Lennox MP-360D, MP-420D Homeowner's Care And Operation Instructions Manual
HOMEOWNER’S CARE AND
OPERATION INSTRUCTIONS
®
MERIT
36" and 42" Indoor/Outdoor Wood-Burning Fireplaces
P/N 875029M Rev. B 10/2011
MODELS
PLUS SERIES
MP-42OD
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
VEUILLEZ GARDER CE MANUEL
POUR RÉFÉRENCE FUTURE.
MP-36OD
MP-36OD
The information contained in this manual applies to all model fireplaces
identified on this page. This information will help you obtain safe and
dependable service from your Lennox fireplace system. Keep this document in a safe place for future reference.
Before you start your first fire, read this Care and Operations Manual
carefully to be sure you understand your fireplace system completely.
Failure to follow these suggestions could result in hazardous operation
or fireplace malfunction, creating a serious potential for personal injury
and/or property damage.
If you have any questions regarding the safe use or operation of your
fireplace, contact your local Lennox distributor, or your contractor /
builder.
A French manual is available upon request. Order P/N 875029CF.
Ce manuel d’installation est disponible en francais, simplement en
faire la demande. Numéro de la pièce 875,029CF.
MP-42OD
US
OTL Report No.
(MP-36OD) #116-F-35-2
(MP-42OD) #116-F-37-2
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
WARNING: EXERCISE CAUTION WHEN OPERATING IF INSTALLED OUTDOORS. DO NOT BURN LARGE FIRES. ATMOSPHERIC CHANGES MAY CAUSE UNEXPECTED GUSTS OF WIND.
FLAMES AND ASHES MAY BE BLOWN OUT OF THE FIREPLACE.
KEEP THE SCREEN CURTAINS CLOSED AT ALL TIMES AFTER
FEEDING THE FIRE.
AVERTISSEMENT: EXERCISE GUARANTEE WHEN OPERATING
IF THIS APPLIANCE IS INSTALLED OUTDOORS. BROAD C
NOT BURN FIRES. ATMOSPHERIC EXCHANGES MAY CAUSES
UNEXPECTED GUSTS OF WIND. FLAMES AND ASHES MAY
BE BLOWN OUT OF THE FIREPLACE. KEEP THE SCREEN
CURTAINS CLOSED AT ALL.
1
CONGRATULATIONS!
In selecting this LENNOX Wood Burning Appliance you have chosen the finest and most
dependable fireplace to be found anywhere. Its a beautiful, prestigious alternative to a
masonry wood burning fireplace. Welcome to a Family of tens of thousands of satisfied
LENNOX Fireplace Owners.
Please carefully read and follow all of the instructions found in this manual. Please pay
special attention to the safety instructions provided in this manual. The Homeowner's
Care and Operation Instructions included here will assure that you have many years of
dependable and enjoyable service from your LENNOX product.
1.
TABLE OF CONTENTS
General Safety Precautions .................Page 2
General Information ............................Page 2
Fuels ...................................................Page 3
Gas Logs .............................................Page 3
Wood Fuel Pointers .............................Page 3
Disposal of Ashes ...............................Page 4
Softwood vs Hardwood .......................Page 4
Starting a Fire ......................................Page 4
Damper Control ...................................Page 5
Glass Door Operating Safety
Precautions and Instructions ............Page 4
Combustion Air Inlet ...........................Page 5
Maintenance Guidelines ......................Page 6
Refractories ........................................Page 8
Twice a Year Check-Up ........................Page 7
Creosote Formation and Removal .......Page 8
Troubleshooting ..................................Page 9
Warranty .............................................Page 10
Product Reference Information ...........Page 10
Accessory Components ......................Page 10
Replacement Parts ..............................Page 11
IMPORTANT! GENERAL SAFETY
PRECAUTIONS. READ AND
UNDERSTAND THESE SAFETY
RULES BEFORE YOUR FIRST FIRE.
WARNING
To avoid the risk of damaging
fireplace materials and increasing the risk of fire, do not use the
fireplace to cook or warm food.
AVERTISSEMENT
Pour éviter le risque
d’endommager les matériaux
du foyer et d’augmenter le
risque d’incendie, n’employez
pas le foyer pour faire cuire ou
réchauffer de la nourriture.
NEVER LEAVE CHILDREN UNATTENDED
WHEN THERE IS A FIRE BURNING IN
THE FIREPLACE.
2. When burning wood, use SOLID NATURAL
DRY WELL-SEASONED WOOD ONLY. Hard-
woods are recommended (soft woods tend
to burn very quickly).
