Recent content by Batt

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    Replacing failed Danfoss 103 timer

    I'm not disagreeing - I'm just trying to establish the reason why it would be completely wrong to add a room stat.
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    Replacing failed Danfoss 103 timer

    Thanks for your advice again Ian. Just for my understanding, what is the reason that I can't add a room stat without zone valves? I understand that the HW won't come on if the room temp is above the limit set on the room stat. Agree this is not ideal, but we usually have immersion timed to come...
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    Replacing failed Danfoss 103 timer

    Ok, thx Ian. To summarise: I have an open vent, pumped HW system. CH and HW are switched on/off together by single-channel Danfoss 103 electro-mechanical dial timeswitch. There are no zone valves or thermostats in the system apart from the one on the return feed, integrated in the boiler. Also...
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    Replacing failed Danfoss 103 timer

    Nothing else around it. Just radiators, which just have simple valves on them, not thermostatic ones. Flat is on a single floor. Top floor with loft directly above.
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    Replacing failed Danfoss 103 timer

    Aha! Thank you for the correction and explanation, Ian. That makes sense. However, I've just been reading about fully pumped, Y plan and S plan systems and none of them seem to match my system. It looks like they all have valves which allow HW and CH to be switched on/off independently. My...
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    Replacing failed Danfoss 103 timer

    Oh ok. Thanks Ian. I thought it was known as a "gravity fed" HW system, because it is fed from a large water storage tank in my loft. Apologies if it's not the correct term. What is the correct name for this type of hot water system? There is also a small "expansion" tank up there (if that is...
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    Replacing failed Danfoss 103 timer

    Thanks again Ian, but I am not able to switch HW and CH on/off independently. My existing Danifoss 103 just has on/off which lights the boiler, starts the pump and heats both radiators and HW cylinder. There are no zone valves, as far as I know. We manage with this arrangement by having boiler...
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    Replacing failed Danfoss 103 timer

    Thanks Pete. Yes I have been considering the 103e7 and 103e5 (looks like the single channel equivalent of the 103e7). Looks nice and easy to fit, but is there an option to add a room stat? Assuming it's advisable to add a room stat, I was thinking a wireless stat would be easier, but I might be...
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    Replacing failed Danfoss 103 timer

    Thanks for your quick reply, Ian :) Happy to stay single zone/channel, as I spoke to a plumber a few years ago about separating the HW/CH and it looks like a big job in my flat, with lots of floorboards/carpet coming up. We're not planning to stay very long, so looking for a relatively easy (and...
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    Replacing failed Danfoss 103 timer

    Hi, My flat has an old pumped central heating and gravity hot water system controlled by a Danfoss 103 electric-mechanical timeswitch. [Correction from ianmcd, below: It is not gravity HW. It is an open vent system with pumped HW]. No room thermostat. Hot water and heating cannot be switched...
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