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caldaie
4.4.8 b BITHERMAL EXCHANGER ASSEMBLY (C.S.I. Version)
OPERATION SEQUENCE ITEM INVOLVED TOOLS NEEDED FOR
WITH OPERATION THE OPERATION
8 • Disconnect the boiler from the electricity
supply
• Turn off the gas tap
8.1 Turn off heating system taps Heating system taps No tools – by hand
8.2 Turn off the sanitary inlet tap Sanitary H2O inlet tap No tools – by hand
8.3 Remove the case.
See procedure pag. 25
8.4 Empty heating and sanitary system Safety valve lever+sanitary tap No tools – by hand
8.5 Remove air box cover Mag. PH2 screwdr.
removing the screws (1) and the clip (2) N. 2 screws and N. 2 clips and broad tipped screwd
8.6 Remove combustion chamber cover
removing the screws (3) N. 2 screws Mag. PH2 screwdriver
8.7 Remove upper clip fastening delivery
flexible ramp (4) N. 1 clip Long pliers
8.8 Remove upper part of flex ramp and
rotate under air box Flexible ramp No tools – by hand
8.9 Remove clip for heating return
flexible ramp (5) N. 1 clip Long pliers
8.10 Remove upper part of heating return
flexible ramp Flexible ramp No tools – by hand
8.11 Unscrew the nuts fastening sanitary
ramp-exchanger (6) N. 2 nut 24mm. wrench
8.12 Remove hood shaped at 90° from Limit
Thermostat Shaped hood No tools – by hand
8.13 Remove safety hood from NTC heating
probe Rubber safety hood No tools – by hand
8.14 Disconnect connector from heating
NTC probe Connector No tools – by hand
8.15 Take out exchanger from
its housing Exchanger No tools – by hand
8.16 Remove heating NTC probe from
exchanger .
See procedure pag. 33
8.17 Remove limit thermostat from bithermal
exchanger.
See procedure pag. 36
8.18 Remove flow limiter from
exchanger Flow limiter Broad tipped screwdriver
8.19 Remove the side sealings from
exchanger N. 2 side sealings No tools – by hand
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