PB Heat Peerless Combi 160, User Manual

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8 - INSTALLATION - Vent & combustion air
8.12.4 - Multiple vent/air
terminations
1. When terminating multiple boilers,
terminate each vent/air connection
as shown in Figures 38 and 39.
WARNING!!! Terminate all
vent pipes at the same height and
all air pipes at the same height to
avoid possibility of severe personal
injury, death, or substantial property
damage.
2. Place roof penetrations to obtain
minimum clearance of 12 inches
between edge of air intake elbow
and adjacent vent pipe of another
boiler for U.S. installations
(see Figure 38). For Canadian
installations, provide clearances
required by CSA B149.1
Installation Code.
3. The air inlet is part of a direct vent
connection. It is not classifi ed as
a forced air intake with regard
to spacing from adjacent boiler
vents.
vertically from
vent outlet to
any air inlet
Vent
Vent
Air intake
Air intake
snow line. Provide vent and air intake with bird screen.
vertically from
vent outlet to
any air inlet
from edge of
air intake pipe
to adjacent
vent pipe from
another boiler
snow line. Provide vent and air intake with bird screen.
Vent
Vent
Air intake
Air intake
Figure 38 - Two pipes Multiple boilers vertical
terminations
Figure 39 - Alternate vertical terminations with
multiple boilers