Ferroli Domina F 24-30 E, Ferella F 24-30 MEL, MILOS Air Compact E Technical Manual
Supplied By www.heating spares.co Tel. 0161 620 6677
Wall-Mounting Gas Boiler
Airtight Chamber,
for Hot Water
and Heating
TECHNICAL
DOMINA F 24-30 E
FERELLA F 24-30 MEL
MILOS AIR COMPACT E
MANUAL
EDITION
092002
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
1. Technical characteristics and data ......................................................... 3
1.1 Introduction ............................................................................................................3
1.2 Dimensions and connections .................................................................................. 4
1.3 General view and main components ...................................................................... 8
1.4 Technical data table .............................................................................................. 10
2. Product framework and internal components..................................... 11
2.1 Hydraulic circuit - heating..................................................................................... 11
2.2 Hydraulic circuit - tap water ................................................................................. 15
2.3 Gas circuit .............................................................................................................17
2.4 Burner unit ............................................................................................................21
2.5 Fume circuit .......................................................................................................... 23
2.6 Electrical circuit..................................................................................................... 27
3. Operation ............................................................................................ 30
3.1 Operating principle .............................................................................................. 30
3.2 Operating diagram ...............................................................................................31
3.3 Control panel ........................................................................................................ 32
3.4 Adjustments.......................................................................................................... 32
3.5 Setting operating parameters .............................................................................. 33
4. Troubleshooting .................................................................................. 34
2
Version - 09.2002
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
1. TECHNICAL CHARACTERISTICS AND DATA
GENERAL
1.1 Introduction
Our appliance is a high-efficiency heat generator for central heating and hot-water production running
on natural gas or LPG (configurable at the time of installation).
The boiler shell consists of a copper laminar exchanger whose particular shape guarantees high exchange
efficiency under all operating conditions and an open-flue burner equipped with electronic ignition and
ionization flame control.
The boiler is totally sealed off from the installation room: the air needed for combustion is drawn from
outside and the flue gases are expelled by a fan. The boiler outfit moreover includes a variable speed
circulator, expansion tank, flow meter, safety valve, filler cock, air pressure switch, water pressure switch,
temperature sensors and a safety thermostat.
Thanks to the control and adjustment system, unit operation is for the most part automatic. The power
for heating is automatically governed by the control system according to the indoor characteristics, the
characteristics of the building and of its location. The power for hot water is automatically and continually
governed to ensure a fast delivery and comfort under all operating conditions.
There are 5 LEDs on the control panel providing information on the unit's operating status.
General Warnings
Installation and maintenance must be carried out by professionally qualified personnel,
according to current regulations and the manufacturer's instructions.
Incorrect installation or poor maintenance can cause damage or physical injury. The
manufacturer declines any responsibility for damage caused by errors in installation and use
or by failure to follow the manufacturer's instructions given in the instructions manual.
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.
Certification
The CE marking demonstrates that Ferroli gas units conform to the requirements contained in
the applicable European directives.
In particular, this unit complies with the following EU directives:
Gas Appliance Directive 90/396 assimilated with Italian Presidential Decree DPR 15.11.96 no. 661
Efficiency Directive 92/42 assimilated with Italian Presidential Decree DPR 15.11.96 no. 660
Low Voltage Directive 73/23 (amended by 93/68)
Electromagnetic Compatibility Directive 89/336 (amended by 93/68) assimilated with Italian
Presidential Decree DPR 15.11.96 no. 615
Version - 09.2002
3
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
1.2 Dimensions and connections
Domina F 24 E version
Top view
Key
1 System delivery
2 Tap water outlet
3 Gas inlet
4 Tap water inlet
5 System return
4
Bottom view
Version - 09.2002
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
Ferella F 24 MEL version
& Milos Air Compact E version
Top view
Key
