Vermont Castings 33CFDV(N/P)(V/I)SB User manual

CFDV Series Direct Vent Gas Fireplace
Installation and Operating Instructions
Models: 33CFDV(N/P)(V/I)SB, 36CFDV(N/P)(V/I)SB, 42CFDV(N/P)(V/I)SB
20306739 11/14 Rev. 1
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for
future reference.
• 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.
– Leave the building immediately.
– 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, service or maintenance can cause
injury or property damage. Refer to this manual.
For assistance or additional information consult
a qualified installer, service agency or the
gas supplier.
Thisappliancemaybeinstalledinanaftermarket,*
permanently located, manufactured home (USA
only) or mobile home, where not prohibited by
local codes.
This applianceisfor use only withthe 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.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death or
property damage.
DANGER
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
A barrier designed to reduce the risk of burns from
the hot viewing glass is provided with this
appliance and shall be installed.
CERTIFIED
SAFETY BARRIER

CFDV Series Gas Fireplace
220306739
CONTENTS
Important Safety Information ................................................3
Code Approval........................................................................ 4
Product Features.................................................................... 5
Product Specifications....................................................... 6
Fireplace Controls............................................................. 6
Gas Specifications & Orifice Sizes.................................... 6
Gas Pressures................................................................... 6
High Elevations ................................................................. 6
Cold Climate Insulation .....................................................6
Fireplace & Framing Dimensions...................................... 7
Pre-Installation Information................................................... 6
Before You Start................................................................ 6
Items Required for Installation........................................... 6
Fireplace Framing ............................................................ 6
Fireplace Location............................................................. 8
Clearances .............................................................................. 8
Clearances to Combustibles ............................................. 8
Mantel Clearances ............................................................ 8
Fireplace Installation.............................................................. 9
Secure Fireplace to Floor or Framing................................ 9
Finishing Material.............................................................. 9
Venting Installation Information.......................................... 10
Optional Top Vent Application.......................................... 10
Installation Precautions................................................... 12
General Venting .............................................................. 12
Termination Location................................................ 13
Termination Clearances ........................................... 14
Assembling Vent Pipe ..................................................... 14
Flex Vent Pipe.................................................................14
Twist Lock Pipe ............................................................... 15
Rear Vent Installation Only.............................................. 15
How to Use the Vent Graph............................................. 16
Vent Pipe Clearances...................................................... 17
Rear Wall Vent Applications ........................................... 18
Rear Wall Vent Installation—Twist Lock Pipe.................. 18
Rear Wall Vent Installation—Flex Vent Pipe ...................18
Top Vent Side WallApplication........................................ 19
Vertical Side WallApplications........................................ 21
Vertical Side Wall Installaion—Twist Lock Pipe............... 21
Vertical Side Wall Installation—Flex Vent Pipe ............... 22
Below Grade Installation ................................................. 23
Vertical Through-the-Roof Application............................. 24
Vertical Through-the-Roof Installation............................. 25
Gas Pipe Installation............................................................ 27
Check Gas Type.............................................................. 27
Installation Items Needed................................................ 27
Gas Pipe Installation ....................................................... 28
Check Gas Pressure – Millivolt ....................................... 29
Electrical Installation – Millivolt.......................................... 29
Electrical Wiring............................................................... 29
Remote Wall Mounted Switch......................................... 30
Remote Wall Switch........................................................ 30
Optional DC Remote Systems ........................................ 30
Optional Fan/Blower System BLOT ................................ 31
Optional Fan/Blower System FK12................................. 31
Operating Instructions – Millivolt........................................ 32
For Your Safety Read Before Lighting.............................32
What To Do If You Smell Gas.......................................... 32
Lighting Pilot for the First Time........................................ 32
Lighting Pilot.................................................................... 33
Lighting Burner................................................................ 34
To Turn Off Gas...............................................................34
Check Gas Pressure and Electrical Installation – IPI........ 35
Electrical Wiring............................................................... 35
Junction Box Wiring......................................................... 36
Wall Switch Installation....................................................36
IPI System Wiring Diagram............................................. 37
Operating Instructions – IPI................................................. 38
For Your Safety Read Before Lighting.............................38
What To Do If You Smell Gas.......................................... 38
Operating Instructions..................................................... 39
To Turn Off Gas...............................................................39
EcoLogic Control System Operation and Indications...... 40
Final Installation................................................................... 41
Glass Frame Removal..................................................... 41
Pilot Flame ...................................................................... 42
Burner Flame................................................................... 42
Installing Porcelain Liner Kit............................................ 42
Installing Brick Liner Kit................................................... 43
Rockwool Placement....................................................... 43
Adjustable Baffle ............................................................. 44
Log Placement ................................................................ 44
Lava Rock and Ember Placement................................... 45
Fireglass and Stone Placement ...................................... 46
Fireglass Only Placement ............................................... 47
Safety Barrier Installation................................................ 47
Safety, Cleaning and Maintenance...................................... 48
Burner, Pilot and Control Compartment .......................... 48
Burner.............................................................................. 48
Vent System.................................................................... 48
Glass Frame.................................................................... 48
Logs................................................................................. 48
Rock Wool ...................................................................... 48
Stones and Fireglass....................................................... 48
Troubleshooting ................................................................... 49
Millivolt Standing Pilot Ignition......................................... 49
IPI System....................................................................... 50
All Control/Pilot Systems................................................. 51
Optional Accessories........................................................... 51
Replacement Parts............................................................... 52
Firebox Components....................................................... 52
Logs................................................................................. 52
Standing Pilot – Millivolt Control...................................... 53
IPI System....................................................................... 54
Venting Components............................................................ 55
Massachusetts Requirements............................................. 58
Limited Lifetime Warranty Policy........................................ 59
Efficiency Ratings ................................................................ 60
PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING APPLIANCE.
Thank you and congratulations on your purchase of a Vermont Castings Group fireplace.
IMPORTANT: Read all instructions and warnings carefully before starting installation.
Failure to follow these instructions fully may result in a possible fire hazard and will void the warranty.

