Ferroli DIVA D F24 Technical manual

cod. 3541B072 — Rev. 00 - 11/2016
DIVAtech F 24 D
700
400
808050557560
178
126
Ø 110 ÷ 120
120
725
676
50 75 55 50 80 75
93
114
Ø 30
Ø 30
Ø 24.5
Ø 24.5
Ø 24.5
FABCD E
ABCDE
85 115 90 110
195
266
F
330
ABCDEF
EN - INSTRUCTIONS FOR USE, INSTALLATION AND MAINTENANCE
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DIVAtech F 24 D
2EN cod. 3541B072 - Rev. 00 - 11/2016
EN
1. GENERAL WARNINGS
• Carefully read and follow the instructions contained in this instruction booklet.
• After boiler installation, inform the user regarding its operation and give him this
manual, which is an integral and essential part of the product and must be kept with
care for future reference.
• Installation and maintenance must be carried out by professionally qualified person-
nel, in compliance with the current regulations and according to the manufacturer's
instructions. Do not carry out any operation on the sealed control parts.
• Incorrect installation or inadequate maintenance can result in damage or injury. The
Manufacturer declines any liability for damage due to errors in installation and use,
or failure to follow the instructions.
• Before carrying out any cleaning or maintenance operation, disconnect the unit from
the electrical power supply using the switch and/or the special cut-off devices.
• In case of a fault and/or poor operation, deactivate the unit and do not try to repair
it or directly intervene. Contact professionally qualified personnel. Any repair/re-
placement of the products must only be carried out by qualified personnel using orig-
inal replacement parts. Failure to comply with the above could affect the safety of
the unit.
• This unit must only be used for its intended purpose. Any other use is deemed im-
proper and therefore hazardous.
• The packing materials are potentially hazardous and must not be left within the
reach of children.
• The unit must not be used by people (including children) with limited physical, sen-
sory or mental abilities or without experience and knowledge of it, unless instructed
or supervised in its use by someone responsible for their safety.
• The unit and its accessories must be appropriately disposed of, in compliance with
the current regulations.
• The images given in this manual are a simplified representation of the product. In
this representation there may be slight and insignificant differences with respect to
the product supplied.
2. OPERATING INSTRUCTIONS
2.1 Introduction
DIVAtech F 24 D is a high-efficiency heat generator for heating and domestic hot water
production, running on natural gas, equipped with an open-flue burner with electronic ig-
nition, sealed chamber with forced ventilation, and microprocessor control system, de-
signed for installation indoors or outdoors in a partially protected place (in compliance
with EN 297/A6) for temperatures to -5°C.
2.2 Control panel
Panel
fig. 1 - Control panel
Key of panel fig. 1
1DHW temperature setting decrease button
2DHW temperature setting increase button
3Heating system temperature setting decrease button
4Heating system temperature setting increase button
5Display
6"Sliding Temperature" Menu - Summer/Winter mode selection - Reset button
7Unit On/Off - Economy/Comfort mode selection button
8DHW symbol
9DHW mode
10 Summer mode
11 Multifunction
12 Eco (Economy) mode
13 Heating
14 Heating symbol
15 Burner lit and actual power level (flashing during combustion fault function)
16 Service Tool connection
17 Water gauge
Indication during operation
Heating
A heating demand (generated by the Room Thermostat or Remote Timer Control) is in-
dicated by flashing of the hot air above the radiator on the display.
The display (detail 11 - fig. 1) shows the actual heating delivery temperature and, during
heating standby time, the message “d2”.
Domestic hot water (DHW)
A DHW demand (generated by drawing domestic hot water) is indicated by flashing of
the hot water under the tap on the display.
The display (detail 11 - fig. 1) shows the actual DHW outlet temperature and, during
DHW standby time, the message “d1“.
Comfort
A Comfort demand (reinstatement of temperature inside the boiler) is indicated by flash-
ing of the water under the tap on the display. The display (detail 11 - fig. 1) shows the
actual temperature of the water in the boiler.
Fault
In case of a fault (see cap. 4.4) the display shows the fault code (detail 11 - fig. 1) and,
during safety standby times, the messages "d3" and "d4".
