Euroclima ZHK NANO, Инструкция по эксплуатации, Страница: 12 / 19

instruction and operation manual ZHK NANO
V04-18 43 / 116
7 Electrical connection
- The electrical connection must be executed in compliance with international regulations such
as the Low Voltage Directive and the requirements of electromagnetic compatibility of national
legislation and the requirements of the local electricity provider.
- All electrical connections must be inspected annually and deficiencies (for example, loose ca-
ble strands, loose screw and clamp connection,...) must be eliminated immediately.
7.1 Connecting to an external protective conductor system
The AHU must be connected to an external protective conductor system. The AHU shall be either:
- connected at the base frames or
-
alternatively, at the potential compensation, that is mounted on the flexible connection by EU-
ROCLIMA.
Furthermore, each electrical component must be connected to the protective conductor system.
The connection to the external protective earth system has to be executed according to EN 60204-
1, pt. 5.2. The minimum cross-sectional-surface of the earth at frequency converter has to be
10 mm², otherwise 4 mm² at units with control. Depending on the cross-sectional-surface of the
outer conductor, the requirements regarding minimum cross-sectional-surfaces of the protective
earth system according to EN 60204-1, pt. 5.2, table 1 have to be considered additionally.
After assembling and installation the consistency of the protective conductor system has to be
checked and documented according to EN 60201-1, pt. 18.2.
Correct direction of motor rotation is a result of direction of fan impeller rotation which is signed by
an arrow: for EC fan refer to
Figure 82 .
Before connecting the motor check the rotating field of mains connection with a suitable device. Af-
terwards, connect the phases accordingly to repair switch.
Figure 82: Rotation marking of EC
fans
Fastening torque for electrical connections on the control panel refer to
Table 4 :
Thread
Ø
M4 M5 M6
Nm
min. 0,8 1,8 2,7
max. 1,2 2,5 4
Table 4: Torques for the motor terminal board