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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

25

Figure 43

Figure 44

Burner Adjustment

Step 9.  BURNER ADJUSTMENTS

Flame Appearance and sooting

Proper flame appearance is a matter of taste.
Generally, most people prefer the warm glow of
a yellow to orange flame. Appliances operated
with air shutter openings that are too large will
exhibit flames that are blue and transparent.
These weak, blue and transparent flames are
termed anemic. If the air shutter opening is too
small sooting may develop.

Sooting is indicated by black puffs developing
at the tips of very long orange flames. Sooting
results in black deposits forming on the logs,
appliance inside surfaces and on exterior sur-
faces adjacent to the vent termination. Sooting
is caused by incomplete combustion in the
flames and lack of combustion air entering the
air shutter opening. To achieve a warm yellow
to orange flame with an orange body that does
not soot, the shutter opening must be adjusted
between these two extremes.

No smoke or soot should be present.  These
logs are designed to be involved in the fire.
Flames will impinge the top tips of the right and
left logs.

If the logs are properly positioned and sooting
conditions exist, the air shutter opening on the
main burner tube should be adjusted. Normally,
the more offsets in the vent system, the greater
the need for the air shutter to be opened further.

To adjust the flame, rotate the lever arm up or
down (rod located in the lower control area).
Position the air shutter to the factory setting as
shown in the table in 

Figure 43. Allow the

burner to operate for at least 20 minutes.

WARNING: AIR SHUTTER ADJUST-
M E N T   S H O U L D   O N L Y   B E   P E R -
FORMED BY A QUALIFIED PROFES-
SIONAL SERVICE TECHNICIAN.

IMPORTANT: ENSURE THAT THE FRONT
GLASS PANEL IS IN PLACE AND SEALED
DURING ADJUSTMENT.

CAUTION: THE AIR SHUTTER DOOR
AND NEARBY APPLIANCE SURFACES
ARE HOT. EXERCISE CAUTION TO
AVOID INJURY WHILE ADJUSTING
FLAME APPEARANCE.

FINISHING REQUIREMENTS
Wall Details

Complete finished interior wall. To install the
appliance facing flush with the finished wall,
position framework to accommodate the thick-
ness of the finished wall (

Figure 44 )

CAUTION:  DO NOT BEND THE AIR SHUTTER
ROD.  MAKE SURE THE AIR SHUTTER MOVES
WHEN THE LEVER ARM IS OPERATED.

Note:  When first operating the air shutter
adjustment lever arm observe the air shutter.
If it is not moving, open the glass, ensure the
air shutter screw is loose and adjust by hand
through a couple of cycles, to break the adhe-
sion of paint, if required.  Close door and
adjust with the lever as needed.

Observe the flame continuously. If it appears
weak or sooty as previously described, adjust
the air shutter by rotating the adjustment arm
up or down (

refer to Figure 39 ) until the flame

appearance is as desired.

The adjustment rod and associated adjustable
air shutter is patented technology. Flame ad-
justments can be made quickly and accurately
to taste without the need of disassembling the
appliance and waiting for 30 minutes after
each adjustment.

Propane models may exhibit a flame pattern
that may candle or appear stringy. If this is
problematic or persists as the appliance is
continually operated, adjust the air shutter
closed as described in the previous paragraphs.
Operate the appliance for a period of time as the
effect diminishes, ensuring that the appliance
does not develop sooty flames.

When satisfied that the appliance operates
properly, proceed to finish the installation.
Leave the control knob in the ON position and
the remote switch OFF. Close the lower control
compartment door.

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Venturi

Air Shutter Rod

Valve

Air

Adjustment

Arm

A hearth extension is not required with this
appliance. If a hearth extension is used, do not
block the lower control compartment door.
Any hearth extension used is for appearance
only and does not have to conform to standard
hearth extension installation requirements.

Combustible

Finished Wall

Materials

This Area Must
Remain Clear
of Combustible
Materials

Top of

Appliance

3-1/2" Min
(89 mm)

Spacer

Combustible

materials not

allowed

below this

point on

the face of the

appliance.