2.3 Lighting and turning off
Connection to the power supply
• During the first 5 seconds the display will also show the card software release.
• Open the gas cock ahead of the boiler.
• The boiler is now ready to function automatically whenever domestic hot water is
drawn or in case of a heating demand (generated by Room Thermostat or Remote
Temperature Control).
Turning the boiler off and on
Press the on/off button (detail 7 - fig. 1) for 5 seconds.
fig. 2 - Turning the boiler off
When the boiler is turned off, the PCB is still powered. Domestic hot water and heating
are disabled. The antifreeze system remains activated. To relight the boiler, press the
on/off button (detail 7 fig. 1) again for 5 seconds.
fig. 3
The boiler will be immediately ready to work whenever domestic hot water is drawn or in
case of a heating demand (generated by the Room Thermostat or the Remote Timer
control).
BThe antifreeze system does not work when the power and/or gas to the unit are
turned off. To avoid damage caused by freezing during long idle periods in win-
ter, it is advisable to drain all water from the boiler, DHW circuit and system; or
drain just the DHW circuit and add a suitable antifreeze to the heating system,
complying with that prescribed insec. 3.3.
2.4 Adjustments
Summer/Winter Switchover
Press the summer/winter button (detail 6 - fig. 1) for 2 seconds.
The display activates the Summer symbol (detail 10 - fig. 1): the boiler will only deliver
domestic hot water. The antifreeze system remains activated.
To deactivate the Summer mode, press the summer/winter button (detail 6 - fig. 1)
again for 2 seconds.
Heating temperature adjustment
Use the heating buttons (details 3 and 4 - fig. 1) to vary the temperature from a min. of
30°C to a max. of 80°C; in any case, it is advisable not to operate the boiler below 45°C.
fig. 4
eco
comfort
reset
915
13
12
11
8
1
36
7102
16414
5
17
0
1
4
2
3
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DIVAtech F 24 D
3
EN
cod. 3541B072 - Rev. 00 - 11/2016
Domestic hot water (DHW) temperature adjustment
Use the DHW buttons (details 1 and 2 - fig. 1) to adjust the temperature from a min. of
40°C to a max. of 55°C.
fig. 5
Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature required in the rooms. If the room ther-
mostat is not installed, the boiler will keep the system at the set system delivery setpoint
temperature.
Room temperature adjustment (with optional remote timer control)
Using the remote timer control, set the required temperature in the rooms. The boiler will
adjust the system water according to the required room temperature. For operation with
remote timer control, please refer to the relevant instruction manual.
ECO/COMFORT selection
The unit has a function that ensures a high domestic hot water delivery speed and max-
imum comfort for the user. When the device is activated (COMFORT mode), the water
contained in the boiler is kept hot, thereby ensuring immediate availability of hot water
on opening the tap, without waiting times.
The user can deactivate the device (ECO mode) by pressing the eco/comfort button
(detail 7 - fig. 1). In ECO mode the display activates the ECO symbol (detail 12 - fig. 1).
To activate the COMFORT mode, press the eco/comfort button (detail 7 - fig. 1) again.
Sliding Temperature
When the optional external probe is installed the boiler adjustment system works with
"Sliding Temperature". In this mode, the heating system temperature is regulated ac-
cording to weather conditions, to ensure the high comfort and energy efficiency through-
out the year. In particular, as the outside temperature increases the system delivery
temperature decreases according to a specific "compensation curve".
With the Sliding Temperature adjustment, the temperature set with the heating buttons
(detail 3 - fig. 1) becomes the maximum system delivery temperature. It is advisable to
set a maximum value to allow system adjustment throughout its useful operating range.
The boiler must be adjusted at the time of installation by qualified personnel. However,
the user can make any further adjustments necessary to optimise comfort levels.
Compensation curve and curve offset
Press the reset button (detail 6 - fig. 1) for 5 seconds to access the “Sliding temperature”
menu; the display shows “CU” flashing.
Use the DHW buttons (detail 1 - fig. 1) to adjust the desired curve from 1 to 10 according
to the characteristic (fig. 6). By setting the curve to 0, the sliding temperature adjustment
is disabled.
