Vermont Castings DVR28IN Assembly instructions

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.
Direct Vent Model:
DVR28IN
Installation Instructions and Homeowner’s Manual
20012301 5/07 Rev. 1
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INSTALLER: Leave this manual with the appliance CONSUMER: Retain this manual for future reference.
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220012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS
BEFORE USING APPLIANCE.
Thank you and congratulations on your purchase of a CFM Corporation fireplace.
IMPORTANT: Read all instructions and warnings carefully before starting installation.
Failure to follow these instructions fully may result in a possible fire hazard and will void the warranty.
Table of Contents
Installation & Operating Instructions
Important Curing/Burning Instructions .................................................................................................3
Fireplace Dimensions ..........................................................................................................................4
Minimum Clearance Illustrations .........................................................................................................4
Firestop Framing .................................................................................................................................4
Locating Your Fireplace .......................................................................................................................5
Clearance to Combustibles .................................................................................................................5
Installation Instructions ........................................................................................................................5
Mounting the Fireplace ........................................................................................................................5
Gas Specifications, Gas Inlet and Manifold Pressures ........................................................................6
High Elevations ....................................................................................................................................6
Remote ON/OFF Hi/Lo Wall Mounted Transmitter ..............................................................................6
Gas Line Installation ............................................................................................................................6
DVR28 Wiring Diagram .......................................................................................................................7
Restrictor Plate Installation ..................................................................................................................7
General Venting Information
General Venting ...................................................................................................................................8
General Venting - Termination Location ..............................................................................................9
General Venting - Assembling Vent Pipes .........................................................................................10
How to Use the Vent Graph ...............................................................................................................11
Rear Wall Venting Applications and Installation .................................................................................11
Vertical Side Wall Venting Applications and Installation ....................................................................13
Below Grade Installation ....................................................................................................................14
Vertical Through-the-Roof Applications and Installation ....................................................................14
Venting Components .........................................................................................................................17
Operating Instructions
Glass Information ..............................................................................................................................18
Window Frame Assembly Removal ...................................................................................................18
Glass Cleaning ..................................................................................................................................18
Removal and Re-fitting of Curve Face ..............................................................................................18
Flame & Temperature Adjustment .....................................................................................................19
Flame Characteristics ........................................................................................................................19
Inspecting the Venting System ..........................................................................................................19
Lighting & Operating Instructions ......................................................................................................20
Troubleshooting .................................................................................................................................21
Maintenance
Cleaning the Standing Pilot Control System ......................................................................................24
Replacement Parts .........................................................................................................................................25
Accessories
Curve Face Kit ...................................................................................................................................26
Screen Door Kit .................................................................................................................................26
Warranty ..........................................................................................................................................................27
Energuide .......................................................................................................................................................28

20012301 3
Vermont Castings DVR28 Direct Vent Gas Fireplace
This gas appliance must be installed by a qualified
installer, preferably NFI or WETT (Canada) certified,
in accordance with local building codes and with
current CSA-B149.1 Installation codes for Gas Burning
Appliances and Equipment. For USA Installations follow
local codes and/or the current National Fuel Gas Code.
ANSI Z223.1/NFPA 54.
In the Commonwealth of Massachusetts, all gas
fitting and installation of this heater shall only be
done by a licensed gas fitter or licensed plumber.
FOR SAFE INSTALLATION AND OPERATION PLEASE
NOTE THE FOLLOWING:
1. This fireplace gives off high temperatures and should
be located out of high traffic areas and away from
furniture and draperies.
2. Children and adults should be alerted to the hazards
of high surface temperatures of this fireplace and
should stay away to avoid burns or ignition of clothing.
3. CAUTION: Due to high glass surface temperature
children should be carefully supervised when in
the same room as fireplace.
4. Under no circumstances should this fireplace be modi-
fied. Parts removed for servicing should be replaced
prior to operating this fireplace again.
5. A professional service person should be contacted to
inspect this fireplace annually. Make it a practice to
have all of your gas fireplaces checked annually. More
frequent cleaning may be required due to excess lint
and dust from carpeting, bedding material, etc.
6. Control compartments, burners and air passages in
this fireplace should be kept clean and free of dust
and lint. Make sure the gas valve and pilot light are
turned off before you attempt to clean this fireplace.
7. The venting system (chimney) of this fireplace should
be checked at least once a year and if needed your
venting system should be cleaned.
8. Keep the area around your fireplace clear of combusti-
ble materials, gasoline and other flammable vapor and
liquids. This fireplace should not be used as a drying
rack for clothing, nor should Christmas stockings or
decorations be hung on or around the fireplace.
9. Under no circumstances should any solid fuels (wood,
coal, paper or cardboard etc.) be used in this fire-
place.
10. The flow of combustion and ventilation air must not be
obstructed in any way.
11. When fireplace is installed directly on carpeting, vinyl
tile or any combustible material other than wood, the
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.
IMPORTANT:
PLEASE REVIEW THE FOLLOWING CAREFULLY
Remove any plastic from trim parts before turning the
fireplace ON.
It is normal for fireplaces fabricated of steel to give off
some expansion and/or contraction noises during the
start up or cool down cycle. Similar noises are found
with your furnace heat exchanger or car engine.
It is not unusual for 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 manufacturing
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.
Installation & Operating Instructions
This appliance may be installed in an aftermarket per-
manently located, manufactured home or mobile home,
where not prohibited by local codes.
This appliance is only for use with the type of gas indicat-
ed on the rating plate. This appliance is not convertible
for use with other gases, unless a certified kit is used.
WARNING: Check with your electronics manufacturer
before installing a television or other electronic de-
vice above this fireplace.
DVR28IN
Certified To
ANSI Z21.88-2005 / CSA 2.33-2005
Vented Gas Fireplace Heaters
13. This fireplace must not be connected to a chimney
flue serving a separate solid fuel burning fireplace.
14. When the fireplace is not in use it is recommended
that the gas valve be left in the OFF position.
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

