- 15 -
USE
INSTRUCTIONS FOR USE
Adjusting the c.h. temperature with the
external temp. probe installed
When the external temp. probe (optional) is
installed your boiler automatically adjusts the
temperature of the c.h. system water fl ow in
relation to the external temperature.
In this case the boiler must be set by a quali-
fi ed installer ( see "Setting the K coeffi cient
of the external temperature probe" to page
59 ).
However, if the ambient temperature is not
comfortable, the fl ow temperature of the
heating plant can be increased or reduced
by ± 15°C by acting on keys 16 (reduce)
and 17 (increase) ( Fig. 2.7 ).
D.h.w. temperature
2.5
The temperature of the d.h.w. can be ad-
justed by acting on keys 13 (increase) and
14 (reduce) ( Fig. 2.7 ) from a minimum of
about 35°C to a maximum of about 60°C.
Press one of the two keys once to display
the "set" value. Press again to access the
modifi cation.
Signal given by the LCD display:
the "set" value of the d.h.w. and the
•
symbol fl ash. The background of the dis-
play is illuminated. ( Fig. 2.9 ).
Fig. 2.11
°C
Adjustment
Adjust the d.h.w. temperature to a value
suited to your needs.
Reduce the necessity of mixing hot water
with cold water.
In this way, the automatic adjustment fea-
tures will be appreciated.
If water hardness is particularly high, we
recommend that the boiler be adjusted to a
temperature less than 50°C.
In these cases we recommend however that
a softener is installed on the d.h.w. system.
If the maximum d.h.w. fl ow rate is too high,
such that does not allow the suffi cient tem-
perature to be reached, have a suitable fl ow
rate limiter installed by the Authorised Serv-
ice Engineer.
D.h.w. request
When the boiler has a power request in the
d.h.w. mode, the
symbol is displayed on
the display followed by an increase of the
heating water fl ow temperature. The
symbol fl ashes ( Fig. 2.12 ).
Fig. 2.12
°C
Extinguishing
2.6
Press the key for 2 seconds 15 ( Fig. 2.13 )
until the
symbol appears on the dis-
play ( Fig. 2.14 ).
