Access To The Sealed Chamber; Emptying The Primary Circuit; Emptying The D.h.w. Circuit - Biasi RIVA ADVANCE HE M110B.24SM/C Service Manual

GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS
5 Remove the screws E and remove the service panel (Figure 2.5);
6 Remove the screws F and remove the control panel lid (Fig-
ure 2.5).
f
e
figure 2 .5

2 .4 access to the sealed chamber

figure 2 .6
To gain access to the parts contained in the sealed chamber it is
necessary to remove the lid of the sealed chamber. For this pur-
pose, remove the front and side panels of the case, remove the
screws G as indicated in Figure 2.6 and remove the lid.

2 .5 emptying the primary circuit

1 Close the c.h. circuit flow and return cocks fitted by the in-
staller.
2 Remove the front and right panels of the boiler.
3 Open the drain tap I (Figure 2.8 combi or Figure 2.9 only c.h.)
until the boiler is completely emptied.
4 To help the draining of the primary circuit loose the condens-
ing heat exchanger air purger valve H (Figure 2.7).
- 6 -
f
figure 2 .7
attention: some water could remain in the condensing heat
exchanger .
5 Close drain tap once the emptying has been completed.
G
figure 2 .8
G
figure 2 .9
2 .6 emptying the d .h .w . circuit
figure 2 .10
1 Close the d.c.w. inlet cock J (Figure 2.10).
2 Open one or more hot water taps until the boiler has been
h
completely emptied.
i
i
J