Technical data
4
CTC EcoZenith i250 
Table of Contents
GENERAL INFORMATION
Checklist _____________________________________________________________________ 6
Important to remember!
 _____________________________________________ 7
Safety Instructions
 _____________________________________________________ 7
1.  Your home’s heating installation
 _________________________ 8
2.  Technical data
 ____________________________________________________ 11
2.1  Table 400V 3N~  ____________________________________________ 11
2.2  Table 230 V 1N~  ___________________________________________ 12
3. Measurements ___________________________________________________13
4.  CTC EcoZenith i250 design
_______________________________ 14
5.  Parameter list
 _____________________________________________________ 15
6.  Control system
 ___________________________________________________ 16
7.  Menu overview
 ___________________________________________________ 17
8.  Detail Description Menus
 __________________________________ 23
8.1  Start menu ___________________________________________________ 23
8.2  Description of icons _______________________________________ 23
8.3  Room temp. _________________________________________________ 24
8.3.1 Setting a room temp. without a room sensor __ 24
8.3.2 Outdoor Sensor/Room Sensor Faults _________ 25
8.3.3 Night reduction temperature ________________ 25
8.4 DHW ___________________________________________________________ 26
8.3.4 Holiday __________________________________ 26
8.4.1 Weekly program DHW  _____________________ 27
8.5  Operation data system ___________________________________ 28
8.5.1 Operation data EcoZenith __________________ 29
8.5.2 Operation Heating circuit ___________________ 30
8.5.3 Stored operation data ______________________ 31
8.5.5 Heat pump _______________________________ 32
8.5.4 Operation data heating _____________________ 32
8.6 Installer ________________________________________________________ 33
8.6.1 Time/Language ___________________________ 33
8.7 Settings _______________________________________________________ 34
8.7.1 Heating circuit 1 or 2 _______________________ 34
8.7.2 Set. heat pump ___________________________ 37
8.7.3 Electric heater ____________________________ 38
8.7.4 Upper tank _______________________________ 39
8.7.5 Remote control ___________________________ 40
8.7.6 Communication ___________________________ 40
8.7.7 Solar panels (accessories) __________________ 40
8.7.8 Sett. Diff termostat function _________________ 41
8.7.9 Pool _____________________________________ 41
8.7.10  Saving and loading settings ______________ 41
8.8  Define system _______________________________________________ 42
8.8.1 Def heating circuit 1 or 2 ___________________ 42
8.8.2 Def Heat pump ___________________________ 42
8.8.3 Define CTC SMS (accessory) ________________ 43
8.8.4 Define cooling (accessory) __________________ 43
8.8.5 Def Solar panels __________________________ 44
8.8.6 Define Differential thermostat function ________ 44
8.8.7 Def. Pool _________________________________ 44
8.9 Service _________________________________________________________ 45
8.10  Function test _________________________________________________ 45
8.11  Alarm log  _____________________________________________________ 47
9.  Operation and Maintenance______________________________ 49
10.  Troubleshooting/appropriate measures
 ___________ 50
10.1  Information messages ____________________________________ 53
10.2  Alarm texts ___________________________________________________ 54
INSTALLATION
11. Installation __________________________________________________________ 57
11.1 Transportation _______________________________________________ 57
11.2 Unpacking ____________________________________________________ 57
11.3  Standard delivery ___________________________________________ 57
12.  Pipe installation _________________________________________________ 58
12.1 Filling ___________________________________________________________ 58
12.1.1  Pressure drop in mixing valve _____________ 58
12.1.2  Pump curve charge pump ________________ 59
12.2  Schematic diagram ________________________________________ 60
12.3  Connection to heat pump _______________________________ 63
12.4  DHW system _________________________________________________ 65
13. Energyflex __________________________________________________________ 66
14.  Electrical installation
 _________________________________________ 69
14.1  Electrical installation 400 V 3N~  ______________________ 69
14.2  Electrical installation 230V 1N~  _______________________ 69
14.3  Positioning of electrical components _________________ 70
14.4  Electrical connection to heat pump ___________________ 71
14.4.1 Communication ________________________ 71
14.4.2  Heat pump power supply 400 V 3N~ ______ 72
14.4.3  Heat pump power supply 230V 1N~ _______ 72
14.4.4  Connecting the heat pump connector ______ 72
14.5  Extra low voltage protection ____________________________ 73
14.5.1  Remote-controlled temperature reduction __ 74
14.5.2  Current sensor connection _______________ 74
14.5.3  Terminal boards ________________________ 75
14.6  Settings made by the installation electrician. _______ 76
14.7  Installing a backup power supply ______________________ 76
14.8  Switching to 18kW electric heater power. _________ 77
14.9  Connection of pump (G46) to Diff.therm.func. ___ 79
14.10 Connection of sensor (B46) to Diff.therm.func. __ 79
14.11 Wiring diagram 3x400 V __________________________________ 80
14.12 Wiring diagram 1x230 V __________________________________ 82
14.13 Component list, wiring diagram ________________________ 84
14.14 Resistances for sensors __________________________________ 85
15.  Connection of CTCEcoAir520M heat pump ___ 86
15.1  Menu functions unique to the CTCEcoAir520M _ 87
15.1.1   Operation data heat pump _______________ 87
15.1.2  Heat pump Settings _____________________ 88
15.1.3  Heat pump Settings continued ____________ 89
15.1.4  Set Schedule Noise reduction ____________ 90
16.  First start ____________________________________________________________ 91
Declaration of Conformity
 ________________________________________ 93










