Then, if you wish to use the old thermostat cable to connect the Heat link to the Nest thermostat, you need to disconnect the old thermostat, trace the thermostat cable back to its origin. and if it is a 240v live circuit then would it work to take the wire from 3 (L to HW on the boiler) and make it permanently live off the live at the L terminal from the spur? Just done that and its all up and running - Thank you so much - Saved me alot of money there getting it installed. We have bought a new Nest Thermostat to replace our current Horstmann C27 which runs our Central heating and Hot Water on a timed system, we have a Netaheat Profile 303 Boiler. We also have two manufacturing partnerships in Malaysia and Ghana, which have enabled us to contribute to the swiftly emerging and major markets of Africa and South East Asia.

HEATING PROGRAMMER REPLACEMENT AND WIRING GUIDE - TLC Direct HEATING PROGRAMMER REPLACEMENT AND WIRING GUIDE - TLC Direct

There are also frequently asked questions, a product rating and feedback from users to enable you to optimally use your product.For example terminal 3 is a HW control wire and terminal 4 is CH control wire, yet you propose to connect them both to the BDR91 for hot water. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. you could put a link in the boiler and the HW will be hot 24/7 and the hive will control the heating then you can remove the old programmer completely, assuming you dont have any other controls like zone valves or other thermostats, or take the single channel hive back and get a dual channel one. If the temperature deviates less than 4°C from the set temperature, the system will not heat or cool. If so looking for suggestions, is it just a case of bridging the HW on (neutral) into the perm neutral.

Trianco Aztec/ Centaurplus C27 problems? | DIYnot Forums Trianco Aztec/ Centaurplus C27 problems? | DIYnot Forums

You can now disconnect all of the wires going to the old thermostat and remove the cable and thermostat.

The yellow wire that was connected to the old room thermostat should be removed from the block and instead a wire from this connector should go to the Heatlink terminal 3. Personally I would not modify until the summer, I would want time to locate parts, and get things fixed and not be in a panic to get heating up and running again fast. uk/secure-centaurplus-two-channel-7-day-programmer-12142/ 41505 Secure CentaurPlus Two Channel 7 Day Programmer https://www.