MHSC CDVR33N/PV7 User manual
69D3011 11/09 Rev. 6
Installation and Operating
Instructions
693011
CDVRT7 cover
CDV7 Series Gas Fireplace
69D3011
High Elevations ...................................................... 5
Gas Pressures ....................................................... 5
Gas Specifications, Orifice Sizes ........................... 5
Fireplace & Framing Dimensions ........................... 6
Before You Start ..................................................... 8
Fireplace Framing ................................................. 8
Fireplace Location .................................................. 9
Finishing Material ..................................................11
General Venting
Termination Location ..................................... 13
Termination Clearances ................................. 14
Assembling Vent Pipes .................................. 14
How to Use the Vent Graph ........................... 15
Vent Pipe Clearances .................................... 16
Rear Vent Applications & Installation ................... 17
Vertical Sidewall Applications & Installation ......... 18
Below Grade Installation ......................................
Vertical Through-the-Roof
Applications & Installation ..............................
Check Gas Type................................................... 5
Installing Gas Piping to
Fireplace/Burner System Location ................ 5
Remote Wall Switch ............................................. 8
Optional DC Remote Systems ............................. 8
Electronic Pilot Ignition Wiring ............................. 9
Optional Fan/Blower Systems .............................. 9
Rockwool Placement ........................................... 30
Log Placement ..................................................... 31
Lava Rock and Ember Placement ....................... 31
What To Do If You Smell Gas ............................... 3
Lighting Pilot for the First Time ............................ 3
Lighting Pilot ........................................................ 33
Lighting Burner ..................................................... 34
To Turn Off Gas .................................................... 34
What To Do If You Smell Gas ............................... 35
Lighting Electronic Ignition ................................... 35
To Turn Off Gas .................................................... 35
Burner, Pilot and Control Compartment ............... 36
Pilot Flame ........................................................... 36
Burner Flame ....................................................... 36
Vent System ......................................................... 37
Glass Door ........................................................... 37
Logs ..................................................................... 37
Rock Wool ........................................................... 37
Firebox Components ............................................ 41
Standing Pilot - Millivolt Control ........................... 43
Electronic Ignition ................................................. 45
Logs ..................................................................... 46
Vent Components ................................................ 47
CDV7 Series Gas Fireplace
69D3011 3
4. Never install the fireplace
• in a recreational vehicle
• where curtains, furniture, clothing, or other flam-
mable objects are less than 4" 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 cleaning
may be needed due to excessive lint and dust. Turn off
the gas valve and pilot light before cleaning fireplace.
10. Have venting system inspected annually by a quali-
fied service person. If needed, have venting system
cleaned or repaired. See Cleaning and Maintenance,
page 40.
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 decora-
tions on or around fireplace.
1. 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.
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 dis-
ease 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.
. 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.
Continued on page 4
INSTALLER
Please leave these instructions with the appliance.
OWNER
Please retain these instructions for future reference
.
• Read this owner’s manual carefully and completely before trying to assemble, operate,
or service this fireplace.
• Any change to this fireplace or its controls can be dangerous.
• Improper installation or use of this fireplace can cause serious injury or death from
fire, burns, explosions, electrical shock and carbon monoxide poisoning.
CDV7 Series Gas Fireplace
469D3011
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 person to arrange for replacement of the unit.
19. Do not operate fireplace if any log is broken.
0. Do not use a blower insert, heat exchanger insert, or
any other accessory not approved for use with this
fireplace.
1. 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 Z1.88b-008 / CSA .33b-008 STANDARDS
A manufactured home (USA only) or mobile home OEM installation must conform with the
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.
Never connect unit to private (non-utility)
gas wells. This gas is commonly known
as wellhead gas.
CDV7 Series Gas Fireplace
69D3011 5
• 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 Z3.1/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 installations.
• This appliance is approved to be vented with Simpson-
Duravent and MHSC Twist-Lock Direct Vent Compo-
nents.
FP2284a
CDV7 controls
Off/Pilot/On Knob
Remote Control
Switch Receiver
Figure 1 -
CDV7 Series Fireplace
Hi/Lo Knob
Blower
Control
On/Off/RS
Switch
Ignitor
FP84
The classification “noncombustible material” includes, but
is not limited to stone, brick and mortar. Noncombustibles
are safe to overlay the black-painted metal face (includ-
ing radiant plates) and do not pose a fire hazard. Do not
allow any noncombustible finish material to extend past or
interfere with fireplace opening.
