Lennox L20 DVF-2 User Manual

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POUR VOTRE SÉCURITÉ

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INSTALLATION AND OPERATION

FREESTANDING VENTED GAS FIRED ROOM HEATERS

L20 DVF-2 shown with optional gold door and brickaded interior

MANUAL

Models: L20 BF-2 (B-Vent) and L20 DVF-2 (Direct-Vent)

Report #189122-1027389

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.

FOR YOUR SAFETY: Do not store or use gasoline
or other flammable vapors or liquids in the vicin­ity of this or any other appliance.

FOR YOUR SAFETY: What to do if you smell gas:

• DO NOT light any appliance.

• DO NOT touch any electrical switches.

• Do not use any phone in your building.

• Immediately call your gas supplier from
a neighbor’s phone. Follow your gas
suppliers instructions.

• If your gas supplier cannot be reached, call
the fire department.

Installation and service must be performed by a quali­fied installer, service agency or the gas supplier.

Model L20 DVF-2 may be installed in an aftermarket permanently located,

RETAIN THIS MANUAL FOR FUTURE REFERENCE

P/N 775

manufactured

mobile) home, where not proh

AVERTISSEMENT: ASSUREZ-VOUS DE BIEN SUIVRE LES

021M Rev. C, 8/04

ited by local code

INSTRUCTIONS DONNÉ DANS CETTE NOTICE POUR
RÉDUIRE AU MINIMUM LE RISQUE D’INCENDIE OU
POUR ÉVITER TOUT DOMMAGE MATÉRIEL, TOUTE
BLESSURE OU LA MORT.

: Ne pas entreposer ni ut
d’essence ni d’autre vapeurs ou liquides inflammables dans
le voisinage de cet appareil ou de tout autre appareil.

POUR VOTRE SÉCURITÉ: Que faire si vous sentez une
odeur de gaz:

• Ne pas tenter d’allumer d’appareil.

• Ne touchez à aucun interrupteur. Ne pas vous
servir des téléphones se trouvant dans le batiment
où vous vous trouvez.

• Evacuez la piéce, le bâtiment ou la zone.

• Appelez immédiatement votre fournisseur de gaz
depuis un voisin. Suivez les instructions du
fournisseur.

• Si vous ne pouvez rejoindre le fournisseur de gaz, appe­lez le service dos incendies.

L’installation et service doit être exécuté par un qualifié
installeur, agence de service ou le fournisseur de gaz.

ser

IMPORTANT WARNINGS / CAUTIONS
CAUTION: READ THIS MANUAL THOROUGHLY BEFORE STARTING INSTALLATION. FOR YOUR SAFETY,
FOLLOW THE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS EXACTLY WITHOUT DE­VIATION. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A POSSIBLE FIRE HAZARD AND
MAY VOID THE WARRANTY. IF THIS APPLIANCE IS NOT PROPERLY INSTALLED, A HOUSE FIRE MAY RE­SULT. CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION IN­SPECTION IN YOUR AREA.

1. WARNING: IMPROPER ASSEMBLY, INSTALLATION, AD­JUSTMENT, ALTERATION, SERVICE OR MAINTENANCE
CAN CAUSE INJURY AND / OR PROPERTY DAMAGE. IN­STALLATION AND SERVICE MUST BE PERFORMED BY A
QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS
SUPPLIER. EXCEPT WHEN COMPLYING WITH LOCAL
CODES, ANY DEVIATION FROM THE INSTALLATION AND /
OR OPERATING INSTRUCTIONS CONTAINED IN THIS
MANUAL WILL VOID THE APPLIANCE WARRANTY AND
MAY BE HAZARDOUS.

2. DUE TO HIGH TEMPERATURES, THIS APPLIANCE SHOULD
BE LOCATED OUT OF TRAFFIC AND AWAY FROM FURNI­TURE, DRAPERIES AND NOT IN WINDY OR DRAFTY AREAS.

3. THE APPLIANCE MUST NOT BE CONNECTED TO A CHIM­NEY FLUE SERVING A SEPARATE SOLID-FUEL BURNING
APPLIANCE.

4. MODEL L20 DVF-2 IS EQUIPPED WITH A RELIEF DOOR IN
CASE OF DELAYED IGNITION BLOWBACK. IF THE RELIEF
DOOR OPENS, REMOVE BACK PANEL AND INSPECT FOR
GASKET DAMAGE. IF NECESSARY, REPLACE WITH FAC­TORY SUPPLIED GASKET ONLY. CONFIRM RELIEF DOOR
IS CLOSED AND PROPERLY SEATED, THEN REPLACE
BACK PANEL.

5. CAUTION: HOT WHILE IN OPERATION. AN APPLIANCE HOT
ENOUGH TO WARM YOUR HOME CAN SEVERELY BURN
ANYONE TOUCHING IT. KEEP CHILDREN, CLOTHING AND
FURNITURE AWAY. CONTACT MAY CAUSE SKIN BURNS. DO
NOT LET CHILDREN TOUCH THE APPLIANCE. TRAIN THEM
TO STAY A SAFE DISTANCE FROM THE UNIT.

6. DO NOT PLACE CLOTHING OR OTHER FLAMMABLE MATE­RIAL ON OR NEAR THE GAS APPLIANCE. THE MINIMUM
CLEARANCES MUST BE MAINTAINED FOR ALL COMBUSTI­BLE SURFACES AND MATERIALS INCLUDING; FURNITURE,
CARPET, DRAPES, CLOTHING, WOOD, PAPERS, ETC.

7. NEVER SEAL THE OPENING AT THE REAR OF THE STOVE.

8. DO NOT CONNECT 110-12 VAC (RESIDENTIAL LINE VOLT­AGE) TO THE GAS CONTROL VALVE OR CONTROL WIRING
SYSTEM OF THE UNIT.

9. ANY SAFETY SCREEN OR GUARD REMOVED FOR SERVIC­ING MUST BE REPLACED PRIOR TO OPERATING THE AP­PLIANCE.

10. WARNING: USE ONLY THE GLASS DOOR CERTIFIED WITH
THIS APPLIANCE. EXERCISE CAUTION TO PROTECT
GLASS FROM IMPACT. DO NOT OPERATE THE APPLI­ANCE WITH BROKEN GLASS OR USE SUBSTITUTE MATE­RIALS.

11. 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 GAS
CONTROL WHICH HAS BEEN UNDER WATER.

12. DO NOT BURN WOOD OR OTHER MATERIAL IN THIS
HEATER.

13. WARNING: THE APPLIANCE AREA MUST BE KEPT CLEAR
AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE
AND OTHER FLAMMABLE VAPORS AND LIQUIDS.

14. DO NOT USE A BLOWER INSERT, HEAT EXCHANGER IN­SERT OR OTHER ACCESSORY NOT APPROVED FOR USE
WITH THIS APPLIANCE.

15. THIS APPLIANCE IS NOT FOR USE WITH AIR FILTERS.

16. ANY CHANGE TO THIS HEATER OR ITS CONTROLS CAN
BE DANGEROUS.

17. THIS APPLIANCE SHOULD BE INSPECTED AND MAIN­TAINED AT LEAST ANNUALLY BY A PROFESSIONAL SER­VICE PERSON. MORE FREQUENT CLEANING MAY BE RE­QUIRED DUE TO EXCESSIVE LINT FROM CARPETING,
BEDDING MATERIAL, ETC. IT IS IMPERATIVE THAT CON­TROL COMPARTMENTS, BURNERS AND CIRCULATING
AIR PASSAGEWAYS OF THE APPLIANCE BE KEPT CLEAN.

18. THIS APPLIANCE IS ONLY FOR USE WITH THE TYPE OF
GAS INDICATED ON THE RATING LABEL (LOCATED IN­SIDE CONTROL PANEL). THIS APPLIANCE IS NOT CON­VERTIBLE FOR USE WITH OTHER FUEL UNLESS A CERTI­FIED KIT IS USED.

19. CAUTION: UNDER NO CIRCUMSTANCES SHOULD THESE
APPLIANCES BE VENTED TO OTHER ROOMS OR BUILD­INGS. THESE APPLIANCES MUST ONLY BE VENTED TO
THE OUTSIDE. VENT TERMINATIONS SHALL NOT BE RE­CESSED INTO A WALL OR SIDING.

20. WARNING: THESE APPLIANCES MUST BE PROPERLY
CONNECTED TO A VENTING SYSTEM. OPERATION OF
THESE GAS APPLIANCES WHEN NOT CONNECTED TO A
PROPERLY INSTALLED AND MAINTAINED VENTING SYS­TEM CAN RESULT IN CARBON MONOXIDE (CO) POISON­ING AND POSSIBLE DEATH.

21. WARNING: DO NOT MODIFY THE VENTING SYSTEM, AP­PLIANCE, OR CONTROLS IN ANY WAY. BE ADVISED, ANY
MODIFICATION CAN BE DANGEROUS.

22. IMPORTANT: DO NOT EXCEED THE MAXIMUM HORIZON­TAL RUNS ALLOWED.

23. SAVE THESE INSTRUCTIONS.

PAGE 2

TABLE OF CONTENTS

Important Warnings ........................................................ 2

Testing / Listing, Using this Manual ................................. 3

Planning Your Installation ..............................................4-6

Manufactured (Mobil) Home Requirements....................... 6

Installation ...................................................................7-15

Care and Operation.....................................................16-17

Propane Conversion ...................................................18-19

Maintenance...............................................................20-21

Wiring Diagrams ............................................................. 22

Troubleshooting .........................................................23-24

Replacement Parts / Optional Accessories....................... 25

Specifications.............................................................27-28

Safety / Listing Labels ................................................29-30

Ownership Record and Service Log................................. 31

TESTING / LISTING

This appliance is tested and certified as safe for residential use
by an internationally recognized testing and certification
agency. The safety tests are conducted in accordance with
American National Standards Institute (ANSI) requirements.
These appliances are tested, certified, and listed by the CSA,
AGA, CGA to ANSI Z21.88a - 2003 Vented Gas Fireplace Heat­ers and CSA 2.33a - M98 - 2003 Vented Gas Fireplace Heaters.

