Lennox Hearth LSM40ST-P, LSM40ST-N Electronic Appliance Checkout, Pilot Assembly

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LENNOX HEARTH PRODUCTS • MONTEBELLO® SEE-THROUGH DIRECT-VENT GAS FIREPLACES (LSM40ST-N / LSM40ST-P) • CARE AND OPERATION INSTRUCTIONS

Burner Air Shutter Adjustment Procedure

WARNING

Hot GLASS WILL CAUSE BURNS.

DO NOT TOUCH GLASS UNTIL COOLED.

•Fireplace surfaces get EXTREMELY HOT!

•The glass on the front of the fireplace reaches EXTREMELY HIGH temperatures and can cause severe burns if touched. Even after the gas is turned off, fireplace surfaces remain extremely hot.

CAUTION

Risk of personal injury

or property damage.

•Air shutter adjustment should only be performed by a qualified professional service technician.

•Soot will be produced if the air shutter is closed too much. Any damage due to carboning resulting from improperly setting the air shutter is not covered under the warranty.

1.Light the appliance (follow lighting proce- dure in Care and Operation Instructions or on lighting label in control compartment).

2.Allow the burner to operate for at least 30 minutes while continuously observing the flame to ensure that the proper flame ap- pearance has been achieved (see Figures 20 and 21).

3.Adjust the air shutter using the Air Shutter Adjustment Lever on the lower right side of the firebox (see Figure 20).

•For more OPEN air shutter, slide lever to the RIGHT.

•For more CLOSED air shutter, slide lever to the LEFT.

A minimum shutter setting is designed into the venturi by four 1/16"‑inch tabs.

•If the flame appears weak or sooty (as described on the previous page), adjust the air shutter until proper flame appear- ance is achieved.

•If flame stays lowered blue, incremen- tally adjust the air shutter to a more CLOSED position until proper flame appearance is achieved.

Note: See Figures 20 and 21 for proper burner flame appearance.

Electronic Appliance Checkout

To light the burner, refer to the lighting instruc- tions on Page 21. Ensure the igniter lights the pilot. The pilot flame should engulf the flame sensor as shown in Figure 22.

PILOT ASSEMBLY

Proper Pilot Flame Appearance

Igniter

Rod

Pilot Hood

Flame

Sensor

Pilot

Nozzels

Figure 22

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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

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Contents 506025-05 Rev. C 05/2011 Important Safety InformationSafety 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 Appliance Operation Notices Appliance Installation Service, and MaintenanceWarranty Information Inputs Inputs and EfficienciesOrifice Sizes Sea Level to High Altitude All Models Burn-in PeriodON/OFF Switch Switches from Gas Controls / Control Compartment AccessOperation and care of your appliance Is OFFRemote Control System Slider Switch Remote Position Intermittent/Standing Pilot ModeRoom Temperature Flame On Maximum Level Indicatiors Key LockGlass Cleaning See Maintenance Schedule,Clean Control Compartment Clean Logs and BurnerHot Glass will Cause Burns Install only when fireplace is OFF and ColdRemoving Glass Doors, Mesh Pull Screens, and Modesty Panel See FigureBag of Glowing Embers IMPORTANT! Ember pieces must be As Small and Thin as a dimeControl Side Control Side Top view of burner shown Log, Center Log, Top Right Install logs reference and Table Log, Top Left Log, Top FrontGroove Location PinBurner Air Shutter Adjustment Guidelines Burner AdjustmentsFlame Appearance and Sooting Burner Flame Appearance Control SideElectronic Appliance Checkout Pilot AssemblyWiring Diagram Ordering Replacement partsAndiron Kits Accessory ComponentsCeramic and Porcelain Panel Kits Bag of Glowing Embers Bag of Volcanic StoneArch Screen Kits Outdoor KitClassic Screen Kits Barrier Screen KitsBe performed Slide the switch on the receiver to OFFInstructions D’ALLUMAGE Do not touch or attempt to clean glass while hot Maintenance ScheduleSymptom Possible causes Corrective action Troubleshooting the Montebello LSM40ST FireplaceCat. No Replacement Parts ListGas Controls SIT Electronic Replacement Parts Illustration Page 506025-05 Rev. C 05/2011
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