Monessen Hearth Direct Vent Gas Fireplace HBDV300 User manual

MODELS:
HBDV300 & HBDV400
WARNINGS
IF THE INFORMATION IN THESE INSTRUCTIONS ARE
NOT FOLLOWED EXACTLY, A FIRE OR EXPLOSION
MAY RESULT CAUSING PROPERTY DAMAGE,
PERSONAL INJURY OR LOSS OF LIFE.
– Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
– WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the
fire department.
– 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.
This appliance may be installed in an aftermarket*,
permanently located, manufactured home (USA
only) or mobile home, where not prohibited by
local codes.
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.
* Aftermarket: Completion of sale, not for purpose of resale,
from the manufacturer.
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.
READ BEFORE INSTALLING. SAVE THESE INSTRUCTIONS
HBDV SERIES
DIRECT VENT
GAS FIREPLACE
INSTALLATION AND
OPERATING INSTRUCTIONS

2 54D5031
CONTENTS
Important Safety Information .......................... 3
Product Features.............................................. 5
Code Approval .................................................. 5
Pre-Installation Information......................... 6–9
High Elevation Installation............................. 6
Orifice Sizes, Pressures and BTUs............... 6
Before You Start............................................ 6
Fireplace Framing......................................... 7
Fireplace Dimensions.................................... 8
Fireplace Location......................................... 9
Clearances ...................................................... 10
Securing Fireplace to Floor or Framing ........11
Installation Information.................................. 12
Installation Precautions............................... 12
Vent Installation .............................................. 13
Optional Top Vent Application ..................... 14
Installation Planning.................................... 15
Rear (Through the Wall) Applications ......... 18
Horizontal Termination Configuration.......... 20
Below Grade Installations ........................... 22
Vertical Through-the-Roof Installation......... 23
Installation for Vertical Termination ............. 24
Vertical or Horizontal Flex Venting.............. 26
Fireplace Installation...................................... 28
Check Gas Type.......................................... 28
Installing Gas Piping to Fireplace/Burner
System Location.......................................... 28
Checking Gas Pressure ................................. 30
Electrical Installation...................................... 30
Electrical Wiring .......................................... 30
Remote Wall Mounted Switch..................... 31
Remote Wall Switch.................................... 31
Optional DC Remote Systems.................... 31
Optional Fan................................................ 31
Glass Removal & Brick Installation .............. 32
Final Installation ....................................... 33–35
Placement of lava rock, rock wool
and logs................................................. 33–35
Installing Andirons....................................... 35
Operating Instructions (Millivolt) .................. 36
What To Do If You Smell Gas...................... 36
Lighting Millivolt Pilot for the First Time....... 37
Lighting Pilot................................................ 37
Lighting Burner............................................ 38
To Turn Off Gas........................................... 38
Cleaning and Maintenance ............................ 39
Burner, Pilot and Control Compartment...... 39
Pilot Flame.................................................. 39
Burner ......................................................... 39
Burner Flame .............................................. 39
Vent System................................................ 40
Glass Door.................................................. 40
Logs ............................................................ 40
Rock Wool .................................................. 40
Troubleshooting ............................................. 41
Replacement Parts ................................... 43–48
Fireplace Components.......................... 43–44
Millivolt Engine Components ................ 45–46
Vent Components........................................ 47
Logs ............................................................ 48
Massachusetts Residents Requirements..... 49
Warranty ...........................................Back Cover

54D5031 3
4. Never install the fireplace
• in a recreational vehicle
• where curtains, furniture, clothing, or other flammable
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 from hot surfaces to avoid burns or cloth-
ing 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 let cool before servicing, install-
ing, 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 cir-
culating air passages clean. More frequent cleaning may
be needed due to excessive lint and dust. 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. See Cleaning and Maintenance, page 39.
11. Keep the area around your fireplace clear of combustible
materials, gasoline, and other flammable vapor and liq-
uids. Do not run fireplace where these are used or stored.
Do not place items such as clothing or decorations on or
around fireplace.
INSTALLER
Please leave these instructions with the appliance.
OWNER
Please retain these instructions for future reference .
IMPORTANT SAFETY INFORMATION
This fireplace is a vented product. This fireplace must be
properly installed by a qualified service person. The glass door
must be properly seated and sealed. If this unit is not properly
installed by a qualified service person with glass door properly
seated and sealed, combustion leakage can occur.
CARBON MONOXIDE POISONING: Early signs of
carbon monoxide poisoning are similar to the flu with head-
aches, 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 indi-
cated 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. capac-
ity.
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 neighbor’s
phone. Follow the gas supplier’s instructions. Continued on page 4
• 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 from
fire, burns, explosions, electrical shock and carbon monoxide poisoning.
WARNING

