Lennox Hearth 2-MP53-VDLPM Pull and extend the inner flexible vent pipe, Route Flex Vent

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VERTICAL OR HORIZONTAL VENTING USING SECURE FLEX KITS AND COMPONENTS

Secure Flex venting kits and components may be used in any venting application where rigid Secure Vent (SV4.5) direct vent components can be used. All restrictions, clearances and allowances that pertain to the rigid piping apply to the flexible venting. Secure Flex kits may not be modified; also, under no circumstances may separate sections of flex pipe be joined together. Secure Flex kits may be added to the end of a vent run made up of rigid Secure Vent (SV4.5) vent sections provided that doing so does not violate any of the venting length, height, routing, horizontal to vertical ratio re- quirements or clearance considerations de- tailed in this manual.

Secure Flex kits come with an included adapter that can be fitted to the appliance collar or the inclined channel end of the last Secure Vent (SV4.5) vent section in a rigid system in the exact same fashion as any other Secure Vent section. Align the dimpled end of the adapter over the previously installed section or appli- ance collar, adjusting the radial alignment until the four locking dimples of the adapter are aligned with the inlets of the four incline chan- nels of the last vent section or collar. Push on the adapter until it fully engages, then twist the adapter clockwise running the dimples down and along the incline channels until they seat at the end of the channels.

Attach the flexible vent to the adapter as follows (also see Figure 34 ):

A. Install the Inner Flex Pipe -

1.Install the small gear clamp loosely around the inner flexible vent pipe, push it back out of the way.

2.Apply a bead of Mill-Pac Black (700° F) high temperature sealant - Catalog No. 10K81) to the inner adapter collar, approxi- mately 1/2 inch from the end.

3.Pull and extend the inner flexible vent pipe.

4.Slide the inner flex pipe over the adapter collar. Ensure the flexible vent pipe completely engages the adapter collar to a distance of 1³⁄₄ inches from the end, and that it is free from damage or tears.

5.Slide the gear clamp down and tighten it fully to secure the flexible vent to the adapter inner collar approximately 3/4 inch from the end of the flex.

6.Install three screws 120 degrees apart through the flexible vent pipe and into the adapter collar just below the gear clamp to provide additional security to the connection.

B. Install the Outer Flex Pipe -

1.Install the large gear clamp loosely around the outer flexible vent pipe, push it back out of the way.

NOTE: OUTER PIPE IS PULLED AWAY TO

SHOW THE DETAIL OF THE INNER PIPE

Apply ONLY MIL-PAC BLACK HIGH TEMPERATURE SEALANT (Catalog No. 10K81) to the outside surface of both collars of the adapter (be especially careful to fill the grooves of the outer collar to be covered by the flexible pipe) and slide flexible pipe over inner and outer adapter collars.

1-3/4 in. (44 mm) Flexible Pipe and

Adapter Outer

Collar Overlap

Adapter

(SV4.5RF)

Attach Adapter to Appliance

Collar, or Secure Vent Sections

Figure 34

FLEX VENT

SECURING SCREW

(3 PLACES EQUIDISTANT JUST BELOW GEAR CLAMP)

GEAR

CLAMPS

1-3/4 in. (44 mm) Flexible Pipe and Adapter Inner Collar Overlap

SECURING SCREW

(3 PLACES EQUIDISTANT

JUST BELOW GEAR CLAMP)

2.Apply a bead of Mill-Pac Black (700° F) high temperature sealant - Catalog No. 10K81) to the outer adapter collar; to the grooves of the collar which extend approximately 1 inch from the end and to the flat surface, approximately 1- 3/8 inches from the end.

3.Pull and extend the outer flexible vent pipe.

4.Slide the outer flex pipe over the adapter collar. Ensure the flexible vent pipe com- pletely engages the adapter collar to a dis- tance of 1-3/4 inches from the end, and that it is free from damage or tears.

5.Slide the gear clamp down and tighten it fully to secure the flexible vent to the adapter outer collar approximately 3/4 inch from the end of the flex.

