Majestic fireplaces DVRTSB User manual

Homeowner’s Installation and
Operating Manual
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10003848 1/07 Rev. 3
WARNING!
IF THE INFORMATION IN THIS
MANUAL IS NOT FOLLOWED
EXACTLY, A FIRE OR EXPLOSION
MAY RESULT, CAUSING
PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electric switch; do
not use any phone in your building.
• Immediately call your gas supplier
from your neighbor’s phone. Follow
the gas suppliers instructions.
• If you cannot reach your gas supplier
call the fire department.
DO NOT STORE OR USE GASOLINE OR
OTHER FLAMMABLE VAPORS AND/OR
LIQUIDS IN THE VICINITY OF THIS OR
ANY OTHER APPLIANCE.
Bay Window
Rear/Top Convertible
Direct Vent Fireplaces
Model: DVRTSB
INSTALLER/CONSUMER
SAFETY INFORMATION
PLEASE READ THIS MANUAL
BEFORE INSTALLING AND USING
APPLIANCE
FOR YOUR SAFETY
Installation and service must be
performed by a qualified installer,
service agency or your gas supplier.
CERTIFIED
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.

2
DVRTSB Bay Window Fireplace
10003848
Installation & Operating Instructions
Important Curing/Burning Instructions .................................................................................3
Fireplace Dimensions ..........................................................................................................4
Locating Your Fireplace .......................................................................................................6
Clearance to Combustibles ................................................................................................. 6
Mantels ................................................................................................................................6
Hearths ................................................................................................................................6
Framing & Finishing ............................................................................................................6
Final Finishing ..................................................................................................................... 7
Gas Specifications ...............................................................................................................7
Gas Inlet and Manifold Pressures ....................................................................................... 7
High Elevations ...................................................................................................................7
Gas Line Installation ............................................................................................................7
EB-1 Electrical Box Connection ..........................................................................................8
Remote ON/OFF Switch Installation ...................................................................................8
Alternate Switch Location ....................................................................................................8
Optional Top Vent Application .............................................................................................. 9
Venting Installation Instructions
General Venting Information-Termination Location ..........................................................10
General Information For Connecting Vent Pipes ...............................................................12
How to Use the Vent Graph ...............................................................................................13
Rear Wall Vent Applications & Installation .........................................................................13
Vertical Sidewall Applications & Installation ......................................................................14
Below Grade Installation.. .................................................................................................17
Vertical Through-the-Roof Applications & Installation .......................................................18
Vertical Through the Roof Installation............................................................................. .. 18
Twist Lock Vent Components ............................................................................................20
Operating Instructions
Glass Information .............................................................................................................. 21
Louvre Removal ................................................................................................................ 21
Glass/Frame Removal .......................................................................................................21
Glass Cleaning ..................................................................................................................22
Ceramic Refractory Installation ......................................................................................... 22
Installation of Logs ............................................................................................................22
Lava Rocks & Ember Material ...........................................................................................23
Flame & Temperature Adjustment .....................................................................................23
Flame Characteristics .......................................................................................................23
Lighting & Operating Instructions ...................................................................................... 24
Trouble Shooting Guide .....................................................................................................25
Fuel Conversion Instructions .............................................................................................27
Maintenance .................................................................................................................................28
Replacement Parts ...................................................................................................................... 29
Optional Accessories
Fan Kits ............................................................................................................................. 32
Remote Controls ...............................................................................................................33
Warranty ......................................................................................................................................35
Thank you & congratulations on your purchase of a CFM Corporation fireplace.
PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING APPLIANCE.
IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these
instructions may result in a possible fire hazard and will void the warranty.
Table of Contents

3
DVRTSB Bay Window Fireplace
10003848
This appliance may be installed in an aftermarket
permanently located, manufactured home or mobile
home, where not prohibited by local codes.
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.
The DVRTSB has been approved for mobile home
installations.
This gas appliance should be installed by a qualified
installer in accordance with local building codes
and with current CSA-B149.1 Installation codes for
Gas Burning Appliances and Equipment. For U.S.A
Installations follow local codes and/or the current
National Fuel Gas Code ANSI Z223.1/NFPA 54.
In the Commonwealth of Massachusetts, all gas fitting
and installation of this heater shall only be done by a
licensed gas fitter or licensed plumber.
FOR SAFE INSTALLATION AND OPERATION
PLEASE NOTE THE FOLLOWING:
1. This fireplace gives off high temperatures and should
be located out of high traffic areas and away from
furniture and draperies.
2. Children and adults should be alerted to the hazards
of high surface temperatures of this fireplace and
should stay away to avoid burns or ignition of cloth-
ing.
3. CAUTION: Due to high glass surface temperature
children should be carefully supervised when in
the same room as fireplace.
4. Under no circumstances should this fireplace be
modified. Parts removed for servicing should be
replaced prior to operating this fireplace again.
5. Installation and any repairs to this fireplace must be
performed by a qualified installer, service agency or
gas supplier. A professional service person should
be contacted to inspect this fireplace annually.
Make it a practice to have all of your gas fireplaces
checked annually. More frequent cleaning may be
required due to excess lint and dust from carpeting,
bedding material, etc.
6. Control compartments, burners and air passages in
this fireplace should be kept clean and free of dust
and lint. Make sure the gas valve and pilot light are
turned off before you attempt to clean this fireplace.
7. The venting system (chimney) of this fireplace
should be checked at least once a year and if
needed your venting system should be cleaned.
8. Keep the area around your fireplace clear of com-
bustible materials, gasoline and other flammable
vapor and liquids. This fireplace should not be used
as a drying rack for clothing, nor should Christmas
stockings or decorations be hung in the area of it.
9. Under no circumstances should any solid fuels
(wood, coal, paper or cardboard etc.) be used in
this fireplace.
10.The flow of combustion and ventilation air must not
be obstructed in any way.
IMPORTANT:
PLEASE READ THE FOLLOWING CAREFULLY
Remove any plastic from trim parts before turning the
fireplace ON.
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 a gas fireplace to give off some
odor the first time it is burned. This is due to the
curing of the paint and any undetected oil from the
manufacturing process.
Please ensure that your room is well ventilated
- open all windows during burn in period.
It is recommended that you burn your fireplace for
at least ten (10) hours the first time you use it. If
the optional fan kit has been installed, place the fan
switch in the “OFF” position during this time.
Installation & Operating Instructions
Proposition 65 Warning: Fuels used in gas, wood-
burning or oil fired appliances, and the products of
combustion of such fuels, contain chemicals known
to the State of California to cause cancer, birth de-
fects and other reproductive harm.
California Health & Safety Code Sec. 25249.6
WARNING: Check with your electronics manufactur-
er before installing a television or other electronic
device above this fireplace.
11. When fireplace is installed directly on carpeting, vinyl
tile or any combustible material other than wood,
this fireplace must be installed on a metal or wood
panel extending the full width and depth of the
fireplace.
12. This fireplace requires adequate ventilation and
combustion air to operate properly.
13. This fireplace must not be connected to a chimney
flue serving a separate solid fuel burning fireplace.
14. When the fireplace is not in use it is recommended
that the gas valve be left in the OFF position.