4 54D5031
IMPORTANT SAFETY INFORMATION
Continued from page 3
12. Do not use this fireplace to cook food or burn paper or
other objects.
13. Never place anything on top of fireplace.
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 Electrical 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.
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 insert, heat exchanger insert, or any
other accessory not approved for use with this fireplace.
21. Do not operate the fireplace with glass door removed,
cracked, or broken.
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.
IMPORTANT:
PLEASE READ THE FOLLOWING CAREFULLY
It is not unusual for gas fireplaces 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 ten (10) hours the first time you use it. Place
the fan switch in the “OFF” position during this time.
Never connect unit to private
(non-utility) gas wells. This
gas is commonly known as
wellhead gas.
WARNING
www.nficertified.org
We suggest that our gas hearth
products be installed and
serviced by professionals who
are certified in the U.S. by the
National Fireplace Institute®
(NFI) as Gas Specialists.

54D5031 5
PRODUCT FEATURES AND CODE APPROVAL
Off/Pilot/On Knob
Optional Remote
Receiver
Figure 1 - HBDV300 and HBDV400 Fireplace
• This appliance has been certi-
fied for use with either natural or
propane gas. See appropriate data
plates.
• This appliance is not for use with
solid fuels.
• The appliance is approved for
bedroom or bedsitting room
installations.
• The appliance must be installed
in accordance with local codes if
any. If none exist use the current
installation code. ANSI Z223.1/
NFPA 54 in the USA, CAN/CGA
B149 in Canada.
• This appliance is mobile home
approved.
• The appliance must be properly
connected to a venting system.
• The appliance is not approved for
closet or recessed installations.
Hi/Lo Knob
PRODUCT SPECIFICATIONS
The efficiency rating of this appli-
ance is a product thermal efficiency
rating determined under continuous
operating conditions and was deter-
mined independently of any installed
system.
Thermal efficiency up to 75%
AFUE efficiency up to 71%
CODE APPROVAL
Direct Vent type appliances draw all combustion air from outside of the dwelling through the vent pipe.
These appliances have been tested by CSA and found to comply with the established standards for DIRECT VENT GAS
FIREPLACE HEATERS in the USA and Canada as follows:
LISTED VENTED GAS FIREPLACE HEATER
TESTED TO: ANSI Z21.88-2007/CSA 2.33-2007 STANDARDS
A manufactured home (USA only) or mobile home OEM installation must conform with the Manufactured Home Con-
struction and Safety Standard, Title 24 CFR, Part 3280, or when such a standard is not applicable, the Standard for
Manufactured Home Installations, ANSI/NCSBCS A225.1, or Standard for Gas Equipped Recreational Vehicles and
Mobile Housing, CSA Z240.4.
Blower Control
On/Off/RS Switch
Ignitor

6 54D5031
PRE-INSTALLATION INFORMATION
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 4.5" Minimum Supply Pressure 11"
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
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/LPG
• Square (Resistant to Sulfur Compounds)
• Pipe Wrench
Model Number HBDV300 HBDV400
Natural Propane Natural Propane
Max. Btu/hr Input 23,000 23,000 27,000 26,000
Min. Btu/hr Input 16,000 18,000 19,000 20,000
Orifice size 2.35mm 1.50mm #41 1/16
HIGH ELEVATIONS
Input ratings are showin in BTU per hour adn are certified without deration for elevations up to 4,500 feet (1,370m) above
sea level.
For elevations above 4,500 feet (1,370m) in USA, installations 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 jurisdiction for installations at elevations above 4,500
fee (1,370m).

