Unical HP OWER 60, User'S And Installer'S Manual

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HP_OWER
11
5.7 ELECTRICAL CONNECTIONS
Check out that the power supply meets the unit’s electric nominal data (tension, phases, frequency) reported on the label in the
unit’s right-side panel. Power connections have to be made in accordance to the wiring diagram enclosed with the unit and in
conformity with the national and international norms in force (providing equipment as general magnetothermic circuit breaker,
differential circuit breakers for each electric line, proper grounding for the plant, etc.). Power cables, electric protections and line
fuses have to be sized according to the specifications listed in the wiring diagram enclosed with the unit and in the electrical data
contained in the table of technical characteristics.
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.
5.7.1 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 plastic cover on the
side of the hydraulic connections (for the models 120 and 150, it is necessary to remove the protective carter). The wiring to the
terminal block has to be realized in accordance to the below notes (the drawing is for illustration).
The connections indicated below are standard. Other connections are shown in the manual of the on board control
Terminal
Type Connection
GND Power supply
1-Ph/N/PE
230V, 50Hz
(3-Ph/N/PE
400 Vac, 50Hz for the model of 15kW)
Connect the grounding wire
N1 Power supply
1-Ph/N/PE
230V, 50Hz
(3-Ph/N/PE
400 Vac, 50Hz for the model of 15kW)
Connect the power supply neutral wire;
L1 Power supply
1-Ph/N/PE
230V, 50Hz
(3-Ph/N/PE
400 Vac, 50Hz for the model of 15kW)
Connect the power supply phase wire; (note that, in the three-phases
versions there are two other terminals, L2 and L3)
NC1
Digital output
230 Vac with changeover contact Power supply NC terminal (230V AC) for 3-way valve for sanitary hot water
boiler (used only for 3-way valve with 3 contacts for power supply