CTC Union EcoZenith i550 Pro, Installation And Maintenance Manual

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120 CTC EcoZenith i550 Pro
For the installer
The CTC EcoZenith i550 Pro is able to control either a third immersion
heater or an external additional boiler. Under no circumstance may these be
connected at the same time. To connect an additional boiler, the electrical
reconnection must be undertaken in the EcoZenith’s wiring. Please note
that all electrical reconnection and installation in the EcoZenith must be
performed by an authorised electrician. All wiring must be installed according
to applicable regulations.
1. Disconnect the electrical supply to the EcoZenith.
2. Make the hydraulic connections for the additional boiler and pump.
3. Remove the four screws holding the plastic front, two at the top and two
at the bottom, and then remove the plastic front. Ensure that the display
cable is disconnected before removing the front completely. The cable
is disconnected by pressing in the pin on the connector and pulling the
cable downwards.
4. Make the electrical connections for the pump and sensor as indicated in
the wiring diagram.
5. Disconnect the cable from output X7 18. Make sure the cable cannot
possibly come into contact with live parts and thereby cause a fault. The
cable end must be provided with an end cap or similar anti-touch blank-
ing, or else the cable can be completely removed.
6. Connect a relay for starting the additional boiler to output A29. Refer to
the wiring diagram for details.
7. Fit the front.
8. Switch on the electricity supply.
9. Define the additional boiler in the Installer/External boiler menu
10. The additional boiler (03) is now ready for use.
18. Installation of additional boiler