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

GENERAL ACCESS AND EMPTyING HyDRAULIC CIRCUITS
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

G
G
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 H. (Figure 2.7).
H
figure 2.7 - Bottom view of the boiler
- 6 -
2 Remove the front and right panels of the boiler.
3 Open the drain tap J (Figure 2.8) until the boiler is completely
emptied.
f
figure 2.8
4 To help the draining of the primary circuit loose the condens-
ing heat exchanger air purger valve K (Figure 2.9).
figure 2.9
Attention: some water could remain in the condensing heat
exchanger.
5 Close drain tap once the emptying has been completed.

2.6 Emptying the d.h.w. circuit

I
1 Close the d.c.w. inlet cock I (Figure 2.7).
H
2 Open one or more hot water taps until the boiler has been
completely emptied.
J
k