Lennox Hearth WOOD-BURNING FIREPLACES EST-50* - Manual (Page 19)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS
optIonal EquIpmEnt
consIdEratIons
outside combustion air Kits
The installation of an outside combustion air kit
is highly recommended. It is very important to
ensure good fireplace operation in homes which
are tightly weather sealed or have ventilating
appliances installed.
Outside air drawn into the fireplace supplies air
to the fire for combustion. Only one combustion
air duct is necessary if installed.
Use combustion air kit, Model FOAK-4 or Model
FOAK-4LD, with the Estate Series fireplaces.
Refer to installation instructions packed with
the air kit for specific installation information.
The outside air kit must be installed before
the fireplace is framed and enclosed in the
finished walls.
Refer to the installation instruction packed with
each air kit for specific installation information.
The outside air kit, if used, must be installed
before the fireplace is totally framed and en-
closed within the finished walls.
Figure 44
OPEN
CLOSED
EST-50 shown
(EST-36 and EST-42 on left side)
If additional length of duct is necessary, pur-
chase 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 duct closer than 3'
(914mm) below the chimney top. The maxi-
mum height for the outside air duct is 50 feet
above the hearth.
cautIon: nEVEr locatE InlEt WhErE
It can bE blocKEd by shrubs, snoW
drIfts, Etc. nEVEr locatE InlEt In
garagE or any arEa WhErE thErE Is
anothEr fuEl-burnIng applIancE or
products EmIttIng combustIblE gasEs
such as paInt, gasolInE, Etc., In cold
clImatEs It Is rEcommEndEd thE com-
bustIon aIr duct bE InsulatEd.
After completing the installation of the optional
combustion air vent system, the actuator arm
must be put in service and tested to ensure
proper operation before completing any enclo-
sure around the firebox. Failure to do so may
result in extensive and costly rework.
To operate, locate the hand operated shut-off
lever at the lower right side of the fireplace
opening behind the screen (refer to Figure
44). To open the air damper, turn upwards.
To close, turn down.
Operate the actuator through several cycles.
Ensuring proper operation and freedom of
movement. Return the actuator arm to the
closed position.
Outside combustion air ducting may be run
upwards or vertically through framing and
ceiling joists, with the hood installed through
an outside wall and 3' (914 mm) below the
termination. Ducting may also be run downward
through floor joists and under the home to a
ventilated crawlspace not considered part of
the living area of the home.
Note: Do NOT terminate combustion air kit in
attic space under any circumstances.
glass doors
If glass doors are to be installed on these
fireplaces, refer to specific installation instruc-
tions packed with the glass doors. Use only
the doors that are listed for use with these
fireplaces. Use of other non-listed glass door
on these fireplaces may constitute a potential
fire hazard and is not recommended.
cautIon: cErtaIn glass doors oVErlap
thE blacK mEtal facIng of thE fIrEplacE.
If thE fIrEplacE has bEEn facEd WIth
noncombustIblE matErIals, thErE
mIght not bE suffIcIEnt clEarancE
to Install thE glass doors of your
choIcE. EnsurE adEquatE clEarancE Is
maIntaInEd at all tImEs so as not to
IntErfErE WIth thE InstallatIon and
opEratIon of glass doors.