4
DVRTSB Bay Window Fireplace
10003848
E
F
F
G
G
C
D
Rough
Opening
Height
B
A
1¹⁄₂" Dia.
I
H
J
K - Rough Opening Depth
M - Rough Opening Width
7/8" Dia.
5⁷⁄₁₆"
(138mm)
3⁷⁄₈"
(99mm)
4¹⁄₈"
(105mm)
2³⁄₈"
(60mm)
3848
DVRTSB
top vent
specs
7/03
L
Fireplace Dimensions (Installed as Top Vent)
Gas
Line
Inlet EB1 Box Inlet
3848
Fig. 2 Fireplace specifications and framing dimensions.
Ref. DVRTSB (Top Vent)
A 35” (888 mm)
B 34³⁄₈” (873 mm)
C 32³⁄₄” (831 mm)
D 34⁷⁄₈” (885 mm)
E 2¹⁄₄” (56 mm)
F 2” (51 mm)
G 17¹⁄₂” (444 mm)
H 24” (610 mm)
I 5¹⁄₂” (139 mm)
J 2³⁄₈” (61 mm)
Framing Dimensions
K 24” (610 mm) minus one finishing material
thickness to be even with face of unit
L Not to be framed until unit is set in place due
to 3¹⁄₈” (79 mm) allowance for flue collar.
M 35” (888 mm) minus twice the finishing material
thickness to be even with face of unit.

5
DVRTSB Bay Window Fireplace
10003848
C
D
Rough
Opening
Height
B
A
1¹⁄₂" Dia.
I
H
J
K - Rough Opening Depth
M - Rough Opening Width
E
F
F
G
G
7/8" Dia.
5⁷⁄₁₆"
(138mm)
3⁷⁄₈"
(99mm)
4¹⁄₈"
(105mm)
2³⁄₈"
(60mm)
3848
DVRTSB
rear vent
specs
7/03
L
Fireplace Dimensions (Installed as Rear Vent)
3848
Gas
Line
Inlet EB1 Box
Inlet
Fig. 3 Fireplace specifications and framing dimensions.
Ref. DVRTSB (Rear Vent)
A 35” (888 mm)
B 34³⁄₈” (873 mm)
C 32³⁄₄” (831 mm)
D 34⁷⁄₈” (885 mm)
E 2¹⁄₄” (56 mm)
F 2” (51 mm)
G 17¹⁄₂” (444 mm)
H 24” (610 mm)
I 5³⁄₄” (139 mm)
J 2³⁄₈” (61 mm)
Framing Dimensions
K 24” (609 mm) minus one finishing material
thickness to be even with face of unit
L 35¹⁄₄” (895 mm)
M 35” (888 mm) minus twice the finishing material
thickness to be even with face of unit.

