Vermont Castings VWDV70NTSCSB User manual

VWDV70NTSCSB Direct Vent Gas Fireplace
Installation and Operating Instructions
20306745 12/14 Rev. 1
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for
future reference.
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 for the protection of children and
other at risk individuals.
20306543
• 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 buildling 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 applianceis for useonly with thetype 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.
CERTIFIED
SAFETY BARRIER

220306745
VWDV70 Series Gas Fireplace CONTENTS
Important Safety Information ......................................3
Code Approval ......................................................... 4
Product Features..........................................................5
Product Specifications ............................................. 5
High Elevations ........................................................ 5
Gas Pressures ......................................................... 5
Gas Specifications & Orifice Size ............................ 5
Before You Start....................................................... 5
Firebox Framing....................................................... 5
Fireplace & Framing Dimensions................................6
Pre-Installation Information.........................................7
Fireplace Location.................................................... 7
Cold Climate Insulation ............................................ 7
Clearances ....................................................................8
Clearances to Combustibles .................................... 8
Secure Fireplace to Floor or Framing.........................9
Finishing Material..................................................... 9
Noncombustible Requirements ................................ 10
Noncombustible Facing Installation ....................... 10
Venting Installation.....................................................12
Installation Precautions.......................................... 12
Installation Planning............................................... 13
For Horizontal Termination ..................................... 13
For Vertical Termination ......................................... 13
Installing a Vent System in an Outside Chase ....... 13
General Venting – Termination Location ................ 14
Termination Clearances ......................................... 15
How to Use the Vent Graph ................................... 15
Vertical Sidewall Installation................................... 16
Vertical/Horizontal Termination Configurations ...... 17
Below Grade Installation ........................................ 18
Vertical Through-the-Roof Applications ................. 19
Installation for Vertical Termination ........................ 20
Termination Heights for Vents above Flat or
Sloped Roofs ......................................................... 21
Flex Vent Installation..................................................22
Fireplace Installation..................................................24
Check Gas Type..................................................... 24
Install Gas Piping to Fireplace/Burner System ...... 24
Check Gas Pressure.............................................. 26
Electrical Installation..................................................27
Electrical Wiring ..................................................... 27
Junction Box Wiring ............................................... 27
Command Center Wall Installation......................... 27
Signature Command®System Wiring Diagram ..... 28
Thank you and congratulations on your purchase of a
Vermont Castings Group 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.
Final Installation......................................................... 29
Glass Frame Removal ........................................... 29
Bulb Replacement.................................................. 29
Porcelain Panels .................................................... 29
Glass & Stone Placement ...................................... 30
Accessory Log Installation ..................................... 31
Safety Barrier Installation Instructions ................... 32
Signature Command®System Operating
Instructions ..........................................................35
For Your Safety Read Before Lighting ................... 35
Operating Instructions............................................ 36
To Turn Off Gas to Appliance ................................. 36
Features................................................................. 37
Battery Installation ................................................. 37
System Configuration/Setup .................................. 38
Cold Climate Option............................................... 38
Functions/Operation............................................... 39
Command Center Operations ................................ 39
Self Diagnostics Chart ........................................... 39
Touch Screen Remote Control Operation................40
Fuel Conversion ......................................................... 46
Conversion Instructions ......................................... 46
Testing and Burner Assembly ................................ 48
Cleaning and Maintenance........................................ 49
Burner, Pilot and Control Compartment ................. 49
Pilot Flame ............................................................. 49
Burner .................................................................... 49
Burner Flame ......................................................... 49
Vent System........................................................... 50
Glass Door ............................................................. 50
Stones.................................................................... 50
Troubleshooting .........................................................51
Signature Command®System ............................... 51
Replacement Parts..................................................... 52
Firebox Components and Accessories .................. 52
Signature Command System and Engine.............. 53
Glass...................................................................... 55
Stones.................................................................... 55
Venting Components.................................................. 56
Vent Components for 5"x*8" Pipe .......................... 56
Massachusetts Residents Only.................................58
Limited Lifetime Warranty .........................................59
Efficiencies.................................................. Back Cover

