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II.7
ELECTRICAL CONNECTIONS
DANGER!
Always install a general automatic switch in a
protected area near the appliance with a
characteristic delayed curve, sufficient capacity and
breaking power. There should be a minimum
distance of 3 mm between the contacts.
Earth connection is compulsory by law and
safeguards the user while the machine is in use.
DANGER!
Electrical connection of the unit must be carried out
by personnel skilled in the matter and in
compliance with the regulations in effect in the
country where the unit is installed. Non-conforming
electrical connection relieves EMMETI S.p.a. from
all responsibility for damage to persons and
property.
In making the electrical connections to the board,
cables must be routed so that they do not touch the
hot parts of the machine (compressor, flow pipe
and liquid line). Protect the wires from any foam.
IMPORTANT!
For electrical connections to the unit and the
accessories, follow the wiring diagrams which are
supplied with them.
The safety door interlock automatically prevents electric power being
fed to the unit if the cover panel over the electrical panel is opened.
After opening the front panel of the unit, feed the supply cables through
the appropriate cable clamps in the external panelling and then through
the ducts at the base of the electric board.
The electrical power supplied by the single-phase or three-phase line,
must be taken to the main isolator switch.
The supply cable must be of the flexible type, with PVC sheathing of no
lighter than H05RN-F: for the section, refer to the table below or the
wiring diagram.
0510
mm²
0710
mm²
0910
mm²
1110
mm²
1510
mm²
1710
mm²
2210
mm²
2410
mm²
2710
mm²
3010
mm²
The earth conductor must be longer than the other conductors in order
to ensure that in the event of the cable clamping device becoming
slack, it will be the last to come under strain.
2,5
2,5
1,5
2,5
2,5
1,5
2,5
2,5
1,5
4
4
1,5
4
4
1,5
4
4
1,5
6
6
1,5
6
6
1,5
10
10
1,5
10
10
1,5
SECTION II: INSTALLATION AND MAINTENANCE
II.7.1.1
Remote Management Through Connections
Prepared by the Installer
The connections between board and switch or remote light must be
carried out with the screened cable consisting of 2 twisted 0.5 mm²
wires and the screen. The screen must be connected to the earth bar
on the panel (on one side only). The maximum permitted distance is 30
m.
SCR
Remote control selector
(control with clean contact);
SEI
Summer/winter selector
(control with clean contact);
DSP
Double set-point connector
(control with clean contact);
CACS
DHW consent
(control with clean contact);
LBG
General lockout light (230 Vac);
VACS
DHW valve (230 Vac 0,5 A ac1) (accessory);
EKEAP
Outdoor air sensor for Set-point compensation
(incompatible with CS accessory);
• Remote ON/OFF enabling (SCR)
IMPORTANT!
When the unit is switched OFF using the remote
control selector, the letters Scr appear on the
control panel display on the machine.
Remove the ID8 terminal bridge on the electronic board and connect
the wires coming from the remote control ON/OFF selector (selector to
be installed by the installer).
ATTENTION
• Remote summer/winter enabling (SEI) on EH
Connect the wires coming from the remote summer/winter selector onto
the ID7 terminal present on the electronic board.
At this point change parameter SUr from n to y.
ATTENTION
• Double set-point management (DSP)
Connect the cables coming from the double set-point selector on the
dedicated clamps present in the electric control board and indicated in
the wiring diagram attached to the machine (DSP reference).
ATTENTION
• DHW management (CACS) on EH
Connect the wires coming from the remote summer/winter selector on
the ID7 terminal present on the electronic board.
Enter the main menu handling DHW SAn to activate this function (see
user instructions – Electronic controls).
ATTENTION
• LBG Remote Control
To remotely control the two signals, connect the two lamps according to
the instructions provided in the wiring diagram supplied with the
machine.
• Compensation set-point with external probe (EKEAP)
Connect the wires coming from the external probe onto the electric
boards B2.
II.7.1.2 Remote management using accessories
supplied separately
It is possible to remote control the entire machine by linking a second
keyboard to the one built into the machine (EKTR accessory).
The use and installation of the remote control systems are described in
the Instruction Sheets provided with the same.
38
Open contact:
the unit is OFF
Closed contact:
the unit is ON
Open contact:
heating cycle
Closed contact:
cooling cycle
Open
Set-point standard
contact:
Closed
Double Set-point
contact:
Open
Heating
VACS OFF
contact:
installation
Closed
VACS ON
Sanitary heating
contact:
Coo/Hea
dCo/dHE
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