CFDV Series Gas Fireplace
20306739 3
3. For propane/LP fireplace, do not place propane/LP
supplytank(s) insideany structure. Locate propane/LP
supplytank(s) outdoors.To prevent performanceprob-
lems, do not use propane/LP fuel tank of less than 100
lbs. capacity.
4. 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 .
• Immediatelycallyourgassupplierfromaneighbor’s
phone. Follow the gas supplier’s instructions.
5. Never install the fireplace:
• In a recreational vehicle
•Where curtains, furniture, clothing, or other flam-
mable objects are less than 36" from the front, top,
or sides of the fireplace
•In high traffic areas
•In windy or drafty areas
6. Due to high temperatures, the appliance should be
located out of traffic and away from furniture and
draperies.
7. This fireplace reaches high temperatures. Children
and adults should be alerted to the hazards of high
surface temperature and should stay away to avoid
burns or clothing ignition. Fireplace will remain hot
for a time after shutdown.Allow surfaces to cool before
touching.
8. Young children should be carefully supervised
when they are in the same room as the appliance.
Toddlers, young children and others may be sus-
ceptible to accidental contact burns. A physical
barrier is recommended if there are at risk individu-
als in the house. To restrict access to a fireplace
or stove, install an adjustable safety gate to keep
toddlers, young children and other at risk individu-
als out of the room and away from hot surfaces.
9. Clothing or other flammable material should not be
placed on or near the appliance.
10. When the appliance is installed directly on carpeting,
tileor other combustiblematerial other thanwood floor-
ing, you must set appliance on a metal or wood panel
or hearth pad extending the full width and depth of the
appliance.
11. Do not modify fireplace under any circumstances. Any
parts removed for servicing must be replaced prior to
operating fireplace.
12. Turn fireplace off and let cool before servicing, install-
ing,or repairing. Onlya qualifiedservice person should
install, service, or repair the fireplace. Have burner
system inspected annually by a qualified service
person.
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: Earlysigns of carbon
monoxide poisoning are similar to the flu with headaches,
dizziness and/or nausea. If you have these signs, the fire-
place 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
thismanual for reference.It is yourguide to safeand proper
operation of this fireplace.
1. Installation and repair should be done by a qualified
service person. The appliance should be inspected
before use and at least annually by a professional
service person. More frequent cleaning may be
required due to excessive lint from carpeting,
bedding material, et cetera. It is imperative that
control compartments, burners and circulating air
passageways of the appliance be kept clean.
2. 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.
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 tryingto 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 andcarbon
monoxide poisoning.
WARNING

CFDV Series Gas Fireplace
420306739
IMPORTANT SAFETY INFORMATION
13. You must keep control compartments, burners, and
circulatingair passages clean. More frequent cleaning
maybe needed due to excessivelint and dust.Turn off
the gas valve and pilot light before cleaning fireplace.
14. Have venting system inspected annually by a quali-
fied service person. If needed, have venting system
cleaned or repaired. Refer to Cleaning and Mainte-
nance, Page 47.
15. Keep the area around your fireplace clear of combus-
tible materials, gasoline, and other flammable vapor
and liquids. Do not run fireplace where these are used
orstored. Do not place items such asclothing ordeco-
rations on or around fireplace.
16. Do not use this fireplace to cook food or burn paper or
other objects.
17. Never place anything on top of fireplace.
18. Do not use any solid fuels (wood, coal, paper, card-
board, etc.) in this fireplace. Use only the gas type
indicated on rating plate.
19. 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/NFPA70,or the Canadian ElectricalCode,
CSA C22.1.
20. 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.
21. Do not use fireplace if any part has been under water.
Immediately call a qualified service technician to
inspect the appliance and to replace any part of the
control system and any gas control which as been
under water.
22. Do not operate fireplace if any log is broken.
23. Do not use a blower insert, heat exchanger insert, or
any other accessory not approved for use with this
fireplace.
24. Do not operate appliance with the glass front
removed, cracked, or broken. Replacement of the
glass should be done by a licensed qualified ser-
vice person.
WARNING
Never connect unit to private (non-utility)
gas wells. This gas is commonly known
as wellhead gas.
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
Itis not unusual forgas fireplaceto give off some
odor the first time it is burned. This is due to the
manufacturing process.
Please ensurethat your roomis 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.
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 Z21.88-2014/CSA 2.33-2014 STANDARDS
The installation must conform with local codes or, in the
absence of local codes, with the National Fuel Gas Code,
ANSI Z223.1/NFPA 54, or the National Gas and Propane
Installation Code, CSA B149.1.
A manufactured home (USA only) or mobile home OEM
installation must conform with the Manufactured Home
ConstructionandSafetyStandard,Title24CFR,Part 3280,
orwhen such astandard is notapplicable, the Standardfor
ManufacturedHome Installations,ANSI/NCSBCSA225.1,
or Standard for Gas Equipped Recreational Vehicles and
Mobile Housing, CSA Z240.4.

