Not sure why you're trying to do things the hard way.
There is a 24 volt versionWhat the OP wants will require mains voltage,
Open discussion tends to cover all aspects and hence a lot of posts,and I can't believe this thread has got to 2 pages.
Can you explain why it is ridiculous.Its patently ridiculous to apply
There is a 24 volt version
Can you explain why it is ridiculous.
inside of a morning, you can have the system fitted tested and functioning precisely as intended with zero disruption to house
The Horstmann HRFS1 Programmable Room Thermostat only £67 lost RF signal and as a result heating got stuck on, so with wireless you need the expensive thermostat to ensure it does not fail due to RF interference.
The Honeywell Y6630D Wireless Room Thermostat does this, although I think 1/2 hour not 5 minutes, the Horstmann HRFS1 Programmable Room Thermostat does not, after finding the fault I started to read instructions, and it seems only the expensive models have this feature. But look at adverts and the Honeywell Y6630D Wireless Room Thermostat does not advertise that it has the safety feature or that it has anti-hysteresis software, you need to read the installation instructions carefully to find this out.That is bad. The system should be that the thermostat sends regular "Heating ON" commands every 5 minutes when heating is required. The receiver at the boiler turns the boiler ON when it receives a "Heating ON" command but only for 6 minutes. If another "Heating ON" command is received before the 6 minute timer runs out the timer is reset for another 6 minutes of heating. If a "Heating OFF" command is sent and received the boiler shuts down. If the "Heating OFF" command is sent but not received then the boiler only runs unnecessarily for less than 6 minutes before being shut down when the timer expires. ( timings can be other than 5 and 6 minutes )
I will just wait to see if I get anything back from Honeywell then buy a couple next week and report back here. Thanks to all who responded.
Peter
I just got an email back from Honeywell. I had described my application and asked them to confirm that I would be correct to order MT4-230S-NC. They say they cannot advise on product selection and invite me to type my postcode into their "Find an installer" web page!
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