Technical data
92
CTC EcoZenith i250 
Installation
!
Save these 
settings under: 
Installer/Settings/
Save settings
First start
Switch on the power using the safety switch. The display comes on. 
CTCEcoZenithi250 now asks the following:
1.  Select language and press OK
2.  Confirm that the system is filled with water and press OK. Press next.
3.  Size of main fuse Choose between 10 and 35 A.
4.  Enter the supply voltage 3x400 (1x230/3x230 apply only to export 
variants)
5.  Specify the maximum electric heater power. Choose between 0.0 and 
9.0 kW in different steps. 
This applies to electric heaters in the upper tank.
6.  Select the option permitting the compressor (if the collector system is 
ready or the air/water pump is already installed). When the compressor 
is started for the first time, it is automatically checked that it is running in 
the correct direction. An error message is displayed in the panel display 
if it is rotating in the wrong direction. Switch any two phases to change 
the direction of rotation. 
7.  Brine pump On, Auto (Auto/10d/On) (For CTC EcoHeat/EcoPart only) 
Auto means that the brine pump is automatically operating at the same 
time as the heat pump (factory setting). 
10d means that the brine pump is running continuously during the first 
10 days in order to assist with bleeding. 
“On” means that the brine pump is running constantly.
8.  Specify max. primary flow 1 °C for radiator system 1.
9.  Specify inclination 1 for radiator system 1.
10.  Specify the adjustment for radiator system 2.
11.  Current sensors identified. The CTC EcoZenith i250 then starts and the 
start menu appears.
12.  Enter the set values in the parameter list so that the customer knows 
what has been set in addition to factory settings during installation. 










