The default NS chillers are completely wired and only need the connection to the power supply net, downstream to a group switch, according to the to the regulations in force in the country where the machine is installed.
It is also suggested to check:
− the mains supply characteristics, to ensure it is suitable for the levels indicated in the electrical data table, also taking into consideration any other equipment that may be operating at the same time.
− The unit is only powered after the last (hydraulic and electric) installa- tions.
− Follow the connections instruc- tions of the phase conductors, and earth.
− The power line will have a special protection upstream against short circuits and earth losses that sec- tions the system according to other users.
− The voltage should be within a tolerance of ± 10% of the rated supply voltage of the machine (for three-phase units displacement max 3% between the phases). If these parameters are not respect- ed, contact the energy supplier.
For electrical wirings use isolated double cables according to the standards in force in the different countries.
− It is necessary to use a omnipolar thermomagnetic switch, in compli- ance with the CEI-EN standards (contact opening of at least 3 mm), with adequate switch capa- bility and differential protection based on the followed electrical data table, installed as close as possible to the machine.
− It is necessary to carry out an effi- cient earth connection. The manu- facturer can not be held responsi- ble for any damage caused by the failure and ineffective earthing of the machine.
− For units with three-phase power check the correct connection of the phases.
WARNING:
It is forbidden to use water pipes for the earthing of the machine.
21.1. RECOMMENDED SECTION OF ELECTRIC CABLES
The cable sections indicated in the ta- ble are advised for a maximum length of 50 m.
For higher lengths or different types of cable installation, it will be the DESIGNERS responsibility to carefully measure the line main switch, the supply power line and the earthing protection connection, and the work- ing connection cables:
− the length
− the type of cable
− Absorption of the unit and its physi- cal position, and room tempera- ture.
WARNING:
Check that all power cables are cor- rectly secured to the terminals when switched on for the fi rst time and after 30 days of use. Afterwards, check the connection of the power cables every six months.
Slack terminals could cause the ca- bles and components to overheat.
21.2. CONNECTION TO THE POWER SUPPLY
− Check there is no voltage on the elec- tric line you want to use.
21.2.1. To access the electric box:
−Turn ¼ the screws of the electrical panel in counter-clockwise direc- tion
− Turn the handle of the door-block disconnecting switch to OFF (see figure). In this way, the electrical panel can be accessed
21.3. ELECTRICAL POWER CONNECTION For functional connection of the
electrical panel inside the unit in the previous page and connect it to the disconnecting switch terminals observ- ing the phase, and the earth.
NOTE
Models from 5002 to 7203 A / E have two electrical boxes, a front side com- pressor unit and a heat exchanger finned coil. At the site, we connect the supply power and earth connection.
(fig.. Also in the models from 5702 to 7203 A - E, that are sent separately, at the moment of installation, it is neces- sary to put the two units in network by connecting the two PC03 MASTER SLAVE 1 on the electrical box of the double module with that of SLAVE 2 in the electrical box of the single module (see figure) using exclusively
a shielded AWG20/22 cable made of a twisted pair and a shielding for com- munication standard RS485. The cards are connected in parallel referring to terminal clamp J11. Respect the network polarity: RX/TX+ of one card must be connected to RX/TX+ of the other card and the same thing for the RX/TX-.
All electrical operations must be carried out BY QUALIFIED PERSONNEL, IN ACCORDANCE WITH THE CORRESPONDING REGULATIONS, trained and in- formed about the risks related to such operations.
The characteristics of electric lines and related components must be estab- lished by PERSONNEL AUTHORISED TO DESIGN ELECTRIC INSTALLATIONS, fol- lowing international regulations and the national regulations of the country in which the unit is installed, in compliance with the legislative regulations in force at the moment of installation.
For installation requirements, the wiring layout supplied with the unit must be compulsory referred to. The wiring layout together with the manuals must be kept in good conditions and readily ACCESSIBLE FOR FUTURE OP- ERATIONS ON THE UNIT.
It is compulsory to check the machine sealing before connecting the elec- trical wiring. The machine should only be powered once the hydraulic and electric operations are completed.
21.4. AUXILIARY CONNECTIONS AT THE USER/INSTALLER EXPENSE For installation requirements, refer to the wiring diagram supplied with the unit. The wiring diagram together with the manuals must be kept in good conditions and readily ACCESSIBLE FOR FUTURE OPERATIONS ON THE UNIT.
Legenda fig. 2 L1 Linea 1 L2 Linea 2 L3 Linea 3 PE Terra Fig. 2
21.5. ELECTRIC DATA VERSIONS «°/L»
KEY
SECT.A Power supply SECT.B Remote panel EARTH Earth to bring to the
machine THE Main switch Example of electrical connection
NS 2101 A/E no. 3 phase
no. 2 cables for phase 150 mm2 sez. single cable n° 6 total cables
no. cables for phase FASE FASE FASE
NS VERSION no.
