Instruction manual

31
Instructions for the installer
Mains electrical supply connection 230V
The electric connections of the boiler are shown in the section
named “ACTUAL WIRING DIAGRAM” (paragraph 3.19 page
31)
The boiler installation requires a mains supply of 230 V - 50
Hz. The wiring to the boiler must conform to current CEI regu-
lations.
The supply cable must have the following characteristics: PVC
HT CABLE H05V2V2-F 3x0,75
DANGER!
The electrical connections must be carried out
only by a qualified engineer.
Before carrying out the connections or any
other operation on the electrical parts, always
switch off and disconnect the electricity supply
and ensure yourself that it cannot be acciden-
tally turned on.
It is necessary to fit a double pole switch on the
electrical supply line, having a 3 mm contact
separation in both poles, in an easy accessible
position in order to make quick and safe the ser-
vicing operations.
The supply cable must be replaced only by
highly qualified personnel. Failure to do so
could compromise the appliance's safety.
WARNING!
We remind you that upstream of the electrical
connection, it will be necessary to foresee a
service relay (NOT SUPPLIED) which, when
the electrical safety devices (ISPESL) interve-
ne, shuts down the electrical supply to the on-
off fuel valve fitted on the gas supply circuit,
but not to the boiler so as to guarantee the
running of the pump and permit the boiler to
cool down.
- Gain access to the Y1 terminal board
- Room thermostat: connect the thermostat's cables to the
terminals 1 and 2.
DANGER!
Switch off and disconnect the electricity sup-
ply before carrying out any operations on the
electrical parts.
Room
Thermostat
Room thermostat connection
3.18 - ELECTRICAL CONNECTIONS
General warnings
The elctrical safety of the appliance is assured only when it is
correctly earthed, according to the electrical rules in force.
The gas, D.H.W. and the CH system pipes cannot be used as
ground plates.
Ensure that the above safety electrical requirements subsist;
in case of doubt, ask for a professionally qualified technician
to check the appliance’s electrical system.
UNICAL refuses responsibility for any damages arising from
failure to earth the boiler correctly.
It is necessary that a qualified technician verifies that the
electrical system is adequate to the appliance’s maximum
absorbed power, indicated on the data plate, verifying in
particular that the section of the system’s cables is suitable
to the appliance’s maximum absorbed power.
For the appliance’s general electrical supply the use of
adaptors, multiple sockets and/or extension cords is strictly
forbidden.
The use of any power supplied equipment implies the
observance of several fundamental rules, such as:
- Do not touch the appliance with any wet part of your body
and/or barefooted;
- Do not pull the supply cables
- Do not expose the boiler to sunlight, rain, etc., unless it is
explicitly foreseen;
- Do not permit children or inexpert people to use the
appliance.