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Strange hike in Boiler Temperature

December 6, 2016, 6:45 am
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Yesterday, I was stood next to the boiler in garage and noticed the flow temperature display showing a rising temp from the normal maximum of 72C going up to around 85C. The boiler BDR91 was off and I couldn't hear the pump running but as I was in the middle of fitting replacement downlights, I chose to leave it.

The temp did start to drop back and I think it will have dropped into the boiler gradient limitation routine and fired burner back on when demand was required.

My puzzle and question is - How can the flow temperature show 85C when I have the boiler heat control set at circa 72C.
Surely, if maximum heat out is 72C, there can be no part of the CH system with water hotter than that? [Ignoring slight variation in temps at control]

[By way of added note - around the same time of the day I spotted that the hall zone temp on the Evo controller was displaying 5C which implied either it had reset that zone to off (5C frost protection) or it thought a door/window had opened and temporarily set the xone to 5C. I wondered if the two events were connected.

Confused

As a PS - A week ago I changed pump speed down from high (III) to medium (II) as recommended by DBMandrake in a previous thread.
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Loxone speaker backbox

December 7, 2016, 3:05 am
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For Sale

Loxone Speaker backbox, we had ordered these in for a job but are no longer required.

RRP £45 from loxone, We can offer for £30 each

We have 15 available

Please contact for further details
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First project: remotely programmable timer?

December 7, 2016, 6:30 am
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Hi,

I have an existing programmable timer switch (something like http://www.screwfix.com/p/greenbrook...tch-230v/7643G, only much more horrible). Mine has tiny switches, an incomprehensible manual, and the whole thing is in a hard to get to location, so it's comically hard to program, not to mention it periodically seems to forget/change the program!

Sooooo, I thought, how about replacing it with something that I can program through a nice shiny interface on my phone/iPad/laptop. But I can't seem to find such a device on the internet. Any ideas? I don't mind investing in some infrastructure beyond a single switch, as I want to move onto other projects eventually, but it does need to be wireless as rewiring this part of the house isn't practical.

Thanks in advance for suggestions

- Dave
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So why not EnOcean

December 10, 2016, 4:29 am
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Hello,

I've been wondering why the EnOcean protocol and the associated range of energy harvesting sensors & receivers hasn't yet gotten any traction in the marketplace, particularly in the UK.

I'm not an automation guru by any stretch of the imagination but the EnOcean protocol offers data communication at such a low bandwidth that their devices can run completely wire and battery free. Given their release of the energy harvesting technology to work in a BLE & Zigbee environment I can only think they are well placed to dominate the market for low bandwidth sensors, receivers and actuators.

Granted their chipsets are more expensive than other protocols but in today's world surely developing devices that inherently require batteries goes against the grain of looking after our environment particularly when the growth of connected devices is only going to gather pace.

I'd be interested in hearing your thoughts on why there are a plethora of Z-wave, Zigbee, WiFi, etc devices but few and far between EnOcean devices.

Thanks
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Evohome over shoot on UFH zone

December 12, 2016, 1:53 am
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I've had evohome installed for around 10 days now. For the most part it is working fine except for the Kitchen which is the only room in the house that has UFH. This zone is has a T87RF wireless stat and a BDR91 configured as a boiler relay driving a two port zone valve. It is configured to have a temperature of 20.5 in the morning and evening and sets back to 18.0 during the day and over night. The system has optimized start/stop enabled.

When it was first installed, we were in the middle of the cold spell and the zone temperature was managed well with very little over shoot (it was typically maintaining the temperature around 21.0). Then on Friday the temperatures warmed up and the zone is now over shooting to around 23.5 every day. Overnight the zone is dropping to around 20.0 so it doesn't need much energy to raise the temperature to 20.5.

Is this just a case of the system needing to learn, or do I need to do anything to stop this behavior?

Don
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Adjusting Zone Temp when Optimum Stop is Enabled

December 12, 2016, 2:20 am
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A first for me. We have a visitor coming, so I decided to adjust the temperature profile for one of my zones. The Optimum Stop icon was enabled. After confirming the revised schedule, nothing happened. The revised schedule was showing on the controller but the zone was stuck in Optimum Stop. I guess that it would have stayed there until the next check point was reached. I cleared the problem by turning off Optimum Stop and turning it back on again.
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Sony Vaio XL1B2 200 disc DVD Changer | PC connect | Batch Ripping | Blu-Ray hackable

December 12, 2016, 4:41 am
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Hi Folks,

It's been a while since I've posted on here! I'm not automating as much these days and so sadly to free up some space, I am selling my multi DVD changer.

