Page 1
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GN1 N
CAST IRON HIGH EFFICIENCY SECTIONAL BOILER,
FOR GAS/OIL FUELS
3544083/1 - 03/2002
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General instructions
• Read the warnings given in this manual thoroughly.
They provide important information for safe
installation, use and maintenance.
• Keep the manual carefully for future consultation.
• The instruction manual is an integral and essential
part of the product and must be kept by the 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
people or things.
• Installation and maintenance must be carried out
in conformity with current legislation, according
to the manufacturer's instructions and by qualified
personnel.
• Before cleaning or maintenance, disconnect the
appliance from the mains via the switch on the
appliance or a suitable isolating device.
• In the event of malfunction or faulty operation,
deactivate the appliance. Do not attempt to repair
or carry out any other operation on the appliance
directly. Contact qualified personnel only.
• To guarantee efficient operation, the appliance
must be serviced once a year by an authorised
service centre.
• The appliance may not be used for purposes
other than those for which it was explicitly
designed. Any other use is considered improper
and therefore dangerous.
• 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
whole and undamaged.
• Keep packaging out of reach of children as it is
potentially hazardous.
• To clean external parts, use a damp cloth
moistened with soapy water if necessary. Avoid
using abrasive cleaning products and solvents.
• Repairs or the replacement of components must
be carried out exclusively by qualified personnel
using original spare parts only. Failure to respect
the above may compromise the safety of the
appliance.
Mars
The CE mark indicates that the appliance
satisfies all the essential requisites of the gas
appliance directive (90/396/CEE) and the
technical standards referred to.
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Index
1. T echnical infor mations ........................................................................................................................... 4
2. Dimensions and technical data ............................................................................................................. 5
3. Packing and shipment ........................................................................................................................... 6
4. Installation ............................................................................................................................................. 7
5. T esting ...................................................................................................................................................8
6. Service ...................................................................................................................................................9
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1. TECHNICAL INFORMATIONS
1.01 Introduction
GN1 N boiler is a new heating generator with high efficiency, for central heating system as well sanitary hot water
production suitable for burners using oil or gas.
The boiler body is built by cast iron sections joined togheter by mean of biconical nipples and tie rods. Sections fins
are especially developed to achieve the best efficiency of the boiler in order to save on fuel consumption. The boiler
body insulation is provided by mineral high density fibers that minimizes the body heat lost.
1 3 452
Key
1 Timer sochet
2 Thermomanometer
3 Security thermostat manual resetting
4 Main switch
5 Control thermostat
Fig. 1
1.02 Control and securities devices operation
Regulating thermostat, manual resetting 3 (fig. 1)
It operates when the boiler temperature, during the heating mode reach such a level that can use a danger situation.
Before resetting this thermostat ask for Qualified Serviceman to inspect the appliance.
Central thermostat 5 (fig. 1)
It allows to control the boiler temperature by mean of its knobs.
This thermostat controls the burner.
Room thermostat (not supplied)
This device is not supplied, but can be fitted by installer, it is connected in series to the control thermostat and it
manages both the burner and the circulating pump during the heating mode. The use of such appliance is advised
to get a better comfort as well on energy saving.
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2. DIMENSIONS AND TECHNICAL DATA
2.01 Dimensions and technical data (fig. 2 - tab. 1)
400
Ø
850
B
270
A
a1
1” 1/2
711
542
1” 1/2
1/2”
80
64
Key
a1 Flow 11/2"
a2 Return 11/2"
a3 Boiler drain 11/2"
Heat and
D.H.W.
Model
(gross)
gas
Max.
GN1 N 02
GN1 N 03
GN1 N 04
GN1 N 05
GN1 N 06
GN1 N 07
GN1 N 08
Model
GN1 N 02
GN1 N 03
GN1 N 04
GN1 N 05
GN1 N 06
GN1 N 07
GN1 N 08
28,6
43
57,3
71,6
86,1
100,4
114,7
Working
pressure
bar
4
4
4
4
4
4
4
Heat and
D.H.W.
(net)
gas+oil
Max.
25,8
38,7
51,6
64,5
77,5
90,4
103,3
300
400
500
600
700
800
900
A
Heat and
D.H.W.
output
Max.
23,3
34,9
46,5
58,1
69,8
81,4
93,0
105
105
105
105
125
125
125
Fig. 2
Heat and
B
D.H.W.
(gross)
gas
Min.
18,2
18,2
39,3
49,1
59,1
68,8
78,6
130
130
130
180
180
180
180
Heat and
Ø
D.H.W.
(net)
gas+oil
Min.
16,4
16,4
35,4
44,2
53,2
62,0
70,8
Combustion
chamber
load loss
∆p mbar
0,2
0,2
0,2
0,2
0,2
0,2
0,2
Heat and
D.H.W.
output
Min.
15,0
15,0
32,5
40,5
48,8
57,0
65,0
N°
element
2
3
4
5
6
7
8
Combustion
chamber
volume
3
dm
12,09
20,15
28,21
36,27
52,39
60,45
68,51
Water
capacity
dm
11
14
17
20
23
26
29
a2
3
∆t
10
1
1,8
4,2
7,2
11
15
20
85
Combustion
chamber
lenght
mm
286
386
486
586
686
786
886
Water
load losses
a3
Combustion
chamber
dimension
Ømm
260x310
260x310
260x310
260x310
260x310
260x310
260x310
Weight
of unit
∆t
20
-
-
1
1,6
2,3
3,3
4,5
kg.
100
125
150
175
200
225
75
N.B.: - Max. water temperature for the heating system is 90° C. - Min. water temperature for the heating system is
45° C.