• DO NOT burn treated wood, charcoal, coal,
trash, driftwood, woods dipped in tar, Christmas tree greens, pitch, pine tar, creosote,
chemical chimney cleaners, flame colorants,
polystyrene packaging, wood products with
synthetic binders (i.e. plywood). Plywood,
lumber and other misc. materials can produce
abnormally high temperatures, sputtering and
smoking fires and may contain hazardous
chemicals to treat insects and fungus.
• If Artificial Logs are burned it is required that
the logs are UL safety listed (see labeling or
documention provided with logs). Read and
follow the log manufacturer's instructions. Do
not treat artificial logs (made from sawdust
and wax) the same way you treat real natural
wood logs. Use only one at a time.
• IMPORTANT: Burning unapproved fuels can
produce excessive temperatures, beyond
the design capabilities of the fireplace and
may produce excess sparks or may contain
hazardous chemicals. Burning unapproved
fuels can result in a chimney fire, a house fire,
personal injury, death or loss of property.
3. NEVER use gasoline, gasoline-type lantern
fuel, kerosene, charcoal lighter fluid, NAPHTHA, ENGINE OIL or similar liquids to start
or “freshen up” a fire in this fireplace. Keep
any flammable liquids a safe distance from
the fireplace.
4. Keep the chimney damper open while any
fire or smoldering embers are present .
5. Use care when selecting window treatments
for windows located near the fireplace. Avoid
using combustible flowing window treatments
such as curtains on nearby windows that are
of sufficient length to be blown in front of an
open flame when the window is opened.
6. With the fire burning, close the protective
mesh screens to keep sparks and embers
INSIDE the firebox. Closed screens prevent
fire, sparks and embers from popping out of
the firebox while a fire is burning. Pull screens
back when adding wood to the firebox.
7. Keep any combustible furniture or decorative pillows at least 60" (1524 mm) from the
fireplace opening.
8. Never leave your fireplace unattended while
it is burning.
9. Be careful adding wood fuel to the fire or
handling fireplace tools such as shovels,
tongs or pokers.
10. Never modify or alter your fireplace system
in any way. To do so may create a potential
fire hazard and void the Limited Warranty.
11. The bottom refractory can be cracked by
excessive abuse such as tossing heavy logs
onto the grate or gouging with fireplace tools.
Exercise caution when adding wood to your
fireplace.
12. Fireplace Inserts - Contact your dealer or
distributor for a list of Lennox fireplace
inserts approved for installation into your
fireplace. DO NOT install a fireplace insert
from any another manufacturer.
13. If you are using your fireplace as a “decorative appliance,” such as with a permanently
installed gas log set, the fireplace damper
must be permanently fixed in the open position. Listed “vent-free” gas log sets may be
used with the damper closed.
14. If this unit is installed indoors, always ensure
that an adequate supply of replacement combustion air from the outside of the house is
accessible to the fire to support normal combustion. Fireplaces consume large volumes
of air during the normal combustion process.
In the event the home is tightly sealed with
modern energy efficient features, the optional
combustion air kit may not provide all the
air required to support combustion. The
manufacturer is not responsible for any
smoking or related problems that may result
from the lack of adequate combustion air. It
is the responsibility of the builder/contractor
to ensure that adequate combustion air has
been provided for the fireplace.
15. Neither the manufacturer nor the seller
warrants “smoke free” operation nor are
we responsible for inadequate system draft
caused by mechanical systems, general construction conditions, inadequate chimney
heights, adverse wind conditions and/or
unusual environmental factors or conditions
beyond our control.
16.Always ensure that the air inlet to the fireplace
is free from debris and any other obstructions
that can block the entrance of air.
GENERAL INFORMATION
1. The all-steel, multi-wall firebox is the heat
center of the system. It is well insulated for
safe clearance to combustibles.
2. The hearth floor and sidewalls of the firebox
are lined with a brick pattern reinforced
refractory for the look of authenticity and
to provide safety.
2
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
3. The metal chimney sections extending from
the firebox top to beyond your roof are two
walled and air-cooled. The inner passage,
or flue, provides the exit for smoke and
gases.
4. The flue damper is a two position (fully
open or fully closed) mechanism operated
by a handle found at the center top of the
fireplace opening. It must be open when fire
is present so smoke and gases can escape.
It should be closed only when the fire is
completely out – keeping room air from
being lost up the flue.
5. Closed screens prevent fire, sparks and
embers from popping out of the firebox
while a fire is burning. Pull screens back
when adding wood to the firebox.