APPROVED VENTING:

L20 DVF-2
Vent chimney or Simpson Dura Vent brand chimney
only. Other brands may not be used. See pages 8 and 9.

L20 BF-2
components installed in accordance with manufacturers
instructions. See page 11.

Listed for installation with Security Secure

May be vented with any listed class B chimney

CONGRATULATIONS ON THE PURCHASE OF YOUR NEW GAS
APPLIANCE MANUFACTURED BY LENNOX HEARTH PROD­UCTS.

When you purchased your new gas fired heater, you joined
the ranks of thousands of concerned individuals whose an­swer to their home heating needs reflects their concern for
aesthetics, efficiency and our environment. We extend our
continued support to help you achieve the maximum benefit
and enjoyment available from your new gas fired heater.

It is our goal at Lennox Hearth Products to provide you, our
valued customer, with an appliance that will ensure you
years of trouble free warmth and pleasure.

Thank you for selecting a Lennox Hearth Products gas fired
heater as the answer to your home heating needs.

Sincerely,
All of us at Lennox Hearth Products

PACKAGING LIST

This appliance is packaged with an accessory package, which
contains the following:

One - Installation and operation instructions manual.
One - Warranty.
One - Log set and embers.
One - LP conversion kit.
One - 9 ft. electrical power cord.

USING THIS MANUAL

Please read and carefully follow all of the instructions found in
this manual. Please pay special attention to the safety instruc­tions provided in this manual. Following the Homeowner’s
Care and Operation Instructions included here will assure that
you have many years of dependable and enjoyable service
from your appliance.

PAGE 3

PLANNING YOUR INSTALLATION

LOCAL AND NATIONAL CODE REQUIREMENTS

The installation of these appliances must conform with local
codes or, in the absence of local codes, with the National Fuel
Gas Code, (for USA) NFPA 54 / ANSI Z223.1 - latest edition.

Air Circulation Blower: The blower electrical power cord must
be electrically grounded per local codes or per electrical codes:

In USA

In Canada

ELECTRICAL GROUNDING INSTRUCTIONS. THIS
APPLIANCE IS EQUIPPED WITH A THREE-PRONG
(GROUNDING) PLUG FOR YOUR PROTECTION
AGAINST SHOCK HAZARD AND SHOULD BE
PLUGGED DIRECTLY INTO A PROPERLY GROUNDED
THREE-PRONG RECEPTACLE. DO NOT CUT OR RE­MOVE THE GROUNDING PRONG FROM THIS PLUG.

WARNING: TO AVOID ELECTRICAL SHOCK, ALWAYS
ENSURE THAT THE POWER CORD IS UNPLUGGED
(I.E., THERE IS NO ELECTRICAL POWER TO THE
CIRCULATION BLOWER) BEFORE HANDLING THE
CIRCULATION BLOWER OR PERFORMING ANY
WORK ON THE APPLIANCE.

High Altitude: Gas inputs shown are for elevations up to 4500

feet. For elevations above 4500 feet, contact your gas supplier
or qualified service technician regarding the necessary dera­tion of appliance (deration: replacing burner orifice with a
smaller one to reduce input). Ratings must be reduced at the
rate of 4 percent for each 1,000 feet above sea level. Refer to
(for USA) NFPA 54 / ANSI Z223.1 - latest edition for orifice
resizing.

TOOL / EQUIPMENT LIST

The following tools and equipment are recommended for com­pleting the partial assembly required when the appliance is
installed:

• 7/16”, 3/4” open end wrenchs.

• 1/4”, 3/8” nut drivers.

• Pipe wrench.

• Phillips head screw driver.

• Flat head screw driver.

• Pipe sealant compound.

• Leak test fluid “U” tube manometer or pressure gauge

(0 - 16” (inches water column) H2O scale.

, NEC, ANSI / NFPA 70 - latest edition.

, CSA C22.1

WARNINGS

GAS PRESSURE (WC = Water Column)
Minimum inlet gas supply pressure for the purpose of input
adjustment:

Natural Gas - 4.5” WC min. – 7.0” WC max.
Propane (LP) - 11” WC min - 13.0” WC max.

Manifold gas supply pressure:
LOW HIGH

Natural Gas - 1.8” + / -.3” WC (to) 3.5” + / -.3” WC
17,000 BTU / hr 26,000 BTU / hr

Propane (LP) 6.6” + / -.3” WC (to) 10” + / -.3” WC
17,000 BTU / hr 24,000 BTU / hr

Note: ” WC = Inches Water Column

PRESSURE TAPS

Gas Inlet Pressure Tap

- Located on bottom left of gas valve.

Gas Outlet (manifold) pressure tap

- Located on bottom right

of gas valve.

Gas Control Valve

Pilot Adjustment Screw

Gas Control Knob

Piezo Igniter

Convertible HI/LO
Regulator

Inlet
Pressure
Tap

Outlet Pressure Tap

Regulator
Cap

Wiring
Terminals

Pressure Testing: See Pressure Testing on page 12.

PAGE 4

PLANNING YOUR INSTALLATION

QUESTIONS TO ASK THE LOCAL BUILDING OFFICIAL

Correct installation is critical and imperative for reducing fire
hazards and perilous conditions that can arise when gas appli­ances function improperly. The appliance must be installed per
manufacturers’ instructions.

Gas appliance equipment and installations must conform to
appropriate local codes and applicable state and federal re­quirements. Familiarity with these requirements before instal­lation is essential. Important considerations to discuss with
local building officials include:

1. Applicable codes (i.e. Uniform Mechanical Code, State or
Regional Gas Codes, National Fuel Gas Code)?

2. Local amendments?

3. Recognized testing lab: CSA / AGA.

4. Is a permit required - cost?

5. In some states or municipalities, a licensed gas fitter or
plumber may be required to install this appliance. Check
with your local building official for requirements in your
area (i.e. Is a license required for installation of gas supply
line)?

6. Maximum amount of gas pipe without a pressure test ­type of test required?

7. Are below grade penetrations of the gas line allowed?

8. Is concealed gas piping allowed?

9. Specific requirements of concealed fittings?

10. Is rigid pipe to appliance required?

11. Allowed piping materials?

12. Shut-off valve required within 4 feet of the firebox?

13. May the shut-off valve be concealed?

14. Rooms where the installation is not allowed?

In the absence of local codes, installation should conform to
the National Fuel Gas Code, also known at ANSI Z223.1­NFPA 54.

PAGE 5

PLANNING YOUR INSTALLATION

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MODELS L20 BF-2 AND L20 DVF-2
CLEARANCES TO COMBUSTIBLE MATERIALS

These appliances can be installed in most residential room configura­tions, parallel to a rear or adjacent wall, or in an alcove that allows for
the minimum clearances to combustible surfaces. Your local building
inspector should review your plans prior to installation.

When installing this appliance, provide adequate clearances around
air openings and adequate clearances for purposes of servicing and
proper operation.

As determined through the safety certification of this unit, a mini­mum clearance to combustible materials must be maintained around
specific areas of the gas appliance.
(Refer to Figures 1 through 3)

The clearances listed here are minimum distances and only apply in
the configuration shown. Do not use clearances from one installa­tion configuration with clearances from another to obtain closer
clearances.

Top of appliance (min.) 36” (inches)

This includes any projections such as shelves, window sills, mantels, etc.
above the appliance.

Back Wall 2" (inches)
Side Wall 12" (inches)
Corner (45° angle) 2" (inches)
stove corners to wall
Ceiling Minimum 65" (inches) from floor
Alcove Min. Height 65" (inches) from floor
Alcove Min. Width 47" (inches)
Alcove Max. Depth 24" (inches) from unit face.

The stove can not be placed deeper into an alcove than 24” from the stove
face to alcove opening.

Floor 0 inches

MANUFACTURED (MOBILE) HOME REQUIREMENTS

Model L20 DVF-2 may be installed in an aftermarket permanently
located, manufactured home, where not prohibited by local codes.
When installed in Manufactured Housing the following supplemental
requirements must be met:
 The appliance must be secured to the floor. Use the (3) ¼”-20x2

¾” bolts (which secured appliance pedestal base to the wooden
pallet) for securing appliance to the manufactured home floor.

 The appliance must be grounded to the chassis of the manufac-

tured home. Use a No. 8 or heavier copper wire at least 18" in
length.

Model L20 BF-2 is NOT approved for Manufactured Home instal­lations.

IMPORTANT NOTES:

The structural integrity of the manufactured home floor, walls, ceiling
and roof must be maintained.

A manufactured (mobile) home installation must conform with the
Manufactured Home Construction and Safety Standard, Title 24 CFR,
Part 3280, or, when such a standard is not applicable, the Standard
for Manufactured Home Installations, ANSI / NCSBCS A225.1, or
standard for Gas equipped Recreational Vehicles and Mobile Hous­ing, CSA Z240.4.

Rear Wall or Alcove

65 Inch

(1651 mm)

Min. Ceiling

Height

2” Min.
(51 mm)

Fig. 1

Corner

2” Min.

51 mm

2” Min.

Fig. 2

51 mm

Rear Wall or Alcove

2” Min. (51 mm

12” Min.

305 mm

Fig. 3

Ref. 23” (584 mm)

24” Max. (610 mm

12” Min.

305 mm

FLOOR PROTECTION

When installed directly on carpeting, •tile or other combusti­ble material other than wood flooring, the appliance shall be
installed on a metal or wood panel extending the full width
and depth of the appliance (see notes below).