54D5031 7
B
A
D
F
H
A
E
C
1/2” or 5/8”
C
A
A
C
G
G
1/2” or 5/8”
1/2” or 5/8”
FIREPLACE FRAMING
Firebox framing can be built before or after the appliance is set in place. Construct firebox framing following Figure 2 and
the chart below for your specific installation requirements. See Figure 3 on Page 8 for firebox dimensions. The framing
headers may rest on the top of the firebox standoffs. Do not bring headers below top of 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.
Corner Installation
Stud Location
Inside Chase Installation
Figure 2 - Framing Dimensions
300 400
A 331/2" 371/2"
B 371/4" 407/8"
C 281/4" 291/4"
D 141/8" 131/2"
E 5511/16" 607/8"
F 2713/16" 307/16"
G 133/4" 161/2"
H 393/8" 431/16"
PRE-INSTALLATION INFORMATION
Do not fill spaces around firebox with insulation or other materials. This could cause
a fire.
WARNING

8 54D5031
E
H
D
A
G
F
L
M
O
J
3½"
⅝"
⅝"
½"
½"
I
B8¼"
I
N
C
K
PRE-INSTALLATION INFORMATION
DESCRIPTION
Key
Letter HBDV300 HBDV400
Overall Front Width A 331/16"37
1/16"
Inside Width B 297/8" 32"
Glass Width C 27" 29"
CTR Pipe Rear L/R D 161/2"18
1/2"
Rear Width E 28" 29"
Glass Height F 18" 203/8"
Total Height G 337/8"40
5/8"
Depth H 15" 181/4"
Figure 3 - Fireplace Dimensions
DESCRIPTION
Key
Letter HBDV300 HBDV400
Height to Standoffs I 37" 405/8"
CTR Pipe Height Rear J 295/8"33
1/8"
Top Face K 21/8"1
1/4"
Side Face L 11/2"2
1/2"
Bottom Face M 15/16"15/16"
Non-combustible N 51/4"6
1/8"
Chassis Height O 333/4"37
1/2"
FIREPLACE DIMENSIONS

54D5031 9
Y
EAB
C
D
F
Y
X
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. blower, wall switch, or remote control)
are desired. Consult your local building code agency to ensure compliance with local codes, including permits and inspec-
tions.
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. See Figure 4 for suggested loca-
tions.
• Location should be out of high traffic areas and away from 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. See Venting section found in this manual for allowable venting configurations.
• These units can be installed in a bedroom. See 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.
Figure 4 - Locating Gas Fireplace
A Flat on Wall
B Cross Corner
C Island**
D Room Divider*
E Flat on Wall Corner*
F Chase Installation
Y 4" Minimum
** Island (C) and room divider (D) installation is possible as long as the horizontal portion of vent system (X)
does not exceed 20'. See Installing Horizontal Termination Configuration on pages 18 and 19.
* When you install your fireplace in (D) room divider or (E) flat on wall corner positions (Y), a minimum of 6"
clearance must be maintained from perpendicular wall and front of fireplace.

10 54D5031
0"–12"
Maximum
Depth
12" Minimum
71"Minimum
Minimum 4"
From Both
Side Walls
FIREPLACE
WALL
COMBUSTIB
L
MATERIAL
AREA
4"
3"
2.5"
45°
2.5"
2.5"
1" 1.5"
1.5"
STUD
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 full width and depth of
the appliance.
WARNING
CLEARANCES
CLEARANCES TO COMBUSTIBLES
MANTEL CLEARANCES
NOTE: The combustible area above the facing must not protrude more than 3/4" from the facing. If it does,
it is considered a mantel and must meet the mantel requirements listed in this manual.
Figure 5 - Clearances Figure 5a - Mantel clearances.
NOTE
All mantel shelves, regardless of depth, should be a mini-
mum of 12" from top opening of fireplace. Mantel shelf
shall not exceed 12" maximum depth at 12" minimum
height from opening.

