Instructions for use
5
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.
The appliance operation light 10 will flash
every 2 seconds (operating boiler).
8
10
Fig. 2.4
4 If d.h.w. supply only is required, position the
function selector 8 as in Fig. 2.5.
The appliance operation light 10 will flash
every 2 seconds (operating boiler).
8
10
Fig. 2.5
2.4
C.h. circuit temperature
The output temperature of c.h. water is adjustable
from a minimum of about 25
°
C to a maximum of
about 85
°
C (Fig. 2.6), by turning the knob (8).
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.
It is possible to fit to this boiler an optional outside
temperature sensor which helps to manage and
control the boiler and system efficiency. The fol-
lowing instructions indicate how to set the output
temperature of the c.h. water depending on
whether the optional outside sensor has been
fitted.
Minimum
Maximum
Fig. 2.6
Adjustment WITHOUT the external tempera-
ture probe (optional) fitted
In order to achieve optimal settings for economy
and comfort, we recommend adjusting the oper-
ating temperature of the c.h. water according to
the outside temperature, positioning the knob as
follows:
USE