•

Notes:

1) Ceramic tile is non-combustible and does not require a
wood or metal panel under the appliance. 2) Models with
a pedestal base where base dimensions exceed width and
depth of stove body, qualify as the floor protection

PAGE 6

INSTALLATION - MODEL L20 DVF-2 (DIRECT-VENT) VENTING REQUIREMENTS.

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This appliance is designed to be vented with a 4” x 6 5/8” direct-vent pipe. Each direct-vent appliance must use its own separate
vent system.

VERTICAL TERMINATION WITH
NO OFFSETS

Min. Vertical Pipe Length: 5 feet

Max. Vertical Pipe Length: 25 feet

5 Feet

Min.

25 Feet

Max.

VERTICAL TERMINATION
WITH 2 OFFSETS

Min. Vertical Pipe From Appliance to first offset:
2 feet.

Min. Total Vertical Pipe Length: 5 feet

Max. Total Vertical Pipe Length: 25 feet

For every 1 feet of
vertical pipe (from
unit to first offset), 2
feet of horizontal
run is allowed (not
to exceed 12 ft.

Example – with a 6’ ver­tical pipe off unit, 12’ of
horiz

ntal run is allowed.

At 2’ Min. Vertical, 2’ Max.
Horizontal is allowed.

5 Feet

Min.

25 Feet

Max.

HORIZONTAL TERMINATION
WITH 1 OFFSET

Min. Vertical Pipe From Appliance to offset: 2
feet.

Max. Vertical Pipe Length: 25 feet

12 Feet Max.

For every 1 feet of v
pipe (from unit to first offset),
2 feet of horizontal run is
allowed (not to exceed 12 ft.

25

Feet

Max.

Example
tical pipe off unit, 12’ of
horizontal run is allowed.

At 2’ Min. Vertical, 2’ Max.
Horizontal is allowed.

with a 6’ ver-

rtical

* 2 Feet Min.

Horizontal
runs require
¼” rise per
foot.

* 2 Feet Min.

Wall
Penetration
Detail

Maximum total offsets allowed: Not to exceed 180 degrees.
Maximum allowable horizontal pipe run is 12 feet.

With 2 feet of vertical pipe installed from the appliance (* see note), a 2 foot maximum horizontal run allowed. For installations with
more than 2 feet of vertical pipe, calculate allowable horizontal run as indicated in applicable illustration above.

See page 10 for Vent Termination Requirements.
Also see pipe manufacturers instructions for additional vent installation requirements.
Horizontal vent clearances
Vertical vent clearances

: 3“ minimum top 1“ minimum on bottom and sidewalls.

: 1” minimum.

Install vent support brackets every 4 feet of vertical pipe unless otherwise specified by vent manufacturer.

* Note: If using Propane Gas (LP), it may be necessary to install (as a minimum) 3 feet of vertical pipe from the appliance prior to an

offset to ensure optimum product performance. This may be necessary due to variations in vent configuration and other numerous fac­tors which affect exhaust flow and air delivery such as BTU value, ambient temperature, wind conditions, altitude, etc.

PAGE 7

INSTALLATION

DIRECT VENT SYSTEM COMPONENTS – MODEL L20 DVF-2 ONLY

The following Direct-Vent system components may be safely used model L20 DVF-2.

Model # Brand: SECURITY / Description Model # Brand: SIMPSON DURA-VENT / Description

SV 0 SHK Standard Horizontal Term. Kit (90° Black Elbow, Firestop (2), Horizon-

tal Square Term. Cap)

SV 0 HK Horizontal Term. Kit (90° Black Elbow, Firestop (2), Horizontal Term.

Cap, adj. Black length 1-1/2 – 6”)

SV 0 FK Vertical Flat Roof Term. Kit (w/flashing, storm collar, vertical Term.

Cap)

SV 0 FAK Vertical pitched Roof Kit, 1/12-7/12 (with adjustable roof flashing,

storm collar, vertical termination cap)

SV 0 FBK Vertical pitched Roof Kit, 8/12-12/12 (with adjustable roof flashing,

storm collar, vertical termination cap)
SV 0 L6 6” Pipe Length (Galvalume) 6” Pipe Length (Galvalume)
SV0 LB6 6” Pipe Length (Black) 908B 6” Pipe Length (Black)
SV 0 9” Pipe Length ( Black) 907B 9” Pipe Length ( Black)
SV 0 L12 12” Pipe Length (Galvalume) 906 12” Pipe Length (Galvanized)
SL 0 LB12 12” Pipe Length (Black) 906B 12” Pipe Length (Black)
SV 0 L24 24” Pipe Length (Galvalume) 904 24” Pipe Length (Galvanized)
SV 0 LB24 24” Pipe Length (Black) 904B 24” Pipe Length (Black)
SV 0 L36 36” Pipe Length (Galvalume) 903 36” Pipe Length (Galvanized)
SV 0 LB36 36” Pipe Length (Black) 903B 36” Pipe Length (Black)
SV 0 L48 48” Pipe Length (Galvalume) 902 48” Pipe Length (Galvanized)
SV 0 LB48 48” Pipe Length (Black) 902B 48” Pipe Length (Black)
N/A N/A 911B 11”-14” Adj. Pipe Length (Black)
SV 0 LA 1 ½- 6” Adj. Pipe Length N/A N/A
SV 0 LBA 1 ½- 6” Adj. Black Pipe Length N/A N/A
SV 0 E45 45 Elbow (Galvalume) 945 45 Elbow (Galvanized)
SV 0 EB45 45 Elbow (Black) 945B 45 Elbow (Black)
SV 0 E90 90 Elbow (Galvalume Swivel) 990G 90 Elbow (Galvanized Swivel)
SV 0 EB90 90 Elbow (Black Swivel) 990BG 90 Elbow (Black Swivel)
SV 0 90 Elbow (Galvalume) 990 90 Elbow (Galvanized)
SV 0 90 Elbow (Black) 990B 90 Elbow (Black)
SV 0 CHC ⊕Horizontal Standard Term. Cap 984 ⊕Horizontal Standard Term. Cap
SV 0 CHCV ⊕Horizontal High Wind Term. Cap N/a ⊕Horizontal High Wind Term. Cap
SV 0 CPB • Vertical Termination Cap 983 • Vertical Termination Cap
SV 0 CGV • Vertical High Wind Cap 991 • Vertical High Wind Cap
SV 0 STC36 ⊗Snorkel Termination Cap 36” 981 ⊗Snorkel Termination Cap 36”
SV 0 STC14 ⊗Snorkel Termination Cap 14” 982 ⊗Snorkel Termination Cap 14”
SV 0 Vinyl Shield Protector 950 Vinyl Siding Standoff
SV 0 VS Round Ceiling Support

/ Wall Thimble Cover
SV 0 CSB Cathedral Ceiling Support Box, decorative square 941 Cathedral Ceiling Support Box
SV 0 SF Black Plate, Decorative N/A N/A
SV 0 Round Ceiling Support Box/Wall

Thimble
SV 0 Storm Collar 953 Storm Collar
SV 0 RSM Wall Radiation Shield N/A N/A
SV 0 BF Firestop N/A N/A
N/A N/A 963 Firestop Spacer
SV 0 F Flashing, Flat Roof (storm collar included)
SV 0 FA Flashing , Adjustabl e r oof 1/12-7 / 1 2 (storm col l ar include d ) 943 Flashing 0 /12-6/12
SV 0 FB Flashing, Adjustable 8/12-12/12 (s torm c olla r incl uded) 943S Flashing 7/12-12/12
SV 0 BM Wall Band 988 Wall Strap

⊗ Snorkel Caps: These are elongate vent termination caps, which incorporate the principles of natural draft into a horizontal installation. Two styles

are common, 14” and 36” (Cap height). They enhance draft and relieve backpressure by creating natural draft in the snorkel.

⊕ Horizontal Caps: This 13 ½” square horizontal cap is placed on the outer wall of the dwelling. Not to be within 9” of an air inlet or within 12” of the

ground. It requires a minimum 2’ rise on the interior pipe.

• Vertical Termination Cap: Low profile and high wind caps can only be used on vertical pipe installations.

970 Basic Horizontal Term. Kit (90° Black Elbow, Wall Thimble Cover,

Horizontal Square Term. Cap)

971 Horizontal Term. Kit A (90° Black Elbow, Wall Thimble Cover, Hori-

zontal Square Term. Cap, adj. 24” black pipe, 11-14 5/8” adj. Black
pipe)

973 Vertical Termination Kit

978 Vertical Pitched Roof Kit, 0/12–6/12 (with adjustable flashing, storm

collar, low profile term. Cap)

N/A N/A

940 Round Ceiling Support

/ Wall Thimble Cover

942 Round Ceiling Support Box/Wall

Thimble

PAGE 8

INSTALLATION - MODEL L20 DVF-2 ONLY

Vent

Direct Vent Retrofit Of Existing Chimney System - An existing Class-A (wood-burning) Metal Chimney or Masonry Chimney can be
converted to a direct vent system. Use one of the following chimney conversion kits listed below. Have the existing chimney system
inspected by a professional prior to the conversion. If using Simpson Dura-Vent brand liner kit, see “IMPORTANT” note at the top of
page 8. The chimney conversion should not be applied to the portion of the vent system that is in the room of the appliance. Use only
Co-Axial direct vent pipe (4” inner pipe, 6 5/8” outer pipe as listed on page 8) from the appliance to the retro-connector into converted
flue system. Adhere to all specifications shown on pages 6 and 7 regarding clearances to combustibles, vertical and horizontal vent
length minimums and maximums, etc. Read all instructions in this manual and provided by vent manufacturer with kit carefully before
starting the installation. Failure to follow the instructions may create a fire or other safety hazard, and will void the warranty.

Model # Brand: SECURITY / Description Model # Brand: SIMPSON DURA-VENT / Description

SV4MCK Masonry Chimney Conversion Kit –Vertical term. Cap,

cap adapter, masonry cover, black adapter (to flex), 2
gear clamps

SV4CCK1 Factory Built Chimney Conversion Kit – for 6” I.D., 1”

insulation.