54D5031 11
The fireplace must be secured to the floor and/or to framing studs as shown in Figure 5. Use two (2) wood screws or masonry/
concrete screws to secure fireplace to the floor. Use four (4) screws to attach fireplace to framing. The side nailing flanges
are 1/2" or 5/8" to accommodate different wall thickness.
SECURING FIREPLACE TO FLOOR OR FRAMING
Figure 6 - Securing Fireplace to Floor and Framing Studs
Insulation
Board
Framing
Nail
Flange
Screws
Nail
Flange
Screws
Screws
Screws
Screws
WARNING
DO NOT REMOVE
INSULATION BOARD

12 54D5031
Read all instructions completely and thoroughly before attempting installation. Failure
to do so could result in serious injury, property damage or loss of life. Operation of
improperly installed and maintained venting system could result in serious injury,
property damage or loss of life.
WARNING
Failure to follow these instructions will
void the warranty.
NOTICE
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 MHS.
• Installation other than permitted by these instructions.
FINISHING MATERIAL
NOTE: Any remote wiring (i.e. remote control, wall switch, and optional fan) must be done prior to final
finishing to avoid costly reconstruction.
INSTALLATION INFORMATION
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 RTV103 or equivalent) must be used.
Never obstruct or modify the air inlet or outlet grills (louvers). This may create a
fire hazard.
WARNING

54D5031 13
3"
1"
1"
1"
3"
1"
1"
VENT INSTALLATION
Figure 7 - Combustible Clearances for Vent Pipe
WARNING WARNING
This fireplace must be vented to the outside. The venting system must NEVER be
attached to a chimney serving a separate solid fuel burning appliance. Each gas
appliance must use a separate vent system. Do not use common vent systems.
WARNING
Horizontal sections of this vent system require a minimum of 3" clearances to
combustibles at the top of the flue and 1" clearance at the sides and bottom until
the flue penetrates the outside wall. A minimum 1" clearance all around the flue is
acceptable at this point of penetration.
Vertical sections of this vent system require a minimum of 1" clearance to combustibles
on all sides of the pipe.
A Minimum of 3" Clearance
to the Top Is Required Along
Horizontal Length until Flue
Pipe Penetrates Outside Wall.
A Minimum 1" Clearance to
Combustibles Permitted All
Around Flue at Outside Wall

14 54D5031
Figure 9 - Removing Screws from Flue
Pipe Adapter and Flue Pipe Cover Figure 10 - Removing
Flue Pipe Figure 11 - Attaching Flue Pipe to
Top Vent Configurations
Screws Flue Pipe
Screws
Flue Pipe
Flue Cover
Flue Pipe
Cover
Flue Pipe
Adapter
Screws
Figure 8 - Removing top box and insulation
HBDV300 HBDV400
VENT INSTALLATION
OPTIONAL TOP VENT APPLICATION
The appliance is shipped as a rear vent unit. If the installation
layout requires the unit to be a top vent configuration the
appliance can be converted by following the steps below.
NOTE: REMOVE AND DISCARD TOP BOX AND
INSULATION ON TOP OF THE UNIT BETWEEN
THE STAND-OFFS. THIS BOX IS ONLY UTILIZED
WITH REAR-VENTAPPLICATIONS.
When removing and refitting the plates and adapter be sure the
associated gaskets are undamaged and refitted as required.
1. Remove the eight (8) screws securing the flue pipe adapter
to the fireplace body. See Figure 9.
2. Set the flue pipe adapter aside, complete with the gasket.
Do not damage the gaskets as the adapter and gasket must
be refitted.
3. Remove the eight (8) screws securing the flue pipe cover to
the top of the intake box and remove the cover and gasket.
See Figure 9.
4. Remove the six (6) screws securing the flue pipe to the
back of the intake box and remove the pipe and gasket. See
Figure 10.
5. Replace flue pipe to top of firebox. Ensure the gasket is
in place and undamaged. Secure with six (6) screws. See
Figure 11.
6. Place the flue pipe cover and gasket removed in step 3 over
the flue opening in back of the intake box.
7. Refit the flue pipe adapter and gasket to the top of fire-
place. Secure the adapter with eight (8) screws removed in
step 1.
After conversion to top vent
configuration the 4" (100mm) flue pipe
should be concentric within the 65/8"
(175mm) outer collar (within 1/4").
WARNING

