i-HWAK V4
Chillers and inverter air / water heat pumps with axial fans
17
WARNING: The electrical panel is located under the coping plate. It is necessary to respect the minimum clearances
given in section 7.3 in order to be able to connect the wires.
WARNING: Installer has to provide a general circuit breaker (for example a magnetothermic circuit breaker) at the
beginning of unit circuit system.
WARNING: The supply voltage’s fluctuations cannot exceed ±10% of the nominal value. Should this tolerance not be
respected, please contact our technical department.
WARNING: The power supply have to respect the listed limits: failing this, warranty will terminate immediately.
Before any operation on the unit, be sure that the power supply is disconnected.
WARNING: The water flow switch (B component in the previous hydraulic circuit and factory installed) have ALWAYS
to be connected following the indications listed in the wiring diagram. Never bridge the water flow switch
connections in the terminal board. Should the water flow switch connections altered or not properly made, the
guarantee will be invalidated.
WARNING: The remote control panel is connected to the water chiller by means of no.4 wires having a 1,5 mm
2
section. The power supply cables have to be separated from the remote control wires. The maximum distance is 50m.
WARNING: The remote control panel cannot be installed in areas with strong vibrations, corrosive gases, and excess
of dirtiness or high humidity levels. Leave free the area near the cooling openings.
7.8.1
Wiring terminal block
Electrical wiring have to be done only by qualified personnel.
The electrical connections have to be realized by qualified personnel.
The terminal block is located under the cover of the unit
close to the side where the controller is positioned. To get access to the terminal block, please see the indications reported in the
paragraph 7.8.2. The wiring to the terminal block has to be realized in accordance to the below notes (the drawing is for
illustration).
The illustrations below are for the corresponding sizes 14T and 16T, as for the other models, the only difference is concerning the
power supply input terminals.
The connections indicated below are standard. Other connections are shown in the manual MCO of the on board control of the
minichiller i-HWAK V4 (see "TABLE OF CONFIGURATIONS ALLOWED TO USER AND INSTALLER"), depending on the configurations
adopted.
Terminal
Connection
Type
PE
Connect to the grounding wire of the power supply
Power supply input 1-Ph/N/PE,230V, 50Hz
(only for the sizes 06/08/10/12 and 14M)
N
Connect to the neutral wire of the power supply
L
Connect to the phase wire of the power supply
PE
Connect to the grounding wire of the power supply
Power supply input for 3-Ph/N/PE, 400 Vac,
50Hz.
(only for the sizes 14T and 16)
N
Connect to the neutral wire of the power supply
L1
Connect this therminal to L1 of the three-power supply
L2
Connect this therminal to L2 of the three-power supply
L3
Connect this therminal to L3 of the three-power supply
NC1
Normally closed terminal
(230Vac).
Changeover contact
, 1- phase power supply
230Vac, 50Hz, 5A resistives, 1A inductives
N
Terminal for neutral wire (230Vac).
NO1
Normally open terminal (230Vac).
NC2
Normally closed terminal (230Vac).
Changeover contact
, 1- phase power supply
230Vac, 50Hz, 5A resistives, 1A inductives
N2
Terminal for neutral wire (230Vac)
NO2
Normally open terminal (230Vac).
R+
Modbus signal connection
+
for remote keyboard
Modbus communication
R-
Modbus signal connection
-
for remote keyboard
GNDR
Modbus ground reference terminal connection for remote keyboard
12V+
Remote keyboard power supply (12V, 50Hz, 500mA)
Output for 12Vac, 50Hz power supply
