87
IT
ES
PT
GB
RUS
potentiometer (
) with working range
30÷60°C.
– The C.H. temperature can be adjusted
by turning the knob of the C.H. potentio-
m e t e r
(
) w i t h w o r k i n g r a n g e
20÷75°C.
If the temperature of the C.H. return
water is lower than around 55° C, con-
densation of the combustion by-products
is obtained, further increasing the effi-
cency of thew thermal exchange.
TURNING THE BOILER OFF
(fig. 27)
To turn the boiler off place the selector
knob on the “
OFF”
position.
If the boiler is not going to be used for
a lengthy period it is advised to turn off
the electricity supply, close the gas tap,
and if the temperatures foreseen are
low, empty the boiler and the hydraulic
system to avoid breakage in the tubes
due to the freezing of the water.
GAS CONVERSION
Should it be necessar y t o conver t the
appliance to a different gas from the one
for which the boiler has been equipped,
approach the technical staff.
CLEANING AND MAINTENANCE
Preventive maintenance and checking of
the efficient operation of the equipment
and safety devices must be carried out
exclusively by the authorized technical
staff. The boiler is supplied with an elec-
tric cable. Should this require replace-
ment, contact exclusively with the autho-
rized technical staff.
FAULT FINDING
–
Ignition lock-out, 100°C safety stat or
smoke stat intervention
(fig. 29)
If the burners do not ignite, the red led
will light-up (
).
To attempt a boiler restart, rotate the
selector knob to position (
) and relea-
se it immediately, placing it in the sum-
mer (
) or winter (
) operation
position.
If the boiler lock-out re-occurs, contact
an authorised Service Centre.
Fig. 28
Led rosso acceso
Fig. 29
Red led on
Summary of Contents for FORMAT DEWY.zip 25 BF
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