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Lennox Hearth L20 BF-2 - page 1
INSTALLATION AND OPERATION FREESTANDING VENTED GAS FIRED ROOM HEATERS RETAIN THIS MANUAL FOR FUTURE REFERENC E P/N 775 , 021M Rev . C , 8/04 Models: L20 BF-2 (B-Vent) an d L20 DVF-2 (Direct-Ve nt) Model L20 DV F -2 may be installed in an afterma rket perman ently loca ted, manufact ured ( mobile ) home, where no t proh i b ited b y local code s Rep ...
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Lennox Hearth L20 BF-2 - page 2
IMPORTANT WARNINGS / CAUTIONS CAUTION: READ THIS MANUAL TH OROUGHLY BEFORE STARTING I NST ALLATION. FOR YOUR SAFETY, FOLLOW THE INSTALLATION, OPER ATION AND MAINTENANCE INST R UCTIONS EXACTLY WI THOUT DE- VIATION. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A POSSIB LE FIRE HAZARD AND MAY VOID THE WARRANTY. IF THIS APPLIANCE IS NOT PR OPERLY ...
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Lennox Hearth L20 BF-2 - page 3
TABLE OF CONTENTS PAGE 3 Important Warn ings ........................................................ 2 Testing / Listing, Us ing this Manual ................................. 3 Planning Your In stallation .............................................. 4-6 Manufactured (Mobil) Home R equirements....................... 6 Installation ............... ...
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Lennox Hearth L20 BF-2 - page 4
PLANNING YOUR INSTALLATION PAGE 4 LOCAL AND N ATIONAL CODE REQUIREMEN TS The installation of these appliances must conform with local codes or, in the abse nce of local codes, with the National Fuel Gas Code, (for USA) NFPA 54 / ANSI Z223.1 - latest edition. Air Circulat ion Blow er: The blower elect rical power cord must be electrically grounded p ...
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Lennox Hearth L20 BF-2 - page 5
PLANNING YOUR INSTALLATION PAGE 5 QUESTIONS TO ASK THE LO CAL BUILDING OFFICIAL Correct installation is critical and imp erative for reducing f ire hazards and pe rilous conditions that ca n arise when gas appli- ances function improperly. The a ppliance must be installed per manufacturers’ instructions. Gas appliance equipme nt and installations ...
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Lennox Hearth L20 BF-2 - page 6
PLANNING YOUR INSTALLATION PAGE 6 MODELS L20 BF-2 AND L20 DVF-2 CLEARANCES TO COMBUS TIBLE MATERIALS These appliances can be installed in most residential room configura- tions, parallel to a rear or adjacent wa ll, or in an alcove that allows for the minimum clearances to co mbusti ble surfaces. Your local building inspector should review your pla ...
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Lennox Hearth L20 BF-2 - page 7
INSTALLATION - MODEL L20 DVF-2 (DI RECT-VE NT) VEN TING REQUIREMENTS. This applia nce is d esigned to b e vented wi th a 4” x 6 5/8” direct -vent pi pe. Each dir ect-vent ap pliance m ust use its ow n separa te vent system. PAGE 7 VERTICAL TERMINAT ION WITH NO OFFSETS Min. Vertical Pipe Length: 5 feet Max. Vertical Pip e Length: 25 feet VERTICA ...
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Lennox Hearth L20 BF-2 - page 8
INSTALLATION DIRECT VENT SYSTEM COMPONE NTS – MODEL L2 0 DVF-2 ONLY PAGE 8 The following Direct-Ven t system component s may be safely used model L20 DVF-2. Model # Brand: SECURITY / Description Model # Brand: SIMPSON DURA-VENT / Descripti on SV 0 SHK Standard Horizontal Term. Kit (90 ° Black Elbow, Firestop (2), Horizon- tal Square Term. Cap) 9 ...
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Lennox Hearth L20 BF-2 - page 9
INSTALLATION - MODEL L20 DVF-2 ONLY PAGE 9 Direct Vent R etrofit Of Exist ing Chimney Syst em - An existing Class-A (wood-burning) Me tal Chimney or Mas onry Chimney can be converted to a direct vent system. Use one of the following chim ney conve rsion kits listed below. Have the existing chimney s ystem inspected by a professional prior to the co ...
