Majestic 400DVBL User manual
740009 BLDV cover
74D0010 4/09 Rev. 12
2 74D0010
DVBL Series Gas Fireplace
Installing Above 2000 Feet ............................ 6
Orifice Sizes, Pressures and BTUs ............... 6
Before You Start ............................................ 6
Fireplace Framing ......................................... 7
Fireplace Dimensions.................................... 8
Fireplace Location ......................................... 9
Installation Planning .................................... 14
Rear (Through-the-Wall) Applications ......... 17
Vertical/Horizontal Termination
Configuration ............................................... 19
Below Grade Installation ............................. 21
Vertical Through-the-Roof Applications ....... 22
Installation for Vertical Termination ............. 23
Flex Vent Installation ................................... 25
Check Gas Type .......................................... 27
Installing Gas Piping to Fireplace/Burner
System Location.......................................... 27
Electrical Wiring .......................................... 29
Lighting Pilot for the First Time.................... 33
Lighting Pilot................................................ 34
Lighting Burner ............................................ 35
To Turn Off Gas ........................................... 35
Operating Instructions ................................. 42
To Turn Off Gas To Appliance ..................... 42
Hearth Brick Placement .............................. 47
Rockwool Placement................................... 47
Log Placement ............................................ 47
Burner, Pilot and Control Compartment ...... 49
Pilot Flame .................................................. 49
Burner Flame .............................................. 49
Vent System ................................................ 50
Glass Door .................................................. 50
Logs ............................................................ 50
Rock Wool .................................................. 50
Standing Pilot Ignition ................................. 51
Signature Command System ...................... 53
Firebox Components ................................... 55
Standing Pilot Millivolt Control .................... 56
Signature Command System ...................... 58
Vent Components........................................ 60
Logs ............................................................ 62
74D0010 3
DVBL Series Gas Fireplace
• 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.
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
children and adults away from hot surfaces to avoid
burns or clothing ignition. Fireplace will remain hot
for a time after shutdown. Allow surfaces to cool
before touching.
6. Carefully supervise young children when they are
in the room with fireplace.
7. Do not modify fireplace under any circumstances.
Any parts removed for servicing must be replaced
prior to operating fireplace.
8. Turn fireplace off and let cool before servicing, install-
ing, or repairing. Only a qualified service person
should install, service, or repair the fireplace. Have
burner system inspected annually by a qualified
service person.
9. You must keep control compartments, burners, and
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.
Please leave these instructions with the appliance.
Please retain these instructions for future reference
.
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 fireplace may not have been installed properly.
Get fresh air at once! Have the fireplace inspected and
serviced by a qualified service person. Some people
are more affected by carbon monoxide than others.
These include pregnant women, people with heart or
lung disease or anemia, those under the influence of
alcohol, and those at high altitudes.
Propane/LP gas and natural gas are both odorless. An
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 certi-
fied 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. Continuedonpage4
4 74D0010
DVBL Series Gas Fireplace
Continuedfrompage3
10. Have venting system inspected annually by a quali-
fied service person. If needed, have venting system
cleaned or repaired. See CleaningandMaintenance,
page 35.
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 decorations 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.
15. This appliance, when installed, must be electrically
grounded in accordance with local codes or in the
absence of local codes, with the NationalElectrical
Code,ANSI/NFPA 70, or the Canadian Electrical
Code,CSAC22.1.
16. Do not obstruct the flow of combustion and ventila-
tion air in any way. Provide adequate clearances
around air openings into the combustion chamber
along with adequate accessibility clearance for ser-
vicing 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 quali-
fied 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.
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 fireplaces 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.
We suggest that our gas hearth
products be installed and
serviced by professionals who
are certified in the U.S. by the
National Fireplace Institute®
(NFI) as Gas Specialists.
74D0010 5
DVBL Series Gas Fireplace
FP2073
BLDV controls
Off/Pilot/On Knob
Figure 1 - DVBL Series Fireplace
(Millivolt Control shown)
• 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 appr-
oved.
• The appliance must be properly con-
nected to a venting system.
• The appliance is not approved for closet
or recessed installations.
Hi/Lo Knob
The efficiency rating of this appli-
ance is a product thermal effi-
ciency rating determined under
continuous operating conditions
and was determined indepen-
dently of any installed system.
Thermal Efficiency = up to 80%
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 Z21.88Bb-2008/CSA 2.33b-2008 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
.
