Technical data

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CTC EcoZenith i250
Installation
14.6 Settings made by the installation electrician.
The following settings shall be made by the installation electrician after
installation:
• Select main fuse size
• Select the power limitation for the immersion heater.
• Check room sensor connection
• Check that the sensors connected indicate reasonable values.
Carry out the following checks:
Main fuse and effect limitation settings
See the chapter on First start.
Check room sensor connection
• Go to the menu: Installer/Service/Function test/Radiator system.
• Go down and select the option LED room sensor and press OK.
• Select On using the + button and press OK.
Check that the room sensor LED lights up. If not, check the cables and
connection.
• Select Off using the - button and press OK. If the OK LED goes off, the
check is complete.
• Return to start menu by pressing the Home button.
Check connected sensors
If any sensor is incorrectly connected, a message will appear on the display,
e.g. “Alarm sensor out”. If several sensors are incorrectly connected, the
different alarms are displayed on different rows.
If no alarm is displayed, the sensors are connected correctly.
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.
14.7 Installing a backup power supply
The DIP switch on the PCB 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.
3x400 V
Switch 5 4 3 2 1
Phase L3 L2 L2 L1 L1
Current 10 A 10 A 2.6 A 10 A 1.3 A
Power 1.2 kW 2.3 kW 0.6 kW 2.3 kW 0.3 kW
1x230 V
Switch - 4 3 2 1
Phase - L2 L2 L1 L1
Current - 8.7 A 8.7 A 8.7 A 13 A
Power - 2.0 kW 2.0 kW 2.0 kW 3.0 kW