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DISCHARGE OF THE PRODUCTS OF COMBUSTION
The flue and the flue stack fitting must be made in compliance with the
standards and the legislation in force, using rigid pipes that are resistant
to high temperatures, condensate and mechanical stress, and are air-
tight. The flue stack must ensure the minimum negative pressure speci-
fied by the standards in force, considering "zero" pressure at the fitting to
the flue. Unsuitable or incorrectly sized flue stacks may increase the
noise produced due to combustion, generate problems involving con-
densation and negatively affect the combustion parameters. Non-insu-
lated flues are a source of potential danger. The joint seals should be
made using materials that can resist temperatures of at least 250°C.
Suitable points for measuring the flue gas temperature and analysing
the products of combustion must be prepared in the connection betwe-
en the boiler and the flue stack. As regards the cross-section and the
height of the chimney, refer to the national and local standards in force.
WATER CONNECTIONS
The MEGA boilers have the following fittings for the water connections:
T1 Central heating flow outlet
T2 Central heating return inlet
T3 Expansion vessel attachment
MEGA
92
107
T1-T2*
DN 50 DN 50 DN 50 DN 65 DN 65 DN 65 DN 65 DN 65 DN 80 DN 80 DN 80 DN 100 DN 100 DN 100 DN 100
T3
1" 1/4 1" 1/4 1" 1/4 1" 1/2 1" 1/2 1" 1/2 1" 1/2 1" 1/2
T4
3/4"
3/4"
T5 (Øe mm)
200
200
MEGA
T1-T2*
T3
T4
T5 (Øe mm)
* UNI 2278 PN16.
152 190 240
300
3/4"
3/4"
3/4"
3/4"
200
220
220
220
1250
1480
DN 125
DN 125
DN 80
DN 80
1" 1/2
1" 1/2
400
400
- 45 -
T4 Boiler drain
T5 Flue attachment
350 399 469 525
2"
2"
3/4"
3/4"
3/4"
3/4"
220
220
250
250
1890
2360
DN 150
DN 150
DN 100
DN 100
1" 1/2
1" 1/2
450
450
INSTALLATION
600
720 820
940 1060
2"
DN 65 DN 65 DN 65 DN 65
3/4"
3/4"
3/4"
3/4"
250
350
350
350
3000
3600
DN 200
DN 200
DN 125
DN 125
1" 1/2
1" 1/2
500
500
3/4"
350
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