420012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
DVR28 Fireplace Dimensions
Fig. 1 Fireplace specifications and framing dimensions.
Finished Wall
Finished Wall
1“ (25 mm) Min.
12”
(305 mm)
Min.
12301
DVR28 specs
3/07
28” (711 mm)
19”
(492 mm)
6”
(162 mm)
15"
(395 mm)
14”
(377 mm)
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Typ. 16” (406 mm) o.c.*
10”
(264 mm)
9”
(238 mm)
FP1783
Fig. 3 Firestop framing.
1“
(25 mm)
Min.
10”
(254 mm)
Min.
24”
(610 mm)
Min.
FP1782
DVR29 min. clearances
3/07
27”
(686 mm)
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6“
(152 mm)
Min.
Finished Wall
Curve Face Trim
Minimum Side Wall Clearance
Top View
FP1784
Minimum Ceiling and
Floor Clearance Side View
Fig. 2 Minimum clearances.
NOTE: Minimum
clearances are with
face trim in place.
FP1782
Ceiling
Floor
Top of Unit

20012301 5
Vermont Castings DVR28 Direct Vent Gas Fireplace
A) Flat on wall B) Cross corner C) **Island
D) *Room divider E) *Flat on wall corner F) Chase installation
Y) 6” minimum
NOTE: (Fig. 4)
** Island (C) and Room Divider (D) installation is possible as
long as the horizontal portion of the vent system (X) does not
exceed 20’ (610 cm). See details in Venting Section.
* When you install your fireplace in(D) Room divider or (E)
Flat on wall corner positions (Y), a minimum of 6” (153 mm)
clearance must be maintained from the perpendicular wall and
the front side edge of the fireplace.
Refer to (Y) in Figure 4.
Locating Your Fireplace
Y
EAB
C
D
F
YB
X
LU584-1
Locating unit
2/4/99 djt
LU584-R
Fig. 4 Locate gas fireplace.
Front of Unit to Combustibles ...................36” (914 mm)
Appliance
Top of Unit to Ceiling ..........................27” (686 mm)
Top of Face Trim to Ceiling ........ 24” (610 mm) Min.
Bottom of Unit to Floor .......................12” (305 mm)
Side of Unit to Sidewall ...................10¹⁄₂” (267 mm)
Back .......................................................1” (25 mm)
Venting
Concentric sections of DV Vent ....................1” (25 mm)
Nonconcentric sections of DV Vent
Sides and Bottom ...................................1” (25 mm)
Top .........................................................2” (51 mm)
Clearance to Combustibles
Installation Instructions
Preparation
Check fireplace to make sure it is levelled
and properly positioned.
1. Choose the location for the fireplace. Maintain
proper height and clearances.
2. Make sure framing is 16” (406 mm) o.c. for place-
ment of wall mount brackets pre-drilled holes. If
framing is not 16” o.c., the installer can drill new
holes in wall mounting brackets to align with existing
framing dimensions.
3. Make sure framing for firestop is correct. NOTE:
Firestop is for combustible walls. Refer to firestop
framing instructions on Pages 4 and 12, Figures 4
and 17.
4. Plumb for gas connection. Refer to Gas Line Instal-
lation on Page 6.
5. Finish wall as desired.
CAUTION: If wall is finished with combustible
materials, be sure to install firestop according
to instructions.
Mounting the Fireplace
CAUTION: DO NOT place fireplace on floor
or hard surface with bottom side down,
components could be damaged.
1. The DVR28 comes with a wall mount bracket to
secure the fireplace to the wall. Standoffs on the
back of the bracket allow for proper clearances to
combustibles. (Fig. 5)
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16” o.c.
(406 mm)
Firestop
Framing
(if required)
Finished
Wall
Wall Mounting
Bracket
FP1786
Fig. 5 Secure wall mounting bracket in desired location.
2. Align pipe clearance hole in wall mounting bracket
with through-the-wall clearance opening on noncom-
bustible wall or through firestop opening on combus-
tible walls.
3. Make sure wall mount bracket is level. Secure to
framing studs using mounting screws supplied. En-
sure framing is 16” (406 mm) o.c. to accommodate
mounting bracket.
4. Align the top and bottom mounting holes of the fire-
place with the top and bottom holes of the mounting
bracket. Secure fireplace to mounting bracket using
sheet metal screws supplied. (Fig. 6)
CAUTION: Be careful to avoid damaging the
electric components located on the bottom of
the fireplace when securing to the mounting
bracket.

