Riello 20120391, Инструкции для установщика и технической поддержки

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INSTALLATION
INSTALLATION
2.10 Filling and emptying the system
It is necessary to equip
R
NXC-NXH devices with a charging
system.
Before carrying out any filling or emptying operations
of the system, set system main switch and
equipment switch to "OFF".
ON
OFF
ON
OFF
The system's cold charging pressure must be between 1.2 and
1.5 bar.
2.10.1 Water quality requirements
Water is used as a heat transfer fluid within the heating/cool-
ing system.
The quality of the water utilized must be compliant with the
requirements indicated in the UNI 8065 standard, otherwise an
appropriate treatment system must be installed.
REFERENCE VALUES
PH 6-8
Electrical conductivity less than 200 mV/cm (25°C)
Chlorine ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
M Alkalinity less than 50 ppm
Total hardness less than 25 °F
Sulphur ions none
Ammonium ions none
Silicon ions less than 30 ppm
If the hardness of the initial water exceeds the value indicated
in the table, a water softening system must be utilized.
9
Excessive water softening (total hardness <15 °F) could re-
sult in corrosion phenomena wherever contact is made
with metallic elements (pipes or boiler components). The
conductivity value must also be kept within 200 µS/cm.
0
It is forbidden to frequently or continuously top-up the sys-
tem, as this could damage the equipment heat exchanger.
2.10.2 Charging the system
Before starting the charging operation check that:
− discharge valve is closed
− system's air vents are open
− water system's shut-off devices are open.
Afterwards:
− slowly charge the system
− close the system's air vents as soon as water starts to
come out
− check that the system's cold charging pressure reaches a
value of approx. 1.2 to 1.5 bar.
9
After few hours of operation and few turning on / off cy-
cles, check the pressure and reintegrate it if lower than 1
bar. Reintegration must be carried out with machine off
(pump off).
2.10.3 Emptying the equipment
The
R
NXC-NXH devices are equipped with an internal dis-
charge valve (1). To reach the discharge valve (1) remove part of
the panelling as described below.
1