6.Install three screws 120 degrees apart through the flexible vent pipe and into the adapter collar just below the gear clamp to provide additional security to the connection.

C. Route Flex Vent -

Ensure that the flex vent is properly routed to provide the required clearance. Do Not allow the flexible vent to bend in a radius tighter than 5" (127 mm). Refer to Figure 35. Support horizontal sections of flex with metal straps at 2 foot (0.61 m) intervals.

D. Install Firestop/Spacers at ceilings and walls - When Secure Flex penetrates a wall or ceil- ing, a firestop/spacer is required: use SV4.5 (Secure Vent), SF4.5 (Secure Flex) firestop/ spacer anytime vent pipe passes through a combustible floor or ceiling.

SV4.5HF (Secure Vent) or SF4.5HF (Secure Flex) must be used anytime vent pipe passes through a combustible wall. For the MPLDV35/40/45 with a center line lower than 48" (1219 mm) above the fireplace top wrap- per surface use SV4.5HF5 or SV4.5HF5. In all cases the firestop/spacer provided with the termination may be used with the termina- tion, frame to 5" clearance where applicable.

See the appropriate sections and figures shown throughout the venting section for their installation requirements.

Flexible Vent Section

5" (127 mm)

Radius Minimum

Figure 35

E. Attach Flex Vent to Termination - Secure Flex components can be purchased separately and attached to bulk lengths of Secure Flex flexible tubing cut to size at the job site. Secure the flexible vent to the Secure Flex terminations in the same manner (see Figure 34) as it was attached to the adapter.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

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Contents MPLDV-35NM-2 OTL Report No -F-47-5Table of Contents All Models Millivolt And Electronic ModelsModel Orifice size Nat PropLocation Typical LocationsModel No Shelf Height inches mm Top Vent ApplicationAppliance and Vent Clearances Vertical Vent Termination ClearancesVent Termination Clearances Horizontal Vent Termination ClearancesDetailed Installation Steps Typical Installation SequenceRouting GAS Line Horizontal Vent Termination ClearancesMeter/regulator assembly Canadian Installation US Installation= Clearance to service regulator vent outlet Feet 91cm Inches 30cm903 1035 419 965 Model No1030 1162 419 1092 FramingModel No Install the Vent System These fireplaces must be vented directly to the outsideVertical Termination Systems Roof Vent Section Length Chart 10 1/2 Min 267 mm Vent / 45 Degree Starter Elbow ConnectionConnection 10-1/2 267 mm Framing Dimensions for Roof Pitch12/12 10-1/2Support Vertical Vent FIGURES/TABLESBracket Ceiling Firestop/Spacer SV4.5VF Detail ViewPlan the vent run Horizontal Outside Wall Termination SystemInstall firestop/spacer at ceiling Typical Horizontal Vent InstallationFrame exterior wall opening Four incline channels on the collar refer to onInstall the desired termination Install Firestop/Spacer at exterior wallMm as shown in Figure Slide the collars of the termination ontoExterior Wall Thickness Horizontal Vent FIGURES/TABLESConnection Directly AT Appliance Connection not Directly AT ApplianceWall Wall Firestop/SpacerCeiling Firestop/Spacer SV4.5VF WallPull and extend the inner flexible vent pipe Install the Outer Flex PipePull and extend the outer flexible vent pipe Route Flex VentMillivolt Wiring See Figure Field WiringElectronic Wiring See Figure After the wiring is complete, replace the cover plateConnecting GAS Line Installing the Glass Door Installing the Glass Door and Optional HoodING Embers and Volcanic Stones MillivoltBurner Adjustment Burner AdjustmentsFinishing Requirements Wall DetailsInstallation Accessories Cold Climate InsulationMantel Clearances Cat. No. Model No. Description Cat.2 Installation Code GAS Conversion KitsMillivolt Appliances Model No Orifice size Natural Pilot Orifice Electronic Appliances Dexen Electronic ValvesPage Page West Taft Avenue Orange, CA 850,043M REV. F 09/2008
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