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Unscrew screw (1) fastening gas valve
supply connector
4.4.18 EXPANSION TANK DISASSEMBLY (C.A.I.-C.S.I. Version)
OPERATION SEQUENCE
18
• Disconnect the boiler from the electricity
supply
• Turn off the gas tap
18.1
Turn off heating system taps
18.2
Remove the case.
See procedure pag. 25
18.3
Empty the heating system
18.4
Remove upper crosspiece
unscrew screw (1)
18.5
Unscrew nut fastening (2) flexible ramp
-expansion tank
18.6
Unscrew the nut (3) fixing the lower
expansion tank crosspiece
18.7
Remove expansion tank
Work the other way round from the above for reassembly operations.
! !
Check the expansion tank charge P. 11 - Chap.2.1 Preliminary operations.
! !
MAKE FUNCTIONAL TESTS PAGES 65, 66 and 67.
! !
ITEM INVOLVED
WITH OPERATION
Heating system taps
Safety valve lever
N. 6 screws
N. 1 nut and N. 1 gland
N. 1 nut
Expansion tank
1
3
2
caldaie
TOOLS NEEDED FOR
THE OPERATION
No tools – by hand
No tools – by hand
Magnetic PH2 screwdriver
23mm wrench
23mm wrench
No tools – by hand
43
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