8
General information
1.7 WATER TREATMENT
Treating the supply water allows you to prevent
problems and maintain the functionality and
efficiency of the generator over time.
Th
e ideal pH value of the water in the central heating
system must be:
VALUE
MIN
MAX
PH
6,5
8
HARDNESS (°fr)
9
15
To minimise corrosion, it is essential to use a corrosion
inhibitor. In order for it to work
efficien
tly, the metal
surfaces must be clean.
ATTENTION!
Any damage caused to the boiler, due to the formation
of build-up or corrosive water, will not be covered by
the warranty.
ATTENTION!
The models only equipped with central heating are
NOT suitable for hot water production for human
consumption (M.D. 174/2004).
1.8 BOILER FROST PROTECTION
Activated by default
Thi
s protection only cuts in when the electric and gas supply are present.
If the electric or gas supply are disconnected and 11 (SM) detects a
temperature of between 2 and 5°C when the supply is restored, the
appliance responds as indicated in the table below, in pos.2.
Antifreeze products with an inhibitor for central heat-
ing systems (spe
cific
for multimetal) can be used to
ensure
efficien
t protection of the central heating against
freezing.
Do not use antifreeze products for car engines since
these can damage the water gaskets.
POS
ANTIFREEZE FUNCTION
Supply
11 - SR (*)
Status of antifreeze
function
Actions
Electric
Gas
1
ON
ON
< 7°C
ON
Burner and Pump ON until T > 15°C
2
ON
OFF
< 5 ÷ 5°C
OFF
INDICATION OF FAULT CODE 16
(see Par. 4.4 ERROR CODES).
Ignition inhibited.
OFF
ON
OFF
Ignition inhibited.
OFF
OFF
OFF
Ignition inhibited.
(*) SR sensor, see Par. 2.2
