14
ECONCEPT 100
OFF
ON
OFF
ON
Generator 1
Generator 2
123456789
10
11
12
Operation enabling
signal
External sensor
Sequence adj.
connection
(OpenTherm)
Operation enabling
signal
External sensor
Sequence adj.
connection
(OpenTherm)
L
N
230V
50Hz
12-pole connector
6-pole connector
S3
T2
T1
Fig. 9
2.5 Electrical Connections
The unit must be installed in conformity with current national and local regulations.
Connections 230 Vac (6-pole connector)
Connection to the power mains
The generator must be connected to a single-phase power supply, 230 Volt-50 Hz, through the terminals
L, , and N.
Appliance electrical safety is only guaranteed when correctly connected to an efficient earthing system
executed according to current safety standards. Have the efficiency and suitability of the earthing
system checked by professionally qualified personnel. The manufacturer declines any liability for
damage caused by failure to earth the system. Also make sure the electrical system is adequate for
the maximum power absorbed by the unit, as specified on the boiler dataplate, in particular ensur-
ing that the section of the system’s cables is suitable for the power absorbed by the unit.
The generator is not provided with a cable for connection to the power mains. Connections to the mains
must be made with a permanent connection and equipped with a bipolar switch with contact opening dis-
tance of at least 3 mm, interposing fuses of max. 3A between the boiler and the line. Make sure to respect
the polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow/green wire) in making connections
to the power mains.
The generator power cable must of type “HAR H05 VV-F” 3x0.75 mm
2
with max. outside diameter
of 8 mm. If the cable is damaged, switch off the unit and have it changed only by professionally
qualified personnel.
Fault signalling output connection
The 230 Vac output for signalling faults of
boiler shell 1
is connected to terminals T1 (line) and T2 (neutral).
The 230 Vac output for signalling faults of
boiler shell 2
is connected to terminals S3 (line) and T2 (neutral).
Both outputs are protected by fuses inside the corresponding control unit.
Make sure to respect the polarity.
Low voltage connections (12-pole connector)
An operation request contact, the Opentherm connection (communication protocol for cascade control
unit or control unit 0÷10Vdc) and the connection for the optional external sensor are provided for both
generators.
