Ariston HS C 24 FF NG Installation And Servicing page 64

Instructions for removing the housing and inspecting the
appliance.
Before carrying out any work on the boiler, switch off the power
supply using the external bipolar switch and close the gas tap.
To access the inside of the boiler:
- unscrew the two screws from the front panel (a), pull the panel
forwards and uncouple it from the upper pins (b),
- pivot the electronic unit by pulling it forwards (c),
- detach the two clips at the bottom of the combustion chamber
casing cover, pull the cover forwards and uncouple it from the
upper pins (d).
(a)
(b)
(c)
(d)