- On the Slimline RF V3 Press and hold the power button to turn the thermostat off.
- On the UH8-RF V2 Press and hold the zone number that you want to pair for 5 seconds with your finger and release.
- On the Slimline RF V3 Press the H button for 10 seconds until you see P1.
- Press the H button again on the Slimline RF V3.
- The zone light should go out on the UH8-RF V2 and the countdown should drop to 00 On the Slimline RF V3.
- Press A on the Slimline RF V3.
- For the next zones, repeat Steps 2-6.
- Once done, tap the power button back on the Slimline RF V3 to turn the thermostat back on.
- Turn the heating up and press A on the thermostat to test. Around 20 seconds later the zone lights should come on.