Ferroli BLUEHELIX TECH A Instructions For Use, Installation And Maintenance page 46

Antifreeze system, antifreeze fluids, additives and inhibitors
When necessary, antifreeze fluids, additives and inhibitors can be used only if the man-
ufacturer of such fluids or additives guarantees that they are suitable and do not cause
damage to the exchanger or other components and/or materials of the boiler and system.
Do not use generic antifreeze fluids, additives or inhibitors that are not specific for use in
heating systems and compatible with the materials of the boiler and system.
Water system characteristics
In the presence of water harder than 25° Fr (1°F = 10ppm CaCO
water in order to avoid possible scaling in the boiler.
Antifreeze kit for outdoor installation (optional)
In case of installation outdoors in a partially protected place for temperatures lower than
-5°C and down to -15°C, the boiler must be equipped with the antifreeze kit to protect the
tap water circuit and air trap. The kit comprises a thermostat, electric heaters and a heat-
er for the air trap. Connect the kit to the electronic card and install the thermostat and
heaters on the tap water pipes as directed in the instructions attached to the kit.
Connection to a storage tank for domestic hot water production
The unit's electronic board is arranged for managing an external storage tank for domes-
tic hot water production. Make the plumbing connections according to the diagram of
fig. 14. Make the electrical connections as shown on the wiring diagram in fig. 31. It is
necessary to use the kit code 1KWMA11W. At the next lighting, the boiler's control sys-
tem recognises the presence of the hot water tank probe and is automatically configures
the DHW function, activating the display and relevant controls.
8
95
9
10 209
fig. 14 - Connection to external hot water tank diagram
8 Domestic hot water outlet
9 Cold water inlet
10 System delivery - Ø 3/4"
11 System return - Ø 3/4"
95 Diverter valve
209 Hot water tank delivery - Ø 3/4"
210 Hot water tank return - Ø 3/4"
46
EN
), use suitably treated
3
210 11
cod.
BLUEHELIX TECH A
3.4 Gas connection
B
Before making the connection, ensure that the unit is arranged for operation
with the type of fuel available.
The gas must be connected to the relevant connection (see fig. 13) in conformity with the
current standards, using a rigid metal pipe or a continuous surface flexible s/steel tube
and installing a gas cock between the system and boiler. Make sure all the gas connec-
tions are tight.
3.5 Electrical connections
B
The unit must be connected to an efficient earthing system in accordance with
the current safety standards. Have the efficiency and suitability of the earthing
system checked by professionally qualified personnel; the Manufacturer de-
clines any liability for damage caused by failure to earth the system.
The boiler is prewired and provided with a "Y" type cable (without plug) for con-
nection to the electric line. The connection to the mains must be permanent and
have a bipolar switch with contact gap of at least 3 mm, interposing fuses of
max. 3A between the boiler and the line. Make sure to respect the polarities
(LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green wire) in the
connections to the electric line.
B
The power cable must not be replaced by the user. If the cable gets damaged,
switch off the unit and have it changed by professionally qualified personnel. If
replacing the power cable, only use "HAR H05 VV-F" 3x0.75 mm2 cable with
max. external diameter 8 mm.
Room thermostat (optional)
B
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE
CONTACTS. CONNECTING 230V TO THE ROOM THERMOSTAT TERMI-
NALS WILL PERMANENTLY DAMAGE THE PCB.
When connecting a time control or timer, do not take the power supply for such
devices from their cutoff contacts. Their power supply must be taken with a direct
connection from the mains or with batteries, depending on the type of device.
Accessing the electrical terminal block
After removing the front panel ( *** 'Opening the front panel' on page 49 ***) it is possible
to access the electrical connections terminal block (fig. 15). The layout of the terminals
for the various connections is also given on the wiring diagram in fig. 31.
72
139
fig. 15 - Accessing the terminal block
155
138
10kOhm
1.8kOhm
A
1 2 3 4 5 6