Optional Hood

Top of Door Frame

10" Min

(254 mm)

WARNING: DO NOT OPERATE APPLI-
ANCE WITH THE GLASS FRONT RE-
MOVED, CRACKED OR BROKEN.  RE-
PLACEMENT OF THE GLASS SHOULD
BE DONE BY A LICENSED OR QUALIFIED
SERVICE TECHNICIAN.

Summary of Contents for Merit Plus MPLDV-30NE

Page 1: ...nes se trouvant dans le batiment o vous vous trouvez Evacuez la pi ce le b timent ou la zone Appelez imm diatement votre fournisseur de gaz depuis un voisin Suivez les instructions du fournisseur Si v...

Page 2: ...the bottom compartment 4 One vent restrictor to be used as detailed on page 10 5 One hood and one control compartment cover and one 45 degree starter elbow are strapped to the top of the unit GENERAL...

Page 3: ...ove 4500 ft For elevations above 4500 feet 1372 meters install the unit according to the regulations of the local authorities having jurisdictionand intheUSA thelatestedition of the National Fuel Gas...

Page 4: ...m 6 2 6 1 n i 4 6 T N E V m m 4 5 2 n i 1 S E C N A R A E L C E C I V R E S T N O R F s r e t e m 9 0 t e e F 3 Shelf Height see table Do not insulate the space between the appliance and the area abo...

Page 5: ...nwealth of Massachusetts hori zontal terminations installed less than seven 7 feet above the finished grade must comply with the following additional requirements A hard wired carbon monoxide detector...

Page 6: ...b Electronic Appliances Connect 120 Vac electrical power to the appliance receptacle Step 5 page 22 Make connection to gas supply Step 6 page 23 Install the logs and glow ing embers Step7 page23 Chec...

Page 7: ...o t a l u g e r r e t e m t e e f 5 1 f o t h g i e h a n i h t i w m c 1 9 t e e f 3 y l b m e s s a r o t a l u g e r r e t e m e h t e v o b a t e e f 5 1 f o t h g i e h a n i h t i w m c 1 9 t e...

Page 8: ...1 1 8 0 7 1 7 0 2 1 2 9 4 4 5 8 Note Venting requirements for corner installations the horizontal vent length a to b must not exceed 28 inches 711 mm Inches millimeters These dimensions occur when one...

Page 9: ...1 3 5 9 4 3 5 3 1 6 8 6 7 2 0 5 1 5 2 2 9 6 5 3 V D L P M n i 2 1 0 4 2 1 7 3 8 5 0 2 8 1 9 2 4 1 5 3 4 3 4 2 8 3 2 1 4 1 7 2 m m 9 2 0 1 3 5 9 4 3 5 0 4 7 5 9 8 9 2 6 4 1 3 2 9 6 0 4 V D L P M n i 2...

Page 10: ...SYSTEMS ROOF Figures 13 17 and 23 through 25 on pages 12 14 and 15 and their associated Vertical Vent Tables illustrate the various vertical vent ing configurations that are possible for use with the...

Page 11: ...6 6 8 1 5 5 1 0 0 0 0 4 4 5 0 9 1 5 7 8 5 1 1 0 0 0 4 5 5 6 9 1 5 7 3 6 1 0 1 0 0 4 5 5 5 0 2 5 2 1 7 1 0 1 1 5 0 7 7 0 2 5 2 7 1 0 0 0 6 0 6 5 1 1 2 5 2 6 7 1 1 0 0 6 0 7 5 7 1 2 5 2 1 8 1 0 1 0 6 0...

Page 12: ...r to Figure 15 Push the vent component against the starter elbow until it fully engages then twist the component clockwise running the dimples down and along the incline channels until they seat at th...

Page 13: ...5 and SV4 5E90 elbows in the same manner as the straight vent sections The elbows feature a twist section to allow them to be routed about the center axis of their initial collar section to align with...

Page 14: ...10 15 4 572 3 0 914 20 6 096 4 1 219 V H 40 feet 12 2 m Max H 20 feet 6 096 meters Max meters 40 feet 12 2 meters Maximum Ceiling Firestop Spacer SV4 5VF When using Secure Flex use Firestop Spacer SF4...

Page 15: ...es covered in this document are fittedwithcollarshavinglockinginclinedchan nels The dimpled end of the vent components fit over the appliance collar to create the posi tive twist lock connection C Pla...

