Installation Of The Roof Penetration Of A Vertical Flue Systems; Connecting The Air Supply (For Direct Vent Operations) - Buderus Logano plus GB312 Installation And Service Instructions Manual

6.4 Installation of the roof penetration of a vertical flue
systems
All instructions provided by the flue system
manufacturer concerned regarding the installation of the
wall penetration 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 end piece
for the flue pipe is required.
Always make sure that the flue connector is installed
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 installed.
10 Min
Fig. 14 Vertical flue system with room air for combustion
[1] Roof penetration
[2] Fire protection collar
[3] Fastening the flue pipe
[4] Flue pipe adaptor (available separately)
[5] T-piece with siphon to drain condensate
Logano plus GB312 – 6 720 806 273 (2013/01)
6.5
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 connection,
see Section 6, page 16) must be designed for a max. pressure of
0.40 inches W.C. for the overall system (flue and air supply system).
Use Tab. 10 or refer to the GB312 Application Manual for detailed
descriptions of maximum permissible vent lengths and dimensioning of
exhaust venting systems.
1
2
Table 10 Air supply volumetric flow rate/Air supply pipe diameter
3
▶ Remove the side panel if not already removed.
3
▶ Unscrew the cover plate from the rear panel.
4
5
▶ Attach the 90° elbow on the air supply system to the air inlet
6 720 806 275-01.1T
▶ Construct the air supply pipe using a standard air pipe system
We recommend installing a safety mesh (bird screen) on the air intake
opening. For details of correct dimensioning, contact the manufacturer
concerned.
Fig. 15 Connecting the air supply for balanced flue operation
[1]
[2]
Connecting the air supply (for direct vent
operations)
We recommend that the air supply pipe diameter match
the flue pipe diameter.
Boiler size Required air supply
volumetric flow rate
3
[ft /m]
N
90 - 4 95
120 - 4 95
160 - 5 130
200 - 6 160
240 - 7 190
280 - 8 220
To avoid problems when making the gas connection, it is
best to install a 90° elbow for the air intake connection.
connection through the rear panel and seal.
according to the national requirements.
Bolt
Air supply restriction plate
6
Installing the boiler
Recommended air supply
pipe diameter
[inches]
5
6
6
8
8
8
19