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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Installation
insert venting
Refer to Figure 6 which shows a typical installation of this ap-
pliance into an existing solid-fuel fireplace.
WARNING: This appliance is equipped with a safety control sys-
tem designed to protect against improper venting of combustion
products. Operation of this heater when not connected to a prop-
erly installed and maintained venting system or tampering 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
. 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 alu-
minum 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 connector)
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.
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.
WARNING
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.
VENT KITS
Cat. # Model Description
H0906 VKBVI25 BVI, 4" Dia. x 25’ Length
H0907 VKBVI35 BVI, 4" Dia. x 35’ Length
Figure 7
Figure 6
Figure 5
Draft Tube
Retaining
Screw
The following vent liner kits are available from Lennox Hearth
Products (see Figure 7 and table below).