Lennox MERIT MLDVT-30NM Installation Instructions Manual Download Page 1

INSTALLATION INSTRUC

TIONS

Please read and understand these instructions  

before starting installation.

INSTALLER: Leave this manual with the appliance. 

CONSUMER: Retain this manual for future reference.
INSTALLATEUR : Laissez cette notice avec l’appareil. 

CONSOMMATEUR : Conservez cette notice pour 

consultation ultérieure.

AVERTISSEMENT : Assurez-vous de bien suivre les

instructions données dans cette notice pour réduire au

minimum le risque d’incindie ou d’explosion ou pour

éviter tout dommage matériel, toute blessure ou la mort.   

 

 

 

 

 

WARNING: If the information in these instructions

is not followed exactly, a fire or explosion may

result, causing property damage, personal injury,

or death.   

WARNING /AVERTISSEMENT/AVISO

•  HOT GLASS WILL CAUSE 

  BURNS. 

• DO NOT TOUCH GLASS 

  UNTIL COOLED.

• NEVER ALLOW CHILDREN 

  TO TOUCH GLASS.

 

•  UNE SURFACE VITRÉE CHAUDE 

  PEUT CAUSER DES BRÛLURES. 

• LAISSER REFROIDIR LA SURFACE 

  VITRÉE AVANT D'Y TOUCHER. 

• NE PERMETTEZ JAMAIS À UN ENFANT 

  DE TOUCHER LA SURFACE VITRÉE.

•  EL VIDRIO CALIENTE 

  CAUSARÁ QUEMADURAS. 

• USTED DEBE NUNCA 

  TOCAR EL VIDRIO CALIENTE. 

• LOS NIÑOS DEBEN NUNCA 

  TOCAR EL VIDRIO.

- Do not store or use gasoline or other flammable

  vapors and liquids in the vicinity of this or any other

 appliance. 
- WHAT TO DO IF YOU SMELL GAS:

  • Do not try to light any appliance.

  • Do not touch any electrical switch; do not use any

    phone in your building.

  • Immediately call your gas supplier from a

  neighbor’s phone. Follow the gas supplier’s

  instructions.

  • If you cannot reach your gas supplier, call the fire

  department.
- Installation and service must be performed by a

  qualified installer, service agency or the gas supplier.

- Ne pas entreposer ni utilizer d’essence ni d’autres vapeurs

  ou liquides inflammables dans le voisinage de cet appareil

  ou de tout autre appareil. 
- QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :

  • Ne pas tenter d’allumer d’appareil.

  • Ne touchez à aucan interrupteur. Ne pas vous servir des

    téléphones se trouvant dans le bâtiment où vous trouvez.

  • Appelez immédiatement votre fournisseur de gaz depuis

    un voisin. Suivez les instructions du fournisseur.

  • Si vous ne pouvez rejoindre le fournisseur de gaz,

    appelez le service des incindies.
- L’installation et l’entretien doivent être assurés par un

  installateur ou un service d’entretien qualifié ou par le

  fournisseur de gaz.

P/N 506015-10   Rev. A   03/2013 

This manual is one of a set of two supporting this product.  

Refer to P/N 506017-09 for Care and Operation Instructions.
Ce manuel est disponible en francais, simplement  

en faire la demande. Numéro de la pièce 506223-56.

This appliance may be installed in an aftermarket permanently located, manufactured home (USA only) or mobile 

home, where not prohibited by local codes. This appliance is only for use with the type of gas indicated on the 

rating plate. This appliance is not convertible for use with other gases, unless a certified kit is used.

Report No. 100326540PRT-001

ELECTRONIC:

MILLIVOLT:

MLDVT Direct-Vent 

Gas Fireplaces

MLDVT30NE-2 

MLDVT35NE-2 

MLDVT40NE-2 

MLDVT45NE-2

MLDVT-30PM 

MLDVT-35PM 

MLDVT-35PM-FB 

MLDVT-40PM 

MLDVT-45PM

MLDVT-30NM 

MLDVT-35NM 

MLDVT-35NM-FB 

MLDVT-40NM 

MLDVT-40NM-FB 

MLDVT-45NM

MODELS

Summary of Contents for MERIT MLDVT-30NM

Page 1: ...not reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier Ne pas entreposer ni utilizer d essence ni d...