6
DVRTSB Bay Window Fireplace
10003848
Top of Unit to Ceiling ......................................... 36” (914 mm)
Front of Unit to Combustibles ............................ 36” (914 mm)
Appliance
Top .................................................. (0”) 0 mm to stand-off
Bottom ................................................................ (0”) 0 mm
Back .........................................(1/2”) 13 mm to rear panel
Side Wall ........................................................... (0”) 0 mm.
(behind side glass panel)
Venting
Concentric sections of DV Vent
Top, bottom & sides .......................................... (1”) 25 mm
Non-concentric sections of DV Vent
Side and bottom ................................................ (1”) 25 mm
Top .................................................................... (2”) 51 mm
1. Choose the unit location.
2. Place the unit into position and secure it to the floor
with 1¹⁄₂” (38 mm) screws, or nails. The holes to
secure the unit to the floor are located just behind
the access door grille on the left and right side of the
unit.
3. Frame in the fireplace with a header across the top.
It is important to allow for the finished wall face when
setting the depth of the frame.
4. Drywall (sheetrock) or wood material may be placed
with a zero clearance to the top edges of the appli-
Cold climate installation recommendation:
When installing this unit against a non-
insulated exterior wall or chase, it is
mandatory that the outer walls be insulated
to conform to applicable insulation codes.
Framing and Finishing
Hearth
Mantels
The height that a combustible mantel is fitted above the
fireplace is dependent on the depth of the mantel. This
also applies to the distance between the mantel leg (if
fitted) and the fireplace.
For the correct mounting height and widths refer to
Figure and the Mantel Chart below.
Noncombustible mantels and legs may be installed at
any height and width around the appliance.
When using paint or lacquer to finish the
mantel, such paint or lacquer must be heat
resistant to prevent discoloration.
Clearance to Combustibles
Mantel Chart
Mantel Shelf Mantel from Top
Ref. or Breast Plate Ref. of Comb. Chamber
Depth
V 10” (254 mm) A 19” (483 mm)
W 8” (203 mm) B 17” (432 mm)
X 6” (152 mm) C 15” (381 mm)
Y 4” (101 mm) D 13” (330 mm)
Z 2” (51 mm) E 11” (279 mm)
A B C D E
V
W
X
Y
Z
Fireplace
CFM146
DV Mantel Chart
7/5/01 sta
CFM146
NOTE: The above mantel shelf chart will be applied
for the front and two sides of the fireplace.
Top Louvre
Assembly
Top of
Combustion
Chamber
Bottom of Door
Trim
Fig. 4 Combustible mantel minimum installation.
A hearth is not mandatory but is recommended for
aesthetic purposes. We recommend a noncombustible
hearth which projects out 12” (305mm) or more from
the front of the fireplace.
Locating Your Fireplace
A. Wall Location (Fig. 1)
Y (Minimum distance between a glass panel and a parallel
wall = 3’ (914 mm)
Z (Minimum distance between edge of a glass panel and
an adjacent wall = 2-3/4” (70 mm)
B. Island Location (FIg. 1)
X (Maximum length of horizontal venting = 20’ (6.1 m).
Refer to the venting section of this manual for specific
dimensions.
X
XX
Y
Y
Y
Z
A
A
B
FP1374
Fig. 1 Locating gas fireplace.

7
DVRTSB Bay Window Fireplace
10003848
If a Trim Kit is going to be installed on the fireplace, the
brick or tile will have to be installed flush with the edges
of the appliance.
Final Finishing
Noncombustible materials such as brick or tile may be
extended over the edges of the face of the appliance.
DO NOT cover any vent or grille panels.
ance when finishing walls above sides of the appli-
ance with glass windows. Attach the wall finishing to
the constructed frame not the appliance.
5. On DVRTSB models, drywall, wood or wood molding
may be placed with zero clearance to the rear
wall of the unit, along the vertical edge formed
by the standoffs to intersection of the rear wall to the
side wall containing the small glass window. Attach
the wall finishing to the constructed frame, not the
appliance.
Gas Specifications
Model Fuel Gas Control BTU/h BTU/h
DVRTSB RN Nat Millivolt 30,000 21,000
DVRTSB RP Prop Millivolt 30,000 22,500
Max.
Input
Min.
Input
Gas Inlet and Manifold Pressures
Natural LP (Propane)
Inlet Minimum Pressure 5.5” w.c. 11.0” w.c.
Inlet Maximum Pressure 14.0” w.c. 14.0” w.c.
Manifold Pressure 3.5” w.c. 10.0” w.c.
DVRTSB
Certified To
ANSI Z21.88 - 2005 / CSA 2.33 - 2005
Vented Gas Fireplace Heaters
High Elevations
Input ratings are shown in BTU per hour and are
certified without deration for elevations up to
4,500 feet (1,370m) above sea level.
For elevations above 4,500 feet (1,370m) in USA,
installations 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 installations at
elevations above 4,500 feet (1,370m).
Units: B02A01, B02B01
Gas Line Installation
When purging the gas lines, the front glass
must be removed.
The gas pipeline can be brought in through the side and
back of the fireplace as well as the bottom. Knockouts
are provided on the bottom behind the valve to allow for
the gas pipe installation and testing of any gas connec-
tion. It is most convenient to bring the gas line in from
the right side of the valve as this allows fan installation
or removal without disconnecting the gas line.
The gas line connection can be made with properly
tinned 3/8” copper tubing, 3/8” rigid pipe or an approved
flex connector. Since some municipalities have addi-
tional local codes, it is always best to consult your local
authority and the CSA-B149.1 installation codes.
For USA installations consult the current National Fuel
Gas Code, ANSI Z223.1/NFPA 54.
Always check for gas leaks with a mild
soap and water solution. Do not use an
open flame for leak testing.
FP297A
INSTA VENT FREE
UVHB26 GAS SUPPLY
7/1/98
1/2” Gas Supply
1/2” NPT x 1/2” Flare
Shut-off Valve
3/8” Flex Line
(From Valve)
FP297a
Fig. 5 Typical gas supply installation.
The gas control is equipped with a captured screw type
pressure test point, therefore it is not necessary to pro-
vide a 1/8” test point up stream of the control.
When using copper or flex connector use only approved
fittings. Always provide a union when using black iron
pipe so the gas line can be easily disconnected for
burner or fan servicing. Refer to the gas specification
for pressure details and ratings.
The fireplace valve must not be subjected
to any test pressures exceeding 1/2 psi.
Isolate or disconnect this or any other gas
appliance control from the gas line when
pressure testing.

