Lennox Hearth MPD-40 Series Burner Adjustments Flame Appearance and sooting, Hood Installation

Page 25

WARNING: HANDLE THIS GLASS WITH EXTREME CARE! THE GLASS PANEL IS SUSCEPTIBLE TO DAMAGE — DO NOT SCRATCH WHILE HANDLING OR WHILE RE-INSTALLING THE GLASS DOOR FRAME.

WARNING: NEVER OPERATE THE APPLI- ANCE WITHOUT THE FRONT GLASS EN- CLOSURE PANEL IN PLACE AND SECURE.

Step 10. BURNER ADJUSTMENTS

Flame Appearance and sooting

Proper flame appearance is a matter of taste. Gen- erally, most people prefer the warm glow of a yellow to orange flame. Appliances operated with air shut- teropeningsthataretoolargewillexhibitflamesthat are blue and transparent. These weak, blue and transparent flames are termed anemic. If the air shutter opening is too small sooting may develop.

Sooting is indicated by black puffs developing at the tips of very long orange flames. Sooting results in black deposits forming on the logs, appliance inside surfaces and on exterior surfaces adjacent to the vent termination. Sooting is caused by incomplete combustion in the flames and lack of combustion air entering the air shutter opening. To achieve a warm yellow to orange flame with an orange body that does not soot, the shutter open- ing must be adjusted between these two extremes.

No smoke or soot should be present. Reposi- tion the logs if flames impinge on any of them. If the logs are properly positioned and sooting conditions exist, the air shutter opening on the main burner tube should be adjusted. Normally, the more offsets in the vent system, the greater the need for the air shutter to be opened further.

WARNING: AIR SHUTTER ADJUSTMENT SHOULD ONLY BE PERFORMED BY A QUALIFIED PROFESSIONAL SERVICE TECHNICIAN.

IMPORTANT: ENSURE THAT THE FRONT GLASS PANEL IS IN PLACE AND SEALED DURING ADJUSTMENT.

Burner Adjustment

CAUTION: THE ADJUSTMENT ROD AND NEARBY APPLIANCE SURFACES ARE HOT. EXERCISE CAUTION TO AVOID INJURY WHILE ADJUSTING FLAME APPEARANCE.

To adjust the flame, move the adjustment rod (located in the lower control area) up or down to increase or reduce the air shutter opening, respectively. Initially, always position the air shutter to the factory setting (the minimum air opening position) as shown in Figure 54.

This can be done by pulling the adjustment rod all the way down. Allow the burner to operate for at least 15 minutes. Observe the flame continuously. If it appears weak or sooty as previously described, adjust the air shutter by pushing or pulling on the adjustment rod until the flame appearance is as desired.

 

Adjusting Set Screw

 

 

Adjustment Rod Up

 

 

(Fully Open Position)

Burner Tube

 

 

Air Shutter

 

 

Adjustment Rod Down

 

(minimum air

 

 

opening position)

 

 

 

FACTORY AIR

Models

Gas

SHUTTER

Type

SETTING

 

 

 

inches (mm)

MPDT-3328

Nat.

1/32 (O.8)

Prop.

3/16 (4.76)

 

MPDR-3328

Nat.

1/32 (O.8)

Prop.

3/16 (4.76)

 

MPD-3530

Nat.

1/32 (O.8)

Prop.

3/16 (4.76)

 

MPD-4035

Nat.

1/8 (3.2)

Prop.

1/2 (13)

 

MPD-4540

Nat.

1/8 (3.2)

Prop.

1/2 (13)

 

Figure 54

The adjustment rod and associated adjustable air shutter is patented technology. Flame ad- justments can be made quickly and accurately to taste without the need of disassembling the appliance and waiting for 30 minutes after each adjustment.

Note: If the flame still appears anemic with the air shutter closed all the way against the stop (usually a result of lengthy vertical runs), turn the appliance off, turn the gas supply off, wait for the parts to cool, remove the glass door and logs to access the air shutter. The shutter is prevented from actually closing all the way by an adjustment set screw (see Figure 54). Remove this screw using a 1/4 inch nut driver. Reinstall the logs and glass door, turn the gas back on and then restart the appliance. After 30 minutes, reobserve the flame. Adjust the air shutter as previously described.

When satisfied that the appliance operates properly, proceed to finish the installation. Leave the control knob in the ON position and the remote switch OFF. Close the lower control compartment door.

Step 11. HOOD INSTALLATION

All of these appliances must have hoods installed prior to operating.

On all clean face units, slide the hood into the slots on the lower edge of the radiant panel

(Figure 55 ).

On louvered face units, slide the hood into the slots on the lower edge of the cabinet top

(Figure 56 ).

FINISHING REQUIREMENTS

Wall Details

Complete finished interior wall. To install the appliance facing flush with the finished wall, position framework to accommodate the thick- ness of the finished wall (see Figure 55, and

Figure 56 ).

