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18.3 Access to the Water Circuit
Important! Before any component is removed, the boiler must be drained of all water.
18.3.3 Removing the float of the flow switch
18.3.1 Drain down
DHW : close the DHW inlet tap and open a tap on the installation / CH : Close the flow and return isolating valve and
open the pressure relief valve.
18.3.2 Removing the 3 way valve
P1
P3
P2
Q1
Q2
Q3
Q4
Fig. 86
Fig. 81
Fig. 83
Fig. 84
Fig. 85
Fig. 82
Fig. 87
Fig. 88
Fig. 89
Q5
Q6
Q7
*
See the
paragraph
18.3.1 before
removing the
clips.
1. Carry out steps 18.1.1 and 18.1.2;
2. Disconnect the flow switch reed relay “P1”;
3. Remove the clip “P2” and the 3 way valve motor (see Figs. 81 and 82);
4. Remove the clips “Q1”“Q2”“Q3”“Q4” (see Figs. 83 to 84) and the two screws “P3”
(Fig. 86);
5. Remove the 3 way valve body by pulling it toward you (see Fig. 87);
6. Reassemble in reverse order;
1. Disconnect the flow switch reed relay “P1” (see Fig. 81);
2. Remove the clips “Q5” and “Q6” (see Fig. 81);;
3. Remove the clip “Q5” (see Figs. 88 & 89);
4. Pull down the cap and catch the float (see Figs. 88 & 89);
5. Reassemble in reverse order;
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