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Lennox Hearth L20 BF-2 - page 10
INSTALLATION - MODEL L20 DVF-2 ONLY PAGE 10 HORIZONTAL VENT TERMINATION REQUIREM ENTS The venti ng termi nals shoul d not be rec e ssed int o a wall or siding. A = 2” Clearances above grade, veranda, porch, de ck or bal- cony. B = 12” Clearance to window or door that may be opened. C = 9” (USA) Clearance to permanently clo sed window. 12” ( ...
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Lennox Hearth L20 BF-2 - page 11
INSTALLATION MODEL L20 BF-2 ONLY This appliance is designed to be v ented w ith a 4” B-Vent pipe. Each B- Vent appliance must use its own separate vent system. For pipe cleara nces, also s ee pipe ma nufacturers v enting inst ructions. PAGE 11 B-Vent Installation Illustration Approved for verti cal termi nation only . Model L20 BF-2 Maximum Horiz ...
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Lennox Hearth L20 BF-2 - page 12
INSTALLATION PAGE 12 GAS SUPPLY HOOKUP (ALL MODELS) If usin g pipe o ther th an black iron pipe see NFPA 54-National F ire Pro- tection Association / A N SI Z223.1-Ame rican National Standards Institute; and local cod e for specific requiremen ts for the type of pipe used. Alter- native gas piping systems such as CSST may be used subjec t to local ...
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Lennox Hearth L20 BF-2 - page 13
INSTALLATION PAGE 13 DOOR OPERATION (ALL MODELS) The glass door is mounted on a hinge at the top of the firebox and is secured in the closed posi tion by the draw latch mounted on the bottom of the firebox. The latch tension is preset at the factory. Over time, adjustment of t he latch tension may be nec- essary to maintain a tight door seal . This ...
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Lennox Hearth L20 BF-2 - page 14
INSTALLATION PAGE 14 GAS APPLIANCE FINAL ASSEMB LY (ALL MODELS) After the appliance h as been properly installed and all gas c on- nections have been made and t ested, you c an now install the log set. INSTALLING LOG SET: WARNING: If logs are not inst alled accord ing to the di rec- tions in th is manual, flame imp ingement an d improper com- busti ...
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Lennox Hearth L20 BF-2 - page 15
INSTALLATION PAGE 15 INSTALLATI ON CHECK LI ST (ALL MODE LS) Read and understand these inst ructions before usi ng ap- pliance. Go through this installation c hecklist: 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. WARNIN ...
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Lennox Hearth L20 BF-2 - page 16
CARE AND OPERATION PAGE 16 (ALL MODELS) FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you d o not follow t hese instructi ons ex- actly, a fi re or explosi on may resul t causing p roperty damage, personal injury or loss of life. A . This appliance has a pilot which must be lit. When lighti ng the pilot, follow these instructions exactly. B. BEF ...
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Lennox Hearth L20 BF-2 - page 17
CARE AND OPERATION PAGE 17 ALL MODELS “BREAK-IN” PERIOD The finish on this appliance is a hi gh temperature paint that requires time and temperature to completely cure. The curing process will take 2 or 3 burns (heat up and cool down peri- ods). We recommend that you ventilate the house duri ng the initial burns. The paint emits n on-toxic odor ...
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Lennox Hearth L20 BF-2 - page 18
PROPANE CONVERSION PAGE 18 PROPANE CONVERSION PROCEDU RE (ALL MODELS) (Only require d if Propane gas is used) This appliance is desig ned to operate on natural gas, or pr opane (LP). It is factory set for use with natural gas and re quires field conversion f or use with propa ne. The use of othe r fuels or com- bination of fuels will degra de the p ...
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Lennox Hearth L20 BF-2 - page 19
PROPANE CONVERSION PAGE 19 7. High / Low Pressure Regula tor Installation Procedure: a. Remove regulator cap and conversion screw (see follow- ing illustration). b. Install the new conversion scr ew (Red = Propane LP gas, Blue = Natural Gas). Ensure that the conversion screw is finger tight. Install the new regulator cap. c. Affix conversion label ...
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Lennox Hearth L20 BF-2 - page 20
MAINTENANCE Always Turn Off Gas Control Valve Before Cleaning. Annual Maintenance Should Only Be Performed By A Qualified Service Technician: PAGE 20 (ALL MODE LS) LOG SET Removing & Cleaning Logs - Carefully remove the logs (re mov- ing top logs, then liftin g front log out, the n rear log). Use care when handling the fiber logs, as they becom ...
