Clearances; Gas Vent Rule; Framing Specifications - Lennox Crestline LSBV-3628MN Installation Instructions Manual

LENNOX CRESTLINE™ SERIES B-VENT GAS FIREPLACES • 36"/42" LSBV MODELS • INSTALLATION INSTRUCTIONS
The appliance should be mounted on a fully
supported base extending the full width and
depth of the unit. The appliance may be located
on or near conventional construction materials.
However, if installed on combustible materials,
such as carpeting, vinyl tile, etc., a metal or
wood barrier covering the entire bottom surface
must be used.
These appliances may be used for bedroom
installations in the United States and are listed
accordingly. These units may not be installed
in bedrooms in Canada.

CLEARANCES

Minimum clearance to combustibles for the
appliance is as follows: sides and back - 3/8"
(9.52 mm), floor - 0" (0 mm), adjacent wall - 0"
(0 mm), ceiling - 37-1/2" (953 mm).
Venting
Gas Vent Rule – Gas vent caps are not permitted
within 8 feet (2.4 m) of a vertical wall or similar
obstruction. Gas vent caps that are located 8' or
more from a portion of a building which extends
at an angle greater than 45° upward from the
horizontal may terminate in accordance with
Table 1 (Figure 3), provided that in no case
shall any discharge opening on the cap be less
than 2' (610 mm) horizontally from the roof
surface (National Fuel Gas Code ANSI Z223.1
(NFPA 54) 7.6.2) (CAN/CGA B149).
12
Roof Pitch is X/12
Minimum Height from Roof
to Lowest Discharge Opening
Minimum Height
from Roof to Lowest
Roof Slope
discharge Opening
Feet
Flat to 6/12 1' 0"
Over 7/12 to 9/12 2' 0"
Over 10/12 to 12/12 4' 0"
Over 13/12 to 16/12 6' 0"
Over 17/12 to 21/12 8' 0"
Note: Venting terminals shall not be recessed
into a wall or siding.
Table 1

FRAMING SPECIFICATIONS

Fireplace Framing
Figure 4
Back Wall of Chase/Enclosure
Including Finising Materials
if any
G
Rough
Framing Face
(Unfinished Shown)
X
Figure 5
Back Wall of Chase/Enclosure
Including Finishing Materials
if any
Figure 3
G
Meters
0.3
0.6
Figure 6
1.2
1.8
2.4
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Header
B
A
Combustion
Air Kit
C
H A H
Inside Chase
Optional Locations
C
FOAK
Combustion
Air Kit
J
FATO Adapter
(Optional)
A
Rough Framing Face
(Unfinished Shown)
Outside Chase
Back Wall of Chase/Enclosure
Including Finishing Materials
if any
D
K
C
A
E
Corner Installation
Figure 7
Framing dimensions
Fireplace Opening Width
LSBV-3628
42-1/4"
A
(1073 mm)
52-1/2"
B
FOAK
(1344 mm)
23-9/16"
C
(599 mm)
11-1/4"
d
(286 mm)
63-1/2"
E
(1613 mm)
31-3/4"
F
(807 mm)
20-1/2"
G
(521 mm)
4"
H
(102 mm)
j 7-1/2"
(190 mm)
44-3/16"
K
(1122 mm)
Note: All framing dimensions calcu-
lated for 1/2" dry wall at the appliance
face. If sheathing the chase or finishing
with other thickness materials, calcula-
tions will need to be made.
FOAK-4
Combustion
Air Kit
F
G
Rough
Framing Face
(Unfinished Shown)
LSBV-4228
48-1/4"
(1226 mm)
52-1/2"
(1344 mm)
29-9/16"
(751 mm)
14-1/4"
(362 mm)
69-1/2"
(1765 mm)
34-3/4"
(883 mm)
20-1/2"
(521 mm)
4"
(102 mm)
7-1/2"
(190 mm)
49-1/8"
(1248 mm)
5