As an installer i can assure you there is no training on weather compensation, its correct application and the multitude of parameters anywhere. Those that use it on boilers are all self taught my self included.

One only has to read an instruction manual to appreciate why people prefer not to commission weather comp on heat pumps or boilers.

and technical help on settings is woeful too..

there are many reasons for this. But you need to know that regs allow not to use weather comp and until that changes vendors of heat pumps and boilers will only really support what's easy for most people to understand. so dont blame the installer... your field of work is both better managed, better supported and better nurtured than anything to do with heating

and yes its bad, really bad.

@alec-morrow when I ticked 'like' there I wished there was a 'despair' button !

Posted by: @alec-morrow

As an installer i can assure you there is no training on weather compensation, its correct application and the multitude of parameters anywhere. Those that use it on boilers are all self taught my self included.

 

One only has to read an instruction manual to appreciate why people prefer not to commission weather comp on heat pumps or boilers.

 

and technical help on settings is woeful too..

 

there are many reasons for this. But you need to know that regs allow not to use weather comp and until that changes vendors of heat pumps and boilers will only really support what's easy for most people to understand. so dont blame the installer... your field of work is both better managed, better supported and better nurtured than anything to do with heating

 

and yes its bad, really bad.

Hi Alec,

I don't disagree that it would appear that the training within the heating industry leaves a great deal to be desired, but in this particular instance it would seems that the system has been deliberately changed from the default settings to ones that are much worse.

When I commenced my career many years ago at a brand new 2000MW power station, there were literally thousands of engineering drawings covering all aspects of the plant and machinery, but in a box at the bottom of each drawing were the words 'If in doubt, ask'. Unfortunately it would appear that those few simple words are no longer used very often in our modern society.

From what I gather, MCS accreditation is a joke, that probably adds £2k to the costs of a heat pump installations, without giving any form of assurance to the unsuspecting customer.

Maybe someone should suggest that they shoot an installer each day, until they get it right. 

yes a lot of more engaged installers are  is in despair. Over the years there have been efforts to engage manufacturers and update training. it meets the same old brick wall.

The problem is essentially that as everything is designed outside the U.k. the intellectual capital doesn’t flow. The importers here advise the government and don’t want the business model to change as they sell more is their equipment is poorly installed..

@derek-m we do ask and nothing happens. Genuinely whilst are regulatory standards are not in line with the manufacturing countries, nothing will change. Germans in particular have never been up to lecturing us.

if you google Ecotechnicians you will find some installers. the present chaos around heat pumps was entirely predicted by us yrs ago, we even sat with govt to advise, but it came to nothing 

Posted by: @alec-morrow

@derek-m we do ask and nothing happens. Genuinely whilst are regulatory standards are not in line with the manufacturing countries, nothing will change. Germans in particular have never been up to lecturing us.

 

if you google Ecotechnicians you will find some installers. the present chaos around heat pumps was entirely predicted by us yrs ago, we even sat with govt to advise, but it came to nothing 

Hi Alec,

I'm afraid the situation in not unique to the heating industry, over recent years working on many large industrial projects I have had to teach some of the young Engineers the basic laws of Physics. Rather than just teaching students how pass exams, the education system should be concentrating more on ensuring that the trainees and students have the necessary knowledge and skills for the real world.

Weather compensation is not a difficult concept to understand, there are literally only 4 parameters that need to be set, and in most cases a reasonable estimate can be made as a starting point.

I do agree that some of the manufacturers instruction manuals could be made much easier to understand, since some appear to be a poor translation.

@derek-m the difference is of course what happens in your industry stays in your industry, but what happens in the heating industry leaves a wake of unhappy end users and disinterested installers…an un- virtuous circle if you like 

people also don’t realise to get a review in “which” magazine manufacturers pay £000s of pounds.. they the get to say what gets reviewed or not

It's very interesting to read this - particularly about the manuals. Maybe a gap in the market to produce one for Daikin. The best info for actually putting the WD curve into my controller that I've found is a series of YouTube videos, after trawling through a lot of irrelevant stuff first. Plus of course reading your advice here about the actual values of those magic 4 variables. It really shouldn't be that hard!

Hi All,

I thought my unit was in weather compensation mode, but was in fact in fixed temperature mode (at 55c, getting about 3.65 cop for life of unit since October 2021). I had recently turned the fixed temp down to 50c from 55c and saw it move to 3.9 cop daily with this change and was fairly happy with this.

However, have now found out how to turn this off and change to weather compensation. It is much, much slower at bringing the house up to temperature, I assume I need to tweak the length of time it is on for? 

E.g. before, it would come on at 7am, be off by 12-2pm on most days, maybe come back on at 5pm before going off again at 7pm for the night (I ran the cycle for 12 hours)

Now I think it could be on much longer, but I assume it would be using less energy? How do others run their units with weather compensation? Should I run it for say 5am to 9pm? We aren't keen on really hot bedroom etc, so maybe turn the TRV down in those rooms?

Oh also could someone post their flow temps for the following temps with their weather compensation on?

10c

5c

0c

-5c

-10c

@hr_3 I've altered my schedule to be 21 deg all night and day, so it never switches off.

With the curve as it currently set those temps are approx +10:33  +5:35.5   0:42   -5:45   -10:45 

I have the LWT max at 45

Weather compensation works optimally with an indoor sensor..which is almost always in the heat pump unit. Is this in a habitable room?

On off Controls don’t compliment weather compensation. So set them on maximum.

thanks Alec and hpn for the info,

The heat pump unit, well I have a number of units but I am guessing the main controller is what you speak of? I have a wall thermostat or wpm which is in the hallway upstairs / the main controller unit is in the loft

here is pdf of what I have

STIEBEL-ELTRON.CO.UK "https://www.stiebel-eltron.co.uk/en/products-solutions/renewables/controller_energymanagement/wpm_system/fet/technical-data.product.pdf"

it seems to be a thermostat/ controller unit?

pg. 13 of below is in English

https://www.stiebel-eltron.co.uk/content/dam/ste/cdbassets/current/bedienungs-_u_installationsanleitungen/FET__e1064f33-a10e-4db2-ad4a-8c8b54b588f1.pdf

Alec - are you saying it is better I do not use wc