Century Jefferson User Manual
INSTALLER / CONSUMER
CERT IF IED
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SAFETY INFORMATION
PLEASE READ THIS MANUAL
BEFORE INSTALLING AND USING
APPLIANCE.
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.
Jefferson
Direct Vent/Natural Vent
Gas Heater
FOR YOUR SAFETY
Installation and service must be
performed by a qualified installer,
service agency or the gas suppler.
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 supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
DO NOT STORE OR USE
GASOLINE OR OTHER
FLAMMABLE VAPORS AND
LIQUIDS IN THE VICINITY OF THIS
OR ANY OTHER APPLIANCE.
This appliance may be installed in an
after market permanently located
manufactured (mobile) home where not
prohibited by local codes.
Model: JDVBRN
Homeowner’s Installation
and Operating Manual
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.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
30004177 2/08 Rev. 1
Jefferson Direct Vent/Natural Vent Gas Heater
Table of Contents
PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING APPLIANCE.
Thank you and congratulations on your purchase of a CFM Corporation stove.
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.
Installation & General Information, Cautions, Warnings ....................................................................3
Operating Instructions Installation Requirements for the Commonwealth of Massachusetts ..........................4
Stove Dimensions .......................................................................................................
Installation Requirements ...........................................................................................
Locating the Stove ......................................................................................................
Clearance Requirements ............................................................................................
Parallel Installation ......................................................................................................
Corner Installation .......................................................................................................
Wall and Ceiling Clearances .......................................................................................
Hearth Requirements ..................................................................................................
Gas Specifications ......................................................................................................
Gas Inlet and Manifold Pressures ...............................................................................
High Elevations ...........................................................................................................
Horizontal Termination - Direct Vent ONLY .................................................................
Vertical Termination - Direct Vent ONLY .....................................................................
Vent Termination Clearances ......................................................................................
General Venting Information - Termination Location ................................................. 11
Termination Clearances ............................................................................................
Venting Requirements - Natural Vent ONLY .............................................................
Venting Requirements and Options - Direct Vent ONLY ...........................................
Assembly Procedures Tools Required ..........................................................................................................
Unpack the Stove ......................................................................................................
Install Optional Fan ...................................................................................................
Venting System Assembly - Direct Vent ....................................................................
Install Vent Adapter Pipe (CFM Corporation Components) ......................................
Install Vent Adapter Pipe (Simpson Dura-Vent Components) ...................................
Side Wall Termination Assembly ...............................................................................
Vent Termination Below Grade .................................................................................
Vertical (Through the Roof) Vent Assembly ..............................................................
Venting System Assembly - Natural Vent .................................................................
Install the Vent Pipe ..................................................................................................
Install Log Set ...........................................................................................................
Connect Gas Supply Line .........................................................................................
Air Shutter Adjustment ...............................................................................................
Complete the Assembly .............................................................................................
Install ON/OFF Switch ..............................................................................................
Install the Stove Front ................................................................................................
Thermostat Connection (Optional) ............................................................................
Operation Your First Fire ...........................................................................................................
Pilot and Burner Inspection .......................................................................................
Flame & Temperature Adjustment .............................................................................
Flame Characteristics ...............................................................................................
Lighting and Operating Instructions ..........................................................................
Troubleshooting - Honeywell #8420 Gas Control System ........................................
Fuel Conversion Instructions ....................................................................................
Maintenance Annual System Inspection ........................................................................................
Logset and Burner/Cleaning and Inspection .............................................................
Care of Cast Iron .......................................................................................................
Cleaning the Glass ...................................................................................................
Glass Replacement ...................................................................................................
Gasket Replacement ................................................................................................
Inspect the Vent System Annually ............................................................................
Check the Gas Flame Regularly ...............................................................................
Wiring Diagrams .......................................................................................................
Replacement Parts
Optional Accessories
Warranty
Energuide ...................................................................................................................................40
...................................................................................................................................39
...................................................................................................................................33
...................................................................................................................................35
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30004177
Installation & Operating Instructions
The Jefferson Direct Vent/Natural Vent Room Heater, Model No.
JDVBRN, is a vented gas appliance listed to the ANSI standard
Z21.88-2005 and CSA-2.33-2005 for Vented Room Heaters,
and CSA 2.17-M91, Gas-Fired Appliances For Use at High
Altitudes.
