Vermont Castings WDVST500 Manual
78D2082 3/13 Rev. 6
782082
WDVST cover
278D2082
WDV See-thru Gas Fireplace
High Elevations .......................................................5
Gas Pressures ........................................................5
Gas Specications & Orice Size ...........................5
Before You Start ......................................................5
Fireplace & Framing Dimensions ............................6
Fireplace Location ...................................................7
Installation Precautions .........................................10
Installation Planning .............................................. 11
Horizontal Termination ..........................................12
Vent Graph ............................................................13
Vertical Sidewall Installation ..................................14
Vertical/Horizontal Termination Congurations .....15
Below Grade Installation .......................................16
Vertical Through-the-Roof
Applications & Installation ...................................17
Installation for Vertical Termination .......................18
Flex Vent Installation .............................................20
Check Gas Type....................................................22
Install Gas Piping to Fireplace/Burner System .....22
Electrical Wiring ....................................................24
Junction Box Wiring ..............................................25
Command Center Wall Installation ........................25
Wall Switch Installation .........................................25
SCS Wiring Diagram .............................................26
BLOTBLDVSC ......................................................27
Glass Only Placement ..........................................29
Operating Instructions ...........................................31
To Turn Off Gas .....................................................31
Touch Screen Remote Control Operation .............35
Burner, Pilot and Control Compartment ................41
Pilot Flame ............................................................41
Burner Flame ........................................................41
Vent System ..........................................................42
Glass Door ............................................................42
Stones ...................................................................42
Firebox Components .............................................44
Signature Command System ................................45
Stones ...................................................................47
Venting Components .............................................48
78D2082 3
WDV See-thru Gas Fireplace
4. Never install the replace
• in a recreational vehicle
• where curtains, furniture, clothing, or other am-
mable objects are less than 42" from the front, top,
or sides of the replace
• in high trafc areas
• in windy or drafty areas
5. This replace 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 touch-
ing.
6. Carefully supervise young children when they are in
the room with replace.
7. Do not modify replace under any circumstances. Any
parts removed for servicing must be replaced prior to
operating replace.
8. Turn replace off and let cool before servicing, install-
ing, or repairing. Only a qualied service person should
install, service, or repair the replace. Have burner
system inspected annually by a qualified service
person.
9. You must keep control compartments, burners, and
circulating air passages clean. More frequent clean-
ing may be needed due to excessive lint and dust.
Turn off the gas valve and pilot light before cleaning
replace.
10. Have venting system inspected annually by a quali-
ed service person. If needed, have venting system
cleaned or repaired. Refer to Cleaning and Mainte-
nance, Page 41.
11. Keep the area around your replace clear of combus-
tible materials, gasoline, and other ammable vapor
and liquids. Do not run replace where these are used
or stored. Do not place items such as clothing or deco-
rations on or around replace.
12. Do not use this replace to cook food or burn paper or
other objects.
13. Never place anything on top of replace.
This replace is a vented product. This replace must be
properly installed by a qualied service person. The glass
door must be properly seated and sealed. If this unit is not
properly installed by a qualied service person with glass
door properly seated and sealed, combustion leakage
can occur.
Early signs of carbon
monoxide poisoning are similar to the u with headaches,
dizziness and/or nausea. If you have these signs, the re-
place may not have been installed properly. Get fresh air
at once! Have the replace inspected and serviced by a
qualied 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 inuence 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 replace.
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 certied
kit is used.
2. For propane/LP replace, 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 instruc-
tions.
Please leave these instructions with the appliance.
Please retain these instructions for future reference
.
478D2082
WDV See-thru Gas Fireplace
14. Do not use any solid fuels (wood, coal, paper, card-
board, etc.) in this replace. Use only the gas type
indicated on rating plate.
15. This appliance, when installed, must be electrically
grounded in accordance with local codes or in the
absence of local codes, with the National Electrical
Code, ANSI/NFPA 70, or the Canadian Electrical Code,
CSA C22.1.
16. Do not obstruct the ow of combustion and ventilation
air in any way. Provide adequate clearances around
air openings into the combustion chamber along with
adequate accessibility clearance for servicing and
proper operation.
