Continued on Page 4
3
Page 4
BV4536, BV5142 Natural Vent Gas Fireplace
IMPORTANT SAFETY INFORMATION
Continued on Page 4
14. Do not use any solid fuels (wood, coal, paper, cardboard, etc.) in this fireplace. Use only the gas type
indicated on rating plate.
15. This appliance, when installed, must be electrically
grounded in accordance with local codes or in the
absence of local codes, with the National Electri-
cal Code, ANSI/NFPA 70 or the Canadian Electrical
Code, CSA C22.1.
16. Do not obstruct the flow of combustion and ventilation air in any way. Provide adequate clearances
around air openings into the combustion chamber
along with adequate accessibility clearance for servicing and proper operation.
17. When the appliance is installed directly on carpeting,
tile or other combustible material other than wood
flooring, you must set appliance on a metal or wood
panel or hearth pad extending the full width and
depth of the appliance.
IMPORTANT:
PLEASE READ THE FOLLOWING CAREFULLY
It is normal for fireplaces fabricated of steel to give off
some expansion and/or contraction noises during the
start up or cool down cycle. Similar noises are found
with your furnace heat exchanger or car engine.
18. Do not use fireplace if any part has been exposed to
or has been under water. Immediately call a qualified service person to arrange for replacement of the
unit.
19. Do not operate fireplace if any log is broken.
20. Do not use a blower fireplace, heat exchanger fireplace or any other accessory not approved for use
with this fireplace.
21. The fireplace is not intended for use with a thermostat.
22. This appliance must be installed with draft hood in
same atmospheric pressure zone as the combustion
air inlet to the appliance.
23. For Massachusetts Residents Only: This product
must be installed by a licensed plumber or gas fitter
when installed within the Commonwealth of Massachusetts. Flexline installation must not exceed 36”.
IMPORTANT:
PLEASE READ THE FOLLOWING CAREFULLY
It is not unusual for gas fireplace to give off some odor
the first time it is burned. This is due to the manufacturing process.
Please ensure that your room is well ventilated
during burn off - open all windows.
It is recommended that you burn your fireplace for at
least en (10) hours the first time you use it.
Never connect unit to private
(non-utility) gas wells. This gas is
commonly known as wellhead gas.
WARNING
Proposition 65 Warning: Fuels listed in gas, wood burning or oil fired appliances, and the products
of combustion of such fuels, contain chemicals known to the State of California to cause cancer,
birth defects and other reproductive harm.
California Health and Safety Code Sec. 25249.6
WARNING
CODE APPROVAL
These appliances have been tested by CSA and found to comply with the established standards for VENTED GAS
FIREPACES in the US and Canada as follows:
LISTED VENTED GAS FIREPLACE
TESTED TO: ANSI Z21.50a-2008 CSA2.22a-2008
4
41D2001
Page 5
PRE-INSTALLATION INFORMATION
BV4536, BV5142 Natural Vent Gas Fireplace
HIGH ELEVATIONS
Input ratings are shown in BTU per hour and are certified without deration for elevations up to
4,500 feet (1,370 m) above sea level.
For elevations above 4,500 feet (1,370 m) in USA, installation must be in accordance with the current ANSI Z223.1/NFPA 54 and/or local codes having jurisdiction.
In Canada, please consult provincial and/or local authorities having jurisdiciton for installation at
elevations above 4,500 feet (1,370 m).
ORIFICE SIZES, PRESSURES AND BTUs
NATURAL GAS PROPANE GAS
Manifold Press: (w.c.) 3.5” Manifold Press: (w.c.) 10”
Maximum Supply Pressure 10.5” Maximum Supply Pressure 13”
Minimum Supply Pressure 4.0” Minimum Supply Pressure 11”
GAS SPECIFICATIONS
Max.
Gas Input
Model Fuel Control BTU/h
BV4536NV Natural Millivolt 50,000
BV4536PV Propane/LP Millivolt 50,000
BV4536NE Natural Electronic 50,000
BV4536PE Propane/LP Electronic 50,000
BV5142NV Natural Millivolt 50,000
BV5142PV Propane/LP Millivolt 50,000
BV5142NE Natural Electronic 50,000
BV5142PE Propane/LP Electronic 50,000
BEFORE YOU START
Read this homeowner manual thoroughly and follow all instructions carefully. Inspect all contents for
shipping damage and immediately inform your dealer if any damage is found. Do not install any unit
with damaged, incomplete, or substitute parts. Check your packing list to verify that all listed parts
have been received. You should have the following:
• Fireplace (Firebox and Burner System) • Rock Wool
• Log Set • Exterior outside air hood
• Lava Rock • Bifold glass doors in a separate package (LPG only)
ITEMS REQUIRED FOR INSTALLATION
Tools: Building Supplies:
• Phillips screwdriver • Framing materials
• Hammer • Wall finishing materials
• Saw and/or saber saw • Caulking material (noncombustible)
• Level • Fireplace surround material (noncombustible)
• Measuring tape • Piping complying with Local Codes
• Electric drill and bits • Tee joint
• Pliers • Pipe sealant approved for use with Propane/LP gas
• Square (resistant to sulfur compounds)
• Pipe Wrench • 4” Flexible liner or equivalent
41D2001
5
Page 6
BV4536, BV5142 Natural Vent Gas Fireplace
45”
36”
2256O”
3356O”
2356O”
116M
”
41”
26”
756O”
4456”
26”
756M”
51”
42”
2556O”
3956O”
2356O”
116M
”
41”
26”
756O”
4456”
26”
756M”
Figure 1 BV4536 Dimensions
FIREPLACE DIMENSIONS
Figure 2 BV5142 Dimensions
6
41D2001
Page 7
45”
Min.
A
A
E Min.
E Min.
A
A
B Min.
C Min.
D Min.
FIREPLACE FRAMING
BV4536, BV5142 Natural Vent Gas Fireplace
FIREPLACE FRAMING
Firebox framing can be built before or after the appliance is set in place. Construct firebox framing following Figure 3 and the chart below for your specific installation requirements. Refer to Page 6, Figures
1 & 2 for firebox dimensions. The framing headers may rest on the top of the firebox standoffs.
The firebox may be installed directly on a combustible floor or raised on a platform of an appropriate
height. When the firebox is installed directly on carpeting, tile or other combustible material, other than
wood flooring, the firebox shall be installed on a metal or wood panel extending the full width and depth
of the enclosure.
Do not fill spaces around firebox with
insulation or other materials. This
could cause a fire.
WARNING
BV4536 BV5142
A 45C\,” 51C\,”
B 80C\v” 86C\v”
C 57Z\v” 60C\,”
D 40C\,” 43C\,”
E 23B\,” 23B\,”
41D2001
Figure 3 Framing Dimensions
7
Page 8
BV4536, BV5142 Natural Vent Gas Fireplace
PRE-INSTALLATION INFORMATION
FIREPLACE LOCATION
Plan for the installation of your appliance. This includes determining where the unit is to be installed,
the vent configuration to be used, framing and finishing details, and whether any optional accessories (i.e. wall switch, or remote control) are desired. Consult your local building code agency to
ensure compliance with local codes, including permits and inspections.
