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Fig. 2.9
In these cases, however, it is advisable to
install a small water treatment device or sof-
tener. With such a device you should avoid
periodic descaling.
Consequently, the d.h.w. heat exchanger will
keep its performance consistent for a longer
period of time with resulting gas savings.
If the demand for d.h.w. is so great as to pre-
vent reaching a high enough temperature,
have the appropriate output limiting valve
installed by your installer or an Authorised
Service Engineer.
2.6
Extinguishing
To turn the boiler off set the function selector
8 to the position shown in Fig. 2.10.
The appliance operation light 10 will flash
every 4 seconds.
10
Fig. 2.10
When you do not expect to use the boiler for
a long period:
• Switch off the electricity supply to the boil-
er, by means of the fused spur isolation
INSTRUCTIONS FOR USE
8
switch.
• Shut off the gas supply cock 14 and the
valves for the water circuits fitted under the
boiler (Fig. 2.11).
• Empty the water circuits, if necessary,
as shown in section General access and
emptying hydraulic circuits in the service
manual.
14
Closed position
Fig. 2.11
2.7
Built in time switch A
The boilers are equipped with a built in elec-
tronic time switch (5, Fig. 1.3 on page 8)
which controls the c.h. operation.
G
F
E
Fig. 2.12
Display and control panel:
A Mode selector switch
B Reset button
C Enter button
D
C
B
- 13 -
H
A
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