CFDV Series Gas Fireplace
20306739 5
PRODUCT FEATURES
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 bedroom or bedsitting
room installations.
•
Theappliance must beinstalled in accordancewith local
codes. If none exist use the current installation code:
ANSIZ223.1/NFPA54intheUSA, CSAB149inCanada.
• This appliance is mobile home approved.
• The appliance must be properly connected to a venting
system.
• The appliance is not approved for closet installations.
• Thisappliance is approvedto be vented using Duravent
and Vermont Castings Group Twist-Lock Direct Vent
components.
The classification “noncombustible material” includes, but
is not limited to stone, brick and mortar. Noncombustibles
are safe to overlay the black-painted metal face (including
radiant plates) and do not pose a fire hazard. Do not allow
any noncombustible finish material to extend past or inter-
fere with fireplace opening.
Theclassification“combustiblematerial”includes,but is not
limitedto plywood, drywalland particle board.Combustible
materials may contact the sides, bottom or back of firebox.
Do not overlay the black painted face with combustible
materials.
Figure 1 –
CFDV Fireplace Controls – Millivolt
HIGH ELEVATIONS
Inputratingsare shown inBTUper hour andarecertified
without derating for elevations up to 4,500 feet (1,370
m) above sea level.
For elevations above 4,500 feet (1,370 m) in USA,
installations must be in accordance with the current
ANSI Z223.1/NFPA 54 and/or local codes having juris-
diction.
InCanada,pleaseconsultprovincialand/or local authori-
ties having jurisdiction for installations at elevations
above 4,500 feet (1,370 m).
GAS SPECIFICATIONS & ORIFICE SIZE
GAS PRESSURES
Natural Gas Propane (LP)
Inlet Minimum 5.5" w.c. 11.0" w.c.
Inlet Maximum 14.0" w.c. 14.0" w.c.
Manifold Pressure 3.5" w.c. 10.0" w.c.
Off/Pilot/On Knob
Hi/Lo Knob
FP3011
FIREPLACE CONTROLS COLD CLIMATE OPTION (IPI Models Only)
NOTE: If you live in a cold climate, seal all cracks around
yourappliance and wherevercold air couldenter the room,
with noncombustible material. It is especially important to
insulate the outside chase cavity between the studs and
under the floor on which the appliance rests, if the floor is
above ground level.
Your fireplace is equipped with an intermittent pilot ignition
(IPI) control.An IPI control with a standing pilot option pro-
videsthedualbenefitof an economical and environmentally
responsible product and one which lights easily even in
the coldest climates. When in intermittent pilot mode (as
it comes from the factory), your pilot remains unlit until
needed, saving you fuel. Standing pilot mode, by com-
parison, is characterized by a continuously burning pilot.
The benefit of a pilot which lights only when needed is fuel
savings. However, with no pilot burning in your fireplace,
unitsoperating incolder climates may experience delayed
start up or lock out. Because colder air is heavier than
milder air and there is no pilot burning to maintain a warm
stable temperature in your firebox, establishing a draft to
aid ignition becomes difficult. This is perfectly normal but
can be somewhat frustrating.
To remedy thisissue,yourfireplacehasbeendesignedwith
a cold climate pilot option, which, when active, maintains
a warmer temperature inside your firebox to make ignition
MODEL FUEL
MAX
INPUT
BTU/H
MIN.
INPUT
BTU/H ORIFICE SIZE
33CFDVNV NAT. 18,000 12,300 #47
33CFDVPV LP 18,000 16,000 #55
33CFDVNI NAT. 18,000 12,300 #47
33CFDVPI LP 18,000 16,000 #55
36CFDVNV NAT. 21,000 15,000 #44
36CFDVPV LP 21,000 17,500 #54
36CFDVNI NAT. 21,000 15,000 #44
36CFDVPI LP 21,000 17,500 #54
42CFDVNV NAT. 24,000 16,500 2.35mm
42CFDVPV LP 24,000 17,500 1.45mm
42CFDVNI NAT. 24,000 16,500 2.35mm
42CFDVPI LP 24,000 17,500 1.45mm

Control Board
Cold Climate Switch
Master Switch
LED indicator
CFDV Series Gas Fireplace
620306739
PRE-INSTALLATION INFORMATION
BEFORE YOU START
Read this homeowner manual thoroughly and follow all
instructions carefully. Inspect all contents for shipping
damageandimmediately inform yourdealer if anydamage
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)
• Log Set
• Rock Wool
• Volcanic Rock
ITEMS REQUIRED FOR INSTALLATION
Tools and Building Supplies:
• Phillips Screwdriver
• Hammer
• Pliers
• Square
• Level
• Tee Joint
• Pipe Wrench
• Saw and/or saber saw
• Measuring Tape
• Electric Drill and Bits
• Framing Materials
WARNING
Do not fill spaces around firebox with
insulation or other materials. This could
cause a fire.
FIREPLACE FRAMING
Firebox framing can be built before or after the appliance
is set in place. Construct firebox framing following Figure
3 (page 6) for specific installation requirements and for
firebox dimensions. The framing headers may rest on the
top of the firebox standoffs. Do not bring headers below
top of standoffs.
Thefireboxmay be installeddirectly onacombustible floor
or raised on a platform of an appropriate height. When
the firebox is installed directly on carpeting, tile, or other
combustiblematerial, otherthan wood flooring, the firebox
shall be installed on a metal or wood panel extending the
full width and depth of the enclosure.
Figure 2 –
CFDV Fireplace Controls–IPI (featuring Cold Climate option)
faster and more efficient. Operating your appliance in cold
climate (aka standing) pilot mode will prohibit the need for
multiple ignition attempts and will prevent the system from
delaying start up or locking out.
To activate the cold climate option, simply move the cold
climate toggle switch located on the right side of the black
controlcenter to the “On” (left) position. (Figure 2) You can
operateyour appliance in this moderegardless of whether
you are using a remote control, wall switch or thermostat.
• Wall Finishing Materials
• Caulking Material (Noncombustible)
• Fireplace Surround Material (Noncombustible)
• Piping Complying with Local Codes
• Pipe Sealant Approved for use with Propane/LPG
(Resistant to Sulfur Compounds)

