Ignition; Circuit Temperature - Biasi RIVA PLUS M90D.24S User Manual And Installation Instructions

Instructions for use
2.3

Ignition

1 Check that the valves located in the lower part
of the boiler are open (Fig. 2.3).
Open position
Fig. 2.3
2 Turn on the electricity supply to the boiler,
switching on the fused spur isolation switch.
The appliance operation light 10 (Fig. 2.4) will
flash every 4 seconds (stand--- by condition).
3 If the boiler is to be used for c.h. and d.h.w posi-
tion the function selector 8 as in Fig. 2.4.
(combi) or in Fig. 2.5 (c.h. only).
The appliance operation light 10 will flash
every 2 seconds (operating boiler).
10
Fig. 2.4
10
Fig. 2.5
4 If d.h.w. supply only is required (combi), posi-
tion the function selector 8 as in Fig. 2.6.
4
The appliance operation light 10 will flash
every 2 seconds (operating boiler).
10
Fig. 2.6
2.4 C.h. circuit temperature
The output temperature of c.h. water is adjustable
from a minimum of about 38°C to a maximum of
about 85°C (Fig. 2.7), by turning the function se-
lector (8).
Adjustment of c.h. output on the boiler is auto-
matic. The greatest output pre--- set in the factory
can, however, be reduced in level according to
actual system requirements; this does not affect
the maximum output in d.h.w. operation.
Such adjustments must be carried out by a quali-
fied person; therefore we advise you to contact
8
your installer or Service Agent.
Adjustment of the boiler temperature alters the
gas flow at the burner according to the thermal de-
mand in the system. So it is usual to see the burner
lit at the minimum level for more or less long
periods.
Minimum
8
Maximum
Fig. 2.7
8