Page 16: ...ot run ratios that are smallerareacceptableallthewaydowntoator near level Use a carpenter s level to measure fromaconstantsurfaceandadjustthesupport straps as necessary It is important to maintain the...

Page 17: ...coping vent section elbow as shown in Figure 27 in the same manner as any SV4 5 vent component refer to Step F N Install Firestop Spacer at exterior wall When using the square termination install the...

Page 18: ...c s e l e T d n a t i K n o i t a n i m r e T n i 2 1 7 o t 2 A L 5 4 V S n o i t c e S 6 L 5 4 V S n o i t c e s t n e v n i 6 2 0 5 o t 9 7 2 4 3 9 1 o t 1 1 Note SV4 5VF Secure Vent SF4 5VF Secure...

Page 19: ...p Spacer SV4 5HF or SF4 5HF when using Secure Vent or Secure Flex respectively Use Firestop Spacer SV4 5HF5 or SF4 5HF5 when using Secure Vent or Secure Flex on horizontal vent runs for the MPLDV35 40...

Page 20: ...rapper surface In all cases the firestop spacer provided with the termination may be used with the termination frame to 5 clearance where applicable HORIZONTAL VENT FIGURES TABLES CONTINUED Figure 33...

Page 21: ...ex Pipe 1 Installthesmall gearclamplooselyaroundthe innerflexibleventpipe pushitbackoutoftheway 2 Apply a bead of Mill Pac Black 700 F high temperature sealant Catalog No 10K81 to the inner adapter co...

Page 22: ...the appliance junction box 2 Remove the electrical inlet cover plate from the side of the unit by removing the plate s securing screws See Figure 11 on page 9 3 Removethe coverplate sknockoutandthen f...

Page 23: ...rd pipe and tighten with wrenches from above through the firebox opening If required access the valve by removing the lower control compartment panel see Figure 39 by lifting and pulling the panel for...

Page 24: ...4 as shown in Figure 39 Refer to Figure 43 and loosen the set screw for the venturi air shutter Manually actuate the air shutter through several cycles Set the air shutter to 3 32 before placing the...

Page 25: ...R SHUTTER MOVES WHEN THE LEVER ARM IS OPERATED Note When first operating the air shutter adjustment lever arm observe the air shutter If it is not moving open the glass ensure the air shutter screw is...

Page 26: ...8 203 MANTEL 6 152 MANTEL 4 102 MANTEL 18 457 14 356 12 305 2 51 MANTEL TOP OF APPLIANCE 8 203 10 254 MANTEL CLEARANCES Inches mm 16 406 Figure 45 COLD CLIMATE INSULATION For cold climate installatio...

Page 27: ...S x e l F f o m m 4 1 9 n i 6 3 x e l F d e s s e r p m o c 8 0 L 4 9 S S 8 4 T I K F S h t i w m r e T e r a u q S l l a m S x e l F f o m m 9 1 2 1 n i 8 4 x e l F d e s s e r p m o c o N t a C o N...

Page 28: ...ONFORM MENTAUXINSTRUCTIONSDUFABRICANTET TOUTES EXIGENCES ET CODES APPLICABLES DE L AUTORIS SAVOIRLAJURIDICTION SIL INFORMATION DANS CETTE INSTRUCTION N EST PAS SUIVIE EXACTEMENT UN FEU EXPLOSION OU PR...

Page 29: ...ns do not use pipe joint compounds on flare fittings Step 10 Attach the conversion label provided in the conversion kit to the rating plate on the appliance Step 11 Turn on gas supply and test for gas...

Page 30: ...30 NOTE DIAGRAMS ILLUSTRATIONS NOT TO SCALE NOTE THIS PAGE INTENTIONALLY LEFT BLANK...

Page 31: ...NOTE DIAGRAMS ILLUSTRATIONS NOT TO SCALE 31 NOTE THIS PAGE INTENTIONALLY LEFT BLANK...

Page 32: ...0 043M REV E 06 2008 Lennox Hearth Products reserves the right to make changes at any time without notice in design materials specifications prices and also to discontinue colors styles and products C...

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