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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 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 36 ***) . The arrangement of the terminals for the var-
ious connections is also given in the wiring diagram in fig. 30.
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
Description
C1X
Wall horizontal exhaust and inlet
C3X
Roof vertical exhaust and inlet
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 possible condensate
from flowing back towards the outside and causing dripping.
38
EN
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
Type
1
2
3
4
C1X
C3X
C5X
C6X
B2X
For the connection of separate ducts, fit the unit with the following starting accessory:
= Air /
= Fumes)
Before installation, make sure the maximum permissible length has not been exceeded,
by means of a simple calculation:
1.
Completely establish the layout of the system of split flues, including accessories
and outlet terminals.
2.
Consult the table 6 and identify the losses in m
ponent, according to the installation position.
3.
Check that the sum total of losses is less than or equal to the maximum permissible
length in table 5.
Table. 5 - Maximum length of separate ducts
Max. permissible length
cod. 3541F562 - Rev. 02 - 09/2016
BLUEHELIX TECH C
Ø 100
Ø 127
Ø 60
Ø 80
041002X0
041006X0
fig. 16 - Starting accessory for coaxial ducts
Coaxial 60/100
BLUEHELIX TECH
BLUEHELIX TECH
25 C
7 m
8 m
1 m
0.5 m
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
BLUEHELIX TECH 25 C
80 m
041001X0
Coaxial 80/125
BLUEHELIX TECH
BLUEHELIX TECH
35 C
25 C
35 C
7 m
28 m
28 m
8 m
1 m
0.5 m
0.5 m
0.5 m
0.25 m
0.25 m
B
C
2x
1x
= Air /
= Fumes)
Ø 81
(equivalent metres) of every com-
eq
BLUEHELIX TECH 35 C
70 m
eq
eq
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