8
DVRTSB Bay Window Fireplace
10003848
The fireplace, when installed, must be elec-
trically connected and grounded in accord-
ance with local codes or, in the absence
of local codes, with the current CSA C22.1
Canadian Electrical Code
For USA installations follow the local
codes and the national electrical code
ANSI/NFPA No. 70.
It is strongly suggested that the wiring of
the EB-1 Electrical Junction Box be carried
out by a licensed electrician.
Ensure that the power to the supply line
has been disconnected before commenc-
ing this procedure.
The EB-1 Electrical junction box has been supplied
standard on this model to allow for the easy connection
of an optional fan kit. (Fig. )
To connect the EB-1 box to the house electrical supply
follow the steps below.
1. Remove the front cover of the EB-1 box.
2. Remove the plug socket assembly from the EB-1
box.
3. Feed the supply line in from the outside through the
electrical knock-out.
4. Connect the ground wire of the supply line to the
green screw of the socket assembly.
5. Connect the white wire of the power line to the
chrome screw of the socket assembly.
6. Connect the black wire of the power supply line to
the brass screw (polarized) of the socket assembly.
7. Refit the socket assembly back into the electrical
box and replace the cover plate.
8. The EB-1 electrical junction box is now ready to
supply power to the FK12 or FK24 fan kits, if fitted.
EB-1 Electrical Box
1. Thread the wiring through the holes on the end
panels of the appliance. Take care not to cut the wire
or insulation on metal edges. Route the wire to
a conveniently located receptacle box.
2. Attach the wire to the ON/OFF switch and install the
switch into the receptacle box.
3. Connect the other ends of the wire to the gas
control valve. (Fig. 7)
Alternate Switch Location
The remote switch can be installed on the front/side of
the access door. Simply mount the switch to the bracket
provided and screw the bracket to either side of the
frame, lining up the screws with the pre-punched holes.
(Fig. 8)
Remote ON/OFF Switch Installation
FP1375
EB-2
7/03
Electrical Box (EB-1)
FK24 Fan
Kit
Mounting
Studs
Retaining
Screw
1¹⁄₂”
Gas
Inlet
Holes
FP1375
Fig. 6 EB-1 electrical box.
TP
TH
TP
TH
FP1376
remote switch
7/03
Remote ON/OFF Switch or Ther-
mostat or Remote Control
Gas
Control
Valve
FP1376
Fig. 7 Remote switch wiring diagram.
FP1377
Fig. 8 Alternate switch location.

9
DVRTSB Bay Window Fireplace
10003848
This appliance is shipped as a rear vent unit. If the
installation layout requires the unit to be a top vent con-
figuration the appliance can be converted by following
the steps below.
When removing and refitting the plates and adapter be
sure the associated gaskets are undamaged and refitted
as required.
1. Remove the 10 screws securing the outer collar
adapter to the fireplace body. (Fig. 9)
2. Set the collar aside, complete with the gasket. Do not
damage the gasket as the adapter and gasket must
be refitted.
3. Remove all of the insulation material (exposed in
Step 2) from the top of the unit. (Fig. 10) This
material can be discarded, however if the unit is con-
verted back to rear vent for any reason a new piece
of insulation material approved by CFM Corporation
must be used for this purpose.
4. Remove the four (4) screws securing the flue cover
plate to the top of the intake box and remove the
cover and gasket. (Fig. 11)
5. Remove four (4) screws securing the flue pipe to
back of the intake box and remove pipe and gasket.
(Fig. 11)
6. Secure the plate and gasket removed in Step 4 over
the flue opening in the back of the intake box. Ensure
the gasket is in place and undamaged.
7. Install the flue pipe and gasket removed in Step 5
over the flue opening in the top of the intake box.
8. Refit the outer collar adapter and gasket to the unit
with the round collar on the top. Secure the adapter
with the 10 screws removed in Step 1.
When converting the appliance to top vent, ensure
the insulation material referred to in Step 3 is com-
pletely removed.
Optional Top Vent Application
FP1030
Outer Collar Adapter
Flue Pipe
2/16/00 djt
Outer Col-
lar Adapter
Flue
Pipe
Remove
Screws (5)
Remove
Screws
(5)
Rear View
FP1030
Fig. 9 Remove screws from outer collar adapter.
FP1027
DV360/580
Outer Collar Adapter
Flue Pipe
1/27/00 djt
Insulation
Flue
Cover
Flue
Pipe
Remove Screws (4)
Remove
Screws (4)
FP1027
Fig. 10 Remove flue cover and flue pipe.
FP1378
remove flue
7/03
Flue Cover Plate
Flue
Pipe
FP1378
Fig. 11 Remove flue pipe and flue cover plate.

10
DVRTSB Bay Window Fireplace
10003848
General Venting Information – Termination Location
Your fireplace is approved to be vented either through
the rear wall or the vertical side wall, or vertical through
the roof.
• Only venting components specifically approved and
labeled for this fireplace may be used.
• Venting terminals shall not be recessed into a wall or
siding.
• Horizontal venting must be installed on a level plane
without any incline or decline.
There must not be any obstruction such as bushes, gar-
den sheds, fences, decks or utility buildings within 24”
from the front of the termination hood.
Location of Vent Termination
It is imperative the vent termination be located observ-
ing the minimum clearances as shown on this page.
*Check with local codes or in absence of same with
CSAB149.1 Installation Codes (1991) for Canada or fol-
low the current National Fuel Gas Code, ANSIZ223.1/
NFPA 54 for installations in the USA.

