Lennox Hearth MPD35ST-PM, MPD35ST-NM, MPD35ST-NE manual Electronic Pilot Assembly

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2.Light appliance (follow lighting procedure on lighting label in control compartment or see homeowners manual).

3.Allow the burner to operate for at least 15 min- utes while observing the flame continuously to ensure that the proper flame appearance has been achieved (see Figure 13 ). If the following conditions are present, adjust accordingly.

•If flame appears weak or sooty, adjust the air shutter, incrementally, to a more open position until the proper flame appearance is achieved.

•If flame stays lowered blue, adjust the air shutter, incrementally, to a more closed position until the proper flame appearance is achieved.

4.Leave the control knob (off/pilot/on) in the ON position and the burner OFF/ON switch OFF (& remote switches, if applicable).

5.When satisfied that the burner flame appear- ance is normal, close the lower control compartment door.

Decrease Shutter Opening

Note - Burners are

In This Direction

 

 

omitted in this

 

 

view for clarity.

 

Orifice

 

Air Shutter

 

 

Adjusting

Increase Shutter

Opening

Rod

In This Direction

 

Main Burner Factory Air Shutter

Opening Setting - All Models

Model

Natural

Propane

 

Gas

Gas

MPD35ST

1/8”

1/4”

3.2mm

6.4mm

 

Figure 14

Adjustment Rod Positions

 

(when viewed from above)

Millivolt Appliance Checkout

The pilot flame should be steady, not lifting or floating. Flame should be blue in color with traces of orange at the outer edge.

The top 3/8" (10 mm) at the pilot generator (thermopile) and the top 1/8" minimum (tip) of the quick drop out thermocouple should be engulfed in the pilot flame. The flame should project 1" (25 mm) beyond the hood at all three ports. See Figure 15.

To light the burner, refer to the lighting instruc- tions on Page 15.

MILLIVOLT PILOT ASSEMBLY

Proper Pilot Flame Appearance

Hood

Igniter Rod

Thermocouple

3/8" Min.

 

 

(9 mm)

Pilot

 

Nozzels

 

Thermopile

 

Figure 15

 

Electronic Appliance Checkout

To light the burner, refer to the lighting instruc- tions on Page 16. Ensure the igniter lights the pilot. The pilot flame should engulf the flame sensor as shown in Figure 16.

ELECTRONIC PILOT ASSEMBLY

Proper Pilot Flame Appearance

Proper Flame

3/8" to 1/2"

(9 -13 mm)

Adjustment

 

Pilot

 

Nozzels

Ground

 

 

Electrode

 

Flame Rod

 

Hot Surface

 

Igniter

Figure 16

 

With proper care and maintenance, your appli- ance will provide many years of enjoyment. If you should experience any problem, first refer to the troubleshooting guide in this manual. If problem persists, contact your Lennox distributor.

10

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

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Contents Faire la demande. Numéro de la pièce 875,025CF 875,025M REV. NC 04/2005MPD35ST-NM MPD35ST-NE MPD35ST-PM Listing AgencyCongratulations Orifice Sizes Sea Level to High Altitude All Models Burn-in PeriodManifold Gas Supply Pressure Electronic models Fuel # Fixed Burner Orifice Sizes all models Elevation Natural PropaneSIT Millivolt ApplianceOperation and Care of Your Millivolt AppliancesMaintenance See Maintenance Schedule,Front Glass Enclosure Panel, Removal and Installation See FigureLOG SET LOG SET IdentificationCA B ReferenceRemove front glass enclosure panel from appliance Placement of Glowing EmbersRead LOG Warnings on page 9 Before Proceeding Against The GrateThis appliance is not designed to burn wood. Any attempt to Burner Adjustments Qualified Technicians onlyAir Shutter Adjustment Guidelines Flame Appearance & SootingElectronic Pilot Assembly Wiring Diagrams Warranty Replacement PartsAccessory Components Product Reference InformationSquare Clean Face Panel KitsArch Design Arch Pane Louvers KitsForced Air Kit Screen Heat Guard KitArch Door Kits Door Frame KitsTo Turn OFF GAS to Appliance What to do if YOU Smell GASLighting Instructions SwitchWhat to do if YOU Smell GAS Close lower control compartment doorMaintenance Task Accomplishing Person Procedure Maintenance ScheduleWhile HOT Operation, if the standard burner TroubleshootingSymptom Possible Causes Corrective Action PositionTroubleshooting Procedure Electronic Ignition System Part/Cat Qty Description Where Used Replacement Parts MPD35STDescription Where Used 20 P/N 875,025M REV. NC 04/2005

MPD35ST-NE, MPD35ST-PM, MPD35ST-NM specifications

The Lennox Hearth MPD35ST series, which includes the MPD35ST-NM, MPD35ST-PM, and MPD35ST-NE models, is designed for homeowners seeking superior heating solutions with aesthetic appeal. These multi-position direct vent gas fireplaces combine efficiency with advanced technology, ensuring that both performance and style are prioritized in any living space.

One of the standout features of the MPD35ST series is its innovative Direct Vent technology. This system draws air from the outside for combustion, eliminating the need for indoor air and thereby reducing energy consumption and improving indoor air quality. This feature not only enhances efficiency but also provides a safe and comfortable environment for your home.

The MPD35ST fireplaces come with a variety of design options to suit different decor styles. With a variety of front options, including sleek and modern designs or classic and rustic looks, homeowners can customize their fireplace to match their aesthetic preferences. The 'No Media' (NM) style offers a clean and minimalist contemporary design, while the 'Panel Media' (PM) and 'Enhanced Media' (NE) styles feature options for adding decorative media, such as pebbles or logs, that enhance the visual ambiance of the fire.

These units also incorporate advanced heating technologies, featuring high-efficiency burners that produce significant heat output with minimal energy consumption. With adjustable flame settings, users can control the intensity of the heat while enjoying the mesmerizing flicker of the flames. This flexibility allows homeowners to create a cozy environment tailored to their comfort needs.

In addition, the Lennox MPD35ST series is designed with user-friendly controls that simplify operation. Integrated remote controls allow for easy adjustment of the temperature and flame settings from the comfort of your seat. Safety is a paramount consideration; these fireplaces are equipped with built-in safety shut-off systems that ensure worry-free operation.

Furthermore, the construction of the MPD35ST series focuses on durability and longevity. Made from high-quality materials, these fireplaces are built to withstand the test of time, providing both reliable performance and an attractive focal point in any room.

In summary, the Lennox Hearth MPD35ST-NM, MPD35ST-PM, and MPD35ST-NE models epitomize modern fireplace design. With their energy-efficient technologies, customizable aesthetic options, and user-friendly features, they are an excellent choice for homeowners looking to enhance their living spaces with both comfort and style.
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