Lennox Hearth LSM40ST-N-PV installation instructions Symptom Possible causes Corrective action

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LENNOX HEARTH PRODUCTS • MONTEBELLO® SEE-THROUGH POWER VENT DV GAS FIREPLACES (LSM40ST-N-PV) • CARE AND OPERATION INSTRUCTIONS

Troubleshooting GUIDE: ELECTRONIC GAS CONTROL SYSTEM

Note: Before troubleshooting the gas control system, make sure the external gas shutoff valve (located at gas supply inlet) is in the “ON” position.

Important: Valve system troubleshooting should only be performed by a qualified service technician.

 

Symptom

Possible causes

Corrective action

1.

Nothing happens when fireplace

A. Remote Control is not functioning

• Check that wall switchplate is set to REMOTE

 

is turned On/Off (pilot does not

properly.

(if remote was used).

 

spark).

 

• Operate fireplace from wall switchplate.

 

 

 

• Replace batteries in Remote Control and/or Receiver.

 

 

 

 

 

 

B. Gas is not reaching fireplace.

• Check gas supply and gas shutoff valves.

 

 

 

 

 

 

C. Unit is not receiving power.

• Check building circuit breakers to ensure power

 

 

 

is on to fireplace.

 

 

 

 

 

 

D. Damaged igniter wire.

• Check for visible cracked casing, cuts, etc.

 

 

 

 

 

 

E. Damaged pilot assembly.

• Check pilot assembly for visibly broken spark electrode, etc.

 

 

 

 

 

 

F. Batteries low.

• Check voltage on D.C. terminal of batteries in Remote Control.

 

 

 

The value should be around 3.0V.

 

 

 

 

2.

Igniter is sparking, but main

A. Gas is not reaching fireplace.

• Check gas supply and gas shutoff valves (call a service

 

burner does not light.

 

technician, if required).

 

 

 

 

 

 

B. Air in gas line.

• Call a service technician.

 

 

 

 

 

 

C. Loose wires to valve.

• Check control compartment for any obvious loose wiring

 

 

 

(call a service technician, if required).

 

 

 

• Ensure blue and white (2) wires are securely connected to

 

 

 

valve (call a service technician, if required).

 

 

 

 

 

 

D. Loose wires to ignition module.

• Check control compartment for any obvious loose wiring

 

 

 

(call a service technician, if required).

 

 

 

 

 

 

E. Loose sensor wire.

• Ensure sensor wire connection is secure to purple wire of

 

 

 

ignition control (call a service technician, if required).

 

 

 

 

 

 

F. Low voltage.

• Test voltage at AC terminals of module for 24 VAC. If no volt-

 

 

 

age, replace module (call a service technician, if required).

 

 

 

• Check electrical connections between module and gas control.

 

 

 

If okay, replace gas control (valve) (call a service technician,

 

 

 

if required).

 

 

 

 

3.

Main burner comes on,

A. Gas is not reaching fireplace.

• Check gas supply and gas shutoff valves.

 

but then goes out.

 

 

 

B. Loose wires to valve or ignition

• Check control compartment for any obvious loose wiring

 

 

 

 

module.

(call a service technician, if required).

 

 

 

 

 

 

C. Pilot flame is not engulfing sensor.

• Call a service technician.

 

 

 

 

 

 

D. Obstructed vent system.

• Call a service technician.

 

 

 

 

4.

Soot is present on logs and

A. Excessive flame impingement on logs.

• Check for proper placement of logs, volcanic stone, and

 

glass.

 

ember material.

 

 

 

 

 

 

B. Improper air shutter opening.

• Check for proper air shutter adjustment (call a service

 

 

 

technician, if required).

