Monessen Hearth WDV Wideview WDV500 User manual
78D0011 7/09 Rev. 2
780012
DVW/WDV cover
278D0011
WDV Series Gas Fireplace
High Elevations .......................................................5
Gas Pressures ........................................................5
Gas Specifications & Orifice 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/Horizontal Termination Configurations .....14
Below Grade Installation .......................................15
Vertical Through-the-Roof
Applications & Installation ...................................16
Installation for Vertical Termination .......................17
Flex Vent Installation .............................................19
Check Gas Type....................................................21
Installing Gas Piping to Fireplace/Burner System
Location ..............................................................21
Electrical Wiring ....................................................23
Glass Only Placement ..........................................27
Operating Instructions ...........................................28
To Turn Off Gas .....................................................29
Operation Instructions ...........................................30
Remote Control Operation ....................................33
Burner, Pilot and Control Compartment ................36
Pilot Flame ............................................................36
Burner Flame ........................................................36
Vent System ..........................................................37
Glass Door ............................................................37
Stones ...................................................................37
Firebox Components .............................................39
Signature Command System ................................40
Venting Components .............................................42
Stones ...................................................................44
78D0011 3
WDV Series Gas Fireplace
4. Never install the fireplace
• in a recreational vehicle
• 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 touch-
ing.
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 clean-
ing 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 36.
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 deco-
rations 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.
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.
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 instruc-
tions.
Please leave these instructions with the appliance.
Please retain these instructions for future reference
.
478D0011
WDV Series Gas 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.
15. This appliance, when installed, must be electrically
grounded in accordance with local codes or in the
absence of local codes, with the National Electrical
Code, ANSI/NFPA 70, or the Canadian Electrical Code,
CSA C22.1.
16. Do not obstruct the flow of combustion and ventilation
air in any way. Provide adequate clearances around
air openings into the combustion chamber along with
adequate accessibility clearance for servicing and
proper operation.
17. When the appliance is installed directly on carpeting,
tile or other combustible material other than wood floor-
ing, 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.
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:
TESTED TO: ANSI Z21.88b-2008/CSA 2.33b-2008 STANDARDS
A manufactured home (USA only) or mobile home OEM installation must conform with the Manufac-
tured Home Construction and Safety Standard, or when such a standard
is not applicable, the , or
.
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.
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.
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.
WARNING
!
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
78D0011 5
WDV Series Gas Fireplace
Figure 1 -
WDV Fireplace Features
• 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.
Input ratings are shown in BTU per hour and are certi-
fied 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
jurisdiction.
In Canada, please consult provincial and/or local
authorities having jurisdiction for installation at eleva-
tions 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.
WDV500NTSC Nat. 34,000 23,000 #43
WDV500PTSC LP 33,000 25,500 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)
• Reflective 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 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 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
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 firebox (as you are facing it) and
your electricity will come in on the right side.
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.
FP2429
DVW prod features
FP2429
Gas Valve
Command
Center Control Box &
A/C Module
678D0011
WDV Series Gas Fireplace
1/2” or
5/8”
2356M” (591 mm)
Min. Rough Opening Width
(466” (1184 mm)
17(6”
(454 mm)
186QE”
(462 mm)
Minimum Rough
Opening
Depth
40” (1016 mm)
3656”
(918 mm)
17(6”
(454 mm)
296QE”
(751 mm)
35(6QE”
(900 mm)
356O”
(89 mm)
156O”
(38 mm)
136M” (349 mm)
56M”
(146 mm)
6”
(152 mm)
81
(6
” (2080 mm)
57
(6
” (1470 mm)
41”
(1041 mm)
57
(6
” (1470 mm)
356”
(905 mm)
Min. Rough
Opening
Height
780012
DVW WDV dims
4656” (1172 mm)
86QE”
(211 mm)
Required Noncombustible
Material Area
Figure 2 -
Fireplace and Framing Dimensions
78D0011 7
WDV Series Gas Fireplace
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
• This fireplace may be installed along a wall, across a corner, or use an exterior chase. See
Figure 3 for suggested locations.
• Location should be out of high traffic areas and away from furniture and draperies due to
heat from appliance.
• Never obstruct the front opening of the fireplace.
• Do 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 configura-
tions.
• 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.
Y
EAB
C
D
F
YB
X
LU584-2
Locating unit
** 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 12.
* 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 3 -
Possible Fireplace Locations
878D0011
WDV Series Gas Fireplace
72” Minimum
Ceiling
12” Max.
Depth
21/2” Max Depth
6” Min.
From Opening
12” Min.
From Opening
6” Min.