20306745 3
VWDV70 Series Gas Fireplace
• where curtains, furniture, clothing, or other flam-
mable objects are less than 42" from the front, top,
or sides of the fireplace
• in high traffic areas
• in windy or drafty areas
5. This fireplace reaches high temperatures. Keep chil-
dren 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
circulating 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 quali-
fied service person. If needed, have venting system
cleaned or repaired. Refer to Cleaning and Mainte-
nance, Page 42.
11. 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
or stored. Do not place items such as clothing or dec-
orations on or around fireplace.
12. Do not use this fireplace to cook food or burn paper or
other objects.
13. Never place anything on top of fireplace.
14. Do not use any solid fuels (wood, coal, paper, card-
board, etc.) in this fireplace. Use only the gas type
indicated on rating plate.
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 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
this manual for reference. It is your guide to safe and proper
operation of this fireplace.
1. This appliance is only for use with the type of gas
indicated on the rating plate. This appliance is not
convertible for use with other gases unless a certified
kit is used.
2. For propane/LP fireplace, do not place propane/LP
supply tank(s) inside any structure. Locate propane/
LP supply tank(s) outdoors. To prevent performance
problems, do not use propane/LP fuel tank of less than
100 lbs. capacity.
3. If you smell gas
• shut off gas supply.
• do not try to light any appliance.
• do not touch any electrical switch; do not use any
phone in your building .
• immediately call your gas supplier from a neigh-
bor’s phone. Follow the gas supplier’s instructions.
4. Never install the fireplace
• in a recreational vehicle
INSTALLER
Please leave these instructions with the appliance.
OWNER
Please retain these instructions for future reference .
WARNING
• 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.
• Improperinstallation oruse ofthis fireplace cancause serious injuryor deathfrom fire, burns, explosions,
electrical shock and carbon monoxide poisoning.

420306745
VWDV70 Series Gas Fireplace IMPORTANT SAFETY INFORMATION
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/NFPA70, or the Canadian ElectricalCode,
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 ade-
quate 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 technician to inspect the appliance and replace
any part of the control system and any gas control which
as been submerged in water.
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.
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 Z21.88-2009 / CSA 2.33-2009 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 Recre-
ational Vehicles and Mobile Housing, CSA Z240.4.
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
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.

20306745 5
VWDV70 Series Gas Fireplace
PRODUCT FEATURES
Figure 1 -
VWDV70 Fireplace 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.
•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, CSA 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.
HIGH ELEVATIONS
Input ratings are shown in BTU per hour and are certified
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,
installation must be in accordance with the current ANSI
Z223.1/NFPA 54 and/or local codes having jurisdiction.
In Canada, please consult provincial and/or local authori-
ties having jurisdiction for installation at elevations above
4,500 feet (1,370 m).
GAS PRESSURES
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)
•Reflective Decorative Glass • Conversion Kit
•Stone Set • Wall Switch Kit
ITEMS REQUIRED FOR INSTALLATION
• Phillips Screwdriver • Framing Materials
• Hammer • Wall Finishing Materials
• Saw and/or saber saw • Level
• Measuring Tape • Pliers
• Electric Drill and Bits • Square
• Pipe Wrench • Tee Joint
• Caulking Material (noncombustible)
• Fireplace Surround Material (noncombustible)
• Piping Complying with Local Codes
• Pipe Sealant Approved for use with Propane/LPG
(Resistant to sulfur compounds)
•Noncombustible finishing material or dura-rock*
* Only used if desired to cover painted face other than using tiles or
marble. If tiles or marble are used around the face, the noncombustible
material is not needed.
FIREBOX FRAMING
Firebox framing can be built before or after the appliance
is set in place. Refer to Figure 2 for fireplace and framing
dimensions. The framing headers may rest on the top of the
firebox standoffs. Do not bring headers below top of stand-
offs. NOTE: When planning your framing and installation,
keep in mind that both the gas line and electricity should
come in on the right side of the firebox (as you are facing
the front of the fireplace).
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.
GAS SPECIFICATIONS & ORIFICE SIZE
Max. Min.
Input Input Orifice Sizes
Model Fuel Btu/hr Btu/hr Left Middle Right
VWDV70 Nat. 51,000 32,500 #44 #43 #45
VWDV70 LP 43,000 32,000 1.25 mm 1.20 mm #56
FP2938
Side View
Control Board
A/C Module
Gas Control
Valve
Natural Propane (LP)
Inlet Minimum 4.5" w.c. 11.0" w.c.
Inlet Maximum 10.5" w.c. 13.0" w.c.
Manifold Pressure 3.5" w.c. 10.0" w.c.

