Installation Of The Roof Penetration Of A Vertical Flue Systems - Buderus Logano plus GB312 Installation Manual

6
Installing the boiler
6.4

Installation of the roof penetration of a vertical flue systems

All instructions issued by the flue system
manufacturer concerned regarding the fitting
of the roof exit must be followed. Use only
those that are required for the necessary flue
pipe diameter. The use of a T-piece or a 90°-
elbow as the external terminal for the flue
pipe is required.
Always make sure that the flue is connected
with a downward slope towards the boiler
(¼" per foot).
Observe the clearances for the roof exit above the roof
( Fig. 14).
If the flue passes through ceilings at any points, fire plates
( Fig. 14, [2]) must be fitted.
6.5 Connecting the air supply (for direct vent operations)
The combustion air is supplied to the boiler either through
an external wall connection, through a chimney flue or
through a separate pipe in the chimney flue. For direct
vent operation, a suitable air supply system must be used
(made of PVC or CPVC, galvanized steel or other suitable
material).
The flue and air supply system (for design of flue connec-
tion Section 6, page 22) must be designed for a max.
pressure of 0.40 inches W.C. for the overall system (flue
and air supply system).
Use Tab. 8 or refer to the GB312 Application Manual for
detailed descriptions of maximum permissible vent
lengths and dimensioning of exhaust venting systems.
We recommend that the air supply pipe di-
ameter matches the flue pipe diameter.
26
Fig. 14 Vertical flue system
1
2
3
4
Boiler rat-
90 - 4
120 - 4
160 - 5
200 - 6
240 - 7
280 - 8
Tab. 8 Air supply volumetric flow rate/Air supply pipe
Logano plus GB312 - Technical specifications are subject to change without prior notice
10 Min
Roof penetration
Fire protection collar
Fastening the flue pipe
Flue pipe adaptor (available separately)
Required air supply
ing volumetric flow rate
3
[ft /m]
N
95
95
130
160
190
220
diameter
1
2
3
3
4
7 747 010 720-14.2RS
Recommended air supply
pipe diameter
[inches]
5
6
6
8
8
8