17
22/01/09 - 300008281-001-E
GT 220 - GT 2200
3.
Installation
3.3 Chimney connection
Connection must comply with the prevailing local and national
regulations.
The high-performance features of modern boilers and their use in
specific conditions as a result of the advance in burner technology
(e.g. first-stage or low modulation range operation) lead to very low
flue gas temperatures.
For this reason:
- Use flue gas pipes designed to enable the flow of condensates
which may result from such operating modes in order to prevent
damage to the chimney.
- Install a draining tee at the bottom of the chimney.
- Install a draught moderator (recommended).
3.3.1
Flue size
The following table indicates per boiler model the minimum chimney
dimensions to be respected to ensure the draught required at the
nozzle.
* 1 Pa = 0.01 mbar
(1): Maximum boiler output
(2): Boiler temperature: 80 °C (Ambient temperature: 20 °C)
3.3.2
Connection to the flue gas pipe
The appliance must be installed in accordance with the Codes of
Practice using a leak proof pipe made of a material capable of
withstanding hot combustion gases and any acidic condensation.
The connection between the boiler nozzle and the chimney flue, with
a cross section equal to that of the nozzle, must be as direct and as
short as possible.
Boiler type
Output
Mass flue gas flow rate
(1) (2)
(13% CO
2
on fuel
oil)
Smoke temperature
(1)
(2)
(13% CO
2
on fuel
oil)
Chimney: Minimum
recommended
dimensions
Min Ø
Height
kW
Kg/h
°C
mm
m
GT 224
40-50
83
< 195
150
5
GT 225
50-64
106
< 195
150
5
GT 226
64-78
129
< 195
180
5
GT 227
78-92
152
< 205
180
5
GT 228
92-100
166
< 205
180
5
Boiler type
Smoke nozzle
Ø
A
GT 224 - GT 225
Ø 153
GT 226 - GT 227 - GT 228
Ø 180
A