The following factors should be taken into consideration:
• Clearance to side-wall, ceiling, woodwork and windows. Minimum clearances to combustibles
must be maintained.
• This fireplace may be installed along a wall, across a corner or use an exterior chase.
• Location should be out of high traffic areas and away form furniture and draperies due to heat
from appliance.
• Never obstruct the front opening of the fireplace.
• Do not install in the vicinity where gasoline or other flammable liquids may be stored.
• Vent pipe routing. Refer to Venting section found in this manual for allowable venting configura-
tions.
• These units can be installed in a bedroom. Refer to the National Fuel Gas Code ANSI Z233.1/
NFPA 54 - (current edition), the Uniform Mechanical Code - (current edition), and Local Building
Codes for specific installation requirements.
WALL and CEILING CLEARANCE REQUIREMENTS
Ensure that minimum clearances shown in Figure 4 are maintained. Left and right clearances are
determined when facing the front of the appliance. Follow these instructions carefully to ensure
safe installation. Failure to follow these requirements may create a fire hazard.
Sidewall Clearance: The clearance from the front edge of the appliance to any combustible wall
should not be less than 4” on both the left and right sides.
Ceiling Clearance: The ceiling must be at least 25” from the top of the front of the fireplace (66”
from the bottom of the fireplace).
Back-wall Clearance: The appliance may be placed against a combustible back wall. NOTE:
There are 1/4” ribs/spacers on the outer shell of the unit to maintain minimum clearance of the outer
shell to combustibles.
FLOOR CLEARANCES
The fireplace may be installed on a flat, hard combustible surface (i.e. flat wood, plywood or particle
board). Be sure the fireplace rests on a solid continuous floor or platform with appropriate framing
support. Do NOT install appliance directly on carpeting, vinyl or other soft floor covering. If the fireplace is to be installed on carpeting or tile, or on any combustible material other than wood flooring,
the fireplace should be installed on a metal or wood panel that extends the full width and depth of
the fireplace.
8
41D2001
Page 9
CLEARANCES
Combustible Mantel
Side Wall
12”
8”
12”
10”
1"
256O”
3"
4"
156O”
256O”
45°
BV4536, BV5142 Natural Vent Gas Fireplace
CLEARANCES TO COMBUSTIBLES
The appliance is a zero clearance fireplace with ribs/spacers defining the minimum space to the sheet
metal outer shell. Combustibles may be placed up against these spacers. Do NOT place combustibles
(i.e. insulation, wood, etc.) closer than allowed by the spacers or a fire hazard may exist. The ribs/spacers for the sides and rear of the appliance are 1/4” and the top spacers are 3Z\,”. On the front top edge in
front of the top framing spacers, a combustible wall (or drywall) may be brought up to the front top and
side edges of the unit. Do not overlap the black painted face with combustible materials. Figure 4
Follow these instructions carefully to ensure safe installation. Failure to follow
instructions exactly can create a fire hazard.
The appliance cannot be installed on a carpet, tile or other combustible material
other than wood flooring. If installed on carpet or vinyl flooring, the appliance
shall be installed on a metal, wood or noncombustible material panel extending
WARNING
full width and depth of the appliance.
Header
66” Minimum
Minimum 4”
From Both
Side Walls to
Opening
Figure 4 Clearances
12” Min.
12” Max.
Depth
FP2018
Standoff
FP2191
FP2249
Side of
Fireplace
Opening
Top of Fireplace
Opening
Side View
Combustible
Mantel Area
Wall
41D2001
Top View
Figure 5 Mantel Clearances
9
Page 10
BV4536, BV5142 Natural Vent Gas Fireplace
INSTALLATION INFORMATION
POSITIONING THE FIREPLACE
1. Bend out the four (4) nailing flanges located on the sides of the fireplace. For 5/8” drywall, use the
two (2) outer most flanges. For 1/2” drywall, use the two (2) inner flanges.
2. Slide the firebox into prepared framing or position fireplace in its final position and frame later. Be
sure fireplace is resting on a flat surface.
3. Set unit level and plumb by checking the top and front of unit. Shim side-to-side and front-to-back
as necessary.
4. Anchor nailing flanges of the fireplace to the side-framing members using 8d nails or other suitable
fasteners.
The fireplace must be installed giving
full consideration to the clearances and
height requirements identified in this
NOTE
manual.
FINISHING MATERIAL
Measure fireplace dimensions and verigy framing methods and wall covering
details before framing constructions begins.
Any remote wiring (i.e. remote control and wall
switch) must be done prior to final finishing to
avoid costly reconstruction.
NOTE
Only noncombustible materials (i.e. brick, tile, slate, steel or other materials with a UL fire rating of Zero)
may be used to cover the black surface of the appliance. A 300° F minimum adhesive may be used to
attach facing materials to the black surface. If joints between the finished wall and the fireplace surround are sealed, a 300° F minimum sealant material (General Electric RTV 103 or equivalent) must
be used.
Combustible
Finishing Material
Noncombustible Materials Only are Permitted to
Cover Black Face of Unit
High Temperature
Sealant is Permitted
at These Joints
10
FP2192
Figure 6 Finishing Material
41D2001
Page 11
VENT INSTALLATION
40’
Maximum
14’
Minimum
BV4536, BV5142 Natural Vent Gas Fireplace
The following venting instructions are
provided as a general guideline. Always
check with pipe manufacturer for venting
requirements.
WARNING
INSTALLATION PRECAUTIONS
Consult local building codes before beginning the installation. The installer must make sure to select
the proper vent system for installation. Before installing vent kit, the installer must read this fireplace
manual and vent kit instructions.
Only a qualified installer/service person should install venting system. The installer must follow these
safety rules:
• Wear gloves and safety glasses for protection.
• Use extreme caution when using ladders or when on rooftops.
• Be aware of electrical wiring locations in walls and ceilings.
The following actions will void the warranty on your venting system:
• Installation of any damaged venting component.
• Unauthorized modification of the venting system.
• Installation of any component part not manufactured or approved by MHSC.
• Installation other than permitted by these instructions.
VENTING CONFIGURATION
Never use 90° elbows.
WARNING
This natural vent fireplace has been tested to use 8” Class B-Vent pipe.
WARNING
VERTICAL VENTING STRAIGHT UP (NO ELBOWS)
Figure 7 Vertical Venting - Straight Up
41D2001
FP2193
11
Page 12
BV4536, BV5142 Natural Vent Gas Fireplace
A
B
VERTICAL VENTING WITH TWO (2)
45° ELBOWS
Figure 8 Vertical Venting with Two
(2) 45° Elbows
VENT INSTALLATION
Never use more than two (2) 45° elbows.
When using adjustable elbows, never
exceed 45°.
WARNING
NOTE: A and B must satisfy this
condition:
A + B < 40’ Maximum
A + B > 14’ Minimum
FP2194
INSTALL VENT COMPONENTS
1. Attach the first piece of vent piping (elbows or straight pipe)
to the pipe connector located above the fireplace. Secure
first section of pipe to damper collar with three (3) screws.
2. Continue to add vent components. Be certain that each
section is locked properly.
3. Where necessary, add support brackets. Figure 9. Incline
runs must be supported every 3’. Vertical runs must be supported every 8’, using wall straps. Slip wall straps loosely
on to pipe. Attach straps to framing members using nails or
screws. Tighten nut/bolt to secure pipe.
