Vermont Castings RFSDV24 Assembly instructions

RFSDV_24_34_line
1_3550
rev. 0602 rjs
Installation Instructions and
Homeowner’s Manual
10003550 6/08 Rev. 6
DO NOT STORE
OR USE GASOLINE OR
OTHER FLAMMABLE VAPORS
AND LIQUIDS IN THE VICINITY
OF THIS OR ANY OTHER
APPLIANCE.
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.
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.
PLEASE READ THIS MANUAL
BEFORE INSTALLING AND
USING APPLIANCE
INSTALLER/CONSUMER
SAFETY INFORMATION
FOR YOUR SAFETY
Installation and service must
be performed by a qualified
installer, service agency or
the gas supplier.
Freestanding Direct Vent
Fireplace
Models: RFSDV24, RFSDV34
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.

2
RFSDV24/34 Freestanding Direct Vent Gas Fireplace
10003550
Installation & Operating Instructions
General Information, Warnings, Cautions ...........................................................................3
Requirements for the Commonwealth of Massachusetts ....................................................4
Fireplace Dimensions ..........................................................................................................5
Locating Your Fireplace .......................................................................................................6
Clearance to Combustibles .................................................................................................6
High Elevations ...................................................................................................................6
Gas Inlet and Manifold Pressures .......................................................................................6
Gas Specifications ...............................................................................................................6
Preparation ..........................................................................................................................6
Gas Line Installation ............................................................................................................6
Remote Switch Installation .................................................................................................. 7
General Venting Information
General Venting Information-Termination Location ............................................................8
General Information on Assembling Vent Pipes .................................................................. 9
How to Use the Vent Graph...................................... .........................................................10
Vertical Sidewall Applications & Installation ......................................................................10
Below Grade Installations.. ................................................................................................13
Vertical Through-the-Roof Applications & Installations ......................................................14
Venting Components ......................................................................................................... 16
Operating Instructions
Glass Information ..............................................................................................................17
Window Frame Assembly Removal ...................................................................................17
Glass Cleaning ..................................................................................................................17
Log Set and Lava Rock Material Installation ..................................................................... 17
Flame & Temperature Adjustment .....................................................................................19
Flame Characteristics ........................................................................................................19
Lighting & Operating Instructions ......................................................................................20
Instructions for RF Comfort Control Valve .........................................................................21
Troubleshooting .................................................................................................................25
Maintenance
Cleaning the Standing Pilot Control System ..................................................................... 26
Replacement Parts ......................................................................................................................27
Installation in Mobile Homes ......................................................................................................30
Optional Accessories
Fan Kits ............................................................................................................................. 31
Optional Gold Trim Kit .......................................................................................................32
Optional Brass Trim Kit ......................................................................................................32
Remote Control Units ........................................................................................................ 32
Warranty .......................................................................................................................................35
Energuide ......................................................................................................................................36
PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING THIS APPLIANCE.
Thank you and congratulations on your purchase of a Vermont Castings fireplace.
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
RFSDV24/34 Freestanding Direct Vent Gas Fireplace
10003550
This gas fireplace 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. If the unit is being installed in a mobile home, the
installation should comply with the current CAN/USA Z240.4
code. For USA Installations follow local codes and/or the
current National Fuel Gas Code. ANSI Z223.1/NFPA 54.
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 the
high surface temperatures of this fireplace and should stay
away to avoid burns or ignition of clothing.
3. CAUTION: Due to high glass surface temperature chil-
dren should be carefully supervised when in the same
room as fireplace.
Installation & Operating Instructions
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.
Model RFSDV34RMH can be installed in manufactured
(mobile) homes by OEM.
IMPORTANT:
PLEASE REVIEW THE FOLLOWING CAREFULLY
Remove any plastic from from 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 your 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 manufac-
turing process.
Please ensure that your room is well ventilated-open
all windows.
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.
Proposition 65 Warning: Fuels used in gas, woodburn-
ing 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 repro-
ductive harm.
California Health & Safety Code Sec. 25249.6
RFSDV24 / RFSDV34
Certified To
ANSI Z21.88-2005 / CSA 2.33-2005
Vented Gas Fireplace Heaters
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
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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 per-
formed by a qualified installer, service agency or gas sup-
plier. A professional service person should be contacted to
inspect the fireplace annually. More frequent cleaning may
be required due to excess lint and dust from carpeting, bed-
ding material, etc.
6. Control compartments, burners and air passages in this fire-
place should be kept clean and free of dust and lint. Make
sure that 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 combustible
materials, gasoline and other flammable vapour and liquids.
This fireplace should not be used as a dry-ing rack for cloth-
ing, nor should Christmas stockings or decorations be hung
on or around the fireplace.
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 ob-
structed in any way.
11. When the 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 control valve be left in the OFF position.