The installation of the Jefferson Direct Vent/Natural Vent Room
Heater must conform with local codes, or in the absence of local
codes, with National Fuel Gas Code, ANSI Z223.1/NFPA 54 — latest edition and CSA B-149.1 Installation Code. (EXCEPTION:
Do not derate this appliance for altitude. Maintain the manifold
pressure at 3.5 inches w.c. for Natural Gas and 10 inches w.c.
for LP gas at maximum input.)h 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.
Installation and replacement of gas piping, gas utilization
equipment or accessories, and repair and servicing of equip
ment shall be performed only by a qualified agency, preferably
NFI or WETT (Canada) certified. The term “qualified agency”
means any individual, firm, corporation, or company that
either in person or through a representative is engaged in
and is responsible for (a) installation or replacement of gas
piping, or (b), the connection, installation, repair, or servic
ing of equipment, who is experienced in such work, familiar
with all precautions required, and has complied with all the
requirements of the authority having jurisdiction.
The Jefferson Direct Vent/Natural Vent Room Heater should
be inspected before use and at least annually by a qualified
service agency. It is imperative that control compartments,
burners, and circulating air passageways of the appliance
be kept clean.
The Jefferson Direct Vent/Natural Vent Room Heater and its
individual shut-off valve must be disconnected from the gas
supply piping during any pressure testing of that system at test
pressures in excess of 1/2 psig (3.5 kPa).
The Jefferson Direct Vent/Natural Vent Room Heater must be
isolated from the gas supply piping system by closing its individual
manual shutoff valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than 1/2 psig.
An accessible tap is located above the pilot/On-Off knob for
checking the inlet pressure.
‘Direct Vent’ describes a sealed combustion system in which
incoming outside air for combustion and outgoing exhaust enter
and exit through two separate concentric passages within the
same sealed vent system. The system does not use room air
to support combustion. The Direct Vent system permits the gas
appliance to be vented directly to the outside atmosphere through
the side of the house or vertically through the roof. Conventional
venting systems (Natural Vent) take air from the room for combustion and vent the exhaust vertically through the roof to the
atmosphere.
This appliance is approved for bedroom installations in the U.S.
and Canada. Check local codes for natural vent requirements.
This appliance may be installed in an aftermarket* manufactured
(mobile) home, where not prohibited by state or local codes.
WARNING: Operation of this heater when not connected to a
properly installed and maintained venting system can result
in carbon monoxide (CO) poisoning and possible death.
Jefferson Direct Vent /Natural Vent Gas Heater
The Jefferson Direct Vent/Natural Vent Room Heater, when
installed, must be electrically grounded in accordance with lo
cal codes or, in the absence of local codes, with the National
Electrical Code ANSI/NFPA 70, (latest edition), or of the current
Canadian Electrical Code C22.1.
Due to high temperatures this appliance should be located
out of traffic and away from furniture and draperies.
WARNING: This appliance is hot while in operation. Keep
children, clothing, and furniture away. Contact may cause
burns or ignition of combustible materials.
Children and adults should be alerted to the hazards of high
surface temperatures and should stay away to avoid burns or
clothing ignition. Young children should be carefully super
vised when they are in the same room as the appliance.
Clothing or other flammable materials should not be placed
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on or near the appliance.
Any safety screen, glass or guard removed for servicing
an appliance must be replaced prior to operating the ap
pliance.
The appliance area must be kept clear and free from com
bustible materials, gasoline, and other flammable vapors
and liquids.
The flow of combustion and ventilation air must not be ob
structed. The installation must include adequate accessibility
and clearance for servicing and proper operation.
WARNING: Do not operate the Room Heater with the glass
panel removed, cracked or broken. Replacement of the panel
should be done by a licensed or qualified service person.
Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and
any gas control which has been under water.
Do not burn wood, trash or any other material for which this
appliance was not designed. This appliance is designed to
burn either natural gas or propane only.
This gas appliance must not be connected to a chimney flue
serving a separate solid-fuel burning appliance.
CAUTION: Label all wires prior to disconnection when
servicing controls. Wiring errors can cause improper and
dangerous operation.
Verify proper operation after servicing.
* Aftermarket: Completion of sale, nor for purpose of resale, from the
manufacturer.