620012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
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Sheet Metal
Screws (8)
Sheet Metal
Screws (4) FP1785
Wall Mounting Bracket
Secured to Walll
DVR28
Fig. 6 Secure fireplace to wall mounting bracket.
High Elevations
Input ratings are shown in BTU per hour and are
certified without deration for elevations up to
4,500 feet (1,370m) above sea level.
For elevations above 4,500 feet (1,370m) in USA,
installations must be in accordance with the 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 (1,370m).
Gas Line Installation
When purging the gas lines, the front win-
dow frame assembly must be removed.
The gas pipeline can be brought in under the bottom of
the fireplace. The gas line connections will be covered
by bottom trim. Refer to Figure 7 for gas line dimen-
sions. Use 1/2” rigid pipe. When gas line is in place un-
der the fireplace, install supplied 1/2” FPT to 3/8” flare
brass fitting. Connect preinstalled flex line on fireplace
to brass fitting with 3/8” flare fitting on supply line.
The gas line connection can be made with 3/8” rigid
pipe or an approved flex connector. Since some munici-
palities 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 installation code.
Remote ON/OFF Hi/Lo
Wall Mounted Transmitter
The DVR28 is equipped with a wireless transmitter. No
wires are required.
Always check for gas leaks with a mild
soap and water solution applied with a
brush no larger than 1” (25 mm). Never
apply soap and water solution with a spray
bottle. Do not use an open flame for leak
testing.
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 form the gas line when
pressure testing.
The gas control is equipped with a captured screw type
pressure test point, therefore it is not necessary to pro-
vide a 1/8” test point up stream of the control.
When using a flex connector use only approved fittings.
Always provide a union when using black iron pipe
so the gas line can be easily disconnected for burner
servicing. See gas specification for pressure details and
ratings.
The fireplace valve must not be subjected to any test
pressures exceeding 1/2 psi. Isolate or disconnect this
and any other gas appliance control from the gas line
when pressure testing.
Inlet Minimum 5.5” w.c.
Inlet Maximum 14.0” w.c.
Manifold Pressure 3.5” w.c.
Gas Inlet and Manifold Pressures
Natural
12”
(318 mm)
6”
(152 mm)
FP1787
gas line install
3/07
1”
(32 mm)
Gas Line
Through Wall
Gas Line
Opening in
Wall FP1787
Fig. 7 Recommended gas line installation.
Max. Min. Air
Input Input Shutter
Model Fuel Gas Control BTU/h BTU/h Setting
1/8”
DVR28IN Nat. Millivolt Hi/Lo 18,500 16,500 open
on sides
Gas Specifications

20012301 7
Vermont Castings DVR28 Direct Vent Gas Fireplace
Restrictor Plate Installation
The DVR28IN is shipped with a restrictor plate for ex-
tended pipe runs other than straight out installations. A
guide for usage is shown in Figure 10.
NOTE: Some installations may require some adjust-
ment by the installer for optimum flame appearance.
Optimum flame appearance would be a flame not
subject to tall dirty yellow flames or lifting of flames from
burner tube.
Installation
1. Remove front glass assembly. Refer to Window
Frame Removal section on Page 18.
2. Remove three (3) screws securing flue diverter to top
of combustion case. Remove flue diverter. (Fig. 9)
CAUTION: Use care not to damage rear refractory.
3. Remove two (2) screws on sides of flue opening.
4. Install restrictor plate with two (2) screws removed
from back of unit. (Fig. 9)
5. Re-install flue diverter with three (3) screws removed
earlier.
6. Reinstall glass assembly. (Refer to Page 18)
Figure 10
Examples for Extended Run/Restrictor Plate Settings
1. 90° Elbow, vertical 8’ (2.4 m), 90° elbow, out 20’ (6 m)
2. 90° Elbow, vertical 11’ (3.4 m), 90° elbow, out 13’ (4 m)
3. 90° Elbow, vertical 20’ (6 m), 90° elbow, out 7’ (2 m)
4. 90°, 40’ (12 m) vertical
Flue restricted to:
1. 1¹⁄₈” (29 mm) opening in flue pipe outlet
2. 7/8” (22 mm) opening in flue pipe outlet
3. 3/4” (79 mm) opening in flue pipe outlet
4. 1³⁄₈” (35 mm) opening in flue pipe outlet
Fig. 9 Install restrictor plate for optimum flame appearance.

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Flue Diverter
Remove
Three (3)
Screws
FP1789
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

Remove
Two (2)
Screws
Flue
Opening
FP1788

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
Restrictor
Plate
FP1790
Refer to Fig. 10
Pilot
Main AF-4000
HI/LO DC
Motor Drive
Red
Black
White
Green
Orange
AF-4000B/P Orange
Red Brown
Black
HI/LO DC Battery Pack
Module
Black Gnd
Brown
Brown
Black
Red
(SWI)
(SWI)
Optional DC
Battery Back-up
FP1750
DVR28 wiring diagram
2/07
Red
Black
Fig. 8 DVR28 wiring diagram.
FP1750
FP1796
Wireless remote
3/07
ON
OFF
HI
LO
Wireless Remote
No wiring required.
(Refer to Pages 6,19, 23)

820012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
Your fireplace is approved to be vented either through
the side wall, or vertically through the roof.
• Only CFM Corporation venting components specifi-
cally approved and labelled for this fireplace may be
used.
• If vent termination is installed in an accessible loca-
tion, Vent Termination Guard #53525 shall be in-
stalled.
• Vent terminations 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
inclining or declining slope.
General Venting
There must not be any obstruction such as bushes,
garden sheds, fences, decks or utility buildings within
24” (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 termi-
nation area after snow falls, and clear to prevent ac-
cidental 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 observ-
ing the minimum clearances as shown on the next
page.
*Check with local codes or in absence of same with
CSA B149.1 Installation Codes (1991) for Canada
or follow the current National Fuel Gas Code, ANSI
Z223.1/NFPA 54 for installations in the USA.