G
F
H
A
CRE
15/16"
(24 mm)
Minimum Rough Opening Width
Q
Minimum Rough
Opening
Depth
Minimum Rough
Opening
Height
C
L
P
1/2" (13 mm)
or 5/8" (16 mm)
DLB
O
M
N
N
K
J
I
CFDV Series Gas Fireplace
20306739 7
Figure 3 –
CFDV Series Fireplace Dimensions
PRE-INSTALLATION INFORMATION
REFERENCE 33CFDV 36CFDV 42CFDV
FIREPLACE DIMENSIONS
A32
7⁄8" (835 mm) 37" (940 mm) 41" (1042 mm)
B35
5⁄8" (905 mm) 381⁄2" (978 mm) 381⁄2" (978 mm)
C32
7⁄8" (835 mm) 343⁄4" (883 mm) 343⁄4" (883 mm)
D 27" (689 mm) 291⁄8" (740 mm) 331⁄8" (841 mm)
E 18" (457 mm) 197⁄8" (505 mm) 197⁄8"(505 mm)
F15
7⁄8" (430 mm) 157⁄8" (430 mm) 157⁄8" (430 mm)
G21
1⁄8" (537 mm) 221⁄8" (562 mm) 261⁄2" (673 mm)
H23
1⁄4" (591 mm) 255⁄8" (657 mm) 255⁄8" (657 mm)
I29
7⁄8" (759 mm) 32" (813 mm) 36" (914 mm)
J2
1⁄4" (57 mm) 21⁄4" (57 mm) 21⁄4" (57 mm)
K4
3⁄8" (111 mm) 43⁄8" (111 mm) 43⁄8" (111 mm)
L28
1⁄8" (714 mm) 301⁄2" (775 mm) 301⁄2" (775 mm)
FRAMING DIMENSIONS
M52
3⁄8" (1330 mm) 541⁄2" (1384 mm) 575⁄8" (1464 mm)
N 37" (940 mm) 381⁄2" (978 mm) 403⁄4" (1035 mm)
O27
1⁄8" (689 mm) 28" (711 mm) 301⁄4" (768 mm)
P15
5⁄8" (397 mm) 155⁄8" (397 mm) 155⁄8" (397 mm)
Q33
1⁄2" (850 mm) 371⁄2" (946 mm) 411⁄2" (1054 mm)
R35
7⁄8" (913 mm) 383⁄4" (978 mm) 383⁄4" (978 mm)

CFDV Series Gas Fireplace
820306739
72"
(1828 mm)
Minimum
6"
(152 mm)
Minimum
Ceiling
Side Wall
CLEARANCES
CLEARANCES TO COMBUSTIBLES
WARNING
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.
Figure 5 –
Ceiling and Side Wall Clearances FP3012
MANTEL CLEARANCES
NOTE: The combustible area above the facing must not
protrude more than 3/4" (19 mm) from the facing. If it
does, it is considered a mantel and must meet the mantel
requirements listed in this manual.
FIREPLACE LOCATION
Plan for the installation of your appliance. This includes
determining where the unit is to be installed, the vent con-
figuration 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
codeagencytoensure compliance with localcodes,includ-
ing permits and inspections.
The following factors should be taken into consideration:
• Clearancetoside-wall,ceiling,woodwork,andwindows.
Minimum clearances to combustibles must be main-
tained.
• This fireplace may be installed along a wall, across a
corner, or use an exterior chase. Refer to Figure 4 for
suggested locations.
• Location should be out of high traffic areas and away
fromfurnitureand draperies dueto heat fromappliance.
• 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.
• Theseunitscan be installedin a bedroom.SeeNational
Fuel Gas Code ANSI Z233.1/NFPA 54 — (current
edition), the Uniform Mechanical Code — (current edi-
tion), and Local Building Codes for specific installation
requirements.
Figure 4 –
Locating Gas Fireplace
Y
EAB
C
D
F
B
** Island (C) and room divider (D) installation is possible as long as the
horizontal portion of vent system (X) does not exceed 20' (6 m).
* When you install your fireplace in (D) room divider or (E) flat on wall
corner positions (Y), a minimum of 6" (102 mm) clearance must be
maintained from perpendicular wall and front of fireplace.
AFlat on Wall
BCross Corner
CIsland**
DRoom Divider*
EFlat on Wall Corner*
FChase Installation

CFDV Series Gas Fireplace
20306739 9
Finish Wall
Header
Stud
Standoffs
Top of Heat
Exhaust Vent
FP3000
Side View
WARNING
Never obstruct or modify the air inlet.
This may create a fire hazard.
12” (305 mm)
8” (203 mm)
6” (152 mm)
256O”
(64 mm)
12”
(305 mm)
11”
(279 mm) 10”
(254 mm)8” (203 mm)
6"
5"
3" 45°
1"
256O”156O”356O”456O”
Figure 6 –
Mantel Clearances
Front View
Side of Fireplace
Opening
Stud
Wall
FP3013
Combustible
Material Area
FIREPLACE INSTALLATION
Figure 7 –
Securing Fireplace to Floor and Framing Studs
SECURE FIREPLACE TO FLOOR OR
FRAMING
Thefireplacemustbe secured to thefloorand/orto framing
studs as shown in Figure 7. Use two (2) wood screws or
masonry/concrete screws to secure fireplace to the floor.
Usefour (4)screws to attach fireplace toframing.The side
nailing flanges are 1⁄2" or 5⁄8" to accommodate different wall
thickness.
FINISHING MATERIAL
NOTE: Any wiring (i.e. remote control, wall switch, and
optional fan) must be done prior to final finishing to avoid
costly reconstruction.
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
minimumadhesive maybe usedto attachfacing 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.
Framing
Nailing
Flange
Screws
Finished Wall
Support Tabs
(Do Not Use for
Framing or Header)
Screw
Nailing
Flange
Screw Screw
Nailing
Flange
Screw
Framing

