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Normally, the result of the comparison between these two signals
directly operates the fan speed adjusting the useful output gen-
erated in order to stabilize the temperature of the exiting water.
If during the d.h.w. mode operation, the temperature of the pri-
mary circuit goes over 90°C, the useful output is automatically
reduced so that the primary circuit cannot reach excessive tem-
peratures.
The control sequences in function
illustrated in detail in sections 9.7 and 9.8.
9 .4 setting the boiler control function modes
It is possible to select the various boiler control function modes
hereafter named "parameters" by using the keys of the control
panel p.c.b.
figure 9 .5
1 To enter in the parameters setting mode press contemporary
the 3 keys (A - B - C Figure 9.5) for 10 seconds at the same
time until p01 are displayed on the display, indicating the en-
try in the "parameter 01" and the value of parameter (Figure
9.5 - Figure 9.6).
figure 9 .6
2 To change the parameters press c.h. set keys (D or E Figure
9.7) see also Tab 9.1.
- 22 -
MAIN ElEctroNIc coNtrol/IgNItIoN p.c.b.
and
in function are
a
b
c
d
e
figure 9 .7
3 To memorize the setting press the key B (Figure 9.8).
figure 9 .8
4 The setting is confirmed by the visualization of OK and then
the display shows the value of changed parameter (Figure
9.9).
figure 9 .9
5 To exit from setting without modifing the set press the
keys (A or C) till the visualization of parameter p 01 show-
ing the lighting value before the setting (Figure 9.10).
b
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