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KOMFORT EC U(E) 330-(2)
The unit is rated for connection to single-phase alternating current
power mains 230 V / 50 Hz.
The unit is connected to power supply via a pre-wired power cable with
a plug. In case of need to connect a longer cable follow the wiring diagram
below. The electric connections must be performed with insulated, durable
and heat-resistant conductors (cables, wires) with a matching cross section.
While selecting the conductors with respective cross section consider
the wire type, the maximum permissible conductor heating temperature, its
insulation, length and layout.
Use copper wires only! The unit must be grounded!
The fixed electrical wiring must be equipped with an automatic switch
that is used for connection of the unit to power mains with a gap on all poles
at least 3 mm. The automatic switch trip current must be not below the rated
current consumption.
The unit has extra electric connection options. Designation of the
contacts on the sticker of the X3 terminal block are enclosed in brackets, fig. 7:
− automatic fire suppression system contact (PK);
− humidity sensor or CO2 sensor contact (H);
− air damper “3-point control” contact (“Y-N, Y-L, Y-C”).
While connecting the automatic fire suppression system remove the
jumper between the X3:1 and X3:2 terminals of the X3 terminal block. In case
of fire a normally closed dry contact breaks the control circuit and cuts off
power supply to the unit.
The humidity sensor or CO2 sensor is connected to the X3:3, X3:4
terminals of the X3 terminal block. If the sensor is activated, the normally
opened dry contact is closed and the unit switches to maximum speed.
The air damper actuator is connected to the X3:5, X3:6, X3:7 terminals of
the X3 terminal block. One more air damper may be connected to the same
terminals.
Connect extra contacts according to the electric wiring diagram, fig. 7. Route
the wires through the electric lead-in in the upper part of the air handling
unit.
Fig. 7. External wiring diagram
Cut power supply to the unit off by turning the automatic electric switch
QF to OFF position prior to any operations.
Take steps to prevent activation of the automatic switch.
QF
CONNECTION TO POWER MAINS
WARNING
Read the operation manual prior to any electric installations. Connection of the unit to power mains is allowed by a
qualified electrician only.
The rated electrical parameter are stated on the rating plate. No modifications of internal connections are allowed and will
result in void warranty.
Connect the unit only to power mains with valid electric standards.
Follow the respective electric standards, safety rules (DIN VDE 0100), TAB der EVUs. The house cabling system must be
equipped with an automatic switch at the external input. Connect the unit to power mains through the automatic switch. The
contact gap on all poles at least 3 mm (VDE 0700 T1 7.12.2 / EN 60335-1).
The automatic switch trip current must be not below the rated current consumption, refer Table 1. Install the automatic
switch to ensure prompt access.
1
2
3
4
"2"
L
L
ÐÊ
Í
Y-L
Y-C
While connecting the normally closed
(NC) contact to the fire suppression
system remove the jumper
РК
to the fire alarm
panel
РК
H
“1”
“2”
“3”
Y-C
C
L
N
Y-L
X3
1
2
3
4
5
7
6
Y-N
Н
to the humidity
sensor or CO2
sensor
Air damper
actuator
Y
to the air damper
KOMFORT EC UE330 v2(3)_EN.indd 8
10.08.2015 11:27:50
