Technical data
15  CTC EcoZenith i250
General Information
Radiator system Factory 
value
User (set) 
value
Max. primary flow °C  55
Min primary flow °C  Off
Heating off, out °C  18
Heating off, time  120
Inclination °C  50
Adjustment °C  0
Room temp red  -2
Primary flow reduced  -3
5.  Parameter list
Upper tank Factory 
value
User (set) 
value
Stop temp HP ºC Max.
Start/stop diff ºC 7
Max. time upper tank 20
Max. time lower tank 40
Immersion heaters Factory 
value
User (set) 
value
Boiler upper °C 50
Boiler upper add °C 57
Boiler XVV °C 60
Boiler upper max. kW 5.5
Boiler low °C 55
Boiler low kW 6.0
Delay mixing valve 180
Main fuse A 20
Input voltage 3x400 V
Tariff EL Off
Heat pump
Compressor Blocked
Brine pump on 10 days 0
Tariff HP Off
Minimum operating time 6










