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INSTALLATION
Insert Venting
Refer to Figure 6 which shows a typical installation of this
appliance into an existing solid-fuel fireplace.
WARNING: This appliance is equipped with a safety control
system designed to protect against improper venting of combus-
tion products. Operation of this heater when not connected to
a properly installed and maintained venting system or tamper-
ing with the blocked vent shut-off system can result in carbon
monoxide (CO) poisoning and possible death.
Insert must be vented to the outside in accordance with the current edition
of the National Fuel Gas Code ANSI-Z223.1-latest edition, also known
as NFPA 54 (In Canada, the current CAN/CSA B149.1 installation code).
The insert must not be connected to a chimney flue serving a separate
solid fuel burning appliance.
This gas insert requires a 4" diameter B-vent or listed flex aluminum
or stainless chimney liner extending the entire length of the chimney to
ensure proper operation. The vent should terminate with a chimney cap
or rain cap. Chimney should be sealed around cap to prevent air and rain
from entering chimney. Adhere to vent manufacturer's instructions for
installation and vent termination.
A minimum flue height of 12 feet is recommended.
The insert must be installed so the draft hood is in the same
atmospheric pressure zone as the combustion air inlet to the
appliance.
Flue Collar Connection
This insert has a detachable flue collar to
ease installation. To detach flue collar lift
removable vent (trivet) from top of insert,
unscrew draft tube retaining screw (see
Figure 5) and slide draft tube and flue
collar to the rear. Attach flue collar (with
3 sheet metal screws or a B-vent con-
nector) to vent pipe previously installed
in chimney. As the insert is pushed into
fireplace guide draft tube and flue col-
lar into guide brackets until draft tube
retaining screw can be reinstalled in its
original hole.
Draft Tube
Draft Tube
Retaining
Retaining
Screw
Screw
Figure 5
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Chimney Cap
Storm Collar
Chimney - Use With B-vent
Chimney Or Single Wall
Gas Vent Flex Chimney
Liner Listed To UL 1777
Or ULC S635.
Figure 6
B-Vent Fireplace Insert Vent Requirements - Type B-Vent
or listed gas fuel type vent liner listed to UL 1777 (Chim-
ney Liners) or ULC S635 (Standard For Lining Systems
For Existing Masonry Or Factory-built Chimneys And
Vents).
Do not substitute the heat-rated flex liner (UL1777 or ULC
S635) for the exhaust with any other type liner or a fire
may result causing property damage, personal injury or
loss of life.
The following vent liner
kits are available from
Lennox Hearth Products
(see Figure 7 and table
below).
Figure 7
VENT KITS
Cat. #
Model
H0906
VKBVI25
H0907
VKBVI35
WARNING
Description
BVI, 4" Dia. x 25' Length
BVI, 4" Dia. x 35' Length
9
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