Always maintain minimum clearances
around vent systems. The minimum
clearances to combustibles is 1” around
vent pipe. For ceiling firestops and vertical sections of vent pipe a 1” minimum
clearance all around the pipe must be
maintained. Do not pack the open air
WARNING
spaces with insulation or other materials.
This could cause high temperatures and
may present a fire hazard.
Wall Studs
Wall Strap
Vent Pipe
FP2195
Figure 9 Install Pipe Supports
12
41D2001
Page 13
VENT INSTALLATION
BV4536, BV5142 Natural Vent Gas Fireplace
FIRESTOP INSTALLATION
A ceiling firestop must be installed if the vent passes through a ceiling. Refer to the instructions from
the pipe manufacturer. To position firestop refer to Figures 9 and 10. Only one (1) firestop required per
frame.
NOTE: A firestop is not required at the roof.
LOCATE and INSTALL FIRESTOP
1. For ceiling firestops, position a plumb bob over the center of the vertical pipe to spot a hole through
which the pipe will penetrate.
2. Drill a hole through this center point and check for obstructions (i.e. wiring or plumbing).
3. Reposition the fireplace and vent system, if necessary, to accommodate ceiling joists or obstructions.
4. Cut an 11” x 11” hole through the ceiling, using the center point.
5. Frame the hole with framing lumber the same size as the ceiling joists. Position firestop. If attic is
above, mount firestop on top of framing. Figure 10. If room is above, mount firestop on the bottom
of framing. Figure 11. Secure with nails or screws.
6. Run vent through firestop.
Nails
Joist
Nails
Firestop
Spacer
Joist
Figure 10 Install Firestop in Attic
FP2020
Firestop Spacer
Figure 11 Install Firestop in Ceiling
When installing in a chase, you should insulate the chase as you would the outside walls of your home. This is especially important in cold climates. Insulation
should be considered a combustible material. Maintain proper clearances to all
combustible materials.
NOTICE
Treatment of firestops and construction of the chase may vary from buiding type
to building type. These instructions are not substitutes for the requirements of
local building codes. You must follow all local building codes.
NOTICE
41D2001
13
Page 14
BV4536, BV5142 Natural Vent Gas Fireplace
H
X
12
VENT INSTALLATION
VERTICAL TERMINATION
Major building codes specify a minimum vent height above the rooftop depending on the pitch of the
roof. Refer to Figure 12 for minimum heights, provided the termination cap is at least 8’ from a vertical
wall and 2’ below a horizontal overhang. Trees, buildings, adjoining roof lines and adverse wind conditions may require taller chimneys than what is shown.
Listed Vertical
Termination
Cap
Lowest Discharge
Opening
Roof Pitch H Min. (ft)
Flat to 6/12 1’
6/12 to 7/12 1’3”
Listed Gas Vent
Over 7/12 to 8/12 1’6”
Over 8/12 to 9/12 2’
Over 9/12 to 10/12 2’6”
Roof Pitch is x/12
Over 10/12 to 11/12 3’3”
Over 11/12 to 12/12 4’
H (Min) - Minimum
Height from Roof to Lowest Discharge Opening
Over 12/12 to 14/12 5’
Over 14/12 to 16/12 6’
Over 16/12 to 18/12 7’
Over 18/12 to 20/12 7’6”
Over 20/12 to 21/12 8’
FP1022
NOTE: Vertical termination must be
at least 8’ from vertical wall.
Figure 12 Minimum Vent Height for Various Roof Pitches
LOCATE AND INSTALL VERTICAL TERMINATION
NOTE: When working on the foor, cover the opening of the installed vent pipe below to prevent debris
falling in.
1. Locate and mark the vent center point on the underside of the roof, and drive a nail trough the center
joint.
2. The size of the roof hole framing dimensions depends on the pitch of the roof.
3. Cut and frame the roof hole.
4. Continue to install vent sections through the roof hole until reaching the appropriate distance above
the roof.
5. Attach a flashing to the roof using nails, and use a non-hardening mastic around the edges of the
flashing base when it meets the roof.
6. Attach a storm collar over the flashing joint to form a watertight seal. Place non-hardening mastic
around the joint, between the storm collar and the vertical pipe.
7. Attach termination per pipe manufacturer’s instructions.
14
41D2001
Page 15
OUTSIDE AIR KIT
BV4536, BV5142 Natural Vent Gas Fireplace
To operate this appliance, the outside air
kit MUST be installed and operational.
Operation without the outside air kit may
result in high temperature on combustible materials and possible spillage of
WARNING
combustion product into the living area.
OUTSIDE AIR KIT INSTALLATION
1. Attach aluminum flexible hose to outside air door on the appliance, securing it with a spring
clamp.
2. Cut a hole through outside wall, place outside air hood in hole and secure with sealant.
3. Attach other end of flex hose to outside air hood, securing it with a spring clamp.
Outside Air Door
FP2196
Aluminum Flex
Hose
(not provided)
Spring Clamp
Figure 13 Outside Air Kit Installation
Spring Clamp
Outside Air Hood
41D2001
15
Page 16
BV4536, BV5142 Natural Vent Gas Fireplace
FIREPLACE INSTALLATION
CHECK GAS TYPE
Use proper gas type for the fireplace you are installing. If you have conflicting gas types, do not
install fireplace. See dealer where you purchased the fireplace for proper fireplace for your gas
type.
INSTALLING GAS PIPING TO FIREPLACE LOCATION
INSTALLATION ITEMS NEEDED
Before installing, make sure you have the items listed below:
• External regulator (supplied by installer) • Tee Joint
• Piping (check local codes) • Pipe wrench
• Sealant (resistant to propane/LP gas)
A qualified installer or service person
must connect appliance to gas supply.
Follow all local codes.
WARNING
• Test gauge connection*
• Sediment trap (optional but recommended)
• Approved flexible gas line with gas connector (if allowed by
local codes - not provided)
*A CSA design-certified equipment shutoff valve with 1/8”
NPT tap is an acceptable alternative to test gauge connection. Purchase the CSA design-certified equipment shutoff
valve from your dealer.
For propane/LP connections only, the installer must supply an external regulator. The external
regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between
11 and 13 inches of water. If you do not reduce incoming gas pressure, burner system regulator
damage could occur. Install external regulator with the vent pointing down as shown in Figure 14.
Pointing the vent down protects it from freezing rain or sleet.
For propane/LP units, never connect
fireplace directly to the propane/LP
supply. This burner system requires an
external regulator (not supplied). Install
the external regulator between the burn-
CAUTION
er system and propane/LP supply.
Use only new black iron or steel pipe. In-
External
Regulator
100 gal.
(min) Propane/LP
Supply
Tank
ternally tinned copper or copper tubing
can be used per National Fuel Code, section 2.6.3, providing gas meets hydrogen
sulfide limits, and where permitted by
local codes. Gas piping system must be
sized to provide minimum inlet pressure
CAUTION
(listed on data plate) at the maximum
Vent
Pointing
Down
flow rate (BTU/hr). Undue pressure loss
will occur if the pipe is too small.
