Emptying The Primary Circuit; Emptying The D.h.w. Circuit - Biasi Advance Plus 25C ERP Service Manual

GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS
Figure 2 .9

2 .5 Emptying the primary circuit

1 Close the C.H. circuit flow and return cocks "G" (Figure 2.10).
H
Figure 2 .10
2 Remove the front and right panels of the boiler.
3 Loosen the central heating drain cock "I" (Figure 2.11) until
the boiler is completely emptied.
Figure 2 .11
4 To make draining easier, lift the plug "J" of the automatic relief
valve in Figure 2.12.
G
CLOSED
OPEN
I
Figure 2 .12
2 .6 Emptying the D .H .W . circuit
1 Close the D.H.W. inlet cock "H" (Figure 2.10).
2 Open one or more hot water taps until the boiler has been
completely emptied.
J
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