1 System delivery
2 Tap water outlet
3 Gas inlet
4 Tap water inlet
5 System return
Version - 09.2002
Bottom view
5
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
Domina F 30 E version
Top view
Key
1 System delivery
2 Tap water outlet
3 Gas inlet
4 Tap water inlet
5 System return
6
Bottom view
Version - 09.2002
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
Ferella F 30 MEL version
Top view
Key
1 System delivery
2 Tap water outlet
3 Gas inlet
4 Tap water inlet
5 System return
Version - 09.2002
Bottom view
7
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
1.3 General view and main components
F 24 E/MEL version
Key
5 Airtight chamber
7 Gas inlet
8 Tap water outlet
9 Tap water inlet
10 System delivery
11 System return
14 Safety valve
16 Fan
19 Combustion chamber
20 Burner unit
21 Main nozzle
22 Burner
26 Combustion chamber insulation
27 Copper exchanger for heating and tap
28 Fume manifold
29 Fume outlet manifold
32 Heating circulator
34 Heating temp. sensor
36 Automatic air vent
42 Tap water temperature sensor
43 Air pressure switch
44 Gas valve
49 Safety thermostat
50 Heating thermostat
56 Expansion tank
63 Heating temperature setting
73 Antifreeze thermostat (optional)
R1-R2-R3-R4 Antifreeze heating elements
74 Heating system cock
81 Ignition electrode
82 Detection electrode
84 1st gas valve operator
85 2nd gas valve operator
90 Fume detection point
91 Air detection point
98 Off-On-Reset switch
114 Water pressure switch
132 Fume deflector
136 Flow meter
145 Water gauge
157 Tap water temperature setting
187 Fume diaphragm
water
(optional)
Version DOMINA - FERELLA - MILOS
8
Version - 09.2002
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
F 30 E/MEL version
5 Airtight chamber
7 Gas inlet
8 Tap water outlet
9 Tap water inlet
10 System delivery
11 System return
14 Safety valve
16 Fan
19 Combustion chamber
20 Burner unit
21 Main nozzle
22 Burner
26 Combustion chamber insulation
27 Copper exchanger for heating and tap
water
28 Fume manifold
29 Fume outlet manifold
32 Heating circulator
34 Heating temp. sensor
36 Automatic air vent
42 Tap water temperature sensor
43 Air pressure switch
44 Gas valve
49 Safety thermostat
50 Heating thermostat
56 Expansion tank
63 Heating temperature setting
73 Antifreeze thermostat (optional)
R1-R2-R3-R4 Antifreeze heating elements
(optional)
74 Heating system cock
81 Ignition electrode
82 Detection electrode
84 1st gas valve operator
85 2nd gas valve operator
90 Fume detection point
91 Air detection point
98 Off-On-Reset switch
114 Water pressure switch
132 Fume deflector
136 Flow meter
145 Water gauge
157 Tap water temperature setting
187 Fume diaphragm
Version DOMINA - FERELLA
Version - 09.2002
9
Supplied By www.heating spares.co Tel. 0161 620 6677
1.4 Technical data table
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
10
Version - 09.2002
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
2. PRODUCT FRAMEWORK AND INTERNAL
COMPONENTS
2.1 Hydraulic circuit heating
Hydraulic diagram for heating
When there is a call for heat, the room thermostat or control system make the burners ignite and the
circulation pump come into operation. The heat contained in the products of combustion is transferred
to the water by the system via the exchanger. For more details on the operating logic, refer to chap.3.
29-187
16
49
27
82
20
42
34
114
14
74
-
+
5
43
50
56
81
44
32
136
Key
5 Airtight chamber
7 Gas inlet
8 Tap water outlet
9 Tap water inlet
10 System delivery
11 System return
14 Safety valve
16 Fan
20 Burner unit
27 Heat exchanger
29 Fume outlet collar
32 Heating circulator
34 Heating temperature sensor
42 Tap water temperature
sensor
43 Air pressure switch
44 Gas valve
49 Safety thermostat
50 Heating thermostat
56 Expansion tank
74 Heating system cock
81 Ignition electrode
82 Detection electrode
114 Water pressure switch
136 Flow meter
187 Fume diaphragm
10
Version - 09.2002
8
7
9
11
11
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
Circulator (230v/50Hz)
Located on the heating circuit return, it is connected directly to the exchanger
via special forks and connected to the system via a threaded brass section.
It has three delivery/head levels (see diagram). Changing the delivery/head
changes the speed of the water flowing through the boiler exchanger and as
a result the temperature difference ( T) between heating delivery and
return. Clearly, increasing the delivery of the circulator decreases T and vice
versa. If it is not used for a long time, the impeller might jam due to debris
in the water. With the front screw it is possible to access the impeller, which
can be freed with the aid of a screwdriver. The connection to the expansion
tank and the air separator is installed on the pump casing.
Checks
If the pump doesn't work:
Check that the impeller is free to turn by turning the screw on the front
with a screwdriver.
Check that both the card and the pump connection are powered.
If there is no power supply, check the card.
If there is power, change the pump.
Key
1 - 2 - 3 = Pump selector position
A = Losses of head 24kW version
B = Losses of head 30kW version
Air separator
This is used to expel the air in the heating circuit automatically. On boilers
with a twin heat exchanger, it is located on the pump casing. It is normally
accessible either via the fork or by simply unscrewing it from its seat.
12
Version - 09.2002
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