FP2421
mantel clearances
Figure 4 -
Ceiling and Sidewall Clearances
6”
5”
3”456O”45°
1”
356O”
FP2423
mantel leg
156O”
256O”
FP2423
Side of Fire-
place Opening
Figure 5 -
Mantel clearances
FP2421
9"
12"
6"
12"
6"
21/2"
FP2422
mantel clearances
Wall Stud
Insulation
Board
Standoff
Top of Fireplace
Opening
FP2422
78D0011 9
WDV Series Gas Fireplace
FP2430
secure fireplace
6”
The fireplace must be secured to the floor and/or to framing studs as shown in Figure 6. 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.
Framing Members
Nailing Flange
FP2430
Figure 6 -
Secure Fireplace to Framing Studs
: Any remote 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 painted face of the appliance. 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 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.
Nailing Flange
Nailing Flange
Screws
Screws
Fireplace may be installed on top of framing or platform constructed of combustible
materials which do not protrude beyond the face.
Noncombustible Material
10 78D0011
WDV Series 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 41. 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
venting system. The installer must follow these
safety rules:
• Wear gloves and safety glasses for
protection.
• Use extreme caution when using lad-
ders or when on rooftops.
• Be aware of electrical wiring locations
in walls and ceilings.
The following actions will void the warranty on
your venting system:
• Installation of any damaged venting
component.
• Unauthorized modification of the vent-
ing system.
• Installation of any component part not
manufactured or approved by MHSC.
• Installation other than permitted by these instruc-
tions.
1”
FP2424
Vent pipe clearances
50”
Min. Floor
to Center of
Vent Pipe
Figure 7 -
Combustible Clearances for Vent Pipe
A minimum of 1"
clearance to all
sides is required
along horizontal and
vertical length
A minimum 1"
clearance to
combustibles
permitted all
around flue at
outside wall
12" Vertical Rise
Required Before
Horizontal Run
FP2424
78D0011 11
WDV Series 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" rise for every
12" of run towards the termination below 7Z\x feet of vertical rise. With 7Z\x feet or more vertical
rise off top of fireplace, the horizontal run may run level. NEVER run vent piping down.
You may use up to three 90° elbows in this vent configuration. Refer to Vertical/Horizontal Ter-
mination Configurations on Page 14.
Measure the distance from the fireplace floor to the ceiling. Add the ceiling thickness, the vertical
rise in an attic or second story, and allow for sufficient vent height above the roof line.
You may use two 45° elbows in place of a 90° elbow. You must follow rise to run ratios
when using 45° elbows. The appliance is approved for use with three 90° elbows maximum or
a combination of 90° and 45° elbows up to a maximum of 270°.
For two-story applications, firestops are required at each floor level. If an offset is needed in the
attic, additional pipe and elbows will be required.
You may use a chase with a vent termination with exposed pipe on the exterior of the house.
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.
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 78D0011
WDV Series Gas Fireplace
Figure 8 -
Horizontal Vent Termination Location
Vent Terminal Air Supply Inlet Area Where Terminals Not Permitted
Inside Corner Detail
A = Clearance above the grade, a veranda, porch, deck, or balcony [*12" (305 mm) minimum].
B = Clearance to window or door that may be opened [*12" (305 mm) minimum].
C = Clearance to permanently closed window [*minimum 12" (305 mm) recommended to prevent condensation
on window]
D = Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of two (2) feet
(610 mm) from the centerline of the terminal [18" (457 mm) minimum].
E = Clearance to unventilated soffits [12" (305 mm) minimum]. Clearance to vinyl soffit [30" (762 mm)].
F = Clearance to an outside corner. Figure 9
G = Clearance to an inside corner. Figure 9
H = *Not to be installed above a gas meter/regulator assembly within three (3) feet (914 mm) horizontally from the
centerline of the regulator.
I = Clearance to service regulator vent outlet [*3' (914 mm) minimum].
J = Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance [*12"
(305 mm) minimum].
K = Clearance to a mechanical air supply inlet [*6' (1829 mm) minimum].
L = Clearance above a paved sidewalk or paved driveway located on public property [**7' (2133 mm) minimum].
M = Clearance under veranda, porch, deck, or balcony [For Canada 12" (305 mm) minimum***] Figure 9
* As specified in CSA B149 Installation Codes. Note: Local codes or regulations may require different
clearances.
** A vent must not terminate directly above a sidewalk or paved driveway, which is located between two single-
family dwellings and serves both dwellings.
*** Only permitted if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the
floor.