17. When the appliance is installed directly on carpeting,
tile or other combustible material other than wood
ooring, 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 replace if any part has been exposed to
or has been under water. Immediately call a qualied
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 replace 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
replace.
21. Do not operate the replace with glass door removed,
cracked, or broken.
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 VENTED GAS
FIREPLACES in the USA and Canada as follows:
WDVST500 TESTED TO: ANSI Z21.50b-2009 / CSA
2.22b-2009 STANDARDS
A manufactured home (USA only) or mobile home OEM
installation must conform with the Manufactured Home
Construction and Safety Standard,
or when such a standard is not applicable, the
, or
.
It is normal for replaces 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.
It is not unusual for gas replace to give off
some odor the rst time it is burned. This is due
to the manufacturing process.
It is recommended that you burn your replace
for at least ten (10) hours the rst time you use
it. Place the fan switch in the “OFF” position
during this time.
WARNING
!
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
78D2082 5
WDV See-thru Gas Fireplace
• This appliance has been certied 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.
Input ratings are shown in BTU per hour and are certied
without deration for elevations up to 4,500 feet (1,370
m) above sea level.
For elevations above 4,500 feet (1,370 m) in USA,
installation must be in accordance with the current
ANSI Z223.1/NFPA 54 and/or local codes having juris-
diction.
In Canada, please consult provincial and/or local authori-
ties having jurisdiction for installation at elevations above
4,500 feet (1,370 m).
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.
WDVST500NTSC Nat. 34,000 27,500 #44
WDVST500PTSC LP 34,000 27,500 1.28 mm
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)
• Reective Glass
• Stone Set
• 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 nishing 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 can be built before or after the appliance
is set in place. Refer to Figure 2 for replace and framing
dimensions. The framing headers may rest on the top of
the rebox standoffs. Do not bring headers below top of
standoffs. When planning your framing and instal-
lation, keep in mind that your gas line can come in on the
right or left side of the rebox (as you are facing it) and
your electricity will come in on the right side.
The rebox may be installed directly on a combustible oor
or raised on a platform of an appropriate height. When
the rebox is installed directly on carpeting, tile, or other
combustible material, other than wood ooring, the rebox
shall be installed on a metal or wood panel extending the
full width and depth of the enclosure.
Figure 1 -
WDVST Fireplace Features
FP2429
DVW prod features
FP2744
Gas Valve
Command
Center
Control
Box & A/C
Module
678D2082
WDV See-thru Gas Fireplace
1/2” or
5/8”
256M” (654 mm)
Min. Rough Opening Width
(516M” (1314 mm)
40” (1016 mm)
3656”
(918 mm)
17(6”
(454 mm)
296QE”
(751 mm)
376”
(956 mm)
7556QE”
(195 mm)
156O”
(38 mm)
136M” (349 mm)
56M”
(146 mm)
6”
(152 mm)
3856O”
(978 mm)
Min. Rough
Opening
Height
782082
WDVST dims
5156M” (1302 mm)
8556QE”
(221 mm)
Required Noncombustible
Material Area
176”
(441 mm)
386”
(975 mm)
Figure 1 -
Fireplace & Framing Dimensions
78D2082 7
WDV See-thru Gas Fireplace
Plan for the installation of your appliance. This includes
determining where the unit is to be installed, the vent con-
guration to be used, framing and nishing 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, includ-
ing permits and inspections.
The following factors should be taken into consideration:
• Clearance to side-wall, ceiling, woodwork, and windows.
Minimum clearances to combustibles
• This replace may be installed as a room divider or an
island. See Figure 3 for suggested locations.
• Location should be out of high trafc areas and away
from furniture and draperies due to heat from appli-
ance.
• Never obstruct the openings of the replace.
• Do install in the vicinity where gasoline or other
ammable liquids may be stored.
• Vent pipe routing. See Venting section found in this
manual for allowable venting congurations.
• These units can be installed in a bedroom. Refer to the
National Fuel Gas Code ANSI Z233.1/NFPA 54 — (cur-
rent edition), the Uniform Mechanical Code — (current
edition), and Local Building Codes for specic installa-
tion requirements.
