Lennox Hearth L20 DVF-2, L20 BF-2 manual GAS Supply Hookup ALL Models, Pressure Testing

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INSTALLATION

GAS SUPPLY HOOKUP (ALL MODELS)

If using pipe other than black iron pipe see NFPA 54-National Fire Pro- tection Association / ANSI Z223.1-American National Standards Institute; and local code for specific requirements for the type of pipe used. Alter- native 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 sup- ply 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, re- move the rear panel. Redirect the flexible gas line through the large hole in the center of the pedestal base for gas supply con- nection.

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 Associa- tion / 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) up- ward 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 up- stream 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 sup- ply 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 test- ing 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. Sedi- ment 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 sup- ply 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

Schedule 40 Pipe

Length (Feet)

Inside Diameter (Inches)

 

Natural Gas

LP. Gas

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

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 detec- tor or soapy water solution. Never check for gas leakage with an open flame!

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

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Contents Freestanding Vented GAS Fired Room Heaters Retain this Manual for Future Reference775,021M Rev. C, 8/04 Important Warnings / Cautions Table of Contents Planning Your Installation Local and National Code RequirementsTool / Equipment List LOW HighQuestions to ASK the Local Building Official Manufactured Mobile Home Requirements Important NotesRear Wall or Alcove CornerVertical Termination with no Offsets Vertical Termination With 2 OffsetsHorizontal Termination With 1 Offset Installation Direct Vent System Components Model L20 DVF-2 onlyInstallation Model L20 DVF-2 only SV4MCKCony Vent Configuration Requirements Model L20 BF-2 onlyFor vent termination requirements, see Pressure Testing GAS Supply Hookup ALL ModelsSupply Line Size Requirements Door Operation ALL Models GAS Appliance Final Assembly ALL Models Installing LOG SETGlowing Embers Installation Check List ALL Models Verify that the gas line has been purged of airALL Models For Your Safety Read Before Lighting Care and OperationGas Control Knobs Lighting and Shutdown InstructionsALL Models BREAK-IN Period Combustion Chamber Relief DoorCirculation Blower Operation Parts List Propane Conversion ProcedurePropane Conversion CanadaReference Information Burner Flame AppearanceMaintenance Air Shutter Adjustment ALL Models Periodic Check of Pilot and Burner FlamesCycle unit a minimum of 2 times Pilot Flame AppearanceWiring Diagrams GAS Control and Safety System Wiring DiagramModel L20 BF-2 Model L20 DVF-2 Troubleshooting Qualified Technicians Only ALL ModelsModel L20 BF-2 only Spill Switch Troubleshooting Check List Qualified Technicians OnlySpillage Test Procedure Replacement Parts Models L20BF-2 & L20 DVF-2 Item # Catalog # Description Where UsedOptional Accessories Models L20BF-2 & L20 DVF-2 Item # Catalog # Model DescriptionSpecifications Model L20 BF-2 Top View Side ViewSpecifications Model L20 DVF-2 SAFETY/ Listing Label Rating Plate SAFETY/ Listing Label Rating Plate Service and Maintenance LOG Ownership Records775,021M REV. C 08/2004

L20 DVF-2, L20 BF-2 specifications

The Lennox Hearth L20 DVF-2 and L20 BF-2 are two innovative gas fireplaces that offer modern heating solutions for homes looking to combine functionality, style, and efficiency. Both models are designed with advanced technology to deliver reliable performance and aesthetics that enhance any living space.

The L20 DVF-2 is a direct vent fireplace that utilizes a sealed combustion system, allowing it to operate efficiently without drawing air from the room. This feature not only improves energy efficiency but also helps maintain indoor air quality since outside air is used for combustion. One of its standout features is the ability to provide a range of heat output options, allowing homeowners to adjust the warmth to their preference. The fireplace comes with a convenient remote control, enabling effortless operation from anywhere in the room.

The L20 BF-2, on the other hand, is a conventional vent fireplace, offering a different installation option ideal for various home designs. Similar to the DVF-2, the BF-2 model provides a wide range of heat output, ensuring comfort in chilly conditions. It features a striking design with a large viewing area, allowing for a mesmerizing flame display that serves as a focal point in any room.

Both models are equipped with Lennox's patented Powerflow technology, which optimizes heat distribution throughout the space. This technology not only enhances comfort but also ensures that energy is used efficiently. The fireplaces also feature easy-to-use controls and customizable flame height settings, giving users precise control over their heating experience.

In terms of design, the L20 DVF-2 and L20 BF-2 come in various finishes and styles, allowing them to seamlessly blend with different home aesthetics. Their sleek and contemporary appearance complements modern interiors, while still fitting into more traditional décor in subtle ways.

Overall, the Lennox Hearth L20 DVF-2 and L20 BF-2 provide effective heating solutions paired with advanced technologies and stylish designs. Whether a homeowner desires a direct vent option or a traditional vent fireplace, both models deliver energy-efficient performance, exceptional heat distribution, and a stunning flame display that can enhance the ambiance of any living space. These fireplaces are not just heating appliances; they are an investment into comfort and elegance for years to come.
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