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2.02 Pressure drop (fig. 3)
Pressure drops according to the boiler size are specified on the following diagram and refer to temperature
difference between flow and return comprises between 10 and 20°C.
Fig. 3
3. PACKING AND SHIPMENT
Boiler is delivered complete assembled in a wood crate.
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Fig. 4
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4. INSTALLATION
It is law that all gas appliances are installed by Competent Persons, in accordance with the regulations. Failure to
install appliances correctly lead to prosecution, it is your own interest, and that of safety, to ensure that the law is
coplied with. Manufacturers instructions must NOT be taken in any way as over-riding statutory obligations, special
care must be paid to conform with law and regulation concerning building and location of the chimney.
4.01 Electrical connection
Proceed to wire pump, burner and optional room thermostat. According to the wiring diagrams (fig.5) and to the
directions attached to the cables. It is recommended to install a two-pole switch between the power supply and the
boiler. The switch contacts must have a clearance of at least 3 mm and fuses of 5 A max must be provided.
N.B. - Appliance must be earthed.
It is recommended to connect the boiler to a good electric earth system.
FERROLI could not be considered responsable for any kind of damage to Persons or things caused by
failure of earthing the system.
159
98
a
13
c
d
4
63
C
2
1
49
2
c
123 4 56 7 8 9 101112
123 4 56 7 8 9 101112
LN
230V 50Hz
160
32
72
L1
Key
32 Central heating pump
49 Overheat cut-off thermostat
63 C.H. boiler thermostat
72 Room thermostat (not fitted)
98 Switch
159 Test knob
160 Auxiliary contact
189 Boiler shut down warming
211 Burner connector
Fig. 5a
Note = Dotted lines indicate connections to be performed during installation
14192345678 1011 12 13
15 16
189
N
S3T1
B4
T2
211
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Electrical diagram
1
L
230V
50Hz
1a
1
9
160
10
11
72
12
10
11
159
98
4
N
2
3C
3
63
d
C
4
2
1
2
16
3
4
5
189
2
49
c
13
5
14
15
7
B4
S3
T2
T1
N
L1
32
211
8
6
Key
32 Central heating pump
49 Overheat cut-off thermostat
63 C.H. boiler thermostat
72 Room thermostat (not fitted)
98 Switch
159 Test knob
160 Auxiliary contact
189 Boiler shut down warming
211 Burner connector
Fig. 5b
Note = Dotted lines indicate connections to be performed during installation
4.02 Hydraulic connections
Boiler must be connected to the system according to boiler back part indications and those provided at fig. 2. Pipe
must be free of any kind of strain and security valves must be provided in both central heating system and domestic
hot water system location of such security valves be as close is possible to the boiler and between the boiler and valve
no obstructions or gate valves must be placed.
The boiler is not supplied with expansion tank it has to be provided during the boiler installation. It is advised that
the pressure in the hydraulic system has to be between 0,5 and 1 bar measured in cold water condition.
4.03 Connection to the chimney
It is recommended to connect the boiler to a good working chimney built according to the regulations. The
connection between boiler and chimney must be done by using suitable material proof against high temperature and
corrosion. Where flue sections have to be connected it is advised pay attention to avoid leaking and provided good
insulation through all the flue length to avoid condensing problem.
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5. TESTING
5.01 Before the first light of the boiler
Before the first light of the boiler follow these check list:
a) check the system is filled with water at the right pressure;
b) check against any leakage of water fuel;
c) check that the correct electric power is supplied to the unit;
d) check size and perfect flue installation;
e) check against any type of flammable materials where the boiler is installed;
f) check the burner has the right heat input according to the boiler size;
g) control that the water valves are open.
5.02 First lighting
After the boiler preliminaries checking , the appliance can be lights in the following way;
1) Open the fuel gate valve.
2) Set the regulating thermostat at the required temperature level.
3) Give electric power to the boiler and switch on the main switch 4 (fig. 1) on the boiler control panel.
After above operations the burner will start to run and the boiler will begin to work.
5.03 After the first lighting
After the first lighting it is advisable check:
burner works properly, this checking must be done by appropriate instruments.
Thermostats operate correctly.
Water flows through the system.
Smoke gases evacuate through the flue duct.
5.04 Switch off
To turn off the unit for a short period it is enough to switch off the switch 4 (fig. 1) on the control panel.
If the boiler has to be stopped for long period beside to act by the switch 4, it is necessary to cut the supply
of fuel by mean of the gate valve, in winter season, to avoid damages due to the frost it is necessary to
add the antifrost liquid in the system or to drain it completely.
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6. SERVICE
The after sale service must be carried out only Qualified Plumbers. It is advise to service the boiler at least once a
year, before the winter season. Check must include the boiler cleaning, the perfect operation of the controls and the
burner.
Furthermore the flue duct conditions have to be inspected.
6.01 Boiler cleaning
Cut out electric power.
The front panels 1, 2, 3 (fig. 6).
Clean the boiler internal parts.
Check the flue duct and if necessary clean it.
The burner service must be done according the Manufacture Instructions.
Tube Brush
Fig. 6
1
2
3
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ALL SPECIFICATIONS SUBJECT TO CHANGE
Please note - to avoid incurring unnecessary expense, in the event of a boiler shut down, check
this in not caused by lack of electricity supply, gas supply or low water pressure before calling
our Customer Service Helpline.
Lichfield Road, Branston Industrial Estate, Burton Upon Trent, Staffordshire DE14 3HD
Tel. 08707 282 885 - Fax 08707 282 886
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