instruction and operation manual ZHK NANO
44 / 116
V04-18
Before connecting to the local power network, must be controlled, that the local
power supply coincides with the motor requirements from the nameplate. In gen-
eral the fan motors are designed for continuous operation. Abnormal operating
conditions, particularly multiple start-ups at short intervals should be avoided,
they may lead to thermal overloading of the motor.
7.2 EC
motors
EC motors are variable through an integrated frequency converter. For operation, the supply volt-
age, a digital enable signal and an analog control signal are required for the speed control.
When using residual current circuit breakers (RCDs), the supply line must be protected by means
of a pulsed current (type A) or an all-current sensitive (type B) residual current circuit breaker.
Cable type for motor connection
A shielded cable must be used for the motor cable (supply voltage) and the analog input signal,
and the shield must be grounded on both ends (repair switch & motor).
7.3 Repair switch (emergency stop switch)
According to the standards IEC / EN 60204 and VDE 0113, all hazardous facilities have to be
equipped with a main switch which separates the plant from all active conductors of the main sup-
ply. This means that every single AHU must be equipped with such a repair switch.
Requirements according to DIN VDE 0660 and IEC 947-3 on a repair switch in RED-YELLOW
execution:
1. Is used as a repair, maintenance or safety switch, because the actuation of the switch does not
reset the control commands from control system.
2. Has
clearly
marked
OFF
(0) and ON (I) position.
3. In OFF position lockable, to secure against unauthorized or unintentional restart.
4. For outdoor installation the repair switch at least must be IP65.
5. Interrupts the power supply to the AHU (lighting can be excluded, refer to
chapter 7.6 (Light-
ing)
).
6. Separates the electrical equipment from the main supply.
7. Is easily accessible
8. Mounted within sight of the AHU.
9. The assignment to the AHU can be clearly seen.
10.
Emergency stop function
: The emergency stop function, which is signaled by the red handle
with yellow background,
has to be implemented by additional components
in control sys-
tem. Reset means that a manual start command
±
separate from repair switch
±
must be acti-
vated.
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