Fer FERtech F 32 D Instructions For Use, Installation And Maintenance Download Page 14

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FERtech F 24 D - F 32 D

3.3 Plumbing connections
Important

The safety valve outlet must be connected to a funnel or collection pipe to pre-
vent water spurting onto the floor in case of overpressure in the heating circuit.
Otherwise, if the discharge valve cuts in and floods the room, the boiler manu-
facturer cannot be held liable.

Before making the connection, check that the unit is arranged for operation with
the type of fuel available and carefully clean all the system pipes.

Carry out the relevant connections according to the cover diagram and the symbols giv-
en on the unit.

Note:

The unit has an internal bypass in the heating circuit.

Water system characteristics

In the presence of water harder than 25° Fr (1°F = 10ppm CaCO

), use suitably treated

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.

3.4 Gas connection

The gas must be connected to the relevant union (see figure on cover) in conformity with
the current regulations, with a rigid metal pipe or with a continuous surface flexible s/steel
tube, installing a gas cock between the system and boiler. Make sure all the gas connec-
tions are tight.

3.5 Electrical connections
Important

The unit must be connected to an efficient earthing system in conformity with
current safety regulations. 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 connections to the power supply must be per-
manent and equipped with a double-pole switch with contact opening distance
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) in connections to the electric line.

The unit's power cable must not be replaced by the user; if damaged, switch
the unit off 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. ext. diameter of 8 mm.

Room thermostat (optional)

IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE
CONTACTS. CONNECTING 230 V TO THE ROOM THERMOSTAT TERMI-
NALS WILL PERMANENTLY DAMAGE THE ELECTRONIC BOARD.
When connecting time controls or a timer, do not take the power supply for
these devices from their breaking contacts Their power supply must be by
means of direct connection from the mains or with batteries, depending on the
kind of device.

Accessing the electrical terminal block

The electrical terminal block can be accessed after removing the casing. The layout of
the terminals for the various connections is also given in the wiring diagram in fig. 22.

fig. 8 - Accessing the terminal block

3.6 Fume ducts
Important

The unit is a "C type" with sealed chamber and forced draught, the air inlet and fume out-
let must be connected to one of the following extraction/suction systems. The unit is ap-
proved for operation with all the

Cny

flue configurations given on the dataplate. Some

configurations may be expressly limited or not permitted by law, standards or local reg-
ulations. Before installation, check and carefully follow the instructions. Also, comply with
the instructions on the positioning of wall and/or roof terminals and the minimum distanc-
es from windows, walls, ventilation openings, etc.

Baffles

Boiler operation requires fitting the baffles supplied with the unit. Check that the boiler
has right baffle (if to be used) and its correct positioning.

Baffle replacement with

boiler not installed

Baffle replacement with

boiler and fume ducts already installed

Connection with coaxial pipes

fig. 9 - Examples of connection with coaxial pipes (

= Air /

= Fumes)

Table. 2 - Typology

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.

fig. 10 - Starting accessory for coaxial ducts

Table. 3 - Baffles for coaxial ducts