Ferroli DOMIcompact F 24 D Troubleshooting guide

wall-mounted gas fired,
for hot water and heating
DOMIcompact F 24 D
INSTRUCTIONS FOR USE, INSTALLATION AND MAINTENANCE
FOR THE UNITED KINGDOM &EIRE
cod. 3540B61/1 - 04/2006


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DOMIcompact F 24 D
IMPORTANT
Your "benchmark" Installation, Commissioning and Service Record Log Book is enclosed in the
last pages of this manual. “This record must be completed and left with the end user”.
Ferroli is a member of the Benchmark initiative and fully supports the aims of the programme.
Benchmark has been introduced to improve the standards of installation and commissioning of central
heating systems in the UK and to encourage the regular servicing of all central heating systems to
ensure safety and efficiency.
Please see installation and servicing guidelines.
For EIRE (Southern Ireland) it is necessary to complete a “Declaration of Conformity” to indicate
compliance to I.S. 813. An example of this is given in the current edition of I.S. 813. In addition it is
necessary to complete the “Benchmark” logbook.
• Read the warnings given in this manual thoroughly.
They provide important information for safe instal-
lation, use and maintenance
• The instruction manual, by law must be left with the
end user.
• If the appliance is sold or transferred to another
owner or if the owner moves, leaving the appliance
behind, always ensure that the manual is kept with
the appliance for consultation by the new owner
and /or installer.
• Incorrect installation or poor maintenance absolves
the manufacturer from all liability for damage to
persons and property.
• Installation and maintenance must be carried out
in accordance with current legislation, according
to the manufacturer’s instructions and by qualified
corgi registered engineer.
• Before service or maintenance work is carried out
isolate the appliance from the mains electricity
supply.
• In the event of malfunction or faulty operation, iso-
late the appliance. Do not attempt to repair or carry
out any other operation on the appliance directly.
Contact Ferroli or a qualified engineer only.
• Repairs or the replacement of components must be
carried out exclusively by qualified personnel using
original spare partsonly. Failure toadhere to theabove
may compromise the safety of the appliance.
• To guarantee efficient operation, the appliance must
be serviced once a year by a Corgi registered engi-
neer.
• The appliance may not be used for purposes other
than those for which it was explicitly designed.
• Incorrect installation and use or failure to follow the
instructions provided by the manufacturer absolve
the manufacturer from all liability for damage.
• After unpacking, check that the contents are correct
and undamaged.
• Keep packing out of reach of children as it could be
potentially hazardous.
• To clean external parts, use a damp cloth moistened
with soapy water if necessary. Avoid using abrasive
cleaning products and solvents.
This symbol indicates “Caution” and is placed next to all safety information.
Strictly follow these instructions in order to avoid danger and damage to persons
or property.
This symbol calls attention to a note or important information, please read thou-
rougly.
President and Legal Representative
Cav. del Lavoro
Dante Ferroli




Declaration of conformity
Manufacturer: FERR LI S.p.A.
Address: Via Ritonda 78/a 37047 San Bonifacio VR Italy
declares that this unit complies with the following EU directives:
Gas Appliance Directive 90/396
Efficiency Directive 92/42
Low Voltage Directive 73/23 (amended by 93/68)
Electromagnetic Compatibility Directive 89/336 (amended by 93/68)

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DOMIcompact F 24 D
1. OPERATING INSTRUCTIONS .................................................................4
1.1 Introduction ............................................................................................................4
1.2 Control panel ..........................................................................................................5
1.3 Turning on and off ..................................................................................................6
1.4 Adjustments ............................................................................................................6
1.5 Maintenance............................................................................................................8
1.6 Faults.......................................................................................................................8
2. INSTALLATION.......................................................................................9
2.1 General Instructions................................................................................................9
2.2 Boiler location .......................................................................................................10
2.3 Boiler water connections ......................................................................................12
2.5 Electrical Connections ..........................................................................................14
2.4 Connection to the gas system..............................................................................14
2.6 Flue system ...........................................................................................................16
3. Service and maintenance......................................................................24
3.1 Adjustments ..........................................................................................................24
3.2 Initial start-up........................................................................................................26
3.3 Maintenance..........................................................................................................27
3.4 Troubleshooting....................................................................................................29
4 Technical characteristics and data .........................................................30
4.1 Dimensions and connections ................................................................................30
4.2 General view and main components ....................................................................31
4.3 Hydraulic diagram.................................................................................................32
4.4 Technical data table..............................................................................................33
4.5 Diagrams ...............................................................................................................34
4.6 Time Clock (optional) ............................................................................................35
4.7 Wiring diagram .....................................................................................................36
Benchmark................................................................................................37
cod. 3540B61/1


