How do I install the IMMERGAS 3.011668 Zone System Connection Kit?

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Installing the IMMERGAS 3.011668 Zone System Connection Kit involves several steps to ensure proper functionality. Always prioritize safety and disconnect the boiler's power supply before beginning any installation work. Here’s a detailed guide:

1. Power Disconnection: Before commencing the installation, ensure the boiler is safely disconnected from the power source by switching off the upstream switch.
2. Cable Management: Route the kit's electrical connection cables through the appropriate cable clamps. Securely tighten these clamps after making all electrical connections.
3. Zone Valve/Circulator Connections: Connect your zone valves or zone circulator pumps to terminal boards "X2" and "X4" of the zone kit. Ensure the earthing connection is made to terminal board "X3", following the numerical order assigned to each zone.
4. Thermostat Connections: Connect the contacts from your room thermostats to terminal board "X9" of the zone kit.
5. Boiler Integration: Integrate the zone control unit with the boiler by connecting terminal boards "X5" and "X15" of the zone control unit to the corresponding boiler connection terminal board. Remove any jumper cables present at terminal boards 40 and 41 of the boiler. During the summer months, if terminal 21 on your boiler isn't available, make sure that room thermostats don't request heat to avoid the unnecessary activation of circulator pumps and energy wastage.
6. Power Supply Connection: Connect the zone kit to the 230 V AC mains. This can be done by using an omnipolar switch and a suitably sized fuse based on the kit’s load. Alternatively, you can connect the 230 V AC power supply directly to terminals A and B on the boiler, but first, verify the absorption rate (fuse 3.15 A).
7. CARV2 Setup: Configure the CARV2 (Comando Amico Remoto) for On-Off operation, referencing the CARV2 instruction manual for detailed guidance. The CARV2 can control zone 1 in place of a room thermostat. When the CARV2 requests heating, the zone 1 relay (the primary zone) will activate.
8. External Circulator Pumps (Optional): If using external circulator pumps (up to a maximum of 3), install any one-way valves and regulating valves as needed. Review the flow rate/head graph in the boiler's instruction manual to determine the maximum flow rate within the boiler. For additional support, consult the Immergas Consultancy Service.

Remember, these instructions are a summary. For comprehensive and precise installation details, always consult the full IMMERGAS 3.011668 Zone System Connection Kit instruction manual.