620306745
VWDV70 Series Gas Fireplace FIREPLACE AND FRAMING DIMENSIONS
Figure 2 -
Fireplace and Framing Dimensions
WARNING
Do not fill spaces around firebox with
insulation or other materials. This could
cause a fire.
WARNING
Unit framing is to be rectangular front to
back. Failure to do so will cause fire and
damage to property.
456QE” (1151 mm)
10(6”
(276 mm)
906” (2302 mm)
6956O" (1765 mm)
726M” (1848 mm)
816” (2067 mm)
66QE”
(167 mm)
2356”
(587 mm)
176"
(440 mm)
16M”
(45 mm)
66QE”
(167 mm)
4856M"
(1226 mm)
316”
(803 mm)
176M”
(451 mm)
4856O”
(1232 mm) 1456O”
(368 mm)
*9156” (2315 mm) Rough Opening Width
236"
(594 mm)
2356”
(587 mm)
Rough
Opening
Depth
Rough
Opening
Height
906QE” (2294 mm)
63(6”
(1622 mm)
1276M” (3245 mm)
906QE” (2294 mm)
4056O”
(1029 mm)
Unfold standoffs into upright position and fasten into place
using #8 screws provided, three (3) screws per standoff.
Figure 3
Figure 3
FP2931
*NOTE: Critical dimension. Do not exceed
this dimension for mounting noncombusti-
ble wall board. Refer to Page 10.

20306745 7
VWDV70 Series Gas Fireplace
PRE-INSTALLATION INFORMATION
FIREPLACE LOCATION
Plan for the installation of your appliance. This includes
determining where the unit is to be installed, the vent
configuration to be used, framing and finishing details,
and whether any optional accessories (i.e. 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 main-
tained.
•This fireplace may be installed along a wall, across a
corner, or use an exterior chase. See Figure 4 for sug-
gested 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.
NOTE
COLD CLIMATE INSULATION
If you live in a cold climate, seal all cracks
around yourappliance, andwherever coldair
could enter the room, with noncombustible
material. It isespecially 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.
Y
EAB
C
D
F
YB
X
** Island (C) and room divider (D) installation is possible as long
as the horizontal portion of vent system (X) does not exceed
20'. Refer to Installing Horizontal Termination Configuration
on Page 13.
* 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.
A Flat on Wall
B Cross Corner
C Island**
D Room Divider*
E Flat on Wall Corner*
F Chase Installation
Y 4" Minimum
Figure 4 -
Possible Fireplace Locations
NOTE: Refer to cold climate pilot information on Page 38
for more information on standing pilot vs. intermittent pilot
options.
•These units can be installed in a bedroom. Refer to
the National Fuel Gas Code ANSI Z233.1/NFPA 54
— (current edition), the Uniform Mechanical Code —
(current edition), and Local Building Codes for specific
installation requirements.
•These units can be installed in a bathroom.
COLD CLIMATE OPTION
Your fireplace is equipped with an intermittent pilot ignition
(IPI) control. An IPI control with a standing pilot option
provides the dual benefit of an economical and environ-
mentally 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 comparison, 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 fi
replace, units operating in colder 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 this
issue, your fireplace has been designed with a cold cli-
mate pilot option, which, when active, maintains a warmer
temperature inside your firebox to make ignition 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 cold climate mode:
1. Holding the ON button the Command Center while
turning on the master switch. This action will toggle
between the standing (cold climate) pilot and intermit-
tent pilot.
2. After performing the above operation, a confirmation
beep will sound (one beep for standing pilot) or two
beeps (for intermittent pilot).

