Technical information

Table Of Contents

18.6 Access to the Water Circuit

Important ! Before any component is removed (except the 3

ay valve motor), the boiler must be drained of all water.

18.6.1 Drain down

For the primary circuit :

1. Carry out step 18.2.1 ;

2. Open the pressure relief valve (on the pump) (see Fig. 18.47)

or the drain screw “P1” on the right hydraulic block (see

Fig.18.48)

;

or 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. 18.48)

To drain the tank more quickly remove the cap on the tank

(see Fig. 18.49);

Important!! Take care when removing the cap to drain the

cylinder

18.6.2 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. 18.50)

;

3. Remove the two screws “Q2” (see Fig. 18.51);

hen pull up the three way valve shutter

(

see Fig. 18.52);

5. Reassemble in reverse order.

Fig. 18.48

Fig. 18.47

Fig. 18.49

Fig. 18.51

Fig. 18.50

Fig. 18.52

Fig. 18.53