Lochinvar Sunc Condensing Boiler 1.3 - Manual (Page 27)

27
Installation & Operation Manual
4
Vertical direct venting
(continued)
Multiple vent/air terminations
1. When terminating multiple SYNC boilers, terminate
each vent/air connection as described in this manual
(FIG. 4-3).
Terminate all vent pipes at the same height
and all air pipes at the same height to
avoid recirculation of flue products and
the possibility of severe personal injury,
death, or substantial property damage.
2. Place roof penetrations to obtain minimum clearance of
12 inches (305 mm) between edge of air intake elbow and
adjacent vent pipe of another boiler for U.S. installations
(see FIG. 4-3). For Canadian installations, provide
clearances required by CSA B149.1 Installation Code.
3. The air inlet of a SYNC boiler is part of a direct vent
connection. It is not classified as a forced air intake with
regard to spacing from adjacent boiler vents.
12" (305 MM) MINIMUM
VERTICALLY FROM VENT
OUTLET TO ANY AIR INLET
12" (305 MM) MINIMUM FROM EDGE
OF AIR INTAKE PIPE TO ADJACENT
VENT PIPE FROM ANOTHER BOILER
AIR
AIR
VENT
VENT
Figure 4-3 Vertical Terminations with Multiple Boilers
VENT
VENT
AIR
AIR
12" (305 MM) MINIMUM
VERTICALLY FROM VENT
OUTLET TO ANY AIR INLET
Figure 4-4 Alternate Vertical Terminations with Multiple
Boilers
ƽ WARNING