HIGH EFFICIENCY DIRECT VENT FURNACES
7
FIGURE 1
A. Clearance above grade, veranda, porch, deck or balcony
12-inches (30 cm) minimum.
(3) see notes below
B. Clearance to window or door that may be opened
12-inches (30 cm) minimum.
(3) see notes below
C. Clearance to permanently closed window (minimum
12-inches (30 cm) recommended to prevent
condensation on window.
D. Vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 2 feet
(60 cm) from the centerline of the terminal 18-inches
(46 cm) minimum.
E. Clearance to unventilated soffit 12-inches (30 cm)
minimum clearance to vinyl soffit 36-inches (90 cm)
minimum.
F. Clearance to outside corner 12-inches (30 cm) minimum.
G. Clearance to inside corner 18-inches (46 cm) minimum.
H. Not to be installed above a meter/regulator assembly
within 3 feet (90 cm) horizontally from the centreline of
the regulator.
(3) see notes below
I.
Clearance to service regulator vent outlet 6 feet (1.8 m)
minimum.
(3) see notes below
J. Clearance to nonmechanical air supply inlet to building
or the combustion air inlet to any other furnace 12-inches
(30 cm) minimum.
(3)
see notes below
K. Clearance to a mechanical air supply inlet 6 feet (1.8 m)
minimum.
(3) see notes below
L. Clearance (1) above paved sidewalk or a paved driveway
located on public property 7 feet (2.1 m) minimum.
(3)
M. Clearance under veranda, porch, deck or balcony
12-inches (30 cm) minimum.
(2), (3) see notes below
NOTES (1), (2) & (3):
1.
A vent shall not terminate directly above a sidewalk or
paved driveway which is located between two single
family dwellings and serves both dwellings.
2. Only permitted if veranda, porch, deck or balcony is fully
open on a minimum of two sides beneath the floor.
1
= FIXED/CLOSED
2
= OPENABLE
V
= VENT TERMINAL
A
= AIR SUPPLY
3. As specified in CGA B149 installation codes (1991).
NOTE:
Local codes or regulations may require different
clearances.
Outside Location for Vent
Terminal
Upon delivery, check to make sure the packaging has not
been damaged.
1.
Remove the furnace from box/packaging taking care
not to damage the paper template. This is to be used
to mark the holes for mounting the furnace.
2. After marking where the appropriate holes will be using
the above mentioned template, make a 6-inch
(152.4 mm) diameter hole.
3. Cut the combustion exhaust and fresh air inlet tubes
according to the wall thickness:
Air inlet tube length = wall thi 11/16 in. (14.4 mm)
Flue outlet tube length = wall thi 3 in. 9/16 (90.5 mm)
4. Drill the mounting holes “A” (5 holes) in the wall. If the
wall can receive self–tapping screws, drill 1/8-inch
diameter holes. If not, drill 1/4-inch diameter holes and
use the plastic anchors provided.
5. Place the insulating sheet on the support bracket and
attach the bracket with insulation to the wall by
tightening the five screws with washer.
Figure 3
Be sure the bracket is horizontal.
6. Remove the casing from the furnace body, unscrewing
the two mounting screws.
Figure 3
7. Mount the largest tube (diameter 4-inches (101.6 mm)
and the gasket on the unit frame with the screws
provided.Insert the smallest tube (diameter 2½-inches,
63.5 mm) in the combustion chamber.
Figure 4