11
DVRTSB Bay Window Fireplace
10003848
V
V
V
V
V
V
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


Operable
Operable Fixed
Closed
V
B
CFM145a
DV Termin Location
5/01/01 Rev. 12/05/01
sta
INSIDE
CORNER DETAIL
V
A
G
N
N
CFM145a
General Venting Information - Termination Location
A = Clearance above grade, veranda, porch, 12” (30cm) 12” (30cm)
deck, or balcony
B = Clearance to window or door that may be 6” (15cm) for appliances 6” (15cm) for appliances
opened < 10,000Btuh (3kW), 12” (30cm) < 10,000 Btuh (3kW), 9”
for appliances > 10,000 Btuh (3kW) and (23cm) for appliances > 10,000
< 100,000 Btuh (30kW), 36” (91cm) Btuh (3kW) and < 50,000 Btuh
for appliances > 100,000 Btuh (30kW) (15kW), 12” (30cm) for
appliances > 50,000 Btuh (15kW)
C = Clearance to permanently closed window 12” (305mm) recommended to 12” (305mm) recommended to
prevent window condensation prevent window condensation
D = Vertical clearance to ventilated soffit located
above the terminal within a horizontal 18” (458mm) 18” (458mm)
distance of 2’ (610mm) from the center
line of the terminal
E = Clearance to unventilated soffit 12” (305mm) 12” (305mm)
F = Clearance to outside corner see next page see next page
G = Clearance to inside corner (see next page) see next page see next page
H = Clearance to each inside of center line 3’ (91cm) within a height of 15’ (5m) 3’ (91cm) within a height of 15’
extended above meter/regulator assembly above the meter/regulator assembly (5m) above the meter/regulator
assy
I = Clearance to service regulator vent outlet 3’ (91cm) 3’ (91cm)
J = Clearance to nonmechanical air supply inlet 6” (15cm) for appliances < 10,000 6” (15cm) for appliances
to building or the combustion air inlet to any Btuh (3kW), 12” (30cm) for < 10,000 Btuh (3kW), 9”
other appliances appliances > 10,000 Btuh (3kW) and (23cm) for appliances > 10,000
< 100,000 Btuh (30kW), 36” (91cm) Btuh (3kW) and < 50,000 Btuh
for appliances > 100,000 Btuh (30kW) (15kW), 12” (30cm) for
appliances > 50,000 Btuh (15kW)
K = Clearance to a mechanical air supply inlet 6’ (1.83m) 3’ (91cm) above if within 10
feet (3m) horizontally
L = Clearance above paved sidewalk or paved 7’ (2.13m)† 7’ (2.13m)†
driveway located on public property
M = Clearance under veranda, porch, deck or 12” (30cm)‡ 12” (30cm)‡
balcony
N = Clearance above a roof shall extend a minimum of 24” (610mm) above the highest point when it passes through the roof
surface, and any other obstruction within a horizontal distance of 18” (450mm).
1 In accordance with the current CSA-B149 Installation Codes
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Codes
† A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and
serves both dwellings
‡ only permitted if veranda, porch, deck or balcony is fully open on a minimum 2 sides beneath the floor:
NOTE: 1. Local codes or regulations may require different clearances.
2. The special venting system used on Direct Vent Fireplaces are certified as part of the appliance, with clearances tested and
approved by the listing agency.
3. CFM Corporation assumes no responsibility for the improper performance of the appliance when the venting system does not
meet these requirements.
Canadian Installations1 US Installations2
Fig. 12 Termination location requirements.

12
DVRTSB Bay Window Fireplace
10003848
General Information for Connecting Vent Pipes
Fig. 12a Termination clearances.
Canadian Installations:
Venting system must be installed in accordance with
the current CSA-B149.1 installation code.
USA Installations:
The venting system must conform with local codes and/
or the current National Fuel Gas code ANSI Z223.1/
NFPA 54.
Only direct vent components manufactured by CFM
Corporation can be used in Direct Vent systems.
Twist Lock Pipes
When using CFM Corporation twist-lock pipe it is not
necessary to use sealant on the joints. The only areas
of the venting system that need to be sealed with high
temperature silicone sealant are the sliding joints of any
telescopic vent section used in the system.
TWL100
Twist Lock Pipe
3/12/99 djt
Male End Female End
Screw Holes TWL100
Fig. 14 Twist-lock pipe joints.
To join the twist lock pipes together, simply align the
beads of the male end with the grooves of the female
end, twisting the pipe until the flange on the female
end contacts the external flange on the male end. It is
recommended that you secure the joints with three (3)
sheet metal screws, however this is not mandatory with
twist lock pipe.
NOTE: For ease of assembly, use a lubricant (Vaseline
or similar substance) on male end of twist lock pipe
prior to assembly.
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 = 24" (610 mm)
P = 20” (508 mm)
M
F
Alcove Applications*
C
D
C
E
V
V
Combustible &
Noncombustible
V
V
V
E = Min. 6” (152 mm) for
non-vinyl sidewalls
Min. 12” (305 mm) for
vinyl sidewalls
O = 8’ (2.4 m) Min.
O
P
584-15
No.
of Caps DMin. CMax.
1 3’ (.9 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
*NOTE: Termination in an alcove space (spaces open only on one side and with an overhang) is permitted with the dimensions
specified for vinyl or non-vinyl siding and soffits. 1. There must be a 3’ (914 mm) minimum between termination caps. 2. All
mechanical air intakes within 10’ (1 m) of a termination cap must be a minimum of 3’ (914 mm) below the termination cap. 3. All
gravity air intakes within 3’ (914 mm) of a termination cap must be a minimum of 1’ (305 mm) below the termination cap.