6. Why use a fuel grate? Besides positioning
the firebed properly, it protects the refractory
floor, back and sides of the fireplace. Further,
it ensures a proper flow of combustion air into
and around the firebed. The grate must be used
at all times when burning. Your warranty may
be voided without the use of this grate.
7. This fireplace is not a heater. It is designed
to ensure homeowner comfort by providing
supplemental heat to its immediate area.
FUELS
Never Use Coal in Your Fireplace
Your fireplace system is not designed to be
used with coal derivative products. The combustion process of certain types of coal can
deposit corrosive materials in the fireplace and
chimney system which can lead to premature
product failure. Never use coal as a fuel in this
fireplace system.
Gas Logs
If your fireplace system was installed with a gas
line, you may wish to install one of two types
of gas log sets.
This fireplace has been tested and approved for
use with a decorative gas appliance incorporating an automatic shut-off device and complying
with the Standard for Decorative Gas Appliances
for installation in vented fireplaces, ANSI Z21.60
(latest edition). Decorative gas appliances may
be installed in these fireplaces. Installation
must be in accordance with the National Fuel
Gas Code, ANSI Z223.1 for compliance with
the revised U.L. 127 Standard.
CAUTION
When using a decorative gas
appliance, the fireplace damper
must be set in the fully open
position.
ATTENTION
Si vous utilisez un appareil
décoratif au gaz, le registre de
la cheminée du foyer doit être
ouvert complètement.
WARNING
Unvented Gas Log Sets are
not approved for use with fireplaces installed outdoors. The
materials and components
will deteriorate prematurely if
installed outside. Refer to the
log manufacturer’s literature for
limitations and exceptions.
AVERTISSEMENT
Les ensembles de bûches à gaz
sans conduit d’évacuation ne
sont pas approuves pour l’usage
avec des foyers installes a
l’exterieur. Les materiaux et les
composantes se deterioreront
prematurement si installees
a l’exterieur. Referez-vous a
la litterature du fabricant des
buches pour les limites et les
exceptions.
This fireplace has been tested and approved
to ANSI/IAS/AGA Z21.11.2 for use with an
unvented gas appliance having a maximum
rating of 26,000 BTU and complies with the
Standard for Factory-Built Fireplaces, U.L. 127,
when installed with unvented gas log sets. The
limit may be increased to 40,000 BTU providing that minimum combustible mantel heights
were increased to at least 18 inches when the
fireplace was installed.
Prior to installing any gas log set, (Vented or
Unvented) refer to the fireplace installation
instructions for verification of mantel heights
and placement of combustible materials around
the firebox opening.
IMPORTANT
Never install an unvented gas
log set with a BTU greater than
26,000 if combustible mantel
projections are lower than
18 inches above the fireplace
opening.
ATTENTION
Ne jamais installer un ensemble
de buches a gaz sans conduit
d’evacuation qui genere une
puissance superieure a 26000
si un manteau combustible est
installe plus bas que 18 po. Au
dessus de l’ouverture du foyer.
Vented gas log sets do not have restrictions
placed upon their BTU rating.
Wood Fuel Pointers
Wood is a wonderful renewable fuel source.
Normally it burns clean, leaving only a minimum
of waste ash, provides comforting heat and can
provide a variety of aromas and visual images.
You will want to know which woods are best for
use. Sometimes you may want a quick, short fire
to offset a morning chill. Soft woods are preferable in this case. Other times you would want
more slow burning and a uniform heat output.
Hardwoods are preferable for this use.
The amount of heat available from the logs will
be about equal on a weight basis. However,
logs are generally not weighed so the amount
of heat will depend on:
1. The type of wood used.
2. How dry it is.
3. How many logs you put in.
4. The size of the logs.
The last statement means that one big log weighing 10 pounds has as much heating potential
as 10 pounds of twigs. However, air cannot get
at the solid log to feed the fire so the solid log
will burn slowly. While you would get the same
amount of heat out of either fire, the smaller the
pieces of wood and the more air space around
them, the faster the fire will burn.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
3
4'
4'
8'
Standard
Cord of
Wood
DISPOSAL OF ASHES
Ashes should be placed in a metal container with
a tight fitting lid. The closed container of ashes
should be placed on a noncombustible floor or
on the ground, well away from all combustible
materials, pending final disposal. If the ashes
are to be disposed of by burial in soil or other
wise locally dispersed, they should be retained
in the closed container until all cinders have
thoroughly cooled.
