Boiler Installation
7
Logano G125 BE - Specifications subject to change without notice.
21
7.1.1.3 Vertical Vent
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.
z
Follow damper manufacturer’s instructions as to
placement.
z
Adjust draft for negative 0.02 – 0.04" W.C.
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)
1
3
2
4
5
6
Venting system: 5" Vertical Vent
Comment
Draft
Combus-
tion air
Max. Vent length
Barometric
damper required
Negative Outside air
or room air
60 ft.
WARNING!
DANGER TO LIFE
from toxic flue gases.
z
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.
z
Each venting section must be support-
ed at each elbow and at least every 48"
of straight pipe.
WARNING!
DANGER TO LIFE
from toxic flue gases.
z
Verify that all vent pipe connections
have been installed properly.
z
Have the entire venting system cleaned
and inspected annually by a qualified
service company.