• These units can be installed in a bathroom.
A
B
Y
X
LU584a
Locating unit
** Island (A) and room divider (B) installation is possible as long
as the horizontal portion of vent system (X) does not exceed
20'. Refer to Installing Horizontal Termination Conguration
on Page 12.
* When you install your replace in (B) room divider, a minimum
of 6" clearance must be maintained from perpendicular wall
and front of replace.
A Island**
B Room Divider*
Y 4" Minimum
Figure 3 -
Possible Fireplace Locations
Refer to cold climate pilot information on Page 33
for more information on standing pilot vs. intermittent pilot
options.
878D2082
WDV See-thru Gas Fireplace
6”
5”
3”456O”45°
1”
356O”
FP2423
mantel leg
156O”
256O”
FP2746
Side of Fire-
place Opening
Figure 5 -
Mantel clearances
54” (1372 mm)
Minimum
Ceiling 12” (305 mm)
Max. Depth
21/2” (64 mm)
Max Depth
6” (152 mm)
Min. From
Opening
12” (305 mm) Min.
From Opening
6”
(152 mm)
Min.
FP2421
mantel clearances
56M” (146 mm)
Min. to Combustibles
Figure 4 -
Ceiling and Sidewall Clearances for
Both Sides of Fireplace
FP2421
9"
(229 mm)
12"
(305 mm)
6"
(152 mm)
12" (305 mm)
6" (152 mm)
256O"
(64 mm)
FP2745
mantel clearances
Wall Stud
Insulation
Board
Standoff
Top of Fireplace
Opening
FP2745
78D2082 9
WDV See-thru Gas Fireplace
The replace must be secured to the oor and/or to framing
studs as shown in Figure 6. Use two (2) wood screws or
masonry/ concrete screws to secure replace to the oor.
Use four (4) screws to attach replace to framing. The side
nailing anges are 1/2" or 5/8" to accommodate different
wall thickness.
: Any remote wiring (i.e. remote control, wall switch,
and optional fan) must be done prior to nal nishing to
avoid costly reconstruction.
Only noncombustible materials (i.e. brick, tile, slate, steel,
or other materials with a UL re rating of Zero) may be
used to cover the black painted face of the appliance. It is
permissible to bring combustible wall board to the top of
the standoffs on the top and to the wall board stand-offs
on the sides of the unit. A 300°F minimum adhesive may
be used to attach facing materials to the black surface. If
joints between the nished wall and the replace surround
are sealed, a 300°F minimum sealant material (General
Electric RTV103 or equivalent) must be used.
Fireplace may be installed on top of framing or
platform constructed of combustible materials which do
not protrude beyond the face.
FP2747
secure fireplace
6”
Framing Members
Nailing Flange
FP2747
Figure 6 -
Secure Fireplace to Framing Studs
Nailing Flange
Nailing Flange
Screws
Screws
Noncombustible Material
10 78D2082
WDV See-thru Gas Fireplace
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 Simpson
Duravent and Selkirk products listed on Page 49.
UL1777 exible venting is also approved for use
on these models. Before installing vent kit, the
installer must read this replace manual and
vent kit instructions.
Only a qualified installer/service person
should install venting system. The installer
must follow these safety rules:
• Wear gloves and safety glasses for protec-
tion.
• 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 modication 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.
FP2748
Vent pipe clearances
50” (1270 mm)
Min. Floor
to Center of
Vent Pipe
*3” (76 mm)
**1”
(25 mm)
**1”
(25 mm)
Figure 7 -
Combustible Clearances for Vent Pipe
12" (305 mm) Vertical
Rise Required Before
Horizontal Run
FP2748
until the
ue penetrates the outside wall.
Z\x
* A minimum of 3" clearance to the top is
required along horizontal length until ue
pipe penetrates outside wall.
** A minimum 1" clearance to combustibles
permitted all around ue at outside wall
78D2082 11
WDV See-thru Gas Fireplace
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.
Select the amount of vertical rise desired. All horizontal
run of venting must have 1/4" (6 mm) rise for every 12"
(305 mm) of run towards the termination below 7Z\x feet
(2.3 m) of vertical rise from the oor of the replace. With
7Z\x feet (2.3 m) or more vertical rise from the oor of the
replace, the horizontal run may run level. NEVER run
vent piping down.