20012301 9
Vermont Castings DVR28 Direct Vent Gas Fireplace
V
V
V
V
V
V
V
X
X
X
D
E
B
B
B
C
B
M
B
A
J
K
F
L
VENT TERMINATION AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
H
I


Operable
Operable Fixed
Closed
V
B
CFM145a
DV Termin Location
5/01/01 Rev. 12/05/01
sta
INSIDE
CORNER DETAIL
V
A
G
N
N
CFM145a
General Venting Information - Termination Location
A = Clearance above grade, veranda, porch, 12” (30 cm) 12” (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 < 10,000 Btuh (3kW), 12” (30 cm) < 10,000 Btuh (3kW), 9”
for appliances > 10,000 Btuh (3kW) and (23 cm) for appliances > 10,000
< 100,000 Btuh (30kW), 36” (91 cm) Btuh (3kW) and < 50,000 Btuh
for appliances > 100,000 Btuh (30kW) (15kW), 12” (30 cm) for
appliances > 50,000 Btuh (15kW)
C = Clearance to permanently closed window 12” (305 mm) recommended to 12” (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 2’ (610mm) from the center
line of the terminal
E = Clearance to unventilated soffit 12” (305 mm) 12” (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 Btuh 6” (15 cm) for appliances
to building or the combustion air inlet to any (3kW), 12” (30 cm) for appliances < 10,000 Btuh (3kW), 9”
other appliances > 10,000 Btuh (3kW) and < 100,000 Btuh (23 cm) for appliances > 10,000
(30kW), 36” (91cm) for appliances Btuh (3kW) and < 50,000 Btuh
> 100,000 Btuh (30kW) (15kW), 12” (30 cm) for
appliances > 50,000 Btuh (15kW)
K = Clearance to a mechanical air supply inlet 6’ (1.83 m) 3’ (91 cm) above if within 10
feet (3 m) horizontally
L = Clearance above paved sidewalk or paved 7’ (2.13 m)† 7’ (2.13 m)†
driveway located on public property
M = Clearance under veranda, porch, deck or 12” (30 cm)‡ 12” (30 cm)‡
balcony
N = Clearance above a roof shall extend a minimum of 24” (610 mm) above the highest point when it passes through the roof
surface, and any other obstruction within a horizontal distance of 18” (450 mm).
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. 11 Vent termination locations.

10 20012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
Fig. 12 Termination clearances.
General Information Assembling Vent Pipes
Canadian Installations:
Venting system must be installed in accordance with the
current CSA-B149.1 installation code.
USA Installations:
The venting system must conform with local codes and/
or the current National Fuel Gas code ANSI Z223.1/
NFPA 54.
Only venting components manufactured by CFM Corpo-
ration can be used in Direct Vent systems.
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) 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.
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. 13 Twist-lock pipe joints.
Twist Lock Pipes
When using CFM Corporation twist-lock pipe it is not
necessary to use sealant on the joints. The only areas
of the venting system that need to be sealed with high
temperature silicone sealant are the sliding joints of any
telescopic vent section used in the system.
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 pipe together, twist the pipe

20012301 11
Vermont Castings DVR28 Direct Vent Gas Fireplace
The vent chart should be read in conjunction with the
following vent installation instructions to determine the
relationship of the vertical and horizontal dimensions of
the vent system.
1. Determine the height of the center of the horizontal
vent pipe exiting through the outer wall. Using this
dimension on the Sidewall Vent Graph (Fig. 14)
locate the point intersecting with slanted graph line.
2. From the point of this intersection, draw a vertical
line to the bottom of the graph.
3. Select the indicated dimension, and position the
fireplace in accordance with same.
Example A:
If the vertical dimension from the floor of the
fireplace is 11’ (3.4 m) the horizontal run to the face
of the outer wall must not exceed 14’ (4.3 m).
Example B:
If the vertical dimension from the floor of the unit is
7’ (2.14 m), the horizontal run to the face of the outer
wall must not exceed 8¹⁄₂’ (2.6 m).
How to Use the Vent Graph Rear Wall Venting Applications
When installed as a rear vent unit this appliance may
be vented directly to a termination located on the rear
wall behind the appliance.
• Only CFM Corporation venting components are
approved to be used in these applications. (Refer to
“Venting Components” listed for different installation
requirements)
• The maximum horizontal distance between the rear
of the appliance (or end of the transition elbow in a
corner application) and the outside face of the rear
wall is 20” (508 mm). (Fig. 15 & 16)
• Only one 45° elbow is allowed in these installations.
• If using a 45° elbow at fireplace, you must start
out using an 8” (203 mm) or 12” (305 mm) sec-
tion of pipe first attached to heater then a 45°
elbow.
• Minimum clearances between vent pipe and com-
bustible materials are as follows:
Top - 2” (51 mm)
Sides - 1” (25 mm)
Bottom - 1” (25 mm)
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 unit
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
  