CFDV Series Gas Fireplace
10 20306739
VENTING INSTALLATION
OPTIONAL TOP VENT APPLICATION
The appliance is shipped as a rear vent unit. If the installa-
tion layout requires the unit to be a top vent configuration
the appliance can be converted by following the steps
below.
Whenremoving andrefitting theplates besure theassoci-
ated gaskets are undamaged and refitted as required.
1. Remove the rear plate by removing one (1) screw. Set
aside. Figure 8
2. Remove the plate with the 7" collar and gasket by re-
moving eight (8) screws. Set aside. Figure 9
Remove
Screws
Remove
Screws
7" Collar
FP3022
Figure 9 –
Remove 7" Collar and Gasket
3. Remove the plate with the 4" collar and gasket by re-
moving four (4) screws. Set aside. Figure 10
4. Remove the top plate located on top of the unit by re-
moving one (1) screw. Set aside. Figure 10
Figure 10 –
Remove 4" Collar and Gasket and Top Plate
Remove
Screws
Remove
Screws
4" Collar
FP3023
Remove
Screw
Top Plate
5. Remove one (1) screw to remove the inner top plate
located on top directly beneath the plate just removed.
Break away the 7" circle using a screwdriver and rein-
stall. Figure 11
Figure 11 –
Remove Circle Section from Inner Top Plate
Remove Circle
FP3024
Inner Top Plate
FP3025
Screw
Rear Plate
FP3021
Figure 8 –
Remove Rear Plate

CFDV Series Gas Fireplace
20306739 11
VENTING INSTALLATION
6. Removethe large squareplate andgasket by removing
the eight (8) screws. Set aside. Figure 12
Remove
Screws
Large Square
Plate
FP3026
Figure 12 –
Remove Large Square Plate and Gasket
7. Removethe small squareplate and gasketbyremoving
four (4) screws. Set aside. Figure 13
Remove Screws
Small
Square
Plate
FP3027
Figure 13 –
Remove Small Square Plate and Gasket
8. Installthe plate andplateswith collars removed inSteps
1-3 in reverse order onto the top of the unit. Install the
top plate and large and small plates in reverse order
into back of unit. Figure 14.
Figure 14 –
Completed Top Vent Conversion
FP3028

CFDV Series Gas Fireplace
12 20306739
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.
Onlya qualified installer/service personshould install vent-
ing 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 vent-
ing system:
•Installation of any damaged venting component.
•Unauthorized modification of the venting system.
•Installation of any component part not manufactured
or approved by Vermont Castings Group.
•Installation other than permitted by these instruc-
tions.
VENTING INSTALLATION
WARNING
Read all instructions completely and
thoroughly before attempting installation.
Failure todo socould result inserious injury,
property damage or loss of life. Operation
of improperly installed and maintained
venting systemcould resultin serious injury,
property damage or loss of life.
NOTICE
Failure to follow these instructions will
void the warranty.
Do not pack the open air spaces with
insulation or other materials. This could
cause high temperatures and may present
a fire hazard.
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
GENERAL VENTING
Your fireplace is approved to be vented either through the
side wall, or vertical through the roof.
•Only Vermont Castings Group venting components
specifically approved and labeled for this fireplace
may be used.
•Flexible UL1777 listed venting may be used in any vent-
ing application where rigid direct vent components can
be used. All restrictions, clearances and allowances that
pertain to the rigid piping apply to the flexible venting.
Flex kits may not be modified. Flex kits may be added to
the end of a vent run made of rigid vent sections using
pipe manufacturer's approved flex to pipe adapters. This
may occur only if doing so does not violate any of the
venting length, height, routing, horizontal to vertical ratio
requirements or clearance considerations detailed in this
manual.
•Venting terminals shall not be recessed into a wall or sid-
ing.
•Select the amount of vertical rise desired. All horizontal
run of venting must have 1/4" rise for every 12" (305 mm)
of run towards the termination below 71/2feet of vertical
rise. With 71/2feet (2.3 m) or more vertical rise off top of
fireplace, the horizontal run may run level. NEVER run
vent piping downward.
•Horizontal venting which incorporates the twist lock pipe
must be installed on a level plane without an inclining or
declining slope.
•Horizontal venting which incorporates the use of flex
venting shall have an inclining slope from the unit of 1"
(25 mm) per 24" (610 mm).
There must not be any obstruction such as bushes, gar-
den sheds, fences, decks or utility buildings within 24"
(610 mm) from the front of the termination hood.
Do not locate termination hood where excessive snow or
ice build up may occur. Be sure to check vent termina-
tion area after snow falls, and clear to prevent accidental
blockage of venting system. When using snow blowers,
make sure snow is not directed towards vent termination
area.
Location of Vent Termination
It is imperative the vent termination be located observing
the minimum clearances as shown on following page.