External regulators may be necessary
for natural gas. One- or two-pound systems will damage this appliance and
FP1977
Figure 14 External Regulator with Vent Pointing Down (Propane/LP Only)
When using copper or flex connectors use only fittings approved for gas connections. The
gas control inlet is 3/8” NPT.
may cause fire hazard.
WARNING
16
41D2001
Page 17
FIREPLACE INSTALLATION
m
u
m
i
n
i
M
"
3
BV4536, BV5142 Natural Vent Gas Fireplace
Only persons licensed to work with gas
piping may make the necessary gas
connections to this appliance.
WARNING
NOTE: The gas line connection may be made using 1/2” rigid tubing or an approved flex connector. Since some municipalities have additional local codes, it is always best to consult your
local authorities and the current edition of the National Fuel Gas Code ANSI Z223.1/NFPA 54. In
Canada CSA-B149 (1 or 2) Installation Code.
A listed manual shut-off valve must be installed upstream of the appliance. Union tee and plugged 1/8”
NPT pressure tapping point should be installed upstream of the appliance. Figure 15
IMPORTANT: Install main gas valve (equipment shut-off valve) in an accessible locations. The main
gas valve is for turning on or shutting off the gas to the fireplace.
Check your building codes for any special requirements for
locating equipment shut-off valve to fireplaces.
Apply pipe joint sealant lightly to male threads. This will prevent excess sealant form going into pipe. Excess sealant in
pipe could result in clogged burner system valves.
We recommend that you install a sediment trap/drip leg in
supply line as shown in Figure 15. Locate sediment trap/drip
leg where it is within reach for cleaning. Install in piping system between fuel supply and burner system.
Locate sediment trap/drip leg where trapped matter is not likely to freeze. A sediment trap traps moisture and contaminants. This keeps them from going into the burner system gas controls. If sediment
trap/drip leg is not installed or is installed wrong, burner system may not run properly.
upstream of the appliance. Union tee and
plugged 1/8” NPT pressure tapping point
should be installed upstream of the ap-
CAUTION
pliance. Figure 15
Use pipe joint sealant that is resistant to
liquid petroleum (LP) gas.
CAUTION
A manual shut-off valve must be installed
Approved Flexible
Gas LIne
Sediment Trap/Drip Leg
41D2001
UL/CSA Design-Certified
Equipment Shut-off Valve
with 1/8” NPT Tap*
Natural Gas
From Gas Meter
Tee Joint
Pipe Nipple
Cap
Figure 15 Gas Connection
(4” w.c. to 10.5” w.c. Pressure)
Propane/LP
From External Regulator
(11” w.c. to 13” w.c. Pressure)
FP1978
17
Page 18
BV4536, BV5142 Natural Vent Gas Fireplace
CHECKING GAS PRESSURE
1. Check gas type. The gas supply must be the same as stated on the appliance’s rating decal. If
the gas supply is different from the fireplace, STOP! Do not install the appliance. Contact your
dealer immediately.
2. To ease installation, a 30” (762 mm) flex line with manual shut-off valve has been provided
with this appliance. Install and attach 1/2” gas line onto shut-off valve.
3. After completing gas line connection, purge air from gas line and test all gas joints from the
gas meter to the fireplace for leaks. Use a solution of 50/50 water and soap or a gas sniffer.
4. To adjust flame height, turn HI/LO knob to HI to get maximum pressure to burner. Turn HI/LO
knob to LO to get minimum pressure.
5. To check gas pressures at valve, turn captured screw counterclockwise 2 or 3 turns and then
place tubing to pressure gauge over test point. Turn unit to high. Figure 16. After taking pressure reading, be sure and turn captured screw clockwise firmly to reseal. Do not over torque.
Check test points for gas leaks.
Pressure
Test “IN”
Pressure Test
“OUT”
HI/LO Knob
Pilot Adjustment Screw
Do not use open flame to check for gas
leaks.
WARNING
FP1979
Figure 16 Gas Pressure Check at Gas Valve
18
41D2001
Page 19
ELECTRICAL INSTALLATION
Pilot Assembly
TH
TP
TH/TP
Thermodisc
Tan
Tan
1
2
2
2
Switch
3
4
ON
RS
OFF
Optional
Remote/Wall
Switch
ON
OFF
BV4536, BV5142 Natural Vent Gas Fireplace
ELECTRICAL WIRING
Electrical connections should only be performed by a qualified, licensed
electrician. Main power must be off when connecting to main electrical
power supply or performing service. All wiring shall be in compliance
with all local, city and state codes. The appliance, when installed, just be
electrically grounded in accordance with local codes, or in the absence
WARNING
of local codes, with the National Electrical Code ANSI/NFPA 70 (latest edition) and Canadian Electrical Code, CSA C22.1.
Label all wires before disconnecting
when servicing controls. Wiring errors
can cause improper and dangerous operation.
CAUTION
Verify proper operation after servicing.
REMOTE WALL MOUNTED SWITCH
A remote wall switch and up to fifteen (15) feet of 18 Ga. wire may be used with this appliance. Attach
the wall switch in a junction box at the desired location on the wall. Do not extend beyond the wall
switch wire length provided.
NOTE: Extended lengths of wire may cause the fireplace not to function properly. Longer length
of wire is permitted if the wire is made out of larger gauge (diameter) wire. Always check with
local codes.
Do not connect wall switch to AC
(110 V) circuit.
WARNING
41D2001
Figure 17 Electrical Wiring
19
Page 20
BV4536, BV5142 Natural Vent Gas Fireplace
ELECTRICAL INSTALLATION
ELECTRONIC PILOT IGNITION WIRING
Pilot must be lit and the valve control knob turned to the “ON” position. Meter leads must be connected to the TP and TH/TP terminals on the control valve.
• Turn RS-ON-OFF switch to the “ON” position.
• If meter is reading more than 175 millivolts and the main burner does not come on, then re-
place control valve.
• If meter is reading less than 175 millivolts, refer to Troubleshooting section of this manual to
determine the cause of the low reading.
• Turn RS-ON-OFF switch to the “RS” position and wall switch to “ON”.
• If meter is reading more than 175 millivolts and the main burner does not come on, then re-
place control valve.
• If meter is reading less than 175 millivolts, refer to Troubleshooting section of this manual to
determine the cause of the low reading.
Figure 18 Electronic Ignition System Wiring Diagram
REMOTE WALL SWITCH
Position the wall switch. Do not extend beyond the 15’ of wire.
OPTIONAL DC REMOTE SYSTEMS
These instructions replace the section entitled Hearth Mount
in the Millivolt hand held remote instructions supplied with the
remote.
1. Plug in remote connector wire to remote receiver.
2. Connect the wire terminal from the remote receiver. This
replaces the 15’ wall switch connection to the switch. Fig-
ure 18
3. Mount remote control receiver at junction box (for your wall
switch).
20
Remote receiver must be mounted outside the appliance due to high temperatures inside the chamber. This will pre-
NOTE
vent failures and longer battery life.
Do not connect 110-120V AC to the Remote Wall Switch. The appliance will
malfunction or destroyed.