Press the heating buttons (detail 3 - fig. 1) to access parallel curve offset; the display
shows “OF” flashing. Use the DHW buttons (detail 1 - fig. 1) to adjust parallel curve offset
according to the characteristic (fig. 7).
Press the reset button (detail 6 - fig. 1) again for 5 seconds to exit the "Sliding Temper-
ature" menu.
If the room temperature is lower than the required value, it is advisable to set a higher
order curve and vice versa. Proceed by increasing or decreasing in steps of one and
check the result in the room.
fig. 6 - Compensation curves
fig. 7 - Example of compensation parallel curve offset
Adjustments from Remote Timer Control
AIf the Remote Timer Control (optional) is connected to the boiler, the above ad-
justments are managed according to that given in table 1.
Table. 1
System water pressure adjustment
The filling pressure with system cold, read on boiler water gauge (detail 17 - fig. 1), must
be approx. 1.0 bar. If the system pressure falls to values below minimum, the boiler stops
and fault F37 is displayed. Operate the filling cock detail 1 fig. 8 and bring it to the initial
value. Always close the filling cock at the end of the operation.
fig. 8 - Filling cock
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20
30
40
50
60
70
80
90
85
20 10 0 -10 -20
1
2
3
4
5
68910 7
20
30
40
50
60
70
80
90
85
20
30
40
50
60
70
80
90
85
1
2
3
4
5
6
8910 7
1
2
3
4
568910 7
OFFSET = 20 OFFSET = 40
Heating temperature setting
Adjustment can be made from the Remote Timer Control menu and the boiler con-
trol panel.
DHW temperature adjustment
Adjustment can be made from the Remote Timer Control menu and the boiler con-
trol panel.
Summer/Winter Switchover
Summer mode has priority over a possible Remote Timer Control heating
demand.
Eco/Comfort selection
On disabling DHW from the Remote Timer Control menu, the boiler selects the
Economy mode. In this condition, the
eco/comfort button (detail 7 - fig. 1) on the
boiler panel is disabled.
On enabling DHW from the Remote Timer Control menu, the boiler selects the
Comfort mode. In this condition it is possible select one of the two modes with the
eco/comfort button (detail 7 - fig. 1) on the boiler panel.
Sliding Temperature
Both the Remote Timer Control and the boiler card manage Sliding Temperature
adjustment: the boiler card Sliding Temperature has priority.
1

DIVAtech F 24 D
4EN cod. 3541B072 - Rev. 00 - 11/2016
3. INSTALLATION
3.1 General Instructions
BOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSON-
NEL, IN ACCORDANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL
MANUAL, THE PROVISIONS OF CURRENT LAW, THE PRESCRIPTIONS OF NA-
TIONAL AND LOCAL STANDARDS AND THE RULES OF PROPER WORKMANSHIP.
3.2 Place of installation
The combustion circuit is sealed with respect to the place of installation, therefore the
unit can be installed in any room. However, the place of installation must be sufficiently
ventilated to prevent the creation of dangerous conditions in case of even small gas
leaks. This safety standard is required by the EEC Directive no. 2009/142 for all gas
units, including those with sealed chamber
The unit is suitable for operation in a partially protected place in compliance with EN 297
pr A6, for temperatures to -5°C. It is advisable to install the boiler under the slope of a
roof, inside a balcony or in a sheltered recess.
Therefore the place of installation must be free of dust, flammable materials or objects
or corrosive gases.
The boiler is arranged for wall mounting and comes standard with a hooking bracket. Fix
the bracket to the wall according to the measurements given in the cover drawing and
hook the boiler on it. A metal template for marking the drilling points on the wall is avail-
able by request. The wall fixing must ensure stable and effective support for the gener-
ator.
AIf the unit is enclosed in a cabinet or mounted alongside, a space must be pro-
vided for removing the casing and for normal maintenance operations
3.3 Plumbing connections
Important
BThe 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.
BBefore 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 CaCO3), 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
BThe 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.
BThe 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)
BIMPORTANT: 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. 9 - 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.
