Ferroli Domina Oasi F 24 E, Ferella Boil F 24 MEL, Kea Air Compact E, Domina Oasi F 30 E, Ferella Boil F 30 MEL Technical Manual
DOMINA OASI F 24-30 E
FERELLA BOIL F 24-30 MEL
KEA AIR COMPACT E
Wall-Mounting
Gas Boiler
Airtight Chamber,
for Heating and Hot
Water with
Integrated Boiler
TECHNICAL
MANUAL
•
•
EDITION
09•2002
2
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
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
3
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
1. GENERAL TECHNICAL CHARACTERISTICS
AND DATA
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 stainless steel boiler of 55 or
65 litres for tap water, a variable speed circulator and a fixed speed circulator, an expansion tank for heating
and for the boiler, safety valve, filler cock, air pressure switch, water pressure switch, temperature sensors,
limiting and safety thermostats.
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 tap water capacity is ensured by a boiler that is kept
at the required temperature.
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
4
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
1.2 Dimensions and connections
Domina Oasi F 24 E version
600
370
800
810
570
85 285
75 85
90
85
80
80
85
120 55 170 100 65 55
35
123 456
Key
1 Gas inlet
2 3/4" System delivery
3 3/4" System return
4 1/2” Hot tap water
5 1/2” Cold tap water
6 1/2” Outlet/Recirculation
Top view
Bottom view
5
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
Ferella Boil F 24 MEL version
& Kea Air Compact E version
600
370
800
810
570
85 285
75 85
90
85
80
80
85
120 55 170 100 65 55
35
123 456
Key
1 Gas inlet
2 3/4" System delivery
3 3/4" System return
4 1/2” Hot tap water
5 1/2” Cold tap water
6 1/2” Outlet/Recirculation
Top view
Bottom view
6
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
Domina Oasi F 30 E version
600
450
800
810
570
85 365
75 85
90
85
80
80
85
120 55 170 100 65 55
35
123 456
Key
1 Gas inlet
2 3/4" System delivery
3 3/4" System return
4 1/2” Hot tap water
5 1/2” Cold tap water
6 1/2” Outlet/Recirculation
Top view
Bottom view
7
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
Ferella Boil F 30 MEL version
600
450
800
810
570
85 365
75 85
90
85
80
80
85
120 55 170 100 65 55
35
123 456
Key
1 Gas inlet
2 3/4" System delivery
3 3/4" System return
4 1/2” Hot tap water
5 1/2” Cold tap water
6 1/2” Outlet/Recirculation
Top view
Bottom view
8
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
Key
5 Airtight chamber
7 Gas inlet
8 Tap water outlet
9 Tap water inlet
10 System delivery
11 System return
14a 3-bar safety valve (heating)
14b 7-bar safety valve (boiler)
16 Fan
19 Combustion chamber
20 Burner assembly
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 Delivery temperature sensor
36 Automatic air vent
40 Tap water expansion tank
43 Air pressure switch
44 Gas valve
49 Safety thermostat
50 Heating thermostat
56 Expansion tank for heating system
63 Heating temperature setting
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
97 Magnesium anode
98 Off-On-Reset switch
114 Water pressure switch
130 Boiler circulator
132 Fume deflector
145 Water gauge
151a Boiler drain cock
151b System drain cock
155 Boiler temperature sensor
157 Tap water temperature setting
179 Check valve
180 Boiler
187 Fume diaphragm
192 Recirculation (when connecting, insert a
T-junction to connect the drain cock)
1.3 General view and main components
F 24 E/MEL version
0
5
1
2
3
4
6
145
179
16 43 563629
187
28
91
90
27
50
49
19
81
82
26
22
20
5
21
114
44
85
84
130
7 14a 10 11 32 74 8180
9
34
40
155
132
192 14b
98 63 157
97
151a
151b
DOMINA OASI – FERELLA BOIL
KEA AIR COMPACT E version
9
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
F 30 E/MEL version
145
0
5
1
2
3
4
6
179
16 43563629
187
28
91
90
27
50
49
19
81
82
26
22
20
5
21
114
44
85
84
130
7 14a 10 11 32 180
34
40
155
132
98 63 157
9
74 8
14b97
192 151a
151b
DOMINA OASI - FERELLA BOIL Version
Key
5 Airtight chamber
7 Gas inlet
8 Tap water outlet
