Recent content by infrequentuser

Thanks D_Hailsham Your FAQ is good at explaining how the valve head can be energised when there is no call for HW and no call for CH. You suggest this can lead to the valve becoming fairly warm. The reason I posted this query was that I was surprised just how warm/hot it often seems to...

Apologies for the delayed response - I've been tied up with other matters. I'm afraid I don't know whether the diverter valve has been getting very hot only recently or for a longer time. By way of more background, the CMT927 was fitted about a year ago and seemed to function perfectly since...

My house had a Danfoss "RMT230 (with parallel accelerator)" fitted as a room stat to a metal back box. The stat is supplied by a 3-core-and-earth cable with old colours : Red, Yellow, Blue and "Bare". By inspecting the wiring arrangement of the RMT230 and by checking the Red and Yellow...

I understand a battery powered Danfoss TP5000Si should be wired as follows : Live = Terminal 2 (COM) & Switched Live = Terminal 3 (NO/ON) What would happen if these were incorrectly wired wrongly as : Switched Live = Terminal 2 (COM) & Live = Terminal 3 (NO/ON) What would...

Thanks for the confirmation. It is good to know thay I have got it right. :D Any special reason for prefering the Siemens REV24RF over the Honeywell CM927 ? :?:

I am considering replacing my current wired stat because it is not located in a good location : it is above a radiator in a fairly cold & drafty hallway. It seems to me that the easiest way to replace the current stat would be with a wireless stat by wiring the new base unit or 'receiver' in...

Any other views ? Does everybody feel 3 cycles per hour is the best setting for a 'cast iron' boiler radiator system ? Thanks again.

Thanks for the advice/comment. Cost is not a significant motivation - I just think the programmable stat offers me more flexible control. In terms of the CPC setting, are we all agreed that 3 cycles per hour looks the best bet ? Does anyone have a contrary view ? Thanks

Slight correction : The default on the battery version of the TP5000Si is 6 cycles per hour not the 3 cycles per hour I quote above. However, the default for the mains powered version seems to be 3 cycles per hour. Difficult for me to understand why these differ.

I've just upgraded my stat from a Danfoss RMT230 to a Danfoss TP5000Si. One of the facilities offered by the new stat is Danfoss' "Chrono Proportional Control" (CPC). I'm unclear as to the best setting (number of cycles per hour) to use for the CPC. The stat offers a choice of 3, 6, 9...

Many Thanks for your clear and prompt response.

Thanks again for your comments. Just to be 100% clear, you would prefer wiring for the TP5000MSi to be as follows : 2) Mains Powered Yellow → Heating Terminal 3 (NO/ON) Red → Electronics Terminal C (L) Blue → Electronics Terminal B (N) Earth → Back Box...

I've now been able to go inside my current stat and have confirmed that it is indeed a Danfoss RMT230 (with parallel accelerator) and is fitted to a metal back box. The cable is 3-core-and-earth with old colours : Red, Blue, Yellow and "Bare". Connections are currently wired as follows ...

Thanks for this. Didn't manage to get the time to go inside the current stat today - will do it during the week. But, from what you say, the battery version would be the safe bet (ie would work with either 2 or 3 wires) whilst the mains version has the obvious advantage of not needing...

By examining the outside of the current thermostat (not been inside yet - will do tomorrow), I believe I have a RMT230. How can I tell if I need to replace my current stat with a battery powered or mains powered version of the TP5000Si ? Thanks :?: