The Heating zone controller is set to the Zone Smart Thermostat, for me 1st Floor. So when the Smart TRV calls for heat it will activate the Zone controller this then switches the motorised valve for that heating zone which starts the pump and boiler. The Horstmann ChannelPlus H21XL thermostat is a home heating control device that allows users to easily manage their heating system. It is designed to be intuitive and user-friendly, providing a convenient way to regulate room temperatures. Jurian I have a similar issue with replacing a 3 channel programmer (Horstmann ChannelPlus H37XL Series 2).

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Furthermore, the H21XL thermostat has a built-in frost protection function, which prevents pipes from freezing during cold weather. This feature is particularly useful for homeowners who often leave their houses unoccupied for extended periods.I have installed a wired Tado thermostat to replace an existing CH zone room thermostat but need to get the Tado V3+ wireless thermostat installed to replace the other wired thermostat (currently above an oven) for the other CH zone and ideally the hot water as well. The H21XL thermostat features a clear display screen that shows the current temperature and settings, making it easy for users to monitor and make adjustments. It also offers programmable scheduling options, allowing users to set different temperature levels for different times of the day, ensuring optimal heating efficiency. We have an existing Horstmann H37 XL ChannelPlus on an oil-fired system. It has been in use for many years and works fine but changing the on/off times drives me nuts because each day has to be done separately. You wouldn't believe the number of button presses this involves. I note that the spec here says the timer has a Copy function? How does this work? Is this feature new or am I missing something on my old version of this timer? If this is a new feature I'd probably buy a replacement for this alone. Nope, nothing is missing. I do intend to tado my entire house, however tado can only support two channels - I need three.

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I understand you have to configure hot water control on one of the thermostats?You mention you asked Tado to reconfigure the extension kit to remove CH? How did you ask please? I'm wary of switching off the CH ON line from the extension kit to the 2 thermostats. As long is it stays always on, I know that's fine as the thermostat will do the switching. The copy functions copies one days timings to another day. It was present on older models. See the manual for details. Horstmann Central Heating Programmer - Holiday Setting. Horstmann Centaurplus c Mar 03, · Horstmann h37xl wiring diagram: Horstmann- Product Catalogue- Other sessions on the day looked at the upcoming changes within the 18th Edition of the BS Wiring Regulations – specifically looking at the introduction of Arc Fault Detection Devices (AFDD’s). Horstmann's ChannelPlus XL range is the Included in the range is the H37XL, the first programmer to offer three independently timed channels: Hot water plus two heating zones. Had a new boiler replaced so the electrician came to wire the boiler helped me to install the Tado system (He never did Tado before). So we read the instruction and wired.The thermostat is crafted using high-quality materials, ensuring its reliability and durability over time. It is designed to withstand everyday wear and tear, providing long-lasting performance. I Did have 3 zone controller from EHP exactly EHP R37-HW from original installation has been all electric valves all wiring as per EPH specification https://www.ephcontrols.com/wp-content/uploads/2017/05/CR32_P_WD_JW.pdf May I ask how you are controlling each room individually? Do you have tado TRVs installed in each room or something? I can't see how it's possible without them. Sparky, that explanation is a great help for me thank you. Could I trouble you with a couple of follow on questions please?