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    Installing frost protection on existing S plan system.

    Thanks guys. The pipe work, as far as I know, is fully insulated but I shall make sure to check with the owner before we start the job which I have been nagging him to do since he bought the place 5 years ago but no, we end up doing it in the depths of winter. Brian
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    Installing frost protection on existing S plan system.

    Hi guys. About to fit full frost protection on a friend's existing S-plan system. The oil boiler and associated twin zone pipework and valves are in an exposed and uninsulated boiler room annexe to the main house. There is a run of both sets of pipework from this annexe into the insulated (so...
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    Replacing Horstmann 425 with Hive (again)...

    Well, yet another lockdown. But, before we all got sentenced, I finally managed to get everything working. I followed John's excellent advice and moved the Hive receiver to the airing cupboard. This meant that there were enough cables to re-jig everything without having to venture into the loft...
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    Replacing Horstmann 425 with Hive (again)...

    Now...why didn't I think of that :) That is thinking outside the box. The only thing in the garage is the boiler and the supply and putting the receiver in the airing cupboard with everything else is much more convenient for the lady owner. I remember replacing a 40m bundle of 40'odd way cable...
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    Replacing Horstmann 425 with Hive (again)...

    Excellent idea. If she decides to do this, can she still have hot water only? Also, when I get around to adding the additional wire (its a 10m run through a con-block gable wall and an almost inaccessible loft space) how does she turn the Hive back to 'normal' operation? Is it just the same...
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    Moving home, moving Hive...

    Well, here we are, not far off a year later and with Covid having stolen 3 or four months out of our lives. One hopes all of you and yours have come through unscathed. Eventually, having sorted out the heating system wiring in the house and finally understood the rat's nest of wires crammed in...
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    Replacing Horstmann 425 with Hive (again)...

    Time to put this thread to bed. Having got the lady moved into her new house, the dreaded pandemic meant no more work on this system until the restrictions were lifted. I have since stripped out the rat's nest behind the original, defective Horstmann and replaced it with a separate patress box...
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    Moving home, moving Hive...

    Just to update this thread a little... The house move eventually happened a couple of weeks ago (only took 8 months and 3 days) and so far the Hive system is working perfectly for things like intelligent light bulbs and switchable sockets. BG even kindly sent an e-mail saying that one of the...
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    Replacing Horstmann 425 with Hive (again)...

    Thanks for all of that and it makes sense. The interlock in the Horstmann is definitely not set, both plastic screw heads are/were vertical. I say 'were' because that is where the HW was set when she moved into the house but the CH screw head was most definitely angled slightly over...
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    Replacing Horstmann 425 with Hive (again)...

    To answer your last question first, no it is NOT set to gravity with the switches interlinked. As for the Hive, no it can't but before that goes in I will have sorted the wiring to give 'normal' connections to all 4 (OK, 3) switching terminals. You also mention DIP switches. There is nothing in...
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    Replacing Horstmann 425 with Hive (again)...

    Hi Stem and thanks for the rapid and detailed reply. I understand the Hive replacement as I have one I installed on my oil boiler and the one I will be installing in the friend's new place was originally installed by me in her old home. Also, I have read the original thread on the Horstman and...
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    Replacing Horstmann 425 with Hive (again)...

    ...but just not yet. I have another thread running all about whether my Hive system will work when I take the whole shebang to a new address. So, that house move has now happened (it's a friend moving house, not me) and this is where my problems start. The 'new' house has a Worcester Greenstar...
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    Moving home, moving Hive...

    Well, what a to-do! The prospective buyer threw a hissy fit and withdrew her offer on Monday when she discovered the office 'furniture' and the bedroom 'furniture', (all free standing, although screwed to the wall for safety's sake) are not included in the sale. What, she wants my knicker...
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    Moving home, moving Hive...

    big-all. Good point. Solicitor says it is like light fittings and mains sockets with charger outlets, as long as you leave 'a' light fitting and 'a' socket, it doesn't have to be the same as the one they saw when they viewed. It's the function that matters, not the form. And the Hub belongs to...
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    Moving home, moving Hive...

    I still have the 2 year-old 'new' thermostat that I took off when I fitted the Hive, along with the original programmer, so they'll be going back on. And, when I fitted the Hive I also cleaned up the rat's nest of wires and chocolate block in the hole in the wall behind the programmer and...
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    Moving home, moving Hive...

    Exactly what I thought. Thank you for the explanation and the time taken to give it and also for the useful link to the factory reset. Hopefully that is the one bit I won't need in this exercise. Once the move is complete (assuming it all goes ahead as planned) I shall report back on the...
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    Moving home, moving Hive...

    And so you see my confusion... The Hive system (as far as central heating is concerned) consists of a Thermostat (which replaces the conventional thermostat and timer portion of the conventional programmer) and a Receiver (which replaces the boiler and valve activation portion of the...
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    Moving home, moving Hive...

    Thanks for that. Can I ask if this is based on personal experience. My concern is that, being the money-grabbing so-and-so's that they are, they will have some secret, computer-based reason why they can't (or rather won't) simply update the details. Brian
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    Moving home, moving Hive...

    I can't be the first to ask this question but I can't find the answer in here, or anywhere else come to that. I self-fitted my Hive system about a year ago and then decided to move home, the way you do. So far so simple. So, having kept the old thermostat and programmer it is but the work of...
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    Drayton MA1 not returning under spring pressure, but...

    Hi oilhead. At the moment, there is nothing wrong with the system, thank goodness. It was a case of putting two and two together and coming up with five. The water was very cool when I showered and so I advanced the timer to heat it up. The boiler was working fine as I had the heating on at the...
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