Electrical Connections; Gas Connection; Air/Fume Ducts - Ferroli DIVAtop MICRO 24 C Instrucciones De Uso, Instalación Y Mantenimiento

Antifreeze kit for outdoor installation (optional)
In case of installation in a partially protected place, the boiler must be equipped with the
special antifreeze kit for protecting the DHW circuit. The kit comprises a thermostat and
4 electric heaters. Connect the kit to the PCB and position the thermostat and heaters
on the DHW circuit pipes as indicated in the instructions provided with the kit.
External antiwind grille (optional)
If the boiler is installed outside in a partially protected place, after carrying out the water
and gas connections the special antiwind protection grille must be fitted according to the
instructions given in the kit.
Connection to solar systems
The unit is arranged use in combination with solar systems (fig. 18). For this type of in-
stallation, comply with the following:
1. Contact the local Customer Service Centre for configuring the unit at first lighting.
2. Set a DHW temperature of approx. 50°C on the unit.
3. Make sure to use the special plumbing kits FERROLI.
fig. 18 - Solar system diagram
A Wall-mounted boiler
B Hot water storage tank
C Domestic hot water outlet
D Cold water
E Mixing

3.4 Gas connection

B
Before carrying out the connection, make sure the unit is arranged for operation
with the type of fuel available and carefully clean all the pipes of the gas system
to remove any residues that could affect proper boiler operation.
The gas must be connected to the relevant connection (see fig. 17) in conformity with
current standards, 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. The capacity of the gas meter must be sufficient for the simultaneous use
of all units connected to it. The diameter of the gas pipe leaving the boiler does not de-
termine the diameter of the pipe between the unit and the meter; it must be chosen ac-
cording to its length and pressure losses, in conformity with the current standards.
B
Do not use the gas pipes to earth electrical appliances.
32 EN
DIVAtop MICRO C

3.5 Electrical connections

Connection to the electrical grid
B
The unit's electrical safety is only guaranteed when correctly connected to an
efficient earthing system executed according to current safety standards. Have
the efficiency and suitability of the earthing system checked by professionally
qualified personnel. The manufacturer is not responsible for any damage
caused by failure to earth the system. Also make sure that the electrical system
is adequate for the maximum power absorbed by the unit, as specified on the
boiler dataplate.
The boiler is prewired and provided with a Y-cable and plug for connection to the elec-
tricity 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, interposing fuses of max. 3A between the boiler and the line. It is important to re-
spect the polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green
wire) in making connections to the electrical line. During installation or when changing
the power cable, the earth wire must be left 2 cm longer than the others.
B
The user must never change the unit's power cable. If the cable gets damaged,
switch off the unit and have it changed solely by professionally qualified person-
nel. If changing the electric power cable, use solely "HAR H05 VV-F" 3x0.75
mm2 cable with a maximum outside diameter of 8 mm.
Room thermostat (optional)
B
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 electrical terminal block
After removing the boiler front panel (see fig. 22) the terminal block can be accessed for
connection of the external probe (detail 1 fig. 19), the room thermostat (detail 3 fig. 19)
or the remote timer control (detail 2 fig. 19).

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 inadequate draught of obstruction of the flue. This
device must never be tampered with or deactivated.
4. SERVICE AND MAINTENANCE
All adjustment, conversion, startup and maintenance operations described below must
only be carried out by Qualified Personnel (meeting the professional technical require-
ments prescribed by current regulations) such as those of the Local After-Sales Tech-
nical Service.
FERROLI declines any liability for damage and/or injury caused by unqualified and un-
authorised persons tampering with the unit.
4.1 Adjustments
Gas conversion
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 dataplate. Whenever a different
gas to that for which the unit is arranged has to be used, a conversion kit will be required,
proceeding as follows:
1. Replace the nozzles at the main burner, fitting the nozzles specified in the technical
data table in sec. 5.2, according to the type of gas used
2. Modify the parameter for the type of gas:
• put the boiler in standby mode
• Press the reset button (detail 8 - fig. 1) for 10 seconds: the display shows "TS"
flashing
• press the reset button (detail 8 - fig. 1): the display shows "P01".
• Press the DHW buttons
00 (for natural gas operation) or 01 (for LPG operation).
cod. 3540S270 - 02/2010 (Rev. 00)
fig. 19 - Accessing the terminal block
(details 1 and 2 - fig. 1) to set parameter