Horizontal venting which incorporates the twist lock pipe
must be installed on a level plane without an inclining or
declining slope.
You may use up to three 90° elbows in this vent congura-
tion. Refer to Vertical/Horizontal Termination Congurations
on Page 15.
Measure the distance from the replace oor to the ceil-
ing. Add the ceiling thickness, the vertical rise in an attic
or second story, and allow for sufcient vent height above
the roof line.
You may use two 45° elbows in place of a 90° elbow.
You must follow rise to run ratios when using 45° elbows.
The appliance is approved for use with three 90° elbows
maximum or a combination of 90° and 45° elbows up to
a maximum of 270°.
For two-story applications, restops are required at each
oor 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 bal-
ance between the combustion air intake and the ue gas
exhaust. Certain limitations apply to vent congurations
and must be strictly followed.
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.
12 78D2082
WDV See-thru Gas Fireplace
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
CFM145a
DV Termin Location
5/01/01 Rev. 12/05/01
sta
INSIDE
CORNER DETAIL
A
G
CFM145a
V
V
V
VV
V
V
V
A = Clearance above grade, veranda, porch, 12” (30 cm) 12” (30 cm)
deck, or balcony
B = Clearance to window or door that may be 6” (15 cm) for appliances 6” (15 cm) for appliances
opened < 10,000BTU/h (3kW), 12” (30 cm) < 10,000 BTU/h (3kW), 9”
for appliances > 10,000 Btuh (3kW) and (23 cm) for appliances > 10,000
< 100,000 BTU/h (30kW), 36” (91 cm) Btuh (3kW) and < 50,000 BTU/h
for appliances > 100,000 BTU/h (30kW) (15kW), 12” (30 cm) for
appliances > 50,000 BTU/h(15kW)
C = Clearance to permanently closed window 12” (305 mm) recommended to 12” (305 mm) recommended to
prevent window condensation prevent window condensation
D = Vertical clearance to ventilated soft located
above the terminal within a horizontal 18” (458 mm) 18” (458 mm)
distance of 2’ (610mm) from the center
line of the terminal
E = Clearance to unventilated soft 12” (305 mm) 12” (305 mm)
F = Clearance to outside corner see next page see next page
G = Clearance to inside corner (see next page) see next page see next page
H = Clearance to each inside of center line 3’ (91 cm) within a height of 15’ (5 m) 3’ (91 cm) within a height of 15’
extended above meter/regulator assembly above the meter/regulator assembly (5 m) above the meter/regulator
assy
I = Clearance to service regulator vent outlet 3’ (91 cm) 3’ (91 cm)
J = Clearance to nonmechanical air supply inlet 6” (15 cm) for appliances < 10,000 6” (15 cm) for appliances
to building or the combustion air inlet to any BTU/h (3kW), 12” (30 cm) for < 10,000 BTU/h (3kW), 9”
other appliances appliances > 10,000 BTU/h (3kW) and (23 cm) for appliances > 10,000
< 100,000 Btuh (30kW), 36” (91 cm) BTU/h (3kW) and < 50,000 BTU/h
for appliances > 100,000 BTU/h (30kW) (15kW), 12” (30 cm) for
appliances > 50,000 BTU/h(15kW)
K = Clearance to a mechanical air supply inlet 6’ (1.83 m) 3’ (91 cm) above if within 10'
(3 m) horizontally
L = Clearance above paved sidewalk or paved 7’ (2.13 m)† 7’ (2.13 m)†
driveway located on public property
M = Clearance under veranda, porch, deck or 12” (30 cm) 12” (30cm)
balcony
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 oor:
NOTE: 1. Local codes or regulations may require different
clearances.
2. The special venting system used on Direct Vent Fireplaces
are certied 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 8 -
Termination Locations
78D2082 13
WDV See-thru Gas Fireplace
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 dimen-
sion 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 re-
place in accordance with same.
Example: If the vertical dimension from the oor of the
replace 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 ue
system.