13
DVRTSB Bay Window Fireplace
10003848
The vent chart should be read in conjunction with the
following vent installation instructions to determine the
relationship of 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, (Fig. 15)
locate the point intersecting with 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 A:
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 14’ (4.3 m).
Example B:
If the vertical dimension from the floor of the unit is
7’ (2.14 m), the horizontal run to the face of the outer
wall must not exceed 8¹⁄₂’ (2.6 m).
How to Use the Vent Graph Rear Wall Vent Applications
When installed as a rear vent unit this appliance may
be vented directly to a termination located on the rear
wall behind the appliance.
• Specific rear vent starter kits must be used in these
applications (see ‘Venting Components’). The
appliance has been approved for installation flat
against a rear wall. (Fig. 16)
• The maximum horizontal distance between the rear
of the appliance and the outside face of the rear wall
is 20” (508mm). (Fig. 16)
• The minimum clearances between any combustible
material and the vent pipe sections are:
Top ..................................................... 2” (51 mm)
Sides .................................................. 1” (25 mm)
Bottom ................................................ 1” (25 mm)
When the vent termination is installed in an accessible
location, a Screen Guard Kit, item #7V1B60, should be
installed. (Accessible means the termination is likely to
be touched)
Horizontal dimension from the outside face of the wall
to the center of the fireplace vent flange
Vertical dimension from the floor of the unit
To the center of the horizontal vent pipe
CFM102
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
eg: A
eg: B
CFM102
DV Graphic
9/28/00 sta
Fig. 15 Sidewall vent graph showing the relationship be-
tween vertical and horizontal dimensions for a Direct Vent flue
system.
20"
(508 mm)
FP1379
Fig. 16 Rear vent application, no elbows.
Rear Wall Vent Installation
STEP 1
Locate and cut the vent opening in the wall. (Fig. 17)
For combustible walls first frame in opening. ( Fig. 17)
Combustible Walls: Cut a 10³⁄₈”H x 9³⁄₈” W (265 x
240mm) hole through the exterior wall and frame.
(Fig.21)
Noncombustible Walls: Hole opening must be 7¹⁄₂”
(190 mm) in diameter.
STEP 2
Measure wall thickness and cut zero clearance sleeve
parts to proper length (MAXIMUM 12”/305 mm). As-
semble sleeve to its maximum opening (10³⁄₈” x 9³⁄₈”)
and attach to firestop with #8 sheet metal screws (sup-
plied). Install firestop assembly. (Fig. 18)

14
DVRTSB Bay Window Fireplace
10003848
STEP 5
Guide the vent through the vent hole as you place the
appliance in its installed position. Guide the 4” (102mm)
and 7” (175 mm) collars of the vent termination into the
outer ends of the venting. Do not force the termination.
If the vent pipes do not align with the temination remove
and realign the venting at the appliance flue collars.
Attach the termination to the wall as outlined in the
instruction sheet supplied with the termination.
Vertical Sidewall Applications
VO584-100
Vent Opening
2/99 djt
Vent Opening for Combustible Wall
9³⁄₈”
(240 mm)
10³⁄₈”
(265 mm)
Framing Detail
Opening for Noncombustible Wall
7¹⁄₂”
(190 mm)
VO584-100
Fig. 17 Locate vent opening on wall.
Zero clearance sleeve is only required for
combustible walls.
ZCS101
Zero Clearance Sleeve
3/11/99 djt
Max. Length 12”
(305mm)
#8 Screws (2)
#8 Screws
(2)
Adjustable Zero Clearance Sleeve ZCS101
#8 Screws (2)
Firestop
Adjustable Zero
Clearance Sleeve
Fig. 18 Adjustable zero clearance sleeve.
Since it is very important the venting system maintain
its balance between the combustion air intake and the
flue gas exhaust, certain limitations as to vent configu-
rations apply and must be strictly adhered to.
The vent graph showing the relationship between verti-
cal and horizontal side wall venting will help to deter-
mine the various dimensions allowable.
Minimum clearance between vent pipes
and combustible materials is one 1”
(25mm) on top, bottom and sides unless
otherwise noted.
When the vent termination exits through foundations
less than 20” (508 mm) below siding outcrop, the vent
pipe must flush up with the siding.
It is always best to locate the fireplace in such a way
that minimizes the number of offsets and horizontal
vent length of vent pipe from the flue collar of the fire-
place to the face of the outer wall.
Horizontal plane means no vertical rise exists on this
portion of the vent assembly.
When installing the appliance as a rear
vent unit the 90° Transition Elbow attached
directly to the rear of the unit is not in-
cluded in the following criteria and calcula-
tions, and unless specifically mentioned
should be ignored when calculating vent-
ing layouts.
FP1380
Fig. 19 Maximum number of 90· elbows per sidewall.
STEP 3
Measure the horizontal length requirement for the vent-
ing including a 2” (51 mm) overlap, i.e. from the elbow
to the outside wall face plus 2” (51 mm) (or the distance
required if installing a second 90° elbow. (Fig. 17)
STEP 4
Install the 4” (102 mm) vent to the appliance collar and
secure with three (3) sheetmetal screws. Install the 7”
(175 mm) vent pipe to the appliance collar and secure
with three (3) sheet metal screws. It is not necessary to
seal this connection.
It is critical that there is no downward
slope away from the appliance when con-
necting the vent or elbow.

15
DVRTSB Bay Window Fireplace
10003848
• The maximum number of 90° elbows per side wall
installation is three (3).
• If a 90° elbow is fitted directly on top of the fireplace
flange, the maximum horizontal vent run before the
termination or a vertical rise is 36” (914 mm).
Max. 20"
(508mm)
Max. 36"
(914mm)
FP1381
Fig. 20 Maximum horizontal vent run.
• If a 90° elbow is used in the horizontal vent run
(level height maintained) the maximum horizontal
vent length is reduced by 36” (914 mm). (Fig. 21)
This does not apply if the 90° elbows are used to
increase or redirect a vertical rise. (Fig. 21)
Example: According to the chart the maximum horizon-
tal vent length in a system with a 7.5’ vertical rise is
20’ (6 m) and if a 90° is required in the horizontal vent it
must be reduced to 17’ (5.2 m).
Dimension A plus B must not be greater than 17’
(5.2m). (Fig. 21)
• 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 in the vertical part of the vent system.
• The maximum number of elbow degrees in a system
is 270°. (Fig. 22)
7'6"
(2286mm)
AB
A + B = 17' Max.
(5.2m)
90°
FP1382
Fig. 21 Maximum vent run with elbows.
1
2
3
4
1 + 2 + 3 + 4 = 270o
1
2
3
4
FP1383
Fig. 22 Maximum number of elbows allowed.
Example: In Fig. 22
Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Vertical Sidewall Installation
STEP 1
Locate vent opening on the wall. It may be necessary
to first position the fireplace and measure to obtain hole
location. Depending on whether the wall is combustible
or noncombustible, cut opening to size. (Fig. 23) For
combustible walls first frame in opening. (Fig. 23)
Combustible Walls: Cut a 9³⁄₈”H x 9³⁄₈”W (240 x
240mm) hole through the exterior wall and frame as
shown in Figure 23.
Noncombustible Walls (Fig. 23): Hole opening must
be 7¹⁄₂” (190 mm) in diameter.
VO584-100
Vent Opening
2/99 djt
Vent Opening for Combustible Wall
9³⁄₈”
(240 mm)
9³⁄₈”
(240 mm)
Framing Detail
Opening for Noncombustible Wall
7¹⁄₂”
(190 mm)
VO584-100
Fig. 23 Locate vent opening on wall.

