Ariston GENUS HE 35 Plus, Installation And Servicing Instrucnion

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18.5.11 Removing the heating expansion vessel
1. Carry out step 18.2.1 ;
2. Remove the screw “ U1 ” (see Fig.
18.72);
Fig. 18.69
18.5.10 Removing the pump
1. Carry out step 18.2.1 ;
2.
Open the electrical box cover as in
step 18.3.1 (Fig. 18.6);
3. Remove the pump plug from the
control board and earth plug from
earth socket “ T1 ” (see Fig. 18.69);
4. Remove the pressure relief valve 3
bar as in step
18.6.5
;
5. Unscrew the pump nut “ T2 ” and
remove the two clips “ T3 ” on the
pump volute (see Fig. 18.70);
T3
T2
T3
3.
Pull the expansion vessel toward
you and remove the nut “ U2 ” with a
No.17 spanner (see Fig. 18.73);
4. To ensure the easiest access to the
hydraulic parts, hang the expansion
vessel on the chassis without
removing the nut (see Fig. 18.74);
5. Reassemble in reverse order.
Fig. 18.72 Fig. 18.73 Fig. 18.74
U1
U2
Fig. 18.75 Fig. 18.76 Fig. 18.77
18.5.12 Removing the D.H.W. expansion vessel
1. Remove the casing as in step 18.2.1 ;
2. Remove the nut “ V1 ” with a No.24
spanner (see Fig. 18.75);
3. Remove the “Pal” nut 1/2 “ V2 ” with a
No.34 spanner (see Fig. 18.76);
4.
Pull up the expansion vessel and
unscrew the second “Pal” nut (see
Fig. 18.77);
5. Reassemble in reverse order.
V2
V1
6.
Pull the pump toward you and
remove the clip
“ T4 ”
securing the
pressure gauge
(see Fig. 18.71 );
7.
Reassemble in reverse order.
T4
Fig. 18.70
Fig. 18.71
T1