SV4CCK2 Factory Built Chimney Conversion Kit – for 7” I.D., 1”

insulation; 8” I.D., 1” insulation; 6” I.D., 2” insulation.

SV4CCK3 Factory Built Chimney Conversion Kit – for 10” I.D., 1”

insulation; 7” I.D., 2” insulation; 8” I.D., 2” insulation.

MODELS L20 BF-2 AND L20 DVF-2
VERTICAL VENT TERMINATION REQUIREMENTS

These instructions should be used as a guideline and do not supersede local codes in any way. Install vent according to local codes,
these instructions, the current National Fuel Gas Code (ANSI-Z223.1) in the USA or the current standards of CAN/CGA-B149.1 and ­B149.2 in Canada.

Terminate multiple vent terminations according to the installation codes listed above.

Terminate single vent caps relative to building components according to the following chart & illustration. The vent/air intake termina­tion clearances above the high side of an angled roof is as shown in the following chart:

Termination Heights For Vents

Above Flat or Sloped Roofs

Roof Pitch Feet Meters
Flat to 6/12 1 0.3
6/12 to 7/12 1.25 0.38
7/12 to 8/12 1.5 0.46
8/12 to 9/12 2 0.61
9/12 to 10/12 2.5 0.76
10/12 to 11/12 3.25 0.99
11/12 to 12/12 4 1.22
12/12 to 14/12 5 1.52
14/12 to 16/12 6 1.83
16/12 to 18/12 7 2.13
18/12 to 20/12 7.5 2.29
20/12 to 21/12 8 2.44

• Venting terminals shall not be recessed into a wall or siding.

• Ref. NFPA 54 / ANSI Z223.1, 7.6, fig. 13: Gas Vent Termination

locations for listed Caps, 12 inches or less in size, at least 8 feet
from a vertical wall.

934 Masonry Chimney Conversion Kit

931 Factory Built Chimney Conversion Kit A – for 6”

I.D.; Only compatible w/specific brands – Contact
Vent Manufacturer

932 Factory Built Chimney Conversion Kit B – for 6”, 7”

& 8” I.D.; Only compatible w/specific brands –
Contact Vent Manufacturer

933 Factory Built Chimney Conversion Kit C – for 7” &

8” I.D.; Only compatible w/specific brands – Con­tact Vent Manufacturer

2 Ft. Min.

Termination

Storm
Collar

Flashing

Concentric
Vent Pipe

Horizontal Overhang

2 Ft. Min.

Lowest
Discharge
Opening

* H

1 inch (25.4 mm) Minimum
Clearance to Combustibles

* H = Minimum height from roof to
lowest discharge opening of vent.

X

12

Roof Pitch is X/12

PAGE 9

INSTALLATION - MODEL L20 DVF-2 ONLY

HORIZONTAL VENT TERMINATION REQUIREMENTS

The venting terminals should not be recessed into a wall or siding.

A = 2” Clearances above grade, veranda, porch, deck or bal-

cony.
B = 12” Clearance to window or door that may be opened.
C = 9” (USA) Clearance to permanently closed window.
12” (CAN)
D = 24” Vertical clearance to ventilated soffit located above the

terminal within a horizontal distance of 2 feet (60 cm)

from the center-line of the terminal.
E = 12” Clearance to unventilated soffit.
F = 9” Clearance to outside corner.
G = 6” Clearance to inside corner.
H = 3 ft. (USA) Not to be installed above a meter/regulator

assembly within 3 feet (90 cm) horizontally from the

centerline of the regulator.
I = 3 ft. (USA) Clearance to service regulator vent outlet.
6 ft.(CAN)

J = 9” (USA) Clearance to non-mechanical air supply inlet to

building or the combustion air inlet to 12“ (CAN) any
other appliance.

K = 3 ft. (USA) Clearance to a mechanical air supply inlet. 6 ft.

(CAN)

L* = 7 ft. (USA) Clearance above paved side-walk or a paved

driveway located on public property.

M**= 12” Clearance under veranda, porch, deck or balcony

* A vent shall not terminate directly above a side-walk 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 of 2 sides beneath the floor.

• Note: Local Codes or Regulations may require different clear-

ances.

PAGE 10

INSTALLATION

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MODEL L20 BF-2 ONLY
This appliance is designed to be vented with a 4” B-Vent pipe. Each B-Vent appliance must use its own separate vent system. For
pipe clearances, also see pipe manufacturers venting instructions.

B-Vent Installation Illustration

Approved for vertical termination only.

Vertical

Termination

Firestops must be
used when vent
pipe passes
through a floor or
ceilin

5 Feet

Min.

Onl

Horizontal runs
require ¼” rise
per foot.

ee chart

below to
determine
horizontal

run allowed

Model L20 BF-2

Maximum Horizontal Pipe Runs

for Given Vertical Pipe Run (in feet)

Vertical run
in feet

5’ 6’ 8’ 10’ 15’ 20’

Maximum horizon­tal run in feet

Note: Maximum allowable horizontal pipe run is 20 feet.

4’ 6’ 8’ 10’ 15’ 20’

25

Feet

Max.

Vent Configuration Requirements

A minimum of 5 feet vertical pipe is required to vent the ap­pliance. Lengthy horizontal pipe runs require sufficient length
of vertical pipe to deliver adequate draft. Use the table above
as a guide in planning your installation. The use of multiple
45° or 90° elbows should be compensated by providing addi­tional vertical pipe run.

The B-Vent unit has a 4” B-Vent flue collar and may be in­stalled with listed B-Vent piping and components. Refer to
the pipe manufacturer’s installation instructions for specific
requirements for their product. Maintain proper clearances to
combustible materials as specified by the pipe manufacturer.
Whenever vent pipe is run horizontally, maintain a minimum
1/4” rise per foot. Exterior B-Vent exhaust systems should be
enclosed in a chase to avoid rapid cooling of exhaust gases in
the vent. Such cooling could produce condensation of flue
gases or exhaust gas spillage. The use of a chase is highly
recommended in colder climates.

Notes:

 Maximum total offsets allowed: Not to exceed 180 de-

grees.

 Also see pipe manufacturers instructions for additional

vent installation requirements.

Horizontal vent clearances

mum on bottom and sidewalls.

Vertical vent clearances

: 3“ minimum top, 1“ mini-

: 1” minimum.

 Install vent support brackets every 4 feet of vertical pipe

unless otherwise specified by vent manufacturer.

 For vent termination requirements, see page 10

PAGE 11

INSTALLATION

GAS SUPPLY HOOKUP (ALL MODELS)

If using pipe other than black iron pipe see NFPA 54-National Fire Pro­tection Association / ANSI Z223.1-American National Standards Institute;
and local code for specific requirements for the type of pipe used. Alter­native gas piping systems such as CSST may be used subject to local
code and proper sizing.

This appliance is equipped with a flexible gas line and fitting for
a gas supply line connection. Connection can be made using
either the 3/8” NPT male fitting or, by removing the fitting, to
the flex line 3/8” female flare. The flex line can be routed to the
gas supply through either the pedestal bottom or through the
rear pedestal cover depending upon the orientation of the sup­ply line. Some areas may have certain restrictions against the
use of flexible gas lines. Check local codes. The gas appliance
control valve has a 3/8” NPT female type inlet for the gas supply
line, if hard plumbing is required.

If the gas supply will be routed to the appliance from the rear,
the flexible gas line for hookup is readily accessible. If the gas
supply will be routed to the appliance through the flooring, re­move the rear panel. Redirect the flexible gas line through the
large hole in the center of the pedestal base for gas supply con­nection.

A gas supply line must be run to the appliance by a qualified
professional. The plumbing of the gas line must comply with
National Standards; NFPA 54-National Fire Protection Associa­tion / ANSI Z223.1-American National Standards Institute; and
local code.

Gas piping must not run in or through air ducts, clothes chutes,
chimneys or gas vents, dumb waiters or elevator shafts.

Piping should be sloped 1/4” per 15 feet (6mm per 4.6m) up­ward toward the meter from the appliance. The piping must be
supported at proper intervals every 8 to 10 ft. (2.4m to 3.1m)
using suitable hangers or straps.

The gas supply line must be purged of air before it is connected
to the appliance.

An accessible, approved shut-off valve must be installed up­stream of any connector so that the appliance may be isolated
to allow service, removal, and replacement (within six feet of the
appliance per NFPA 54, or twelve inches in some codes). A
shut-off valve is provided with this appliance.

IMPORTANT: In case emergency shut-off is required, shut off
main manual gas valve and disconnect main power to appliance.
These devices should be properly labeled by the installer.

PRESSURE TESTING:

• The appliance main gas valve must be disconnected from the gas sup­ply piping system during any pressure testing of that system at test
pressures in excess of *1/2 psi (3.5 kPa).

• The appliance must be isolated from the gas supply piping system by
closing its individual manual shut-off valve during any pressure test­ing of the gas supply piping system at test pressures equal to or less
than *1/2 psi (3.5 kPa).

Make the connection to the gas supply line using the correct
fitting required to the shut-off valve.

Install a drip leg where condensates might accumulate. Sedi­ment traps, like drips and collection tees, are required to be
installed. Traps collect moisture and intercept and hold foreign
objects which might block orifices and valves. A drip leg should
be installed in vertical pipe runs to the appliance.

Supply Line Size Requirements

The proper gas line diameter must be used to run from the sup­ply regulator (at the gas company meter) to the appliance.
Never use galvanized or plastic pipe. Refer to the table below
for suggested sizing of the gas supply line.

