Bedienungsanleitung Unical EVE 05 CTN 24 F (Seite 26 von 36) (Englisch)

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Installation info

2.2.14 - ELECTICAL CONNECTIONS

The electrical connections of EVE 05 are

shown in the clause ‘’WIRING DIAGRAMS’’

(par. 2.3 - pag. 29)

The boiler must be connected to

the mains supply at

230 V - 50 Hz. This connection is

to be perfectly done, as foreseen

by the IEC and local rules and must be

earthed.

This fundamental requirement for safety pur-

poses must be checked; in case of doubt,

ask for a professionally qualified technician

to check the electrical system.

UNICAL disclaims all liability for damage or

injury caused by failure to earth the system

properly.

Gas, domestic water and central heating

pipes are not suitable for earthing purpo-

ses.

The boiler is supplied with 1.5 m long

3 x 0.75 mm² cord.

A double pole switch with a distance between

the contacts higher than 3 mm, must be ins-

talled upstream the boiler to enable all main-

tenance operations to be carried out safely.

Access to the electrical terminal strip

- WARNING! Switch off the electrical sup-

ply

- Remove the securing screws B in order

to rotate the control panel

- Remove the casing.

- To get access directly to the connections,

unscrew the 4 screws on the panel cover

(CP) and remove the cover.

Replacement of the electrical supply

cord

The replacement of the electrical supply

cord has to be done by competent technical

personnel.

Should the electrical supply cord be repla-

ced, you have to use the original cable code

95600259.

fig. 24

- Open the rear cover (CP) and replace

the cable A (connector A7)

The female faston of the hearting cable

has to be connected on the male faston

GND 1

Connection of the ON/OFF room

thermostat (RT)

- Approach the connector M1.

- Remove the existing jumper and connect,

on its place the room thermostat cable.

Collegamento ad un bollitore esterno

It is necessary to make the electrical

connection as indicated.

The diverting valve has to be fitted with the

priority to the DHW circuit and the microwitch,

whose its motor must to be equipped, has to

be closed once the DHW has been satisfied

and the valve is retourned in the normal

position.

The microswitch contacts C. and N.C. have

to be connected to the two pole terminal block

(TA), fitted on the boiler panel board, after

removal of the existing link (bridge - shunt).

The connection of a room thermostat will be

done onto the same terminals, in parallel with

the contacts of the diverting valve.

2.2.15 - JUMPER LOCATION

They are placed on the modulation card and

their purpose is to settle basic operational

functions.

In order to get access to the jumper:

- WARNING! switch off electrical supply.

- Remove the casing.

JP1: For nat. gas boilers, the jumper is on

NAT.

For LPG boilers, the jumper is on LPG.

The boilers operating with natural gas will at-

tempt the ignition for 3 times before to be put

in lock-out.

The boilers operating with LPG will be put in

lock-out after a single ignition attempt.

LPG

JP1

NAT

LPG

NAT

230V / 30-65°C

Boiler

thermostat

3 Way motor 230V with

internal microswitch

Boiler panel board

TA terminal block

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