Table of Contents
Advertisement
Useful advice
electrical mains, using the fused spur isolation
switch fitted adjacent to the appliance.
Safety lock--- out may occour even in case of an
blockage of the condensate drainage (e.g.
plugged drain pipe).
It is advisable to check the condensate drainage
pipe and traps for cleaness.
In case of persistent lock--- out call a competent
and responsible service engineer.
If noises due to air bubbles are heard during
operation...
you should check that the pressure on the tem-
perature and pressure gauge (Fig. 2.2 on page 4)
is not below the correct setting.
If required, top up the system correctly, as de-
scribed in the section 2.2 of this manual.
Bleed any air present in the radiators, if necessary.
If the pressure on the temperature and pres-
sure gauge (4 on page 2) has gone down...
it is necessary to top up the appliance with water
again, so as to raise the pressure to an adequate
level as described in the section 2.2 of this manual.
If topping up with water has to be done very fre-
quently, have the system checked for leaks.
If water comes out of the pressure relief valve
Check on the temperature and pressure gauge (4
on page 2) that the pressure in the central heating
circuit is not close to 3 bars. In this case, tempera-
ture rise in the circuit can cause the pressure relief
valve to open.
So that this does not happen and to decrease the
pressure to a normal value, it is advisable to vent
12
some of the water in the appliance through the
bleed valves present in the radiators.
If in time, a reduction in domestic hot water
supply is observed...
The likely causes may be impurities caught in the
domestic hot water flow switch filter or limescale
deposited in the domestic hot water heat ex-
changer. It is advisable to have the appliance
cleaned out by an Authorised Service Centre En-
gineer.
If water should occasionally leak from the
boiler...
shut off the valves positioned under the boiler
(Fig. 2.11 on page 7) and call an Authorised Ser-
vice Centre Engineer.
If the left appliance operation light 10 (Fig. 3.3)
flashes very quickly the boiler is detecting a
fault.
10
Fig. 3.3
In this case or in case of problems other than
those mentioned here, switch off the boiler, as
described in section 2.6 on page 6 and call a
competent and responsible service engineer.
Advertisement
Table of Contents