Jefferson Direct Vent/Natural Vent
Certified to:
ANSI Z21.88-2005 / CSA 2.33-2005
Vented Gas Fireplace Heaters
Proposition 65 Warning: Fuels used in gas, woodburning
or oil fired appliances, and the products of combustion of
such fuels, contain chemicals known to the State of California to cause cancer, birth defects and other reproductive
harm.
California Health & Safety Code Sec. 25249.6
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30004177
3
Jefferson Direct Vent/Natural Vent Gas Heater
Installation & Operating Instructions
Requirements for 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 all side wall horizontally vented gas fueled
equipment installed in every dwelling, building or
structure used in whole or in part for residential
purposes, including those owned or operated by the
Commonwealth and where the side wall exhaust
vent termination is less than seven (7) feet above
finished grade in the area of the venting, including
but not limited to decks and porches, the following
requirements shall be satisfied:
Installation of Carbon Monoxide Detectors
At the time of installation of the side wall horizontal
vented gas fueled equipment, the installing plumber
or gas fitter shall observe that a hard wired carbon
monoxide detector with an alarm is installed on each
additional level of the dwelling, building or structure
served by the side wall horizontal vented gas fueled
equipment. It shall be the responsibility of the property
owner to secure the services of qualified licensed
professionals for the installation of hard wired carbon
monoxide detectors.
In the event that the side wall horizontally vented gas
fueled equipment is installed in a crawl space or an
attic, the hard wired carbon monoxide detector with
alarm and battery back-up may be installed on the next
adjacent floor level.
In the event that the requirements of this subdivision
can not be met at the time of completion of installation,
the owner shall have a period of thirty (30) days
to comply with the above requirements; provided,
however, that during said thirty (30) day period, a
battery operated carbon monoxide detector with an
alarm shall be installed.
Approved Carbon Monoxide Detectors
Each carbon monoxide detector as required in
accordance with the above provisions shall comply with
NFPA 720 and ANSI/UL 2034 listed and IAS certified.
Signage
A metal or plastic identification plate shall be
permanently mounted to the exterior of the building at
a minimum height of eight (8) feet above grade directly
in line with the exhaust vent terminal for the horizontally
vented gas fueled heating appliance or equipment. The
sign shall read, in print size no less than one-half (1/2)
inch in size, “GAS VENT DIRECTLY BELOW, KEEP
CLEAR OF ALL OBSTRUCTIONS”.
Inspection
The state or local gas inspector of the side wall
horizontally vented gas fueled equipment shall not
approve the installation unless, upon inspection, the
inspector observes carbon monoxide detectors and
signage installed in accordance with the provisions of
248 CMR 5.08(2)(a)1 through 4.
Exemptions
The following equipment is exempt from 248 CMR
5.08(2)(a)1 through 4:
• The equipment listed in Chapter 10 entitled
“Equipment Not Required To Be Vented” in the most
current edition of NFPA 54 as adopted by the Board;
and
• Product Approved side wall horizontally vented gas
fueled equipment installed in a room or structure
separate from the dwelling, building or structure
used in whole or in part for residential purposes.
MANUFACTURER REQUIREMENTS
Gas Equipment Venting System Provided
When the manufacturer of Product Approved side
wall horizontally vented gas equipment provides a
venting system design or venting system components
with the equipment, the instructions provided by the
manufacturer for installation of the equipment and the
venting system shall include:
• Detailed instructions for the installation of the venting
system design or the venting system components;
and
• A complete parts list for the venting system design or
venting system.
Gas Equipment Venting System NOT Provided
When the manufacturer of a Product Approved side
wall horizontally vented gas fueled equipment does
not provide the parts for venting the flue gases, but
identifies “special venting systems”, the following
requirements shall be satisfied by the manufacturer:
• The referenced “special venting system” instructions
shall be included with the appliance or equipment
installation instructions; and
• The “special venting systems” shall be Product
Approved by the Board, and the instructions for
that system shall include a parts list and detailed
installation instructions.
A copy of all installation instructions for all Product
Approved side wall horizontally vented gas fueled
equipment, all venting instructions, all parts lists
for venting instructions, and/or all venting design
instructions shall remain with the appliance or
equipment at the completion of the installation.
44
30004177
Jefferson Direct Vent /Natural Vent Gas Heater
28"
(724 mm)
24"
(610 mm)
3"
(76 mm)
14
"
(368 mm)
C
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8"
(203 mm)
Valve
Inlet
Jefferson Direct Vent/Natural Vent Stove Dimensions
See Page 6 for Flue Collar
Centerline Dimensions.