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DOMIcompact F 24 D
1. OPERATING INSTRUCTIONS
1.1 Introduction
Dear Customer,
Thank you for choosing DOMIcompact F 24 D, a FERROLI wall-mounting boiler featuring advanced
design and technology, high reliability and quality construction. Please read this manual carefully and
keep it for future reference.
DOMIcompact F 24 D is a high-efficiency appliance for heating and hot water production running on
natural or liquefied petroleum gas (configurable at the time of installation) and regulated by an advanced
microprocessor control system.
The boiler shell consists of a primary copper laminar heat exchanger and burner equipped with electronic
ignition and ionization flame control.
The boiler is totally room sealed from the installation room: the air required for combustion is drawn
from outside. The boiler also includes a fan, modulating gas valve, pump, expansion vessel, flow switch,
safety valve, temperature sensors, a safety thermostat and a low pressure switch.
Thanks to the microprocessor control and adjustment system with advanced self-diagnosis, unit ope-
ration is for the most part automatic. The power for heating is automatically governed by the control
system combined with the room thermostat (not supplied) The power for hot water is automatically and
continually governed to ensure a fast delivery and comfort under all operating conditions.
The user only has to set the temperature desired inside the home (by means of an optional room
thermostat or remote control, which is required under the building regulations 2002) or regulate the
temperature of the system, and set the desired outlet temperature for the hot water. The adjustment
and control system will provide optimum operation throughout the year.
The display continuously provides information on the unit’s operating status and it is possible to obtain
additional information on the sensor temperatures, set-points, etc, or configure them. Any operating
problems associated with the boiler are immediately signalled by the display and, if possible, corrected
automatically.

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DOMIcompact F 24 D
1.2 Control panel
The control panel is composed of a multi-function button, two knobs and a display.
Key
1Heating temperature adjustment and Summer/
Winter/ switch off control
2Hot water temperature adjustment and switch
off control
3Multi-function button (ECO/RESET/TEST)
4Temperature display
During operation or standby in heating mode,
it displays the temperature of the heating
sensor. During hot water operation, it displays
the temperature of the hot water sensor.
5Heating demand symbol
Appears during heating operation or when
adjusting the heating set-point temperature
6Flame symbol
Appears when the burner is on
7ECO symbol
ECO is displayed when the Economy function is on
8Hot water demand symbol
Appears during hot water operation or when adjusting the hot water set-point temperature
Fig. 1
Boiler on stand-by
Boiler on stand-by / EC
Heating operation
(burner on)
Hot tap water operation
(burner on)
Fault codes (See chap. 1.6 or 3.0)
TEST mode operation
(burner on)
Boiler off
Display Type of operation
(Frost protection active)
(No demand from heating or Hot water)
(Displays heating flow temperature)
(Displays Hot water temperature)
(Displays relevant fault code)
(For comissioning purposes only)
Information during operation
During normal operation, the boiler diagnostics display the running information or boiler status on the
control panel (Fig.1).see below.

