- For use in heating installations with any fuel
- Rotary controller setup knob • Differential -0.4⁰C
- External ON-OFF switch • Heating system operation LED
- Operating voltage 230 V AC (RT-1, RT-2, RT-CH) & alkaline AAA batteries (RT-1B)
- 6A / 250VAC relay dry contact (RT-1, RT-2, RT-CH) & 4 (2) A for (RT-1B)
- Independent external circuit breaker for DHW, DHW operating system LED (RT-2)
- Independent external switch for switching from heating to cooling and vice versa, thermostat function LED for cooling systems.