CFDV Series Gas Fireplace
20306739 13
VENTING INSTALLATION
V
X
X
X
D
E
B
B
B
C
B
M
B
A
J K
F
L
VENT TERMINATION AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
H
I
Fixed
Closed
Operable
Operable Fixed
Closed
B
INSIDE
CORNER DETAIL
A
G
CFM145a
V
V
V
VV
VV
V
TERMINATION LOCATION
1 In accordance with the current CSA-B149 Installation Codes
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel
Gas Codes
† A vent shall 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 2 sides beneath the floor.
NOTE: 1. Local codes or regulations may require different
clearances.
2. The special venting system used on Direct Vent
Fireplaces are certified as part of the appliance, with
clearances tested and approved by the listing agency.
3. Vermont Castings Group assumes no responsibility for
the improper performance of the appliance when the venting
system does not meet these requirements.
Figure 15 –
Termination Locations
CANADIAN INSTALLATIONS1US INSTALLATIONS2
A = Clearance above grade, veranda, porch,
deck or balcony 12" (30cm) 12" (30cm)
B = Clearance to window or door that may be
opened 6" (15cm) for appliances <10,000 BTU/h (3kW)
12" (30cm) for appliances >10,000 BTU/h
(3kW) and <100,000 BTU/h (30kW)
36" (91cm) for appliances >100,000 BTU/h
(30kW)
6" (15cm) for appliances <10,000 BTU/h
(3kW)
9" (23cm) for appliances >10,000 BTU/h
(3kW) and <50,000 BTU/h (15kW)
12" (30cm) for appliances >50,000 BTU/h
(15kW)
C = Clearance to permanently closed window 12" (305mm) recommended to prevent
window condensation 12" (305mm) recommended to prevent window condensation
D = Vertical clearance to ventilated soffit
located above the terminal within a hor-
izontal distance of 2' (610 mm) from the
center line of the terminal
18" (458mm) 18" (458mm)
E = Clearance to unventilated soffit 12" (305mm) 12" (305mm)
F = Clearance to outside corner see next page see next page
G = Clearance to inside corner see next page see next page
H = Clearance to each inside of center line
extended above meter/regulator assembly 3' (91cm) within a height of 15' (5m) above the meter/regulator assembly 3' (91cm) within a height of 15' (5m) above the meter/regulator assembly
I = Clearance to service regulator vent outlet 3' (91cm) 3' (91cm)
J = Clearance to non-mechanical air supply
inlet to building or the combustion air inlet
to any other appliance
6" (15cm) for appliances <10,000 BTU/h
(3kW)
12" (30cm) for appliances >10,000 BTU/h
(3kW) and <100,000 BTU/h (30kW)
36" (91cm) for appliances >100,000 BTU/h
(30kW)
6" (15cm) for appliances <10,000 BTU/h
(3kW)
9" (23cm) for appliances >10,000 BTU/h
(3kW) and <50,000 BTU/h (15kW)
12" (30cm) for appliances >50,000 BTU/h
(15kW)
K = Clearance to mechanical air supply inlet 6' (1.83m) 3' (91cm) above if within 10' (3m) horizontally
L = Clearance above paved sidewalk or
paved driveway located on public property 7' (2.13m)†7' (2.13m)†
M = Clearance under veranda, porch, deck or
balcony 12" (30cm)‡12" (30cm)‡

CFDV Series Gas Fireplace
14 20306739
VENTING INSTALLATION
Outside Corner
Inside Corner
G =
Combustible
6" (152 mm)
Noncombustible
2" (51 mm)
F =
Combustible
6" (152 mm)
Noncombustible
2" (51 mm)
G
Balcony -
with no side wall
M =
Combustible &
Noncombustible
12" (305 mm)
M
Balcony -
with perpendicular side wall
M = 12" (305 mm)
P = 6” (152 mm)
M
F
Alcove Applications*
CDC
E
V
V
Combustible &
Noncombustible
E= Min. 2” (51 mm) for
non-vinyl sidewalls
Min. 12” (305 mm) for
vinyl sidewalls
O= 8’ (2.4 m) Min.
O
P
V
V
V
584-15
DMin. = Number of Termination caps x 3
CMax. = (2 / Number termination caps) x DActual
*NOTE: Termination in an alcove space (spaces open only on one side
and with an overhang) is permitted with the dimensions specified for
vinyl or non-vinyl siding and soffits. 1. There must be a 3' (914 mm) min-
imum between termination caps. 2. All mechanical air intakes within 10'
ASSEMBLING VENT PIPE
Only venting components manufactured or approved by
Vermont Castings Group may be used in Direct Vent sys-
tems.
USA Installations
The venting system must conform to local codes and/or
the current National Fuel Code ANSI Z223.1/NFPA54.
Canadian Installations
The venting system must be installed in accordance with
the current CSA-B149.1 installation code.
FLEX VENT PIPE
Secure flex vent pipe in place with a hose clamp (provid-
ed).
• Be sure the flex pipe overlaps at least 1" (25 mm) onto
the collars of the fireplace and termination. If the ter-
mination has an internal bead, be sure to overlap and
secure 1" (25 mm) past the bead.
• Tighten flex clamp to flex pipe so it is tight to collar and
cannot slip off.
•Apply a tug to be sure the vent will not slip off the col-
lars.
• Repeat process with 7" flex vent pipe. The same pro-
cedure must be performed on the vent side.
Hose Clamp
FP2290
Figure 17 –
Secure Flex Vent Pipe with Hose Clamps.
Figure 16 –
Termination Clearances
(1 m) of a termination cap must be a minimum of 3' (914 mm) below the
termination cap. 3.All gravity air intakes within 3' (914 mm) of a termina-
tion cap must be a minimum of 1' (305 mm) below the termination cap.
TERMINATION CLEARANCES
Termination clearances for buildings with combustible and non-combustible exteriors.
No. of
Caps DMIN.CMAX.
1 3' (914 mm) 2 x DACTUAL
2 6' (1.8 m) 1 x DACTUAL
3 9' (2.7 m) 2/3 x DACTUAL
4 12' (3.7 m) 1/2 x DACTUAL