The classification “combustible material” includes, but is not
limited to plywood, drywall and particle board. Combustible
materials may contact the sides, bottom or back of firebox.
Do not overlay the black painted face with combustible
materials.
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,
installations must be in accordance with the current
ANSI Z3.1/NFPA 54 and/or local codes having juris-
diction.
In Canada, please consult provincial and/or local authori-
ties having jurisdiction for installations at elevations
above 4,500 feet (1,370 m).
Max.Input Min. Input Orifice
Model Fuel BTU/h BTU/h Size
CDVR33NV7 Nat. 18,000 13,000 #45
CDVR33PV7 LP 18,000 13,000 1.8 mm
CDVR33NE7 Nat. 18,000 13,000 #45
CDVR33PE7 LP 18,000 13,000 1.8 mm
CDVR36NV7 Nat. 0,000 15,000 #44
CDVR36PV7 LP 0,000 15,000 1.35 mm
CDVR36NE7 Nat. 0,000 15,000 #44
CDVR36PE7 LP 0,000 15,000 1.35 mm
CDVR4NV7 Nat. 4,000 17,000 .35 mm
CDVR4PV7 LP 4,000 18,000 1.45 mm
CDVR4NE7 Nat. 4,000 17,000 .35 mm
CDVR4PE7 LP 4,000 18,000 1.45 mm
CDVR47NV7 Nat. 4,000 17,000 .35 mm
CDVR47PV7 LP 4,000 18,000 1.45 mm
CDVR47NE7 Nat. 4,000 17,000 .35 mm
CDVR47PE7 LP 4,000 18,000 1.45 mm
CDVT33NV7 Nat. 18,000 13,000 #45
CDVT33PV7 LP 18,000 13,000 1.8 mm
CDVT33NE7 Nat. 18,000 13,000 #45
CDVT33PE7 LP 18,000 13,000 1.8 mm
CDVT36NV7 Nat. 0,000 15,000 #44
CDVT36PV7 LP 0,000 15,000 1.35 mm
CDVT36NE7 Nat. 0,000 15,000 #44
CDVT36PE7 LP 0,000 15,000 1.35 mm
CDVT4NV7 Nat. 4,000 17,000 .35 mm
CDVT4PV7 LP 4,000 18,000 1.45 mm
CDVT4NE7 Nat. 4,000 17,000 .35 mm
CDVT4PE7 LP 4,000 18,000 1.45 mm
CDVT47NV7 Nat. 4,000 17,000 .35 mm
CDVT47PV7 LP 4,000 18,000 1.45 mm
CDVT47NE7 Nat. 4,000 17,000 .35 mm
CDVT47PE7 LP 4,000 18,000 1.45 mm
Natural Propane (LP)
Inlet Minimum 5.5” w.c. 11.0” w.c.
Inlet Maximum 14.0” w.c. 14.0” w.c.
Manifold Pressure 3.5” w.c. 10.0” w.c.
CDV7 Series Gas Fireplace
669D3011
Figure 2 -
CDVR Series Fireplace Dimensions
G
F
H
A
J
C
Q
D
E
156M”
15/16”
P - Minimum Rough Opening Width
Minimum Rough
Opening
Depth
1/2” 5/8”
5/8”
1/2”
Minimum Rough
Opening
Height
C
L
5/8”
1/2”
5/8”
1/2”
IK
L
M
O
M
N
B
693011
CDVR7 DIMS
A 33" 37Z\zn" 41" 47"
B 35B\," 38B\," 38B\," 38B\,"
C 31ZZ\zn" 34>\zn" 34>\zn" 34>\zn"
D 7C\zn" 9Z\zn" 33Z\zn" 39Z\zn"
E 15C\zn" 0C\," 0C\," 0C\,"
F 13ZZ\zn" 15C\v" 15C\v" 15C\v"
G 1C\," 1M\," 5M\," 31M\,"
H 1ZB\zn" 5Z\v" 5Z\v" 5Z\v"
I 9M\," 3" 36" 4"
J B\zn" C\," C\," C\,"
K 7C\zn" 5M\zn" 5M\zn" 5M\zn"
L 48C\v" 5M\zn" 56M\zn" 6M\zn"
M 34Z\x" 37Z\zn" 39ZZ\zn" 43M\,"
N 4C\," 6Z\v" 8Z\v" 31Z\v"
O 13ZZ\zn" 15Z\v" 15Z\v" 15Z\v"
P 33Z\v" 37Z\x" 41Z\v" 47Z\v"
Q 35M\," 39" 39" 39"
CDV7 Series Gas Fireplace
69D3011 7
G
F
H
A
J
C
R
D
E
156M”
15/16”
Q - Minimum Rough Opening Width
P
Minimum Rough
Opening
Depth
1/2” 5/8”
5/8”
1/2”
Minimum Rough
Opening
Height
5/8”
1/2”
5/8”
1/2”
I
K
L
M
O
N
N
B
693011
CDVT7 top dims
Figure 3 -
CDVT Series Fireplace Dimensions
A 33" 37Z\zn" 41" 47"
B 35B\," 38B\," 38B\," 38B\,"
C 31ZZ\zn" 34>\zn" 34>\zn" 34>\zn"
D 7C\zn" 9Z\zn" 33Z\zn" 39Z\zn"
E 15C\zn" 0C\," 0C\," 0C\,"
F 14C\zn" 15C\v" 15C\v" 15C\v"