820306745
VWDV70 Series Gas Fireplace CLEARANCES
6”
5”
3”456O”
45°
1”
356O”
156O”
256O”
FP2930
Side of
Fireplace Opening
Figure 6 -
Mantel clearances
Top View
CLEARANCES TO COMBUSTIBLES
Follow these instructions carefully to
ensure safe installation. Failure to follow
instructions exactly can create a fire hazard.
Theappliancecannotbeinstalledonacarpet,
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
12”
(305 mm)
12” (305 mm)
Wall
Stud
Standoff
Top of Fireplace
Opening
FP2929
Side View
Noncombustible
Material (Supplied)
Figure 5 -
Ceiling and Sidewall Clearances
FP2928
12“ (305 mm)
Max. Depth
12” Min.
From Opening
956O”
(241 mm)
30” (762 mm)
Min. to Ceiling
NOTE: Refer to mantel installation instructions
on Page 11.

20306745 9
VWDV70 Series Gas Fireplace
The fireplace must be secured to the floor and/or to framing studs as shown in Figure 7. 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.
SECURE FIREPLACE TO FLOOR OR FRAMING
Framing Members
FP2932
Figure 7 -
Secure Fireplace to Framing Studs
NOTE
Never install combustible materials over
front face of fireplace or in noncombustible
zone shown below.
FINISHING MATERIAL
NOTE: Any wiring 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 up the black face up to the fireplace glass door
opening. It is permissible to bring combustible wall board
to the top of the standoffs on the top and the sides of the
unit. A 300°F minimum adhesive may be used to attach
facing materials to noncombustible surface.
Nailing Flanges
Noncombustible
Material (Supplied)
Noncombustible
Material
Noncombustible
Material Supplied
Must be used to
create Four (4) Sides
NOTE
Fireplace may be installed on top of fram-
ing or platform constructed of combustible
materials which do not protrude beyond
the face.
If the unit is being installed in a bare painted
wall without finishing materials (i.e. brick,
tile, slate, marble, etc.), a Vermont Cast-
ing accessory face MUST be used (VWD-
V70CSS, VWDV70BT, VWDV70IA, etc.).
The supplied noncombustible board shown in
Figure 6 MUST be used for ALL installations.
IMPORTANT

10 20306745
VWDV70 Series Gas Fireplace NONCOMBUSTIBLE REQUIREMENTS
NONCOMBUSTIBLE FACING INSTALLATION
CAUTION: The noncombustible wall board supplied with
this unit can be damaged if dropped or struck. Handle
with care.
1. Using drywall screws secure noncombustible board to
framing and top nailing strip. Attach every 6" (152 mm).
Figures 8 & 9
IMPORTANT: To avoid cracking the board, pre-drill
holes prior to securing to unit/framing.
2. Wipe any debris or dust from the noncombustible board
and drywall.
3. It is highly recommended to prime the facing using a
quality primer prior to taping and mudding. This will
ensure proper adhesion of both the tape and mud. The
supplied board is very porous.
506QE”
(1284 mm)
656M”
(159 mm)
2356QE”
(608 mm)
92” (2337 mm)
Wall Board
3(6” (98 mm)
76M” (197 mm)
656M”
(159 mm)
10”
(254 mm)
33”
(838 mm)
176QE”
(446 mm)
*9156” (2315 mm)
Header Framing
Outline of
Face
FP2939
Figure 8
4. Tape the seams using a mesh type tape.
5. Mud seams as normal. We recommend using a product
called Durabond high strength compound for the first
coat. This product can be purchased at any hardware
store. Follow manufacturer's recommendations for
curing the mud.
NOTE: Depending upon the final finishing method, use a
minimum rated 300 degree sealant, drywall compound
or thin set to seal the side and top joints.
6. Prime wall for a second time for proper adhesion of
paint.
*Do Not Exceed This Dimension