16
DVRTSB Bay Window Fireplace
10003848
STEP 2
Measure wall thickness and cut zero clearance sleeve
parts to proper length (MAXIMUM 12”/305 mm). As-
semble sleeve and attach to firestop with #8 sheet
metal screws (supplied). Install firestop assembly. (Fig.
24)
Zero clearance sleeve is only required for
combustible walls.
STEP 3
Place fireplace into position. (Fig. 25) Measure the ver-
tical height (X) required from the base of the flue collars
to the center of the wall opening.
ZCS101
Zero Clearance Sleeve
3/11/99 djt
Max. Length 12”
(305mm)
#8 Screws (2)
#8 Screws
(2)
Adjustable Zero Clearance Sleeve ZCS101
#8 Screws (2)
Firestop
Adjustable Zero
Clearance Sleeve
Fig. 24 Adjustable zero clearance sleeve.
XX
FP1384
Fig. 25 Vertical height requirements.
STEP 5
Measure the horizontal length requirement including a
2” (51 mm) overlap, i.e. from the elbow to the outside
wall face plus 2” (51 mm) (or the distance required if
installing a second 90° elbow. (Fig. 26)
Always install horizontal venting on a level
plane.
STEP 6
Use appropriate length of pipe sections - telescopic or
fixed and install. The section which goes through the
wall is packaged with the starter kit, and can be cut to
suit if necessary.
Sealing vent pipe and firestop gaps with high tem-
perature sealant will restrict cold air being drawn in
around fireplace.
X
X
FP1385
Fig. 26 Horizontal length requirement.
STEP 4
Apply a bead of silicone to the inner and outer flue
collars of the fireplace and using appropriate length of
pipe section(s) attach to fireplace with three (3) screws.
Follow with the installation of the inner and outer elbow,
again secure joints as described in “Connecting Vent
Pipes”.
STEP 7
Apply high temperature sealant to 4” (100mm) and 7”
(175mm) collars or the termination one inch away from
crimped end. Guide the vent terminations 4” and 7” col-
lars into their respective vent pipes. Double check that
the vent pipes overlap the collars by 2” (50mm). Secure
the termination to the wall with screws provided and
caulk around the wall plate to weatherproof.
Support the horizontal pipes every 36” (914mm)
with metal pipe straps.
Check the fireplace to make sure that it is levelled
and properly positioned.

17
DVRTSB Bay Window Fireplace
10003848
Below Grade Installation
When it is not possible to meet the required vent ter-
minal clearances of 12” (305 mm) above grade level a
starter kit is recommended. It allows installation depth
of down to 7” (178 mm) below grade level. The 7”
(178mm) is measured from the center of the horizontal
vent pipe as it penetrates through the wall.
If venting system is installed below ground, we recom-
mend a window well with adequate and proper drain-
age.
Ensure sidewall venting clearances are observed.
If installing a snorkel, a minimum 24” (610mm) vertical
rise is necessary. The maximum horizontal run with the
24” (610mm) vertical pipe is 36” (914mm). The meas-
urement is taken from the collar of the fireplace (or tran-
sition elbow) to the face of the exterior wall. See Vent
Chart (see ‘How to use the Vent Graph’) for extended
horizontal runs if the vertical exceeds 24” (610mm).
1. Establish vent hole through the wall. (Fig. 23)
2. Remove soil to a depth of approximately 16”
(406mm) below base of snorkel. Install drain pipe.
Install window well (not supplied). Refill hole with 12”
(305mm) of coarse gravel leaving a clearance of ap-
proximately 4” (100mm) below snorkel. (Fig. 27)
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 4” and 7” 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” (100mm) clear-
ance below snorkel. (Fig. 27)
Do not back fill around snorkel.
A clearance of at least 4” (100mm) must
be maintained between the snorkel and the
soil.
If the foundation
is recessed, use
recess brackets
(not supplied) for
securing lower
portion of the
snorkel. Fasten
brackets to wall
first, then secure
to snorkel with self
drilling #8 x 1/2
sheetmetal screws.
It will be necessary
to extend vent
pipes out as far as
protruding wall face. (Fig. 28)
Zero Clearance
Sleeve if Required
Firestop
7” Pipe
7DVSKS
(Snorkel)
Screws
Minimum 4” Clearance
Ground
Window Well
Gravel
Drain
Foundation Wall
• A minimum of 24” (610mm) vertical
pipe must be installed when using
the 7DVSKS/7TDVSKS kit.
• The 22” vertical rise (center to cen-
ter) of the snorkel may be included
for calculation of max. horizontal
run.
24” (610mm)
Minimum
FP1386
Fig. 27 Below grade installation.
CFM139
Snorkel
2/26/01 sta
Snorkel
Wall
Screws
Sheet Metal
Screws
Water-
tight Seal
Around
Pipe
Foundation
Recess
CFM139
Fig. 28 Snorkel installatin, recessed
foundation.
Vertical Through-the-Roof Applications
This Gas Fireplace has been approved for:
• Vertical installations up to 40’ (12 m) in height. Up to
a 10’ (3 m) horizontal vent run can be installed
within the vent system using a maximum of two 90°
elbows. (Fig. 29 & 30)
• Up to two (2) 45° elbows may be used within the
horizontal run. For each 45° elbow used on the
horizontal level the maximum horizontal length must
be reduced by 18” (457 mm).
Example: Maximum horizontal length
0 x 45° elbows = 10’ (3 m)
1 x 45° elbows = 8.5’ (2.6 m)
2 x 45° elbows = 7’ (2.1 m)
• A minimum of an 8’ (2.4 m) vertical rise.
• A maximum of two (2) sets of 45° elbow offsets can
be used within these vertical installation. From 0 to
a maximum of 8’ of vent pipe can be used between
elbows. (Fig. 30)
• 7DVCS supports offsets. (Fig. 32) This application
will require that you first determine the roof pitch
and use the appropriate starter kit. (See Venting
Components List)
• The maximum angular variation allowed in the
system is 270˚. (Fig. 30)

