Lennox Hearth FIREPLACE FRAMING SPECIFICATIONS, Figure 14 - Corner Framing with Horizontal Termination, Figure 15 - Route Gas Line, Table 7, Proper Sizing of Gas Line, Step 2. ROUTING GAS LINE

11
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
FIREPLACE FRAMING SPECIFICATIONS
Figure 14 - Corner Framing with Horizontal Termination
Schedule 40
Black Iron Pipe
Inside Diameter (Inches)
Schedule 40 Pipe
Length (feet)
Natural
Gas
Propane
Gas
0-10 1/2 3/8
10-40 1/2 1/2
40-100 1/2 1/2
100-150 3/4 1/2
150-200 3/4 1/2
Table 7
Notes:
• Allappliancesare factory-equippedwitha
flexible gas line connector and 1/2 inch shutoff
valve (see Figure 39 on Page 26).
• SeeMassachusetts Requirements on Page 4
for additional requirements for installations in
the state of Massachusetts in the USA.
• ThegassupplylineshouldNotbeconnected
to the appliance until Step 6 (Page 26).
• Apipejointcompoundratedforgasshouldbe
used on the threaded joints. Ensure propane
resistant compounds are used in propane
applications. Be very careful that the pipe
compound does not get inside the pipe.
• Itisrecommendedtoinstallasedimenttrap
in the supply line as close as possible to the
appliance. Appliances using Propane should
have a sediment trap at the base of the tank.
• Checkwithlocalbuildingofcialforlocalcode
requirements (i.e. are below grade penetrations
of the gas line allowed?, etc).
IMPORTANT: If propane is used, be aware that
if tank size is too small (i.e. under 100-lbs, if
this is the only gas appliance in the dwelling.
Ref. NPFA 58), there may be loss of pressure,
resulting in insufficient fuel delivery (which
can result in sooting, severe delayed ignition
or other malfunctions). Any damage resulting
from an improper installation, such as this, is
not covered under the limited warranty.
Proper Sizing of Gas Line
Properly size and route the gas supply line
from the supply regulator to the area where the
appliance is to be installed per requirements
outlined in the National Fuel Gas Code, NFPA
54 - latest edition (USA) or CAN/CSA-B149.1
- latest edition (Canada).
Also see Figure 13.
Figure 15 - Route Gas Line
Step 2. ROUTING GAS LINE
Route a 1/2" (13 mm) gas line to the left side
of the appliance as shown in Figure 15. Gas
lines must be routed, constructed and made
of materials that are in strict accordance with
local codes and regulations. All appliances
are factory-equipped with a flexible gas line
connector and 1/2 inch shutoff valve. (See
Step 6 on Page 26).
Never use galvanized or plastic pipe. Refer to
Table 7 for proper sizing of the gas supply line,
if black iron pipe is being used. Gas lines must
be routed, constructed and made of materials
that are in strict accordance with local codes
and regulations.
We recommend that a qualified individual such
as a plumber or gas fitter be hired to correctly
size and route the gas supply line to the appli-
ance. Installing a gas supply line from the fuel
supply to the appliance involves numerous
considerations of materials, protection, siz-
ing, locations, controls, pressure, sediment,
and more. Certainly no one unfamiliar and
unqualified should attempt sizing or installing
gas piping.
ledoM
.oN ABCDE
53VDLE .ni61/3538/5365461/75161/3113
mm29834113411293807
04VDLE .ni61/3048/5862/1844/1718/343
mm120134712321834378
54VDLE .ni61/3548/53725914/363
mm841107811231384339
Note-
Venting requirements for corner installations - the horizontal
vent length “a” to “b,” must not exceed 28 inches (711 mm).
Inches
(millimeters)
*These dimensions occur when one 45 degree elbow
is connected directly to the appliance collar.
*C
Back wall of chase/enclosure
(including any finishing materials)
a
*E
*D
A
*B
7 (178)
b
Left Side Front
Corner of Fireplace
Framing
6-1/2"
(152 mm)
2-1/4"
(57 mm)