CFDV Series Gas Fireplace
20306739 15
TWIST LOCK PIPE
When using twist lock pipe it is not necessary to use seal-
ant on the joints.
To join twist lock pipes together, simply align the beads of
the male end with the grooves of the female end, twisting
the pipe until the flange on the female end contacts exter-
nal flange on the male end. It is recommended that you
secure the joints with three (3) sheet metal screws, how-
ever, this is not mandatory with twist lock pipe. Figure 18
NOTE: Sealant is not required to assemble fireplace
venting. Do not use silicone sealant at the inner flue
exhaust connections.
To make it easier to assembly the joints, we suggest put-
ting a lubricant (Vaseline or similar) on the male end of the
twist lock pipe prior to assembly.
Male End Female End
Screw Holes
TWL100
Figure 18 –
Twist-lock Pipe Joints
VENTING INSTALLATION
REAR VENT INSTALLATION ONLY
Install the 4" (102 mm) inner vent pipe to the appliance
inner collar and secure with three (3) stainless steel sheet
metal screws. Figure 19. Install the 7" (178 mm) outer
vent pipe to the appliance outer collar. Secure pipe to the
rear cover plate using the tabs and three (3) sheet metal
screws. Figure 20. If a 45° or 90° elbow is being used, at-
tach the elbow to the appliance in the same manner then
attach the venting to the elbow.
Sheet Metal
Screws
4" Inner
Pipe
Figure 20 –
Install 7" Outer Vent Pipe
FP3001a
Figure 19 –
Install 4" Inner Vent Pipe
FP3031
Sheet Metal Screw
7" Outer
Pipe

CFDV Series Gas Fireplace
16 20306739
HOW TO USE THE VENT GRAPH
The Vent Graph should be read in conjunction with the
following vent installation instructions to determine the re-
lationship 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 Side wall Vent Graph, Figure 21, lo-
cate 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 fire-
place in accordance with same.
EXAMPLE A:
If the vertical dimension from the floor of the unit is 11' (3.4
m) the horizontal run to the face of the outer wall must not
exceed 14' (4.3 m).
EXAMPLE B:
If the vertical dimension from the floor of the unit is 7' (2.1
m), the horizontal run to the face of the outer wall must not
exceed 8' (2.4 m).
Refer to Page 23 for snorkel requirements.
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
2 4 6 8 101214161820
eg: A
X
Vertical Dimension from the Floor of Unit to the Center of
the Horizontal Vent Pipe
Horizontal Dimension From the Outside of Termination to
the Back of the Fireplace
Figure 21 –
Side Wall Venting Graph
X = 22" minimum for 33" Model
X = 251⁄4" minimum for 36" Models
(Floor to center of horizontal pipe)
VENTING INSTALLATION

CFDV Series Gas Fireplace
20306739 17
3" 1"1"
1"
VENTING INSTALLATION
Figure 22 –
Combustible Clearances for Vent Pipe
A Minimum of 3" (76
mm) Clearance to the
Top Is Required Along
Horizontal Length until
Flue Pipe Penetrates
Outside Wall.
A Minimum 1" (25
mm) Clearance
to Combustibles
Permitted All Around
Flue at Outside Wall
VENT PIPE CLEARANCES
Rear Wall Vent: Horizontal sections of this
vent system require a minimum of 3" (76
mm) clearances to combustibles at the top
of the flue and 1" (25 mm) 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
Rear/Top Vent Vertical Side wall: Horizontal
sections of this vent system require a
minimum of 3" (76 mm) clearances to
combustibles at the top of the flue and 1"
(25 mm) 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. If
verticalrise is 71/2feet(2.3 m) orhigher when
top venting, the clearance to combustibles
is 1" on all sides of the horizontal run.
WARNING
1"
3" 1"1"
A Minimum of 3" (76 mm)
Clearance to the Top Is
Required Along Horizontal
Length until Flue Pipe
Penetrates Outside Wall.
A Minimum 1" (25
mm) Clearance
to Combustibles
Permitted All Around
Flue at Outside Wall
FP3018
FP3017
Rear Vent Top Vent
All vertical sections of this vent system
require a minimum of 1" (25 mm) clearance
to combustibles on all sides of the pipe.
WARNING

