Crown Boiler BWC151 Installation Instructions Manual page 15

Horizontal Terminal Clearance Requirements (continued):
• Vent terminal must be at least 6 feet from an inside corner.
• Under certain conditions, water in the flue gas may condense, and possibly freeze, on objects around the vent
terminal including on the structure itself. If these objects are subject to damage by flue gas condensate, they
should be moved or protected.
• If possible, install the vent and air intake terminals on a wall away from the prevailing wind. Reliable operation
of this boiler cannot be guaranteed if these terminals are subjected to winds in excess of 40 mph.
• Air intake terminal must not terminate in areas that might contain combustion air contaminates, such as near
swimming pools. See Section IV for more information on possible contaminates.
VENT OPTION #
CLASSIFICATION USED IN THIS
MANUAL
ILLUSTRATED IN FIGURE
VENT PIPE PENETRATION
THROUGH STRUCTURE
AIR INTAKE PIPE PENETRATION
THROUGH STRUCTURE
VENT PIPE SIZE
AIR INTAKE PIPE SIZE
VENT TERMINAL
AIR INTAKE TERMINAL
VENT MATERIAL
AIR INTAKE MATERIAL
Note #1: In Vent Option #1, the 80/125mm concentric straight section (PN 230515) shown in Table 7.4a may be used between the
boiler and the first 80/125 x 60/100 reducing elbow. If this is done, the overall maximum vent length is still restricted to that shown for
Vent Option #1 in Table 7.1 above.
TABLE 7.1: SUMMARY OF HORIZONTAL VENTING OPTIONS
HORIZONTAL
CONCENTRIC
CONCENTRIC
BWC070
BWC090
BWC120
BWC151
BWC070
BWC090
BWC120
BWC151
BWC070
BWC090
BWC120
BWC151
BWC070
BWC090
BWC120
BWC151
CONCENTRIC
COMPONENTS
1 2
HORIZONTAL
TWIN PIPE
7.2 7.3
WALL WALL
WALL WALL
3"
60/100 mm
3"
32ft
100ft
32ft
100ft
18ft
100ft
100ft
32ft
100ft
32ft 100ft
18ft
100ft
100ft
10in 10in
10in
10in
10in
10in
10in
10in 10in
10in
10in
10in
10in
10in
CROWN
#230511
60/100 mm
3" 90 ELBOW
APPROVED
CROWN
STAINLESS
60/100mm
STEEL VENT
VENT
SYSTEM
SHOWN IN
SHOWN IN
TABLE 7.5
TABLE 7.4a
GALVANIZED
(Note #1)
OR PVC
13
3
HORIZONTAL
CONCENTRIC
7.2
WALL
WALL
80/125 mm
CONCENTRIC
100ft
100ft
100ft
100ft
100ft
100ft
100ft
100ft
10in
10in
10in
10in
10in
10in
10in
10in
Crown 230531
CONCENTRIC
or 230540
SNORKEL
CROWN
80/125mm VENT
COMPONENTS
SHOWN IN
TABLE 7.4b