Electrical Connections - Hitecsa EQU-PF 233 Manual De Instalación, Uso Y Mantenimiento

II.5

ELECTRICAL CONNECTIONS

IMPORTANT!
Always install a general circuit breaker in a
protected area near the device with a delayed
characteristic curve, adequate capacity and
breaking power. There should be a minimum
distance of 3 mm between the contacts. The earth
connection is mandatory by law and protects the
user while the machine is in use
IMPORTANT!
Refer to the wiring diagrams attached to the unit, in
which the terminals to be set up by the installer are
highlighted.
DANGER!
The electrical connection of the unit must be
carried out by qualified personnel in compliance
with the regulations in force in the country where
the unit is installed. Shall not be held liable for
damage to persons or property caused by a non-
compliant electrical connection. 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.
 All the connections carried out during installation must be secured
against accidental loosening. It is particularly important for the earth
wire to be longer than the others so that it is the last to stretch if
detached.
 The electrical connection wires must pass through ducts having a
minimum protective rating of IP33 (in accordance with EN 60529).
 Pay particular attention for the presence of sharp edges, burrs,
rough surfaces in general or threads in order to make sure the wire
insulation is not damaged.
 Cable ducts must be anchored securely to the floor or walls.
 If people walk through the area where the cable is installed, it must
be set at least 2 metres above the work area.
 H07RN-F-type cables or in any case a cable with "no vertical flame
propagation on a single cable" must be used, in accordance with test
IEC 20-35/1-1 (EN 50265-2-1), provided in standards IEC 20-19,
CENELEC HD22 with a minimum cross-section according to that
stipulated in the wiring diagrams attached to the unit.
 It is mandatory for the unit to be earthed. It must be set-up during
installation using the specific clamp with the earthing mark.
 The power supply cables must pass through external cable glands
underneath the electrical panel.
IMPORTANT!
Before connecting the main power supply cables
L1-L2-L3 to the terminals of the general circuit
breaker, make sure that they are in the right order.
Model Line
245 mm² 10
2130 mm² 35
PE Commands and
controls
10 1,5
16 1,5
SECTION II: INSTALLATION AND MAINTENANCE
II.5.1.1 Remote management through connections
set up by the installer
The connections between board and switch or remote light must be
carried out with the screened cable consisting of 2 twisted 1.5 mm²
wires and the screen. The screening must be connected to the earth
screw on the panel (on one side only). The maximum permitted
distance is 30 m.
CS Shifting Set-point (4÷20 mA signal);
SDS Double Set-point selector (control with potential free
contact);
SCR Remote control selector (control with potential-free
contact);
SEI Remote summer/winter selector
(control with potential free contact);
LBG General lockout light (230 Vac);
LFC1 Compressor 1 work light (230 Vac);
LFC2 Compressor 2 work light (230 Vac);

Remote ON/OFF enabling (SCR).
IMPORTANT!
When the unit is switched OFF using the remote
control selector, the message OFF by digital input
appears on the control panel display on the
machine.
Remove the terminal bridge on the board in the electrical panel and
connect the wires coming from the remote control ON/OFF selector
(selector to be installed by the installer).
ATTENTION

Remote summer/winter enabling on EQUH-PF Connect the
wires coming from the remote summer/winter selector on to the
terminals in the electric panel.
Then modify the Rem. Summer/Winter parameter
ATTENTION

LBG – LCF1 – LCF2 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.
II.5.1.2 Remote control with the control panel
installed on the machine or with a second
keyboard (KTR: remote keyboard)
The remote keyboard (KTR) allows all the unit's digital and analogue
process variables to be remote controlled and displayed. This
accessory precisely reproduces the functions of the keyboard and the
microprocessor electronic controller installed on the machine. It is
therefore possible to control all the unit functions directly in the room.
The control panel installed on the machine can be remote controlled
after having removed it from the unit, making sure not to damage it.
Close the hole on the door of the electrical panel so that humidity
does not infiltrate.
If you wish to remote control a second keyboard (KTR), remove the
telephone cable connector from its seat in the unit control panel and
insert the remote control connector.
ATTENTION!
Make sure the electrical supply has been
disconnected from the system before starting any
operation.
Follow these guidelines to connect the Area Terminal:

use a 6-wire telephone cable and RJ12-type connectors;

head the cable according to the figures below;

the length of the cable must not exceed 50 m (*);

keep the telephone cable separate from the inductive and power
loads inside the unit;

use the cable ducts intended for the signal cables inside the
electrical panel;

never insert the telephone and power cables in the same cable
ducts when connecting the Area Terminal and the chiller/heat
pump board.
13
Open contact: the unit is OFF.
Closed contact: the unit is ON.
Open contact: heating cycle
Closed contact: cooling cycle