G 1C\," 1M\," 5M\," 31M\,"
H 10ZZ\zn" 10ZB\zn" 1ZB\zn" 15ZB\zn"
I 6Z\x" 6Z\x" 6Z\x" 6Z\x"
J 9M\," 3" 36" 4"
K B\zn" C\," C\," C\,"
L 7C\zn" 5M\zn" 5M\zn" 5M\zn"
M 48C\v" 5M\zn" 56M\zn" 6M\zn"
N 34Z\x" 37Z\zn" 39ZZ\zn" 43M\,"
O 4C\," 6Z\v" 8Z\v" 31Z\v"
P 13ZZ\zn" 15Z\v" 15Z\v" 15Z\v"
Q 33Z\v" 37Z\x" 41Z\v" 47Z\v"
R 35M\," 39" 39" 39"
CDV7 Series Gas Fireplace
869D3011
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)
• Log Set
• Volcanic Rock
• Rock Wool
• Phillips Screwdriver • Framing Materials
• Hammer • Wall Finishing Materials
• Saw and/or saber saw • Level
• Electric Drill and Bits • Tee Joint
• Pliers • Measuring Tape
• Square • Pipe Wrench
• Caulking Material (Noncombustible)
• Fireplace Surround Material (Noncombustible)
• Piping Complying with Local Codes
• Pipe Sealant Approved for use with Propane/LPG
(Resistant to Sulfur Compounds)
Firebox framing can be built before or after the appliance
is set in place. Construct firebox framing following Figure 2
for your specific installation requirements. Refer to Figure
2 for firebox dimensions. The framing headers may rest
on the top of the firebox standoffs.
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.
Do not fill spaces around firebox with
insulation or other materials.This could cause
a fire.
Firebox framing can be built before or after the appliance
is set in place. Construct firebox framing following Figure 3
for your specific installation requirements. Refer to Figure
3 for firebox dimensions. The framing headers may rest
on the top of the firebox standoffs.
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.
COLD CLIMATE INSULATION
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.
CDV7 Series Gas Fireplace
69D3011 9
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. Refer to
Figure 4 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. See National Fuel Gas Code ANSI Z33.1/NFPA 54
— (current edition), the Uniform Mechanical Code — (current edition), and Local Building Codes
for specific installation requirements.
Figure 4 -
Locating Gas Fireplace
** Island (C) and room divider (D) installation is possible as long
as the horizontal portion of vent system (X) does not exceed
0'.
* When you install your fireplace in (D) room divider or (E)
flat on wall corner positions (Y), a minimum of 4" clearance
must be maintained from perpendicular wall and front of
fireplace.
Y
EAB
C
D
F
YB
X
LU584-1
Locating unit
2/4/99 djt
A Flat on Wall
B Cross Corner
C Island**
D Room Divider*
E Flat on Wall Corner*
F Chase Installation
Y 4" Minimum
CDV7 Series Gas Fireplace
10 69D3011
CLEARANCES TO COMBUSTIBLES
Follow these instructions carefully to ensure safe installation. Failure to follow
instructions exactly can create a fire hazard.
The appliance cannot be installed on a carpet, tile or other combustible material
other than wood flooring. If installed on carpet or vinyl flooring, the appliance
shall be installed on a metal, wood or noncombustible material panel extending
full width and depth of the appliance.