WARNING
41D2001
FP2027
Page 21
FINAL INSTALLATION
BV4536, BV5142 Natural Vent Gas Fireplace
WALL FINISHING
Combustible Materials: Materials made of, or surfaced with wood, compressed paper, plant fibers or
other materials that are capable of being ignited and burned. Such materials are considered combus-
tible even though flame proof, fire retardant, treated or plastered.
Noncombustible Materials: Materials which will not ignite and burn. Such materials are those consist-
ing entirely of steel, iron, brick, tile, concrete, slate, glass, marble or combinations thereof, or have a
UL Fire rating of Zero (0).
High Temperature Sealant Material: Sealant that will withstand high temperatures; General Electric
RTV103 or equivalent.
FINISHING THE FIREPLACE FLUSH WITH A WALL
When finishing the face of the fireplace, combustible material may be brought up to the side or top edge
of the fireplace, but must never overlap the black metal face. The black metal face may be covered
with noncombustible material only. After applying the finishing material, a noncombustible sealant, 1/8”
minimum, should be used to close off any gaps at the top and sides between the fireplace and the
finishing to prevent cold air leaks. Refer to Page 10, Figure 6, for allowable locations for combustible
materials.
ROCK WOOL PLACEMENT
Rock wool should be evenly covering the burner from front to back. The rock wool should be separated
into chunks about the size of a nickel. The bag supplied has an excess of rock wool. The remaining
may be sued as filler over time.
LAVA ROCK PLACEMENT
Sprinkle a thin layer of lava rock on the floor of the inner chamber. Do not pile up in any area. It should
be placed in a single layer only around but not on any portion of the burner.
Do not sprinkle the lava rock or ember
chunks on top of the burner. This may
cause potential sooting, glass breakage
and a fire hazard.
WARNING
LOG PLACEMENT
VDY24/18D3R
1. Align pins on bottom of Rear Log #1 with pins on grate bar and
place on grate.
2. Place Front Left Log #2 on left front of grate bar aligning cutout
in bottom of log with grate bar.
3. Place Front Right Log #3 on right front side of grate bar aligning cutout in bottom of log with grate bar. Make sure Log #3
touches Log #1.
4. Place back end of Top Middle Log #4 on Log #1. Press the side
of Log #4 up against raised area of Log #1. Align notch in front
end of Log #4 with grate bar.
5. Rest Top Right Log #5 on Log #3.
6. Align Top Left Log #6 with notches on Log #2 and Log #4.
Top Left Log
#6
Notch
Front Left Log
#2
Notch
Cutout for
Grate Bar
Figure 19 Log Placement
Top Middle Log
#4
LG603
Top Right Log
#5
Front Right Log
#3
Cutout for
Grate Bar
Rear Log
#1
41D2001
21
Page 22
BV4536, BV5142 Natural Vent Gas Fireplace
FINAL INSTALLATION
GLASS BI-FOLD DOOR INSTALLATION
1. Remove and discard the two (2) screws that secure the C-Channel below the top opening of the
fireplace.
2. Attach bottom rail to unit with two (2) sheet metal screws. Figure 20
3. Attach top rail to unit with two (2) sheet metal screws. Figure 20
4. Place bottom metal door pin in bottom spring latch. Rotate top of door into top spring latch. Figure
21. Repeat Step 3 for other door.
Glass doors must be installed on all Propane/LP units and operated
in the closed position to eliminate any potential for soot spillage into
the room.
When installing a natural gas unit with glass door option, the unit
must be operated with glass doors completely opened or completely
WARNING
closed.
Top Rail
Sheet Metal
Screws
Bottom Rail
Top Spring
Latch
FP2198
Figure 20 Door Rail Installation
Bottom Spring
Latch
NOTE: Follow instructions located inside package.
22
FP2199
Figure 21 Glass Door Installation
41D2001
Page 23
FINAL INSTALLATION
CLOSED
OPEN
BV4536, BV5142 Natural Vent Gas Fireplace
DAMPER OPERATION
1. When damper lever is all the way to the left and locked into position, the damper
system is closed. Figure 22
2. Pull damper lever forward and unlock from closed position by swinging damper
lever to the right. Figure 22
3. Swing damper lever to the right, forcing into the locked position, to open damper
system. Figure 22
NOTE: Remove damper instruction tag before operating the unit.
Damper Lever
FP2200
Figure 22 Damper Operation
For Massachusetts Residents Only: Installation of this vented gas fireplace in the
Commonwealth of Massachusetts requires
the damper to be permanently removed or
welded into the fully open position. In addi-
NOTE
tion, a naturally vented gas fireplace may
not be installed in a bedroom or bathroom in
the Commonwealth of Massachusetts.
Damper must be in open position when appliance main burner is
operating. The damper system must be LOCKED into the OPEN
position during operation. If damper is not open, the appliance will
shut down at the pilot. Refer to Lighting Instructions if this occurs.
If damper system is not locked into the open position, the appliance may cause some spillage into the living area before the tem-
WARNING
perature switch can shut the pilot off.
Do not install a damper device to the appliance. Only use damper
device that comes with the unit.
HI-TEMPERATURE CUT OFF DISC
This unit is equipped with a shut off disc that helps prevent spillage due to a down draft. It also
helps prevent operation of the unit with damper closed. The Hi Temp switch is located on the
upper left corner of the fireplace opening. DO NOT OPERATE THE FIREPLACE WITH THE
SWITCH BYPASSED.
41D2001
23
Page 24
BV4536, BV5142 Natural Vent Gas Fireplace
OPERATING INSTRUCTIONS
BEFORE LIGHTING THE FIREPLACE
• Read the IMPORTANT SAFETY INFORMATION section at the beginning of this manual.
• Before lighting, check the fireplace for possible gas leaks.
• Before lighting, check for possible obstructions that could be blocking the vent termination or the
front louver.
• Any component that is found to be faulty must be replaced with an approved component. Tampering with the fireplace components is dangerous and voids all warranties.
• A small amount of air may be present in the gas line. It will take a few minutes for the lines to
purge. Once the purging is complete, the fireplace will light and will operate normally.
• During the initial purging, never allow the gas valve control knob to remain depressed in the pilot
position without pushing the ignitor button once every second.
• Subsequent lighting of the fireplace will not require this purging of air from the gas lines, unless
the gas valve has been shut-off for a long period.
LIGHTING THE FIREPLACE
You may notice the following:
• A slight odor
During manufacturing, fabricating and shipping, various components of this fireplace are treated
with certain oils, film or bonding agents. These chemicals are not harmful but may produce
annoying smoke and smells as they are burned off during the initial operation of the fireplace.
Operate the appliance 2 to 3 hours at the highest setting to burn off all the oils, films, etc.
• Fogging on bi-fold door glass
For the first few minutes after each lighting, vapor may condense and fog the glass. This con-
densation will disappear in a few minutes.
• Noise from the fireplace
This is due to metal expanding and contracting as it heats up and cools down, similar to the
sound produced by a furnace or heating duct.
• Flame appearance
It will take about 15 to 30 minutes for the flames to turn yellow and some portions of the logs to
glow.