ABaffle replacement with boiler not installed
BBaffle replacement with boiler and fume ducts already installed
123456
72
139
138
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DIVAtech F 24 D
5
EN
cod. 3541B072 - Rev. 00 - 11/2016
Connection with coaxial pipes
fig. 10 - 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. 11 - Starting accessory for coaxial ducts
Table. 3 - Baffles for coaxial ducts
Connection with separate pipes
fig. 12 - Examples of connection with separate pipes ( = Air / = Fumes)
Table. 4 - Typology
For the connection of separate ducts, fit the unit with the following starting accessory:
fig. 13 - Starting accessory for separate ducts
Before installation, check the baffle to be used and make sure the maximum permissible
length has not been exceeded, by means of a simple calculation:
1. Establish the layout of the system of split flues, including accessories and outlet ter-
minals.
2. Consult the table 6 and identify the losses in meq (equivalent metres) of every com-
ponent, according to the installation position.
3. Check that the sum total of losses is less than or equal to the maximum permissible
length in table 5.
Table. 5 - Baffles for separate ducts
Type Description
C1X
Wall horizontal exhaust and inlet
C3X Roof vertical exhaust and inlet
Coaxial 60/100 Coaxial 80/125
Max. permissible length 5 m 10 m
Reduction factor 90° bend 1 m 0.5 m
Reduction factor 45° bend 0.5 m 0.25 m
Baffle to use
0 ÷ 2 m Ø 43 0 ÷ 3 m Ø 43
2 ÷ 5 m no baffle 3 ÷ 10 m no baffle
C
1X
C
1X
C
3X
C
3X
C
3X
C
1X
Ø126
Ø82
Ø60
Ø130
Ø100
010018X0010006X0
100
60
45.6
010007X0
68
118
100
60
Type Description
C1X
Wall horizontal exhaust and intake. The inlet/outlet terminals must be concentric or close enough to be
undergo similar wind conditions (within 50 cm)
C3X Roof vertical exhaust and intake. Inlet/outlet terminals like for C12
C5X Wall or roof exhaust and intake separate or in any case in areas with different pressures. The exhaust and
intake must not be positioned on opposite walls.
C6X Intake and exhaust with separately certified pipes (EN 1856/1)
B2X Intake from installation room and wall or roof exhaust
IMPORTANT - THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION
DIVAtech F 24 D
Max. permissible length
60 m
eq
Baffle to use
0 - 20 m
eq
Ø 43
20 - 45 m
eq
Ø 47
45 - 60 m
eq
No baffle
C5
C 3
B2 C1
ma 50 cm
50
80
010011X0
80
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DIVAtech F 24 D
6EN cod. 3541B072 - Rev. 00 - 11/2016
Table. 6 - Accessories
Connection to collective flues
fig. 14 - Examples of connection to collective flues ( = Air / = Fumes)
Table. 7 - Typology
If the boiler is to be connected DIVAtech F 24 D to a collective flue or to a single flue with
natural draught, the flue or chimney must be expressly designed by professionally qual-
ified technical personnel in conformity with the current regulations and be suitable for
sealed chamber units equipped with fan.
4. SERVICE AND MAINTENANCE
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 power supply ahead of the boiler and close the gas cock;
2. Replace the nozzles at the main burner and pilot burner, fitting the nozzles indicated
in the technical data table in cap. 5, depending on the type of gas used
3. Connect the power supply ahead of the boiler 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.
• press the DHW buttons details 1 and 2 - fig. 1) to set parameter 00 (for opera-
tion with natural gas) or 01 (for operation with LPG).
• press the DHW buttons details 1 and 2 - fig. 1 for 10 seconds.
• the boiler will return to standby mode
5. Adjust the minimum and maximum pressures at the burner (ref. relevant para-
graph), 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 heating buttons (details 3 and 4 - fig. 1) together for 5 seconds to activate the
TEST mode. The boiler lights at the maximum heating power set as described in the fol-
lowing section.
The heating and DHW symbols (fig. 15) flash on the display; the heating power will be
displayed alongside.
fig. 15 - TEST mode (heating power = 100%)
Press the heating buttons (details 3 and 4 - fig. 1) to increase or decrease the power
(min.=0%, max.=100%).
