Monessen Hearth MDV500, MDV600 User Manual
MDV SERIES
DIRECT VENT GAS FIREPLACE
INSTALLATION AND OPERATING
INSTRUCTIONS
MODELS: MDV500 and MDV600
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 OEM installation
in manufactured home (USA only) or mobile home and
must be installed in accordance with the manufacturer's
instructions and the manufactured home construction
and safety standard, Title 24 CFR, Part 3280 or Standard
for Installation in Mobile Homes. CAN/CSA Z3-240MH.
This appliance is only for use with the type(s) of gas
indicated on the rating plate unless a certified kit is
used.
WARNINGS
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
CONTENTS
Thank you and congratulations on your purchase of a
Monessen Hearth Systems 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
Product Features .............................................. 5
Code Approval .................................................. 5
Pre-Installation Information ............................. 6
Installing Above 2000 Feet............................ 6
Orifice Sizes, Pressures and BTUs ............... 6
Before You Start............................................ 6
Fireplace Framing ......................................... 7
Fireplace Dimensions.................................... 8
Fireplace Location ......................................... 9
Securing Fireplace to Floor or Framing ....... 10
Clearances ...................................................... 11
Installation Information .................................. 12
Vent Installation .............................................. 13
Installation Precautions ............................... 13
Optional Top Vent Application..................... 14
Installation Planning .................................... 15
Installation for Vertical Termination ............. 15
For Horizontal Termination.......................... 16
How to Use a Vent Graph ........................... 17
Rear Wall Vent Installation .......................... 18
Horizontal (Through-the-Wall) Termination
Configurations ............................................. 21
Horizontal with Vertical Rise
(Through-the-Wall) Applications.................. 22
Below Grade Installation ............................. 23
Vertical Through-the-Roof Installation......... 24
Installation for Vertical Termination ............. 26
Flat Ceiling Installation ................................ 26
Fireplace Installation ...................................... 28
Check Gas Type ......................................... 28
Installing Gas Piping to Fireplace Location . 28
Checking Gas Pressure ................................. 30
Electrical Installation...................................... 31
Electrical Wiring .......................................... 31
Remote Wall Mounted Switch ..................... 31
Electronic Pilot Ignition Wiring..................... 32
Remote Wall Mounted Switch ..................... 32
Optional DC Remote System ...................... 32
Canopy Installation and Glass Removal ...... 33
Brick Installation............................................. 34
Logs and Rock Wool Installation .................. 35
Operating Instructions - Millivolt ................. 38
What To Do If You Smell Gas ..................... 38
Lighting Pilot for the First Time ................... 38
Lighting Pilot - Millivolt................................. 39
Lighting Burner - Millivolt ............................. 40
To Turn Off Gas - Millivolt ........................... 40
Operating Instructions - Electronic Ignition 41
Lighting Electronic Ignition .......................... 41
To Turn Off Gas - Electronic Ignition........... 41
Cleaning and Maintenance ............................ 42
Burner, Pilot and Control Compartment ...... 42
Burner Flame .............................................. 42
Vent System ................................................ 43
Glass Door .................................................. 43
Logs ............................................................ 43
Rock Wool .................................................. 43
Replacement Parts ......................................... 44
Vent Components for 4"x6
Vent Components for 5"x8" ......................... 45
Firebox Components ................................... 46
Logs ............................................................ 47
Additional Accessories ............................... 48
Standing Pilot - Millivolt Control .................. 50
Electronic Ignition ........................................ 52
Troubleshooting ............................................. 54
5
/8" ..................... 44
For Massachusetts Residents Only .............. 56
Warranty ...........................................Back Cover
2 75D2523
IMPORTANT SAFETY INFORMATION
INSTALLER
Please leave these instructions with the appliance.
• 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
WARNING
fire, burns, explosions, electrical shock and carbon monoxide poisoning.
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 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 odormaking 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 neighbor’s
phone. Follow the gas supplier’s instructions.
OWNER
Please retain these instructions for future reference
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 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 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 from 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. See Cleaning and Maintenance, page 42.
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.
Continued on page 4
.
75D2523 3
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 under or exposed
to, water. Immediately call a qualified service technician to inspect the appliance and replace any part of
the control system and any gas control which has been
submerged in water.
19. Do not operate fireplace if any log is 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 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 ten (10) hours the first time you use it. Place
the fan switch in the “OFF” position during this time.
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.
www.nficertified.org
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.
22. Massachusetts residents only see pages 56 and
Never connect unit to private
(non-utility) gas wells. This gas is
commonly known as wellhead gas.
WARNING
57.
4 75D2523
PRODUCT FEATURES AND CODE APPROVAL
PRODUCT SPECIFICATIONS
• This appliance has been certified 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 bed-
room 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 con-
nected to a venting system.
• The appliance is not approved for
closet or recessed installations.
Hood
Insulation
Board
1
/2"
Nailing
Flange
WARNING
Do not remove
insulation board.
