Technical data
16
CTC EcoZenith i250 
General Information
6.  Control system
The CTC EcoZenith i250 has an advanced yet 
straightforward control system with a touchscreen on 
which all settings are entered directly.
The CTC EcoZenith i250 control system:
•  monitors all functions in the system tank, heat 
pump and heating system.
•  Permits individual settings
•  Displays desired values, such as temperatures, 
operation times, energy consumption and fault 
signals.
•  Facilitates the setting of values and troubleshooting 
in a simple and well-structured way.
Factory values
The CTC EcoZenith i250 is delivered with set factory 
values which are suitable for a standard house with 
a standard radiator system. The CTC EcoZenith i250 
automatically adjusts the water temperature to the 
primary flow’s current heating requirement. This is 
monitored by the control system, which continuously 
ensures that you are provided with optimum function 
and economy. These values are easy to change as and 
when required. Ask your installer to help you determine 
the correct values.
Heat pump
On delivery the CTC EcoZenith i250 is ready for 
connection to a CTC heat pump – either the CTC EcoAir 
400 outdoor air heat pump, the CTCEcoAir 520M or 
the CTC EcoPart400 bedrock/ground source heat 
pump. 
NB: Note that the connection of the CTC EcoAir520M 
inverter is dealt with in a separate section!
This means that the control system already contains all 
the controls for the heat pump. When the heat pump 
has been defined (On) the CTC EcoZenithi250 senses 
which heat pump has been connected 
Installer/Define/Heat pump 
Once this has taken place the menus for the heat pump 
are displayed. On delivery the compressor is blocked 
and must be set to permitted. This is done under the 
Installer/Settings/Heat pump menu.
Menu structure 
The product’s menus are described on the following 
pages. First there is an overview and then each menu is 
described in detail.
 Svenska  Nederlands  English  Deutsch
 Suomi  Française  Dansk  Norsk
1 2
1 2
  22,2 ºC  21,2 ºC  58 ºC  -5 ºC
1 2
1 2
1 2
1 2
1 2
T ºC
60
40
20
0
-20
16  20  0  4  8 12
00 - 06  22 - 24
00 - 06  22 - 24
00 - 06  22 - 24
00 - 06  22 - 24
00 - 06  23 - 24
00 - 08   23 - 24
00 - 08   22 - 24
06 - 09  18 - 21
07 - 09  -- - --
08 - 09  -- - --
08 -  --  --  - 21
08 -  --  --  - 21
10 - 12   20 - 23
10 - 12   20 - 23
  Room temp.  DHW  Operation  Installer
CTC EcoZenith  Monday 09:35
Night reduction Holiday
Heating circuit 2 (50)
Heating circuit 1
Room temp.
Start menu
Room temperature settings
Selecting DHW comfort
Heating system data
Installer settings menu
Extra
Hot water 
0.0 hours
On
Temperature
Normal
Weekly schedule
DHW
Operation data system
Status HP upper tank
Tank upper°C    49 (58)
Tank lower°C    42 (45)
Electric power kW    0.0+2.5
Current L1/L2/L3 0.0 0.0 0.0
Diff func. Pump / ºC    On 32
Pool ºC Off 22(20)
Operation data EcoZenith
Stored oper data
Heating circuit
Operation data heating
Installer
Time/Language  Settings  Define system  Service
Software display PCB:  20120205
Software HP PCB:  01234
Installer
Installer
Time 21:34
Date 2012-02-05
Settings
Heating circuit 1
Heating circuit 1
Heating circuit 2
Heat pump
Electric heater
Upper tank
Remote control  None
Communication
Solar panels
Diff thermostat function
Pool
Save settings
Load settings
Load factory settings
Max primary flow°C    55
Min primary flow°C    Off
Heating off, out°C    18
Heating off    120
Inclination°C  50
Adjustment°C  0
Room temp reduced°C  -2
 or
Primary flow reduced°C  -3
>>
Define system
Def heating circuit 1
Heating circuit 1
Heating circuit 2
Heat pump
CTC SMS
Cooling
Solar panels
Diff thermostat function  No
Pool (G50, G51, B50)    No
Heating circuit 1    Yes
Room sensor 1    Yes
Type    Wire
Service
Function test
Function test
Alarm log
Factory settings coded
Quick start compressor.
Software update, USB
Write log to USB
Control current sensors
Re-installation
Heating circuit
Heat pump
Valves
Electric heater
Solar
Diff thermostat function
Pool
Total operation time h:  14196
Max primary flow°C:    51
Consumtion kWh    20
Compressor:
 Total Operation time    1540
Stored oper data
Heat pump
Compressor On
Charge pump  On 47%
Brine pump  On
HP in/out°C  35.5 / 42.3
Current L1  4.0
Night reduction heat circ.