Fig. 1 Jefferson dimensions.
Attention
The Jefferson stove is shipped from the factory as a Direct Vent Gas Heater. This heater may be converted
into a Natural Vent unit in the field. If a Natural Vent Heater is desired, the CFM Corporation Z31B00 FSDHAG Draft Hood must be directly installed to the top of the unit according to the installation instructions.
The Draft Hood Adapter is available in the 7FSDHASK stove kit or as a separate item.
When the Jefferson stove is converted to Natural Vent, it uses 4” vent pipe. For aesthetic purposes the
CFM direct vent system may be used up to the ceiling.
4188
30004177
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Jefferson Direct Vent/Natural Vent Gas Heater
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Installation Requirements
The installation must conform with local codes or, in
the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 - latest edition. (EXCEPTION: Do not derate this appliance for altitude. Maintain the manifold pressure at 3.5” w.c. for Natural Gas,
and 10” w.c. for Propane).
In Canada, installation must be in accordance with the
current CSA B-149.1 Installation Codes and/or local
codes.
The installation should be done by a qualified
service person, preferably NFI or WETT (Canada)
certified who is familiar with the building codes and
installation techniques appropriate for your area to
accomplish a safe and effective installation.
Your dealer or your local gas supplier will be able to
refer a qualified service person.
WARNING: Due to high temperatures, the
HEATER should be located out of traffic and
away from furniture and draperies.
The surface of the Heater Is hot when it is in use.
Young children should be watched carefully when
they are in the same room when the Heater is in
use, and they should be taught to avoid the hot
surface. Keep any objects that can burn well away
from the Heater, and observe the recommended
clearances that follow.
Direct Vent System Only
A. Flat on corner wall
B. Room Divider
C. Island
Fig. 2 Possible stove locations.
D. Cross Corner
E. Flat on wall
ST207a
Clearance Requirements
Minimum Clearances to Combustible Materials
Measure side clearances as shown in Figures 3 and 4
from the outer edge of the cast iron stove top. Measure
rear clearances from the outermost surface of the steel
rear skirt.
The Jefferson heater is approved for installation into
an alcove constructed of combustible materials to the
dimensions and clearances shown on the next page.
The same clearances apply in a standard parallel installation.
Locating The Stove
In choosing a location for the stove, consider:
• The location of outside walls;
• Where additional heat is needed:
• Where family members gather most often;
• The vent system requirements.
NOTE: We do not recommend the use of wallpaper
next to this stove. Over time, radiant heat may cause
the wallpaper to shrink, or may adversely affect the
binders in the wallpaper adhesive.
66
WARNING:
• Always maintain required clearances
(air spaces) to nearby combustibles
to prevent fire hazard. Do not fill air
spaces with insulation. All venting components
must maintain a 1” (25 mm) clearance to combustible materials. Maintain a 6” (150 mm) clearance when using single wall pipe.
• The gas appliance and vent system must be
vented directly to the outside of the building
and never be attached to a chimney serving a
separate solid fuel or gas-burning appliance.
• Refer to the manufacturer’s instructions includ
ed with the venting system for complete installation procedures.
30004177
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Jefferson Direct Vent /Natural Vent Gas Heater
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Parallel Installation:
Minimum Clearance and Flue Centerline,
Direct Vent and Natural Vent
Stove Clearances A: 4” (102 mm)
B: 4” (102 mm)
Pipe Centerlines C: 14¹⁄₂” (369 mm)
D: 9” (229 mm)
Fig. 3 Parallel installation, minimum back and side clearances and flue centerlines.
ST128a
Wall Centerline from Floor
ST131a
Effective Minimum
Wall Thimble 58
Centerline 54³⁄₄” (1378 mm) (Simpson Duravent Pipe)
Fig. 5 Minimum wall thimble centerline.
¹⁄₄” (1480 mm) (CFM Pipe)
Wall and Ceiling Clearances
Corner Installation: Minimum Clearance and
Flue Centerline, Direct Vent & Natural Vent
ST101a
A: Rear Wall 4” (102 mm)
B: Min. Clearance 43
C: Min. Alcove Height 72” (1830 mm)*
D: Max. Alcove Depth 48” (1220 mm)
Sidewall clearance 4” (102 mm)
* needed for installing DuraVent Minimum Vent Kit #2792
Stove Clearance A: 4: (102 mm)
Pipe Centerline B: 14³⁄₄” (375 mm)
Fig. 4 Corner installation, minimum corner clearance and flue
centerline.
