Slant/Fin VSL-160B, Installation Instructions Manual

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14 - MAINTENANCE
14.9 - 3-way valve
removal (only for
160-C model)
The 3-way valve, details “M” and “Q”
in Figures 14-6 and 14-7, directs hot
water produced by the primary heat
exchanger to the heating circuit or to
the secondary heat exchanger for the
production of D.H.W. To replace or
clean it, follow the steps below while
referring to Figures 14-6 and 14-7:
1. follow the steps in Section 14.10
and 14-11 to isolate and drain the
water from the boiler;
2. follow the steps in Section 14.2,
to gain access the internal
components;
3. disconnect fi ttings “A”;
4. remove screws “C”;
5. rotate “D” fl ange in the direction of
the black arrow (See particular fi g.
1);
6. remove the bracket “E”;
5. remove fi tting “F”;
6. remove fi tting “L”;
7. remove fi tting “M” and check its
state.
8. remove spring “N”;
9. remove servomotor “O”;
10. remove the fi tting “P”
11. remove the spring “Q” and check
for any dirt.
Figure 14-6 Supply fi ttings removal (only for
160-C model)
Figure 14-7 3-way valve servomotor removal