Lennox Hearth L20 DVF-2 manual Model L20 BF-2 only Spill Switch, Spillage Test Procedure

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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 sus- tained 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 Fig. 2Reset Button listed below (ordered from most likely to least likely). Note: En-

sure that appliance is cold before performing any checks.

Draft Hood

Spill Switch

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 nec- essary, 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

Remove screws

indicated by arrows

Fig. 1

Spill Switch

Press In This

Red Reset Button

Fig. 3

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 be- low. 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

Flame drawn

Draft Hoodin, indicates no spillage

Spill Switch

3.

Locate Spill Switch and press the red button in the center of

 

 

 

 

Fig. 4

 

 

the switch (press in firmly until button stays depressed). See

 

 

 

 

 

 

 

Fig. 2, 3 & 4.

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

4.

Perform Spillage Test prior to reinstalling Rear Access Panel

 

(see Spillage Test Procedure on this page).

 

 

 

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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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