Suggested Sizing of

Schedule 40 Pipe Supply Line

Schedule 40 Pipe

Length (Feet)

0-10 1/2 3/8

10-40 1/2 1/2

40-100 1/2 1/2
100-150 3/4 1/2
150-200 3/4 1/2

Schedule 40 Pipe

Inside Diameter (Inches)

Natural Gas LP. Gas

Use an approved pipe sealant compound for NPT fittings. After
all pipe connections are made, apply normal gas line pressure:

7.0” W.C. for natural gas; 11.0” W.C. for LP gas (propane) and
use an approved leak detection solution to test for the tightness
of each pipe connection joint.

IMPORTANT: All connections must be checked for leaks with a leak detec­tor or soapy water solution. Never check for gas leakage with an open
flame!

* Note: ½ psi = 14” WC (inches water column).

PAGE 12

INSTALLATION

DOOR OPERATION (ALL MODELS)

The glass door is mounted on a hinge at the top of the firebox
and is secured in the closed position by the draw latch mounted
on the bottom of the firebox. The latch tension is preset at the
factory. Over time, adjustment of the latch tension may be nec­essary to maintain a tight door seal. This adjustment can be
made by spinning the latching rod in the rod guide. Care should
be exercised to not adjust the tension too high.

If glass door removal is required for replacement or mainte­nance, the door can be removed in the open position by lifting it
straight up and disengaging the hinge. Do not attempt to re­move or replace broken glass in the door assembly. Contact
your Lennox dealer for glass replacement. To Remove Door:

1. Locate latch below door (see following picture). Pull latch
forward until bottom of door releases.

2. Swing bottom of door outward until door releases at top,
then lift door up and off.

PAGE 13

INSTALLATION

GAS APPLIANCE FINAL ASSEMBLY (ALL MODELS)

After the appliance has been properly installed and all gas con­nections have been made and tested, you can now install the
log set.

INSTALLING LOG SET:
WARNING: If logs are not installed according to the direc-

tions in this manual, flame impingement and improper com­bustion could occur and result in excessive production of
carbon monoxide (CO), a colorless, odorless, toxic gas.

This appliance is equipped with a five-piece log set. Carefully
install the logs into the firebox as shown on this page. All logs
should fit down onto pins and mounts provided. This will en­sure a proper flame and safe combustion.

1. Carefully place the largest log in the rear of the firebox as
shown in the following illustration.

4. Install the center top twig as shown in the following illus­tration.

5. Install the left top twig as shown in the following illustra-

tion.

2. Install the front log and embers as shown in the following
illustration.

3. Install the right top twig as shown in the following illustra­tion.

Glowing Embers

Two packages of ember material have been included with the
gas appliance. Unpackage and divide the fine ember material
(mineral wool) into thumbnail sized pieces. Distribute the
pieces over the top of the front burner ports, filling the area in
front of the forward log and running the full length of the
burner.

PAGE 14

INSTALLATION

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INSTALLATION CHECK LIST (ALL MODELS)
Read and understand these instructions before using ap­pliance. Go through this installation checklist:

 Ensure that the log set is properly installed. Use cau-

tion when handling the logs. See page 14.

 Reinstall the door frame assembly. See Door Assem-

bly on this page.

WARNING: DO NOT OPERATE APPLIANCE WITH THE

GLASS FRONT REMOVED, CRACKED OR BROKEN.
REPLACEMENT OF THE GLASS SHOULD BE DONE
BY A QUALIFIED TECHNICIAN.

 Ensure venting termination cap is unobstructed.

 Check to see that wiring is correct and is enclosed

inside the stove pedestal base (See page 22).

 (Model L20 DVF-2) Ensure that the relief door is

properly closed. (see Combustion Chamber Relief
Door on page 17).

 Verify that the gas line has been purged of air.

 Test all connections for leaks (factory and field) with

a leak detector or soapy water solution. If you smell
gas, do not attempt to light this appliance. Follow
safety instructions on the front cover of this manual.

 Burner Air Shutter opening to be:

Natural Gas – 1/4 open, Propane 1/2 open.

Some adjustment from standard may be necessary

for the desired flame characteristics (see Burner
Flame Appearance, page 21). To adjust air shutter:

1. Remove burner from firebox by removing the 2

nuts as shown in the following picture. Then lift
burner up and out of firebox.

2. Adjust gap as shown in following picture.

Loosen setscrew
using Phillips

ir Shutter

NG = 1/4 Open (1/8” gap)
LP = 1/2 Open (1/4” gap)

screwdriver

Burner Assembl

3. Reinstall burner. Do not overtighten nuts (finger tight
only).

 Light the appliance following the instructions on page 16 (Care

and Operation). Relight the main burner in both the HI, and LO

positions, and verify proper burner ignition and operation.

 Perform Spillage Test Procedure (see Spillage Test Procedure,

page 24).

 With burner lit, check to make sure that the inlet gas and mani-

fold pressures are correct (see Gas Pressure, page 4). Verify that
the pilot and main burner ignition and operation are correct.

NOTE: Upon the initial firing of your new gas stove, you may notice
an odor. This may last up to two hours. It is recommended to open
the windows to allow fresh air to circulate into the room. (see
“Break In” Period, page 17).

WARNING: IF THE PILOT DOES NOT LIGHT AFTER 1 MINUTE, WAIT
AT LEAST 5 MINUTES FOR GAS TO CLEAR BEFORE ATTEMPTING
AGAIN.

Air Shutter

Remove 2 nuts, then
lift burner out of
firebox.

Burner Assembl

PAGE 15

CARE AND OPERATION

(ALL MODELS)
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions ex­actly, a fire or explosion may result causing property
damage, personal injury or loss of life.

A. This appliance has a pilot which must be lit. When lighting

the pilot, follow these instructions exactly.

B. BEFORE LIGHTING smell all around the appliance area for

gas. Be sure to smell next to the floor because some gas
is heavier than air and will settle on the floor.
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 a neighbor’s
phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire
department.

C. Use only your hand to push in or turn the gas control

knob. Never use tools. If the knob will not push in or
turn by hand, don’t try to repair it, call a qualified service
technician. Force or attempted repair may result in a fire
or explosion.

D. Do not use this appliance if any part has been under water.

Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and
any gas control which has been under water.

Pilot Adjustment Screw

Piezo Igniter

Thermocouple

Gas Control Knobs

Convertible HI/LO
Regulator

Inlet
Pressure

Igniter
Electrode

Pilot
Hood

Regulator
Cap

Wiring
Terminals

Outlet Pressure Tap

Thermopile

LIGHTING AND SHUTDOWN INSTRUCTIONS

1. STOP! Read the safety information on this page or on label (on ap­pliance).

2. Turn off all electrical power to the appliance (unplug blower power
cord). Make sure the burner ON/OFF switch is in the OFF position.

3. To gain access to the gas controls, swing the control access door
open. The control access door is located directly under the window.

4. Push in gas control knob slightly and turn clockwise

3 to “OFF.”

NOTE: Knob cannot be turned from “PILOT” to “OFF” unless knob is
pushed in slightly. Do not force.

5. Wait five (5) minutes to clear out any gas. Then smell for gas, in­cluding near the floor. If you smell gas, STOP! Follow “B” in the
safety information above on this label. If you don’t smell gas, go to
the next step.

6. Visually locate the pilot located in the center of the firebox beneath
the rear ceramic log.

7. Turn knob on gas control counterclockwise

4 to “PILOT.”

8. This appliance contains a spark ignition system (piezo igniter), which
is used to light the pilot. Push in the gas control knob all the way and
hold it in. Immediately press the button on the piezo igniter located
to the left of the gas control knob. The spark produced by the piezo
igniter should light the pilot. Continue to hold the control knob in for
about one (1) minute after the pilot is lit. Release the gas control
knob and it will pop back up. Pilot should remain lit.

•If it goes out, repeat steps 4 through 8.

•If the knob does not pop up when released, stop and immediately

call your service technician or gas supplier.

•If the pilot will not stay lit after 3 or 4 tries, turn the gas control knob

to “OFF” and call your service technician or gas supplier.

1. Turn gas control counterclockwise

4 to “ON.” Use rocker

switch, located either on the control panel or the exterior side
panel, to operate main burner. Adjust variable pressure dial
(RB Regulator / Flame Height Control) to set burner flame to
desired heat output.

2. Swing the control access door closed.

3. Turn on electrical power to the appliance (plug in blower power
cord. See page 17, Circulation Blower Operation.)

TO TURN OFF GAS TO THE APPLIANCE

1. Turn off all electric power to the appliance if service is to be per­formed.

2. To gain access to the gas controls, swing the control access door
open. The control access door is located directly under the window.

3. Push in gas control knob slightly and turn clockwise

3 to “OFF.”

NOTE: Knob cannot be turned from “PILOT” to “OFF” unless knob is

pushed in slightly. Do not force.

4. Swing the control access door closed.

PAGE 16

CARE AND OPERATION

ALL MODELS

“BREAK-IN” PERIOD

The finish on this appliance is a high temperature paint that
requires time and temperature to completely cure. The curing
process will take 2 or 3 burns (heat up and cool down peri­ods). We recommend that you ventilate the house during the
initial burns. The paint emits non-toxic odors during this proc­ess.

KEEP YOUR HOUSE WELL VENTILATED DURING THE CURING
PROCESS TO PREVENT ACTIVATION OF YOUR HOME SMOKE
DETECTOR.

Do not turn on a blower during the break-in process. Do not
place anything on the stove surface until the paint is com­pletely cured. Do not attempt to repaint the stove until the
paint is completely cured. If the surface later becomes stained
or marred, it may be lightly sanded and touched up with spray
paint (See Small Area Paint Touch-Up, page 20). Paint is avail­able at your local authorized Lennox Hearth Products dealer.
Never attempt to paint a hot stove.

COMBUSTION CHAMBER RELIEF DOOR

This appliance is equipped with a relief door in case of delayed
ignition blowback. If the relief door opens, remove back panel
and inspect for gasket damage. If necessary, replace with fac­tory supplied gasket only. Confirm relief door is closed and
properly seated, then replace back panel.

