Riello GITRE Series - System Filling and Emptying; Water Quality Requirements; Filling

22
INSTALLATION
2.10 System lling and emptying
GITRÈ boilers require a lling pipe connected to the central
heating circuit return pipe.
Turn the mains power switch OFF and turn the control panel
function selector to (0) before lling or draining the system.
2.10.1 Water quality requirements
The heat transfer uid (water) for the central heating circuit must
conform to the quality parameters given in the following table:
REFERENCE VALUES
pH 6-8
Electrical conductivity less than 200 μS/cm (25°C)
Chlorine ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
Alkalinity M less than 50 ppm
Total hardness less than 35°F
Sulphur ions none
Ammonia ions none
Silicon ions less than 30 ppm
If the hardness of the water exceeds the value specied in the
table, it is mandatory to install a water softening system.
9
Excessive water softening (leading to a total hardness < 15°F)
can cause corrosion in metal parts (pipes and boiler com-
ponents). Keep the electrical conductivity of the water un-
der 200 μS/cm.
0
Do not top up the central heating circuit on a frequent or
continuous basis as this can damage the boiler’s heat ex-
changer. The use of automatic topping up systems should
be avoided for this reason.
2.10.2 Filling
RI
− Make sure that the central heating drain cock (1) and
storage cylinder drain cock (2) (GITRÈ B/100 models) are
closed before you start lling the system.
− Open the non-return valve (3) (GITRÈ B/100 models only)
to facilitate lling (the slot in the screw must be perpen-
dicular to the direction of ow = horizontal)
GITRÈ
1
GITRÈ B/100
3
2
1