Horstmann - CentaurPlus C27 - Series 2 - Two Channel 7 Day Programmer

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Secure Meters has developed the Liberty Gas 200 SMETS2 gas meter to meet UK smart metering requirements. The Nest Heatlink will need the usual Live and Neutral, from the same supply as the programmer etc, for it's power. oil combis work in different ways from gas combis, the easiest way for you is to take a cable from your existing 2 channel programmer lt;p>This is the Horstmann CentaurPlus C27, a two channel programmer which gives independent control over hot water and heating with up to 3 ON/OFF settings for each day of the week. It also has a 1 hour manual boost button for the hot water and an advance button for the central heating.</p> With what you propose, you are connecting CH and HW control wires to the same BDR91. 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. The same is true of terminals 1 and 2 if they are actually fitted.

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Having a few issues wireing in the Nest Heatlink - mainly trying to work otu what the current Common and Call-For-Heat connections are - have been looking at http://www.horstmann.co.uk/files/86..._guide_CentaurPlus_C21-C27_installer_web1.pdf but havent managed to work it out my self , we also have one thermostat on the system which will be replaced if that helps.Im pretty sure its as simple as connecting the live and earth from the C27 to both BDR91s, then C27 1&2 go to the BDR91 for heat conections B&C, C27 3&4 to the BDR91 for hot water B&C and a link L to A on both BDRs note it says Centaur Plus is volt free, so it seems the centaur plus is same as Hive single channel and standard one is same as Hive duel channel, so I would be hunting on the actual device to see if there is a diagram. Your picture clearly shows a brown sleeve on the blue wire going to 3 so clearly a line not neutral. lt;li>Operating periods per day: 3 per day for Central Heating and 3 per day for Hot Water</li>

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

The red cable from terminal 4 of the programmer will no longer be required and should be removed from the programmer and made safe (unless for some reason you want the programmer to still have some control over the heating which the following does not allow for).Now im after some help getting the hot water element up and running with the new nest to completely replace the Horstman C27. Override: 1 hour boost (Hot Water only), 1 hour extension to On period (Hot Water only), instant advance (Central Heating only) Hi.. Thanks for the reply. The C27 thats in place at the minute is working to the extent where I can turn the heating and HW on and off, Just not set timers, (screen is dead)

CentaurPlus C27 Series 2 User Operating Instructions CentaurPlus C27 Series 2 User Operating Instructions

Just done that and its all up and running - Thank you so much - Saved me alot of money there getting it installed. Many modern thermostats have a dead zone. If the temperature deviates less than 4°C from the set temperature, the system will not heat or cool. This so called dead zone of the thermostat prevents the system from turning on and off too often, saving energy. The Boiler is a Grant Vortex Pro External Combi21e, as the name suggests the boiler is outside in a casing so it's a bit more difficult to trace the wiring. The wiring is just to complicated for me to work out. Could anyone help with what wires go where on the heat link? So I have finally got round to doing this today and now having finally removed the C27, I only have wires on 3 & 4, Looks like I just connect these to B? But I believe I need a loop from the Second L to AThe best place for a thermostat is approximately 1,5 meter above the ground. Never place the thermostat nead a radiator or other heat emitting equipment or in direct sunlight. Choose a room that is used often. In most cases this is the living room. And this is what we have remaining for our horstman C27 which is controlling only the hot water now. -so the neutral and live on the left will come out will go straight into the new nest heatlink. Just wondering if somone could advise where the grey and white cable currently in number 1 and the brown one in number 3 will go within the hot water part of the heat link.

Replacing Horstmann C27 with Nest | DIYnot Forums Replacing Horstmann C27 with Nest | DIYnot Forums

Look at the wiring diagram for your make/mode of thermostat that you are removing. If you don't have the instructions for it, a diagram is usually printed inside the lid. This will show which are the two live switching wires, and which is the neutral wire. (If there is a neutral present. Not all thermostats need or have one fitted) We’ve got a very old centaur TC7 that is no longer readable, can I do a straight swap to this product?The honeywell system should then take care of the thermostat, however, there is a room thermostat that needs to be removed, and that part Im not sure of. I suppose I could set it on full and let the evohome do the job, but Id rather remove. Any tips? or anything I havent got right? If that's all correct then what do I need to connect the hot water and central heating commons on the nest heat link. I'm reading about jumpers from the live? Home > Home & Decoration > Thermostats > Horstmann Thermostats > Horstmann CentaurPlus C27 Thermostat Manual Horstmann CentaurPlus C27 Thermostat Have just moved into a flat with a trianco Aztec electric boiler paired with a Horstmann Centaurplus C27 programmer. Apart from a big white tank and (supposedly) knowing how to set the timer, that's as far as my knowledge goes with this system. My problem as far as I know is the timer. When I switch on the hw the water doesn't heat but the central heating gets hot!?. The ch light on the timer doesn't come on but the central heating defiantly gets hot. Same if I press the boost button, I hear the system start an the central heating comes on again, without the water getting hot. If I press the ch button the heating comes on fine. In short both the hw and ch buttons only turn on the ch?!