power required Formed by: SECT. A SEC. B
mm2 Earth mm2 IL A no. cable
for phase sect. single
cable mm2 total
no. cables no. phase
1251 (°) - L 1 1 150 3 3 1.5 70 250
1401 (°) - L 1 1 185 3 3 1.5 95 315
1601 (°) - L 1 1 240 3 3 1.5 120 315
1801 (°) - L 1 1 240 3 3 1.5 120 400
2101 (°) - L 1 2 150 6 3 1.5 150 630
2401 (°) - L 1 2 185 6 3 1.5 185 630
1402 (°) - L 1 1 185 3 3 1.5 95 315
1602 (°) - L 1 1 240 3 3 1.5 120 315
1802 (°) - L 1 1 240 3 3 1.5 120 400
2002 (°) - L 1 2 150 6 3 1.5 150 400
2202 (°) - L 1 2 150 6 3 1.5 150 400
2352 (°) - L 1 2 185 6 3 1.5 185 630
2502 (°) - L 1 2 185 6 3 1.5 185 630
2652 (°) - L 1 2 185 6 3 1.5 185 630
2802 (°) - L 1 2 240 6 3 1.5 240 630
3002 (°) - L 1 3 150 9 3 1.5 2x120 630
3202 (°) - L 1 3 185 9 3 1.5 2x150 630
3402 (°) - L 1 3 185 9 3 1.5 2x150 800
3602 (°) - L 1 3 240 9 3 1.5 2x185 800
3902 (°) - L 1 3 240 9 3 1.5 2x185 800
4202 (°) - L 1 4 185 12 3 1.5 2x185 800
4502 (°) - L 1 4 240 12 3 1.5 2x240 1000
4802 (°) - L 1 4 240 12 3 1.5 2x300 1000
5002 (°) - L 1 4 240 12 3 1.5 2x240 1000
5202 (°) - L 1 5 240 15 3 1.5 3x240 1205
5402 (°) - L 1 6 240 18 3 1.5 3x240 1250
5702 (°) - L 1 7 240 21 3 1.5 4x240 1600
6003 (°) - L 2 3602 3 240 9 3 1.5 2x185 800
2401 2 185 6 3 1.5 185 630
6303 (°) - L 2 3902 3 240 9 3 1.5 2x185 800
2401 2 185 6 3 1.5 185 630
6603 (°) - L 2 4202 4 185 12 3 1.5 3x185 800
2401 2 185 6 3 1.5 185 630
6903 (°) - L 2 4502 4 240 12 3 1.5 240 1000
2401 2 185 6 3 1.5 185 630
7203 (°) - L 2 4802 4 240 12 3 1.5 2x240 1000
2401 2 185 6 3 1.5 185 630
KEY
SECT.A Power supply SECT.B Remote panel EARTH Earth to bring to the
machine THE Main switch 21.6. ELECTRIC DATA VERSIONS «A/E»
Example of electrical connection NS 2101 A/E
no. 3 phase
no. 2 cables for phase 150 mm2 sez. single cable n° 6 total cables
no. cables for phase FASE FASE FASE
NS VERSION no.
power required Formed by: SECT. A SEC. B
mm2 Earth mm2 IL A no. cable
for phase sect. single
cable mm2 total
no. cables no.
phase
1251 A/E 1 1 150 3 3 1.5 70 250
1401 A/E 1 1 185 3 3 1.5 95 315
1601 A/E 1 1 240 3 3 1.5 120 315
1801 A/E 1 1 240 3 3 1.5 120 400
2101 A/E 1 2 150 6 3 1.5 150 630
2401 A/E 1 2 185 6 3 1.5 185 630
1402 A/E 1 1 185 3 3 1.5 95 315
1602 A/E 1 1 240 3 3 1.5 120 315
1802 A/E 1 1 240 3 3 1.5 120 400
2002 A/E 1 2 150 6 3 1.5 150 400
2202 A/E 1 2 150 6 3 1.5 150 400
2352 A/E 1 2 185 6 3 1.5 185 630
2502 A/E 1 2 185 6 3 1.5 185 630
2652 A/E 1 2 185 6 3 1.5 185 630
2802 A/E 1 2 240 6 3 1.5 240 630
3002 A/E 1 3 150 9 3 1.5 2x120 630
3202 A/E 1 3 185 9 3 1.5 2x150 630
3402 A/E 1 3 185 9 3 1.5 2x150 800
3602 A/E 1 3 240 9 3 1.5 2x185 800
3902 A/E 1 3 240 9 3 1.5 2x185 800
4202 A/E 1 4 185 12 3 1.5 2x185 800
4502 A/E 1 4 240 12 3 1.5 2x240 1000
4802 A/E 1 4 240 12 3 1.5 2x300 1000
5002 A/E 1 4 240 12 3 1.5 2x240 1000
5202 A/E 1 5 240 15 3 1.5 3x240 1205
5402 A/E 1 6 240 18 3 1.5 3x240 1250
5702 A/E 1 7 240 21 3 1.5 4x240 1600
6003 A/E 2 3602 3 240 9 3 1.5 2x185 800
2401 2 185 6 3 1.5 185 630
6303 A/E 2 3902 3 240 9 3 1.5 2x185 800
2401 2 185 6 3 1.5 185 630
6603 A/E 2 4202 4 185 12 3 1.5 3x185 800
2401 2 185 6 3 1.5 185 630
6903 A/E 2 4502 4 240 12 3 1.5 240 1000
2401 2 185 6 3 1.5 185 630
7203 A/E 2 4802 4 240 12 3 1.5 2x240 1000
2401 2 185 6 3 1.5 185 630