How to install the Passiv Smart Thermostat with a Baxi heat pump

To install the Passiv Smart Thermostat with Baxi heat pumps, for either 1 or 2 zones with wired or wireless Thermostats, follow the steps below. 

1. Check compatibility
   View all compatible Baxi heat pumps at Baxi supported heat pumps.
2. Follow the Installation Guide
   This is included in the box, or you can download a digital version of the Passiv Smart Thermostat Installation Guide.
3. Connect the RS485 Modbus wiring
   All necessary RS485 Modbus connections can be found in Baxi RS485 connections.
4. Check the heat pump settings
   Make sure that all settings on the Baxi indoor controller are set to their default values.
5. Commission the Passiv Smart Thermostat
   Follow the instructions on the Programmer to commission the Passiv Smart Thermostat. You can find a video guide on commissioning on our YouTube channel.

If you have followed the steps above and are having problems with the installation, follow the guidance at Baxi troubleshooting.