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If you plan on using a pre-existing masonry chimney, have
it thoroughly inspected and cleaned. Any faults which make
the chimney unsafe and unusable must be repaired prior to
use. These can include improper height, structural defects,
blockages, inadequate clearance to combustibles, unsealed
openings into other rooms of the house, signs of creosote or
smoke leakage, a loose or absent clean-out door, or absence
of a liner.
When connecting to a masonry chimney, several provisions
are standard. First, whether the chimney connector is vented
to the chimney through a thimble or a breech pipe, neither
must pass beyond the inner surface of the chimney liner, and
both must be rmly cemented in place with refractory cement.
(A thimble is a masonry pipe which is inserted through the
chimney wall, and is frequently the preferred method; a breech
pipe is a piece of steel pipe used the same way.) In Canada,
a breech pipe has ridges or protrusions to lock it rmly into
the refractory cement. In either case, the chimney connector
vents to the chimney through the thimble or breech pipe.
Using a thimble, the connector slides completely inside the
masonry to the inner edge of the ue liner, and may be eas-
ily removed for chimney and connector inspection. A breech
pipe must extend at least 2" (50 mm) into the room, so the
connector can be attached with sheetmetal screws.
In some situations, a code compliant chimney originally
used for a masonry replace may be used to install your TLC
2000. In addition to the requirements found in the previous
paragraphs, it is important to be aware that all clearances
must be met, including those from the chimney connector to
combustibles — 18" (360 mm) to sides and 18" (450 mm) to
ceiling. Do not forget to include oor protection in your plans.
(See Clearances and Floor Protection in this section.) Since
many replaces have exposed wooden mantels and trim, pay
special attention to the clearances necessary to these materials.
If your replace chimney is behind a combustible wall,
you must use an approved wall pass-through system to gain
access to the masonry chimney. The chimney connector must
enter the chimney at a place where it is lined, and the replace
must be made inoperable. For example, you might remove the
damper, replacing it with a secure, airtight, noncombustible
seal (removable for inspection); this also satises the require-
ment that no room air must be allowed to enter the chimney.
When venting your TLC 2000 using a prefabricated chim-
ney, be sure to contact local building code authorities, and
to follow the manufacturer’s instructions exactly. Use only
the manufacturer’s parts; do not use makeshift installation
techniques. All prefabricated chimneys must be tested to
either the U.S. or Canadian high-temperature standards,
UL
103 or ULC-629.
The Harman TLC 2000 was tested with the fuel door open
and closed.
If you operate with the door open, be sure to install the
optional re screen, and be sure the bypass damper is open.
Do not burn any fuel other than those specied. Other
solid fuels, such as charcoal, can cause increased carbon
monoxide production or overring. Never use highly volatile
substances in your stove, such as gasoline, which could cause
an explosion.
When solid fuels are burned completely, they produce
water and carbon dioxide. However, in long slow burns, a
substantial amount of carbon monoxide may be produced.
If allowed to build up, carbon monoxide (which is odorless)
can prove fatally poisonous. Proper ventilation and draft will
prevent this from happening. If you smell smoke, turn up the
air control lever setting, and thoroughly ventilate your dwell-
ing. During future burns, be careful not to overload the stove
with fuel, so you will not be tempted to constantly operate at
a low air control setting.
Other causes of poor ventilation or draft are icing, exhaust
fans, a blocked outside air inlet, and room air starvation. If
your stove is sluggish and you get occasional odor, check these
possibilities and increase the air ow in your home.