Press the DHW button "-" (detail 1 - fig. 1) and boiler power is immediately adjusted to
min. (0%). Press the DHW button "+" (detail 2 - fig. 1) and boiler power is immediately
adjusted to max. (100%).
If the TEST mode is activated and enough hot water is drawn to activate the DHW mode,
the boiler remains in TEST mode but the 3-way valve goes to DHW.
To deactivate the TEST mode, press the heating buttons (details 3 and 4 - fig. 1) for 5
seconds.
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 the DHW mode).
Pressure adjustment at the burner
Since this unit has flame modulation, there are two fixed pressure settings: 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 the pressure point "B" downstream of the
gas valve.
• Activate the TEST mode (see cap. 4.1).
• Press the Eco/Comfort button for 2 seconds to access the gas valve Calibration
mode.
• The card goes to the setting “q02”; displaying the actually saved value, by pressing
the DHW buttons .
• If the pressure gauge reading is different from the nominal maximum pressure, pro-
ceed by increases/decreases of 1 or 2 units of parameter “q02” by pressing the
DHW buttons : the value is stored after each modification; wait 10 seconds for the
pressure to stabilise.
• Press the heating button “-” (ref. 3 - fig. 1).
• The card goes to the setting “q01”; displaying the actually saved value, by pressing
the DHW buttons .
• If the pressure gauge reading is different from the nominal minimum pressure, pro-
ceed by increases/decreases of 1 or 2 units of parameter “q01” by pressing the
DHW buttons : the value is stored after each modification; wait 10 seconds for the
pressure to stabilise.
• Recheck both adjustments by pressing the heating buttons and adjust them if nec-
essary by repeating the above procedure.
• Press the Eco/Comfort button for 2 seconds to return to the TEST mode.
• Deactivate the TEST mode (see cap. 4.1).
• Disconnect the pressure gauge.
Losses in m
eq
Air
inlet
Fume exhaust
Vertical Horizontal
Ø 80
PIPE
0.5 m M/F 1KWMA38A 0.5 0.5 1.0
1 m M/F 1KWMA83A 1.0 1.0 2.0
2 m M/F 1KWMA06K 2.0 2.0 4.0
BEND 45° F/F 1KWMA01K 1.9 2.9
45° M/F 1KWMA65A 1.9 2.9
90° F/F 1KWMA02K 2.0 3.0
90° M/F 1KWMA82A 1.5 2.5
90° M/F + Test point 1KWMA70U 1.5 2.5
PIPE SECTION with test point 1KWMA16U 0.2 0.2
for condensate drain 1KWMA55U - 3.0
TEE for condensate drain 1KWMA05K - 7.0
TERMINAL air, wall 1KWMA85A 2.0 -
fumes, wall with antiwind 1KWMA86A - 5.0
FLUE Split air/fumes 80/80 1KWMA84U - 12.0
Fume outlet only Ø80 1KWMA83U +
1KWMA86U
-4.0
Ø 100
REDUCTION
from Ø80 to Ø100 1KWMA03U 0.0 0.0
from Ø100 to Ø80 1.5 3.0
PIPE 1 m M/F 1KWMA08K 0.4 0.4 0.8
BEND 45° M/F 1KWMA03K 0.6 1.0
90° M/F 1KWMA04K 0.8 1.3
TERMINAL air, wall 1KWMA14K 1.5 -
fumes, wall with antiwind 1KWMA29K - 3.0
Ø 60
PIPE 1 m M/F 010028X0 - 2.0 6.0
BEND 90° M/F 010029X0 - 6.0
REDUCTION 80 - 60 010030X0 - 8.0
TERMINAL fumes, wall 1KWMA90A - 7.0
ATTENTION: CONSIDER THE HIGH PRESSURE LOSSES OF Ø60 ACCESSORIES;
USE THEM ONLY IF NECESSARY AND AT THE LAST FUME EXHAUST SECTION.