eg: A
eg: B
Fig. 14 Sidewall venting graph. (Dimensions in feet)
FP1780
rear vent no elbows
3/07
Rear Vent Top View
FP1780
Fig. 15 Rear vent application, no elbows.
20”
(508 mm)
Max.
FP1779
Fig. 16 Rear vent application, one 45° elbow.
FP1779
Rear Vent-Top View
3/07
20”
(508 mm)
Max.
45° 45°
20”
(508 mm)
Max.
Start with 8” (203 mm) or 12”
(305 mm) Pipe Section

12 20012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
STEP 1
Locate vent opening on the wall. To locate hole center
consult with appropriate fireplace dimensions, Page 4.
Frame as shown below.
Combustible Walls (Fig. 17): Cut a 10³⁄₈”H x 9³⁄₈” W
(264 x 240 mm) hole through the exterior wall and
frame as shown.
Noncombustible Walls (Fig. 17): Hole opening must
be 7¹⁄₂” (190 mm) in diameter.
Zero clearance sleeve is only required for
combustible walls.
STEP 2
Measure wall thickness and cut zero clearance sleeve
parts to proper length (MAXIMUM 12”/305 mm). Assem-
ble sleeve and attach to firestop with #8 sheet metal
screws (supplied). (Fig. 18)
STEP 3
Measure the horizontal length requirement for the vent-
ing including a 2” (51 mm) overlap, i.e. from the elbow
to the outside wall face plus 2” (51 mm). (Fig. 15 or 16)
FP1752
Zero Clearance Sleeve
2/07
Max. Length
12” (305mm)
#8 Screws (2)
#8 Screws
(2)
Adjustable
Zero Clearance
Sleeve
#8 Screws
(2)
Adjustable Zero Clearance Sleeve ZCS101
Fig. 18 Adjustable zero clearance sleeve.
Firestop
STEP 4
Install the 4” (102 mm) vent to the appliance collar and
secure with three (3) sheet metal screws. Install the 7”
(178 mm) vent pipe to the appliance collar and secure
with three (3) sheet metal screws. It is not necessary
to seal this connection. If a 45° elbow is being used,
attach the elbow to the appliance in the same manner
then attach the venting to the elbow.
It is critical there is no downward slope
away from the appliance when connecting
the vent or elbow.
STEP 5
Guide the venting through the vent hole a you place the
appliance in its installed position. Guide the 4” (102 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 reali gn the venting at the appliance flue collars.
(Fig. 19) Attach the termination to the wall as outlined in
the instruction sheet supplied with the termination.
FP1751
vent opening
2/07
Vent Opening for Combustible Wall
9³⁄₈”
(240mm)
10³⁄₈”
(264mm)
Fireplace Hearth
Framing
Detail
Opening for
Noncombustible Wall
7¹⁄₂”
(190 mm)
FP1751
Fig. 17 Locate vent opening on wall.
Firestop Top Tabs
Bottom Tabs
Install provided firestop with zero
clearance sleeve into framing
opening after drywall or finish
material is installed. Use the tabs
for clearance locators top and
bottom.
FP1005
Side View Vent Termination
1/25/00 djt
Finished Wall
Vent
Termination
FP1753
Fig. 19 Side view of final unit location.
Firestop
Zero Clearance
Sleeve
Rear Wall Installation
Twist Lock Pipe

20012301 13
Vermont Castings DVR28 Direct Vent Gas Fireplace
Vertical Sidewall Applications
Since it is very important for the venting system
to maintain 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 shows the relationship between vertical
and horizontal side wall venting and will help to deter-
mine the various dimensions allowable.
Minimum clearance between vent pipes and com-
bustible materials is 2”(51 mm) on top and 1” (25
mm) on the bottom and sides unless otherwise
noted.
When vent termination exits through foundations less
than 20” 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.
The horizontal vent run refers to the total 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.
When installing the appliance as a rear
vent unit, the 90° or 45° transition elbow
is NOT INCLUDED in the following criteria
and calculations, and unless specifically
mentioned should be ignored when calcu-
lating venting layouts.
• The maximum number of 90° elbows per side wall
installation is three (3). (Fig. 20)
FP1755
Horizontal Run
2/07
A 10’
(254 cm)
B 7’
(178 cm)
8’
(244 cm)
A + B = 17’
(518 cm) Max.
FP1755
Fig. 21 Maximum vent run with elbows.
Fig. 20 Maximum three (3) 90° elbows per installation.