12"
Maximum
Depth
72"
Minimum
6”
Minimum
13”
Minimum
fP2032
wall clearances
Figure 5 -
Ceiling and Side Wall Clearances
FP03
Ceiling
Side
Wall
Combustible Mantel
FP2285
mantel clearances
12”
8”
6”
2”
13"
7”
5”
3”
Finish Wall
Insulation Board
Header
Stud
Standoff
Top of Heat
Exhaust Vent
FP85
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 6 -
Mantel Clearances
Never obstruct or modify the air inlet or
outlet grilles (louvers). This may create a
fire hazard.
6"
5"
3" 45°
1"
256O”
156O”
356O”
456O”
FP2286
Mantel leg clear
Side of Fireplace
Opening
Stud
Wall
FP86
Combustible
Material Area
CDV7 Series Gas Fireplace
69D3011 11
The fireplace must be secured to the
floor and/or to framing studs as shown
in Figure 7. Use two () 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/" or 5/8" to accom-
modate different wall thickness.
Figure 7 -
Securing Fireplace to Floor and
Framing Studs (CDVT36 shown)
FP2287
secure fireplace
Screw
Framing
Framing
Nailing
Flange
Screws
Screw
Nailing
Flange
Nailing
Flanges
Drywall Support Tabs (Do
Not Use for Framing or
Header)
Screw
Screw
FP87
Any 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 surface of the appliance. 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.
CDV7 Series Gas Fireplace
1 69D3011
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 vent-
ing system. The installer must follow these safety rules:
• Wear gloves and safety glasses for protection.
• Use extreme caution when using ladders or when on
rooftops.
• Be aware of electrical wiring locations in walls and
ceilings.
The following actions will void the warranty on your vent-
ing 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 instruc-
tions.
Read all instructions completely and thoroughly before attempting installation. Failure
to do so could result in serious injury, property damage or loss of life. Operation of
improperly installed and maintained venting system could result in serious injury,
property damage or loss of life.
Failure to follow these instructions will
void the warranty.
Your fireplace is approved to be vented either through the
side wall, or vertical through the roof.
•
• Flexible UL1777 listed venting may be used in any
venting application where rigid direct vent components
can be used. All restrictions, clearances and allowanc-
es that pertain to the rigid piping apply to the flexible
venting.
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 adapt-
ers. This may occur only if doing so does not violate
any of the venting length, height, routing, horizontal to
vertical raito requirements or clearance considerations
detailed in this manual.
• Venting terminals shall not be recessed into a wall or
siding.
• Horizontal venting which incorporates the twist lock
pipe must be installed on a level plane without an in-
clining or declining slope.
• Horizontal venting which incorporates the use of flex
venting shall have an inclining slope from the unit of 1”
(5 mm) per 4” (610 mm).
There must not be any obstruction such as bushes, gar-
den sheds, fences, decks or utility buildings within 4”
(610 mm) from the front of the termination hood.
Do not locate termination hood where excessive snow or
ice build up may occur. Be sure to check vent termina-
tion area after snow falls, and clear to prevent accidental
blockage of venting system. When using snow blowers,
make sure snow is not directed towards vent termination
area.
It is imperative the vent termination be located observing
the minimum clearances as shown on following page.
