Gas Connection; Electrical Connections; Fume Ducts - Ferroli ECONCEPT TECH 25 C Instructions D'utilisation, D'installation Et D'entretien

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 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.
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. 8) 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
current safety standards. Have the efficiency and suitability of the earthing sys-
tem checked by professionally qualified personnel; the Manufacturer declines
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 connections to the mains must be made with a
permanent connection and equipped with a double-pole switch with contact
opening of at least 3 mm, installing 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) for connections to the electric line.
B
The user must not change the unit's power cable. If damaged, switch off the unit
and have the cable replaced by professionally qualified personnel. If replacing
the power cable, only use "HAR H05 VV-F" 3x0.75 mm2 cable with max. out-
side 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 electrical terminal block
Follow the instructions given in fig. 9 to access the electrical connection terminal block.
The layout of the terminals for the various connections is given in the wiring diagram in
fig. 23.
fig. 9 - Accessing the terminal block
42
EN
ECONCEPT TECH 25 C - 35 C

3.6 Fume ducts

), use suitably treated Important
3
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. 10 - 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 possible condensate
from flowing back towards the outside and causing dripping.
Table. 3 - Max. length coaxial ducts
Max. permissible length
Reduction factor
90° bend
Reduction factor
45° bend
Connection with separate pipes
fig. 12 - Examples of connection with separate pipes (
cod. 3540R812 - Rev. 07 - 02/2015
Description
Wall horizontal exhaust and inlet
Roof vertical exhaust and inlet
Ø 100
Ø 60
041002X0
041001X0
fig. 11 - Starting accessory for coaxial ducts
Coaxial 60/100
5 m
1 m
0.5 m
C
5x
= Air / = Fumes)
Ø 127
Ø 80
041006X0
Coaxial 80/125
15 m
0.5 m
0.25 m
B C
2x 1x
= Air / = Fumes)