Bedienungsanleitung Unical MODULEX EXT 250 (Seite 29 von 56) (Englisch)

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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qualied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qualiedtechnicianveries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

qualied 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.

tted 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!

We remind you that

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 tted 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t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

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Unical MODULEX EXT 250 Seite 29

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