Technical data

35 CTC EcoZenith i250
General Information
8.7.3 Immersion heater
Upper boiler °C 50 (30 to 60)
Temperature when the immersion heater kicks in
and helps EcoZenith i250 to produce domestic hot
water when there is great demand. A low setting is
recommended.
The immersion heater is also responsible for providing
the house with additional heating. If the house requires
a higher temperature than that selected, the control
system compensates by automatically raising the
temperature of the immersion heaters.
This temperature also reflects the settings chosen under
DHW.
Upper boiler add heat °C 57 (30 to 70)
The temperature of the boiler when EcoZenith i250
calls for assistance to reach the high temperature; the
immersion heater then works up to this value after the
set time delay on the mixing valve.
Upper boiler extra DHW 60 (30 to 70)
This means the boiler is to provide extra DHW. This
setting determines whether the electric heater should
help to produce extra hot water. Set the temperature
of the electric unit to the desired value when the option
for extra hot water is activated under the DHW menu.
A lower value means that the heat pump produces the
majority of hot water, not the immersion heater.
Upper boiler max. kW 5.5 (0 to 9.0)
You set the max. permitted power for the immersion
heater here.
Setting for the maximum permitted power for the
electric unit. 0 to 9.0 kW in steps of 0.3 kW.
Lower boiler °C 55 (30 to 70)
Setting for the temperature of the lower immersion
heater.
1 2
1 2
T ºC
60
40
20
0
-20
16 20 0 4 8 12
Room temp.
Heating circuit 1
Night reduction Holiday
Room temp.
Heating circuit 1 (50)
Night reduction Holiday
Heat pump
Compressor Permitted
Min outdoor temp °C -15
Brine pump on 10 days 0
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
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
Save settings
Save 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
Comm. error motor 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
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
Tariff HP
This is used when a dual tariff is used with lower energy
costs at set hours of the day. The heat pump can then
take advantage of reduced primary energy costs. It
must be set to Off.
Min oper. time 6 (0 to 20)
Minimum operating time in minutes that the compressor
is permitted to operate. Even if the tank’s stop
temperature has been achieved, the compressor
continues to supply energy during this period.