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DOMIcompact F 24 D
1.4 Adjustments
Boiler off Boiler in Summer operation
(only hot water production is active)
Boiler with only heating on and hot
water off (Display indicates heating demand)
Boiler in Winter operation
(Display indicates hot water demand)
1.3 Turning on and off
Ignition
• Open the gas isolation valve on the boiler.
• Purge the air from the pipe work to the gas valve.
• Turn on the 3amp electrical switch or insert the plug to the
boiler.
• Turn the heating and hot water control knobs onto their required
temperatures (see par. 1.4).
• The boiler is now ready to function automatically whenever hot
water is drawn or both the time clock and room thermostat call
for heating.
Turning off
Turn the knobs (ref. 1 and 2 Fig. 1) onto minimum.
If the boiler is turned off this way, then the P.C.B is still powe-
red.
Hot water and heating operation are disabled, the display shows
; but the frost protection function remains active
The frost protection will not work if the electricity and/or gas supply to the unit are cut off.
To avoid damage caused by freezing during long shutdowns in winter, it is advisable to drain all
water from the boiler, the tap water and the system water; or drain off just the tap water and
add a suitable antifreeze to the heating system, as prescribed in chap. 2.3.
Summer/winter Switchover
Depending on the position of the control knobs “1” and “2” it is possible to switch off the boiler unit,
switch between summer and winter operation or turn off the domestic hot water .

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DOMIcompact F 24 D
Switching off the boiler. Switching between summer and winter operation has priority over the
heating only time control (optional) when this is connected to the boiler.
C.H. temperature setting
To set the system delivery temperature, turn the knob (ref. 1- Fig. 1).
It can vary from a minimum of 30 °C to a maximum of 85°C; however, it is advisable not to operate the
boiler below 45 °C. When the knob is turned the display lights up, the radiator symbol flashes and the
temperature displayed will be the temperature actually set. On completing this operation, the display
will stay on for another 5 seconds and then go back to the actual operating temperature providing
there is a demand.
Domestic Hot water temperature adjustment
To set the tap water temperature, turn the knob (ref. 2- Fig. 1).
It can vary from a minimum of 40 °C to a maximum of 55 °C. When the knob is turned the display lights
up, the tap symbol flashes and the temperature displayed will be the temperature actually set. On
completing this operation, the display will stay on for another 5 seconds to then go back to the actual
operating temperature providing there is a demand.
If the boiler is connected to the optional remote open therm control, the above adjustments
(system and hot water temperature) can only be made with the remote control.
ECO/COMFORT selection
The unit is equipped with a special internal device that ensures a high hot-water delivery speed and
excellent user comfort. When comfort mode is active the water in the boiler is maintained at a pre-
determined temperature, which means that hot water is available at the boiler outlet as soon as a tap
is opened, ie with no waiting.
The user can turn the device off (ECO mode) by pressing the multi-function button for 2 seconds with
the boiler on standby. In ECO mode the display shows the relevant symbol. To turn on COMFORT mode,
press the multi-function button again for 2 seconds, the ECO symbol will vanish from the display.
TEST MODE selection
Pressing the multi-function button 3 times in 3 seconds turns on TEST mode (the heating and hot
water symbols flash simultaneously - see par. 3.1). If TEST mode is turned on by accident, press
the button 3 times in 3 seconds again to exit (Test time 15 minutes unless cancelled early).

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DOMIcompact F 24 D
1.5 Maintenance
It is strongly recommended to carry out annual maintenance on the boiler and the heating system. Please
refer to the “maintenance” section in this manual.
The casing, the control panel and the aesthetic parts of the boiler can be cleaned using a soft and damp
cloth.
Do not use abrasives or solvents.
1.6 Faults
The boiler is equipped with an advanced self-diagnosis system that signals any faults on the display.
Some faults (from F1 to F3) cause a boiler shutdown. In this case, operation must be reset manually by
pressing the multi-function button (RESET) for 1 second
Other faults (from F5 to F37) cause temporary shutdowns that are automatically reset as soon as the
value causing the fault comes back within the boiler’s normal working range.
Listed below are some anomalies that can be caused by simple, user-solvable problems.
If the problem remains after two attempts at resetting, contact the Ferroli Service Centre.
For other faults, refer to section 3.4 “Troubleshooting”.
Before calling a Ferroli service engineer, check that the problem is not due to there being no
gas or electricity, or low system pressure.
Boiler shutdown
Low system pressure
Make sure that the gas cocks ahead of the boiler and on the
meter are open.
Press the multi-function button (for 1 second) (fig.1)
In case of repeated shutdowns, contact the nearest assistance
centre.
Fill the 'system to 1-1.5 bar cold by means of the 'specific
cock located near the boiler.
Close the cock after 'use.
Fault CureDisplay code

