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• Close the valves and remove the filling loop.
If you experience any difficulty with the
operation of the boiler, switch off the
boiler immediately at the fused spur iso-
lation switch and contact your Installer
or an approved Service Engineer.
Air introduced into the boiler during this fill-
ing process will vent through the automatic
air purger fitted to the boiler. You may also
find it necessary to vent air from your radia-
tor circuit using your radiator key, however
be aware that excessive venting will cause
the pressure in the system to drop.
Always ensure that the pressure gauge is
set at the required pressure.
2.3
Ignition
• Check that the valves located in the lower
part of the boiler are open Fig. 2.3.
Open position
Fig. 2.3
• Turn on the electricity supply to the boil-
er switching on the fused spur isolation
switch. The appliance operation light 10
(Fig. 2.4) will flash every 4 seconds (stand-
by condition).
• If the boiler is to be used for c.h. and d.h.w,
position the function selector 8 as in Fig.
2.4. The appliance operation light 10 will
INSTRUCTIONS FOR USE
flash every 2 seconds (operating boiler).
10
Fig. 2.4
• 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 eve-
ry 2 seconds (operating boiler).
10
Fig. 2.5
2.4
C.h. circuit temperature
The output temperature of c.h. water is ad-
justable from a minimum of about 40°C to a
maximum of about 85°C (Fig. 2.6), by turn-
ing the knob 8.
Adjustment of the boiler temperature alters
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.
The following instructions indicate how to
set the output temperature of the c.h. water
depending on the outside temperature.
8
8
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