Lennox Hearth LMDV-3530-CNM Install the Vent System General Information, Cross Section

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Step 3. Install the Vent System

General Information

These instructions should be used as a guide- line and do not supersede local codes in any way. Install vent according to local codes, these instructions, the current National Fuel Gas Code (ANSI-Z223.1) in the USA or the current standards of CAN/CGA-B149.1 and -B149.2 in Canada.

Useonlyapprovedventingcomponents. See Approved Vent Components on Page 2.

These fireplaces must be vented directly to the outside.

The vent system may not service multiple appliances, and must never be connected to a flue serving a solid fuel burning appliance. The vent pipe is tested to be run inside an enclosing wall (such as a chase). There is no requirement for inspection openings in the enclosing wall at any of the joints in the vent pipe.

Preparing the Appliance Vent Collar on LMDV-

3530/4035 Series (Combined Top and Rear

Vent) Models.

Each of the unit's two vent collars are sealed with a cover plate and a seal plate and gasket. The cover, and seal plate and gasket must be removed from the vent collar being used. Refer to Figure 16 for top vent usage and Figure 17 for rear, and the following steps to prepare the appropriate collar for use.

From the vent collar being used, remove the four screws securing the vent seal plate and gasket. Remove and discard the seal plate and gasket.

When the top vent collar is being used, from inside the firebox, loosen the two screws in the keyhole slots of the cover plate and remove the remaining two cover plate securing screws. Remove and discard the cover plate. Reinstall and securely tighten all four screws.

WARNING

Failure to reinstall and securely tighten cover plate screws could result in leakage of flue products into the living space. Vent cover plate and vent seal plate must remain securely installed on unused vent collar. Failure to do so could result in leakage of flue products into living space.

When the rear vent collar is being used, from

inside the firebox, remove the two screws se- curing the lintel to the rear wall of the firebox, then remove the lintel. Remove the four cover plate securing screws.

Remove and discard the cover plate. Rein- stall and securely tighten all four cover plate screws. Re-secure the lintel to the rear wall of the firebox.

On LMDV-3530/4035 Series Models (Combined Top And Rear Vent Units) Top Vent Seal & Cover Plate Removal When Using The Top Vent

(OUTSIDE of

Gasket Vent Seal Plate

Appliance)

Cabinet Top

Securing

Screws

 

 

Top Vent

Firebox Top

 

Vent Cover Plate

Cover Plate

 

Securing Screws

(Inside of Appliance)

CROSS SECTION

Figure 16

On LMDV-3530/4035 Series Models (Combined Top And Rear Vent Units)

Rear Vent Seal & Cover Plate Removal

When Using The Rear Vent

Cover Plate

Vent Seal Plate

Securing Screws

 

Gasket

(INSIDE of

 

Appliance)

Securing

 

Rear Vent

Screws

 

Lintel

 

Lintel

Cabinet

Securing

Back

Screws

(OUTSIDE of

CROSS SECTION

Appliance)

Figure 17

Installation of Vent Restrictor

A vent restrictor may be needed with this ap- pliance, install vent restrictor (provided) in the appliance top flue outlet as shown in Figure 18 (LMDV-3328,LMDV-3530 and LMDV-4035)or rear flue outlet as shown in Figure 19 (LMDV- 3328, LMDV-3530 and LMDV-4035). It is held in place by friction, only.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Vent Restrictor Installation

(Top Vent)

A vent restrictor may be needed when vertical- ly terminating the vent system above the roof (when using the appliance top vent), install vent restrictor in the top vent of the fireplace outlet on LMDV-3530/4035 and LMDVT-3328 series models. If needed, install the restrictor orientated as shown, either from inside or out- side the unit,in the inner fireplace collar.

Restrictor

Inner

Fireplace

Collar Appliance Top

Vent Outlet

Figure 18

Vent Restrictor Installation

(Rear Vent)

A vent restrictor may be needed when horzontally terminating the vent system from the rear of the appliance (when using the appliance rear vent), install vent restrictor in the rear vent of the fire- place outlet on LMDV(R)-3328/3530/4035 series models, in any installation that has a vertical vent run in excess of three feet (0.914 meters).

If needed, install the restrictor orientated as shown, either from inside or outside the unit, in the inner fireplace collar

Inner Fireplace

Appliance Rear

Collar

Vent Outlet

 

 

Restrictor

Figure 19

Select Venting System - Horizontal or Vertical

With the appliance secured in framing, de- termine vent routing and identify the exterior termination location. The following sections describe vertical (roof) and horizontal (exterior wall) vent applications. Refer to the section relating to your installation. A list of approved venting components is shown on Pages 31 and 32.