9 Tap water inlet
10 System delivery
11 System return
14a 3-bar safety valve (heating)
14b 7-bar safety valve (boiler)
16 Fan
19 Combustion chamber
20 Burner assembly
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 Delivery temperature sensor
36 Automatic air vent
40 Tap water expansion tank
43 Air pressure switch
44 Gas valve
49 Safety thermostat
50 Heating thermostat
56 Expansion tank for heating system
63 Heating temperature setting
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
97 Magnesium anode
98 Off-On-Reset switch
114 Water pressure switch
130 Boiler circulator
132 Fume deflector
145 Water gauge
151a Boiler drain cock
151b System drain cock
155 Boiler temperature sensor
157 Tap water temperature setting
179 Check valve
180 Boiler
187 Fume diaphragm
192 Recirculation (when connecting, insert a
T-junction to connect the drain cock)
10
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
1.4 Technical data table
Gas supply Pmax Pmin
Heating Power (Net Heat Value - Hi)
Useful Heating Power 80˚C - 60˚C
Hot Water Heating Power
Powers Pmax Pmin
kcal/h 20,200 8,300
kW 23.5 9.7
kcal/h 20,200 8,300
kW 23.5 9.7
kcal/h 22,200 9,900
kW 25.8 11.5
Dimensions, weights connections
Depth mm 370
Width mm 600
Height mm 800
Hot water
Minimum working pressure in hot water production bar 0.25
Maximum working pressure in hot water production bar 9
Specific flow rate with ∆t 30˚C l/10 min 150
Specific flow rate with ∆t 30˚C l/min 15
Boiler water content litres 1.5
Expansion tank pre-filling pressure bar 1
Expansion tank capacity litres 6
Minimum working pressure in heating bar 0.8
Maximum working pressure in heating bar 3
Maximum working temperature in heating ˚C 90
Electrical protection rating IP 44
Power voltage/frequency V/Hz 230/50
Max electrical power absorbed W 125
Hot water circuit connections inches 1/2”
Heating system connections inches 3/4”
Gas system connection inches 1/2”
Weight with packing kg 52
Heating
Natural Gas delivery (G20) nm
3
/h 2.73 1.22
Natural Gas main nozzles (G20) mm 12 x 1.30
Pressure at Natural Gas burner (G20) mbar 11.8 2.5
Natural Gas supply pressure (G20) mbar 20.0
LPG burner (G31) Kg/h 2.00 0.89
LPG main nozzles (G31) mm 12 x 0.77
Pressure at LPG burner (G31) mbar 35.0 7.8
LPG supply pressure (G31) mbar 37.0
Safety valve bar 3
Hot water content litres 55
Pmax Pmin
Pmax Pmin
25,800 10,900
30.0 12.7
25,800 10,900
30.0 12.7
28,500 12,500
33.1 14.5
450
600
800
0.25
9
190
19
1.8
1
10
0.8
3
90
44
230/50
125
1/2”
3/4”
1/2”
60
3.50 1.53
16 x 1.25
13.0 2.5
20.0
2.57 1.13
16 x 0.75
35.5 7.0
37.0
3
65
DOMINA OASI - FERELLA BOIL - KEA COMPACT E- MILOS 24 Kw 30 Kw
Electrical power supply
11
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
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.
20
82
5
29-187
16
-
+
44
7
81
43
32
14
114
34
11 10
49
50
222
36
97
155
130
179
179
74
8
9 192
151
56
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 assembly
29 Fume outlet manifold
32 Heating circulator
34 Heating temperature sensor
36 Automatic air vent
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
97 Magnesium anode
114 Water pressure switch
130 Boiler circulator
151 Boiler drain cock
155 Boiler temperature sensor
179 Check valve
187 Fume diaphragm
192 Recirculation
222 Copper exchanger
12
DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
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 fitting. 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
m
C.A.
m3/h
0,5
1
1,5
2
2,5
3
3,5
4
0,6 0,8 1 1,2 1,4 1,6 1,8 2 2,2 2,4 2,6
4,5
5
5,5
6
2,8 3 3,2 3,4 3,6 3,8 40,40,2
0
0
1
2
3
B
A
Air separator and automatic air vent
This is used to expel the air in the tap-water and heating circuit automatically.
It can be removed by simply unscrewing it from its seat on the air separator. The
function of the latter is to slow down the speed of the water, preventing the air
it contains from getting dragged along.
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