SOFTWOOD VS HARDWOOD
Softwoods contain about 15 percent highly
flammable resin which generates creosote soot
in the chimney flue. Burning softwood exclusively may not be as desirable nor as safe as
burning denser hardwoods. Many experienced
fire-builders use small amounts of softwood
kindling and newspaper in conjunction with
starting a fire with split hardwood logs. Here
are some guidelines to remember:
1. Softwoods produce fast warming and shorter
fires. Hardwoods burn less vigorously, have
shorter flames and produce steady, glowing
coals.
2. As a general rule, denser woods contain more
potential heat per pound. Most softwoods
offer moderate heat value per pound.
3. Different woods vary widely in flame heights,
flame intensities, smoke characteristics
and in sparking. Most hardwoods do not
spark.
4. Most freshly cut “green” wood will not burn
well and will smoke. Green wood can be from
10 to 40 percent less efficient than air-dried
seasoned wood.
5. Moisture and resin found inside unseasoned
wood cells will build up pressure under heat
and explode as sparks.
6. Most wood needs to be seasoned 9 to 12
months to reduce the moisture content and
produce good steady fires. When moisture
content is reduced from 60 to 20%, the gain
in heat potential is nearly 7%.
7. Proper storage of wood, especially during
seasoning, is essential. We recommend that
you:
a. Never store wood on the ground. This
will cause rotting and insect infiltration. Raise wood on flat rock or scrap
wood.
b. Stack wood loosely to allow air circula-
tion.
c. Store wood where it will not be exces-
sively exposed to weather, such as
under a tarp or under a roof.
4
d. Do not stack wood directly against the
walls of your home.
8. Be a knowledgeable wood buyer. There is a
difference in cord sizes. A standard cord stack
of logs is 4 ft. high by 8 ft. long by 4 ft.
deep or the equivalent of this cubic footage,
(Figure 1).
Figure 1
A face cord is the same height and length as a
standard cord but the depth is only the length
of the logs (12, 18 or 24 inches). A face cord
can contain as little as 25% of the wood found
in a standard cord.
If you buy by the ton, remember that wood
becomes lighter as it dries. When buying green
or wet wood, ask for some extra poundage to
allow for the extra water you will be getting.
9. When comparing woods of the same moisture
content and same species, we find most woods
have approximately the same heating potential
per pound.
However, most wood is sold by volume, not by
weight. To determine the best heating source,
look at the density of various wood types.
(Density is the weight for a given size.) The
higher the density, the more potential heat
output. A standard cord has a volume of 128
cubic feet. This Figure also includes the air
space between and around the wood. The actual
volume in a standard cord is between 60 and
100 cubic feet; depending on how tightly the
wood is packed.
Assuming that you are comparing two standard
cords of different species but the same volume
and moisture content, the denser species will
provide more BTU’s. The table of wood species/
densities reveals more helpful guidelines.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
HARDWOODS DENSITY
Alser, Red .41
Ash .49-.60
Aspen .38-.39
Basswood, American .37
Beech, American .64
Birch .55-.65
Butternut .38
Cherry, Black .50
Chestnut, American .43
Cottonwood .34-.40
Elm .60.63
Hackberry .53
Hickory, Pecan .60.66
Hickory, True .69-.75
Honey locust .66 (est.)
Locust, Black .69
Magnolia .48-.50
Maple .48-.63
Oak, Red .59-.67
Oak, White .64-.88
Poplar .42
Sassafras .42
Sweet gum .52
Sycamore, American .49
Tanoak .64 (est.)
Tupelo .50
Walnut, Black .55
Willow, Black .39
SOFTWOODS DENSITY
Bald cypress .46
Cedar .31-.47
Douglas Fir .46-.50
Fir .32-.43
Hemlock .40-.45
Larch, Western .52
Pine .39-.59
Redwood .35-.40
Spruce .35-.41
Tamarack .53
STARTING A FIRE
Note: For outdoor installations, caution must
be observed when operating this fireplace
under windy conditions. Do NOT burn large
fires in windy conditions, as flames may be
drawn out of the firebox. If this occurs, close
the glass doors immediately. If not equipped
with doors, extinguish the fire. The screens
must be closed at all times while the fireplace
is in operation, except when feeding the fire.
1. To properly start a fire in a the fireplace, first
check the operation of the flue damper (see
“DAMPER CONTROL” and Figure 2, next page.
2. For indoor installations, to prevent smoke
at startup, close all windows near the fireplace
when first lighting a fire. The closed windows
may be reopened once a chimney draft is
drawn in the fireplace.
3. Center the grate in the firebox on or over
the bottom hearth so the fire can breathe properly. Crumble and twist plenty of newspapers
UNDER the grate, and criss-cross some small,
dry kindling sticks on top of the paper or on
the bottom of the grate.
(Continued on next page)
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