39
Alpha InTec² 20SE and 30SE - Component Replacement
1 Boiler drain point
2 Gas valve
3 Condensate trap
4 System expansion vessel
5 Air / gas mixer
6 Primary temperature sensor
7 Manual air vent valve
8 Ignition / sensing electrode
9 Test points (air A) - (flue F)
10 Flue temperature sensor
11 Burner cover
12 Overheat thermostat
13 Primary heat exchanger
14 Fan
15 Primary pressure switch
16 Automatic air vent
17 Boiler pump
18 Safety valve (3 bar)
19 By-pass
20 Safety valve operation indicator
Fig. 7.1
1
7
6
10
11
12
13
14
15
16
17
18
19
20
2
3
8
5
8
9
F A
7 COMPONENT REPLACEMENT
To ensure correct and safe operation of the appliance, it is essential that any worn or failed components are replaced with
only genuine Alpha spare parts. Use of non-genuine Alpha spares could invalidate your warranty and may pose a potential
safety hazard.
It is the law that any service work must be carried out by a competent person, i.e. Gas Safe registered boiler engineer.
Warning: Before replacing any boiler components, isolate the electrical supply and close the boiler gas service cock. Allow
the boiler to cool.
Always test for gas tightness before and after replacing any gas carrying components or disturbing any gas connections.
Always carry out electrical system checks i.e. Earth Continuity, Resistance to Earth, Short Circuit and Polarity with a suitable
meter after servicing.
Check the operation of the boiler. (Refer to Sections 5.5 and 5.6). Ensure that all the controls are returned to their original settings.
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