FL D LN C
20
EN
cod. 3541P831 - Rev. 00 - 02/2021
3.3 Plumbing connections
Important
B
The safety valve outlet must be connected to a funnel or
collection pipe to prevent 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
manufacturer cannot be held liable.
B
Before making the connection, check that the unit is ar-
ranged for operation with the type of fuel available and
carefully clean all the system pipes.
Carry out the relevant connections according to the diagram in fig. 2.3 and the symbols
on the unit.
Note:
The unit is equipped with an internal bypass in the heating circuit.
Water system characteristics
In the presence of water harder than 25° Fr (1°F = 10ppm CaCO
3
), 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 connection (see fig. 2.3) 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 con-
nections are tight.
3.5 Electrical connections
IMPORTANT
B
BEFORE CARRYING OUT ANY OPERATION THAT
REQUIRES REMOVING THE CASING, DISCONNECT
THE BOILER FROM THE ELECTRIC MAINS WITH THE
MAIN SWITCH.
NEVER TOUCH THE ELECTRICAL COMPONENTS OR
CONTACTS WITH THE MAIN SWITCH TURNED ON!
DANGER OF ELECTRIC SHOCK WITH RISK OF INJU-
RY OR DEATH!
B
The unit must be connected to an efficient grounding sys-
tem in accordance with applicable safety regulations.
Have the efficiency and suitability of the grounding 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 three-pole ca-
ble, without a plug, for connection to the electric line. The
connections to the grid must be made with a permanent
connection and equipped with a bipolar switch whose
contacts have a minimum opening of at least 3 mm, inter-
posing fuses of max. 3A between the boiler and the line.
Make sure to respect the polarities (LINE: brown wire /
NEUTRAL: blue wire / GROUND: yellow-green wire) in
the connections to the electric line.
B
The unit's supply cable
MUST NOT BE REPLACED BY
THE USER
.
If the cable gets damaged, turn the unit off
and have the cable replaced only by professionally
qualified personnel.
In case of replacement, only use
cable
“HAR H05 VV-F”
3x0.75 mm2 with max. external
diameter of 8 mm.
Room thermostat (optional)
B
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE
VOLTAGE-FREE CONTACTS. CONNECTING 230 V TO
THE ROOM THERMOSTAT TERMINALS WILL PERMA-
NENTLY DAMAGE THE ELECTRONIC BOARD.
When connecting time controls or a timer, do not take the
power supply for these devices from their breaking con-
tacts Their power supply must be by means of direct con-
nection 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. 23.
fig. 10 - Accessing the terminal block
3.6 Air/fume ducts
The diameter of the flue connection pipe must not be less than that of the connection on
the anti-backflow device. Starting from the anti-backflow device it must have a vertical
section at least 50 cm long. Current standards must be complied with regarding sizing
and installation of the flues and connection pipe.
B
The boiler is also equipped with a safety device (fume
thermostat) that stops operation of unit in case of inade-
quate draught of obstruction of the flue. This device must
never be tampered with or deactivated.
4. SERVICE AND MAINTENANCE
Important
B
All adjustment, conversion, commissioning and
maintenance operations described below must only
be carried out by Qualified Personnel (meeting the
professional technical requirements of current regu-
lations) such as the personnel of the Local After-
Sales Technical Service.
LAMBORGHINI declines any liability for damage and/
or injury caused by unqualified and unauthorized per-
sons tampering with the unit.
4.1 Adjustments
Gas conversion
B
ALL COMPONENTS DAMAGED DURING CONVER-
SION OPERATIONS MUST BE REPLACED
.
The unit can operate on natural gas or LPG and is factory-set for use with one of these
two gases, as clearly shown on the packing and on the data plate. Whenever a gas dif-
ferent from that for which the unit is arranged has to be used, the special conversion kit
will be required, proceeding as follows:
1.
Disconnect the boiler power supply and close the gas cock.
2.
Replace the nozzles at the main burner, fitting the nozzles specified in the technical
data table in cap. 5, according to the type of gas used
3.
Switch the boiler power on and open the gas cock.
4.
Modify the parameter for the type of gas:
•
put the boiler in standby mode
•
press the DHW buttons details 1 and 2 - fig. 1 for 10 seconds: the display shows
“
b01
“ flashing.
1
3 4
5 6
72
139
138
3
4
5
6
PWM