On/Off/RS Switch
Ignitor
FP2073
6 74D0010
DVBL Series Gas Fireplace
Manifold Press: (W.C.) 3.5" Manifold Press: (W.C.) 10"
Maximum Supply Pressure 10.5" Maximum Supply Pressure 13"
Minimum Supply Pressure 4.5" Minimum Supply Pressure 11"
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, incom-
plete, 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)
• Rock Wool
• Log Set
• Phillips Screwdriver • Framing Materials
• Hammer • Wall Finishing Materials
• Saw and/or saber saw • Caulking Material (Noncombustible)
• Level • Fireplace Surround Material (Noncombustible)
• Measuring Tape • Piping Complying with Local Codes
• Electric Drill and Bits • Tee Joint
• Pliers • Pipe Sealant Approved for use with Propane/LPG
• Square (Resistant to Sulfur Compounds)
• Pipe Wrench
Model
Number
400DVBLNV 400DVBLPV 500DVBLNV 500DVBLPV 400DVBLNS 400DVBLPS 500DVBLNS 500DVBLPS
Gas Type Natural Propane Natural Propane Natural Propane Natural Propane
Max. BTU/h
Input
26,000 26,000 28,000 27,000 26,000 26,000 28,000 27,000
Min. BTU/h
Input
19,000 21,000 20,000 22,000 19,000 21,000 20,000 22,000
Orifice Size 2.50 mm 1/16 in. #38 1.60 mm 2.50 mm 1/16 in. #38 1.60 mm
Input ratings are shown in BTU per hour and are certified 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 instal-
lation at elevations above 4,500 feet (1,370 m).
74D0010 7
H
G
D
F
E
A
C
B
A
1/2” or 5/8”
C
A
G
C
G
A
1/2” or 5/8”
DVBL Series Gas Fireplace
Firebox framing can be built before or after the appliance is set in place. Construct firebox framing following Figure
2 and the chart below for your specific installation requirements. See Figure3 on page 8 for firebox dimensions.
The framing headers may rest on the top of the firebox standoffs. Do not bring headers below top of standoffs.
Pleasenote:Whenplanningyourframingandinstallation,keepinmindthatyourgaslinewillcomeinonthe
rightsideofthebox(asyouarefacingit)andyourelectricitywillcomeinontheleftside.
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.
Corner Installation
Stud Location
Inside Chase Installation
Recessed Installation
Figure 2 - Framing Dimensions
A 377/16" 417/16"
B 407/8" 407/8"
C 301/4" 341/4"
D 1413/16" 1613/16"
E 643/4" 683/4"
F 323/8" 343/8"
G 171/16" 171/16"
H 4513/16" 485/8"
8 74D0010
A
NF
C
KL
J
I
31 7/8
3
MB
D
E
H
G
15/16
11 3/8
DVBL Series Gas Fireplace
Figure 3 - Fireplace Dimensions
E
H
J
A
D
L
K
C
F
N
MB
I
G
Overall Front Width A 371/16" 411/16"
Inside Width B 3115/16" 3515/16"
Glass Width C 29" 33"
CTR Pipe (L/R) D 189/16" 209/16"
Rear Width E 301/4" 341/4"
Glass Height F 2513/16" 2513/16"
Chassis Height G 371/2" 371/2"
Depth H 179/16" 179/16"
Height to Standoffs I 405/8" 405/8"
CTR Pipe Rear J 75/16" 75/16"
Top Face K 73/4" 73/4"
Side Face L 29/16" 29/16"
Bottom Face M 1" 1"
Overall Front Height N 405/8" 405/8"
74D0010 9
Y
EAB
C
D
F
Y
X
DVBL 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. SeeFigure4for sug-
gested locations.
• Location should be out of high traffic areas and away from furniture and draperies due to heat from appli-
ance.
• 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 Ventingsection found in this manual for allowable venting configurations.
• These units can be installed in a bedroom. See National Fuel Gas Code ANSI Z233.1/NFPA 54 — (current
edition), the Uniform Mechanical Code — (current edition), and Local Building Codes for specific installation
requirements.
• These units can be installed in a bathroom.
Figure 4 - Locating Gas Fireplace
A Flat on Wall
B Cross Corner
C Island**
D Room Divider*
E Flat on Wall Corner*
F Chase Installation
Y 6" Minimum
** Island (C) and room divider (D) installation is possible as long as the horizontal portion of vent system (X)
does not exceed 20'. See InstallingHorizontalTerminationConfigurationon pages 18 and 19.
* 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.
NOTE
If you live in a cold climate, seal all cracks around your appliance, and wherever cold air could enter
the room, with noncombustible material. It is especially important to insulate the outside chase cavity
between the studs and under the floor on which the appliance rests, if the floor is above ground level.
10 74D0010
13" MIN.
6" MIN.
FROM OPENING
71" MINIMUM
CIELING
MANTEL SHELF:
0-12”MAX DEPTH
DVBL Series Gas Fireplace
NOTE: The combustible area above the facing must not protrude more than 3/4" from the facing. If it does,
it is considered a mantel and must meet the mantel requirements listed in this manual.
