Buderus Logano G125 BE US/CA Installation And Service Instructions Manual page 21

7.1.1.3 Vertical Vent
Venting system: 5" Vertical Vent
Comment Draft
Barometric Negative Outside air
damper required
Extend the vertical vent pipe sufficiently far above the
roof per NFPA 31. Follow all applicable local and nation-
al codes and regulations.
The maximum length of the vertical 5" venting system is
60 ft.
The 5" vertical venting system operates under a slight
negative pressure, which requires a barometric damper.
Follow damper manufacturer's instructions as to
placement.
Adjust draft for negative 0.02 – 0.04" W.C.
DANGER TO LIFE
from toxic flue gases.
WARNING! Vertical vent pipe must have an ap-
proved fire stop at each ceiling penetra-
tion and the stack must be properly
supported at its base.
Each venting section must be support-
ed at each elbow and at least every 48"
of straight pipe.
DANGER TO LIFE
from toxic flue gases.
WARNING!
Verify that all vent pipe connections
have been installed properly.
Have the entire venting system cleaned
and inspected annually by a qualified
service company.
Logano G125 BE - Specifications subject to change without notice.
Combus- Max. Vent length
tion air
60 ft.
or room air
2
4
Fig. 14 Vertical venting system installation (supports are not
shown for clarity)
1 Roof Penetration
2 Fire stop
3 All-Fuel or L vent flue pipe
4 Barometric Damper
5 Clean-out
6 Horizontal air connection for combustion air
(optional, see 7.2)
Boiler Installation 7
1
3
5
6
21