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2.5 Electrical Connections
Connection to the electrical grid
The boiler must be connected to a single-phase, 230 Volt-50 Hz electric line.
The unit's 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 is not responsible for any damage caused by failure to
earth the system.
The boiler is prewired and provided with a Y-cable and plug for connection to the electricity line. The connections
to the grid must be made with a permanent connection and equipped with a bipolar switch whose contacts have a
minimum opening of at least 3 mm, interposing fuses of max. 3A between the boiler and the line. It is important to
respect the polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green wire) in making connections
to the electrical line. During installation or when changing the power cable, the earth wire must be left 2 cm longer
than the others.
The user must never change the unit's power cable. If the cable gets damaged, switch off the unit and have it
changed solely by professionally qualified personnel. When changing the cable use solely "HAR H05 VV-F"
3x0.75 mm2 cable with a maximum outside diameter of 8 mm.
Room thermostat
CAUTION: THE ROOM THERMOSTAT MUST HAVE CLEAN CONTACTS. CONNECTING 230 V. TO THE TER-
MINALS OF THE ROOM THERMOSTAT WILL IRREPARABLY DAMAGE THE ELECTRONIC CARD.
When connecting a remote timer control or a timer switch, do not take the power supply for these devices
from their cut-out contacts. Their power supply must be taken with a direct connection from the mains or with
batteries, depending on the kind of device.
Access to the electrical terminal board
The terminal block is at the bottom of the boiler (see fig. 2)
Or
2.6 Fume ducts
The unit is "type C" with an airtight chamber and forced draught, the air inlet and fume outlet must be connected
to one of the following extraction/suction systems. Before commencing installation, it is first necessary to check that
the fume ducts do not exceed the maximum permissible lengths.
This C-type unit must be installed using the fume extraction and outlet ducts supplied by the manufacturer
in accordance with UNI-CIG 7129/92. Failure to use them automatically forfeits all warranty and liability of
the manufacturer.
26
Room
thermostat
Remote
timer control
(Opentherm)
Cod. 3540D961 - 06/2007 (Rev. 00)
CIPREA 20 S
Fig. 2
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