Z\x
CDV7 Series Gas Fireplace
69D3011 13
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
Fixed
Closed
Operable
Operable Fixed
Closed
V
B
CFM145a
DV Termin Location
5/01/01 Rev. 12/05/01
sta
INSIDE
CORNER DETAIL
V
A
G
CFM145a
A = Clearance above grade, veranda, porch, 1” (30 cm) 1” (30 cm)
deck, or balcony
B = Clearance to window or door that may be 6” (15 cm) for appliances 6” (15 cm) for appliances
opened < 10,000BTU/h (3kW), 1” (30 cm) < 10,000 BTU/h (3kW), 9”
for appliances > 10,000 Btuh (3kW) and (3 cm) for appliances > 10,000
< 100,000 BTU/h (30kW), 36” (91 cm) Btuh (3kW) and < 50,000 BTU/h
for appliances > 100,000 BTU/h (30kW) (15kW), 1” (30 cm) for
appliances > 50,000 BTU/h(15kW)
C = Clearance to permanently closed window 1” (305 mm) recommended to 1” (305 mm) recommended to
prevent window condensation prevent window condensation
D = Vertical clearance to ventilated soffit located
above the terminal within a horizontal 18” (458 mm) 18” (458 mm)
distance of ’ (610mm) from the center
line of the terminal
E = Clearance to unventilated soffit 1” (305 mm) 1” (305 mm)
F = Clearance to outside corner see next page see next page
G = Clearance to inside corner (see next page) see next page see next page
H = Clearance to each inside of center line 3’ (91 cm) within a height of 15’ (5 m) 3’ (91 cm) within a height of 15’
extended above meter/regulator assembly above the meter/regulator assembly (5 m) above the meter/regulator
assy
I = Clearance to service regulator vent outlet 3’ (91 cm) 3’ (91 cm)
J = Clearance to nonmechanical air supply inlet 6” (15 cm) for appliances < 10,000 6” (15 cm) for appliances
to building or the combustion air inlet to any BTU/h (3kW), 1” (30 cm) for < 10,000 BTU/h (3kW), 9”
other appliances appliances > 10,000 BTU/h (3kW) and (3 cm) for appliances > 10,000
< 100,000 Btuh (30kW), 36” (91 cm) BTU/h (3kW) and < 50,000 BTU/h
for appliances > 100,000 BTU/h (30kW) (15kW), 1” (30 cm) for
appliances > 50,000 BTU/h(15kW)
K = Clearance to a mechanical air supply inlet 6’ (1.83 m) 3’ (91 cm) above if within 10'
(3 m) horizontally
L = Clearance above paved sidewalk or paved 7’ (.13 m)† 7’ (.13 m)†
driveway located on public property
M = Clearance under veranda, porch, deck or 1” (30 cm) 1” (30cm)
balcony
1 In accordance with the current CSA-B149 Installation Codes
In accordance with the current ANSI Z3.1/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 sides beneath the floor:
NOTE: 1. Local codes or regulations may require different
clearances.
. 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. MHSC assumes no responsibility for the improper
performance of the appliance when the venting system
does not meet these requirements.
Figure 8 -
Termination Locations
CDV7 Series Gas Fireplace
14 69D3011
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’ (914 mm) x DActual
6’ (1.8 m) 1 x DActual
3 9’ (.7 m) /3 x DActual
4 1’ (3.7 m) 1/ x DActual
DMin. = # of Termination caps x 3
CMax. = ( / # termination caps) x DActual
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. . 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.
The venting system must conform to local codes and/or
the current National Fuel Code ANSI Z3.1/NFPA 54.
Only venting components manufactured by MHSC may
be used in Direct Vent systems.
The venting system must be installed in accordance with
the current CSA-B149.1 installation code.
Before joining the flex vent pipe to the unit, apply a bead
of high temperature sealant* (provided) to the 4” pipe
exiting the fireplace. Secure flex vent pipe in place with
a hose clamp (provided).
*Be sure the flex pipe overlaps at least 1” (5 mm) onto
the collars of the fireplace and termination. If the termi-
nation has an internal bead, be sure to overlap and se-
cure 1” (5 mm) past the bead.
* Be sure the vent is actually crushed before proceeding.
Apply a tug to be sure the vent will not slip off the collars.
Repeat process with 7” flex vent pipe. The same proce-
dure must be performed on the vent side.
FP2290
flex vent
Apply High Temperature
Sealant
Hose Clamp
FP90
Figure 10 -
Apply high temperature sealant to 4” and 7” pipes.
Figure 9 -
Termination Clearances
CDV7 Series Gas Fireplace
69D3011 15
When using 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.
To join twist lock pipes together, simply align the beads of the male end with the grooves of the fe-
male end, twisting the pipe until the flange on the female end contacts 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. Figure 11
To make it easier to assembly the joints, we suggest putting a lubricant (Vaseline or similar) on the
male end of the twist lock pipe prior to assembly.
TWL100
Twist Lock Pipe
3/12/99 djt
Male End Female End
Screw Holes
TWL100
Figure 11 -
Twist-lock Pipe Joints
The Vent Graph should be read in conjunction with the
following vent installation instructions to determine the re-
lationship 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 di-
mension on the Sidewall Vent Graph, Figure 12, locate
the point intersecting with the slanted graph line.
. 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.
If the vertical dimension from the floor of the unit is 11’ (3.4
m) the horizontal run to the face of the outer wall must not
exceed 14’ (4.3 m).
If the vertical dimension from the floor of the unit is 7’ (.1
m), the horizontal run to the face of the outer wall must not
exceed 8’ (.4 m).