18
DVRTSB Bay Window Fireplace
10003848
1. Locate your fireplace.
2. Plumb to center of the (4”) flue collar from ceiling
above and mark position.
3. Cut opening equal to 9³⁄₈” x 9³⁄₈” (240 x 240 mm).
4. Proceed to plumb for additional openings through
the roof. In all cases, the opening must provide a
minimum of 1” (25 mm) clearance to the vent pipe,
i.e., the hole must be at least 9³⁄₈” x 9³⁄₈” (240 x
240mm).
5. Place fireplace into position.
6. Place firestop(s) #7DVFS or Attic Insulation Shield
#7DVAIS into position and secure. (Fig. 34)
7. Install roof support (Fig. 32) and roof flashing making
sure upper flange is below the shingles. (Fig. 33)
8. Install appropriate pipe sections until the venting is
above the flashing. (Fig. 33)
9. Install storm collar and seal around the pipe. (Fig.
33)
10. Add additional vent lengths for proper height. (Fig.
31)
The enlarged ends of the vent section always
face downward.
11. Apply high temperature sealant to 4” and 7” collars
of vertical vent termination and install.
Vertical Through-The-Roof Installation
• The minimum height of the vent above the highest
point of penetration through the foof is 24” (610 mm)
(Fig. 31)
Max. 10' (3m)
Max. Height 40' (12.2m)
Min. Height 8' (2.4m)
Max.
Height 40' (12.2m)
Min.
Height 8' (2.4 m)
Max. 10' (3m)
Support straps
every 36" (914mm)
FP1387
Fig. 29 Support for horizontal runs.
1
2
3
4
1
2
3
4
1 + 2 + 3 + 4 = 270
o
FP1389
Fig. 30 Maximum elbow usage.
Min.
2' (610 mm)
FP1389
Fig. 31 Minimum termination to roof clearance.
FP1184
Typical roof/ceiling
support apps.
Typical Roof Sup-
port Application
Typical Ceiling Sup-
port Application FP1184
Fig. 32 Venting supports.

19
DVRTSB Bay Window Fireplace
10003848
If there is a room above ceiling level,
firestop spacer must be installed on both
the bottom and the top side of the ceiling
joists. (Fig. 34) If an attic is above ceiling
level a 7DVAIS (Attic Insulation Shield)
must be installed.
TWL101a
Twist Lock Pipe
2/8/99 djt
3 #5 Sheet Metal
Screws per Joint
Sealant
Storm Collar
TWL101a
Fig. 33 Roof flashing.
FP1029
attic insulation shield
firestop spacers
1/28/00 djt
Attic Insulation
Shield
Upper Floor 11”
(279mm)
Joist
Firestop Spacer
Nails (4) FP1029
Fig. 34 Attic insulation shield and firestop spacer installation.
11”
(279mm)

20
DVRTSB Bay Window Fireplace
10003848
Twist Lock Venting Components
Starter Kit-Model 7TDVSK-Sidewall/Rearwall Venting
Starter Kit-Model 7TDVSKV-Vertical Venting
for 7TDVSKV-A order 1/12 to 6/12 roof pitch
for 7TDVSKV-B order 7/12 to 12/12 roof pitch
for 7TDSKV-F order flat roof
Starter Kit-Model 7TDVSKS-Snorkel Kit
for Below Grade Installation
45˚ Elbow
7TDV45 for Rear Vent to Vertical Vent
or Vertical/Horizontal Offsets
90˚ Transition Elbow
7TDVRT90 for Rear Vent to Vertical Vent
90° Elbow
7TDV90 Vertical/Horizontal Offset
Telescopic vent sections
7TDVP1218 -12” to 18” adjustible length
7TDVP3564 -35” to 64” adjustible length
Pipe sections for vertical or horizontal venting
Model 7TDVP8” 4 per box
Model 7TDVP12” 4 per box
Model 7TDVP24” 4 per box
Model 7TDVP36”
Model 7TDVP48”
Firestop Spacer
Model 7DVFS
Attic Insulation Shield
Model 7DVAIS
Vertical/Horizontal Combination Offset Support
Model 7DVCS
7TBSG 7”T.L. DVRTSB
Termination Screen Guard Kit
584B
Vent components
Starter Kit
2/25/99 djt
584C
Vent components
45 degree elbow
2/25/99 djt
10/20/99 twistlock
584D
Vent Components
90 degree elbow
2/25/99 djt
10/20/99 twist lock
584E
Venting Components
Telescope vent
2/25/99 djt
10/20/99 twist lock
584F
Venting Components
Pipe sections
2/25/99 djt
10/20/99 twist lock
584G
Venting Components
Firestop spacer
2/25/99 djt
584H
Venting components
attic insulation shield
2/25/99 djt
584I
vent components
offset support
2/25/99 djt