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
2 4 6 8 10 1214 16 1820
eg: A
FP2132
sidewall vent graph
Figure 10 -
Rear Wall Venting Graph
(No Horizontal Elbows)
Horizontal dimension from the nished outside
wall to the center of the pipe on the replace
Vertical Dimension From the Floor of Unit to the
Center of the Horizontal Vent Pipe
Dimensions in Feet
50" (1270 mm)
From Floor to
Center
Outside Corner
Inside Corner
Termination Clearances
Termination clearances for buildings with combustible and noncombustible exteriors.
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
584-15
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
DMin. = # of Termination caps x 3
CMax. = (2 / # termination caps) x DActual
Termination in an alcove space (spaces open only on one side and with an overhang) is permitted with the dimensions specied for vinyl or
non-vinyl siding and softs. 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 9 -
Termination
Clearances
14 78D2082
WDV See-thru Gas Fireplace
Locate vent opening on the wall. It may be necessary to
rst position the replace and measure to obtain hole lo-
cation. Depending on whether the wall is combustible or
noncombustible, cut opening to size. Figure 11 (For com-
bustible walls rst frame in opening.)
Cut a 10Z\x”H x 10Z\x”W (267 x 267
mm) hole through the exterior wall and frame as shown.
Figure 11
Hole opening must be 8Z\x” (216
mm) in diameter.
VO584-100
Vent Opening
2/99 djt
10Z\x”
(267 mm)
Min.
Fireplace Hearth
Framing Detail
8Z\x”
(216 mm)
Fireplace Hearth
FP2293
Figure 11 -
Locate vent opening on wall
10Z\x”
(267 mm) Min.
Secure restop to the inside frame, center in the 10Z\x” x
10Z\x” (267 x 267 mm) vent opening.
Place replace into position. Measure the vertical height
(X) required from the base of the ue collars to the center
of the wall opening. Figure 12
Using appropriate length of pipe section(s) attach to re-
place with three (3) screws. Follow with the installation of
the elbow.
Measure the horizontal length requirement guring a 1Z\v”
(32 mm) overlap, i.e. from the elbow to the outside wall
cap. Figure 13
XX
Figure 12 -
Vertical Height
Requirement
FP1384
Use appropriate length of pipe sections - telescopic or
xed - and install.
X
X
Figure 13 -
Horizontal Length
Requirement
FP1385
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 1Z\v” (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.
78D2082 15
WDV See-thru Gas Fireplace
AB
10’
FP2749
Horizontal run
reduction
The Vent Graph, showing the relationship between vertical
and horizontal side wall venting, will help to determine the
various dimensions allowable. Figure 10
Horizontal and vertical sections of this vent system
require a minimum of 1" clearance to combustibles at the
top, sides and bottom.
When vent exits through foundations less than 20" (508
mm) below outcrop, the termination must be ush up with
outcropped wall above.
It is best to locate the replace 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 ue collar of the replace (or the top of the
Transition Elbow) to the face of the nished outside wall.
• The maximum number of 90° elbows per side wall
installation is three (3). Figure 14
• A minimum of 12" (305 mm) is required before a 90°
elbow. If a 90° elbow is tted directly after 12" (305 mm)
vertical section mounted to the top of the replace, the
maximum horizontal vent run before the termination or
a vertical rise is 36” (914 mm). Figure 15
Figure 14 -
Maximum Three (3) 90° Elbows Per Installation
3 x 90°
Elbows
12"
(305 mm)
Min.
FP1380
In Figures 16 and 17 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" (45
cm). 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 17
Figure 15 -
Maximum Horizontal Run with No Rise
FP1381
• If a 90° elbow is used in the horizontal vent run (level
height maintained) the horizontal vent length is reduced
by 36" (914 mm). Figures 16 and 17. This does not
apply if the 90° elbows are used to increase or redirect
a vertical rise.
According to the vent graph (Page 13) the maxi-
mum horizontal vent length in a system with a 10' vertical
rise is 17Z\x’ (5.3 m) and if a 90° elbow is required in the
horizontal vent it must be reduced to 14Z\x' (4.4 m).