Page 22
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
FP2291
vent graph
X
Vertical Dimension from the Floor of Unit to the Center of
the Horizontal Vent Pipe
Horizontal Dimension From the Outside of Termination to
the Back of the Fireplace
Figure 12 -
Side Wall Venting Graph
X = " minimum for 33" Model
X = 5Z\v" minimum for 36", 4" and 47" Models
(Floor to center of horizontal pipe)
CDV7 Series Gas Fireplace
16 69D3011
3" 1"
1"
1"
FP2288
TV rear vent
Figure 13 -
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
until
the flue penetrates the outside wall.
until
the flue penetrates the outside wall.
1"
3" 1"
1"
FP2289
RV rear vent
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
FP88
FP89
CDV7 Series Gas Fireplace
69D3011 17
When installed as a rear vent unit this appliance may be
vented directly to a termination located on the rear wall
behind the appliance.
• Only MHSC venting components are approved to be
used in these applications (Refer to ‘Venting Compo-
nents’ listed for different installation requirements).
• The maximum horizontal distance between the rear of
the appliance (or end of the transition elbow in a cor-
ner application) and the outside face of the rear wall is
0” (508 mm). Figure 14
• Only one 45° elbow is allowed in these installations.
• Minimum clearances between vent pipe and combus-
tible materials are as follows:
Top - 3” (76 mm)
- except at outside wall 1" (5 mm)
Sides - 1” (5 mm)
Bottom - 1” (5 mm)
FP2292
rear vent top vu
20”
(508 mm)
Max.
Figure 14 -
Rear Vent Application, No Elbows
Locate and cut the vent opening in the wall.
For combustible walls first frame in opening. Figure 15
When using flex vent, the opening will have to be
measured according to the 1” (5 mm) rise in 4” (610
mm) vertical run.
Cut a 9B\,”H x 9B\,” W (44 x 44
mm) hole through the exterior wall and frame as shown.
Figure 15
Hole opening should be 7Z\x”
(191 mm) diameter.
Secure firestop to the inside frame, center in the 9B\," x
9B\," vent opening.
Measure the horizontal length requirement for the venting
including a ” (51 mm) overlap, i.e. from the elbow to the
outside wall face plus ” (51 mm). Figure 14
Install the 4” (10 mm) vent to the appliance collar and
secure with 3 sheet metal screws. Install the 7” (178 mm)
vent pipe to the appliance collar and secure with 3 sheet
metal screws. It is not necessary to seal this connection.
If a 45° elbow is being used attach the elbow to the appli-
ance in the same manner then attach the venting to the
elbow.
Guide the venting through the vent hole as you place the
appliance in its installed position. Guide the 4” (10 mm)
and 7” (178 mm) collar 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 termination, remove
and realign the venting at the appliance flue collars. Fig-
ure 16. Attach the termination to the wall as outlined in the
instruction sheet supplied with the termination.
VO584-100
Vent Opening
2/99 djt
9B\,”
(44 mm)
Min.
Fireplace Hearth Framing Detail
7Z\x”
(190 mm)
Fireplace Hearth
FP93
Figure 15 -
Locate vent opening on wall.
9B\,”
(44 mm) Min.
CDV7 Series Gas Fireplace
18 69D3011
FP2294
Side View Vent Termination
1/25/00 djt
Finish Wall
Vent
Termination
FP94
Figure 16 -
Side View of Final Unit Location
Follow Steps 1 and on Page 17.
Install the 4” (10 mm) flex vent pipe to the appliance col-
lars described in “General Information Assembling Vent
Pipes”, Page 1. If the installation requires a 45° angle,
grasp the vent pipe close to the appliance collar and bend
to 45°. DO NOT exceed 45°. Figure 17
Install the 7” vent pipe in the same manner as Step .
There must be a 1/” (13 mm) rise in a 1” (305
mm) length of flex vent.
Assemble the flex vent to the collars on the termination as
you did on the appliance.
FP1473
corner flex install
4/04 djt
Termination
Flex Section
Appliance Collars
FP1473
Figure 17 -
Grasp the vent pipe close to the collar
and bend to 45° angle. do not exceed 45°.
