It's difficult to see what wires are in some of the terminals due to the angle of the photo, and it will be a bit of a guess as to where each of them go at the other end, because it's down to the installer’s preference and method of installation.

You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging . The Horstmann 425 Coronet thermostat is a heating control device used in domestic and commercial settings in the United Kingdom. day Wireless Programmable Room Thermostat with LoT Technology WHAT IS A PROGRAMMABLE ROOM THERMOSTAT?Place the thermostat about one and a half metres above the floor, not in the sun and not on an outside wall. Energy Saving Tips Nowadays when Energy costs are skyrocketing and the awareness to environmental issues is increasing, we all want to reduce energy consumption and have a greener lifestyle.

EVANS ELECTRONIC TEMPERATURE CONTROL TROUBLESHOOTING GUIDE for systems equipped with electric coolant valve and external PC board. Overall, the Horstmann 425 Coronet thermostat is a reliable and efficient heating control device that provides accurate temperature regulation for domestic and commercial environments. The thermostat is compatible with a variety of heating systems, including gas boilers, electric heaters, and underfloor heating.No 1 (red) 1st ON and No 2 (blue) 1st OFF - No 3 (red) 2nd ON and No 4 (blue) 2nd OFF The tappets may be moved in either direction. Some models switch the central heating and domestic hot water on and off at the same time; while others allow the domestic hot water and heating to come on and go off at different times. An advance switch is provided to make temporary overrides to the ON or OFF periods and a selector switch gives a further choice of programmes. The Coronet is particularly suitable for combi boiler systems, warm air systems and extra zone control.

TISSOT TWOTIMER SETTING INSTRUCTIONS The Twotimer is available in many different styles, in both round and rectangular cases but the setting instructions are identical for all. We are unable to deliver to the Isle of Scilly, Jersey, Guernsey, Northern Ireland, Isle of Man and the rest of Europe. The thermostat only switches on when, for example, the difference deviates more than 2˚C from the set room temperature.It uses a mechanical rotating 24-hour dial to set up to 2 on/off time periods per day as well as slide switches to adjust the on/off settings. The thermostat features a user-friendly interface with simple controls for setting the desired temperature. One small difference from the original is that it has no small neon "on" light, so if you have lost track of whether it is on or off you'll have to check to see what the boiler is doing (does it come on when you turn up the thermostat? I’m assuming here that you have a 3 port motorised valve, room thermostat and how water cylinder thermostat.