Type Description
C2X
Intake and exhaust in common flue (intake and exhaust in same flue)
C4X Intake and exhaust in common and separate flues, but undergoing similar wind conditions
C8X Exhaust in single or common flue and wall intake
B3X Intake from installation room by means of concentric duct (that encloses the exhaust) and exhaust in com-
mon flue with natural draught
IMPORTANT- THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION
C93
Exhaust to a vertical terminal and intake from existing flue.
C 8X C 2X
C 4X
C93C93
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DIVAtech F 24 D
7
EN
cod. 3541B072 - Rev. 00 - 11/2016
Heating power adjustment
To adjust the heating power, switch the boiler to TEST mode (see sec. 4.1). Press the
heating buttons detail 3 - fig. 1 to increase or decrease the power (min. = 00 - max. =
100). Press the reset button within 5 seconds and the max. power will remain that just
set. Exit TEST mode (see sec. 4.1).
4.2 Startup
Before lighting the boiler
• Check the seal of the gas system.
• Check correct prefilling of the expansion tank.
• Fill the water system and make sure all air contained in the boiler and the system has been
vented.
• Make sure there are no water leaks in the system, DHW circuits, connections or boiler.
• Check correct connection of the electrical system and efficiency of the earthing system.
• Make sure the gas pressure for heating is that required.
• Make sure there are no flammable liquids or materials in the immediate vicinity of the boiler
Checks during operation
• Switch the unit on.
• Check the tightness of the fuel circuit and water systems.
• Check the efficiency of the flue and air/fume ducts while the boiler is working.
• Make sure the water is circulating properly between the boiler and the systems.
• Make sure the gas valve modulates correctly in the heating and domestic hot water produc-
tion stages.
• Check correct boiler lighting by performing various tests, turning it on and off with the room
thermostat or remote control.
• Make sure the fuel consumption indicated on the meter matches that given in the technical
data table in
cap. 5 .
• Make sure that with no demand for heating, the burner lights correctly on opening a hot water
tap. Check that in heating mode, on opening a hot water tap, the heating circulating pump
stops and there is regular production of hot water.
• Make sure the parameters are programmed correctly and carry out any required customisa-
tion (compensation curve, power, temperatures, etc.).
4.3 Maintenance
Periodical check
To ensure correct operation of the unit over time, have qualified personnel carry out a
yearly check, providing for the following:
• The control and safety devices (gas valve, flow meter, thermostats, etc.) must func-
tion correctly.
• The fume exhaust circuit must be perfectly efficient.
(Sealed chamber boiler: fan, pressure switch, etc. -The sealed chamber must be
tight: seals, cable glands, etc.)
(Open chamber boiler: anti-backflow device, fume thermostat, etc.)
• The air-fume end piece and ducts must be free of obstructions and leaks
• The burner and exchanger must be clean and free of deposits. For possible cleaning
do not use chemical products or wire brushes.
• The electrode must be properly positioned and free of scale.
fig. 18 - Electrode positioning
• The gas and water systems must be airtight.
• The water pressure in the cold water system must be about 1 bar; otherwise, bring
it to that value.
• The circulating pump must not be blocked.
• The expansion tank must be filled.
• The gas flow and pressure must correspond to that given in the respective tables.
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault,
the display will flash together with the fault symbol (detail 11 - fig. 1) indicating the fault
code.
There are faults that cause permanent shutdown (marked with the letter "A"): to restore
operation, press the RESET button (detail 6 - fig. 1) for 1 second or RESET on the op-
tional remote timer control if installed; if the boiler fails to start, it is necessary to eliminate
the fault.
Faults marked with the letter "F" cause temporary shutdowns that are automatically reset
as soon as the value returns within the boiler's normal working range.
