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Morning all :) I've got a pretty fancy (I think) unvented CH/DHW system powered by a 2001 Oil-fired HRM Wallstar 15/19 Boiler. I've asked some separate questions about it in another thread, but now, much more urgently, the thing has stopped firing up! Some key facts: - There is no room...

Cheers v much guys We're going to order the Pack 2, since I'd like a thermostat to keep a limit on rooms temps and save some economy. By the way - the boiler model is HRM Wallstar 15/19 with an EOGB Sterling 40 burner and Danfoss pump. As it happens, it packed up last night so I'm just about...

Tha ks very much for that, i'll give it a go. P.s I assume I leave the bypass valve alone?

Once again I thank you for your time. Regarding balancing - googling it, I just come up with a load of info on balancing radiators....rather than balancing DHW/CH, is this something I can DIY? The Sundial pack looks good, and the wife likes it. I'm happy with wiring so long as I don't need to...

Hi again, Stem - thanks very much for taking the time there - very much appreciated :) Here are some photo's now. There are two, 2-port motorised valves which are both working (I can hear them operating when I operate the control). Below is a photo of the layout, showing the bypass valve to...

Can anyone help? I just want to know if I can programme the DHW&CH independently with the a more modern unit, and that it'll fit the backplate. P.S - I can't find a thermostat anywhere in ym house....is this unusual? :D Tom

One of these.... https://www.google.co.uk/search?site=imghp&tbm=isch&source=hp&biw=2462&bih=1191&q=st699&oq=st699&gs_l=img.3..0j0i30k1j0i5i30k1j0i24k1l7.1268.2034.0.2164.5.5.0.0.0.0.135.509.0j4.4.0....0...1ac.1.64.img..1.4.501.aQs9-xKCCRg#tbm=isch&q=honeywell+st9400 Instead of one of these :)...

Whoops pics don't work.... Current programmer is a Honeywell ST699, I was thinking for upgrading to a ST9400... :)

Hello :D My Honeywell programme is one of these... I find it very annoying that it doesn't allow me to progamme the DWH and CH independently, i.e they both come on and turn off at the same time. I wouldn't be so bothered, expect that, when they are both one, the system seems to...

Ok im with you, thanks!

Hi again, Thanks v much for all the responses :) I just sat next to the cyl & EV while my wife operated the tap. It wasn't immediately obvious which the noise was coming from, but with one hand on each, I can certainly feel it coming from the EV, rather than the cyl. It was last 'serviced' in...

Sorry, I meant how can I confirm that its a pressure relief/cyl fault, rather than something like the inlet valve that the first poster mentioned?

Hi guys - cheers for the responses - Two quite different answers there, is there any way that I can give myself confidence it is/isn't the cyl pressure before spending £££ on calling someone out? Tom

Hi :D I had an unvenvted system. Its a 210litre high pressure cylinder in the loft with separate expansion vessel. The boiler is an OilStar oil-fuelled unit downstairs. The system provides DHW to four sinks in the house, and two showers. The pipework gives out quite a loud groan when we...

Finally had a qualified plumber round (took week to find someone who would actually turn up...the usual). Anyway - he put my own footpump on the expansion vessel and pumped it up. Sorted in 5 mins. Cost £42. If it goes flat again immediately i'll call them back to switch out the faulty...

OK guys, Cheers very much for the help. I learned a couple of things; 1) I'll need to get someone in to do this one 2) BernardGreen likes having a rant :D Will post back results for the benefit of future readers. If anyone is in the Norwich area and would like this job, PM me Tom

P.S! Actually - I'd read elsewhere that water would come out of the schrader is the rubber was split - It didn't, bone dry (h/w feed OFF). Could I check the rubber by turning the feed back ON and depressing the Schrader to see if water comes through? Tom

OK hello again :) Just had a look at the expansion vessel. With the H/W feed to cylinder OFF, and a hot faucet open - There is 0 PSI / 0 BAR pressure at the Schrader valve of the expansion vessel. I couldn't resist putting in a couple of pumps - The pressure begins to build for a moment but...

Hello guys thanks very much for all the responses, excuse me taking a week to post back again. Yes, you were right ref the Tundish showing the drip. Just to clarify - The tundish on the side of the hot unvented cylinder in the attic (as per orginal pic) reveals the drip which makes it's way to...