Figure 5 - Clearances from the mantel,
ceiling, and side wall.
Figure 5a - Mantel clearances.
6"
5"
3"
2.5" 4.5"
45°
3.5"3.5"
1" 1.5"1.5"
All mantel shelves, regardless of depth, should be a
minimum of 13" from top opening of fireplace. Mantel
shelf shall not exceed 12" maximum depth at 13"
minimum height from opening.
Fireplace
Opening
Wall
Combustible
Material Area
74D0010 11
DVBL Series Gas Fireplace
The fireplace must be secured to the floor and/or to framing studs as shown in Figure6. 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.
Figure 6 - Securing Fireplace to Floor and Framing Studs
Framing
Framing
Nailing
Flange
Nailing
Flange
Screws
Screws
Screws
Nailing
Flange
Nailing
Flange
12 74D0010
DVBL Series Gas Fireplace
Consult local building codes before beginning the installation. The installer must make sure to select the proper
vent system for installation. Before installing vent kit, the installer must read this fireplace manual and vent
kit instructions.
Only a qualified installer/service person should install venting system. The installer must follow these safety
rules:
• Wear gloves and safety glasses for protection.
• Use extreme caution when using ladders or when on rooftops.
• Be aware of electrical wiring locations in walls and ceilings.
The following actions will void the warranty on your venting system:
• Installation of any damaged venting component.
• Unauthorized modification of the venting system.
• Installation of any component part not manufactured or approved by MHSC.
• Installation other than permitted by these instructions.
NOTE: 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 and side edges of the black painted face. 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.
74D0010 13
DVBL Series Gas Fireplace
Figure 7 - Combustible Clearances for Vent Pipe
A minimum of 3" clearance to the top is
required along horizontal length until flue
pipe penetrates outside wall.
A minimum 1"
clearance to
combustibles
permitted all
around flue at
outside wall
12" vertical rise required
before horizontal run
until
the flue penetrates the outside wall.
14 74D0010
DVBL 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 71/2 ft, of vertical rise. With 71/2 ft. or
more vertical rise,the horizontal run may run level. NEVER
run vent piping downward.
You may use up to three 90° elbows in this vent configura-
tion. See Horizontal Termination Configurations on pages
17 and 18.
Measure the distance from the fireplace floor to the ceiling. Add the ceiling thickness, the vertical rise in an attic
or second story, and allow for sufficient vent height above the roof line.
NOTE: You may use two 45° elbows in place of a 90° elbow. You must follow rise to run ratios when using
45° elbows. The appliance is approved for use with three 90° elbows maximum or a combination of 90°
and 45° elbows up to a maximum of 270°.
For two-story applications, firestops are required at each floor level. If an offset is needed in the attic, additional
pipe and elbows will be required.
You may use a chase with a vent termination with exposed pipe on the exterior of the house. See InstallingVent
SysteminaChase 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.
74D0010 15
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
DVBL 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. Figure9
G = Clearance to an inside corner.Figure9
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 Refer to Figure 9 [*For Canada 12" (305 mm)
minimum***].
* 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.
16 74D0010
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
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
DVBL Series Gas Fireplace
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 dimension on the
Sidewall Vent Graph below, locate the point intersecting with
the slanted graph line.
2. From the point of this intersection, draw a vertical line to the
bottom of the graph.
3. Select the indicated dimension, and position the fireplace in
accordance with same.
Example:Iftheverticaldimensionfromthefloorofthefire-
placeis11'(3.4m)thehorizontalruntothefaceoftheouter
wallmustnotexceed14'(4.3m).
Example:Iftheverticaldimensionfromtheflooroftheunit
is7’(2.14m),thehorizontalruntothefaceoftheouterwall
mustnotexceed61/2'(2m).
Sidewall Vent Graph showing the relationship between vertical
and horizontal dimensions for a Direct Vent flue system. 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
Combustible – 6" (152 mm)
Noncombustible – 2" (51mm)
74D0010 17
DVBL Series Gas Fireplace
Sealant is not required to assemble fireplace venting. Do
not use silicone sealant at the flue exhaust connections.
1. Find the pipe section's direction label. The label arrow
shall be pointed away from the firebox and toward the
termination. Firmly insert the initial rigid section/elbow
into the firebox outer collar. Simpson "GS" and Selkirk
"DT" outer walls are hemmed and will snap into the
collar's tabs. Attach Simpson's DirectVent Pro by fully
inserting into the collar and securing with self-tapping
screws. The screws shall only penetrate the flue outer
wall.
