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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.
18.3.1 Drain down
Close the flow and return isolating valve and open the pressure relief valve.
18.3.2 Removing the 3 way valve
1. Carry out step 1.2.1 and 1.2.3;
2. Remove the clip “Q1” from the by-pass tube (see fig. 87);
3.Remove the clip “Q2” and “Q3” from the heating return and the pump (see fig. 88 & 89);
4. Remove the two T25 screws “P1” (see fig. 87);
5. Remove the 3 way valve body pulling it toward you (see fig. 90);
6. Reassemble in reverse order;
P1
Q3
Q2
Fig. 86
Fig. 89
Fig. 90
fig. 91 fig. 92
R
1. Carry out step 1.2.1 and 1.2.3;
2. Unscrew the two CHC screws
“R”(see fig. 91);
3. Remove the 3 way valve shutter
pulling it up (see fig. 92) 4. Reassemble in reverse order;
18.3.3 Removing the 3 way valve shutter
Fig. 87
Fig. 88
Q1