FP1472
rise in length
4/04 djt
Rise
FP147
Figure 18 -
There must be a 1/2" rise per foot length
For all top vent installations where a 90° elbow
is the first pipe piece towards a sidewall termination (up
and out), an open-center ringed flue restrictor must be
installed onto the top edge of the firebox flue adapter. To
create this open-center re-
strictor, twist and break off
the center rib of the supplied
flue restrictor. The installed
part should appear similar
to that show n in Figure 19.
The Vent Graph, showing the relationship between verti-
cal and horizontal side wall venting, will help to determine
the various dimensions allowable.
When vent termination exits through foundations less
than 0” (508 mm) below siding outcrop, the vent pipe
must flush up with the siding.
It is best to locate the fireplace in such a way that mini-
mizes 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 outer wall.
Horizontal plane means no vertical rise exists on this por-
tion of the vent assembly.
FP2303
CDV7 rear restrictor
3/09
Figure 19 -
Top Vent Vertical Sidewall
Restrictor
FP303
CDV7 Series Gas Fireplace
69D3011 19
• The maximum number of 90° elbows per side wall in-
stallation is three (3). Figure 20
• If a 90° elbow is fitted directly on top of the fireplace
flange the maximum horizontal vent run before the ter-
mination or a vertical rise is 36” (914 mm). Figure 21
• If a 90° elbow is used in the horizontal vent run (level
height maintained) the horizontal vent length is re-
duced by 36” (914 mm). Figures 21 & 22. This does
not apply if the 90° elbows are used to increase or
redirect a vertical rise. Figure 20
According to the vent graph (Page 15) the
maximum horizontal vent length in a system with a 7Z\x’
(.3 m) rise is 0’ (6 m) and if a 90° elbow is required in
the horizontal vent it must be reduced to 17’ (5. m).
In Figures 23 & 24, dimension A plus B must not be great-
er than 17’ (5.m)
• The maximum number of 45° elbows permitted per in-
stallation is six (6). 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”
(457 mm). This does not apply if the 45° elbows are
installed on the vertical part of the vent system.
• The maximum number of elbow degrees in a system is
70°. Figure 24
Example: Elbow 1 = 90°
Elbow = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total angular variation = 70°
3 x 90°
Elbows
3 x 90°
Elbows
FP1176
Figure 20 -
Maximum three (3) 90° elbows per installation
Max 20"
Max 20"
36"
(914mm)
Max.
36"
(914mm)
Max.
FP1177
Figure 21 -
Maximum horizontal run with no rise
7’6"
(2.3m)
AB
A + B = 17’ (Max.)
(5.2m)
FP1178 Figure 22 -
Horizontal Run Reduction
V584-201
Horizontal Run
2/99 djt
10’
(3 m)
7’
(.1 m)
7’6"
(.3 m)
V584-01
Figure 23 -
Maximum Vent Run with Elbows
1
2
3
4
1
2
3
4
FP1180
Figure 24 -
Maximum Elbow Usage
CDV7 Series Gas Fireplace
0 69D3011
Locate vent opening on the wall. It may be necessary to
first position the fireplace and measure to obtain hole lo-
cation. Depending on whether the wall is combustible or
noncombustible, cut opening to size. Figure 25 (For com-
bustible walls first frame in opening.)
When using flex vent, the opening will have to be
measured according to the 1/” (13 mm) rise in 1” (305
mm) vent run.
Cut a 9B\,”H x 9%\,”W (44 x 44 mm)
hole through the exterior wall and frame as shown. Figure
25
Hole opening must be 7Z\x” (191
mm) in diameter.
VO584-100
Vent Opening
2/99 djt
9B\,”
(44 mm)
Fireplace Hearth Framing Detail
7Z\x”
(190 mm)
Fireplace Hearth
FP93
Figure 25 -
Locate Vent Opening on Wall
9B\,”
(44 mm)
Secure firestop to the inside frame, center in the 9B\," x
9B\," vent opening.
Place fireplace into position. Measure the vertical height
(X) required from the base of the flue collars to the center
of the wall opening. Figure 26
XX
FP1181
Figure 26 -
Vertical Height Requirements
Using appropriate length of pipe section(s) attach to fire-
place with three (3) screws. Follow with the installation of
the inner and outer elbow, again secure joints with three
(3) sheet metal screws.
Measure the horizontal length requirement including a ”
(51 mm) overlap, i.e. from the elbow to the outside wall
face plus ” (51 mm) (or the distance required if installing
a second 90° elbow). Figure 27
X
X
FP118
Figure 27 -
Horizontal Length Requirement
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