Access To The Water Circuit; Drain Down; Removing The 3 Way Valve - Ariston GENUS HE 35 Plus Installation And Servicing Instrucnion

18.5

Access to the Water Circuit

Important ! Before any component is removed (except the 3
way valve motor), the boiler must be drained of all water.

18.5.1 Drain down

For the primary circuit :
1. Carry out steps 18.2.1 & 18.2.2;
2. Open the pressure relief valve (on the pump) (see Fig.
18.50) or the drain screw "P1" on the right hydraulic block
(see Fig.18.51);

18.5.2 Removing the 3 way valve

1. Carry out steps 18.2.1 and 18.2.2 ;
2. Remove the clip "Q1" and the three way valve motor
(see Fig.18.53);
4. Then pull up the three way valve shutter (see Fig.18.55).
5. Reassemble in reverse order.
54
Important!! Take care when removing the cap to drain the cylinder
Fig. 18.50
Q1
Fig. 18.53
Fig. 18.55
For the D.H.W. circuit :
1. Close the water inlet tap;
2. Open a D.H.W. hot water tap;
3. Open the drain screw "P2" on the boiler (see Fig. 18.51)
To drain the tank more quickly remove the cap on the
tank (see Fig. 18.52);
P2
P1
Fig. 18.51
3. Remove the two screws "Q2" (see Fig.18.54);
Fig. 18.52
Q2
Fig. 18.54