Unical MODULEX EXT 100, Installation And Servicing Instructions

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Instructions for the installer
3.19 - ELECTRICAL CONNECTIONS
Regulations in force
The gas and water feeding pipes 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 elec
-
trical system is adequate to the appliance’s maximum absorbed
Terminal block E8 (back)
Terminal block BCM (back)
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 observan-
ce 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 permit children or inexpert people to use the
appliance.
Mains electrical supply connection 230V
The electric connections of the boiler are shown in the section
named “WIRING DIAGRAMS”
A mains supply of 230 V – 50 Hz is required. The wiring to the
boiler must be in accordance with the current CEI regulations.
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
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 accidentally turned on.
fitted on the gas supply cir
-
cuit, but not to the boiler so
as to guarantee the running
of the pump and permit the
boiler to cool down.
WARNING!
W e r e m i n d y o u t h a t
upstream of the electri-
cal connection, it will be
necessary to foresee a
service relay (NOT SUP
-
pLIED) which, when the electrical
safety devices (ISPESL) intervene,
shuts down the electrical supply to the
on-off fuel valve fitted on the gas supp
-
ly circuit, but not to the boiler so as to
guarantee the running of the pump and
permit the boiler to cool down.
It is necessary to fit a double pole switch
on the electrical supply line, having a 3
WARNING!
230 V cables shall be separated from 24 V ones,
using the two plastic conduits supplied within the
boiler casing L.H. side panel.
mm contact separation in both poles, in an easy
accessible position in order to make quick and safe
the servicing operations.
FL = FLOW CONNECTION
A