24
41D2001
Page 25
OPERATING INSTRUCTIONS
BV4536, BV5142 Natural Vent Gas Fireplace
FOR YOUR SAFETY READ BEFORE LIGHTING
If you do not follow these instructions
exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
WARNING
A. This appliance is equipped with a pilot which must be lit with an ignitor while following these instructions exactly.
B. BEFORE OPERATING 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.
WHAT TO DO IF YOU SMELL GAS:
• Turn off all gas to the appliance.
• Open windows.
• Do not attempt to light any appliance.
• Do not touch any electric 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.
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 qualified service technician. Force or attempted repair may result in a fire or
explosion.
D. Do not use this appliance if any part of it has been under water. Immediately call a qualified service technician
to inspect the appliance and to replace any pat of the control system and any gas control that has been under
water.
LIGHTING PILOT FOR THE FIRST TIME
INITIAL LIGHTING
Purge air from the supply line as follows:
• Open main shut-off valve.
• Unscrew main pressure test point.
• Leave inlet test screw open until gas comes in.
• When gas is flowing, tighten inlet screw immediately.
LEAK TESTING
1. Follow the pipe from the gas supply line connection to the gas valve. Check connection for leaks with soap and
water mixture.
2. Next check for gas leaks at the burner with soap and water mixture.
3. Check the pilot for gas leaks with soap and water mixture.
Never use an open flame to check for
gas leaks.
WARNING
41D2001
25
Page 26
BV4536, BV5142 Natural Vent Gas Fireplace
ON
PILOT
OFF
LIGHTING INSTRUCTIONS MILLIVOLT
OPERATING INSTRUCTIONS
1. STOP! Read the safety information before proceeding.
2. Open access door on left side of floor to reveal gas
valve. Locate RS-OFF-ON rocker switch on left
side inner chamber.
3. Turn RS-OFF-ON rocker switch to “OFF”. Turn remote switch to “OFF”.
4. Push in gas valve knob and turn clockwise to
“OFF”.
5. Wait five (5) minutes to clear out any gas. Smell
for gas, including near the floor. If you smell gas,
STOP! Follow B in the safety information. If you
don’t smell gas, go to the next step.
6. Find the pilot located under the log.
7. Turn the gas valve counterclockwise to “Pilot”.
8. With the control knob pushed in, push in and release the piezo ignitor button to light the pilot.
9. Continue pushing the control knob in for a further
60 seconds to prevent the flame detector from
shutting off the gas while the probe is warming up.
Release the control knob.
10. • If the pilot will not stay lit after several tries, turn
the gas control knob clockwise to “OFF” and
call a service technician or gas supplier.
• If the knob does not pop out when released, stop
and call a service technician or gas supplier.
11. Turn knob counterclockwise to “ON”.
12. After the pilot has been lit for one minute, the burner can be turned on. Turn RS-OFF-ON switch to
“ON” or turn RS-OFF-ON switch to “RS” and remote switch to “ON”.
TO TURN OFF GAS
1. Turn RS-OFF-ON rocker switch to “OFF”.
2. Turn off all electric power to the appliance if service is to be performed.
3. Close lower door.
26
41D2001
Page 27
OPERATING INSTRUCTIONS
O
N
O
F
F
PILOT
LO
HI
BV4536, BV5142 Natural Vent Gas Fireplace
FOR YOUR SAFETY READ BEFORE LIGHTING
If you do not follow these instructions
exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
WARNING
A. This appliance is equipped with an ignition device (Piezo) which automatically lights the pilot. Do NOT try to light
the burner by hand.
B. BEFORE OPERATING 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.
WHAT TO DO IF YOU SMELL GAS:
• Turn off all gas to the appliance.
• Open windows.
• Do not attempt to light any appliance.
• Do not touch any electric 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.
C. Turn off all electric power to the appliance.
D. Do not use this appliance if any part of it has been under water. Immediately call a qualified service technician
to inspect the appliance and to replace any pat of the control system and any gas control that has been under
water.
LIGHTING ELECTRONIC IGN
1. STOP! Read the safety information above.
2. Turn switch to “OFF” position.
3. Turn off all electric power to the appliance.
4. This appliance is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.
5. Wait 5 minutes to clear out any gas. Then smell for gas, including
near the floor. If you smell gas STOP! Follow “B” above. If you do
not smell gas, go to the next step.
6. Turn on all electric power to appliance.
7. Turn RS-OFF-ON rocker switch to “ON”.
8. If the appliance will not operate, follow the instructions To Turn Off Gas and call your service
technician or gas supplier.
41D2001
27
Page 28
BV4536, BV5142 Natural Vent Gas Fireplace
Turn off gas before servicing fireplace. It
is recommended that a qualified service
technician perform these check-ups at
the beginning of each heating season.
WARNING
BURNER, PILOT AND CONTROL COMPARTMENT
Keep the control compartment, logs and burner areas surrounding the logs
clean by vacuuming or brushing at least twice a year. Make sure the burner
porting, pilot air opening and burner air openings are free of obstructions at
all times.
PILOT FLAME
The flames from the pilot should be visually checked as soon as the heater is
installed and periodically during normal operation. The pilot flame must always
be present when the fireplace is in operation. Figure 23. The pilot flame has
three distinct flames, one engulfing the thermopile, one engulfing the thermocouple and the other reaching to the main burner.
BURNER
Inspect area around the injector. Remove any lint or foreign material with a
brush or vacuum.
CLEANING and MAINTENANCE
Thermocouple
Thermopile
Figure 23 Pilot Flame
FP2030
BURNER FLAME
The flames from the burner should be visually checked as soon as the heater is installed and periodically during normal operation. In normal operation, at full rate, and after operating for about 15
to 30 minutes, the flame should be yellow and slightly taller than the rear log. Figure 24
NOTE: The type of installation, vent system configuration and wind effects may cause the flame
patterns to vary.
Figure 24 Burner Flame Appearance
28
LG637
41D2001
Page 29
CLEANING and MAINTENANCE
BV4536, BV5142 Natural Vent Gas Fireplace
VENT SYSTEM
The fireplace and venting system should be inspected before initial use and at least annually by a qualified field service person. Inspect the external vent cap on a regular basis to make sure that no debris is
interfering with the airflow. Inspect entire venting system to ensure proper function.
GLASS DOOR
Periodically clean the glass door as necessary. You should thoroughly clean the inside of the glass door
after using the fireplace for the second or third time.
When cleaning the glass, remember:
WARNING: Never use abrasive cleaners or clean when hot. Allow glass to cool before removal. Figure
25
Keep children and pets a safe distance away.
Never operate the fireplace without glass door properly secured.
Never operate the fireplace if the glass is broken.
CAUTION: Replace any glass that is chipped, cracked or broken. Replacement glass door assemblies
nust be supplied by MHSC.
WARNING: No substitute materials may be used.
WARNING: Handle glass door with care to avoid striking or slamming shut.
Push Up on Top
Hinge to Remove
Door Post From
the Hinge
Tilt Door to the Center
of the Opening
Lift Up on Door
to Remove From
Bottom Hinge
FP2203
Figure 25 Door Removal
LOGS
Leave logs installed in the fireplace for cleaning. Vacuum surface of the logs with a brush attachment. If
logs must be removed for cleaning, handle carefully by holding gently at each end. Gloves are recommended to prevent skin irritation from ceramic fibers. If skin becomes irritated, wash gently with soap
and water. Vacuum surface of logs with brush attachment or brush logs with a soft bristle brush (i.e.
clean, dry paintbrush). To place logs back in the fireplace, refer to “Log Placement”.
