Compatibility and System Design
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      Dual-Zone Compatibility & Installation Design Guide

      ✅ Pre-Installation Checklist

      Before installing a dual-zone system with Homely, confirm the following:

      1. Check Heat Pump Compatibility

        1. Consult the heat pump manufacturer’s documentation to confirm that the model supports dual-zone control.

        2. Check the heat pump is compatible with Homely’s dual zone brand limitations

      2. Order the Second Homely Node

        1. A second temperature node must be purchased through an approved distributor.

        2. The additional node supports independent optimisation for each zone and carries a higher cost than a standard replacement node due to the extra modelling and data processing involved.

      3. Configure the System in the Installer App

        1. During setup, add the second node in the Homely Installer App to represent the additional zone.

        2. Assign clear, unique names to each node and the nodes are assigned to the correct zone

        3. Match the zone configuration on the heat pump controller with that in Homely to avoid control mismatches.

      4. Commission and Verify Operation

        1. Follow the manufacturer’s commissioning guidance to ensure both zones operate correctly before connecting Homely.

        2. Confirm correct sensor placement, wiring, and communication with the heat pump.

        3. Run a test to verify that both zones respond correctly to their respective set points.

           

          ⚙️ System Design Considerations

           

          Established System Configuration: Independent Modulating Flow Temperatures

          The best results are achieved when both zones can modulate their flow temperatures independently. This allows Homely to optimise each circuit separately, improving comfort and efficiency.

          • This can be achieved by integrating an electronic mixing valve on one circuit.

          • Not all heat pumps support this configuration—consult the manufacturer for guidance.

          • Independent modulation prevents one zone from forcing the entire system to run at a higher temperature, maintaining better efficiency.

           

          Alternative Setup: Shared Flow Temperature

          Homely also supports systems where both zones share a single flow temperature and are controlled via zone valves or circulation pumps.

          • In this case, when both zones call for heat, the heat pump runs at the higher required temperature.

          • Some systems include a thermostatic mixing valve for lower-temperature circuits such as underfloor heating.

          • These configurations work reliably but limit Homely’s optimisation capabilities since mechanical valves cannot modulate flow temperatures.

           

          💡 Installer Notes

          • Homely does not control pumps, mixing valves, or other hydraulic components directly. It sends a target flow temperature for each zone, which the heat pump’s own control logic interprets based on commissioning and setup.

          • Thermal interaction (for example, warm air from one zone affecting another) may reduce perceived efficiency and should be explained to the homeowner.

           

          🏠 What the Homeowner Sees

          Once installed, both zones appear in the Homely app. The homeowner can adjust each zone’s temperature independently.