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