MODELSThis appliance may be installed in an aftermarket permanently located, manufactured home (USA only) or mobile home, where not prohibited by loca
10NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
11NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
12NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Select Venting System - Horizontal or VerticalWith the appliance secured in framing, determine v
13NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.VERTICAL TERMINATION SYSTEMS (ROOF)See Figure 15 on Page 13 and Figures 23-25 on Pages 16 and
14NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Vertical (Offset) InstallationAnalyze the vent routing and determine the quantities of ven
15NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
16NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
17NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Maintain a minimum 1" (25 mm) clearance to combustibles on the vertical sections. Clear-anc
18NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Push the vent component against the previous section until it fully engages, then twist t
19NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.J. Assemble vent run to exterior wall - If not previously measured, locate the center of the ven
2TABLE OF CONTENTS Packaging ...Page 2Introduction ...Page 2General Informa
20NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Table CH Maximum V Minimum feet (meter) feet (meter)3 (0.914) Elbow OnlyTable DH Maximum V Mini
21NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.See Table 8 on Page 20 as an aid in venting component selection for a particular
22NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.HORIZONTAL VENT FIGURES / TABLES (CONTINUED)Table FH + H1 Maximum V Minimumfeet (meter) feet (m
23NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
24NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.JUNCTION BOXWGRBK120 VACBKRTRANSFORMER 3VINTERMITTENT ELECTRONIC WIRING DIAGRAMBROWNBROWNBLACKBA
25NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
26NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Length Of Pipe With Attached Shut-Off ValveFigure 40LENNOXHEARTHPRODUCTS•MERIT® SERIESDI
27NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Turn on gas supply and test for gas leaks, us-ing a gas leak test solution (also referred to as
28NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Install Tumbled River Stone (MTRS) - IMPORTANT: Refractory panels should be installed before
29NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
3 Input (BTU/HR) Manually-Modulated Gas Valves (all models)ModelsInput Rate (BTU / HR)Nat. Gas Prop. GasMLDVTCD-35 14,500 high11,500 low13,500 high10
30NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Air Shutter Adjustment Guidelines:Amount of Primary AirFlame ColorAir Shutter AdjustmentIf air s
31NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. WARNINGS• Air shutter adjustment should only be performed by a quali-fied professional serv
32NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.FINISHING REQUIREMENTS - Contemporary FacadeThis contemporary unit is uniquely suited for mid-wa
33NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Step 12. ATTACHING SAFETY-IN-OPERATION WARNINGSIt is the installers responsibility to ensure the
34NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
35NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
36NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MOD
37NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.* Standard size installed at factory** Standard size in LP conversion kit• Part /Cat. NumberLEN
LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MODELMLDVTCD-35•INSTALLATIONINSTRUCTIONSPrinted in
4NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Inlet Gas Supply Pressure (all models)Fuel # Minimum MaximumNatural Gas4.5" WC(1.12 kPa)10.5
5NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.Figure 3 - Typical LocationsNOITACILPPATNEVPOT APPLICATIONTOP VENTTNEVPOTNOITACILPPARECESSEDINSTA
6NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MODE
7NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.LENNOXHEARTHPRODUCTS•MERIT® SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MODE
8NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.5 (127) 8-1/4 (209) 14 (356) 12 (305) 19 (483)*Shelf Height(see table)Do not insulate thespace be
9NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.DETAILED INSTALLATION STEPSThe appliance is shipped with all gas controls and components installe
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