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Contents OTL Report No -F-31-5 Vented GAS Fireplace Heaters Direct Vent Models850,029M REV. G 05/2008 Table of Contents Honeywell Millivolt SIT MillivoltMassachusetts Cold Climate InsulationLocation Massachusetts And New York City, NY Re- quirementsVent Termination Clearances Manufactured Home RequirementsVertical Vent Termination Clearances Horizontal Vent Termination ClearancesInches 30cm Canadian Installation US InstallationMeter/regulator assembly = Clearance to service regulator vent outlet Feet 91cmAdjacent to it Minimum Clearances to CombustiblesAppliance and Vent Clearances Panel or louversRouting Gas Line Detailed Installation StepsTypical Installation Sequence FramingVent Size Vertical Venting Through the Ceiling Fireplace specificationsFrom This center mark see FigurePropane Fireplace Framing specificationsSchedule Black Iron Pipe Inside Diameter Inches NaturalCross Section Install the Vent System General InformationThese fireplaces must be vented directly to the outside Effective Vent Length Vertical Straight InstallationVent Section Length Chart Vertical Termination Systems RoofAttach vent components to each other Vertical Offset InstallationIf the vent system extends more than 5 feet Vertical Vent FIGURES/TABLESPitch Ratio V to H ratio is 610 305 219 829 914 438Table B Maximum Minimum Feet Meter 524 Elbow Only 305 048 610 572 914 096 219Table D + H1 Maximum Minimum Table CMaximum Minimum Feet Meter 524 610 305 048 219 572 829 914 096 438See on Page 12 or on Typical Horizontal Vent InstallationSee on Page 9 for Min Install Firestop/Spacer at exterior wallSame manner as any SV4.5 vent component refer to Step E 914 Horizontal Vent FIGURES/TABLESTable F Maximum Feet MeterHorizontal Vent Figures / Tables 048 610 572 914 Minimum524 Elbow Only 524 305Attach Flex Vent to Termination Install the Outer Flex PipeFlexible Vent Section See Figure Field WiringWiring Optional Forced Air Blower Kit Schematic Representation Only Connecting Gas LineSIT and Honeywell Millivolt Appliance Checkout Control Compartment AccessLouver Panel Instructions Ref Checking Appliance Opera- tionCanic STONE, Glowing Embers and Logs Install VERMICULITE, VOLElectronic Appliance Checkout Shown here 1 through 6 and per the instructions on LOG SETCatalog Number H3366 Catalog Number H3365 Model LMDV-4035Air Shutter Adjustment Guidelines Installing the Glass DoorInstalling Glass Enclosure Panels Burner Adjustments Flame Appearance and sootingDrywall Bracket / Spacer Burner Air Shutter Adjustment ProcedureHood Installation Finishing Requirements Wall Details12C Cat. No Model Description12B Open Top, Chase Top Shroud Cat. NoAll compressed flex vents can be expanded up to two times Listed Secure Flex ComponentsLMDV-3328 & LMDV-3530 Models Only DescriptionH2010 H2009H2011 H2013Pilot for SIT Millivolt Gas Valve Adjusting KnobMillivolt Appliances SIT Systems SIT Millivolt Gas Valve850,029M REV. G 05/2008 West Taft Avenue Orange, CA Pilot Orifice Ignitor AssemblyElectronic Appliances Honeywell Systems Series

LMDV-3530-CNM, LMDV-35 Series, LMDVR-3328-CNE, LMDV-4035-CNE, LMDV-4035-CPM specifications

Lennox Hearth products are renowned for their quality, efficiency, and innovative technologies that optimize the home heating experience. Among the standout offerings in their lineup are the LMDV-3530-CPM, LMDVR-3328-CPM, LMDV-3530-CNE, LMDVT-3328-CPM, and LMDVR-3328-CNM models. Each of these products embodies the brand's commitment to performance and design, making them a popular choice for modern homeowners.

The LMDV-3530-CPM gas fireplace boasts a contemporary aesthetic combined with powerful heating capabilities. It features a clean face design that enhances the viewing experience while maximizing warmth in the room. The unit is equipped with advanced technology that includes multi-speed blowers for efficient air circulation, allowing users to enjoy consistent heat throughout the space. Its variable flame and heat control options ensure that homeowners can customize their ambience and comfort levels according to their preferences.

Similarly, the LMDVR-3328-CPM model is designed for versatility and efficiency. Its modern fireplace insert converts existing masonry fireplaces into high-efficiency heating systems. Featuring a sleek design, this insert incorporates innovative venting technologies that enable it to operate in diverse installation configurations, enhancing both aesthetic appeal and functionality. Homeowners can appreciate the adjustable flame and fan speed settings, which provide tailored heating solutions.

The LMDV-3530-CNE model distinguishes itself through eco-friendly features. It employs advanced combustion technology that reduces emissions without sacrificing heat output. This model stands out as an environmentally responsible option, suitable for conscious consumers who wish to reduce their carbon footprint. Its easy-to-use controls and stylish design make it a favored choice among discerning homeowners.

The LMDVT-3328-CPM continues the trend of performance and versatility. This model combines traditional charm with modern efficiency, featuring a large viewing area that allows for an inviting flame display. The unit’s heat exchanger is designed for maximum heat transfer, ensuring that warmth is efficiently distributed throughout the room.

Lastly, the LMDVR-3328-CNM model is perfect for those seeking an efficient upgrade for their traditional fireplace. With its stunning design and advanced features, including optional remote control and programmable settings, this model takes convenience to new heights.

Overall, Lennox Hearth’s suite of models combines elegance, efficiency, and innovation, ensuring that homeowners can find the perfect heating solution to complement their living spaces. Each product is engineered with state-of-the-art technologies that reflect Lennox’s dedication to quality and customer satisfaction.
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