Gas Connection; Electrical Connections; Fume Ducts - Ferroli BLUEHELIX 25 K 50 Instrucciones De Uso, Instalación Y Mantenimiento

BLUEHELIX 25 K 50
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.

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 is damaged, turn
the unit off and have the cable replaced exclusively by professionally qualified
personnel. In case of replacement, use exclusively "HAR H05 VV-F" 3x0.75
mm2 cable with maximum ext. diameter of 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 di-
rect connection from the mains or with batteries, depending on the type of de-
vice.
Accessing the electrical terminal block
The electrical terminal block (fig. 14) can be accessed after removing the front panel (***
'Opening the front panel' on page 39 ***). The arrangement of the terminals for the vari-
ous connections is also given in the wiring diagram in fig. 29.
72
139
fig. 14 - Accessing the terminal block

3.6 Fume ducts

Important
The unit is "type C" with sealed chamber and forced draught; the air inlet and fume outlet
must be connected to one of the following extraction/suction systems. Before installation,
check and carefully observe the above prescriptions. Also, comply with the provisions
concerning the positioning of wall and/or roof terminals and the minimum distances from
windows, walls, vents, etc.
Connection with coaxial pipes
fig. 15 - Examples of connection with coaxial pipes (
Table. 2 - Typology
Type
C1X
C3X
For coaxial connection, fit the unit with one of the following starting accessories. For the
wall hole dimensions, refer to the figure on the cover. Any horizontal sections of the fume
exhaust must be kept sloping slightly towards the boiler, to prevent any condensate from
flowing back towards the outside and causing dripping.
Table. 3 - Max. length of coaxial pipes
Max. permissible length
(horizontal)
Max. permissible length
(vertical)
Reduction factor
90° bend
Reduction factor
45° bend
Connection with separate pipes
A 138
fig. 17 - Examples of connection with separate pipes (
Table. 4 - Typology
1 2 3 4
Type
C1X
C3X
C5X
C6X
B2X
For the connection of separate ducts, fit the unit with the following starting accessory:
= Air / = Fumes)
cod. 3541H130 - Rev. 00 - 09/2015
Description
Wall horizontal exhaust and inlet
Roof vertical exhaust and inlet
Ø 100 Ø 127
Ø 60 Ø 80
041002X0 041006X0
fig. 16 - Starting accessory for coaxial ducts
BLUEHELIX 25 K 50
C
5x
Description
Wall horizontal exhaust and intake. The inlet/outlet terminals must be concentric or close enough to be
undergo similar wind conditions (within 50 cm)
Roof vertical exhaust and intake. Inlet/outlet terminals like for C12
Wall or roof exhaust and intake separate or in any case in areas with different pressures. The exhaust
and intake must not be positioned on opposite walls.
Intake and exhaust with separately certified pipes (EN 1856/1)
Intake from installation room and wall or roof exhaust
IMPORTANT - THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION
Ø 81
041039X0
fig. 18 - Starting accessory for separate ducts
041001X0
Coaxial 60/100 Coaxial 80/125
BLUEHELIX 25 K 50
7 m
28 m
8 m
1 m 0.5 m
0.5 m 0.25 m
B C
2x 1x
= Air / = Fumes)
Ø 81
EN
3