Temperature - Biasi Riva Plus HE M296.24SM User Manual And Installation Instructions

the gas flow at the burner according to the
thermal demand in the system. So it is usual
to see the burner lit at the minimum level for
more or less long periods.
Minimum
Maximum
Fig. 2.6
Adjustment
In order to achieve optimal settings for econ-
omy and comfort, we recommend adjusting
the operating temperature of the c.h. water
according to the outside temperature, posi-
tioning the knob as follows:
From 5 to 15 °C
Fig. 2.7
Your qualified installer will be able to recom-
mend the most suitable adjustment for your
system.
The temperature and pressure gauge (4,
Fig. 1.3 on page 8) will allow you to check
that the set temperature is obtained.
2.5 D.h.w. temperature
The temperature of the d.h.w. leaving the
- 12 -
INSTRUCTIoNS FoR USE
between
- 5 and +5 °C
lower
than - 5 °C
boiler can be varied from a minimum of about
35°C to a maximum of about 55°C (Fig. 2.8),
by turning the temperature control knob 9.
Minimum
Maximum
Fig. 2.8
Adjustment of the d.h.w. temperature is com-
pletely separate from that of the c.h. circuit.
The adjustment system integrated within the
boiler automatically controls the flow of gas
to the burner in order to keep the tempera-
ture of d.h.w. delivered constant, between
the limits of maximum and minimum output.
Where the demand is at a low level or with
the temperature set to the minimum, it is nor-
mal to see a cycle of lighting and extinguish-
ing of the burner when running.
Adjustment
It is advisable to adjust the d.h.w. tempera-
ture to a level commensurate with the de-
mand, minimising the need to mix with cold
water. In this way, the automatic control fa-
cilities will be fully exploited.
Moreover, where the amount of limescale
present in the water may be particularly
great, not exceeding the position in Fig. 2.9
of the d.h.w. temperature control knob 9 cor-
responding to about 50°C (Fig. 2.9),mini-
mises annoying incidences of scale deposits
and clogging.