Figure 16 -
Horizontal Run Reduction
FP2749
Max. 20"
(508mm)
Max. 36"
(914mm)
90° Elbow = 36" (914
mm) Reduction
12" Min.
16 78D2082
WDV See-thru Gas Fireplace
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 17 -
Maximum Elbow Usage
1
2
3
4
1
2
3
4
FP1383
Max bends
12"
Minimum
FP1383
When it is not possible to meet the required vent terminal
clearances of 12" above grade level, a snorkel kit is recom-
mended. 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.
If installing a snorkel, a minimum 12" vertical rise is neces-
sary. The maximum horizontal run with the 12” vertical pipe
is 36". This measurement is taken from the collar of the
replace (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" below base
of snorkel. Install drain pipe. Install window well (not
supplied). Rell hole with 12" of coarse gravel leaving
a clearance of approximately 4" below snorkel. Figure
18
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 18
FP2134
below grade install
FP2134
Figure 18 -
Below Grade Installation
Screws
Minimum
4" (102 mm)
Clearance
Ground
Window
Well
Gravel
Drain
Foundation Wall
Firestop
12"
(305 mm)
Minimum
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel. Fasten
brackets to wall rst, then secure to snorkel with self drill-
ing #8 x 1/2" sheet metal screws. It will be necessary to
extend vent pipes out as far as the protruding wall face.
Figure 19
78D2082 17
WDV See-thru Gas Fireplace
This gas replace 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 20
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°
12" Min.
1
2
3
4
1
2
3
4
FP1179
max bends
Figure 21 -
Maximum Elbow Usage
FP1179
FP1966
snorkel
Figure 19 -
Snorkel Installation, Recessed Foundation
Foundation
Recess
Watertight Seal
Around Pipe
Sheet Metal
Screws
Wall Screws
Snorkel
• 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 an 12' (3.6 m) 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 21
• The maximum angular variation allowed in the system
is 270°. Figure 21
Max.
Height 40' (12.2m)
Min.
Height 8' (2.4 m)
Max. 10' (3m)
40' (12 m)
Maximum Height
12' (3.7 m)
Minimum Height
10' (3 m)
Maximum
Support Straps
Every 3' (914 mm)
12"
(305 mm)
Min.
FP1387
Figure 20 -
Support Straps for Horizontal Runs
18 78D2082
WDV See-thru Gas Fireplace
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
22 to avoid cutting load bearing members.
For optimal ame appearance, a restrictor disk is necessary
on straight vertical runs of 10' of more.
• Runs may not incorporate elbows.
• The disk is part number 56D3027 and is included in
installation manual packet.
• Drop the disk into a 5" inner collar before installing the
rst section of ue or install at the last section before
installing the termination.
• An additional disk may be installed on runs of 35' or more.
Rotate disks perpendicular to each other.
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 21 and 22.
2. Set replace in desired location. Drop a line plumb down
from the ceiling to the position of the ue 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.
1. Cut a 10Z\x" (241 mm) square hole in the ceiling using
the locating hole as a center point The opening should
be framed to 10Z\x" x 10Z\x" (241 x 241 mm) inside dimen-
sions as shown in Figure 21 using framing lumber the
same size as the ceiling joist. If the area above the ceil-
ing is an insulated ceiling or a room, nail restop from
the top side. This prevents loose insulation from falling
into the required clearance space. Figure 23. Otherwise,
install restop below the framed hole. Figure 24
2. Assemble the desired lengths of pipe and elbows nec-
essary to reach from the burner system ue up through
the restop. Be sure pipe and elbow connections are
fully twist-locked.
FP1969
offset w/ wallstrap
Figure 22 -
Offset with Wall Strap and 45° Elbows
Roof Flashing
Wall Strap
45° Elbows
Ceiling Firestop
FP1669
FP1969
firestop w room above
10
1
/
2
"
10
1
/
2
"
FP1970
firestop no room
Figure 23 - If Area Above is a Room, Install Firestop
above Framed Hole as Shown
Figure 24 - If Area Above is Not a Room, Install
Firestop above Framed Hole as Shown
Firestop
Nails
Nails Firestop
FP1970
78D2082 19
WDV See-thru Gas Fireplace
3. Cut a hole in the roof using the locating hole as a center
point. (Cover any exposed open vent pipes before
cutting hole in roof). The 10Z\x"x10Z\x" (241 x 241 mm)
hole must be measured on the horizontal. Actual length
may be larger depending on the pitch of the roof. There
must be a 1" minimum clearance from the vent pipe to
combustible materials. (Insulation should be considered
a combustible material).
