Recent content by Hamedhbb

do you mean a thermostat that uses opentherm or normal stat with timer function? Thanks. I totally agree thermostat is needed because I have 2 zones and pump needs some rest. I am trying to see which way would be more efficient. I tried the above last night and distribution of heat was way more...

To bypass thermostat and let the boiler control the CH. I set the temperature at the boiler and it’s 22. It’s for a test.

Even there they call it timer. I am trying to check the difference. I set then thermostat to 27 when I need heat and 10 when I don’t. The rest is done at the knob. Want to see the difference to when I set the knob to max and set the thermostat at 22. So far I have seen an advantage. When knob...

I appreciate your expertise and that’s why I am here. I have no idea about the regulations. What I explained is based on readings I have done recently, some tests that I will share once it’s done and a bit of my engineering background. for this particular one, I got it from following document...

Yes I check the heat output rating of the column radiator against the existing one and they were identical. The radiator had flow and return inlets marked and followed that. My has PVC pipes with push fit fittings and it’s very easy to switch them. The radiator is warm as normal now after...

On older states, they have larger diameter copper pipes and different type of rads perhaps storage tank, etc. In new estates they have small diameter pvc pipes and houses are generally smaller and are better insulated. for individual rooms you use a TRV but the temperature in warmest room can...

I guess a smaller portion of installations are using this type of boiler and it is more of a belt and braces. If anything goes wrong with the system, it prevents running the boiler all the time. I meant room thermostat is not necessary to control room temperature in this type of boiler.

The alternative solution I can think of for this is to down size the radiator in that room or move the thermostat to other side of the same room. I have another solution explained below to eliminate both thermostats and use digital TRVs. It’s going to be long but might give someone in my...

Yes, flow and return were labelled when arrived and I used them. the radiator temperature is fixed. it's just to get it working as a condenser boiler which is concerning me.

That is very true! The system was not balanced properly when we moved in. all lockshield were fully open. the ABV was making a funny noise. we called the installer back and within 2 mins, he turned the ABV dial and left. which can have an impact on a balanced system. since then the heating...

That's right plus I am sure there is one auto bypass inside the boiler. the external one is just in case both zone valves are closed and to protect the internal one I guess. The problem is user manual does not say anything special. not even pump head vs flow. I can see on utube a new version...

reading the balancing procedure for the boiler, it says to set the "programmer" to On for balancing and return it to "Normal". I assumed it is the room thermostat but reading it again, it is not. it doesn't mention in the manual what is the programmer. is it something connected through opentherm...

I am not home now, this is the new rad: https://www.bathroommountain.co.uk/marseille-white-single-vertical-mirror-radiator-1800x260mm-31167?parent=V3081 this is the set on rads with TRV...

They are bidirectional according to the arrows on the TRV. I switched them anyway only because it took ages for lockshield changes to take effect. My problem is that there is too much flow. I can easily get the furthest radiator to 70'C by restricting the other one. my problem is to have them...

Thank you. The column radiator was slow to warm up and it is sorted when I tried to balance. but still the difference between flow and return just next to combi boiler is small.