46
CTC EcoZenith i360
L1
L2
L3
1
2
3
4
EL
3A
E
L
2B
E
L
2A
E
L
1B
E
L
1A
On
RESERV
B
A
A
A
A
From electricity
distribution
board
Current sensor
Fuse panel
Power from each step for immersion
heater [kW]
EL1A
EL1B
EL2A
EL2B
EL3A
EL3B
EcoZenith i360 3x400V
0.5
2.8
1
2.8
2
2.8
EcoZenith i360 1x230V
0.3
2.3
0.6
2.3
1.2
2.3
EcoZenith i360 3x230V
3
3
3
3
-
-
Factory settings 3X400
To give the total power for backup heating for 3X400 and 1x230, the power
on the active relays is added together; for 3x230V the total power varies
depending on the combination (see connection on wiring diagram). The
power may need to be adjusted to the building.
6.17
Current sensor connection
A current sensor with three sensors is used for product models with 400V
3N~ 50Hz (3x400V) and 230V 3N~ 50Hz (3x230V) connections (see
technical data).
The three current sensors, one for each phase, are fitted on the fuse panel.
Each phase from the electricity distribution board supplying the product
is channelled through a current sensor before termination at the relevant
terminal. This allows the phase current to be sensed all the time and
compared with the value set for the product’s load switch. If the current
is higher, the control unit drops to a lower heat output on the immersion
heater. If this is insufficient, the installed heat pump is also limited. When
the power drops back below the set value, the heat pump and electric
heater are reconnected. This means that the current sensors, along with the
electronics, prevent more power being supplied than the main fuses can
tolerate.
A main fuse of up to 35 A is permitted. If the main fuse is larger, a conversion
rate must be used.
The current sensors’ cable holes are 11 mm in diameter.
The current sensor connection has no alarm, but the current value can be
read in the Operation data menu. Note that the tolerance/accuracy is very
low with small current values.
Connect to sensor terminal block (see
wiring diagram). Use at least a 0.5 mm
2
cable.
6.18
Setting electrical output in backup
power supply
The DIP switch on the relay card (A2) is used to set the backup power
supply. The DIP switch is marked "RESERV" (BACKUP).
When the switch is set to ON, the step is actively operating in backup
heating mode. The factory-set mode is as shown in the image on the right.
Summary of Contents for EcoZenith i350 L 1x230V
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