Emptying The Primary Circuit - Biasi ADVANCE 15OV Service Manual

GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS
Main electronic p .c .b . lid removal
To get access to the main electronic p.c.b.:
5 Pull the box that contains the electronic p.c.b. and rotate it
(Figure 2.8).
Figure 2 .8
6 Remove the terminal block lid "F" (Figure 2.7).
7 Free the hooks placed on the three sides indicated and rotate
the lid towards left (Figure 2.9).
Figure 2 .9
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2 .5 Emptying the primary circuit

1 Isolate the cold feed to the F&E tank, also if fitted isolate the
heating circuit flow and return valves.
2 Remove the front and right panels of the boiler.
3 Loosen the central heating drain cock "G" (Figure 2.10) until
the boiler is completely emptied.
Figure 2 .10
OPEN
CLOSED
G