Lennox Hearth Products Electronic LMDV-3530-CNM Installation Instructions Manual page 10

FIREPLACE FRAMING SPECIFICATIONS
Note-
Venting requirments for rear vent applications in corner installations -
• The horizontal vent length "a" to "b" must not exceed 28 inches (711 mm).
LMDVT-3328 and LMDVR-3328 Models -
Dimension A to F occur when one 45 degree elbow is connected directly to the
appliance collar.
LMDVT-3530 and LMDVR-4035 Models -
Dimension D and F occur when one 45 degree elbow is connected directly to the
appliance collar.
M d o l e N . o
. n i 3 3
LMDVT-3328
m m 8
LMDVR-3328
. n i 5 3
LMDV-3530
m m 8
. n i 0 4
LMDV-4035
m m 0 1
Figure 15 - Corner Framing with Square Termination (SV4.5HT-2)
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 require-
ments outlined in the National Fuel Gas Code,
NFPA 54 - latest edition (USA) or B149 - latest
edition (Canada).
Never use galvanized or plastic pipe. Refer
to Table 9 for proper sizing of the gas sup-
ply 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 appliance. Installing
a gas supply line from the fuel supply to the
appliance involves numerous considerations of
materials, protection, sizing, locations, controls,
pressure, sediment, and more. Certainly no one
unfamiliar and unqualified should attempt sizing
or installing gas piping.
10
A B C D
1 8 / 8 4 1 2 / 4 3 / 5 6 1 7 1 / 3 6 1
1 4 2 1 2 3 8 2 7 4 7 3
1 8 / 7 5 1 2 / 0 4 5 8 / 9 1 / 3 6 1
2 9 4 1 1 6 0 1 2 3 4 7 8
1 8 / 6 1 / 3 6 1 3 4 1 / 1 2 3 9 1 / 3 6 1
9 1 5 1 4 5 1 1 1 0 4 7 8
Schedule 40 Pipe
Length (feet)
Table 9
Notes:
• All appliances are factory-equipped with a
flexible gas line connector and 1/2 inch shutoff
valve (see Figure 48 on Page 24 ).
• 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 24 ).
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LMDV and LMDVR units
LMDV and LMDVT units
Inches
(millimeters)
E F
2 1 4 4 / 5
6 6 1 1 7 2
8 2 3 4 / 6 1 8 /
7 0 3 1 6 5
0 3 1 / 1 6 1 7 7 8 /
7 9 7 2 0 0
Schedule 40
Black Iron Pipe
Inside Diameter (Inches)
Natural
Gas
0-10 1/2
10-40 1/2
40-100 1/2
100-150 3/4
150-200 3/4
F
C
a
A
B
Back wall of chase/enclosure
(including any finishing materials)
• 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
Propane
compound does not get inside the pipe.
Gas
• It is recommended to install a sediment trap
in the supply line as close as possible to the
3/8
appliance (see Figure 48 ). Appliances using
1/2
Propane should have a sediment trap at the
1/2
base of the tank.
• Check with local building official for local code
1/2
requirements ( i.e. a re b elow g rade p enetrations
1/2
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.
b
7 1/4 (184)
E
D