V
V
V
V
V
V
V
V
D
L
E
B
C
F
B
B
B B
B
M
I
A
A
J
H
G
A
Operable
Fixed
Closed Fixed
Closed
Opera-
ble
K
A
A
A
G
78D0011 13
WDV Series Gas Fireplace
V
GG=6" (152mm)
FF=6" (152mm)
V
V
G
G = Combustible 24"(610mm)
Noncombustible 18"(457mm)
Combustible &
Noncombustible
H = 24" (610mm)
J = 20" (508mm)
V
H
J
C = Maximum depth of 48" (1219mm)
for alcove location
D = Minimum width for back wall of
alcove location
Combustible - 38" (965mm)
Noncombustible - 24" (610mm)
E =Clearance from corner in alcove
location
Combustible - 6" (152mm)
Noncombustible - 2" (51mm)
E
V
D
C
C
Inside Corner
Alcove Location
Outside Corner
Balcony with No Side Wall Balcony with Perpendicular
Side Wall
FP1951
termination clearances
Figure 9 -
Allowable Venting Chart
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 fire-
place in accordance with same.
Example: If the vertical dimension from the floor 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.
Combustible – 6" (152 mm)
Noncombustible – 2" (51 mm)
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
Horizontal dimension from the finished outside
wall to the center of the pipe on the fireplace
Vertical Dimension From the Floor of Unit to the
Center of the Horizontal Vent Pipe
Dimensions in Feet
50"
From Floor to
Center
14 78D0011
WDV Series Gas Fireplace
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" 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 11
• A minimum of 12" is required before a 90° elbow. If a 90°
elbow is fitted directly after 12" vertical section mounted
to the top of the fireplace, the maximum horizontal vent
run before the termination or a vertical rise is 36” (914
mm). Figure 12
FP1176
max 90 bends
Figure 11 -
Maximum Three (3) 90° Elbows Per Installation
3 x 90°
Elbows
12" Min.
FP1176
In Figures 13 and 14 dimension A plus B must not be
greater than 17' (5.2 m).
• The maximum number of 45° elbows permitted per side
wall installation is two (2). 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" (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 15
Figure 12 -
Maximum Horizontal Run with No Rise
Max 20"
Max 20"
36"
(914 mm)
Max.
36"
(914 mm)
Max.
FP1177
max horizontal run
12”
(610 mm)
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 Page 17, Figures 11 and 12. This does
not apply if the 90° elbows are used to increase or redi-
rect a vertical rise. Figure 14
Example: 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 13 -
Horizontal Run Reduction
AB
10’
90°
FP2427
Horizontal run
reduction
FP2427
78D0011 15
WDV Series Gas Fireplace
A 10’
B 7’
10’
FP2426
max vent run w/elbows
Figure 14 -
Maximum Vent Run with Elbows
A + B = 17' Maximum
90° Elbow = 3'
FP2426
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 15 -
Maximum Elbow Usage
1
2
3
4
1
2
3
4
FP1180
max bends
12"
Minimum
FP1180
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
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" below base
of snorkel. Install drain pipe. Install window well (not
supplied). Refill hole with 12" of coarse gravel leaving
a clearance of approximately 4" below snorkel. Figure
16
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 16
FP2134
below grade install
FP2134
Figure 16 -
Below Grade Installation
Screws
Minimum
4" Clearance
Ground
Window
Well
Gravel
Drain
Foundation Wall
Firestop
12"
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 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 17
16 78D0011
WDV Series Gas Fireplace
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 18
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 19 -
Maximum Elbow Usage
FP1179
FP1966
snorkel
Figure 17 -
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 19
• The maximum angular variation allowed in the
system is 270°. Figure 19
FP1183
max height
40' Maximum Height
12' Minimum Height
10'
Maximum
Support Straps
Every 3'
12" Min.
FP1183
Figure 18 -
Support Straps for Horizontal Runs
78D0011 17
WDV Series 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
20 to avoid cutting load bearing members.
For optimal flame 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
first section of flue 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 19 and 20.
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.
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 22 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 firestop from
the top side. This prevents loose insulation from falling
into the required clearance space. Figure 21. Otherwise,
install firestop below the framed hole. Figure 22
2. Assemble the desired lengths of pipe and elbows nec-
essary to reach from the burner system flue up through
the firestop. Be sure pipe and elbow connections are
fully twist-locked.
FP1969
offset w/ wallstrap
Figure 20 -
Offset with Wall Strap and 45° Elbows
Roof Flashing
Wall Strap
45° Elbows
Ceiling Firstop
FP1669
FP1969
firestop w room above
10
1
/
2
"
10
1
/
2
"
FP1970
firestop no room
Figure 21 - If Area Above is a Room, Install Firestop
above Framed Hole as Shown
Figure 22 - If Area Above is Not a Room, Install
Firestop above Framed Hole as Shown
Firestop
Nails
Nails Firestop
FP1970
18 78D0011
WDV Series 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.
NOTE: If an offset is needed to avoid obstructions,
you must support the vent pipe every three (3) feet.
Use wall straps for this purpose. See Figure 18, page
19. Whenever possible, use 45° elbows instead of 90°
elbows. The 45° elbow offers less restriction to the flow
of the flue gases and intake air.