CIRCULATION BLOWER OPERATION

The speed of the circulation blower is controlled using the
speed control rheostat (see following illustration) on the left
hand side of the control panel. The blower system is designed
with a variable speed control allowing an infinite range of
blower settings to meet the customer’s needs. With the rotary
switch turned fully CCW 4, the blower is off. Turning the
switch CW 3 will activate the blower at its maximum speed.
Further rotation of the switch in the CW direction will reduce
the speed of the blower. At approximately 270° of CW 3 rota­tion, the switch provides a minimum setting for blower speed.

Thermostatic feature: With the control switch in any “ON” po­sition, the circulation blower is designed to automatically begin
operation approximately 12 minutes after lighting the main
burner. The blower will turn off approximately 15 minutes
after the main burner is shut-off.

KNOB

SIDE VIEW SHOWN

RHEOSTAT

PAGE 17

PROPANE CONVERSION

PROPANE CONVERSION PROCEDURE (ALL MODELS)
(Only required if Propane gas is used)

This appliance is designed to operate on natural gas, or propane
(LP). It is factory set for use with natural gas and requires field
conversion for use with propane. The use of other fuels or com­bination of fuels will degrade the performance of this system
and may be dangerous.

When converting to Propane Gas (LP), it may be necessary to
install (as a minimum) 3 feet of vertical pipe from the appli­ance prior to an offset to ensure optimum product performance.
This may be necessary due to variations in vent configuration
and other numerous factors which affect exhaust flow and air
delivery such as BTU value, ambient temperature, wind condi­tions, altitude, etc.

The conversion kit provided with this appliance contains com­ponents required to convert this appliance from use with natural
gas to use with propane (LP) Gas. All of the components in the
propane conversion kit must be installed in order for the appli­ance to operate safely on propane.

Installation Tools / Supplies

7/16” Open end wrench
Small standard screwdriver
Pipe sealant compound (must be rated for use with LPG gas)

Parts List

• Propane RB Regulator conversion screw (Red indicates LP gas)

• Burner Orifice (If you are at an elevation above 4500 feet do not use

the orifice provided in this kit. Contact your gas supplier to obtain a
smaller orifice)

• Pilot Orifice

• Label, Converted to (LP) Propane – Affix to valve

• Label, Converted to (LP) Propane – Affix to stove body

Avertissement: cet équipement de conversion sera installé par
une agence qualifiée de service conformément aux instructions
du fabricant et toutes exigences et codes applicables de
l’autorisés avoir la juridiction. Si l’information dans cette in­struction n’est pas suivie exactement, un feu, explosion ou pro­duction de protoxyde de carbone peut résulter le dommages
causer de propriété, perte ou blessure personnelle de vie.
L’agence qualifiée de service est esponsable de l’installation
propre de cet équipment. L’installation n’est pas propre et
compléte jusqu’à l’opération de l’appareil converti est chéque
suivant les critères établis dans les instructions de propriétaire
provisionnées avec l’équipement.

IN CANADA:

The conversion shall be carried out in accordance with the re­quirements of the provincial authorities having jurisdiction and
in accordance with the requirements of the CAN1-B149.1 and .2
Installation code.

La conversion devra être effectuée conformément aux recom­mandations des autorités provinciales ayant juridiction et con­formément aux exigences du code d’installation CAN1-B149.1
ET.2.

PROPANE Conversion Procedure

1. Turn off Gas - Turn gas control knob to the off position, and
shut off the gas supply to the valve. If necessary, disconnect
appliance from gas supply.

2. Caution: The gas supply shall be shut off prior to disconnect­ing the electrical power, before proceeding with the conver­sion. Unplug blower power cord.

3. If the installation is at an elevation below 4500 feet, proceed
to step 4.

orifice provided in this kit. Contact your gas supplier to obtain a
smaller orifice).

If you are at an elevation above 4500 feet, do not use the

4. Burner Orifice Installation Procedure:
a. Remove glass door.
b. Remove logs, burner cover, and burner.
c. Use a 7/16” open-end wrench to remove gas burner ori-

fice.

d. Replace the burner orifice with the appropriate burner

orifice (see instruction #3).

e. Use pipe sealing compound rated for LP gas. BE VERY

CAREFUL THAT THE PIPE COMPOUND DOES NOT GET
INSIDE OF THE ORIFICE (THIS COULD RESULT IN
PLUGGING OF THE ORIFICE). Using a 7/16” open-end
wrench to tighten orifice - DO NOT OVER TIGHTEN (fin­ger tight, then 1/2 turn maximum). *Make sure the ori­fice is inserted fully into the primary air shutter fixed
opening.

5. Adjust primary air shutter. Burner Air Shutter opening to be:

Natural Gas – 1/4 open, Propane 1/2 open. Some adjustment
from standard may be necessary for the desired flame char­acteristics (see Burner Flame Appearance, page 21).

6. Replace Pilot Orifice - Using a 7/16” open-end wrench, re­move the pilot burner hood. Replace the pilot orifice with the
one supplied in the propane conversion kit. Then, reinstall
the pilot burner hood. Ensure that the mark on the pilot hood
is lined up with the mark on the pilot mounting plate.

PAGE 18

PROPANE CONVERSION

7. High / Low Pressure Regulator Installation Procedure:

a. Remove regulator cap and conversion screw (see follow-

ing illustration).

b. Install the new conversion screw (Red = Propane LP gas,

Blue = Natural Gas). Ensure that the conversion screw is
finger tight. Install the new regulator cap.

c. Affix conversion label on gas control valve body where it

can easily be seen.

Conversion

Screw

Propane Natural

Red Blue

Color Code

Gas

10. Purge air from the gas line (see #9 above), then connect
propane gas line to the appliance. Connect the fuel line to
the insert inlet (1/2” NPT fitting) using the fitting required.

11. Perform leak Test.

CAUTION : After this procedure is complete with appli-

ance installed and connected to gas line, recheck the
pilot connection and manifold fittings for leaks, using
soapy water or a gas leak detector.

4. Lighting Procedure-See page 15.

NOTE: If the gas control knob is turned to the “off” posi­tion after pilot has been lit, the appliance must be allowed
to cool for at least five minutes before pilot flame can be
relit.

13. Apply the propane conversion label to the rating label.

The Appliance is ready for use with propane fuel as its only
fuel.

8. Reinstall burner cover, logs, ember wool / ceramic rocks
and glass front.

9. Purging Air from Supply Line:

This should only be done by a qualified (& licensed where

applicable) professional. Check with your local building
official for qualifications required to perform this proce­dure.

REFERENCE INFORMATION

See pages 4, 27 and 28 of this manual for the following refer­ence information:

Manifold Gas Pressure

Inlet Gas Pressure

Input Ratings

BURNER FLAME APPEARANCE

A periodic visual check of burner flames should be performed.
The burner flame should appear as indicated on page 21 ­Burner Flame Appearance.

PAGE 19

MAINTENANCE

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Always Turn Off Gas Control Valve Before Cleaning. Annual Maintenance Should Only Be Performed By A
Qualified Service Technician:

(ALL MODELS)

LOG SET

Removing & Cleaning Logs - Carefully remove the logs (remov­ing top logs, then lifting front log out, then rear log). Use care
when handling the fiber logs, as they become quite fragile after
curing. Use a small soft-bristled brush (e.g., a nylon paint
brush) to remove soot, dust or debris that may have accumu­lated on the burner or log set. Remove the logs and burner, and
clean them outside the home in a location with plenty of fresh
air ventilation. Avoid breathing fine particulates of dust that
may be generated. See page 14, Installing Log Set for instruc­tions on reinstalling logs.

Replacing Logs - If logs become damaged by accident or im­proper handling and need replacement, use only the proper re­placement logs from manufacturer, which can be purchased
from your local dealer. See Page 25.

CLEANING BURNER

With the logs removed, vacuum out any foreign matter (lint,
carbon etc.) on the burner. Be sure the burner ports are “open.”

CLEANING VALVE / AIR VENTURI

Clean all lint and dust build-up around the control valve and air
shutter on the venturi. Inspect and clean with a brush or wire
the inlet of the venturi for any spider webs or lint accumulation.

Burner Assembl

Air Shutter

Ensure opening is clear
from lint, dust, spider
webs, debris, etc.

INSPECT WIRING / CAUTIONS:

1) Label all wires prior to disconnection when servicing con-

trols. Wiring errors can cause improper and dangerous op­eration.

2) Verify proper operation after servicing.

3) Inspect and clean all wire connections. Ensure that there is

no melting or damage from rodents. Inspection should in­clude:

• Terminals at the valve

• On / Off switch

• Wall Thermostat / Remote Control (optional kits)

VENTING SYSTEM

A periodic examination of the venting system must be per­formed to ensure that the flow of combustion and ventilation air
is not obstructed (outlet and inlet is open and free from block­age). We recommend that you have your gas appliance checked
yearly by your independent Lennox dealer.

(Model L20 DVF-2) If the vent-air intake system is disassembled
for any reason, the service technician should follow vent manu­factures instructions for proper reassembly and sealing of the
vent-air intake system.

IMPORTANT – APPLIANCES INSTALLED USING SIMPSON DURA-VENT
BRAND PIPE MUST SEAL ALL JOINTS WITH MILL-PAC BLACK, HIGH
TEMPERATURE SEALANT.

CLEAN EXTERNAL SURFACES

External surfaces should be kept clean and dust removed form
air inlets to the appliance. The flow of combustion and ventila­tion air must not be obstructed. The appliance must be kept
clear and free from combustible materials, gasoline and other
flammable vapors and liquids.

SMALL AREA PAINT TOUCH-UP

The stove body is painted with a quality high-temperature stove
paint. Use only model TSPK-C Stove Paint, Catalog # 19L92. Do
not touch-up this appliance with any other paint.