List of faults
Table. 8
fig. 16 - Gas valve
A - Upstream pressure point
B - Downstream pressure point
I - Gas valve electrical connection
R - Gas outlet
S - Gas inlet
fig. 17 - Gas valve connection
TYPE SGV100
Pi max 65 mbar
24 Vdc - class B+A
R
B
I
A
S
~ 65W~ 24W
1 2 3 4
3
±
0,5
= =
Code
fault Fault Possible cause Cure
A01
No burner ignition
No gas
Check the regular gas flow to the boiler
and that the air has been eliminated
from the pipes
Ignition/detection electrode fault
Check the wiring of the electrode and
that it is correctly positioned and free
of any deposits
Faulty gas valve Check the gas valve and replace it if
necessary
Gas valve wiring disconnected Check the wiring
Ignition power too low Adjust the ignition power
A02
Flame present signal with
burner off
Electrode fault Check the ionisation electrode wiring
Card fault Check the card
A03
Overtemperature protection
activation
Heating sensor damaged Check the correct positioning and
operation of the heating sensor
No water circulation in the system Check the circulating pump
Air in the system Vent the system
F04 Card parameter fault Wrong card parameter setting Check the card parameter and modify
it if necessary
F05
Card parameter fault Wrong card parameter setting Check the card parameter and modify
it if necessary
Fan fault
Wiring disconnected Check the wiring
Defective fan Check the fan
Card fault Check the card
A06
No flame after the ignition
phase
Low pressure in the gas system Check the gas pressure
Burner minimum pressure setting Check the pressures
F07 Card parameter fault Wrong card parameter setting Check the card parameter and modify
it if necessary
A09 Gas valve fault
Wiring disconnected Check the wiring
Faulty gas valve Check the gas valve and replace it if
necessary
F10 Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the sensorWiring shorted
Wiring disconnected
F11 DHW sensor fault
Sensor damaged
Check the wiring or replace the sensorWiring shorted
Wiring disconnected
F14 Delivery sensor 2 fault
Sensor damaged
Check the wiring or replace the sensorWiring shorted
Wiring disconnected
A16 Gas valve fault
Wiring disconnected Check the wiring
Faulty gas valve Check the gas valve and replace it if
necessary
F20 Combustion control fault
Fan fault Check the fan and fan wiring
Faulty baffle Check the baffle and replace it if nec-
essary
Flue not correctly sized or
obstructed Check the flue
A21 Poor combustion fault Fault F20 generated 6 times in the
last 10 minutes See fault F20
A23 Card parameter fault Wrong card parameter setting Check the card parameter and modify
it if necessary
A24 Card parameter fault Wrong card parameter setting Check the card parameter and modify
it if necessary
F34 Supply voltage under 180V. Electric mains trouble Check the electrical system
F35 Faulty mains frequency Electric mains trouble Check the electrical system
F37
Incorrect system water pres-
sure
Pressure too low Fill the system
Water pressure switch damaged or
not connected Check the sensor
F39 External probe fault
Probe damaged or wiring shorted Check the wiring or replace the sensor
Probe disconnected after activat-
ing the sliding temperature
Reconnect the external sensor or disa-
ble the sliding temperature
A41 Sensor positioning Delivery sensor or DHW sensor
detached from the pipe
Check the correct positioning and
operation of the sensors
F42 Heating sensor fault Sensor damaged Replace the sensor
F43 Exchanger protection trips. No H
2
O system circulation Check the circulating pump
Air in the system Vent the system
F50 Gas valve fault
Modulating Operator wiring discon-
nected Check the wiring
Faulty gas valve Check the gas valve and replace it if
necessary
A51 Poor combustion fault Inlet/exhaust flue obstruction Check the flue

DIVAtech F 24 D