For sale : Sony Vaio XL1B2 200 DVD Changer

Full pics here : http://www.twisted-pixel.co.uk/Photography/DVD-Vaio/

This is a 200 disk CD and DVD changer and recorder. This is a US import and COMES WITH the UK 120-> 240V transformer, manuals , installation disk and all cables to get this running.

Note : This will not ordinarily play back to your TV. Apart from the power supply, it's sole connection is via a Firewire IEEE1394 port to your PC.

This was built especially for Windows Media Centre and allows your Videos view to show a catalogue of all of this disks in the Vaio carousel, ready for playback.

For those of you in the know, there are many Linux and Windows automation scripts out there for integration to your needs. This includes mass ripping of disks to maintain readily playable copies of your favourite audio and DVDs. I have used this device to spend many a night to back up my full set of DVDs.

Please note that this is a noisy device but tends to get quieter with time. Also though it will sit well with existing 19" equipment, please note that it is quite deep. Full specs are a google away.

There is abit of an underground community still wanting to revive this player as it is unique in supporting a PC based connection. Aside from mass ripping scripts, there are some users whom have converted this to support BluRay Read / Write.

Cosmetically, this has a few light scratches and marks, but from afar you will not notice them. Functionally, it works spot on and I have tested this against Windows 7 Media Centre.

Comes complete with Manual, Installation disk, Firewire Cables and Full US-> UK transformer.

Seeking £150 .. Collection only, I'm afraid due to size and weight. I live in Gerrards Cross, just off the A40 in South Bucks.

This is being listed elsewhere so please get in contact sooner rather than later.
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Domoticz and HGI80 show two zones with oscillating temperatures

December 12, 2016, 5:00 am
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I have 12 zones and the temperature data is recorded via an HGI80 to Domoticz. I also have a script running every 5 mins to log the temperatures to emoncms.org using the internet gateway temperatures.

What I see are two zones that seem to record quite weird oscillating temperatures instead of a nice smooth line. All the other zones are fine. The script that uses the internet gateway data, doesn't show these spikes.

Any clues what might be causing this?

chart (1).jpg
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Preparing for the party season - keeping the heat on

December 13, 2016, 1:34 pm
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With Christmas and New Year parties looming and my Evohome system being only 3-months old and I have still to pick up all the hints and tips, I was wondering how to keep the heat on (all zones) until say 03:00 in the morning?

I could produce a custom schedule and laboriously go through each zone in-turn selecting my needs, but all I want to do is keep the heat on for a few more hours and then go off and revert to normal a few hours later, but there seems to be no obvious way of doing it, there are plenty of options to turn heat down, turn it off, go on holiday but not the converse, I look forward to an option that enables the Eco Mode to be programmed (in reverse) to do this - don't the Germans have parties :)
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Image file for Domoticz running on a Pi with HGI80 drivers installed

December 14, 2016, 12:03 pm
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Just in the process of creating the image file for this.

It's:
- Dev build of Domoticz, release version (i.e. you can make changes to the source and recompile on the Pi)
- HGI80 drivers added
- The web server runs on port 8080
- It uses DHCP to pick up an IP address (I assume people will want a fixed IP, but as we all have different RFC 1918 ranges - 192.168.*, 10.10.* or whatever I think it's easiest for most people to bind the IP address via their router).
- SSH enabled
- As released it has the standard password for the pi login, but you should probably change that.

Can anyone think of anything I need to add before I make copies of this available? I'm probably going to share it via Dropbox, and only for a few days. I just think it might help some people.

Oh, and hand up who's interested...

P.
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Cannot create Honeywell account

December 15, 2016, 3:28 am
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Question on T87RF2033

December 15, 2016, 9:18 am
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Hi,

Quick question on thermostat in subject. I've got it configured as a thermal sensor for my bedroom and occasionally observing an interesting behavior. I have one more regular thermometer in exactly the same spot and time to time I see almost 1C difference in measurements. Is it a normal behavior and Honeywell thermostat is just slow or it has to be replaced?

Any chance that others such as HCW82 will be picking up changes in temperature faster than the round one?