5. Place the flashing over the pipe section(s) extending
through the roof. Secure the base of the flashing to
the roof and framing with roofing nails. Be sure roofing
material overlaps the top edge of the flashing. 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.
NOTE: You must increase vent height for steep roof
pitches. Nearby trees, adjoining roof lines, steep
pitched roofs, and other similar factors may cause
poor draft or down-drafting in high winds. Increasing
the vent height may solve this problem.
NOTE: If the vent pipe passes through any occupied
areas above the first floor, including storage spaces
and closets, you must enclose pipe. You may frame and
sheetrock the enclosure with standard construction
material. Make sure to meet the minimum allowable
clearances to combustibles. Do not fill any of the
required clearance spaces with insulation.
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 23 -
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
78D0011 19
WDV Series 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 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.
2. The flex adapter starter kit (DVF8A/8) is used to attach flex
venting to the appliance starting collar. It includes 5" inner
and 8" outer adapter rings. Figure 24
• The inner and outer adapter rings are required to start
all flex runs.
• Never install damaged or torn flexible venting.
• Over tightening clamps may rip, tear, or otherwise
damage flexible venting.
• The adapter kit does not include individual pipe sec-
tions which may be purchased separately. (UL1777
listed type venting only.)
3. Start the flexible vent as follows:
A. Installing the inner flex adapter and pipe. Figure 24
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 flexible vent pipe,
and push out of the way.
3. Pull and extend the inner flexible 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 flex 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 flex pipe. Figure 24
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 flexible vent pipe, and push out
of the way.
3. Pull and extend the outer flexible vent.
4. Slide 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 flex end and tighten.
6. Secure the clamped outer section with three self-tapping screws, drilled
equidistant, just above the clamp perimeter.
C. Routing UL1777 flex pipe.
1. Always maintain the required clearance when routing the flex vent assembly.
FP1972
appliance connection
UL1777
Flex Vent
Screws
(3 places,
equidistant just
above gear
clamp)
1C\v" Flex-
ible Pipe
and Adapter
Outer
DVF8A
Inner Adapter
Outer Adapter
Appliance
Starting Collar
Figure 24 -
Typical Appliance Connection
FP1973
flex pipe bend
UL1777
Flex Vent
5° Radius
Figure 25 -
Minimum Radius for Flex
Vent Section
FP1973
20 78D0011
WDV Series Gas Fireplace
Termination
Cap
Storm Collar
Roof Support
Flashing
Rigid Pipe
Length
Flex to Pipe
Adapter
(FPA/8)
Firestop UL1777 Flex
PIpe
DVF8A/8
Adapter
Figure 26 -
Typical Vertical Flex Vent Installation
FP1975
pipe connection
Screws
(3 Places
equidistant
just above
gear clamp)
Rigid Pipe Length
Flex to Pipe Adapter
(FPA/8)
Gear Clamp
1C\v" Flexible Pipe and Adapter
Outer Collar Overlap
UL1777 Flex Vent
Figure 27 -
Typical Pipe Connection
Gear Clamp
FP1976
horizontal flex
Screws
(3 Places equidistant just
above gear clamp)
Gear Clamp
UL1777 Flex Vent
1C\v" Flexible Pipe and
Collar Overlap
MHSC Horizontal
Vent Termination
Figure 28 -
Typical Horizontal Flex Vent Installation
FP1974
2. Install firestop spacers, Figure 26, when penetrating ceiling, attic spaces, or walls.
3. Do not allow the flexible vent to bend in radius tighter than 5" (127 mm). Figure 25
4. Horizontal runs of flexible vent shall be supported at maximum 2 foot intervals; vertical runs,
five feet intervals. Metal strapping, properly secured, is an acceptable means to support the
flexible vent.
5. Flexible vent spacers are to be installed at intervals prescribed by the flexible vent manufac-
turer; and in such a way as to maintain concentric inner and outer vent spacing.
D. Attaching flexible venting to vertical termination assemblies.
1. When using Simpson pipe, an MHSC flex-to-pipe adapter (FPA) and/or rigid pipe section(s) is
required to connect the flexible vent assembly to the vertical termination by using three self-
penetrating screws.
2. Review Figure 27 and corresponding instructions for proper overlap, clamp and screw place-
ment.
3. Three each self-penetrating screws are drilled opposite one another and below the gear
clamp.
4. Use only listed and approved terminations and accessories, installed per the installation instruc-
tions and Figure 26.
E. Installing flexible venting to horizontal termination assemblies.
1. Connect the 5" flexible vent to the horizontal termination as in Figure 28.
2. Connect the 8" flexible vent to the termination ring as in Figure 28.
3. Review Figure 28 for proper overlap and clamp placement.
4. Three each self-penetrating screws are drilled opposite one another and below the gear
lamp.
5. Use only listed an approved terminations and accessories, installed per the termination instruc-
tions and Figure 28.
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