QHT Riva Combi User manual and instructions - page 14
5. Instructions For Use Cont.
Adjustment:
•
In order to achieve optimal settings for
economy and comfort, we recommend
adjusting the operating temperature of
the central heating water according to
the outside temperature, positioning
the knob as in figure 5.6
•
Your installer may have installed
aditional energy saving equipment
and will be able to recommend the
most suitable adjustment for your
system.
• The temperature and pressure gauge
(Fig. 5.1 on page 12) will allow you to
check that the set temperature is
obtained.
Lower than
23 °F
From 41 to 59 °F
Between 23
and 41 °F
Figura 5.6
5.5 Domestic Hot Water Temperature:
• The temperature of the domestic hot
water (d.h.w.) leaving the boiler can
be varied from 100 °F to a maximum
of about 140 °F (Figure 5.7), by
turning the knob 8.
• The adjustment system integrated
within the boiler automatically controls
the flow of gas to the burner in order
to keep the temperature 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 normal to see a cycle of
lighting and extinguishing of the
burner when running.
Minimum
Maximum
8
Figure 5.7
Adjustment:
• It is advisable to adjust the d.h.w.
temperature to a level commensurate
with the demand, minimising the need
to mix with cold water. In this way, the
automatic control facilities will be fully
exploited.
• Where the amount of limescale
present in the water may be
particularly great not exceeding the
position in Fig. 5.8 of the d.h.w.
temperature control knob 8, minimises
annoying incidences of scale deposits
and clogging.
• However it is advisable to install a
small water treatment device or
softener. With such a device you
should avoid periodic descaling.
Minimum
8
OK
Figure 5.8
RIVA COMBI USER MANUAL – REV A
14