20306745 11
VWDV70 Series Gas Fireplace
9" (229 mm)
Spacing
9"
2" (51 mm)
from edge
1 1/2" (38 mm)
from edge
#8 x 3/4" Self-tapping
Screws (supplied)
Figure 9
NONCOMBUSTIBLE REQUIREMENTS
NOTE: Use this illustration as a guide when attaching the noncombustible boards to the structural framing. Use the #8
x 3/4" self-tapping screws provided.
Metal Framing
Maintain 161⁄2"
(419 mm) to
Combustible Framing
FP2941
Figure 10
If a mantel will be installed and the attachment points fall upon the noncombustible surface above the glass frame opening,
a suitable structure must be added in order to support the weight of the mantel. A framework of metal studs as shown in
Figure 10 is suggested. The two (2) front stand-offs on top of the unit will need to be removed.

12 20306745
VWDV70 Series Gas Fireplace
INSTALLATION PRECAUTIONS
Consult local building codes before beginning the
installation. The installer must make sure to select the
proper vent system for installation. The approved 5 x 8
venting components are Duravent and Selkirk products
listed on Page 49. UL1777 flexible venting is also
approved for use on these models. Before installing vent
kit, the installer must read this fireplace manual and vent
kit instructions.
Only a qualified installer/service person should 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 war-
ranty 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
Vermont Castings Group.
• Installation other than permitted by
these instructions.
VENTING 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
Figure 11 -
Combustible Clearances for Vent Pipe
* A minimum 3" clearance to combustibles permitted all around flue at
outside wall.
** A minimum of 3" clearance is required above the pipe along
horizontal run until terminated through the wall.
NOTICE
Failure to follow these instructions will
void the warranty.
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
WARNING
Horizontal sections of this vent system
require a minimum of 3" clearance to
combustibles on top of horizontal run until
terminated through the wall and 1" on all
sides. Vertical sections of this vent system
require 1" clearance around all sides.
*1”
(25 mm)
**3”
(76 mm)
36" (914 mm)
Vertical Rise
Required Before
Horizontal Run
FP2933
84" (2134 mm)
Minimum, Base
of Fireplace to
Centerline of Vent
Pipe

20306745 13
VWDV70 Series Gas Fireplace
VENTING 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 below 71⁄2" feet of vertical rise from the floor
of the fireplace. With 71⁄2" feet or more vertical rise from
the floor of the fireplace, the horizontal run may run level.
NEVER run vent piping down.
You may use up to three 90° elbows in this vent configura-
tion. Refer to Vertical/Horizontal Termination Configurations
on Page 15.
FOR VERTICAL TERMINATION
Measure the distance from the fireplace floor to the ceil-
ing. 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°.
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.
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
Never run the vent pipe level down. This
may cause excessive temperatures which
could cause a fire.
WARNING
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.
Refer to Installing A Vent System in an Outside 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.
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
verticalriseis71/2feet (2.3m) or higher when
top venting, the clearance to combustibles
is 1" on all sides of the horizontal run.
WARNING

14 20306745
VWDV70 Series Gas Fireplace VENTING INSTALLATION
GENERAL VENTING INFORMATION - TERMINATION LOCATION
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
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 12 –
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)‡