3 x 90°
Elbows
FP1754
Example: According to the vent graph (Page 11) the
maximum horizontal vent length in a system with a 7.5’
(2.3 m) vertical rise is 20’ (6 m) and if a 90° elbow is
required in the horizontal vent it must be reduced to 17’
(5.2 m). In Figure 21 Dimension A plus B must not be
greater than 17’ (5.2 m).
In Figure 21, dimension A plus B must not be greater
than 17’ (5.2 m).
• The maximum number of 45° elbows permitted per
side wall installation is two (2). These elbows can be
installed in either the vertical or horizontal run.
• For each 45° elbow installed in the horizontal run,
the length of the horizontal run MUST be reduced by
18” (45 cm). This does not apply if the 45° elbows
are installed on the vertical part of the vent system.
• The maximum number of elbow degrees in a system
is 270°. (Fig. 22)
Example:
Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total angular variation = 270°
• 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). This does
not apply if the 90° elbows are used to increase or
redirect a vertical rise. (Fig. 21)
1
2
3
4



1 + 2 + 3 + 4 = 270°
FP1756
Fig. 22 Maximum elbow usage.

14 20012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
Below Grade Installations
When it is not possible to meet the required vent ter-
minal clearances of 12” (305 mm) above grade level
a snorkel kit is recommended. This allows installation
depth of down to 7” (178 mm) below grade level. The
7” is measured from the center of the horizontal vent
pipe as it penetrates through the wall.
Ensure the sidewall venting clearances are observed.
If venting system is installed below ground, we recom-
mend a window well with adequate and proper drainage
to be installed around the termination.
If installing a snorkel, a minimum 24” (610 mm) vertical
rise is necessary. The maximum horizontal run with the
24” vertical pipe is 36” (914 mm). This measurement
is taken from the collar of the fireplace (or transition
elbow) to the face of the exterior wall. See the Sidewall
Venting Graph for extended horizontal run if the vertical
exceeds 24” (610 mm).
1. Establish vent hole through the wall. (Fig. 17)
2. Remove soil to a depth of approximately 16”
(406 mm) below base of snorkel. Install window
well (not supplied). Refill hole with 12” (305 mm) of
coarse gravel leaving a clearance of approximately
4” (102 mm) below snorkel. (Fig. 23)
3. Install vent system. Refer to Page 12.
4. Ensure a watertight seal is made around the vent
pipe coming through the wall.
5. Apply high temperature sealant caulking (supplied)
around the 4” and 7” snorkel collars.
6. Slide the snorkel into the vent pipe and secure to the
wall.
7. Level the soil to maintain a 4” (102 mm) clearance
below snorkel. (Fig. 23)



Zero Clearance Sleeve
(if required)
Screws 7TDVSNORK
(Snorkel)
4” Clear-
ance Min.
Window
Well
Gravel
Drain
Foundation Wall
*A minimum of 24” (610 mm)
vertical pipe must be installed
when using the 7TDVSNORK.
Firestop
7” Pipe
24” (610 mm )
Minimum *
BG404
Fig. 23 Below grade installation.
Do not backfill around snorkel.
A clearance of at lest 4” must be main-
tained between the snorkel and the soil.
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel. Fas-
ten brackets to wall first, then secure to snorkel with self
drilling #8 x 1/2 sheet metal screws. It will be necessary
to extend vent pipes out as far as the protruding wall
face. (Fig. 24)
BG401
Snorkel
2/10/99 djt
Snorkel
Wall Screws
Sheet Metal
Screws
Foundation
Recess
Watertight Seal
Around Pipe
BG401
Fig. 24 Snorkel installation, recessed foundation.
Vertical Through-the-Roof Application
This gas fireplace has been approved for:
• Vertical installations up to 40’ (12 m) in height. Up
to a 10’ (3 m) horizontal vent run can be installed
within the vent system using a maximum of two 90°
elbows. (Fig. 25)



Max. Height 40’
(12.2 m)
Min. Height 8’
(2.4 m)
Max. 10’ (3 m)
Support Straps
Every 3’ (914 mm)
FP1757
Fig. 25 Support straps for horizontal runs.
• Up to two 45° elbows may be used within the hori-
zontal run. For each 45° elbow used on the horizon-
tal plane, the maximum horizontal length must be
reduced by 18” (450 mm).
Example: Maximum horizontal length:
No elbows = 10’ (3 m)
1 x 45° elbow = 8.5’ (2.6 m)
2 x 45° elbows = 7’ (2.1 m)

