31
Ultra
1.54
Comfortable indoor climate in high-end interiors
Installation and operating instructions
Voltage supply and fuse
The fan and KaControl module are together supplied by a supply line
with 230 V/50Hz voltage. An operating indicator LED is positioned on the
connecting PCB in the KaControl module. A unit fuse Ø5x20 mm is also
installed as a main fuse on each connecting PCB as well as on the secondary
side for 24 V voltage, and a TR5 fuse on the power PCB and a unit fuse
Ø 5x20 mm on the Katherm Board. Refer to Table 7 for values. Maximum
on-site fuse 10 A.
10.3.3 EC single-phase motor
Take into account special conditions for use in IT systems.
Please refer to the operating instructions for the respective EC fan for this
information.
All EC fans have integral overload protection; no upstream motor protection
device is therefore needed.
When using RCCBs for motors with EC technology, ensure that
they are sensitive to pulse current and/or all current (type A or B).
It is impossible to protect personnel when operating the unit with residual-
current protection devices, as well as with frequency converters. When
power is applied to the unit, pulse-like capacitor load currents in the
integrated EMC filter can lead to the RCCB being immediately tripped.
We would recommend a trip current of 300 mA and delayed tripped (super-
resistant, characteristic K) for maximum possible operating safety. First
close the „PE“ protective conductor on the junction box or the KaControl
recirculation air module. When disconnecting, be sure to disconnect the
earth conductor connection last. Wire the unit in accordance with the
applicable wiring diagram.
One mains voltage has been applied, allow an initialisation period of approx.
10 seconds until the EC fan‘s electronics are ready for operation. A reliable
status message is then possible. If no fault is detected, the relay (depending
on model size) is energised after the initialisation period.
To ensure that the switch-on current limit is active, wait a minimum of
30 seconds before switching on again after the mains voltage has been
switched off.
Connecting PCB
Power PCB
Katherm Board
Main fuse
24 V voltage
T 2.5 A
T 315 mA
F 2.5 A
T 5.0 A
Table 7