20306745 15
VWDV70 Series Gas Fireplace
VENTING INSTALLATION
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 fire-
place in accordance with same.
Example: If the vertical dimension from the base of the
fireplace is 11' (3.4 m) the horizontal run to the face of
the outer wall must not exceed 16' (4.9 m).
Sidewall Vent Graph showing the relationship between
vertical and horizontal dimensions for a Direct Vent flue
system. Figure 14 -
Rear Wall Venting Graph
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
Vent run must not
be in shaded area
Horizontal dimension from the finished outside wall
to the center of the pipe on the fireplace
Vertical Dimension from the Base of Unit
to the Center of the Horizontal Vent Pipe
Dimensions in Feet
84" (2134 mm)
From Floor to
Center
*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) minimum between termination caps. 2. All mechanical air intakes within 10’ (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 termination cap must be a minimum of 1’ (305 mm) below the termination cap.
Figure 13 -
Termination Clearances
TERMINATION CLEARANCES
Termination clearances for buildings with combustible and non-combustible exteriors.
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*
C D C
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
DMin. = Number of Termination caps x 3
CMax. = (2 / Number termination caps) x DActual
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

16 20306745
VWDV70 Series Gas Fireplace VENTING INSTALLATION
VERTICAL SIDEWALL INSTALLATION
Step 1
Locate vent opening on the wall. It may be necessary to
first position the fireplace and measure to obtain hole lo-
cation. Depending on whether the wall is combustible or
noncombustible, cut opening to size. Figure 15 (For com-
bustible walls first frame in opening.)
Combustible Walls: Cut a 101⁄2"H x 101⁄2"W (267 x 267
mm) hole through the exterior wall and frame as shown.
Figure 15
Noncombustible Walls: Hole opening must be 81⁄2" (216
mm) in diameter.
Vent Opening for Combustible Walls
101⁄2"
(267 mm)
Min.
Fireplace Hearth Framing Detail
Opening for Noncombustible Wall
81⁄2"
(216 mm)
Fireplace Hearth
FP2293
Figure 15 -
Locate vent opening on wall
101⁄2"
(267 mm) Min.
Step 2
Secure firestop to the inside frame, center in the 101⁄2" x
101⁄2" vent opening.
Step 3
Place fireplace into position. Measure the vertical height
(X) required from the base of the flue collars to the center
of the wall opening. Figure 16
Step 4
Using appropriate length of pipe section(s) attach to fire-
place with three (3) screws. Follow with the installation of
the elbow.
Step 5
Measure the horizontal length requirement figuring a 11⁄4"
(32 mm) overlap, i.e. from the elbow to the outside wall
cap. Figure 17
X
Figure 16 -
Vertical Height Requirement
FP1181
Figure 17 -
Horizontal Length Requirement
X
FP1182
Step 6
Use appropriate length of pipe sections — telescopic or
fixed — and install.
Sealing vent pipe and firestop gaps with high tem-
perature sealant will restrict cold air being drawn in
around fireplace.
Step 7
Guide the vent terminations 5" and 8" collard into their
respective vent pipes. Double check that the vent pipes
overlap the collars by a minimum 11⁄4" (32 mm). Secure
the termination to the wall with screws provided and caulk
around the wall plate to weatherproof. As an alternative to
screwing the termination directly to the wall, you may also
use expanding plugs or an approved exterior construction
adhesive.
Always install horizontal venting on a level
plane. Support horizontal pipes every 36" (914 mm)
with metal pipe straps.

