Lennox Hearth LV

Use caution when ﬁring with the combustion

air control wide open. Only burn cord wood

in this manner. Small dry pieces of softwood

and construction scraps will burn very intensely

using this method and may damage the ﬁrebox.

Medium Combustion

This is the recommended mode of operating

the Brentwood™ LV ﬁreplace and should be

the one normally used since it will deposit the

least amount of creosote on the glass and in

the chimney. The combustion air control must

be 3/4 closed (Figure 1) and pushed in to close

the air boost. The precise setting will depend

on many factors, including chimney length and

the moisture content of the wood.

For instance, a long chimney will necessitate

closing the damper more. To obtain the proper

combustion, close the damper completely, then

open it about 1/4” to 1/2”. Three medium size

pieces of wood should be burning on a bed of

hot coals. The heat output will be approximately

30,000 BTU per hour and the loading time will

be about every 3-4 hours. Softwoods may be

burned using this method but the time will be

substantially reduced.

Slow Combustion

When the air combustion control is completely

closed, the ﬁreplace is in a slow combustion

phase. If the hearth is hot enough, slow combus-

tion will not extinguish the ﬁre, but there will be

a noticeable change in the ﬂame pattern. The

ﬂames will be slow and may appear dirty if the

wood is too wet (moisture content of 20% and

more). Do not allow the wood to burn without

ﬂame, since this will produce excessive creosote

in the unit.

Creosote may accumulate on the glass door. This

method of burning should be used only after

operating the Brentwood LV ﬁreplace with the

air control opened (Figure 1) to produce a hot

ﬁre for about an hour or at medium pace for at

least three (3) hours. Slow combustion can be

used at night in order to reduce the heat output

and to prolong the burn. The loading time will

be between 6-8 hours.

REFUELING FOR BEST PERFORMANCE

The Brentwood LV ﬁreplace will operate best if

attention is given to operating the unit with the

damper fully opened

(ﬁgure 1)

after refueling

in order to bring the ﬁrebox and the chimney

system up to their optimum operating tempera-

ture. Combustion efﬁciency is relative to ﬁrebox

temperature. A temperature of 932º F (500º C)

and up, with a visible ﬂame, in the upper part

of the ﬁrebox indicates a maximum efﬁciency.

To obtain this temperature, the ﬁreplace must

be operated with the primary air and air boost

controls fully opened during 10 to 20 minutes

after reloading, depending on the heat and on

the moisture content of the wood.

Once you have reached the desired temperature,

the air boost can be closed and the primary air

set to a medium setting. You know you have

reached the desired temperature when, closing

the primary air control, you can see a ﬂame

at the top of the ﬁrebox. The beneﬁt of this

technique will be cleaner glass, less creosoting,

greater efﬁciency and the most pleasing ﬁre for

your enjoyment. If your ﬁreplace is equipped

with a forced air system, make sure the central

blower is turned off during reloading to avoid

smoking problems.

SMOKING –

CAUSES AND TROUBLESHOOTING

To reduce the likelihood of smoking when open-

ing the door, set the combustion air controls to

the left before opening the door. Your ﬁreplace

has been designed and tested to provide smoke

free operation. Occasionally, there may be a

small amount of smoking upon lighting the ﬁre,

until the chimney heats up but this should not

continue. If the ﬁreplace continues to smoke

it is probably for one of the following reasons:

A. Negative pressure in the house -

As the ﬁre burns, air goes up the chimney.

This air must be replaced through leakage

into the house or through the outside air duct.

When operating the Brentwood LV ﬁreplace,

open a nearby window temporarily to check

if there is adequate replacement air supply.

B. Blowers operating (e.g.: range hood) -

These blowers draw air out of the house

and may actually cause a negative pressure

in the house. Turn off all blowers and open

a nearby window to determine if this is the

cause of the problem.

C. Wet wood - Wet or tarred wood will smoulder

and smoke instead of burning properly.

Your

dealer can help you determine if you have

properly seasoned wood for burning.

D. Dirty or blocked chimney - Check to make

sure the chimney is clear and clean.

If dirty

call a certiﬁed chimney sweep or use a

properly sized chimney brush to clean.

E. Chimney not long enough - The minimum

chimney height is twelve (12) feet (3.7 m) not

including the ﬁreplace height. The chimney

must extend at least three (3) feet (915 mm)

above its point of contact with the roof and

at least two (2) feet (610 mm) higher than

any roof or wall within ten (10) feet (3 m) of

it. When installed with offsets, the minimum

chimney height is ﬁfteen (15) feet. Additional

height will increase draft and will decrease

the tendency to smoke.

F. Poor chimney draft - With no ﬁre, there should

be sufﬁcient draft to exhaust cigarette smoke

introduced under the bafﬂe. Chimneys installed

against an outside wall without protection may

generate back draft problems which will cause

start-up problems. To prevent this, open a

nearby window, roll up a piece of paper and

light it. Then, hold it in the upper part of the

ﬁrebox to warm up the chimney. Wait until

the draft is sufﬁcient, then start the ﬁre.

G. Blower for forced air kit operating - Make

sure that the blower is in the “off” position

when you open the ﬁreplace door for reloading.

IMPORTANT CAUTIONS

A. Do not block the hot air vents to the ﬁreplace

as this will cause the ﬁreplace to overheat.

B. Never use gasoline, gasoline-type lantern

fuel, kerosene, charcoal lighter ﬂuid, or

similar liquids to start or ‘freshen up’ a ﬁre

in this ﬁreplace. Keep all such liquids well

away from the ﬁreplace while it is in use.

C. Do not burn coal. The sulphur in coal will

corrode the ﬁrebox.

D. Do not burn driftwood which has been in the

ocean or salt water. The salt will corrode

the ﬁrebox and chimney.

E. Do not burn wood in the area in front of the

grate.

F. Do not abuse the unit by burning paper, or

cardboard or construction material such as

pressed wood, plywood or lumber. Wood

protectors, metallic paper, coal, plastic,

waste, sulphur and/or oil will damage the

ﬁreplace.

G. Do not allow the wood to smoulder or burn

without ﬂame, since this will produce

excessive creosote in the unit

as well as

increased particulate emissions.