NOTE: Do not use cleaning fluid to clean logs.
ROCK WOOL
Replace or add rock wool as required following installation instructions in the Final Installation section
of this manual.
41D2001
29
Page 30
BV4536, BV5142 Natural Vent Gas Fireplace
STANDING PILOT IGNITION
TROUBLESHOOTING
SYMPTOM
1. Spark igniter
will not light pilot after repeated triggering of
piezo.
2. Pilot will not
stay lit after
carefully following lighting
instructions.
3. Pilot burning,
valve knob
tuned to “ON”,
switch is turned
to “ON” or “RS”,
but burner will
not ignite.
POSSIBLE CAUSE
A. Wire disonnected.
B. Defective igniter.
C. No gas or low gas
pressure.
D. No Propane/LPG in
tank.
A. Defective thermocou-
ple.
B. Defective valve.
A. Defective switch, wall
switch, remote control
or wire.
B. Pilot flame too small.
C. Defective or malfunc-
tioning thermopile.
D. Defective valve.
ACTION
A. Open door and check to make sure wire is connected to
igniter.
B. Check for spark at electrode and pilot. If no spark and elec-
trode wire is properly connected, replace pilot assembly.
C. Check remote/manual shut-off valve from fireplace. Low
pressure can be caused by bent lines, restricted lines, low
pressure line pressure. Consult with plumber or gas supplier.
D. Check Propane/LPG tank. Refill tank.
A. Check that thermocouple flame impinges on thermocouple.
Clean and/or adjust pilot for maximum flame impingement.
Ensure that the thermocouple connection at the gas valve is
fully inserted and tight.
Disconnect the thermocouple from the valve, place one mil-
livolt lead wire on the tip of the thermocouple and the other
meter lead wire on the thermocouple copper lead. Start the
pilot and hold the valve knob in. If the millivolt reading is less
than 15m V, replace pilot assembly.
B. If thermocouple is producing more than 15m V, replace faulty
valve.
A. Check switch and wire for proper connection. Place jumper
wires across terminals of switch. If burner comes on, replace
defective switch. If the switch is OK, repeat the same procedure on remote control. If burner comes on, replace remote
control. Place jumper wire across wire at gas valves (terminals marked TH and TP/TH). If burner comes on, wires are
faulty or connections are bad. Replace wire.
B. If pilot flame is not close enough to the thermopile, adjust
pilot flame.
C. Check thermopile wire connections to make sure all are tight
and that the thermopile is fully inserted into pilot assembly.
Check thermopile with a millivolt meter. Connect leads to TP
and TP/TH terminals on the control valve. If meter reading is
below 325m V, replace pilot assembly.
D. Turn valve knob to “ON” and switch to “ON”. Take a reading
at the thermopile leads (TP & TP/TH) on the valve. If the meter reads greater than 175m V and the burner does not light,
replace defective valve.
4. Frequent pilot
outage problem.
5. The pilot and
main burner
extinguish while
in operation.
30
A. Pilot flame may be too
high or too low, causing pilot safety to drop
out.
A. Inner vent pipe leaking
exhaust gases back
into system.
B. Horizontal vent improp-
erly pitched.
C. Improper vent cap
installation.
A. Clean and adjust the pilot flame for maximum flame impinge-
ment on thermocouple.
A. Check for flue product leak. Replace defective pipe section.
B. Check horizontal-vent piping is running upward 1/4” per foot.
Do not run the pipe level or downward.
C. Check for proper installation and freedom from debris or
blockage.
41D2001
Page 31
TROUBLESHOOTING
START
1. Turn gas supply off.
2. Turn ON/OFF switch to “ON”
Power to module (24V Normal)
YES
Is there a spark across
ignitor sensor gap?
YES
Turn on gas.
Does pilot burner light?
YES
Does spark stop when pilot is lit?
YES
Does main burner light?
YES
Does system run until ON/OFF switch
is in “OFF” position?
YES
END OF TROUBLESHOOTING
Check: Line voltage (120VAC)
Low voltage transformer (19.5 minimum VAC)
ON/OFF switch
Wiring connections
Unplug ignition lead and
check spark at module
(24VAC normal).
Is spark OK?
NO
YES
A. Check ignition cable ground wiring, ceramic insulator and gap.
Correct if necessary.
B. Does ignition cable show signs of melting or buckling?
Take protective action to shield cable and boot from
excessive temperatures.
A. Are all manual gas valves open?
Are supply tubing and pressure good?
Are pilot burner orifies blocked?
B. Check electrical connections between module and pilot
operator on gas control.
C. Check for 24VAC across PV-MVPV terminals.
If voltage is correct, replace gas control.
If voltage is not correct, replace module.
NOTE: If Module goes into lockout, reset system.
A. Check continuity of ignition cable and ground wire.
B. Clean flame rod.
C. Check electrical connections between flame rod and module.
D. Is ceramic flame rod insulator cracked?
E. Is pilot flame a steady blue? Does flame cover flame rod?
If not, adjust pilot flame. Replace module if problem persists.
A. Check for 24VAC across MV-MVPV terminal.
Replace module if there is no voltage.
B. Are electrical connections between module and gas
control good?
If connections are good, replace gas control or gas
control operator.
NOTE: If Module goes into lockout, reset system.
A. Check continuity of ignition cable and ground wire.
NOTE: If ground is poor or erratic, shutdown may
occasionally occur even though operation is normal at
time of checkout.
B. Is pilot flame a steady blue? Does flame cover flame rod?
NO
NO
NO
NO
NO
NO
Replace module
If above checks out, replace module
ELECTRONIC IGNITION
BV4536, BV5142 Natural Vent Gas Fireplace
41D2001
31
Page 32
BV4536, BV5142 Natural Vent Gas Fireplace
GENERAL TROUBLESHOOTING
TROUBLESHOOTING
SYMPTOM
1. Glass soots.
2. Poor draft due
to venting.
POSSIBLE CAUSE
A. Flame impingement on
logs.
A. Too much offset.
B. Too many elbows.
C. Vent height too short.
D. Vent too close to roof
line.
E. Blockage is rstricting
venting capacity.
F. Incorrect vent type.
G. Venting has been con-
structed with too large
or too small vent.
H. More than one appli-
ance is using one vent-
ing system.
ACTION
A. Install log set per instructions.
Inspect the injector and air intake area.
Make sure this area does not have any blockage from debris
and clean.
Check gas supply.
A. Reduce offset and/or raise termination.
If thermocouple is producing more than 15m B, replace faulty
valve.
B. Reduce number of elbows.
C. Raise vent.
D. Raise vent.
E. Remove blockage.
F. Replace with proper B-vent.
G. Replace with proper size.
H. Construct a single venting system for each appliance.
3. Poor draft due
to termination
cap.
4. Poor draft due
to ext. environment.
5. Poor draft due
to internal environment.
6. Unit shuts down
prematurely.
A. Cap obstructed by a
decorative enclosure.
B. Cap is crushed,
damged or missing.
A. Buildings, trees, roof
lines interfering with
venting.