Page 2: ...vide backup power for appliance operation excluding optional blower These vented gas fireplace heaters are sealed combustion air circulating gas fireplaces designed for residential applications Approv...

Page 3: ...done by a qualified service person The appliance should be inspected before use and at least annually by a professional service person More frequent cleaning may be required due to excessive lint fro...

Page 4: ...equal to or less than 1 2 psi 3 5 kPa Orifice Sizes Sea Level to High Altitude These appliances are tested and approved for installation at elevations of 0 4500 ft 0 1372 m above sea level using the s...

Page 5: ...l the wall on the other side of the unit must not extend beyond the front edge of the unit The location should also be free of electrical plumbing or other heating air conditioning ducting These direc...

Page 6: ...rmination Clearances 12 X Roof Pitch is X 12 2 FT MIN 2 FT MIN Lowest Discharge Opening H H MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING OF VENT TERMINATION HEIGHTS FOR VENTS ABOVE FLAT OR SLO...

Page 7: ...2 in 50 8 mm minimum SV4 5HT 2 6 in 152 mm minimum SV4 5HTSS 2 in 50 8 mm minimum SV4 5HT 2 6 in 152 mm minimum SV4 5HTSS H Clearance to each inside of center line extended above meter regulator asse...

Page 8: ...ntel MINIMUM CLEARANCE TO COMBUSTIBLES The appliance is approved with zero clearance to combustible materials on all sides Table 7 with the following exception When the unit is installed with one side...

Page 9: ...nner pair for 5 8 in materials Headers may be in direct contact with the appliance top standoff spacers when they are bent up vertically maintaining the 3 in clearance to the fireplace top but must no...

Page 10: ...22 1022 1111 406 MLDVT 45 in 45 1 4 40 1 4 43 3 4 16 mm 1149 1022 1111 406 Based on CSA P 4 1 09 Note Diagrams illustrations and photographs are not to scale Consult installation instructions Product...

Page 11: ...e center of the vertical run Cut and or frame an opening 10 1 2 x 10 1 2 in 267 x 267 mm inside dimensions about this center mark Figure 14 Route the Gas Line Route a 1 2 in 13 mm gas line to the left...

Page 12: ...supersede local codes in any way Install venting according to local codes these instructions the current National Fuel Gas Code ANSI Z223 1 in the USA or the current standards of CAN CSA B149 1 in Ca...

Page 13: ...0 2 2 97 5 8 125 1 0 0 0 2 3 103 5 8 625 0 0 0 3 0 3 108 9 1 0 0 3 0 4 117 9 75 1 0 5 0 0 6 118 5 9 875 1 1 0 3 0 5 126 10 5 0 0 1 3 0 4 130 5 10 875 1 0 1 3 0 5 135 11 25 0 0 6 0 0 6 139 5 11 625 0 0...

Page 14: ...nclined channel end of the previously installed section adjusting the radial alignment until the four locking dimples are aligned with the inlets of the four incline channels of the previous section P...

Page 15: ...the vent sections to the height as shown in Vertical Vent Termination Clearances on Page 6 The SV4 5CGV 1 vertical termination Figure 19 installs in the exact same fashion as any other Secure Vent se...

Page 16: ...joined together Vertical Vent Tables and Figures NOTE Secure Vent rigid vent pipe is shown in the figures Secure Flex flexible vent pipe may also be used NOTE It is very important that the horizontal...

Page 17: ...s 5 1 524 Elbow Only 5 1 524 1 0 305 10 3 048 2 0 610 15 4 572 3 0 914 20 6 096 4 1 219 H H1 20 ft 6 1 m maximum V V1 H H1 60 ft 18 3 m maximum Install the U shaped vent restrictor in any vent run wit...