54D5031 15
VENT INSTALLATION
INSTALLATION PLANNING
There are two basic types of direct-vent installation:
• Horizontal Termination
• Vertical Termination
It is important to select the proper length of vent pipe for the
type of termination you choose. It is also important to note the
wall thickness.
FOR HORIZONTAL TERMINATION
Select the amount of vertical rise desired. All horizontal run of venting must have 1/4" rise for every 12" of run towards the
termination.
You may use up to three 90° elbows in this vent configuration. See Horizontal Termination Configurations on pages 20 and
21.
FOR VERTICAL TERMINATION
Measure the distance from the fireplace floor to the ceiling. Add the ceiling thickness, the vertical rise in an attic or second
story, and allow for sufficient vent height above the roof line.
NOTE: You may use two 45° elbows in place of a 90° elbow. You must follow rise to run ratios when using
45° elbows. The appliance is approved for use with three 90° elbows maximum or a combination of 90°
and 45° elbows up to a maximum of 270°.
For two-story applications, firestops are required at each floor level. If an offset is needed in the attic, additional pipe and
elbows will be required.
You may use a chase with a vent termination with exposed pipe on the exterior of the house. See Installing Vent System in
a Chase below. If pipe is enclosed in chase, it is not exposed.
It is very important that the venting system maintain its balance between the combustion air intake and the flue gas exhaust.
Certain limitations apply to vent configurations and must be strictly followed.
INSTALLING A VENT SYSTEM IN AN OUTSIDE CHASE
A chase is a vertical boxlike structure built to enclose venting that runs along the outside of a building. A chase is required
for such venting.
Never run the vent pipe level or
downward. This may cause excessive
temperatures which could cause
a fire.
WARNING
Treatment of firestops and construction of the chase may vary from building type to
building type. These instructions are not substitutes for the requirements of local
building codes. You must follow all local building codes.
NOTICE
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

16 54D5031
V
V
V
V
V
V
V
V
D
L
E
B
C
F
B
B
BB
B
M
I
A
A
J
H
G
A
Operable
Fixed
Closed Fixed
Closed
Opera-
ble
K
A
A
A
G
VENT INSTALLATION
Always maintain minimum clearances around vent systems. The minimum clearances
to combustibles for horizontal vent pipe are 3" at the top and 1" at the sides and bottom
of the vent system until the pipe penetrates the nearest vertical wall (1" required). A
1" minimum clearance all around the pipe must be maintained at outside wall and on
vertical runs. Do not pack the open air spaces with insulation or other materials. This
could cause high temperatures and may present a fire hazard.
WARNING
Figure 12 - Horizontal Vent Termination Location
Vent Terminal Air Supply Inlet Area Where Terminals Not Permitted
Inside Corner DetailFOR HORIZONTAL TERMINATION
MINIMUM DISTANCES
A = Clearance above the grade, a veranda, porch, deck, or balcony [*12" (305mm) minimum].
B = Clearance to window or door that may be opened [*12" (305mm) minimum].
C = Clearance to permanently closed window [*minimum 12" (305mm) recommended to prevent condensation on
window]
D= Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of two (2) feet (610mm)
from the centerline of the terminal [18" (457mm) minimum].
E= Clearance to unventilated soffits [12" (305mm) minimum]. Clearance to vinyl soffit [30" (762mm)].
F = Clearance to an outside corner. See Figure 12.
G = Clearance to an inside corner. See Figure 12.
H = *Not to be installed above a gas meter/regulator assembly within three (3) feet (914mm) horizontally from the centerline
of the regulator.
I = Clearance to service regulator vent outlet [*3' (914mm) minimum].
J = Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance [*12"
(305mm)minimum].
K = Clearance to a mechanical air supply inlet [*6' (1829mm) minimum].
L= Clearance above a paved sidewalk or paved driveway located on public property [**7' (2133mm) minimum].
M= Clearance under veranda, porch, deck, or balcony. See Figure 13, page 17. [For Canada *12" (305mm)
minimum***].
* As specified in CAN/CGA B149 Installation Codes. Note: Local codes or regulations may require different
clearances.
** A vent must not terminate directly above a sidewalk or paved driveway, which is located between two single-family
dwellings and serves both dwellings.

