Combustion Air Kits; Optional Equipment Considerations; Gas Line Connection - Lennox Hearth Products Elite LBR-3824 Installation Instructions Manual

Offset Elbow Assembly
Offset elbows install the same as chimney
sections. First, snap the inner section INTO the
preceding inner section of flue. Check connec-
tion by pulling up slightly to ensure a tight fit.
Next, the outer sections snap lock OVER the
preceding outer section of chimney. Again,
check outer section by pulling up slightly to
ensure proper connection is made.
Return Elbow Assembly
Return elbows install the same way as round
terminations and stabilizers:
Step 1. Hold return elbow over top of last
chimney section.
Step 2. Center inner slip section into inner flue
pipe-slip down.
Step 3. Center outer-locking section over outer
chimney pipe. Push down until locking joint has
firmly engaged.
Step 4. Pull up slightly on return elbow to
ensure locking joint has firmly engaged.
Step 5. Secure support straps to framing
members by nailing under tension in sheer
( Figure 42 ).
Figure 42
Note: The return elbow assembly performs
the same function as a stabilizer. Consider this
when determining the need for a stabilizer.
Note: Do not apply excessive pressure to any
subsequent chimney section following return
elbow assembly when installing. Ensure that
each subsequent chimney section is securely
attached by testing as noted above.

Combustion Air Kits

You may use the combustion air kit, Model
FOAK-4 or FOAK-4LD, with the LBR/LBC Series
fireplaces. Refer to the installation instructions
packed with the air kit for specific installation
information. The outside air kit must be in-
stalled before the fireplace is totally framed and
enclosed within the finished walls.
The combustion air kit provides for outside air
to be drawn into the fireplace as an aid for
combustion. If installed, only one combustion
air kit is needed and it will be installed on the left
side of the fireplace. If additional length of air
duct is necessary, purchase locally available
U.L. Class 0 or Class 1 metallic duct. The duct
may extend up to 50' (15.24 m) in any direction.
Note: When installing the air duct vertically,
DO NOT terminate the air duct closer than 3'
(914 mm) below the chimney top.
There is a hand operated shut-off lever located in
the left side of the fireplace opening behind the
screen. To open, pull all the way. The combus-
tion air damper should be fully open when the
fireplace is in use and completely closed when
the fireplace is not being used. This will prevent
outside cold air from entering the dwelling.
Operate the actuator through several cycles
including the "lock position. Ensuring proper
operation and freedom of movement. Return
the actuator arm to the locked position.
CAUTION: NEVER LOCATE THE AIR INLET
WHERE IT COULD BE BLOCKED BY SHRUBS,
SNOWDRIFTS, ETC. NEVER LOCATE AIR INLET
IN A GARAGE OR IN ANY AREA WHERE THERE
IS ANOTHER FUEL BURNING APPLIANCE OR
PRODUCTS EMITTING COMBUSTIBLE GASES
Return
SUCH AS PAINT, GASOLINE, ETC. IN COLD
Elbow
CLIMATES IT IS RECOMMENDED THAT THE
COMBUSTION AIR DUCT BE INSULATED.
The outside air ducting may be installed upwards
through framing and ceiling joists, with the inlet
hood installed through an outside wall. Air duct-
ing may also be installed downward through
floor joists and under the dwelling to a ventilated
crawlspace not considered part of the living area.
Note: Do Not terminate the combustion air kit
in an attic space under any circumstances.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Forced Air Kit
If you are installing the Lennox Forced Air Kit,
Model LFAK-2000, see the instruction sheet
provided with the kit for electrical wiring re-
quirements. The fireplace has been pre-wired
at the factory but must be connected to main
power supply at the time of installation if the
LFAK-2000 is to be installed later. The electrical
connections must be made before the fireplace
is framed and enclosed in the finished walls.
CAUTION: ELECTRICAL CONNECTIONS
SHOULD ONLY BE PERFORMED BY A QUALI-
FIED, LICENSED ELECTRICIAN. MAIN POWER
MUST BE OFF WHEN CONNECTING FANS TO
MAIN ELECTRICAL POWER SUPPLY OR PER-
FORMING SERVICE.
Variable Speed Wall Switch
Refer to the installation instructions provided
with the Variable Speed Wall Switch, Model
VSWS, for installation details.
OPTIONAL EQUIPMENT
CONSIDERATIONS

Gas Line Connection

Always plumb gas line installation per local
codes. Check all connections with soap suds;
leaks will bubble. Never test any gas line con-
nection with a match or open flame.
This provision is intended for connection to a
decorative gas appliance incorporating an au-
tomatic shut-off device and complying with the
Standard for Decorative Gas Appliances for
installation in vented fireplaces, ANSI Z21.60
(1991) or American Gas Association draft re-
quirements for Gas-Fired Log Lighters for Wood
Burning Fireplaces, Draft No. 4 dated August,
1993. Install in accordance with the National
Fuel Gas Code, ANSI Z223.1. This complies
with the revised U.L. 127 standard.
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