Search results

LOL. That would be really annoying. Possibly you don't want to take the boiler apart to check this, but the symptoms would be that the heating *never* switches off unless you press the power button on the front or unplug it.

Usually wire a standard mains supply to the live/neutral/earth. Then you would remove the jumper between Ls and Lr, take Ls (and maybe Ns) for the live supply to your controller and return the switched live to Lr. Many electronic controllers will also require an internal link from the Ls...

If the controller isn't reliably sending to the boiler than you can press all the buttons you like and it won't make any difference. Try switching it on and off from very close and see if that works. Try changing the channel settings. My experience is that many fitters just leave them on the...

Doesn't the pump stay on anyway during anti-cycling?

A faster pump speed means the temperature drop/rise across the heat exchanger is smaller and the average water temperature in the circuit is higher. This will reduce cycling by the same amount as if you were running at a higher flow temperature, perhaps like 5C higher for a change from 2 to 3...

No, I just didn't read the manual ;) So, from that table, the time the burners are off for anti-cycling *is* driven by the d.2 setting but not directly? That setting is actually the anti-cycle time for a flow temperature of 21C, and then the boiler picks shorter intervals when the flower...

I have to admit I don't entirely understand how to control the Vaillant anti-cycling delay. In fact I don't think you can! What I think happens is that boiler calculates its own length of time for the burners to be off, based on various criteria, and the d.2 setting is simply the maximum...

It is normal. It is called cycling. Your boiler is (almost certainly) well over-sized compared to your heating needs so the boiler has to turn off occasionally to avoid overheating. Do the radiators stay warm while the boiler is turning on and off? Do they reach the temperature you have...

Remember, the answer to question 3 is "sorry, that isn't covered" ;)

d.2 is the minimum time that the boiler will wait after cycling off before cycling back on again. There is also a required minimum temperature drop. Once both the d.2 time and the temperature drop have been reached then the burners come back on if still required. Your numbers are way huge...

One of the more annoying things about wireless controllers! The Salus does this from time to time, but it can affect any wireless controller. If you get this more than once a blue moon, try changing the connection channel, check the batteries, or move out of that solid copper house :) Job...

Losing pressure, losing water. Losing pressure fast, losing a lot of water. Should be easy to find. Look for a random skinny pipe ending in thin air and squirting out hot water. For a more scientific approach: 1. Pressurise system to 1-1.5 bar. 2. Turn on heating. 3. Watch pressure...

I thought HIPs were gone but the EPC remained a requirement for selling your house? Must say that I haven't checked that. Just what I 'heard in the pub".

Plenty of people get them to work, but there is an awful low of crap written about how to do it so no wonder people get confused. Case in point, PrenticeBoyofDerry who either didn't read my instructions or doesn't know what he is talking about. Still, not the greatest piece of kit and I...

On the Salus, press and hold both the up and down buttons for about 3 seconds. The display will blank and the heating will be off. Not "off until a bit later", but off, forever, until you start pressing buttons again :)

You can fit directional exhausts on many flues but I'm not sure it would solve your problem. To get significant condensation forming on your wall the exhaust gases would have to be getting blown back onto the wall fairly consistently and no matter what direction you send them that would still...

Approximately 300kg of CO2 per day, 100kg of H2O, and very small amounts of other gases with correct combustion. Ignore the doomsayers. It makes little difference what the make and model of the boiler is. I've made assumptions about the temperature of the water and the efficiency of the...

The tails on a one-pipe system are not necessarily a good measure of the flow through the single pipe. The tails are fed primarily by convection of hot water at the inlet and colder water at the outlet, not by a pressure differential between the two tails (as with a two pipe system). If a...

As I have suggested before, it isn't this simple. You can calculate the difference between the flow and return temperatures by using the heat lost through the radiators and the flow rate. At a given temperature, this is constant and independent of the boiler power and so the temperature drop...

Building regs Part J (new as of 1st Oct 2010) have been explicitly modified to state that condensing boiler plumes that meet the building regulation requirements for flue termination location may still cause a statutory nuisance. They advise (section 3.23) that following the Guide to the...