Table of Contents
Advertisement
Figure 115: Rotation marking of
Fastening torque for electrical connections on the control panel refer to Table 4:
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.
7.3 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 7.7
(Lighting)).
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.
plug fans
Thread
Nm
Table 4: Torques for the motor terminal board
Figure 116: Rotation marking of
housing fans
M4 M5 M6
Ø
min.
0,8 1,8 2,7
max. 1,2 2,5
4
Advertisement
Table of Contents