5
/8"
Nailing
Flange
Hi/Lo Knob
Off/Pilot/On Knob
On/Off/RS Switch
Ignitor
Figure 1 - MDV500 and MDV600 Fireplace
(Millivolt Unit Shown —
Also Available in Electronic Ignition)
Blower Control
Optional Remote
Receiver
1
/2" Nailing
Flange
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 Z21.88-2005/CSA 2.33-2005 STANDARDS
A manufactured home (USA only) or mobile home OEM installation must conform with the Manufactured Home Construction 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.
75D2523 5
PRE-INSTALLATION INFORMATION
INSTALLING ABOVE 2000 FEET
• In the USA, the appliance must be derated 4% for every 1,000 ft above 2,000 ft elevations.
• In Canada, these appliances are certified for altitudes of 0 – 2000 ft, and must be de-rated by 10 percent for installations
between 2000 and 4,500 ft. (derate an additional 4% for every 1,000 ft. above 4,500 ft. elevations).
If the heating value of the gas has been reduced, these rules do not apply. To identify the proper orifice size, check with local
gas utility.
If installing this appliance at an elevation above 4,500 feet (in Canada), check with local authorities.
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" Minimum Supply Pressure 11"
Model Number
Max. Btu/hr Input 30,000 30,000 32,000 32,000
Min. Btu/hr Input 21,500 23,500 22,000 26,000
Burner Orifice size (as shipped) 7/64" #51 #34 #50
Natural Propane Natural Propane
MDV500 MDV600
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) • Fasteners • Front Floor Brick Assembly
• White Toggle Switch • Rock Wool • Non-Combustible Panel
• Log Set • Switch Cover Plate
• Canopy • Restrictor Plate/Disc (2 each)
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
6 75D2523
PRE-INSTALLATION INFORMATION
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.
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
H
C
D
F
MDV500 MDV600
A421/16"48
B461/2"46
C323/4"38
D163/8"19
E731/2"79
F363/4"39
G203/8"20
H 52" 561/4"
1
1
3
3
1
3
3
/16"
/2"
/4"
/8"
/2"
/4"
/8"
1
/2" or 5/8"
B
A
E
Corner Installation
G
C
A
Inside Chase Installation
C
G
1
5
"
"
G
1
/2" or 5/8"
A
A
Recessed Installation
Stud Location
Figure 2 - Framing Dimensions
75D2523 7
PRE-INSTALLATION INFORMATION
FIREPLACE DIMENSIONS
B
F
3
20
/4"
149/16"
A
Ref. to Framing
22
5
/16"
MDV500 MDV600
A4113/16"4713/16"
B323/16"38
3
/16"
C3215/16"3815/16"
D 36" 42"
E 41" 47"
F161/8"19
1
/8"
5
/16"
46
Ref. to
Framing
427/16"
Ref. to
Wall
5"
34
1
23
/2"
3
/16"
2
15
2"
1
/2"
/16"
5
/8"
1
/2"
1
/2"
5
/8"
C
D
3
3
/8"
E
Ref. to Wall
Figure 3 - MDV500 Fireplace Dimensions
3
/8"
40
5
34
/8"
to
Center
of Pipe
3
7
/8"
1
12
/16"
8 75D2523
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 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. See Figure 4 for suggested locations.
• 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.
A Flat on Wall
B Cross Corner
E
Y
A
B
C Island**
D Room Divider*
C
X
E Flat on Wall Corner*
F Chase Installation
D
Y
Y 6" Minimum
F
Figure 4 - Locating Gas Fireplace
** 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 20 through 22.
* 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.
75D2523 9
SECURING FIREPLACE TO FLOOR OR FRAMING
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 brackets or nailing flanges are designed to accommodate two thickness of wall boards (
Framing
Screws
1
/2" or 5/8").
Framing
Nail Flange
Screws
Screws
Screws
Nail Flange
Screws
Figure 5 - Securing Fireplace to Floor and Framing Studs
10 75D2523
CLEARANCES TO COMBUSTIBLES
Follow these instructions carefully to ensure safe installation. Failure to follow
in struc tions 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 ex tend ing full width
WARNING
and depth of the appliance.
CLEARANCES
72" minimum
Side wall
12"
maximum
Combustible mantle
12"
103/4"
12" minimum
12"
Wall
Stud
Insulation
Board
10"
8"
6"
4"
1
/2"
1
/4"
7"
2
6"
1
/2"
9
8
Side View
6" minimum from
both side walls
FIREPLACE
COMBUSTIBLE
MATERIAL
AREA
WAL L
Figure 6 - Clearances from the Mantel,
Ceiling, and Side Wall
1"
1.5"
1.5"
3.5"
3.5"
4.5"
3"
5"
6"
45°
MANTEL CLEARANCES
NOTE: The combustible area around the fireplace must
not protrude more than 1/2" from the facing. If it does, it is
HOOD
2.5"
Top View
considered a mantel and must meet the mantel requirements
listed in this manual.
75D2523 11
Figure 7 - Mantel Clearances
INSTALLATION INFORMATION
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.
Never obstruct or modify the air inlet
or outlet grills (louvers). This may
create a fire hazard.
WARNING
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.
VENT INSTALLATION
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 the 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 Monessen Hearth Systems
• Installation other than permitted by these instructions.