B. Wind
C. Vent exposed to cold
chase.
D. Vent exposed to cold
weather.
A. Negative air pressure.
A. Blockage or restriction
in venting.
A. Remove or open enclosure or raise cap above it.
B. Replace cap.
A. Maintain proper clearances and heights to external obstruc-
tions; Be aware of overhangs.
B. Use cap designed for high winds; raise venting height.
C. Insulate chase.
D. Enclose vent within home.
A. To test for negative air pressure, open a window in the room
with the fireplace to see if the unit starts drafting correctly.
Make sure the damper system is in the open position.
A. Check for and remove blockage and light pilot following light-
ing instructions.
32
41D2001
Page 33
REPLACEMENT PARTS
1
2
3
4
5
6
1
2b
3
4
5
6,7,8
2a
2c
9
BV4536, BV5142 Natural Vent Gas Fireplace
Firebox Components,
Standard and Accessories
Ref. Description Qty. BV4536 BV5142
1. Hi Temperature Limit Switch 1 41D0202 41D0202
2. Firebrick Walls (T Brown) 1 Set FB4536W9TB FB5142W9TB
2a. Firebrick Center 1 41D2015 41D2016
2b. Firebrick Left Side 1 41D2013 41D2013
2c. Firebrick Right Side 1 41D2014 41D2014
3. Pull Screen 1 MS MS
4. Bi-fold Brass/Black Door 1 BBD4536/BLD4536 BBD5142/BLD5142
5. Manual Remote Control 1 RCM/RCB RCM/RCB
6. Embers 1 EMBERS EMBERS
7. Cinders 1 CINDERS CINDERS
8. Lava Rock 1 VR1000A VR1000A
9. Wall Switch Kit 1 MVWS MVWS
Log Components
41D2001
Ref. Description BV4536 BV5142
1. Rear Log 32D2118 32D2118
2. Front Left Log 32D2117 32D2117
3. Front Right Log 32D2116 32D2116
4. Top Middle Log 32D2114 32D2114
5. Top Right Log 32D2113 32D2113
6. Top Left Log 32D2115 32D2115
33
Page 34
BV4536, BV5142 Natural Vent Gas Fireplace
1
2
3
4
5
6
7
8
9
10
11
12
REPLACEMENT PARTS
Engine Components
Standing Pilot - Millivolt Control
Ref. Description Qty. BV4536NV BV4536PV BV5142NV BV5142PV
1. Gas Valve Assembly 1 26D0506 26D0507 26D0506 26D0507
2. Pilot Assembly 1 41D0327 41D0328 41D0327 41D0328
3. Burner Tube 1 41D0031K 41D0031K 41D0031K 41D0031K
4. Flexhose w/Shutoff Valve 1 23D6046 23D6046 23D6046 23D6046
5. Rocker Switch 1 41D0048 41D0048 41D0048 41D0048
6. Piezo Igniter 1 14D0503 14D0503 14D0503 14D0503
7. Injector 1 32D0100 32D0118 32D0100 32D0118
8. Burner Assembly 1 41D0500K 41D0501K 41D0500K 41D0501K
9. Wire Assembly 1 41D0201 41D0201 41D0201 41D0201
10. Grate Weld Assembly 1 41D1001K 41D1001K 41D1001K 41D1001K
Conversion Kits (not shown)
Conversion NG to LP 1 SNPK3642 -- SNPK3642 - Conversion LP to NG 1 -- SPNK3642 -- SPNK3642
Electronic Ignition Control
Ref. Description Qty. BV4536NE BV4536PE BV5142NE BV5142PE
1. Gas Valve Assembly 1 37D0016 37D0017 37D0016 37D0017
2. Pilot Assembly 1 54D2004 54D2005 54D2004 54D2005
3. Burner Tube 1 41D0031K 41D0031K 41D0031K 41D0031K
4. Flexhose w/Shutoff Valve 1 23D6046 23D6046 23D6046 23D6046
5. Rocker Switch 1 41D0048 41D0048 41D0048 41D0048
6. Piezo Igniter n/a -- -- -- --
7. Injector 1 32D0100 32D0018 32D0100 32D0118
8. Burner Assembly 1 41D0500K 41D0501K 41D0500K 41D0501K
9. Wire Assembly 1 54D2007 54D2007 54D2007 54D2007
10. Grate Weld Assembly 1 41D1001K 41D1001K 41D1001K 41D1001K
11. Ignition Module 1 37D0325 37D0325 37D0325 37D0325
12. Transformer 1 37D0027 37D0027 37D0027 37D0027
Conversion Kits (not shown)
Conversion NG to LP 1 SNPK3642E -- SNPK3642E - Conversion LP to NG 1 -- SNPK3642E -- SNPK3642E
34
41D2001
Page 35
BV4536, BV5142 Natural Vent Gas Fireplace
LIMITED LIFETIME WARRANTY POLICY
LIFETIME WARRANTY
The following components are warranted for life to the original owner, subject to proof of purchase; Firebox, Combustion Chamber, Heat Exchanger, Grate and Stainless Steel Burners.
FIVE YEAR WARRANTY
The following components are warranted for five (5) years to the original owner, subject to proof of purchase; Ceramic
Fiber Logs.
BASIC WARRANTY
MHSC warrants the components and materials in your gas appliance to be free from manufacturing and material
defects for a period of two (2) years from date of installation. After installation, if any of the components manufactured
by MHSC in the appliance are found to be defective in materials or workmanship, MHSC will, at its option, replace or
repair the defective components at no charge to the original owner. MHSC will also pay for reasonable labor costs
incurred in replacing or repairing such components for a period of two (2) years from date of installation. Any products
presented for warranty repair must be accompanied by a dated proof of purchase.
This Limited Lifetime Warranty will be void if the appliance is not installed by a qualified installer in accordance with
the installation instructions. The Limited Lifetime Warranty will also be void if the appliance is not operated and maintained according to the operating instructions supplied with the appliance, and does not extend to (1) firebox/burner
assembly damage by accident, neglect, misuse, abuse, alterations, negligence of others, including the installation
thereof by unqualified installers, (2) the cost of removal, reinstallation or transportation of defective parts on the appliance, or (3) incidental or consequential damage. All service work must be performed by an authorized service representative.
This warranty is expressly in lieu of other warranties, express or implied, including the warranty of merchantability
of fitness for purpose and of all other obligations or liabilities. MHSC does not assume for it any other obligations or
liabilities in connection with sale or use of the appliance. In states that do not allow limitations on how long an implied
warranty lasts, or do not allow exclusion of indirect damage, those limitations of exclusions may not apply to you. You
may also have additional rights not covered in the Limited Lifetime Warranty.
MHSC reserves the right to investigate any and all claims against the Limited Lifetime Warranty and decide upon
method of settlement.
IF WARRANTY SERVICE IS NEEDED...
1. Contact your supplier. Make sure you have your warranty, your sales receipt and the model/serial number of your
MHSC product.
2. DO NOT ATTEMPT TO DO ANY SERVICE WORK YOURSELF.
41D2001
35
Page 36
MHSC
149 Cleveland Drive • Paris, Kentucky 40361
www.mhsc.com
FEBRUARY 2009
41D2001 • Rev. 6
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