Lennox Hearth ELITE SERIES LBC-3824 - Manual (Page 4)

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
4
Figure 2
Chase Enclosure
A chase is a vertical box-like structure con-
structed to surround the fireplace and chimney.
Refer to Figure 2 for a typical chase configura-
tion. As with all chimney installations, avoid
overhead obstructions such as trees, power
lines, etc. A chase should be constructed and
insulated just like any outside wall. In a cold
climate, we recommend the base of the chase
should also be insulated between the solid
continuous floor beneath the fireplace and the
chase bottom. Chase insulation in a cold cli-
mate installation is not required for safety.
Chimney Height
The total height of your completed fireplace
system from the surface the fireplace rests on
to the chimney top must not exceed 80 ft
(24.4 m) and must also meet minimum height
requirements. Refer to the minimum system
height chart, below.
Note: Do not insulate the chase cavity with
blown or fill type insulation materials.
LOCATION OF FIREPLACE
Carefully select the proper location for heat
circulation, aesthetics, chimney obstructions
and clearance to side wall(s). With proper pre-
planning, a slight adjustment of a few inches
can save considerable time and expense later
during construction and assembly.
Hearth
Hearth
Optional
Outside Chase
Figure 4
Carefully consider the position of the fireplace
opening with respect to the location of adja-
cent or nearby stairwells, bath or kitchen ex-
haust fans and/or return air registers for forced
air furnaces/air conditioners that could cause
a smoking fireplace condition if the house is
tightly insulated.
When locating the fireplace, consideration must
be given to combustibles and final finishing.
See Figure 5 and confine the final location of
combustible finish materials to the “Safe Zone.”
Insulate Joists
Same As Ceiling
Draft Stops
Note: Non-
Combustible
Chase
Flashing
must be
Used to
Cover
Chase
Opening
Optional
Insulation
in Outside
Walls of
Chase
Solid
Continuous
Surface
Outside
Base
Insulation
(Thermal Barrier)
8'
(2.4m)
Level
F10FS-2
Firestop
FTF10-CT2
Termination
19"
(483mm)
19"
(483mm)
WARNING: IF INSULATION IS USED, THE
FIREPLACE MUST NOT BE PLACED DI-
RECTLY AGAINST IT. INSULATION OR
VAPOR BARRIERS, IF USED, MUST FIRST
BE COVERED WITH GYPSUM BOARD,
PLYWOOD, PARTICLE BOARD OR OTHER
MATERIAL TO ASSURE INSULATION AND
VAPOR BARRIERS REMAIN IN PLACE.
WARNING: DO NOT PACK OR FILL RE-
QUIRED AIR SPACES WITH INSULATION
OR OTHER MATERIAL. NO MATERIAL IS
ALLOWED IN THESE AREAS.
Note: Local codes may not require firestopping
at the ceiling levels for outside chase installa-
tions. However, it is recommended for safety
and the reduction of heat loss.
MINIMUM SYSTEM HEIGHT
Security FTF10 Pipe
Vertical Installation 14 ft (4.3 m)
One Offset
Two Offsets 16 ft (4.9 m)
24 ft (7.3 m)
Figure 3
ASSEMBLY OUTLINE
Before You Start
Check the inventory list to be sure you have all
necessary parts in good usable condition. Also
check for any concealed damage.
Check the operation of the damper. The dam-
per is controlled through the use of a damper
rod inside the top center of the firebox open-
ing, behind the lintel (Figure 3).
• To CLOSE the damper, PUSH the damper rod
UP and BACK (toward the rear of the fire-
place), until locked in position.
• To OPEN the damper, PULL the damper rod
FORWARD (toward the front of the fireplace)
and DOWN, until locked in position.
To CLOSE damper, PUSH damper rod UP
and BACK (toward rear of fireplace).
To OPEN damper, PULL damper rod DOWN
and FORWARD (toward front of fireplace).
Combustion Air Actuator
Lintel
Damper
CLOSED
Damper
OPEN
~
Damper Rod