Technical data

CTC EcoZenith i250

Installation

13.5.1 Remote-controlled temperature reduction

The night temperature reduction function can be activated via a closed

function on the electricity remote control input, pins G33 and G34 on the

terminal board. The function can be controlled remotely using “Minicall”, for

instance.

While the input is short circuited, the temperature reduction is activated,

regardless of other settings. When the short circuit ceases, the product

returns to ordinary settings.

The size of the reduction is set in the menu: Installer/Settings/Radiator

system/Prim reduced.

NOTE: the input function can be selected according to the following:

• NR = Night reduction of temperature (time-controlled lowering of

temperature)

• SO = Shut off (compressor and power output blocked by the electricity

supplier)

• DHW = Extra hot water button (accessory)

13.5.2 Current sensor connection

The three current sensors (designated current transformer on the connection

block), 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 EcoZenith’s current monitor. 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.

From electricity meter

Current

sensor

Fuse panel

To boiler

Low current

Connection block

Use at least 0.5 mm

cable.