20012301 15
Vermont Castings DVR28 Direct Vent Gas Fireplace
1
2
3
4
1
2
3
4
1 + 2 + 3 + 4 = 270°
FP1179
Fig. 26 Maximum elbow usage.
• A minimum of an 8’ (2.5m) vertical rise is required.
• Two sets of 45° elbow offsets may be used within the
vertical sections. From 0 to a maximum of 8’ (2.5 m)
of vent pipe can be used between elbows. (Fig. 26)
• 7DVCS supports offsets. (Fig. 28) This application
will require that you first determine the roof pitch
and use the appropriate starter kit. (Refer to Venting
Components List)
• The maximum angular variation allowed in the sys-
tem is 270°. (Fig. 26)
• The minimum height of the vent above the highest
point of penetration through the roof is 2’ (610 mm).
(Fig. 29)
Vertical Through-the-Roof Installation
1. Locate your fireplace.
2. Plumb to center of the (4”) flue collar from ceiling
above and mark position.
3. Cut opening equal to 9³⁄₈” x 9³⁄₈” (240 x 240 mm).
4. Proceed to plumb for additional openings through
the roof. In all cases, the opening must provide a
minimum of 1 inch clearance to the vent pipe, i.e.,
the hole must be at least 9³⁄₈” x 9³⁄₈” (240 x 240 mm).
5. Place fireplace into position.
6. Place firestop(s) #7DVFS or Attic Insulation Shield
#7DVAIS into position and secure. (Fig. 27)
7. Install roof support (Fig. 44) and roof flashing making
sure upper flange is below the shingles. (Fig. 28)
8. Install appropriate pipe sections until the venting is
above the flashing. (Fig. 30)
9. Install storm collar and seal around the pipe.
10. Add additional vent lengths for proper height. (Fig.
29)
11. Apply high temperature sealant to 4” and 7” collars
of vertical vent termination and install.
If there is a room above ceiling level, fire stop spacer
must be installed on both the bottom ad the top side
of the ceiling joists. If an attic is above ceiling level a
7DVAIS (Attic Insulation Shield) must be installed.
The enlarged ends of the vent section always face
downward.
FP1029
attic insulation shield
firestop spacers
1/28/00 djt
Joist
Attic Insulation Shield
Ceiling Installation
Upper Floor
11”
(279mm)
Firestop
Spacer
Nails (4)
Fig. 27 Place firestop spacer(s) and secure.
FP1029
11”
(279mm)
FP1184
Typical roof/ceiling
support apps.
Typical Roof
Support
Application
Typical Ceiling
Support
Application
Fig. 28 Venting supports.
FP1184

16 20012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
TWL101a
Twist Lock Pipe
2/8/99 djt
3 #5 Sheet Metal
Screws per Joint
Sealant
TWL101a
Fig. 30 Roof flashing.
Storm Collar
Min.
2' (610 mm)
FP1185
Fig. 29 Minimum termination to roof clearance.

20012301 17
Vermont Castings DVR28 Direct Vent Gas Fireplace
7TDVRVT - Through the wall Rear Vent Termination
Starter Kit -
Model 7TDVSK - Sidewall Venting (Twist Lock Pipe)
Model 7FDVSK - Sidewall Venting (Flex Vent Pipe)
Models 7TDVTK/TV - Hot Touch Termination Kits
Model 7TDVTVTK/TV - Cool Touch Termination Kit
Starter Kit - Model 7TDVSKV - Vertical Venting
for 7TDVSKV-A order 1/12 to 6/12 roof pitch
for 7TDVSKV-B order 7/12 to 12/12 roof pitch
for 7TDVSKV-F order flat roof
Starter Kit for Below Grade Installation
Model 7TDVSKS -Snorkel Kit (Twist Lock Pipe)
Model 7FDVSKS -Snorkel Kit (Flex Vent Pipe)
Starter Pipe
Model 7TDVP 20/8 - 24” Starter Pipe Bulk
Model 7FDVP 30/8 - 30” Flex Pipe Bulk
45o Elbow
7TDV45 for Rear Vent to Vertical Vent
or Vertical/Horizontal Offsets
90o Transition Elbow
7TDVRT90 for Rear Vent to Vertical Vent
90° Elbow
7TDV90 Vertical/Horizontal Offset
Telescopic vent sections
7TDVP1117 -11” to 17” adjustable length
7TDVP3567 -35” to 67” adjustable length
Pipe sections for vertical or horizontal venting
Model 7TDVP8” - 4 per box
Model 7TDVP12” - 4 per box
Model 7TDVP24” - 4 per box
Model 7TDVP36”
Model 7TDVP48”
Firestop Spacer
20012362
Attic Insulation Shield
Model 7DVAIS
Vertical/Horizontal Combination Offset Support
Model 7DVCS
Venting Components
584B
Vent components
Starter Kit
2/25/99 djt
584G
Venting Components
Firestop spacer
2/25/99 djt
584H
Venting components
attic insulation shield
2/25/99 djt
584D
Vent Components
90 degree elbow
2/25/99 djt
10/20/99 twist lock
584C
Vent components
45 degree elbow
2/25/99 djt
10/20/99 twistlock
584A
venting components
rear vent term
4/6/99 djt
584E
Venting Components
Telescope vent
2/25/99 djt
10/20/99 twist lock
584F
Venting Components
Pipe sections
2/25/99 djt
10/20/99 twist lock
584I
vent components
offset support
2/25/99 djt

18 20012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
Glass Information
Only glass approved by CFM Corporation
should be used on this fireplace.
• The use of any non-approved replacement glass will
void all product warranties.
• Care must be taken to avoid breakage of the glass.
• Do not operate appliance with glass front
removed, cracked or broken.
• Replacement glass (complete with gasket and
window frame) is available through your CFM
Corporation dealer and should only be installed
by a licensed qualified service person.
Operating Instructions
Window Frame Assembly Removal
1. Turn the fireplace OFF (including the pilot).
2. If the unit has been operating, allow time for the
components to cool.
3. Remove two (2) bolts on bottom side of unit holding
front trim face on. (Fig. 32)
4. Remove front trim face by tilting bottom out and lift-
ing face off unit. (Fig. 32)
5. Remove two (2) bolts securing bottom door frame to
unit. (Fig. 31)
6. Tilt window frame assembly out slightly at the bot-
tom, lift the frame up and away from the fireplace.
(Fig. 31)
7. To replace window frame assembly reverse proce-
dure.



