8
INSTALLATION
9
INSTALLATION
Optional accessories
Safety group
Ø 3/4”
Pressure reducing valve
Ø 3/4“
Thermostatic mixer
Ø 3/4”
Expansion vessel
5 litres
ELECTRICAL CONNECTIONS
Power supply principle
The boiler operates on a single-phase supply of 230 V/50 Hz.
You should install a control box with main switch and 6A fuses
externally to the boiler to allow the boiler to be isolated from the supply
for servicing and repairs.
Statutory compliance
The installation must comply with your local standards and codes of
practice.
Safety
The stainless steel if present water tank must be provided with a
separate earth.
The boiler must be isolated from the electrical supply
before any work is carried out on it.
Electrical wiring of N boilers
1. Main switch
2. Summer/Winter switch Thermal reset high-limit thermostat (95°C)
3. Control thermostat (60/90°C)
4. Manual reset high-limit thermostat (103°C max.)
5. Minimum thermostat 45°C (T.O.D)
6. Pump (optional)
7. Room thermostat
Wiring diagram key
B. Blue
Bk. Black
Br. Brown
G. Grey
Or. Orange
R. Red
W. White
Y/Gr. Yellow/Green
230V-50 Hz
6A
N
L1
S3
N T1 T2
L1
B4
S3 B4
N T1 T2
L1
1
2
C
1
2
C
S3
N
T1
T2
L1
t
t
t
M
Br
B
B
R
Y/Gr
Br
Y/Gr
Bk
Or
W
G
B
Br
Y/Gr
B
R
R
B
G
1
2
5
4
3
6
7
W
Or
Or
Bk
Y/Gr
N 1
N 2
N 3
230V-50 Hz
6A
N
L1
S3
N T1 T2
L1
B4
S3 B4
N T1 T2
L1
1
2
C
1
2
C
S3
N
T1
T2
L1
t
t
t
M
N-Mini
4
5
3
6
G
G
R
Or
Or
B
Bk
Br
Br
Bk
B
B
B