Refer to vent manufacturer's installation instructions
to properly assemble flue.
2. Locate and cut the vent opening in the wall. For com-
bustible walls first frame in opening.
Cut an 111/2"H x 91/2"W
hole through the interior wall.
Cut a 91/2"H x 91/2"W
square hole through the exterior wall frame. Figure12
Hole opening should be
71/2" (190 mm) in diameter.
3. The center of the hole should align with the center line
of the horizontal rigid vent pipe end. Pipe shall always
run level or uphill on horizontal runs. Never run pipe
down hill. Figure12
Female Locking Lugs
Male Slots
Horizontal runs
of vent must be sup-
ported every three feet
(914 mm). Use wall
straps for this purpose.
Figure 11 - Rigid Vent Pipe Connections
91/2"
(241 mm)
91/2"
(241 mm)33/4"
(92 mm)
71/2"
(190 mm)
Figure 12 - Exterior Wall Framing Dimensions
18 74D0010
DVBL Series Gas Fireplace
4. Apply a bead of non-hardening mastic around the outside
edge of vent cap. Position the vent cap in the center of
hole on the exterior wall with the word "HOT" on the vent
cap facing up. Insure proper clearance of 1" to combus-
tibles is maintained to the flue. Attach the vent cap with
four wood screws supplied. Figure13
HOT
Vent Cap
Wood Screw
Apply Mastic to
all Four Sides
Figure 13 - Installing Horizontal Termination
HOT
Cut Vinyl Siding
Away to Fit Standoff
Standoff #950
Simpson
Termination
#985
Bolt
Wood Screw
Nut
Apply
Mastic to all
Four Sides
Figure 14 - Installing Simpson/Selkirk Vinyl
Siding Standoff and Termination
Inerior Wall
Surface
Firestop
Horizontal
Vent Pipe
Screw
Vent Cap
(Horizontal
Termination)
Figure 15 - Installing Firestop on
Horizontal Vent Pipe
NOTE: Replace the wood screws with appropriate
fasteners for stucco, brick, concrete, or other types
of siding.
A vinyl siding standoff (part #950) must be used with the
Simpson/Selkirk Horizontal Termination (part #985) on vinyl,
stucco or wood-clad exterior walls. Apply non-hardening
mastic around outside edge of the standoff instead of the
vent cap assembly. Figure14
5. Slide the firestop over the vent pipe before connecting
the horizontal run to the vent cap. Figure15
6. The termination should overlap the flue a minimum of 11/4". Apply silicone to the outer pipe/ter-
mination connection. Fasten termination with screws provided.
7. Slide the firestop against the interior wall surface and attach with screws. Figure15
74D0010 19
12" Min.
DVBL Series Gas Fireplace
• The maximum number of 90° elbows per side wall installation is three (3). Figure16
• 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 24” (914 mm). Figure17
The Vent Graph, showing the relationship between vertical and horizontal side wall venting, will help to determine
the various dimensions allowable. Figure10
NOTE: Horizontal sections of this vent system require a minimum of 3" clearances to combustibles at the top of
the flue and 1" clearance at the sides and bottom until the flue penetrates the outside wall. A minimum 1" clearance
all around the flue is acceptable at this point of penetration. If the vertical run is 71/2 ft. or more, the clearance is 1"
on all sides of the horizontal run.
Vertical sections of this vent system require a minimum of 1" clearance to combustibles on all sides of the pipe.
When vent exits through foundations less than 20" below outcrop, the termination must be flush up with out-
cropped 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.
Figure 16 - Maximum Three (3) 90° Elbows
Per Installation
Figure 17 - Maximum Horizontal Run with No Rise
3 x 90°
Elbows
24"
Max.
24"
Max.
12" Min.
20 74D0010
DVBL Series Gas Fireplace
(continued)
• If a 90° elbow is used in the horizontal vent run
(level height maintained) the horizontal vent length is
reduced by 36". SeeFigures16and17,page 19. This
does not apply if the 90° elbows are used to increase
or redirect a vertical rise. Figure19
Example:According to the vent graph (page 16) the
maximumhorizontalventlengthinasystemwitha10'
verticalriseis20’(6m)andifa90°elbowisrequiredin
thehorizontalventitmustbereducedto17'(5.2m).
In Figures 18 and 19 dimension A plus B must not be
greater than 17' (5.2m).
• 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" (45cm). 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°. Figure20
Figure 19 - Maximum Vent Run with Elbows
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 18 - Horizontal Run Reduction
Figure 20 - Maximum Elbow Usage
90°
A + B = 17' Maximum
90° Elbow = 3'
1 + 2 + 3 + 4 = 270°
1
2
3
4
10'
10'
10'
7'
12" Min.
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