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5.2 – Thermal-magnetic disconnect switch
The following thermal-magnetic disconnect switches must be
incorporated in the electric heater control box (curve C). The
current must comply with the capacity (kW) of the electric
heater installed.
The thermal-magnetic disconnect switches are as follows and
match the models and capacities of the electric heaters in tables
3 and 4.
Table 3 – Cooling models
Power
Letter in wiring
supply
diagram
V-ph-Hz
400-3-50
F18 thermal-
magnetic switch (A)
230-1-50
230-3-50
400-3-50
R3 electric heater
total (kW)
230-1-50
230-3-50
Table 4 – Heat pumps
Power
Letter in wiring
supply
diagram
V-ph-Hz
400-3-50
F18 thermal-
magnetic switch (A)
230-1-50
230-3-50
400-3-50
R3 electric heater
total (kW)
230-1-50
230-3-50
These thermal-magnetic switches are located in the control box
of the electric heater, as shown in figures 1 and 13.
Thermal switch
50TA/TZ – 38TA/FZ – 40TA/TY/TZ/BZ
024
036
042-
060
072
048
16
16
16
25
25
25
32
-
-
-
-
25
40
-
50
6
6
6
9
12
9
9
13.5
4
6
-
-
-
-
6
9
-
12
50TY/YZ – 38TY/BZ – 40TY/BZ
024
036
042-
060
048
6
10
10
10
16
16
-
-
-
16
16
16
1.5
3
3
4.5
2
3
-
-
-
3
3
4.5
Fig. 12
F18 installation site
Once installed in the control box, they must be connected to
contactor K8 in accordance with the wiring diagram. Afterwards
084
they must be connected to the main unit control box with the
power supply cables.
32
-
5.3 - Power supply cables
50
18
This manual refers to packaged units. The power supply cables
used for split system vary, units depending on the distance
-
between the indoor and outdoor units (maximum voltage loss
18
5%). The standard cables for the power supply in packaged
units are:
Fig. 14 - 230 V single-phase heaters with 2, 3, 4 and
072-
084
16
-
20
6
-
6
Dimensions, mm
kW
A
2 and 4
3000
3 and 6
3200
Wire section, mm
kW
L1
2 and 3
2.5
4
4
6
6
Colour code:
L1 = Black
N
= Blue
= Green/yellow striped
2
= Flexible pipe, type PG 13.5
Fig. 13
6 kW capacity
N
2.5
2.5
4
4
6
6
5
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