20306745 17
VWDV70 Series Gas Fireplace
VENTING INSTALLATION
VERTICAL/HORIZONTAL TERMINATION
CONFIGURATIONS
Since it is very important that the venting system
maintain its balancebetween 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
various dimensions allowable. Figure 14
NOTE: Horizontal and vertical sections of this vent system
require a minimum of 3" (76 mm) clearance to combustibles
on all sides.
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 finished outside wall.
•The maximum number of 90° elbows per side wall
installation is three (3). Figure 18
•A minimum of 36" (914 mm) is required before a 90°
elbow. Figure 19
Figure 18 -
Maximum Three (3) 90° Elbows Per Installation
3 x 90°
Elbows
36" (914 mm)
Min.
FP1176
In Figures 20 and 21 dimension A plus B must not be
greater than 17' (5.2 m).
•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 21
Figure 19 -
Maximum Horizontal Run with No Rise
36"
(914 mm)
Max.
FP1177
•If a 90° elbow is used in the horizontal vent run (level
height maintained) the horizontal vent length is reduced
by 36". Refer to Figures20 and21.This does not apply if
the 90° elbows are used to increase or redirect a vertical
rise. Figure 20
Example:According to the vent graph (Page 15) the max-
imum horizontal vent length in a system with a 10' vertical
rise is 171⁄2' (5.3 m) and if a 90° elbow is required in the
horizontal vent it must be reduced to 141⁄2' (4.4 m).
Figure 20 -
Horizontal Run Reduction
A
B
10’
90° Elbow = 3' Reduction
10'
(3 m)
FP2934

18 20306745
VWDV70 Series Gas Fireplace VENTING INSTALLATION
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 21 -
Maximum Elbow Usage
1
2
3
4
36" (914 mm)
Minimum
FP1180
BELOW GRADE INSTALLATIONS
When it is not possible to meet the required vent terminal
clearances of 12" above grade level, a snorkel kit is rec-
ommended. It allows installation depth down to 7" (178
mm) below grade level. The 7" (178 mm) is measured
from the center of the horizontal vent pipe as it penetrates
through the wall.
Ensure that sidewall venting clearances are observed.
If venting system is installed below ground, we recom-
mend awindow well with adequateand proper drainage
to be installed around the termination area.
If installing a snorkel, a minimum 36" (914 mm) vertical
rise is necessary. The maximum horizontal run with the 36”
(914 mm) vertical pipe is 36". This measurement is taken
from the collar of the fireplace (or transition elbow) to the
face of the exterior wall. See the Sidewall Venting Graph
for extended horizontal run if the vertical exceeds 12".
1. Establish vent hole through the wall.
2. Remove soil to a depth of approximately 16" (406 mm)
below base of snorkel. Install drain pipe. Install window
well (not supplied). Refill hole with 12" (305 mm) of
coarse gravel leaving a clearance of approximately 4"
(102 mm) below snorkel. Figure 22
3. Install vent system.
4. Ensure a watertight seal is made around the vent pipe
coming through the wall.
5. Apply high temperature sealant caulking (supplied)
around the 5" and 8" snorkel collars.
6. Slide the snorkel into the vent pipes and secure to the
wall.
7. Level the soil so as to maintain a 4" clearance below
snorkel. Figure 19
Figure 22 -
Below Grade Installation
FP2134
Screws
Minimum
4" Clearance
Ground
Window
Well
Gravel
Drain
Foundation Wall
Firestop
36" (914 mm)
Minimum
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel. Fasten
brackets to wall first, then secure to snorkel with self drilling
#8 x 1⁄2" sheet metal screws. It will be necessary to extend
vent pipes out as far as the protruding wall face. Figure 23
Figure 23 -
Snorkel Installation, Recessed Foundation
Foundation
Recess
Watertight Seal
Around Pipe
Sheet Metal
Screws
Wall Screws
Snorkel
WARNING
•Do not back fill around snorkel.
•A clearance of at least 4" must be
maintained between the snorkel and
the soil.