Using one small piece of 320 grit sand paper and lightly sand
the blemish so that the edges are “feathered” or smooth to the
touch between the painted and bare surfaces. Do not let the
sand paper gum up with paint, as this will cause scratches on
the metal surface. If there are any scratches, use 600 grit sand­paper instead. Mask off surfaces you do not want painted. Paint
lightly over the bare surface first as this will act as an undercoat.
Then paint over a larger area in smooth even strokes to blend.

See Break-In Period on page 17 for information on curing the
paint.

CLEANING GLASS

The window on the gas appliance is made from a clear ceramic
material and may be cleaned when cool with any non-abrasive
product designed for use on glass windows. Do not use abra-
sive cleaners on glass. The viewing glass should be cleaned
periodically. Exterior glass may be cleaned with a glass cleaner
as desired. Interior glass - use soap and water, or commercial
glass cleaner recommended for stove glass.

Note: Each time the appliance is lit, it may cause condensation
and fog on the glass. This condensation and fog will disappear
in a few minutes.

CLEANING BLOWER INTAKE

The blower air intake requires cleaning at least once a year to
remove lint, dust, etc. If there are pets in the dwelling, the intake
should be cleaned at least twice a year.

PAGE 20

MAINTENANCE
Always Turn Off Gas Control Valve Before Cleaning. Annual Maintenance Should Only Be Performed By A
Qualified Service Technician:

(ALL MODELS)

PERIODIC CHECK OF PILOT AND BURNER FLAMES

Check the operation of the pilot and cycle the burner. Visually
check the flame of the burner making sure the flames are
steady; not lifting or floating. The flame color should be blue at
the burner with yellow body and tops.

Cycle unit a minimum of 2 times

• Watch for smooth burner ignition and shut down.

• Burner: Check flame patterns. Ensure that burner flame

appearance does not vary greatly from diagram shown on
this page.

• Pilot: Ensure pilot flame appearance does not vary greatly

from diagram shown below.

PILOT FLAME APPEARANCE

A proper pilot flame should consist of torch-like flame issuing
from the pilot hood as shown in illustration below.

Proper Pilot Appearance

BURNER FLAME APPEARANCE

A periodic visual check of the pilot and burner flames should
be performed. If either the pilot or burner flame do not show
proper appearance or behavior, as outlined here, consult a
qualified gas appliance technician.

A proper burner flame is shown above. The burner flame
should have the following characteristics after initial start-up
(let appliance burn 15 to 20 minutes prior to accessing flame
appearance):

• Excessive impingement (contact of flame with logs)
should not occur.

• Rear burner flames should have yellowish tips; no soot
should form at burner flame tips.

• Flames should not raise off of burner (no “lifting” of
flame).

Air Shutter Adjustment

The flame can be adjusted to give the proper flame appearance
and to prevent sooting on the window or logs by adjusting the
position of the primary air shutter (located at the rear center
inlet to the burner). The air shutter should be positioned ap­proximately 1/4 open for Natural Gas and approximately 1/2
open for LP Gas. . See page 15, Burner Air Shutter.

NOTE: During periods of high natural gas demand, the gas
supplier may add “make-up gases” to the pipeline. This addi­tion will change the composition of the supply gas, and may
cause a change in burner flame appearance. You may also
notice soot formation on the logs and viewing windows.
Check with your gas supplier if you suspect a change in the
composition of your gas supply.

PAGE 21

WIRING DIAGRAMS

e

e

e

V

e

V

GAS CONTROL AND SAFETY SYSTEM WIRING DIAGRAM

CAUTION: Label all wiring prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous opera­tion. Verify proper operation after servicing.

The gas control wiring diagram shown here should be used by service technicians for guidance when troubleshooting problems with
the pilot safety (millivolt) system or burner remote control system or when locating system components for repair / replacement.
Note: If replacement of any of the original wire is necessary, use 105°C thermoplastic wiring.

MODEL L20 BF-2 MODEL L20 DVF-2

Burner ON/OFF

Switch

Igniter

Thermocouple

Gas
Pilot

Thermopil

Pilot
Assembly

Burner ON/OFF

Switch

Thermocoupl

Igniter

Gas

Pilot

Thermopil

Pilot
Assembly

Wall Th

rmostat

(optional)

ent Spill

Switch

Wall Thermostat

CIRCULATING BLOWER WIRING DIAGRAM (ALL MODELS

Thermostatic

Switch (fan disc)

ariable Speed

Control

(rheostat)

(optional)

Microswitch for

Control Panel Light

Ground

Convection Blower

(room air circulation blower)

Power Cord

120 V AC

AC Power

Supply

Control

Panel

Light

PAGE 22

TROUBLESHOOTING Qualified Technicians Only

(ALL MODELS)

1) Pilot will not light, and Piezo Igniter does not
produce a heavy blue spark.

2) Pilot will not light, but Piezo Igniter produces a
heavy blue spark.

3) Pilot will not stay lit. a. Thermocouple is not firmly connected to control

4) Pilot flame stays lit, but main burner will not
light.

5) Main burner stays lit for up to 10 minutes and
then shuts off, pilot flame remains lit.

6) Smell of gas a. Loose fittings may be allowing gas to leak out. • Check all joints for leakage: pilot assembly,

7) A thin coating of black soot forms on the win­dow. NOTE: See page 20, Cleaning Glass.

8) A white coating forms on windows, logs, and /
or inside walls of firebox.

9) Circulation blower makes a humming sound,
but there is no circulation air.

REFERENCE INFORMATION FOR QUALIFIED TECHNICIAN:
Thermopile / Thermocouple Operation

♦ Thermopile: Millivolt production should be a minimum of 325 MV

with pilot only.

♦ Thermocouple: Millivolt product-ion should be a minimum of 14

MV with pilot only.

PROBLEM

CAUSE(S)

a. Electrode wire (at Piezo Igniter) not pushed

completely on.
b. Piezo igniter is defective
a. Incorrect lighting procedure.
b. No gas to appliance due to shut valves or dis-

connected gas lines.

valve.
b. Pilot flame is not directed to top of thermocou-

ple.
c. Thermocouple is defective. Make sure connec-

tion is solid.
a. Burner control switch (on control panel) is in

"OFF" position; or thermostat (if installed) is

turned off or temperature setting is too low.
b. Electrical wiring is damaged or poorly con-

nected
c. One of the following components may be de-

fective: burner control switch, thermostat, vent

spill switch, or thermopile.

a. Flue / vent is blocked; flue gas is "spilling",

which activates the safety switch and shuts

down the appliance.
b. (B-Vent) The house is negatively pressurized.

a. Burner primary air inlet is restricted or

blocked.

b. Flames make contact with logs or other sur-

faces.

c. Improper venting.

a. Residues / impurities being burned off. • Follow cleaning guidelines outlined in the

a. Impeller blades in circulation blower are dirty.
b. Circulation blower is defective.

Drop out rate

♦ TP 50-60 MV
♦ TP 1 1/2-2 Min. (3 max.) if longer, replace thermopile.

• Make sure connections are solid.

• Replace piezo igniter.

• Carefully follow the lighting / operating in-

structions found in the appliance of this
owner's manual.

• Check for multiple gas shut-offs; check gas
supply lines.

• Ensure thermocouple is fully inserted into pilot
assembly.

• Replace thermocouple.

• Position the burner control switch to "ON"; or

adjust the thermostat. Refer to manufacturer's
instructions for thermostat.

• Refer to Control and Safety Wiring Diagram
(page 22) and check electrical connections.

• Refer to Control and Safety Systems Wiring
Diagram (page 22). Electrically bypass com­ponents one at a time and replace defective
item. See page 24 for Spill Switch trouble­shooting.

• Examine venting system for blockage. Re­move any blockage.

• Open a window to see if the problem is cor­rected. See page 24 for Spill Switch trouble-
shooting.

gas supply system, main burner assembly, pi­lot and burner adjustment screws. Use a
proper leak check solution. WARNING: Never
use an open flame to check for leaks.

• Be sure all openings (fresh air inlets) in stove
are free from dust and debris. Recheck these
areas periodically.

• Make sure ceramic logs are in their correct
positions.

• Check for flue blockage, disconnected flue,
improper installation. Make appropriate cor­rections.

MAINTENANCE section of this manual.

• Disconnect electrical power to circulation
blower, access blower and clean impeller
blades as outlined in the MAINTENANCE sec­tion of this manual.

• Replace blower.

SOLUTIONS

PAGE 23

TROUBLESHOOTING Qualified Technicians Only

(MODEL L20 BF-2 ONLY)
SPILL SWITCH

This appliance is equipped with a “Spill Switch” which is a
safety device that will shut off gas to the burner in case of sus­tained back draft or flue gas spillage from the draft hood. The
purpose of this safety device is to prevent potentially harmful
gases from entering your home in the event of a blockage in the
vent system. Once the switch has been activated, the burner
cannot be relit until the switch is reset manually (see Accessing
and Resetting Spill Switch on this page). Repeated tripping of
the switch may indicate there is an obstruction in the venting
system. Other possible causes for the spill switch tripping are
listed below (ordered from most likely to least likely). Note: En­sure that appliance is cold before performing any checks.

Troubleshooting Check List (Qualified Technicians Only)

 Flue Blockage - Check venting system for blockage (e.g. bird

nest, damage, etc.).

 Down draft (Is a high wind termination cap installed?).
 Examine entire venting system for faults such as discon-

nected joints or damaged vent sections.

 Check the vent sizing according to specifications, and vent

configurations (correct venting system, if necessary).

 Inadequate make-up air supply in the dwelling, resulting in

negative pressure, inhibiting exhaust flow of the appliance.
(evaluate and determine ways to increase make-up air, if nec­essary, within the area of the installation).