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DOMIcompact F 24 D
2. INSTALLATION
2.1 General Instructions
This device must only be used for the purpose for which it is specially designed. This unit is
designed to heat water to a temperature below boiling point and must be connected to a hea-
ting system and/or a water supply system for domestic use, compatible with its performance,
characteristics and its heating capacity. Any other use is considered improper.
BOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSONNEL, IN ACCORDANCE
WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE PROVISIONS OF CURRENT
LAW, THE RECOMENDATION OF BS STANDARDS, ANY LOCAL REGULATIONS AND THE RULES OF
COMPETENT WORKMANSHIP.
In IE, the installation must be carried out by a Competent Person and installed in accordance with the
current edition of I.S. 813 “Domestic Gas Installations”, the current Building Regulations and reference
should be made to the current ETCI rules for electrical installation.
Incorrect installation can cause damage or physical injury for which the manufacturer declines any
responsibility.
This appliance must be installed strictly in accordance with these instructions and
regulations:
The Gas Safety Regulations (Installations & Use).
The Local Building Regulations.
The Building Regulations (Part L).
The Buildings Standards (Scotland - Consolidated) Regulations.
British Standards Codes of Practice:
B.S. 5440 Part 1 Flues
B.S. 5440 Part 2 Air supply
B.S. 5449 FORCED CIRCULATION HOT WATER SYSTEMS
B.S. 6798 INSTALLATION OF GAS FIRED HOT WATER BOILERS
B.S. 6891 GAS INSTALLATIONS
B.S. 7671 IEE WIRING REGULATIONS
B.S. 4814 SPECIFICATION FOR EXPANSION VESSELS
B.S. 5482 INSTALLATION OF LPG
B.S. 3632 RESIDENTIAL PARK HOMES
B.S. 7593 TREATMENT OF WATER IN DOMESTIC HOT WATER CENTRAL HEATING SYSTEMS
B.S. 5546 INSTALLATION OF HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
I.S. 813 DOMESTIC GAS INSTALLATIONS (EIRE ONLY)
Local Water Bye Laws
B.S. 5955-8 PLASTIC PIPEWORK INSTALLATION
For Northern Ireland the rules in force apply

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DOMIcompact F 24 D
Minimum
A
B
D
5 cm
20 cm
60 cm
(via an openable panel)
C20 cm
Table 1
fig. 2
fig. 3
D
A A
B
C
2.2 Boiler location
The boilers combustion chamber is sealed off from the installation room. The installation room must be
sufficiently well ventilated to prevent any dangerous conditions from forming in the event of even slight
gas leakage. This safety standard is required by the EEC Directive no. 90/396 for all gas units, including
those with a so-called sealed chamber.
Therefore the place of installation must be free of dust, flammable materials or objects or corrosive
gases. The room must be dry and not subject to freezing.
The boiler is design to be installed on a solid wall. The wall fixing must ensure a stable and effective
support for the appliance, using the bracket and fixings supplied.
If the unit is enclosed in a cupboard or mounted alongside, there must be space for normal maintenance
work. Fig. 2 and tab. 1 give the minimum clearances to leave around the unit.
This appliance does not require compartment ventilation for combustion purposes
Drilling Template
Select suitable mounting position for boiler, using the template mark flue outlet and boiler mounting
points. Drill two 10mm holes 70mm deep to accept the wall plugs. Fit the supplied wall plugs on the
left and right side drill and fit the special wall plug in the middle (fig. 3). Fix the wall bracket to the wall
using standard lock nuts (M8) on both sides. Using a Core drill cut a 118mm diameter hole for the flue
as detailed on page 17. Mount the boiler on the wall bracket and secure using the special antitheft nut
(M8) as described in the fig. 3.