Biasi M110B.24SM/E, Руководство по обслуживанию, Страница: 6 / 44

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GENERAL ACCESS AND EMPTyING HyDRAULIC CIRCUITS
6 Remove the screws F and remove the control panel lid (Fig-
ure 2.5).
figure 2.5
E
f
f
2.4 Access to the sealed chamber
figure 2.6
G
G
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).
figure 2.7
H
I
H
- Bottom view of the boiler
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.
figure 2.8
J
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
k
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
1 Close the d.c.w. inlet cock I (Figure 2.7).
2 Open one or more hot water taps until the boiler has been
completely emptied.