51
18.6
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.
18.6.1 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);
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. 18.48)
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);
4. Then 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
P2
P1
Fig. 18.51
Fig. 18.50
Fig. 18.52
Q1
Q2
Fig. 18.53
Summary of Contents for GENUS 30 Plus
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