Air/Fume Ducts; Service And Maintenance - Ferroli DIVAPROJECT C24 Instructions D'utilisation, D'installation Et D'entretien

DIVAPROJECT C24
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. 15.
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fig. 4 - Accessing the terminal block

3.6 Air/fume ducts

The diameter of the connecting pipe to the collective flue 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. The current regulations must be complied with
regarding the sizes and installation of the flues and connection pipe.
B
The boiler also has a safety device (fume thermostat) that stops the unit in case
of inadequate draught or obstruction of the flue. This device must never be tam-
pered with or deactivated.

4. SERVICE AND MAINTENANCE

All adjustment, conversion, commissioning and maintenance operations described be-
low must only be carried out by Qualified Personnel (meeting the professional technical
requirements prescribed by current regulations) such as those of the Local After-Sales
Technical 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 work on natural gas or LPG and is factory-set for use with one of these two
gases, as clearly shown on the packing and data plate. Whenever a different gas to 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 sec. 5.4, according to the type of gas used.
3. Supplying power to the unit and open the gas cock.
4. Change the parameter for the type of gas:
• put the boiler in stand-by mode
• press the RESET button for 10 seconds: leds flashing fast for two seconds
• red LED ON
• press the RESET button for 5 seconds: leds flashing fast for two seconds
• turn the DHW knob (rif. 2 - fig. 1) to minimum (for Natural Gas operation) or onto
maximum (for LPG operation)
• press the RESET button for 5 seconds: leds flashing fast for two seconds
• Green LED ON
• turn the heating knob (rif. 1 - fig. 1) to a minimum and then a maximum
• the boiler will return to stand-by mode
• place the knobs onto the set temperatures
5. Adjust the minimum and maximum pressures at the burner (see relevant section),
setting the values given in the technical data table for the type of gas used
6. Apply the sticker, contained in the conversion kit, near the data plate as proof of the
conversion.
TEST mode activation
Press the RESET button 3 times within 3 seconds to activate TEST mode. The boiler
lights at the maximum heating power set as described in the following section.
If TEST mode is activated and enough hot water is drawn to activate DHW mode, the
boiler will stay in TEST mode but the 3-way valve switches to DHW.
Press the RESET button 3 times within 3 seconds to exit TEST mode. On exiting
TEST mode, the set maximum heating power will not be modified.
The TEST mode is automatically disabled in any case after 15 minutes or on stopping of
hot water drawing (if enough hot water is drawn to activate DHW mode).
fig. 5 - TEST mode
Adjustment of pressure at the burner
Since this unit has flame modulation, there are two fixed pressure values: the minimum
and maximum, which must be those given in the technical data table according to the
type of gas.
• Connect a suitable pressure gauge to pressure point "B" located downstream of the
gas valve
• Remove the protection cap "D" undoing screw "A".
• Operate the boiler in TEST mode.
• Turn the heating knob (ref. 1 - fig. 1) to max.
• Adjust the max. pressure with screw "G", clockwise to increase the pressure and
anticlockwise to decrease it
• Disconnect one of the two Faston connectors from the modureg "C" on the gas valve.
• Adjust the min. pressure with screw "E", clockwise to decrease the pressure and
anticlockwise to increase it.
• Reconnect the Faston connector detached from the modureg on the gas valve.
• Check that the maximum pressure has not changed.
• Refit protection cap "D".
• To end the TEST mode repeat the activation sequence or wait 15 minutes.
After checking or adjusting the pressure, make sure to seal the adjust-
A
ment screw with paint or a specific seal.
C
D
E
G
fig. 6 - Gas valve
A - Protection cap screw
B - Pressure point downstream
C - Modureg cable
D - Protection cap
E - Min. pressure adjustment
G - Max. pressure adjustment
X3
C
D
A
EN
B
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