12 75D2523
VENT INSTALLATION
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.
WARNING
WARNING
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.
3"
1"
1"
A Minimum 1"
Clearance to
Combustibles
Permitted All
Around Flue at
Outside Wall
Figure 8 - Combustible Clearances for Vent Pipe
75D2523 13
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.
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 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 bottom of the intake box.
After conversion to top vent
configuration the 5" (127mm) flue
pipe should be concentric with the 8"
(203mm) outer collar within
WARNING
Flue Pipe
Flue Pipe
Adapter
Cover
1
/4".
Screws
7. Refit the flue pipe adapter and gasket to the top of fireplace. Secure the adapter with six (6) screws removed in
step 1.
Flue
Cover
Flue Pipe
Screws
Figure 9 - Removing sixteen (16) Screws from
Flue Pipe Adapter and Flue Pipe Cover
Flue Pipe
Screws
Figure 10 - Removing Flue Pipe
14 75D2523
Figure 11 - Attaching Flue Pipe to Top
Vent Configurations
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
the termination.
1
/4" rise for every 12" of run towards
Never run the vent pipe level or
downward. This may cause excessive
temperatures which could cause
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 fire.
WARNING
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.
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
75D2523 15
VENT INSTALLATION
Inside Corner Detail FOR HORIZONTAL TERMINATION
G
V
H
D
E
B
L
Vent Terminal Air Supply Inlet Area Where Terminals Not Permitted
V
C
Fixed
V
Closed
F
Operable
V
B
A
BB
B
Opera-
ble
V
A
V
Fixed
Closed
J
V
A
B
Figure 12 - Horizontal Vent Termination Location
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 13, page 17.
G = Clearance to an inside corner. See Figure 13, page 17.
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.
*** Only permitted if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
A
G
I
M
V
A
K
A
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 outside vertical wall (1" required). A
1" minimum clearance all around the pipe must be maintained. Do not pack the open
air spaces with insulation or other materials. This could cause high temperatures and
WARNING
may present a fire hazard.
16 75D2523
TERMINATION CLEARANCES FOR BUILDINGS WITH COMBUSTIBLE
AND NONCOMBUSTIBLE EXTERIORS
VENT INSTALLATION
G
Combustible =
6” (152mm)
Noncombustible =
V
2” (51mm)
Inside Corner
V
Combustible =
F
6” (152mm)
Noncombustible =
2” (51mm)
Outside Corner
H
G
V
Combustible &
G = Combustible 24"(610mm)
Noncombustible 18"(457mm)
Balcony with No Side Wall Balcony with Perpendicular
Noncombustible
H = 24" (610mm)
J = 20" (508mm)
V
J
Side Wall
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 A: 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 B: If the vertical dimension from the floor of the
unit is 7' (2.14m), the horizontal run to the face of the
outer wall must not exceed 8
Sidewall Vent Graph showing the relationship between vertical and
horizontal dimensions for a Direct Vent flue system.
1
/2' (2.6m).
D
C
C
V
E
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)
Alcove Location
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
Horizontal Dimension From the Outside Face of the Wall
Dimensions in
Feet
eg: A
2 4 6 8 10 12 14 16 18 20
to the Back of the Fireplace
Vertical Dimension From the Floor of Unit to the Center of the
Horizontal Vent Pipe
Figure 14 - Rear Wall Venting Graph
75D2523 17
VENTING INSTALLATION
REAR WALL VENT INSTALLATION (5"X8" VENTING ONLY)
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 termination is 20" (508 m). See
Figure 15.
• Only one 45° elbow is allowed in these installations.
Female
Maximum
20"
Top View Flat Installation
Figure 15 - Rear Vent Application,
Maximum Horizontal Distance
1. Rigid vent pipes and fittings have special
twist-lock connections. Assemble the desired
combination of pipe and elbows to the appliance adaptor.
Twist-lock Procedure: The female ends
of the pipes and fittings have three locking
lugs (indentations). These lugs will slide
straight into matching slots on the male end of
adjacent pipes and fittings. Push the pipe sections together and twist one section clockwise
approximately one-quarter turn until the sections are fully locked. See Figure 16.
Figure 16 - Rigid Vent Pipe Connections
101/2"
(267mm)
Locking Lugs
Note: Horizontal runs of vent
must be supported every three
feet (914mm). Use wall straps
for this purpose.
Male Slots
2. See venting and termination instructions for
further instructions.
3. Locate and cut the vent opening in the wall.
For combustible walls first frame in opening.
Combustible Interior Walls: Cut a 12
1
/2"H x
101/2"
(267mm)
Combustible
Wall
101/2" W hole through the interior wall.
Combustible Exterior Walls: Cut a 10
1
/2"H
x 101/2"W square hole through the exterior
wall frame. See Figure 17.
Noncombustible Walls: Hole opening should
be 81/2" (216mm) in diameter.
81/2"
(216mm)
Noncombustible
Wall
4. The center of the hole should line up with the
center line of the horizontal rigid vent pipe
1
end. Allow
/4" minimum rise per foot. See
Figure 17 - Exterior Wall Framing Dimensions
Figure 17.
18 75D2523
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