4
RFSDV24/34 Freestanding Direct Vent Gas Fireplace
10003550
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 horizontally 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.

5
RFSDV24/34 Freestanding Direct Vent Gas Fireplace
10003550
Fireplace Dimensions
Fig. 1 Fireplace specifications and framing dimensions.
A
D
I
H
B
K
J
G
F
E
C
3550
RFSDV34 dims
Ref. RFSDV24 RFSDV34
A 23” (584 mm) 26¹⁄₄” (667 mm)
B 28³⁄₄” (730 mm) 31¹⁄₂” (800 mm)
C 16⁵⁄₈” (422 mm) 19³⁄₈” (492 mm)
D 27³⁄₈” (695 mm) 30” (762 mm)
E 9¹⁄₂” (241 mm) 10” (254 mm)
F 13⁷⁄₈” (352 mm) 15¹⁄₂” (394 mm)
G 4” (102 mm) 4¹⁄₂” (114 mm)
H 23” (584 mm) 26¹⁄₄” (667 mm)
I 11¹⁄₂” (292 mm) 13¹⁄₈” (333 mm)
J 16⁵⁄₈” (422 mm) 19¹⁄₂” (495 mm)
K 6” (152 mm) 6³⁄₈” (162 mm)

6
RFSDV24/34 Freestanding Direct Vent Gas Fireplace
10003550
12” (305 mm)
A
12”
(305 mm)
B
E
C
D
FP1620
locate freestanding
Top of Unit to Ceiling ............................... 36” (914 mm)
Appliance
Back ........................................................ 0” (0 mm)
Side ................................................... 12” (305 mm)
Floor ........................................................ 0” (0 mm)
Corner ............................. 0” (0 mm) to Back Edges
Vent Pipe ............................................... 1” (25 mm)
Clearance to Combustibles
High Elevations
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 cur-
rent ANSI Z223.1/NFPA 54 and/or local codes hav-
ing jurisdiction.
In Canada, please consult provincial and/or local
authorities having jurisdiction for installations at
elevations above 4,500 feet (1,370 m).
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. 10.0” w.c.
Gas Inlet and Manifold Pressures
Preparation
The use of wallpaper adjacent to this fireplace is not
recommended, as the high heat given off by this fire-
place may adversely affect the binders in the adhesive
used to apply the wallpaper.
Before beginning, remove the window frame assembly
from the fireplace. Also check to make sure there is not
hidden damage to the fireplace. Take a minute and plan
out the gas, vent and electrical supply. Refer to Window
Frame Assembly Removal Section.
A) Flat on wall* B) Room Divider* C) Island
D) Cross Corner E) Flat on wall corner
Note (Fig. 2): *(A) and (B) must maintain a 12” (305 mm)
clearance between the wall and side glass of fireplace.
Locating Your Fireplace
Fig. 2 Locate gas fireplace.
FP1620
There is a minimum vertical rise required
for the venting, which varies depending on
the application. The maximum horizontal
run also has restrictions. Before starting
the installation, become familiar with vent-
ing instructions starting on Page 9.
Gas Specifications
Max. Min.
Input Input
Model Fuel Gas Control BTU/h BTU/h
RFSDV24RN Nat Millivolt Hi/Lo 20,000 14,000
RFSDV24RP Prop Millivolt Hi/Lo 20,000 15,000
RFSDV34RFN Nat Comfort Control 30,000 21,000
RFSDV34RFP Prop Comfort Control 30,000 22,500
Gas Line Installation
When purging gas line, the front window
frame assembly must be removed.
The gas pipeline can be brought in through the rear
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 connection.
It is most convenient to bring the gas line in from the
rear 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 ap-
proved flex connector. Since some municipalities have
additional local codes, it is always best to consult your
local authority and the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 in the USA or the CSA-B149.1 installa-
tion codes.
Always check for gas leaks with a mild
soap and water solution. Do not use an
open flame for leak testing.
The gas control is equipped with a captured
screw type pressure test point, therefore it is not neces-
sary to provide 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 that the gas line can be easily disconnected for
burner or fan servicing . See gas specifications for pres-
sure 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.