Window Frame
Assembly
Fireplace
Front
Glass
Panel
Fig. 31 Window frame assembly removal.
FP1758
Glass Cleaning
It is necessary to clean the glass periodically. During
start-up condensation, which is normal, forms on the
inside of the glass and causes lint, dust and other
airborne particles to cling to the glass surface. Also
initial paint curing may deposit a slight film on the glass.
It is therefore recommended the glass be cleaned
two or three times with a non-ammonia household
cleaner and warm water (gas fireplace glass cleaner
is recommended). After the initial cleaning process the
glass should be cleaned two or three times during each
operating season depending on the environment in the
house.
Clean the glass after the first two weeks of
operation.
Do not clean glass when hot.
Do not use abrasive cleaners.
Do not strike or slam the glass.
Removal and Re-fitting the Curve Face
The Curve face is fitted to the fireplace by hooking the
top edge of the face over the mounting brackets as
shown in Figure 32. Secure with two (2) screws on the
bottom face of the trim. (Fig. 32)



Curve Face
Bottom Bracket
Control Cover Plate
KT779
Fig. 32 Hang Curve Face in place.
Top Mounting
Brackets

20012301 19
Vermont Castings DVR28 Direct Vent Gas Fireplace
Flame & Temperature Adjustment
To adjust Hi/Lo setting, push either the high or low con-
trol button on remote control transmitter.
Flame Characteristics
It is important to periodically perform a visual check of
the pilot and the burner flames. Compare them to Fig-
ures 34-35. If any of the flames appear abnormal call a
service person.
Inspecting the Venting System
This appliance venting system is designed and con-
structed to develop a positive flow adequate to remove
flue gases to the outside atmosphere.
Any foreign objects in the venting system, except those
designed specifically for the venting system, may cause
spillage of flue gases.
To inspect the venting system, make sure the main gas
valve is off. Remove window frame assembly (Refer to
Window Frame Assembly Removal Section). Using a
flashlight, check the area above the baffle in the com-
bustion dome. Clean if necessary.
FP1796
Wireless remote
3/07
ON
OFF
HI
LO
FP1759
Fig. 33 Flame adjustment for American Flame valve.



FP1778
Fig. 34 Correct pilot flame appearance.


LG480
Fig. 35 Correct DVR28 flame. Center flame should be ap-
proximately 5¹⁄₂” (140 mm) high.

20 20012301
Vermont Castings DVR28 Direct Vent Gas Fireplace
Lighting & Operating Instructions
For Fireplaces equipped with AF4000 Gas Valve
A. This fireplace is equipped with an ignition device
which automatically lights the pilot. DO NOT try to
light the pilot by hand.
B. BEFORE OPERATING, smell all around the
appliance area for gas. Be sure to smell next to
the floor because some gas is heavier than the
air and will settle on the floor.
What to do if you smell gas
• Do not try to light any appliance.
• Do not operate any electrical switch.
• Do not use any phone in your building.
For Your Safety, Read the Following Warnings
before Lighting the Appliance
• Immediately call your gas supplier from
a neighbor’s phone. Follow the gas
suppliers instructions.
• If you cannot contact your gas supplier call
the Fire Department
C. Do not use this appliance if any part has been
under water. Immediately call a qualified service
technician to inspect the appliance and replace
any part of the control system and any gas control
that has been under water.
1. Turn the remote switch to the OFF position.
2. Turn OFF all electrical power to the fireplace if
service is required.
3. Open the lower access panel.
4. Turn the shut-off valve on the flexible gas line to
the OFF position. FP297A
Warning: If you do not follow these instructions exactly, a fire or explosion may
result, causing property damage, personal injury and loss of life.
Lighting Instructions
Turning Off the Gas to the Appliance
FP297A
INSTA VENT FREE
UVHB26 GAS SUPPLY
7/1/98
1. STOP! Read the safety information above before
continuing.
2. This appliance is equipped with an ignition device
which automatically lights the pilot. DO NOT try to
light the pilot by hand.
3. Access the gas control by removing the side cover
access door on the left side of the unit.
4. Turn the remote switch, if used, OFF. Turn the
wireless remote, if used, OFF.
5. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor.
If you smell gas, STOP. Follow instruction B
in the safety warnings above. If you do not
smell gas, go on to the next step.
6. Close the access door.
7. If the appliance will not operate, follow the
instructions TURNING OFF THE GAS TO
THE APPLIANCE, and call your service
technician or gas supplier.
1/2” Gas Supply
1/2” NPT x 3/8” Flare
Shut-Off Valve
3/8” Flex Line
(From Valve)
Valve in the “ON” position



“S” Connection
Connect to Module
Spark to Pilot
Pilot Assembly
Pilot Gas Connection
Side or Back “I” Connection
Connect to
Module
Main Valve Internal Solenoid
Connection
Green & White Wires
Outlet
Pressure Tap
Pilot Internal
Solenoid
Connection
Orange &
white Wires
Inlet Pressure
Tap
Pilot Adjustment
Screw