Lennox Hearth Products SUPERIOR B-VENT 600 Series Installation Instructions Manual page 7

B-vented gas appliances
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2. Measure the square footage of the floor
space to be occupied by the system, surrounds
and hearth extensions.
3. Note the floor construction, i.e. 2 x 6's, 2 x
8's or 2 x 10's, single or double joists, type and
thickness of floor boards.
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 6 through 9 on page 6 .
f i r e - p a r t s . c o m
Note: The framed depth, 16 in. (406 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 16 in. (406 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 (see Figure 10 ) using tech-
niques 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 right
side. The gas line may however be alternately
routed from the left side.
When rigid pipe is used, an ANSI approved
manual shut-off valve and union must be in-
stalled upstream of the fireplace.
Figure 10
Ensure that a sediment trap is installed in the
existing gas line, if not, install a sediment trap
upstream to prevent moisture and contaminants
from passing through trap to the appliance con-
trols and burners. Failure to do so could prevent
the appliance from operating reliably.
An external regulator must be used on all pro-
pane (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.
IMPORTANT: HOLD GAS VALVE SECURELY
TO PREVENT MOVEMENT WHEN CONNECT-
ING TO INLET GAS LINE
WARNING: CONNECTING DIRECTLY TO
AN UNREGULATED PROPANE (L.P.G.)
TANK MAY CAUSE AN EXPLOSION.
All appliances are equipped with a gas flex line
and shutoff valve attached directly to the gas
control valve. Use of the gas flex line will aid in
the routing and attachment of the gas line to
the fireplace.
Step 3. Position the Appliance - Slide the
fireplace into prepared framing or position fire-
place in its final position and frame later.
Refer to fireplace drawings and specifications
on page 5 for framing dimensions and details.
Framing header may be positioned directly on
the fireplace top spacers.
IMPORTANT: UNDER NO CIRCUMSTANCES
CAN THE FIREPLACE TOP SPACERS (REFER
TO FIGURE 4 ) 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.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
The fireplace should be secured to the side framing
members using the unit's nailing flanges - two at the
top and bottom on each side of the fireplace front.
See Figure 11. Use 8d nails or their equivalent.
Unit Being Secured By Its Nailing Flanges
To The Framing
Figure 11
Fireplace may be anchored to floor. Bend down
two anchor tabs (one on each side) located at the
base of the fireplace and secure to the floor by
nailing with 8d nails or equivalent (Figure 12 ).
Anchor
Tab
Note:
Some units only have one anchor tab on each side.
Figure 12
7

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