Filter
Top Products
7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT
®
SERIES B-VENT GAS FIREPLACES • 36" LMBV MODELS • INSTALLATION INSTRUCTIONS
Figure 9
Figure 10
All appliances are equipped with a gas ex line
and shutoff valve attached directly to the gas
control valve. To quickly and easily complete
the gas line routing, use the gas ex line kit.
Step 2. Route Gas Supply Line
Refer to Figure 8. 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 replace. 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.
Step 3. Position Appliance
Slide the fireplace into prepared framing or posi-
tion fireplace in its final position and frame later.
Refer to fireplace drawings and specifications
on pages 5 and 6 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 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 DIRECT
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
anges that are integral to the appliance at each
side. Use 8d nails or equivalent.
Note: The nailing tabs and the area directly behind
the nailing tabs are exempt from the clearances
described on the fireplace clearance label.
Step 4. Install Vent System and
Exterior Termination
A. Connect a 6" (152 mm) Type B vent system
to the appliance ue collar with four (4)
No. 8 sheet metal screws (Figure 9 ) and
install the remainder of the Type B vent to
the outside.
B. The following venting configurations may
be installed (see Figure 10):
- Vertical - Minimum overall height of
the vent system and appliance without an
offset must be 12' (3.66 m)
- With Offset
a. Minimum overall height of the vent
system and appliance must be 12' (3.66
m) when an offset up to 45 degrees
from the vertical is used. There must
be a minimum vertical vent height of
2 ft (0.6 m) above the appliance collar
before the offset can be applied.
b. Minimum overall height of the vent
system and appliance must be 15'
(4.57 m) when an offset, more than
45 degrees but less than 60 degrees
from the vertical, is used. There must
be a minimum vertical vent height of
2 ft (0.6 m) above the appliance collar
before the offset can be applied.
- With Offset, when using the optional,
36GEP or 36GEP-BB, non-operable glass
doors
Minimum overall height of the vent system
and appliance must be 12' (3.66 m) when
an offset up to 60 degrees from the vertical
is used. The lower part of the offset may
start at the appliance ue collar.
12 ft.
Minimum
60*
degrees
Maximum
12 ft.
Minimum
Back View
Of Appliance
*12 ft. Min.
**15 ft. Min.
2 ft.
Minimum
To Offset
*with an offset up to 45 degrees
** with an offset greater than 45
degrees and up to 60 degrees
Back View
Of Appliance
Back View
Of Appliance
1
2
3
WARNING: CONNECTING DIRECTLY TO
AN UNREGULATED PROPANE (L.P.G.)
TANK MAY CAUSE AN EXPLOSION.
6”
Type B-Vent
Flue Outlet
Collar
Securing
Screws
Figure 8
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.) 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 CONNECTING TO
INLET GAS LINE
*This Vent Configuration Allowable
Only WithThe Following Optional
Non-Operable Glass Doors installed:
36GEP or 36GEP-BB