Technical data
39  CTC EcoZenith i250
General Information
Delay mixing valve  180 (30...240, blocked)
The mixing valve delay, the period before it draws 
energy from the immersion heater, is set here. It can 
be set from 30 to 240 minutes. If the value is set to 
”Blocked”, the mixing valve will never open to the boiler. 
(Blocked)
Main fuse A  20 (10...35)
The property’s main fuse size is set here. This setting 
and the fitted current sensors ensure the fuses are 
protected when using appliances which generate 
temporary power peaks, for example, cookers, ovens, 
engine heaters, etc. The product temporarily reduces 
power drawn where this type of equipment is being 
used.
Input voltage  3x400 V
The value is set here to indicate whether the CTC 
EcoZenith is connected at 3x400 V, 1x230 V or 3x230 
V. 3x400 V and 1x230 V are valid for the UK.
Tariff, EL  Off
Not applicable. Applies only to products marked “Tariff”. 
It must be set to Off.
8.7.4  Upper tank
(Applies only if a heat pump has been installed.)
Stop temp HP °C  Max. (40...58, Max.)
At this temperature, the heat pump stops charging the 
upper tank. 
Start/stop diff upper °C  7 (3...10)
Hysteresis before the heat pump starts or stops 
charging the upper tank.
Max. time upper tank  20 (10...150)
This is the maximum time in minutes spent by the heat 
pump charging the upper tank if required in the lower 
tank.
Max. time lower tank  40 (10...120)
This is the maximum time in minutes spent by the heat 
pump charging the lower tank if required in the upper 
tank. 
1 2
1 2
T ºC
60
40
20
0
-20
16  20  0  4  8 12
Radiatorsystem forts
  58 ºC  -5 ºC
Info golvtorkning estricht
Room temp.
Heating circuit 1
Night reduction Holiday
Room temp.
Heating circuit 1 (50)
Night reduction Holiday
Set. heat pump
Compressor   Permitted
1
Min outdoor temp °C  -15
2
Brine pump on    Auto
Tariff HP    Off
Minimum run time    6
Electric heater
Boiler upper°C    50
Boiler upper add°C    57
Boiler upper extra DHW°C  60
Boiler upper max kW    5.5
Boiler lower °C    55
Boiler lower max kW    6.0
Delay mixing valve    180
Main fuse A    25
Input voltage    3x400 V
Tariff EL    Off
Upper tank
Stop temp HP°C    Max
Start/stop diff upper ºC  7
Max time upper tank    20
Max time lower tank    40
Communication
MB address    1
Baud rate    9600
Parity   even
Stop bit    1
Installer
Save settings
Save settings
Load factory settings
Def Heat pump
Heat pump  Off
Flow/level switch  None
Test Heating circuit
Mixing valve1    Open
Rad pump1    On
Mixing valve2    Off
Rad pump2    Off
LED room sensor    On
Test valves
Test Elec.heater
3-way valve    Down
Electric heater L1A    Off
Electric heater L1B    Off
Electric heater L2A    Off
Electric heater L2B    Off
Electric heater L3A    Off
Electric heater L3B    Off
Electric heater A13    Off
Alarm log 
Latest alarm:  Time  HP (b) LP (b)  SH (K) I(A)
Low brine flow  07:20 6/3  8.8  3.3  15.9  3.9
Stored alarms:
Wrong phase order  10:30 1/3  27.9  8.6  -227  50.0
Com. err m. protect 09:01 1/3  27.9  3.6  42.2  0.0
Factory settings coded
Code  0 0 0 0
Upper tank 
Lower tank
Compressor operation
Expansion valve
Log compressor stop
Cooling
Operation data heating 2
Out  Room1 Prim1  Return Room2  Prim2
Test Heat pump
HP Compr.    Off
HP Brine p/Fan    Off
HP Charge p    0
Defrost Manually    Off
Compressor heat    Off
Drip tray heater    Off
Heating Cable    Off
4-way valve(Y11)    Off
Inst. Radiatorsystem1
<<
Anti Water Hammer    No
HP max DHW    Yes
Drying period mode    Off
Drying period temp ºC  25
 Room temp.  DHW  Operation  Installer
  Drying period activ  1  /  12  (25)
CTC EcoZenith  Monday 09:35










