Lennox Hearth INTERTEK LMBV-42REN - Manual (Page 8)

8
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
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 2. Route Gas Supply Line
Refer to Figure 9. Using techniques and materi-
als 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.
Figure 9
RIGHT
SIDE
7-3/4"
(197 mm)
3-3/8"
(86 mm)
NOTE: Ensure the Millivolt valve wire is not
routed through the same hole as the gas line.
Route the Millivolt wire through the opposite
side from the gas line.
When rigid pipe is used, an ANSI approved
manual shut-off valve and union must be
installed 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 contaminants
from passing through trap to the appliance
controls 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). appliances 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 CONNeCTING TO
INLeT GAS LINe
WARNING
CONNeCTING DIReCTLY TO AN UN-
ReGULATeD pROpANe (L.p.G). TANK
mAY CAUSe AN expLOSION.
INSTALLING THe FIRepLACe
Step 1. Construct Appliance Framing
Frame appliance enclosure as illustrated in
Figure 8.
NOTE: The nailing flanges, combustible framing
members and screw heads located in areas
directly adjacent to the nailing flanges, are
EXEMPT from the 1/2" clearance to combustible
requirements for the firebox wrapper. Combus-
tible framing may be in direct contact with the
nailing flanges and may be located closer than
1/2" from screw heads and the firebox wrapper
in areas adjacent to the nailing flanges. Frame
the opening to the exact dimensions specified
in the framing details of this manual.
NOTE: The framed depth, 21-5/8" (549 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 21-5/8" (549 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.
TYpICAL INSTALLATION SeQUeNCe
The typical sequence of installation is outlined
below; however, each installation is unique,
resulting in variations to the steps described
herein.
Framing Specifications ...................... page 6
Pre-Installation Notes ....................... page 6
Installing the Fireplace:
Step 1. Construct Appliance
Framing ......................Page 6
Step 2. Route Gas Line .................Page 7
Step 3. Position Appliance ............Page 7
Step 4. Install Vent System and
Exterior Termination ...Page 7
Step 5. Field Wiring; Install (Optional)
Wall Switch ................Page 8
Step 6. Connect to Gas Line .........Page 8
Step 7. Install (Optional) Outside
Air Kit .........................Page 9
Step 8. Install Logs and
Glowing Embers .........Page 10
Appliance Operation:
Step 9. Check Appliance
Operation ....................Page 10
Manual Limit Switch .... Page 10
Millivolt Checkout ........ Page 10
Electronic Checkout ..... Page 10
Step 10. Adjust Burner ...................Page 11
Step 11. Attach "Safety-in-
Operation" Warnings ..... page 12
WARNING
Failure to position the parts in
accordance with these diagrams
or failure to use only parts specifi-
cally approved with this appliance
may result in property damage or
personal injury.
AveRTISSemeNT
Risque de dommages ou de
blessures si les pièces ne sont
pas installées conformément à
ces schémas et ou si des pièces
autres que celles spécifiquement
approuvées avec cet appareil sont
utilisées.
pRe-INSTALLATION STepS
The fireplace may be installed directly on a
combustible floor or raised on a platform of
an appropriate height. Do not place fireplace on
carpeting, vinyl or other soft floor coverings. It
may, however, be placed on flat wood, plywood,
particle board or other hard surfaces. Be sure
fireplace rests on a solid continuous floor or
platform with appropriate framing for support
and so that no cold air can enter the room from
under the fireplace.
The fireplace may be positioned and then the
framing built around it, or the framing may be
constructed and the fireplace positioned into
the opening.
Usually, no special floor support is needed for
the fireplace, however, to be certain:
1. Estimate the total weight of the fireplace
system and surround materials such as
brick, stone, etc., to be installed.
2. Measure the square footage of the floor
space to be occupied by the system, sur-
rounds 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 lo-
cal building code to determine if you need
additional 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.
7-5/8"
(194mm)
3-1/8"
(79mm)