54D5031 17
V
GG=6" (152mm)
FF=6" (152mm)
V
V
G
G = Combustible 24"(610mm)
Noncombustible 18"(457mm)
Combustible &
Noncombustible
H = 24" (610mm)
J = 20" (508mm)
V
H
J
C = Maximum depth of 48" (1219mm)
for alcove location
D = Minimum width for back wall of
alcove location
Combustible - 38" (965mm)
Noncombustible - 24" (610mm)
E =Clearance from corner in alcove
location
Combustible - 6" (152mm)
Noncombustible - 2" (51mm)
E
V
D
C
C
Inside Corner
Alcove Location
Outside Corner
Balcony with No Side Wall Balcony with Perpendicular
Side Wall
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
2 4 6 8 10 1214 16 1820
eg: A
VENT INSTALLATION
TERMINATION CLEARANCES FOR BUILDINGS WITH COMBUSTIBLE
AND NONCOMBUSTIBLE EXTERIORS
Figure 13 - Allowable Venting Chart
HOW TO USE THE VENT GRAPH
The Vent Graph should be read in conjunction with the following
vent installation instructions to determine the relationship between
the vertical and horizontal dimensions of the vent system.
1. Determine the height of the center of the horizontal vent pipe
exiting through the outer wall. Using this dimension on the
Sidewall Vent Graph below, locate the point intersecting with
the slanted graph line.
2. From the point of this intersection, draw a vertical line to the
bottom of the graph.
3. Select the indicated dimension, and position the fireplace in
accordance with same.
Example: If the vertical dimension from the floor of the
fireplace is 11' (3.4m) the horizontal run to the face of the
outer wall must not exceed 14' (4.3m).
Example:Iftheverticaldimensionfromtheflooroftheunit
is 7’ (2.14m), the horizontal run to the face of the outer
wall must not exceed 81/2' (2.6m).
Sidewall Vent Graph showing the relationship between vertical and
horizontal dimensions for a Direct Vent flue system. Figure 13 - Rear Wall Venting Graph
Horizontal Dimension From the Outside of
Termination to the Back of the Fireplace
Vertical Dimension From the Floor of Unit to the Center of the
Horizontal Vent Pipe
Dimensions in
Feet

18 54D5031
91/2"
(241mm)
91/2"
(241mm)
33/4"
(92mm)
71/2"
(190mm)
Maximum
20"
Top View Flat Installation
REAR (THROUGH THE WALL) APPLICATIONS
When installed as a rear vent unit this appliance may be vented directly to a termination located on the rear wall behind
the appliance
• The maximum horizontal distance between the rear of the appliance and the outside of termination is 20" (508 m). See
Figure 15.
• Only one 45° elbow is allowed in these installations.
VENTING INSTALLATION
Sealant is not required to assemble HBDV/DVBH
fireplace venting. Do not use silicone sealant at
the flue exhaust connections.
1. Find the pipe section’s direction label. The
label arrow shall be pointed away from the fire-
box and toward the termination. Firmly insert
the initial rigid section/elbow into the firebox
outer collar. Simpson “GS” and Selkirk “DT”
outer walls are hemmed and will snap into the
collar’s tabs. Attach Simpson’s DirectVent Pro
by fully inserting into the collar and securing
with self tapping screws. The screws shall only
penetrate the flue outer wall.
Refer to vent manufacturer’s installation
instructions to properly assemble flue.
2. Locate and cut the vent opening in the
wall. For combustible walls first frame in
opening.
Combustible Interior Walls: Cut a 111/2"H
x 91/2" W hole through the interior wall.
Combustible Exterior Walls: Cut a 91/2"H
x 91/2"W square hole through the exterior
wall frame. See Figure 17.
Noncombustible Walls: Hole opening
should be 71/2" (190mm) in diameter.
3. The center of the hole should line up with the
center line of the horizontal rigid vent pipe
end. Pipe shall always run level or uphill on
horizontal runs. Never run pipe down hill. See
Figure 17.
Figure 15 - Rear Vent Application,
Maximum Horizontal Distance
Figure 17 - Exterior Wall Framing Dimensions
Note: Horizontal runs of vent
must be supported every three
feet (914mm). Use wall straps
for this purpose.
Figure 16 - Rigid Vent Pipe Connections
Female
Locking Lugs
Male Slots