Page 18: ...ver the inclined channel end of the previously installed section adjusting the radial alignment until the four locking dimples are aligned with the inlets of the four incline channels of the previous...

Page 19: ...4 5RCH provided with the termination to the vent section or telescoping vent section elbow or appliance collar as shown in Figure 23 in the same manner as any SV4 5 vent component Step 5 12 Install Fi...

Page 20: ...of V vertical you are allowed 5 ft of H horizontal run up to a maximum horizontal run of 20 ft Horizontal Vent Tables and Figures NOTE Secure Vent components rigid vent pipe and terminal are shown in...

Page 21: ...al run up to a maximum horizontal run of 20 ft An elbow is acceptable as 1 foot of vertical rise except where an elbow is the only vertical component in the system Table 20 Table 23 Top Vent Three 90...

Page 22: ...cure the flexible vent to the adaptor outer collar approximately 3 4 in from the end of the flex f Install three 3 screws 120 apart through the flexible vent pipe and into the adaptor collar just belo...

Page 23: ...D BATTERY HOLDER DFC WIRE HARNESS SPARK WIRE CABLE PILOT GROUND WIRE PILOT SENSOR CABLE HOOD IGNITER ROD FLAME SENSOR PILOT TUBE OPTIONAL CPI SWITCH OFF O INTERMITTENT PILOT MODE ON STANDING PILOT MOD...

Page 24: ...ng the gas supply The flex line method is acceptable in the U S however Canadian requirements vary depending on locality Installation must be in compliance with local codes These appliances are equipp...

Page 25: ...d in the Care and Operation Instructions For piezo igniter location on millivolt appliances see Figure 30 NOTE Lighting instructions may be found on the tags attached to a cable in the control compart...

Page 26: ...is necessary Ensure that the large burner slots remain uncovered by the ember material Position the embers on the small holes of the ember bed area NOTE This appliance is provided with enough glowing...

Page 27: ...n the order shown Position the rear log on the brackets at the rear of the firebox with the log s notches directly over the brackets Proper log and twig placement is critical to encourage outstanding...

Page 28: ...be placed in the order shown Position the rear log on the brackets at the rear of the firebox with the log s notches directly over the brackets Proper log and twig placement is critical to encourage o...

Page 29: ...ok the top flange of the glass door over the top of the firebox frame Let the bottom of the glass door swing gently in towards the fireplace ensuring that the gasket seats evenly as the glass door dra...

Page 30: ...lame appearance 1 Move the adjustment rod down to decrease air flow and up to increase it rod located in the lower control area Position the air shutter to the factory setting as shown in Table 28 2 L...

Page 31: ...wall NOTE See Cold Climate Insulation on Page 4 and Vent Termination Clearances on Page 6 Install the Hood All models must have a hood installed prior to operation Install the hood by sliding it into...

Page 32: ...ter Figure C Choose the language primarily spoken in the home If unknown affix the English language label 3 If you are unable to locate the labels please call Lennox Hearth Products or your nearest Le...

Page 33: ...Collar 6 per box H6183 SV4 5HF5 Firestop Spacer 5 in rigid H6184 SF4 5HF5 Firestop Spacer 5 in flex H2246 SV4 5HF 10 Firestop Spacer Horizontal rigid 3 1 1 spacing 10 Pack H2247 SV4 5VF 10 Firestop S...

Page 34: ...llar assembly roof flashing and storm collar ref Instruction P N 750052M 91L66 SFGC4 6 Gear Clamp 4 5 in 114 mm for flex 6 pack 91L67 SFGC7 6 Gear Clamp 7 5 in 190 5 mm for flex 6 pack H7748 H7748 36...

Page 35: ...on Kit part numbers are listed here and the following steps detail the conversion procedure Refer to the instructions provided with the conversion kit when performing any gas conversion GAS CONVERSION...

Page 36: ...the one provided with the kit Exercise extreme care to prevent damage to or breakage of the igniter assembly Figure 42 Millivolt Pilot Pilot Orifice Installing Gas Conversion Kits WARNING The gas supp...

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