Lennox Hearth MPD-33 Series Pilot for Honeywell Millivolt Gas Valve, Shown on the tab

Page 31

b. Attach manometer to the manifold side pressure test fitting and verify manifold pres- sure reads 3.5 inches water column (0.87 kPa) for natural gas, and 10.0 inches water column (2.49 kPa) for propane gas.

c. Convert the pilot orifice as follows (see Figures 62, 63 and 64 ):

Note - Use extra care not to engage the orifice strip with the 7/16" open end wrench (contact- ing the orifice strip could cause strip distortion rendering the pilot inoperative). Also avoid wrench contact to any of the other pilot parts.

Use a 7/16" open end wrench and turn the pilot hex fitting counter-clockwise 1/4 turn. (See

Figure 62).

Note - The orifice strip tab may be randomly located on any side of the hex fitting.

d. Push the orifice strip tab all the way against

the hex fitting to align the appropriate gas type

orifice (see Figures 63 and 64). The type of

gas for which the pilot is set, is, the gas type

Pilot for Honeywell Millivolt Gas Valve

(Loosening of Hex Fitting For Orifice Strip Tab Positioning)

Hood

Hood Alignment

7/16 in. Open End Wrench

 

Orifice Strip Tab

 

Take Care Not to Contact the Orifice Strip Tab

Figure 62

with the Hex Fitting Wrench - Distortion of the Tab

May Render the Pilot Inoperative.

 

 

 

 

 

Pilot for Honeywell Millivolt Gas Valve

 

Orifice Strip Tab Position Identification

 

For LP/Propane and Natural Gas

shown on the tab.

e. Retighten, clockwise, the pilot hex fitting

until the pilot hood aligns with the thermo-

couple and thermopile as indicated by the

arrows shown in Figure 62.

LP/Propane Gas Position -

1/16 in. Hole, LP and

Red Color shown on tab

L

P

Natural Gas Position -

NAT shown on tab

NAT

Figure 63

Top View of Hex Fitting and Orifice Strip Tab

 

 

 

 

 

 

Pilot for Honeywell Millivolt Gas Valve

 

Orifice Strip Tab Positioning

 

Pilot Hood Position After

 

Loosening Hex Fitting 1/4 Turn

 

Orifice Strip Tab

 

Push Tab to Set

 

Gas Type Usage

 

Note - Orifice Strip Tab May

 

Be Randomly Located On Any

Figure 64

Side Of The Hex Fitting

 

 

 

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

31

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Image 31
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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 Other heating/air conditioning ducting Typical LocationsLocation Appliance and Vent ClearancesRoof Pitch Feet Typical Installation SequenceVent Termination Clearances Vertical Vent Termination ClearancesFraming Detailed Installation StepsRouting GAS Line Inches 30cm Canadian Installation US InstallationMeter/regulator assembly = Clearance to service regulator vent outlet Feet 91cm45 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 33 1/8 30 1/8 27 1/2 19 5/8 21 1/2 10 3/4 13/16 11/32 Top ViewFront View Right Side View MassachusettsSelect Venting System Horizontal or Vertical Installation of Vent RestrictorVent Restrictor Installation Rear Vent New York City, NYSV4.5SC Vertical Straight InstallationVent Section Length Chart SV4.5FA orVent / Appliance Collar Connection Vertical Offset Installation10-1/2 17-3/4 267 mm 451 mm Framing Dimensions for Roof Pitch12/12 10-1/2 267 mm 305 mmFeet Vertical Vent FIGURES/TABLESTable a Table BCeiling Table DCeiling Firestop/Spacer Wall SV4.5VF SV4.5HFSupport the vertical run sections See Section E on Install firestop/spacer at ceilingPlan the vent run Frame exterior wall openingSV4.5RCH Install the desired terminationFor the last step , from outside the exterior Inside the inner until the termination seatsTable G Exterior Wall ThicknessInches mm Table FTable H Horizontal Vent FIGURES/TABLESH1H Table L Table KCeiling Pull and extend the outer flexible vent pipe Install the Outer Flex PipeInstall Firestop/Spacers at ceilings and walls Pull and extend the inner flexible vent pipeElectronic Wiring See or Field WiringWiring Optional Forced AIR Blower KIT SIT and Honeywell Millivolt WiringPropane applications Connecting GAS LineUse an open flame to check for leaks Checking Appliance Operation Installing the Glass DoorSIT Gas Valve Honeywell Piezo Ignitor Electronic Appliance CheckoutWall Details Burner Adjustments Flame Appearance and sootingHood Installation Finishing RequirementsTOP Cold Climate InsulationMantel Clearances Inches mmSupport Plate Installation AccessoriesCat.No. Model No. Description Cat.No Model No DescriptionModel Description Cat Model DescriptionCanada GAS Conversion KitsKits Millivolt Honeywell SystemsMillivolt SIT Systems Orifice Strip Tab Positioning Pilot for Honeywell Millivolt Gas ValveShown on the tab Arrows shown in FigureIgnitor 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.
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