Lennox Hearth B-Vent Elite LBV-3824MP-H - Manual (Page 6)

6 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
IMPORTANT: UNDER NO CIRCUMSTANCES
CAN THE FIREPLACE TOP SPACERS
(refer to
FIGURE 2 ) BE REMOVED OR MODIFIED, NOR
MAY YOU NOTCH THE HEADER TO FIT
AROUND OR BE INSTALLED LOWER THAN
THE SPACERS. THE HEADER MAY BE IN DI-
RECT CONTACT WITH THE TOP SPACERS
BUT MAY NOT BE SUPPORTED BY THEM.
Fireplace should be secured to side framing
members using the full length
¹⁄₂ inch nailing
flanges that are integral to the appliance at
each side. Use 8d nails
(Figure 9 ).
All appliances are equipped with a gas flex line
and shutoff valve attached directly to the gas
control valve. To quickly and easily complete
the gas line routing, use the gas flex line kit.
Step 3. Position the Appliance - Slide the
fireplace into prepared framing or position fire-
place in its final position and frame later.
4. Use this information and consult your local
building code to determine if you need addi-
tional support.
If you plan to raise the fireplace and hearth
extension, build the platform assembly then
position fireplace and hearth extension on top.
Secure the platform to the floor to prevent
possible shifting.
INSTALLING THE FIREPLACE
Step 1. Construct the Appliance Framing -
Frame appliance enclosure as illustrated in
Figures 4 through 7 on page 5.
Note: The framed depth, 25 ⁵⁄₈" (650 mm) from
a framed wall, must always be measured from
a finished surface. If a wall covering such as
drywall is to be attached to the rear wall, then
the 25
⁵⁄₈" (650 mm) must be measured from
the drywall surface. It is important that this
dimension be exact.
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed.
The header may rest on the top metal spacers,
but must not be notched to fit around them.
Consult all local codes.
Step 2. Route Gas Supply Line - Route gas
line
(Figure 8 ) using techniques and materials
prescribed by local and/or national codes. It is
recommended that a gas line of
¹⁄₂" or greater
diameter be used to allow full gas volume to
the fireplace. Undue pressure loss will occur if
the pipe is too small. The appliance, as set up
at the factory, is best suited for use with a gas
line routed from the left side. The gas line may
however be alternately routed from the right
side.
When rigid pipe is used, an ANSI approved
manual shut-off valve and union must be in-
stalled upstream of the fireplace.
Ensure that a sediment trap is installed in the
existing gas line, if not, install a sediment trap
upstream to prevent moisture and contami-
nants from passing through trap to the appli-
ance controls and burners. Failure to do so
could prevent the appliance from operating
reliably.
IMPORTANT: HOLD GAS VALVE SECURELY
TO PREVENT MOVEMENT WHEN CONNECT-
ING TO INLET GAS LINE
An external regulator must be used on all
propane (L.P.G.) heaters to reduce the supply
tank pressure to 13" w.c. (maximum). Any
copper tubing used to supply propane (L.P.G.)
from the tank must be internally tinned.
Fireplace may be anchored to floor. Bend down
four (4) anchor tabs located at the base of the
fireplace and secure to the floor by nailing with
8d nails
(Figure 10 ).
Figure 10
Refer to fireplace drawings and specifications
on
pages 4 and 5 for framing dimensions and
details. Framing header may be positioned
directly on the fireplace top spacers.
Note: The nailing tabs and the area directly
behind the nailing tabs are exempt from the
clearances described on the fireplace clearance
label.
Figure 8
Figure 9
8d Nail
Anchor
Tab
10 ¹⁄₂"
(269 mm)
3 ¹⁄₂"
(79 mm)
RIGHT
SIDE
LEFT
SIDE
7 ¹⁄₄"
(184 mm)
3 ¹⁄₂"
(79 mm)
WARNING: CONNECTING DIRECTLY TO
AN UNREGULATED PROPANE (L.P.G.)
TANK MAY CAUSE AN EXPLOSION.