Open Flue Operation; Shaft Cross-Sections; Test Port; Terminal Openings - Buderus Logano GB125 Installation And Maintenance Instructions Manual

3 Specification
3.5

Open flue operation

(Installation type B23, B23P, GA or B33, GAX)
For the ventilation of the boiler room, a ventilation aper-
ture to the outside offering a minimum cross-section of
2
150 cm must be provided, or there must be an intercon-
nection with other rooms from where combustion air can
be freely drawn.
To minimise the noise development with open flue ope-
ration, pull the ventilation air hose from the burner.
B Install the volume flow terminal in accordance with
the installation instructions for the flue gas system.

3.5.1 Shaft cross-sections

DN Fem.
connection
80
110 128
Tab. 14 Dimensions for Fig. 4 shaft cross-sections
(dim. in mm)
3.6

Test port

Flue gas testing and the determination of the combusti-
on air temperature are restricted to the test ports.
Observe the information in the Logatop BE - RLU oil
burner instructions.
3.7

Terminal openings

If the ventilation air and flue gas system terminals are
beside each other, you must take measures to prevent
flue gases being drawn in again. You must keep to the
requirements of DIN 18160-1 (in particular those relating
to terminal design), as well as the requirements relating
to general building regulations approval for that system.
In addition, rainwater must not get into the ventilation air
pipe.
Please speak to your local flue gas inspector should you
have any questions regarding the design of the terminal
openings.
USER INFORMATION
Badly designed terminal openings can
lead to unsafe combustion and burner
faults.
14 Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.
A
95 130
188
B
120
168
Fig. 4 Shaft cross-sections
Fig. 5 Fitting balanced flue outlet
1 Ventilation air test port
2 Flue gas test port
1
Fig. 6 Samples of terminal designs
(dim. in mm)
1 Flue gas
2 Ventilation air
1
0.4
2 1
2
2