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

25

Page 24 Page 26
Image 25
Page 24 Page 26
Contents MPD-3530CPE MPD4540CNE-B OTL Report No -F-13-4Table of Contents Electronic Models Input of millivolt models is shown in the following tableAll Models Location Typical LocationsAppliance and Vent Clearances Other heating/air conditioning ductingVent Termination Clearances Typical Installation SequenceVertical Vent Termination Clearances Roof Pitch FeetFraming Detailed Installation StepsRouting GAS Line Meter/regulator assembly Canadian Installation US Installation= Clearance to service regulator vent outlet Feet 91cm Inches 30cm45 1/4 40 1/4 26 11/16 44 3/4 33 1/4 37 3/4 12 7/8 845 959 327Framing with Square Horizontal Termination SV4.5HT-2 Front View Right Side View Top ViewMassachusetts 33 1/8 30 1/8 27 1/2 19 5/8 21 1/2 10 3/4 13/16 11/32Vent Restrictor Installation Rear Vent Installation of Vent RestrictorNew York City, NY Select Venting System Horizontal or VerticalVent Section Length Chart Vertical Straight InstallationSV4.5FA or SV4.5SCVent / Appliance Collar Connection Vertical Offset Installation12/12 Framing Dimensions for Roof Pitch10-1/2 267 mm 305 mm 10-1/2 17-3/4 267 mm 451 mmTable a Vertical Vent FIGURES/TABLESTable B FeetCeiling Firestop/Spacer Wall SV4.5VF Table DSV4.5HF CeilingPlan the vent run Install firestop/spacer at ceilingFrame exterior wall opening Support the vertical run sections See Section E onFor the last step , from outside the exterior Install the desired terminationInside the inner until the termination seats SV4.5RCHInches mm Exterior Wall ThicknessTable F Table GTable H Horizontal Vent FIGURES/TABLESH1H Table L Table KCeiling Install Firestop/Spacers at ceilings and walls Install the Outer Flex PipePull and extend the inner flexible vent pipe Pull and extend the outer flexible vent pipeWiring Optional Forced AIR Blower KIT Field WiringSIT and Honeywell Millivolt Wiring Electronic Wiring See orPropane applications Connecting GAS LineUse an open flame to check for leaks SIT Gas Valve Honeywell Piezo Ignitor Installing the Glass DoorElectronic Appliance Checkout Checking Appliance OperationHood Installation Burner Adjustments Flame Appearance and sootingFinishing Requirements Wall DetailsMantel Clearances Cold Climate InsulationInches mm TOPCat.No. Model No. Description Installation AccessoriesCat.No Model No Description Support PlateModel Description Cat Model DescriptionCanada GAS Conversion KitsKits Millivolt Honeywell SystemsMillivolt SIT Systems Shown on the tab Pilot for Honeywell Millivolt Gas ValveArrows shown in Figure Orifice Strip Tab PositioningIgnitor Assembly Pilot AssemblyFlare Nut Clip

MPD-35 Series, MPD-45 Series, MPD-33 Series, MPD-40 Series specifications

The Lennox Hearth MPD-33, MPD-40, MPD-45, and MPD-35 Series are sophisticated and innovative products designed for both aesthetic appeal and functional heating efficiency. These multi-sided gas fireplaces are engineered to bring warmth and style to any space, making them a popular choice for homeowners looking to enhance their living environment.

One of the standout features of the MPD Series is their versatile design. Each model is available in different sizes with stylish options, catering to various room dimensions and decor styles. The MPD-33, MPD-40, and MPD-45 models provide flexibility in installation, while the MPD-35 offers extra depth for a more pronounced fire presence, making them suitable for both contemporary and traditional interiors.

A key characteristic of the Lennox Hearth MPD Series is its high-efficiency operation. These fireplaces are designed to maximize heat output while minimizing fuel consumption, resulting in lower energy bills. The innovative burner system produces a realistic flame effect that can be adjusted to create the perfect ambiance for any occasion. The use of advanced technology ensures that the heat generated is evenly distributed, enhancing overall comfort.

Safety is paramount in the design of the MPD Series. Each model is equipped with a state-of-the-art safety shut-off system that activates if the flame goes out, ensuring peace of mind for users. Additionally, the glass front not only provides a clear view of the flames but is designed to stay cool to the touch, making it safe for families with children and pets.

The efficiency of these models is further complemented by an optional remote control feature, allowing users to adjust the flame height and thermostat settings with ease. The MPD Series is also compatible with smart home systems, providing users with added convenience.

Overall, the Lennox Hearth MPD-33, MPD-40, MPD-45, and MPD-35 Series exemplify the perfect combination of efficiency, safety, and design. Their ability to blend function with visual appeal makes them an ideal choice for creating a cozy atmosphere in any room, from living areas to bedrooms. These fireplaces stand as a testament to Lennox's commitment to quality and innovation in home heating solutions. With advanced technologies and a focus on user comfort, the MPD Series is designed to meet the needs of modern homeowners seeking reliable and stylish heating options.
Top Page Image Contents