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9
KOMFORT LE
The KOMFORT LE350-3 ... LE600-4 unit is rated for connection to single-
phase alternating current power mains 230 V / 50 Hz. The KOMFORT LE800-9
... LE2200-18 is rated for connection to three-phase alternating current
power mains 400 V / 50 Hz.
The electric connections must be performed with insulated, durable and
heat-resistant conductors (cables, wires) with a matching cross section, see
table 5.
The referred conductor cross section is for reference only. 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 in compliance with
the valid electrical standards of the user country!
Connect the unit to power mains through the terminal block following
the wiring diagram and the terminal designation, fig. 8. The KOMFORT
LE350-3 ... LE600-4 terminal block is located in the terminal box and the
KOMFORT LE800-9 ... LE2200-18 terminal block is located in the control unit.
Connect all the control and power cables in compliance with the
terminal marking and polarity.
The rating plate with a terminal designation is placed inside of the
terminal box.
The terminal clamp marking corresponds to the marking on the wiring
diagram.
Route the cables to the terminal box through the cable lead-in on the
unit side panel to preserve the electrical protection class.
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, refer table 1 and table 5.
Table 5. Unit connection
Model
Automatic switch rated current [A]
Copper wire cable
KOMFORT LE350-3
20 (single-phase)
3 x 2, 5 mm
2
KOMFORT LE500-3
KOMFORT LE530-4
KOMFORT LE600-4
KOMFORT LE800-9
20 (three-phase)
5 x 2, 5 mm
2
KOMFORT LE1200-9
KOMFORT LE1700-18
40 (three-phase)
5 x 4 mm
2
KOMFORT LE2200-18
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 before finishing all the operations.
QF
L
N
X1
1
2
3
N
L
QF
PE
~230 V
50 Hz
Unit
PE
5
4
N
N
L2
L1
QF
PE
~400 V
50 Hz
L2
L1
X1
2
1
3
L3
L3
Unit
PE
Single-phase power mains
KOMFORT LE350-3 / KOMFORT LE500-3
KOMFORT LE530-4 / KOMFORT LE600-4
Three-phase power mains
KOMFORT LE800-9 / KOMFORT LE1200-9
KOMFORT LE1700-18 / KOMFORT LE2200-18
Fig. 8. Electric wiring diagram
KOMFORT_LE_v2(2)_EN.indd 9
10.08.2015 12:00:45