Thanks!
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Amazon & Lyric T6 Live

December 16, 2016, 10:20 am
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Amazon just published the Honeywell Lyric T6 skill. Have fun.
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Radiators heat up when closed evohome hr92

December 17, 2016, 3:49 am
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I Have just installed the Evohome system with 4 hr92s. As I'm new to this it has been a struggle to say the least as my existing valves needed 2 types of adaptors . 2 from the Hr92 supplied and 2 ACH m28 x 1.0 mm I had ordered.

the existing radiators in the bathroom required me to cut the pins slightly by 2mm and once done they worked fine plus I re seated the adaptor on to fully fit over the valve and when the are off and the lounge rads on they remain cool however, when I switch the lounge rads off and the bathrrom on the lounge rads still heat up. after research I did 2 things 1/ again I screws thye ACH28 adaptors I bought fully on as they were not fully seated plus the pins were very long so I cut them to much the advised length to 14mm from the valve front of thread and put back the HR92 one is a bit cooler that the other

I noticed on the ACH M28 x 1.0 mm there is a plastic pin etc. if I put this pin on they there is no way I can get the adaptor on etc.

the pin moves a stroke of around 2mm etc. If move freely but wit a bit of force need and retracts no problem

can anyone advise me

many thanks

Jaxx
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Pump switches off during heating

December 20, 2016, 1:04 am
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Hi, i have posted this question in a different thread i had started, but have a few more details about the ongoing issue.

Whenever there is a change in demand from a zone(s) and therefor the Opentherm bridge is requesting a different flow temp to the boiler, the boiler will shut down and switch off the pump for 40 seconds. after this it starts up fine and will carry on untill the next event.

its almost as if the Viesmann boiler doesnt what to do when i new flow temp is requested and therefore stuts down and starts again.

Thanks
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Slow Internet Connection

December 20, 2016, 10:01 pm
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A friend of mine has recently installed the Honeywell/Evohome security system. He does not have Evohome for his heating. Asking him about he is very pleased with the system itself but described the App as slow, not always connecting quickly to the Internet and sometimes returning a no connection message despite there being no problems with other devices in his home. The same symtpoms I often have, mainly since the last upgrade to the App. Anybody else suffering similar? I can be at home and the App tells me there is no connection when clearly there is and the Panel says there is a strong connection to the router. Away from home it seems to be harder to connect to my system than it was before. It is not something that is there everyday but I'd say crops up two or three times a week resulting in repeated tries to connect including exiting the app and going back in. My friend seems to be experiencing exactly the same. Hence I wonder what others are experiencing.
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Confused about Evohome local override

December 21, 2016, 12:45 am
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For some reason I'm not able to change a set point by turning a dial on the HR92s or Y87RF. Most of the times that is. When turning the dial on the Y87RF for which I explicitly disallowed local override and back on again the display shows me '--,-'. Sometimes all of a sudden I can change the numbers though. Anyone have any clue what could be going on? Could this be an RF communication issue?
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Replacing a System Boiler on an Evohome'd 'S' Plan System

December 21, 2016, 3:40 am
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Rather than hijack someone else's thread, I thought that I would update you on my discussion with a Viessmann installer about a new boiler. He was a very pleasant chap, and one that I would probably trust to do the work. He has also installed Evohome in his own home. So far so good.

I had provided him with what I thought was a pretty detailed set of requirements which included an Opentherm connection to the boiler; fitting of an ABV to replace a gated bypass; fitting of a SpiroTech MB2 and RV2 plus associated works. I also asked for HW priority.

After looking around my system, the response was ' all you need is a new boiler with magna clean' and I would leave all the existing Evohome controls and the 2 motorised valves in place to avoid all un-necessary work.

If I wanted a KISS approach, then I wouldn't have purchased Evohome. ( I didn't tell him that)

I have another Viessmann installer coming in the New Year.
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OpenTherm scheduling to get rooms upto the required temp on time

December 22, 2016, 1:35 am
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Quick question: If you have the schedule set to be 21C by 1800 then the optimisation comes on in as it should but always by 1800 the room temp is only at 20C and seems to hover there all evening maybe getting to 21C - 3 or so hours later. Increasing the max flow temp allowed on the boiler seems to make no difference as the boiler still modulates down to the same flow temp 1C off the set temp. This seems to be because the OpenTherm reduces the flow temp at 20C assuming that there is still enough heat being put into the house to raise it to 21C. So now I have set it to be 22C by 1800 so that it wont start reducing down until the room temp is up to 21C which is usually by about 1800. Then an hour later at 1900 I then set a schedule period to be 21C for the rest of the evening, this then seems to be the best match for modulation and control of room temp.

Does anyone else follow this practice or similar?
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Android app

December 23, 2016, 3:50 pm
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I've swapped phone and can't locate the Android app for Idratek (not the message board app). Please could someone point me to it?

Thanks

Alex
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