"And HTF have they ended up with cables and protocols which can be corrupted by "spurious stuff"? It's surely not high-speed long distance. Do the OpenTherm crowd not have a clue?"
Multizone OT is volatile & sensitive at the best of times relying on Wifi (for the App) RF and good signal is critical. Making sure the signal isnt corrupted is just one more pre-emtive move to reduce nuisance faults. I use 12 & 16mm glands always with YY & CY cable into IP rated boxes (obviously lots of the controls are in & around potentially wet areas. I think between you all you have given me the idea I needed - a gland similar to armoured cable so I can clamp the screen use a washer with a tag & then a bit of earth cable to the connector block. The only down sdide to this is the CY for the OT is 2 x 0.5 so very small in diameter. I am not sure what your statement means nor who the HTF are and again 'long distance' is relative - some runs are perhaps 20M+. probably not long to you guys but when comms faults do arise its good to know its not due to incorrect cabling. One less thing to eliminate. Fault finding OT on a good day is bad enough as often all you can do is shout at it lol. Having said all that - when its working OT controlled heating will save the planet! Set points are just that - set- and modulating low flow temps ensure low flue temps & maximum condensation. As from April all boilers must be OT compliant (& I believe fitted with OT controls). This of course wont happen as there is no OT police but if any of u need a boiler after April make sure you get a OT control stat (with or without the App) As a foot note I would rather not use a armored cable type gland as it will be really clunky but instead deal with it inside the IP box. This pic is not an OT application but gives an idea of the scale of heating electrics (small!) Thanks for all you ideas.
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