Raypak AVIA 264A Installation And Operation Manual page 9

Description
a. 3-1/2" (89 mm) thick
masonry walls without
ventilated air space
b. 1/2" (13 mm) insulation
board over 1" (25 mm)
glass fiber or mineral
wool batts
c. 0.024 sheet metal over
1" (25 mm) glass fiber
or mineral wool batts
reinforced with wire on
rear face with ventilated
air space
d. 3-1/2" (89 mm) thick
masonry wall with
ventilated air space
e. 0.024 sheet metal with
ventilated air space
f. 1/2" (13 mm) thick
insulation board with
ventilated air space
g. 0.024 sheet metal with
ventilated air space over
0.024 sheet metal with
ventilated air space.
h. 1" (25 mm) glass fiber
or mineral wool batts
sandwiched between two
sheets 0.024 sheet metal
with ventilated air space
Derived from National Fuel Gas Code, Table 10.2.3
Table D. Reduction of Clearances to Protected Surfaces
Heaters must not be installed under an overhang of less
than three 3' (0.9 m) from the top of the heater. Three sides
must be open in the area under the overhang. Roof water
drainage must be diverted away from the heaters installed
under overhangs with the use of gutters.
Distance
Location
in. (mm)
Back 9 (229)
Right 9 (229)
Left 9 (229)
Vent 5 (127)
Indoor Top 39 (991)
Outdoor Top Unobstructed
Back 6 (152)
Right 6 (152)
Left 6 (152)
Vent 3 (76)
Indoor Top 30 (762)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 3 (76)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 6 (152)
Right 6 (152)
Left 6 (152)
Vent 6 (152)
Indoor Top 39 (991)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 2 (51)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 3 (76)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 3 (76)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 3 (76)
Indoor Top 24 (610)
Outdoor Top Unobstructed
For U.S. installations, the point from where the flue
products exit the heater must be a minimum of 4' (1.2 m)
below, 4' (1.2 m) horizontally from, or 1' (0.3 m) above any
door, window or gravity inlet into any building. The top
surface of the heater shall be at least 3' (0.9 m) above
any forced air inlet, or intake ducts located within 10' (3 m)
horizontally.
For Canadian installations, pool heaters shall not be
installed with the top of the vent assembly within 10' (3 m)
below, or to either side, of any opening into the building.
Refer to the latest revisions of CAN/CSA-B149.
A minimum of 6' (1.8 m) is required from the heater to an
inside corner wall for proper outdoor venting.
For installations in Florida and Texas, that must comply
with the Florida or Texas Building Code, follow the directions
shown in Figure 5 for the installation of hurricane tie-down
brackets for all models.
4' (1.2 m)
MIN
4' (1.2 m)
MIN
3' (0.9 m)
MIN
10' (3 m)
MIN
FORCED AIR
INLET
Figure 4.
Indoor Heater Installation
For Canada, indoor installation is restricted to an enclosure
that is not occupied and does not directly communicate
with an occupied area. Refer to the latest edition of CAN/
CSA-B149 for specific requirements. Locate heater as
close as is practical to a chimney or gas vent. Heater must
always be vented to the outside. See "Venting" section on
page 13 for details. Minimum allowable space is shown
on the nameplate.
4' (1.2 m)
MIN
4' (1.2 m)
MIN
Clearances
9