7
RFSDV24/34 Freestanding Direct Vent Gas Fireplace
10003550
CFM106
Typical Gas Line Connection
9-29-00
1/2” Gas Supply
1/2” x 3/8” Reducer
3/8” Nipple
3/8” x 3/8”
Shut-Off Valve
3/8” Nipple
3/8” Union
3/8” Nipple
CFM106
Fig. 3 Typical gas line connection.
Installation of Remote Switch
for RN/RP Gas Valve
NOTES: The remote ON/OFF switch cannot be fit-
ted to units using the Honeywell Radio Frequency
control valve.
If the fireplace has been fitted with the Radio
Frequency Control Valve, the ON/OFF function is
controlled by the remote handset. (Refer to the ad-
dendum or instructions packaged with the remote
handset.)
Install the ON/OFF switch assembly on either the rear
right or rear left side of the fireplace.
1. Remove the screw at the back of the cabinet top
either on the left or the right side of the fireplace.
2. Position switch assembly onto the back of the fire-
place, then fasten two (2) screws as shown in Figure
3.
3. Attach wiring under the clips on the rear casing (Fig.
4) and install wiring through the rear opening of the
fireplace before connecting to the valve as shown in
Figure 5.
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
ON/OFF Switch
Assembly
Clips
Screw
Screw
(through existing
hole)
Wiring for
Millivolt Gas
Valves
FP1621
Fig. 4 Attach wiring under clips on rear casing.
P
I
L
O
T
TPTH TP TH
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
Valve
Thermopile
FP1622
ON/OFF Switch or
Millivolt Thermostat
PILOT
ADJ
TH
TP
TP TH
rev 06-02
rjs
SIT Valve
RN/RP Valve
FP1494
Fig. 5 Install wiring to switch before connecting to valve.

8
RFSDV24/34 Freestanding Direct Vent Gas Fireplace
10003550
V
V
V
V
V
V
V
X
X
X
D
E
B
B
B
C
BM
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
NN
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. 6 Termination location requirements.

9
RFSDV24/34 Freestanding Direct Vent Gas Fireplace
10003550
General Information on Assembling Vent Pipes
Canadian Installations:
The 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 venting components manufactured by CFM Cor-
poration 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 collars on the
fireplace and termination, and the sliding joint of any
telescopic vent section used in the system.
Fig. 6a Termination clearances.
To join the twist lock pipes together, simply align the
beads of the male end with the grooves of the female
end, then while bringing the ends together, twist 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.
To make it easier to assemble 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
Fig. 7 Twist-lock pipe joints.
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. C
Max.
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.

10
RFSDV24/34 Freestanding Direct Vent Gas Fireplace
10003550
• 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. 10)
This does not apply if the 90° elbows are used to
increase or redirect a vertical rise. (Fig. 11)
Since it is very important that the vent-
ing system maintain its balance between
the combustion air intake and the flue
gas exhaust, certain limitations as to vent
configurations 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 fireplace to
the face of the outer wall.
Horizontal plane means no vertical rise exists on this
portion of the vent assembly.
• The maximum number of 90° elbows per side wall
installations is three (3).
• For RFSDV24 and RFSDV34 models, the maximum
horizontal rn for a minimum 12” (305 mm) vertical
rise is 3’ (914 mm). (Fig. 9)
Vertical Sidewall Applications
How to Use the Vent Graph
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 horizon-
tal vent pipe exiting through the outer wall. Using
this dimension on the Sidewall Vent Graph (Fig. 8),
locate the point intersecting with the slanted graph
line.
2. From the point of this intersection, draw a vertical
line to the bottom of the graph.
3. Select the indicated dimension, and position the
fireplace in accordance with same.
Example A:
If the vertical dimension from the floor of the fireplace is
11’ (3.4m) 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’
(2.14m), the horizontal run to the face of the outer wall
must not exceed 8¹⁄₂’ (2.6 m).
Horizontal dimension from the outside face of the wall to
the center of the fireplace vent flange
Sidewall vent graph showing the relationship between vertical
and horizontal dimensions for a Direct Vent flue system.
Vertical dimension from the floor of the fireplace to
the center of the horizontal vent pipe
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
Example: A
Example: B
CFM102
DV Graphic
9/28/00 sta
Fig. 8 Sidewall venting graph. (Dimensions in feet)
36”
(914 mm)
x
rev 06-02 rjs
RFSDV24
RFSDV34
x = 12” (305 mm)
FP1495
Fig. 9 Maximum horizontal run.