Refurbished Q550 Q550 Zone:Zone 4 (56°N) Reserve none

Reserve none

Up to 48 ON and 48 OFF (96 operations per day)

This mechanical 2 wire tamper proof thermostat is very easy to install and having volt free contacts is suitable for systems with either a combination or normal boiler

Moisture Protection Ordinary: has no special protection against moisture

Popular applications for solar time switches include street

Refurbished Q550 Q550 Zone:Zone 4 (56°N) Reserve noneSangamo Q550 Astro Dials come in 4 variations depending on where you are in the British Isles the switch is adjusted to match the slight differences in sunrise and sunset times. Simply locate where you are on the map and add the number on to the end of the part number or select the equivalent zone. The ON operation always tracks SUNSET while the OFF operation can be made either to track SUNRISE, or to occur at a fixed time between 8: 30pm and 1: 00am.