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Lennox Hearth L20 BF-2 - page 21
MAINTENANCE Always Turn Off Gas Control Valve Before Cleaning. Annual Maintenance Should Only Be Performed By A Qualified Service Technician: PAGE 21 (ALL MODELS) PERIODIC CHECK OF PILO T AND BURNER FLAM ES Check the operation of the pilot and cycle the burner. Visually check the flame of the burner making su re the flames are steady; not lifting o ...
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Lennox Hearth L20 BF-2 - page 22
WIRING DIAGRAMS PAGE 22 GAS CONTROL AND SAFETY SYSTEM WIRI NG DIAGRAM CAUTION: Lab el all wiring prior t o disconnection w hen servicing controls. Wiring errors can ca use improper an d dangerous oper a- tion. Verify proper operation after servicing. The gas control w iring diagram shown here should be used by service technicia ns for guidance when ...
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Lennox Hearth L20 BF-2 - page 23
TROUBLESHOOTING Qualified Technicians Only (ALL MODELS) PAGE 23 PROBLEM CAUSE(S) SOLUTIONS 1) Pilot will not light, a nd Piezo Igniter does not produce a h eavy blue sp ark. a. Electrode wire (at Piezo Igniter) not pushed comple tely o n. b. Piezo igniter is defecti ve • Make sure connections are solid. • Replace piezo igniter. 2) Pilot will no ...
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Lennox Hearth L20 BF-2 - page 24
TROUBLESHOOTING Qualified Technicians Only PAGE 24 (MODEL L20 BF- 2 ONLY) SPILL SWITCH This appliance is equip ped with a “Spill Switch” which is a safety device that will shut of f gas to the burner in case of sus- tained back draft or flue gas sp illage from the draft hood. The purpose of this safety device is to prevent pote ntially harmful ...
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Lennox Hearth L20 BF-2 - page 25
REPLACEMENT PARTS – Models: L20BF-2 & L20 DVF-2 For the loc ation of t he neares t Dealer for r eplacem ent parts, c on tact: Lennox Hearth Pro ducts; 1110 West T aft Avenue; Orange, C A 92865 PAGE 25 Item # Catalog # Description Where Used 1 17M63 Door Assembly , Charcoal All 2 52L38 Upper Trim Assembly All 52L37 Blower, Air Circulating All ...
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Lennox Hearth L20 BF-2 - page 26
OPTIONAL ACCESSORIES – Models: L20BF-2 & L20 DVF-2 PAGE 26 Item # Catalog # Model Description 1 14M07 DK2-G Door Kit , L20, Gold 2 14M05 BRK-L20 Brickaded Inter ior Kit, L20 3 H0251 RC-STAT Deluxe Remot e Control (The rmostatically controlled) 4 H0249 (RC) RC Remote Cont rol (Standard On / Off) 5 89L36 WTK Wall Thermostat Kit 6 19L92 TSPK-C T ...
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Lennox Hearth L20 BF-2 - page 27
SPECIFICATIONS: Model L20 BF-2 PAGE 27 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. Perfor mance Var iable F lame Contro l. Features High Efficien cy Heat ...
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Lennox Hearth L20 BF-2 - page 28
SPECIFICATIONS: Model L20 DVF-2 PAGE 28 Flue Size 4” – Top Vent Intake Pipe 6.62 5” (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. Perfor mance Var iable F lame Contro l. Features ...
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Lennox Hearth L20 BF-2 - page 29
SAFETY/ LISTING LABEL (RATING PLATE) PAGE 29 ...
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Lennox Hearth L20 BF-2 - page 30
SAFETY/ LISTING LABEL (RATING PLATE) PAGE 30 ...
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Lennox Hearth L20 BF-2 - page 31
PAGE 31 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 ...
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Lennox Hearth L20 BF-2 - page 32
Printed in U.S.A LENNOX HEARTH PRODUCTS 2001 P/N 775,021M REV. C 08/2004 1110 West Taft Avenue • Or ange, CA 92865 LENNOX reserves the right to make changes at any time, without notice, in design, materials, specifications, prices and also for di scontinued colors, styles and products. Consult your local distributor for fireplace code informa ...
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