54D5031 19
HOT
HOT
VENT INSTALLATION
4. Apply a bead of non-hardening mastic around the outside
edge of vent cap. Position the vent cap in the center of hole
on the exterior wall with the word “HOT” on the vent cap
facing up. Insure proper clearance of 1" to combustibles is
maintained to the flue. Attach the vent cap with four wood
screws supplied. See Figure 18.
Do not recess vent termination
into any wall. This will cause a
fire hazard.
WARNING
NOTE: Replace the wood screws with appropriate
fasteners for stucco, brick, concrete, or other types
of siding.
Figure 18 - Installing Horizontal Termination
REAR WALL VENT INSTALLATION (continued)
Figure 19 - Installing Simpson/Selkirk Vinyl
Siding Standoff and Termination
Apply
Mastic to
All Four
Sides
Vent Cap
Wood
Screw
Cut Vinyl Siding
Away to Fit Standoff
Wood Screw
Simpson
Termination
#985
Bolt
Apply Mastic to
All Four Sides
Nut
Standof #950
Figure 20 - Installing Firestop on
Horizontal Vent Pipe
Interior Wall
Surface
Firestop
Horizontal
Vent Pipe
Screw
Vent Cap
(Horizontal
Termination)
A vinyl siding standoff (part #950) must be used with the Simpson/Selkirk Horizontal Termination (part #985) on vinyl,
stucco or wood-clad exterior walls. Apply non-hardening mastic around outside edge of the standoff instead of the vent cap
assembly. See Figure 19.
5. Slide the firestop over the vent pipe before connecting the horizontal run to the vent cap. See Figure 20.
6. The termination should overlap the flue a minimum of 11/4" Apply silicone to the outer pipe/termination connection.
Fasten termination with screws provided.
7. Slide the firestop against the interior wall surface and attach with screws. See Figure 20.

20 54D5031
VENT INSTALLATION
HORIZONTAL TERMINATION CONFIGURATIONS
Since it is very important that the venting system maintain its balance between the combustion air intake and the flue
gas exhaust, certain limitations as to vent configurations apply and must be strictly adhered to.
The Vent Graph, showing the relationship between vertical and horizontal side wall venting, will help to determine the vari-
ous dimensions allowable. See Figure 13, page 17.
NOTE: Horizontal sections of this vent system require a minimum of 3" clearances to combustibles at the top of the
flue and 1" clearance at the sides and bottom until the flue penetrates the outside wall. A minimum 1" clearance all
around the flue is acceptable at this point of penetration.
Vertical sections of this vent system require a minimum of 1" clearance to combustibles on all sides of the pipe.
When vent exits through foundations less than 20" below outcrop, the termination must be flush up with outcropped wall
above.
It is best to locate the fireplace in such a way that minimizes the number of offsets and horizontal vent length.
The horizontal vent run refers to the total length of vent pipe from the flue collar of the fireplace (or the top of the Transition
Elbow) to the face of the outer wall.
Figure 21 - Maximum Three (3) 90° Elbows
Per Installation
• The maximum number of 90° elbows per side wall installation is three (3). See Figure 21.
• If a 90° elbow is fitted directly on top of the fireplace flange the maximum horizontal vent run before the termination
or a vertical rise is 36” (914 mm). See Figure 22.
Figure 22 - Maximum Horizontal Run with No Rise
3 x 90°
Elbows
3 x 90°
Elbows
36"
Max.
36"
Max.
When installing the appliance as a rear vent unit, the 90° or 45° transition elbow
attached directly to the rear of the unit is NOT INCLUDED in the following criteria and
calculations, and unless specifically mentioned should be ignored when calculating
venting layouts.
WARNING