 Defective spill switch (very rare) - Disconnect wires from Spill

Switch. Set Multimeter on ohms and do an ohm check between

terminals on switch. A “O” ohms reading indicates a good switch.
An infinite ohms of “1” reading indicates a defective (or open)
switch.

If spillage is suspected, a simple spillage test can be conducted
to confirm or out rule a spillage condition (see Spillage Test on
this page).

ACCESSING AND RESETTING SPILL SWITCH

1. UNPLUG BLOWER POWER CORD.

2. Using a ¼” nut driver, remove Rear Access Panel (see Fig. 1).

Stove Back

Rear Access

Panel

Draft Hood

Spill Switch

Fig. 2

Reset Button

Fig. 3

Press In This
Red Reset Button

Spill Switch

SPILLAGE TEST PROCEDURE

A flue spillage test is recommended as part of the installation
and periodically afterwards.

1. Remove Rear Access Panel, if necessary (Fig. 1).

2. Close all the doors and windows in the room. Turn ON all
exhaust fans in the home.

3. Light the appliance. Adjust burner flame to highest setting
and operate for approximately 10 minutes before checking
for spillage.

4. Use an open flame (preferably a wooden match) or smoke
(cigarette, burning rope) to determine if spillage is present.
To test for spillage, move the flame or smoke device across
the opening at the bottom of the draft hood as shown be­low. If the flame or smoke is drawn into the opening, there
is no spillage. If the flame or smoke is blown out or away
from the opening, spillage is present and corrective action
should be taken before operating the appliance (see bullets
under Spill Switch on this page).

Stove Back

Remove screws

indicated by arrows

Fig. 1

3. Locate Spill Switch and press the red button in the center of
the switch (press in firmly until button stays depressed). See
Fig. 2, 3 & 4.

4. Perform Spillage Test prior to reinstalling Rear Access Panel
(see Spillage Test Procedure on this page).

Draft Hood

Spill Switch

Fig. 4

5. Reinstall Rear Access Panel (see Fig. 1).

PAGE 24

Flame drawn
in, indicates
no spillage

REPLACEMENT PARTS – Models: L20BF-2 & L20 DVF-2

0

Item # Catalog # Description Where Used

1 17M63 Door Assembly, Charcoal All
2 52L38 Upper Trim Assembly All
52L37 Blower, Air Circulating All
3 52L12 Thermal Fan Switch All
4 34121H
5 10050088 Rheostat (speed control for blower) All
6 12058820 Power Cord (blower) All
7 52L13 On / Off Switch, Burner All
8 64L98 Control Valve NG (with LP Conv. Kit) All
9 52L15 Pilot Assembly NG All
10 15050040 Orifice, #40, NG (0-4500’ / 1370m) All
10 10850187 Orifice, #53, LPG (0-4500’ / 1370m) All
12 17M61 Burner Assembly All
13 17M62 Log Set All

Disc, High Limit, Manual Reset (Spill Switch) L250-30F

L20 BF-2

1

7

5

2

13

4

3

6

8

1

9

12

For the location of the nearest Dealer for replacement parts, contact: Lennox Hearth Products; 1110 West Taft Avenue; Orange, CA
92865
PAGE 25

OPTIONAL ACCESSORIES – Models: L20BF-2 & L20 DVF-2

Item # Catalog # Model Description

1 14M07 DK2-G Door Kit, L20, Gold
2 14M05 BRK-L20 Brickaded Interior Kit, L20
3 H0251 RC-STAT Deluxe Remote Control (Thermostatically controlled)
4 H0249 (RC) RC Remote Control (Standard On / Off)

5 89L36 WTK Wall Thermostat Kit
6 19L92 TSPK-C Touch-up Spray Paint Kit, Charcoal
7 88L53 FGE Glowing Embers, 1 oz bag

1

3

6

4

2

5

7

PAGE 26

SPECIFICATIONS: Model L20 BF-2

Flue Size 4” - Top Vent

Height Overall 29”
Height to Flue
Outlet 28 ¾”

Width 23”

Depth 15”

Fuel Natural Gas (standard)
(or) LP Gas (convertible).
Gas inlet 3/8” NPT-Male / Flex Line
(or) remove flex, 3/8” NPT–Female Flare.

Performance Variable Flame Control.
Features High Efficiency Heat Exchanger.
Natural Convection & Radiant Heat.
Standing Pilot / Operates During Power
Outages. Remote Control & Wall
Thermostat Capable.

Technical Honeywell Combination Gas Control
Features Valve, Millivolt - VS8520E. Safety Shut
Down Sensor (Spill Switch).
Pan Burner with Tuned Ports.
Radiant & Fan Assisted Convection
Heat.

Safety Test Tested and certified by CSA to ANSI standards.

Z21.88a-2003 • CSA 2.33a - M98-2003. Vented
Gas Fireplace Heater

Heat Input 17,000 to 26,000 BTU’s (Nat. Gas)
17,000 to 24,000 BTU’s (Propane)

Ship Weight 185 lb.’s

Dimensions shown are approximations only (+ / - ¼”)

SPECIFICATIONS

GAS TYPE NATURAL GAS PROPANE (LP) CLEARANCES TO COMBUSTIBLES
Orifice Size #40 -.098 #53-.0595” Back Wall Min. 2 In. / 51 mm
Minimum Supply Pressure 4.5” WC 10.5” WC Side Wall Min. 12 In. / 305 mm

Maximum Supply Pressure 10.5” WC 13.0” WC Corner (45° angle)s
HIGH SETTING stove corner to wall, min. 2 In. / 51 mm

Manifold Pressure 3.5” WC 10.0” WC Ceiling Height Minimum 65 In. / 1651 mm
Input BTU/HR 26,000 24,000 Alcove Min. Height 65 In. / 1651 mm
LOW SETTING Alcove Min. width 47 In. / 1194 mm
Mainfold Pressure 1.8” WC 6.6” WC Alcove - Max. Depth into
Input BTU / HR 17,000 17,000 stove face to alcove opening 24 In. / 610 mm

♦ Altitude - U.S.A. 0-4,500 Ft. (0-1372M) No derating
♦ Altitude - Canada 0-4,500 Ft. (0-1372M) No derating

For installation higher than altitudes shown above, reorifice per Gas Codes.

This Appliance is equipped at the factory for the use with Natural Gas or Propane (LP). Appliances using propane must be field conversed using
the LP Conversion Kit supplied with appliance.

* With the orifice, manifold pressure and input ratings shown
above.

Top View

Side View

PAGE 27

SPECIFICATIONS: Model L20 DVF-2

Flue Size 4” – Top Vent
Intake Pipe 6.625” (6 5/8”)

Height Overall 30 1/2”
Height 29”

Width 23”

Depth 15”

Fuel Natural Gas (standard)
(or) LP Gas (convertible).
Gas inlet 3/8” NPT-Male / Flex Line
(or) remove flex, 3/8” NPT–Female Flare.

Performance Variable Flame Control.
Features High Efficiency Heat Exchanger.
Natural Convection & Radiant Heat.
Standing Pilot / Operates During Power
Outages. Remote Control & Wall
Thermostat Capable.

Technical Honeywell Combination Gas Control
Features Valve, Millivolt - VS8520E. Safety Shut
Down Sensor (Reverse Flow Safety Switch).
Pan Burner with Tuned Ports.
Radiant & Fan (optional) assisted
convection heat.

Safety Test Tested and certified by CSA to ANSI standards.

Z21.88-1998 • CSA 2.33a - M98. Vented Gas Fire­place Heater

Heat Input 17,000 to 26,000 BTU’s (Nat. Gas)
17,000 to 24,000 BTU’s (Propane)

Ship Weight 185 lb.’s

Dimensions shown are approximations only (+ / - ¼”)

SPECIFICATIONS

GAS TYPE NATURAL GAS PROPANE (LP) MINIMUM CLEARANCES TO COMBUSTIBLES
Orifice Size #40 -.098 #53-.0595” Back Wall Min. 2 In. / 51 mm
Minimum Supply Pressure 4.5” WC 10.5” WC Side Wall Min. 12 In. / 305 mm
Maximum Supply Pressure 10.5” WC 13.0” WC Corner (45° angle)s
HIGH SETTING stove corner to wall, min. 2 In. / 51 mm
Manifold Pressure 3.5” WC 10.0” WC Ceiling Height Minimum 65 In. / 1651 mm
Input BTU / HR 26,000 24,000 Alcove Min. Height 65 In. / 1651 mm
LOW SETTING Alcove Min. width 47 In. / 1194 mm
Mainfold Pressure 1.8” WC 6.6” WC Alcove - Max. Depth into
Input BTU / HR 17,000 17,000 stove face to alcove opening 24 In. / 610 mm

♦ Altitude - U.S.A. 0-4,500 Ft. (0-1372M) No derating
♦ Altitude - Canada 0-4,500 Ft. (0-1372M) No derating

For installation higher than altitudes shown above, reorifice per Gas Codes

This Appliance is equipped at the factory for the use with Natural Gas or Propane (LP). Appliances using propane must be field conversed using
the LP Conversion Kit supplied with appliance.

* With the orifice, manifold pressure and input ratings shown
above.

Top View

Side View

PAGE 28

SAFETY/ LISTING LABEL (RATING PLATE)

PAGE 29

SAFETY/ LISTING LABEL (RATING PLATE)

PAGE 30

OWNERSHIP RECORDS

Dealer’s Name:

Dealer’s Address:

City: State: Zip Code:

Serial Number: Date of Purchase: Date Installed:

Notes:

SERVICE AND MAINTENANCE LOG

Service Service Service
Date Technician Description

PAGE 31

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

LENNOX reserves the right to make changes at any time, without notice, in design, materials,
specifications, prices and also for discontinued colors, styles and products.
Consult your local distributor for fireplace code information

Printed in U.S.A  LENNOX HEARTH PRODUCTS 2001

P/N 775,021M REV. C 08/2004 1110 West Taft Avenue • Orange, CA 92865

.