25
TOP unit heaters
1.53
Unit heaters (2-stage three-phase motor/1-stage AC single-phase motor/continuously variable EC single-phase motor)
Installation and operating instructions
Connecting board
Power
board
Katherm-
Board
Main fuse
24 V voltage
Models 44, 45
and 46
T 2.5 A
T 315 mA
F 2.5 A
T 5.0 A
Model 47
T 5.0 A
T 315 mA
T 5.0 A
T 5.0 A
Table 7
9.3.3 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 for models 44, 45 and 46
(type A) and sensitive to all current for model 47 (type B or
B+). It is impossible to protect personnel when operating the
unit with residual-current protection devices, as well as with
frequency converters. When voltage 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
tripping (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.
Once mains voltage has been applied, allow an initialisation
period of approx. 10 seconds until the EC fan's electronics are
ready for operation. Only then is a reliable status message
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.
Cable protection
Make sure that the fuse for the mains power connection takes
into consideration the cable used, type of cabling, operating
conditions and applicable standards. Maximum on-site fuse
16 A.
Summary of Contents for Lufterhitzer TOP Series
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