 

 

 

 

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Contents Models LSM40ST-N-PV506025-03 Rev. C 04/2011 Whats InsideSafety Your Fireplace Spanish Seguridad y su chimenea Et toute commande qui a été plongée dans l’eau Important Safety InformationLennox Attaching Safety-in-Operation WarningsColocación de advertencias de seguridad en operación Lennox Hearth ProductsAppliance Operation Notices Appliance Installation, Service, and Maintenance NoticesWarranty Information Efficiencies General InformationPurge Cycle Operation and care of your applianceGas Controls Appliance OperationRemote Control System Flame Level Using the Remote Transmitter Press the ON/OFF keyKey Lock Manual Bypass of the Remote SystemMaintenance Removing Glass Doors, Mesh Pull Screens, and Modesty Panel Install only when fireplace is OFF and ColdInstall one of the glass doors, as follows Hot Glass will Cause BurnsControl Side Top view of burner shown Placement of Volcanic STONE, Glowing EMBERS, and LogsBag of Glowing Embers Control SideLog, Top Front Log, Center Log, Top RightLog, Top Left Detail PinGroove Location Flame Appearance and Sooting Burner AdjustmentsBurner Air Shutter Adjustment Guidelines Pilot AssemblyInformation Ordering Replacement partsWiring Diagram Product ReferenceBag of Glowing Embers Bag of Volcanic Stone Accessory ComponentsAndiron Kits Ceramic and Porcelain Panel KitsBarrier Screen Kits Outdoor KitArch Screen Kits Classic Screen KitsTo Turn OFF GAS to Appliance For Your Safety Read Before OperatingWhat to do if YOU Smell GAS Operating InstructionsComment Couper L’ADMISSION DE GAZ DE L’APPAREIL Pour Plus DE Sécurité Lire Avant DE Mettre EN MarcheQUE Faire SI Vous Sentez UNE Odeur DE GAZ Do not touch or attempt to clean glass while hot Maintenance ScheduleMaintenance Task ProcedureSymptom Possible causes Corrective action Start Troubleshooting Guide Power Vent SystemCat. No Replacement Parts ListGas Controls SIT Electronic Replacement Parts Illustration 2520 Power Vent Replacement Parts506025-03 Rev. C 05/2011

LSM40ST-N-PV specifications

The Lennox Hearth LSM40ST-N-PV is a premium gas fireplace that combines elegance with advanced technology to create an unparalleled heating experience. Designed for both aesthetic appeal and functional efficiency, this model is perfect for homeowners seeking to enhance their living spaces while enjoying the warmth of a traditional fireplace.

One of the standout features of the LSM40ST-N-PV is its sleek and contemporary design. The fireplace boasts a clean face, which allows for a larger viewing area, ensuring that the mesmerizing flames become the focal point of any room. Its glass front adds a modern touch, making it suitable for various interior styles, from classic to contemporary.

In terms of performance, this gas fireplace utilizes the latest innovations in venting technology, offering versatility for installation. The direct vent system draws air from outside for combustion, ensuring optimal efficiency while maintaining indoor air quality. This feature allows homeowners to enjoy a cozy fire without worrying about the impact on the surrounding environment.

The LSM40ST-N-PV is equipped with a powerful, multi-functional remote control, enabling users to adjust the flames, heat settings, and even the blower fan from the comfort of their couch. This user-friendly control system enhances the overall convenience and allows for a customized heating experience.

Another significant characteristic of the Lennox Hearth LSM40ST-N-PV is its high-efficiency rating. With minimal heat loss and effective distribution, this fireplace quickly warms up spaces, offering comfort even during the coldest months. The model also features an adjustable flame height, allowing homeowners to create the perfect ambiance, whether for a cozy evening or a festive gathering.

In terms of aesthetics, the fireplace can be fitted with a variety of decorative media options, such as glass, logs, or stones, catering to individual tastes and enhancing the visual appeal. Additionally, the unit operates quietly, ensuring that the crackle of flames is the only sound heard, promoting a peaceful environment.

Durability is also a key attribute of the LSM40ST-N-PV. Constructed from high-quality materials, it's built to last while requiring minimal maintenance. Easy installation and clear documentation mean that homeowners can enjoy their new fireplace with ease.

In summary, the Lennox Hearth LSM40ST-N-PV gas fireplace offers modern design, advanced technologies, and exceptional efficiency, making it a perfect addition to any home looking to elevate its comfort and style.
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