8EN cod. 3541B072 - Rev. 00 - 11/2016
5. TECHNICAL DATA AND CHARACTERISTICS
Table. 9 - Key of figures cap. 5
5.1 General view and main components
fig. 19 - General view DIVAtech F 24 D
5.2 Water circuit
fig. 20 - Heating Circuit
fig. 21 - DHW Circuit
5 Sealed chamber 38 Flowswitch
7 Gas inlet 39 Water flow limiter
8 Domestic hot water outlet 42 DHW temperature sensor
9 Cold water inlet 44 Gas valve
10 System delivery 56 Expansion tank
11 System return 72 Room thermostat (not supplied)
14 Safety valve 74 System filling cock
16 Fan 81 Ignition and detection electrode
19 Combustion chamber 95 Diverter valve
22 Burner 114 Water pressure switch
27 Copper exchanger for heating and hot water 138 External probe (not supplied)
28 Fume manifold 139 Room unit (not supplied)
29 Fume outlet manifold 187 Fume baffle
32 Heating circulating pump 194 DHW exchanger
36 Automatic air vent 241 Automatic bypass
37 Cold water inlet filter 278 Double sensor (Safety + Heating)
44 32
114
36
14
19
27
28
56
29
5
16
81
95
278
42 38
37
10 8 7 9 11
194
39 74
187
22
56
27
14
74
32
38
1110 8 9
278
95
241 42
114 36
194
56
27
14
74
32
38
1110 8 9
278
95
241 42
114 36
194

DIVAtech F 24 D
9
EN
cod. 3541B072 - Rev. 00 - 11/2016
5.3 Technical data table 5.4 Diagrams
Pressure - power diagrams DIVAtech F 24 D
A = LPG - B = NATURAL GAS
Circulating pump head / pressure lossesDIVAtech F 24 D
A = Boiler pressure losses - 1, 2 and 3 = Circulating pump speed
Data Unit DIVAtech F 24 D
Max. heating capacity kW 25.8 (Q)
Min. heating capacity kW 8.3 (Q)
Max. Heat Output in heating kW 24.0 (P)
Min. Heat Output in heating kW 7.2 (P)
Max. Heat Output in hot water production kW 24.0
Min. Heat Output in hot water production kW 7.2
Efficiency Pmax (80-60°C) % 93.0
Efficiency 30% % 90.5
Efficiency class Directive 92/42 EEC -
NOx emission class - 3 (<150 mg/kWh) (NOx)
Burner nozzles G20 no.x Ø 11 x 1.35
Gas supply pressure G20 mbar 20.0
Max. gas pressure at burner (G20) mbar 12.0
Min. gas pressure at burner (G20) mbar 1.5
Max. gas delivery G20 m
3
/h 2.73
Min. gas delivery G20 m
3
/h 0.88
Burner nozzles G31 no.x Ø 11 x 0.79
Gas supply pressure G31 mbar 37
Max. gas pressure at burner (G31) mbar 35.0
Min. gas pressure at burner (G31) mbar 5.0
Max. gas delivery G31 kg/h 2.00
Min. gas delivery G31 kg/h 0.65
Max. working pressure in heating bar 3 (PMS)
Min. working pressure in heating bar 0.8
Max. heating temperature °C 90 (tmax)
Heating water content litres 1.0
Heating expansion tank capacity litres 8
Heating expansion tank prefilling pressure bar 1
Max. working pressure in hot water production bar 9 (PMW)
Min. working pressure in hot water production bar 0.25
DHW flow rate Dt 25°C l/min 13.7
DHW flow rate Dt 30°C l/min 11.4 (D)
Protection rating IP X5D
Power supply voltage V/Hz 230V/50Hz
Electrical power input W 110
Electrical power input in hot water production W 110
Empty weight kg 32
Type of unit C
12
-C
22
-C
32
-C
42
-C
52
-C
62
-C
72
-C
82
-B
22
PIN CE 0461BR0842
A
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
35
30
25
20
15
10
5
kW
mbar
B
0
1
2
3
4
5
6
7
0 500 1.000 1.500 2.000
Q [l/h]
H [m H
2
O]
A
3
2
1

DIVAtech F 24 D
10 EN cod. 3541B072 - Rev. 00 - 11/2016
5.5 Wiring diagram
fig. 22 - Electrical circuit
AImportant: Before connecting the room thermostat or the remote timer control, remove the jumper on the terminal block.
81
1k W
L
N
230V
50 Hz
16
N
L
32
L
N
°T°T
278
°
T
42
4321
44
38114
ABM01
LC32
321
95
72
139
138

(1 Declaration of conformity
Manufacturer
declares that this unit complies with the following EU directives:
• Gas Appliance Directive 2009/142
• Efficiency Directive 92/42
• Low Voltage Directive 
• Electromagnetic Compatibility Directive 

FERROLI S.p.A.
Via Ritonda 78/a
37047 San Bonifacio - Verona - ITALY
www.ferroli.it