20306745 19
VWDV70 Series Gas Fireplace
1
2
3
4
VENTING INSTALLATION
VERTICAL (THROUGH-THE-ROOF)
APPLICATIONS
This gas fireplace has been approved for,
•Vertical installations up to 40' (12 m) in height. Up to
a 10' (3 m) horizontal vent run can be installed within
the vent system using a maximum of two 90° elbows.
Figure 24
NOTE: Horizontal and vertical sections of this vent system
require a minimum 1" clearance to combustibles at the top,
sides and bottom.
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
36" (914 mm)
Min.
Figure 25 -
Maximum Elbow Usage
FP1179
•Up to two 45° elbows may be used within the horizontal
run. For each 45° elbow used on the horizontal plane,
the maximum horizontal length must be reduced by 18"
(450 mm).
Example: Maximum horizontal length
No elbows = 10’ (3 m)
1x45° elbows = 8.5’ (2.6 m)
2x45° elbows = 7’ (2.1 m)
•A minimum of a 36" (914 mm) vertical rise is required.
•Two sets of 45°elbows offsets may be used within the
vertical sections. From 0 to a maximum of 8' (2.5 m)
of vent pipe can be used between elbows. Figure 25
•The maximum angular variation allowed in the system
is 270°. Figure 25
40' (12 m)
Maximum
Height
12' (3.7 m)
Minimum
Height
10' (3 m)
Maximum
Support Straps
Every 3'
36" (914 mm)
Min.
FP1183
Figure 24 -
Support Straps for Horizontal Runs

20 20306745
VWDV70 Series Gas Fireplace VENTING INSTALLATION
INSTALLATION FOR VERTICAL TERMINATION
1. Determine the route your vertical venting will take. If
ceiling joist, roof rafters or other framing will obstruct
the venting system, consider an offset. Refer to Figure
26 to avoid cutting load bearing members.
For optimal flame appearance on straight vertical runs of
10 feet (3 m) or higher, the two (2) restrictor sliding plates
on the inside roof of the firebox should be partially closed.
Use the following guidelines as a starting point:
Height of Venting Restrictor Plate Setting
30' to 40' (9.1 to 12.2 m) 1/4 open
20' to 30' (6.1 to 9.1 m) 1/3 open
10' to 20'(3 to 6.1 m) 1/2 open
After initially setting the plate openings, replace glass door
and safety barrier and operate fireplace for at least 15
minutes to observe the flames.
For natural gas, the average flame height should be
approximately 6" to 7" (152 to 178 mm).
For LP gas, the average flame height should be approxi-
mately 4" to 5" (102 to 127 mm).
If the flames are too tall, open plates slightly.
If the flames are too short, close plates slightly.
CAUTION:Allow fireplace to cool completely before touch-
ing or opening the glass door.
•Runs may not incorporate elbows.
NOTE:Pay special attention to these installation instructions
for required clearances (air space) to combustibles when
passing through ceilings, walls, roofs, enclosures, attic
rafters, etc. Do not pack air spaces with insulation. Also
note maximum vertical rise of the venting system and any
maximum horizontal offset limitations. Offsets must fall
within the parameters shown in Figures 25 and 26.
2. Set fireplace in desired location. Drop a line plumb down
from the ceiling to the position of the flue exit. Mark the
center point where the vent will penetrate the ceiling.
Drill a small locating hole a this point.
Drop a plumb line from the inside of the roof to the ceiling
locating hole in the ceiling. Mark the center point where
the vent will penetrate the roof. Drill a small locating
hole at this point.
FLAT CEILING INSTALLATION
1. Cut a 101⁄2" (241 mm) square hole in the ceiling using
the locating hole as a center point The opening should
be framed to 101⁄2" x 101⁄2" (241 x 241 mm) inside
dimensions as shown in Figure28 using framing lumber
the same size as the ceiling joist. If the area above the
ceiling is an insulated ceiling or a room, nail firestop from
the top side. This prevents loose insulation from falling
into the required clearance space. Figure27. Otherwise,
install firestop below the framed hole. Figure 28
Figure 26 -
Offset with Wall Strap and 45° Elbows
Roof Flashing
Wall Strap
45° Elbows
Ceiling Firestop
FP1669
10
1
/
2
"
10
1
/
2
"
Figure 27 - If Area Above is a Room, Install Firestop above
Framed Hole as Shown
Figure 28 - If Area Above is Not a Room, Install Firestop
above Framed Hole as Shown
Firestop
Nails
Nails Firestop FP1970