ST129b
or CFM Minimum Vent Kit #7TFSDVSK
Fig. 6 Dimensions and clearances to ceiling or alcove.
Hearth Requirements
The Jefferson Heater must be installed on rigid flooring.
When the heater is installed directly on any combustible
surface other than wood flooring, a metal or wood panel
extending the full width and depth of the unit must be
used as the hearth. There are no other hearth requirements.
¹⁄₂” (1105 mm)*
30004177
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Jefferson Direct Vent/Natural Vent Gas Heater
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10 11 12 13 14 15 16 17 18 19 20
Vertical Run (in feet)
(Measured from the appliance flue collar to the top of the vent pipe.)
Horizontal Run (in feet)
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ST134a
FDV28
Horizontal
vent run
12/3/99 djt
areas modified
1/11/00 djt
Gas Specifications
Max. Min.
Input Input
Model Fuel Gas Control BTU/h BTU/h
JDVBRN Nat Millivolt 28,000 20,000
JDVBRP Prop Millivolt 28,000 19,000
Weight: Fully assembled; 350 lbs.
Gas Inlet and Manifold Pressures
Natural LP (Propane)
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” w.c.
The installation of your CFM Corporation stove must
conform with local codes, or in the absence of local codes, with the National Fuel Gas Code ANSI
Z223.1/NFPA 54 - latest edition, or CSA B149.1
Installation code. (EXCEPTION: Do not derate this
appliance for altitude up to 4,500 feet (1,370 m).
Maintain the manifold pressure at 3.5” w.c. for Natural
Gas and 10.0” w.c. for LP Gas.
Horizontal Termination -
Direct Vent ONLY
The vent must rise vertically a minimum of 24” (610mm)
off the top of the unit, before the first elbow. The horizontal run may extend up to 20’ (6 m) and include a
vertical rise of up to 40’ (12 m). (Fig. 7) Horizontal termination must also meet the criteria shown in Figures 9
through 11.
• Approved vent systems must terminate above and
including the heavy line in Figure 7.
• Two 45˚ elbows may be substituted for each single
90˚ elbow.
• With a rise between 2’ - 6’, one 90˚ or two 45˚ elbows
may be used.
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).
WARNING: Improper installation, adjustment, alteration, service or maintenance
can cause injury or property damage. Refer
to this manual for correct installation and
operational procedures. For assistance or
additional information consult a qualified
installer, service agency, or the gas supplier.
88
High Elevations
May use up to
three 90° Elbows
One 90°
Elbow
Unacceptable
Venting Configuration
Fig. 7 Horizontal vent termination window.
ST134a
30004177
Jefferson Direct Vent /Natural Vent Gas Heater
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0
20
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Vertical Run (in feet)
(Measure from the appliance flue collar to the top of the vent pipe.)
Horizontal Run (in feet)
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37
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ST132a
FDV28
Ve
rtical
vent run
12/3/99 djt
area
modified
1/11/00 djt
Vertical Termination - Direct Vent ONLY
A vertical vent system must terminate no less than 8’
(2.44 m) and no more than 40’ (12 m) above the appliance flue collar. A 2¹⁄₄" restrictor plate (supplied) must
be used, where specified, in all vertically terminated
vent systems. (Refer to Figure 8) NOTE: The restrictor
plate supplied with the vertical termination should
be discarded. Install restrictor plate supplied with
stove directly at stove outlet. A vertically terminated
vent system must also conform to the following criteria:
• No more than two 90° elbows may be used.
• Two 45° elbows may be substituted for one 90˚
elbow. No more than six elbows may be used.
• Vent must rise a minimum of 2 feet before offset is
used.
• Termination height must conform to roof clearance
as specified in Figure 9.
All Vertical Terminations in this area
Require use of
the 2¹⁄₄” Restrictor
Plate*
Fig. 8 Vertical vent termination window.
*The Restictor Plate is used on Direct Vent
installations only.
30004177
Vertical terminations
must be within this area
No Restrictor Plate
No offset may be used
Unacceptable
Venting Configuration
within this area
Vent Termination Clearances
When planning the installation, consider the location
of the vent terminal and clearances. Some of the most
common clearances to keep in mind are shown in Figure 9.