Weekly program  Block  NR
Decrease  Sunday 22:00
Increase  Friday 14:00
Decrease  -------- 00:00
Increase  -------- 00:00
Holiday
Holiday period  3 days
Out  Room1 Prim1  Return Room2  Prim2
Settings language
Night reduction heat circ. 1
Weekly program  Day by day  NR
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Weekly program  Day by day  DHW
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Weekly program DHW
1 2
  Dansk  Nederlands  Čeština
  Svenska  Norsk  English
  Eesti  Polski  Slovenščina
  Deutsch  Suomi  Française
Operation data system
Define Cooling
Cooling   No
Common heating/cooling  No
Condense pipe secured  No
Room temp. cooling    25.0
Def heating circuit 1
Heating circuit 1    Yes
Room sensor 1    Yes
Type    Wire
Def heating circuit 1
Heating circuit 1      Yes
Room sensor 1      Yes
Type      Wireless
Action   
Disconnect
Status   
Associated
Level of signal
Battery     85%
Version     x0102
Def CTC SMS
Activate      Yes
Level of signal 
Phone Number 1  +46712345678
Phone Number 2  -----------------
Hardware Version   1 1
Software Version    1 9
Pump H-tank (G46)      Off
Temperatures
H-tank (B6) ºC      32
Test Diff thermostat function
Charge start diff temp ºC
7
Charge stop diff temp ºC
3
Charge temperature °C    60
Sett. Diff termostat function
Holiday
Cooling    20.2 (20.0)
Heating circuit 1    20.2 (20.0)
Room temp.
Night reduction
Op. Heating Circuit
Primary flow1 ºC  33(34)
Return flow ºC  31
Radiator pump  Till
Mixing valve  Open
Delay mixing valve  180
Primary flow 2ºC  33(34)
Radiator pump 2  Från
Mixing valve 2 
Settings language
Settings language
The screen shows operating information with the 
CTC EcoAir heat pump connected.
The screen shows operating information with the 
CTC EcoPart heat pump connected.
Start menu
 Svenska  Nederlands  English  Deutsch
 Suomi  Française  Dansk  Norsk
1 2
1 2
  22,2 ºC  21,2 ºC  58 ºC  -5 ºC
1 2
1 2
1 2
1 2
1 2
T ºC
60
40
20
0
-20
16  20  0  4  8 12
00 - 06  22 - 24
00 - 06  22 - 24
00 - 06  22 - 24
00 - 06  22 - 24
00 - 06  23 - 24
00 - 08   23 - 24
00 - 08   22 - 24
06 - 09  18 - 21
07 - 09  -- - --
08 - 09  -- - --
08 -  --  --  - 21
08 -  --  --  - 21
10 - 12   20 - 23
10 - 12   20 - 23
  Room temp.  DHW  Operation  Installer
CTC EcoZenith  Monday 09:35
Night reduction Holiday
Heating circuit 2 (50)
Heating circuit 1
Room temp.
Start menu
Room temperature settings
Selecting DHW comfort
Heating system data
Installer settings menu
Extra
Hot water 
0.0 hours
On
Temperature
Normal
Weekly schedule
DHW
Operation data system
Status HP upper tank
Tank upper°C    49 (58)
Tank lower°C    42 (45)
Electric power kW    0.0+2.5
Current L1/L2/L3 0.0 0.0 0.0
Diff func. Pump / ºC    On 32
Pool ºC Off 22(20)
Operation data EcoZenith
Stored oper data
Heating circuit
Operation data heating
Installer
Time/Language  Settings  Define system  Service
Software display PCB:  20120205
Software HP PCB:  01234
Installer
Installer
Time 21:34
Date 2012-02-05
Settings
Heating circuit 1
Heating circuit 1
Heating circuit 2
Heat pump
Electric heater
Upper tank
Remote control  None
Communication
Solar panels
Diff thermostat function
Pool
Save settings
Load settings
Load factory settings
Max primary flow°C    55
Min primary flow°C    Off
Heating off, out°C    18
Heating off    120
Inclination°C  50
Adjustment°C  0
Room temp reduced°C  -2
 or
Primary flow reduced°C  -3
>>
Define system
Def heating circuit 1
Heating circuit 1
Heating circuit 2
Heat pump
CTC SMS
Cooling
Solar panels
Diff thermostat function  No
Pool (G50, G51, B50)    No
Heating circuit 1    Yes
Room sensor 1    Yes
Type    Wire
Service
Function test
Function test
Alarm log
Factory settings coded
Quick start compressor.
Software update, USB
Write log to USB
Control current sensors
Re-installation
Heating circuit
Heat pump
Valves
Electric heater
Solar
Diff thermostat function
Pool
Total operation time h:  14196
Max primary flow°C:    51
Consumtion kWh    20
Compressor:
 Total Operation time    1540
Stored oper data
Heat pump
Compressor On
Charge pump  On 47%
Brine pump  On
HP in/out°C  35.5 / 42.3
Current L1  4.0
Night reduction heat circ.
Weekly program  Block  NR
Decrease  Sunday 22:00
Increase  Friday 14:00
Decrease  -------- 00:00
Increase  -------- 00:00
Holiday
Holiday period  3 days
Out  Room1 Prim1  Return Room2  Prim2
Settings language
Night reduction heat circ. 1
Weekly program  Day by day  NR
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Weekly program  Day by day  DHW
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Weekly program DHW