CFDV Series Gas Fireplace
18 20306739
REAR WALL VENT 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.
•Only Vermont Castings Group approved venting com-
ponents are approved to be used in these applications
(Refer to ‘Venting Components’ listed for different in-
stallation requirements).
•The maximum horizontal distance between the rear of
the appliance (or end of the transition elbow in a cor-
ner application) and the outside face of the rear wall is
20" (508 mm). Figure 23
•Only one 45° elbow is allowed in these installations.
•Minimum clearances between vent pipe and combus-
tible materials are as follows:
Top – 3" (76 mm), except at outside wall 1" (25 mm)
Sides – 1" (25 mm)
Bottom – 1" (25 mm)
20”
(508 mm)
Max.
20”
(508 mm)
Max.
Rear Vent Top View
Figure 23 –
Rear Vent Application, No Elbows
REAR WALL VENT INSTALLATION – TWIST
LOCK PIPE
Step 1
Locate and cut the vent opening in the wall.
For combustible walls first frame in opening. Figure 24
NOTE: When using flex vent, the opening will have to be
measured according to the 1" (25 mm) rise in 24" (610
mm) vertical run.
Combustible Walls: Cut a 95⁄8" H x 95⁄8" W (244 x 244
mm) hole through the exterior wall and frame as shown.
Figure 24
Noncombustible Walls: Hole opening should be 71⁄2"
(191 mm) diameter.
Step 2
Secure firestop to the inside frame, center in the 95⁄8" x
95⁄8" vent opening.
Step 3
Measure the horizontal length requirement for the venting
including a 2" (51 mm) overlap, i.e. from the elbow to the
outside wall face plus 2" (51 mm). Figure 25
Step 4
Install the 4" (102 mm) vent to the appliance collar and
secure with 3 sheet metal screws. Install the 7" (178 mm)
vent pipe to the appliance collar and secure with 3 sheet
metal screws. It is not necessary to seal this connection.
If a 45° elbow is being used attach the elbow to the appli-
ance in the same manner then attach the venting to the
elbow. It is critical that there is no downward slope
away from the appliance when connecting
the vent or elbow.
Step 5
Guide the venting through the vent hole as you place the
appliance in its installed position. Guide the 4" (102 mm)
and 7" (178 mm) collar of the vent termination into the
outer ends of the venting. Do not force the termination. If
the vent pipes do not align with the termination, remove
and realign the venting at the appliance flue collars. Fig-
ure 25.Attach the termination to the wall as outlined in the
instruction sheet supplied with the termination.
VENTING INSTALLATION
Vent Opening for Combustible Walls
95⁄8"
(244 mm)
Min.
Fireplace Hearth Framing Detail
Opening for Noncombustible Wall
71⁄2"
(190 mm)
Fireplace Hearth FP2293
Figure 24 –
Locate vent opening on wall
95⁄8"
(244 mm) Min.
FP3002

CFDV Series Gas Fireplace
20306739 19
VENTING INSTALLATION
Figure 25 –
Side View of Final Unit Location
REAR WALL VENT INSTALLATIONS –
FLEX VENT PIPE
Follow Steps 1 and 2 on Page 18.
Step 3
Install the 4" (102 mm) flex vent pipe to the appliance col-
lars described in “General Information Assembling Vent
Pipes,” Page 14. If the installation requires a 45° angle,
grasp the vent pipe close to the appliance collar and bend
to 45°. DO NOT exceed 45°. Figure 26
Install the 7" vent pipe in the same manner as Step 2.
NOTE: There must be a 1⁄2" (13 mm) rise in a 12" (305
mm) length of flex vent.
Step 4
Assemble the flex vent to the collars on the termination as
you did on the appliance.
Figure 26 –
Grasp the vent pipe close to the collar and end to 45°
angle. Do not exceed 45°.
Rise
FP1472
Figure 27 –
There must be a 1/2" rise per foot length
TOP VENT SIDE WALL APPLICATION
Since it is very important that the venting system
maintain its balance between the combustion air in-
take and the flue gas exhaust, certain limitations as
to vent configurations apply and must be strictly ad-
hered to.
The Vent Graph, showing the relationship between verti-
cal and horizontal side wall venting, will help to determine
the various dimensions allowable.
Minimum clearance between vent pipes and combus-
tible materials is 3" (76 mm) on top, and 1" (25 mm) on
the bottom and sides unless otherwise noted.
When vent termination exits through foundations less
than 20" (508 mm) below siding outcrop, the vent pipe
must flush up with the siding.
It is best to locate the fireplace in such a way that mini-
mizes 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.
Horizontal plane means no vertical rise exists on this por-
tion of the vent assembly.
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 cri-
teria and calculations, and unless specifically men-
tioned should be ignored when calculating venting
layouts.
• The maximum number of 90° elbows per side wall in-
stallation is three (3). Figure 28
• If a 90° elbow is fitted directly on top of the fireplace
flange the maximum horizontal vent run before the ter-
mination or a vertical rise is 36" (914 mm). Figure 29
• If a 90° elbow is used in the horizontal vent run (lev-
el height maintained) the horizontal vent length is re-
duced by 36" (914 mm). Figures 30 & 31. This does
not apply if the 90° elbows are used to increase or
redirect a vertical rise. Figure 28
Finish Wall Vent
Termination
FP2294
Firestop
Termination
Flex section
Appliance collars
FP1473
Firestop

CFDV Series Gas Fireplace
20 20306739
Example: According to the vent graph (Page 16) the
maximum horizontal vent length in a system with a 71⁄2'
(2.3 m) rise is 20' (6 m) and if a 90° elbow is required in
the horizontal vent it must be reduced to 17' (5.2 m).
In Figures 30 & 31, dimensionA plus B must not be great-
er than 17' (5.2 m)
• The maximum number of 45° elbows permitted per in-
stallation is six (6). These elbows can be installed in
either the vertical or horizontal run.
• For each 45° elbow installed in the horizontal run, the
length of the horizontal run MUST be reduced by 18"
(457 mm). This does not apply if the 45° elbows are
installed on the vertical part of the vent system.
• The maximum number of elbow degrees in a system is
270°. Figure 32
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total angular variation = 270°
3 x 90°
Elbows 3 x 90°
Elbows
FP1176
Figure 28 –
Maximum three (3) 90° elbows per installation
36"
(914mm)
Max.
36"
(914mm)
Max.
FP1177
Figure 29 –
Maximum horizontal run with no rise
VENTING INSTALLATION
7'6"
(2.3m)
AB
A + B = 17' (Max.)
(5.2m)
FP1178 Figure 30 –
Horizontal Run Reduction
A10'
(3 m)
7'
(2.1 m)
7'6"
(2.3 m)
V584-201
B
Figure 31 –
Maximum Vent Run with Elbows
1
2
3
4
1
2
3
4
1 + 2 + 3 + 4 = 270°
FP1180
Figure 32 –
Maximum Elbow Usage