Technical data

117
CTC EcoZenith i550 Pro
For the installer
16.6 Night reduction/ripple control
In the menu Installer/Settings/Remote control, select “NR” for night
reduction, “SO” for ripple control, “DHW” for additional hot water depending
on the desired function. When “SO” is selected, both the compressor
and additional heating are blocked; when “NR” is selected, primary flow
temperature/room temperature is reduced in line with the set value. Select
“DHW” to generate extra domestic hot water for the period set in “Add
DHW/time”. The function is activated when the poles on the PCB, positions
G33 and G34, are short-circuited.
16.7 Current sensor connection
The three current sensors, one for each phase, are fitted on the fuse panel in
the following manner.
Each phase from the electricity distribution board supplying the EcoHeat
is channelled through a current sensor before termination at the relevant
terminal. Then connect to the boiler based on the terminal board diagram.
This allows the phase current to be sensed all the time and compared with
the value set for the heat pump’s load switch. If the current is higher, the
control unit drops to a lower heat output. If it is still too high, further reduction
in output takes place. When the current has dropped below the set value
again, the output will increase.
This means that the current sensors, along with the electronics, prevent
more power being supplied than the main fuses can tolerate. The current
sensors’ holes for cables are 11 mm in diameter.
From electricity meter
Current sensor
Fuse panel
To boiler