4. Connect a section of pipe and extend up through the
hole.
5. Place the ashing over the pipe section(s) extending
through the roof. Secure the base of the ashing to
the roof and framing with roong nails. Be sure roong
material overlaps the top edge of the ashing. There
must be a 1" clearance from the vent pipe to combustible
materials.
6. Continue to add pipe sections until the height of the vent
cap meets the minimum building code requirements.
2 ft.
Min. 2 ft. Min.
X
12
H*
FP1971
Min chimney clearance
Horizontal Overhang
Termination
Vent
Lowest
Discharge
Opening
Storm
Collar
Flashing
Concentric
Vent Pipe
1" Minimum
Clearances to
Combustibles
Vertical Wall
FP1971
Figure 25 -
Minimum Chimney Clearance
Flat to 6/12 1.0
Over 6/12 to 7/12 1.25
Over 7/12 to 8/12 1.5
Over 8/12 to 9/12 2.0
Over 9/12 to 10/12 2.5
Over 10/12 to 11/12 3.25
Over 11/12 to 12/12 4.0
*H - Minimum height from roof to
lowest discharge opening of vent
20 78D2082
WDV See-thru Gas Fireplace
1. Flexible UL1777 listed venting may be used in any
venting application where rigid direct vent components
can be used.
Flex kits may not be modied. Flex
kits may be added to the end of a vent run made of rigid
vent sections using pipe manufacturer's approved ex
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.
2. The ex adapter starter kit (DVFF8A/8) is used to attach
ex venting to the appliance starting collar. It includes
5" inner and 8" outer adapter rings. Figure 26
• The inner and outer adapter rings are required to
start all ex runs.
• Never install damaged or torn exible venting.
• Over tightening clamps may rip, tear, or otherwise
damage exible venting.
• The adapter kit does not include individual pipe sec-
tions which may be purchased separately. (UL1777
listed type venting only.)
3. Start the exible vent as follows:
A. Installing the inner ex adapter and pipe. Figure
26
1. Insert the long side of the 5" inner ring into
exhaust pipe, gently tap to seat into place, and
secure with screws.
2. Slide the small gear clamp over the inner exible
vent pipe, and push out of the way.
3. Pull and extend the inner exible vent.
4. Slide the inner vent onto the adapter collar, for a
minimum 1C\v" overlap.
5. Locate the clamp at approximately 3/4" from the
ex end and tighten.
6. Secure the clamped inner section with three self-
tapping screws, drilled equidistant, just above the
clamp perimeter.
B. Installing the outer ex pipe. Figure 26
1. Firmly insert the 8" outer adapter ring into the
outer appliance starting collar and secure with
screws.
2. Slide the large gear clamp over the outer exible
vent pipe, and push out of the way.
3. Pull and extend the outer exible vent.
FP1972
appliance connection
UL1777
Flex Vent
Screws
(3 places,
equidistant just
above gear
clamp)
1C\v" Flex-
ible Pipe
and Adapter
Outer
DVFF8A/8
Inner Adapter
Outer Adapter
Appliance
Starting Collar
Figure 26 -
Typical Appliance Connection
FP1973
flex pipe bend
UL1777
Flex Vent
5° Radius
Figure 27 -
Minimum Radius for Flex
Vent Section
FP1973
4. S l i d e the
outer vent onto the appliance collar outer adapter
for a minimum 1C\v" overlap.
5. Locate the clamp at approximately 3/4" from the
ex end and tighten.
6. Secure the clamped outer section with three self-
tapping screws, drilled equidistant, just above the
clamp perimeter.
C. Routing UL1777 ex pipe.
1. Always maintain the required clearance when
routing the ex vent assembly.
2. Install restop spacers, Figure 28, when penetrat-
ing ceiling, attic spaces, or walls.
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