Important: All vent clearances must be maintained.
Check your vent termination clearances against
Figures 9 and 10.
The vent should be placed so that people cannot be
burned by accidentally touching the vent surfaces when
the stove is operating.
The vent termination should be located where it cannot
be damaged by such things as automobile doors, lawn
mowers or snowblowers and it should be located away
from areas where it could become blocked by snow,
etc.
Some considerations are:
• Obstructions or impediments to venting.
• Nearby combustible materials that could come into
contact with combustion exhaust gases.
• Other nearby openings {within 9” (229 mm)} through
which exhaust gas could reenter the building.
• All vegetation within 3’ (914 mm) that may interfere
with the draft.
Other factors that influence where the installation will
be sited include the location of outside walls, where
additional heat may be desired in the home, where the
family members gather most regularly, and perhaps
most importantly, the distance limitations of the venting
system.
IMPORTANT
Direct Vent Only
• The horizontal termination must not be recessed
into the exterior wall or siding.
• Horizontal vent runs must be level toward the
vent termination.
• Clearances around the vent termination must be
maintained.
• For installations using Simpson DuraVent pipe,
parallel installations with minimum wall clearance
have restricted access for connecting the Horizontal Vent Cap straps to the vent pipe. See the
maker’s instructions for recommended installation procedures.
ST132a
9
Jefferson Direct Vent/Natural Vent Gas Heater
Vent Termination Clearances
Your stove is approved to be vented either through the
side wall, or vertical through the roof.
• CFM Corporation does not require any opening
for inspection of vent pipe.
• Only CFM Corporation and Simpson DuraVent
venting components specifically approved and
labelled for this stove may be used.
• Minimum clearances between vent pipes and
combustible materials is one (1”) inch (25 mm),
except where stated otherwise.
• Venting terminals shall not be recessed into a wall or
siding.
• Horizontal venting must be installed on a level plane
without an inclining or declining slope.
There must not be any obstruction such as bushes,
garden sheds, fences, decks or utility buildings within
24” 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 termination 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.
Location of Vent Termination
It is imperative the vent termination be located observing the minimum clearances as shown in Figure 9.
1010
30004177
Jefferson Direct Vent /Natural Vent Gas Heater
V
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V
V
X
X
X
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A
J
K
F
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VENT TERMINATION AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT PERMITTED
H
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Operable
Operable
Fixed
Closed
V
B
INSIDE
CORNER DETAIL
V
A
G
N
N
CFM145a
General Venting Information - Termination Location
Canadian Installations1 US Installations
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’
(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 Stoves are certified as part of the appliance, with clearances tested and approved by the list ing agency.
3. CFM Corporation assumes no responsibility for the improper performance of the appliance when the venting system does not
meet these requirements.
Fig. 9 Vent termination clearances.
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2
11
Jefferson Direct Vent/Natural Vent Gas Heater
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
Venting Runs
Horizontal Run (in feet)
Vertical Run (in feet)
(Measured from floor of unit to
top of vent cap.)
A: Vertical installations up to 36' (12m) in
height. Up to an 18' horizontal vent run can be
installed within the vent system using a
maximum of two 90-degree elbows or four
45-degree elbows.
B: Vertical installations up to 36' (12m) in
height. Up to a 24' horizontal vent run can be
installed within the vent system using a
maximum of two 45-degree elbows.
(Ratio = 2/3, Hor./Vert.)
= Acceptable venting configuration
= Unacceptable venting configuration
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
16 18 20 22 24 26 28 30 32 34 36
4 6 8 10 12 14
A
B
*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.
Fig. 10 Termination clearances.
Venting Requirements - Natural Vent Only
No.
of Caps D
1 3’ (914 mm) 2 x D
2 6’ (1.8 m) 1 x D
3 9’ (2.7 m) 2/3 x D
4 12’ (3.7 m) 1/2 x D
D
= # of Termination caps x 3
Min.
C
= (2 / # termination caps) x D
Max.
C
Min.
Max.
Actual
Actual
Actual
Actual
Actual
584-15
Fig. 11 Vent termination window - Natural Vent ONLY.
1212
NOTE: When using the FSDHAG, the restrictor
plate supplied with the stove is not used.
FP567b
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