Worcester boiler central heating temp

inkydolphin

My Worcester Greenstar Junior boiler has a dial for the central heating temp going from 0 to 7. The heating temp range is 40 to 82 degrees according to the instructions. If I want a temp of about 60 degrees would that be 3.5 on the dial or is it not that simple? Any help appreciated!

JSHarris

Best bet would be to try and measure the radiator temperature.  Simplest way to do that is with an IR thermometer.  These are pretty cheap and I've found one to be extremely useful.  I have one that cost about a tenner and is still going strong after several years.  Just point it at a radiator or close to the flow pipe from the boiler and adjust the control to see what temperature you get.

inkydolphin

JSHarris said:

Best bet would be to try and measure the radiator temperature.  Simplest way to do that is with an IR thermometer.  These are pretty cheap and I've found one to be extremely useful.  I have one that cost about a tenner and is still going strong after several years.  Just point it at a radiator or close to the flow pipe from the boiler and adjust the control to see what temperature you get.

Fantastic tip - thanks. Soon I shall know the temperature of everything in the entire house!

JSHarris

inkydolphin said:

JSHarris said:

Best bet would be to try and measure the radiator temperature.  Simplest way to do that is with an IR thermometer.  These are pretty cheap and I've found one to be extremely useful.  I have one that cost about a tenner and is still going strong after several years.  Just point it at a radiator or close to the flow pipe from the boiler and adjust the control to see what temperature you get.

Fantastic tip - thanks. Soon I shall know the temperature of everything in the entire house!

Mine sits on the dining room table and regularly gets picked up to measure things.  It got loads of use when the plague was rampant, as a quick check to see if either of us was running a high temperature.  Only thing to watch with them is that they give a crazy reading if pointed at anything shiny, like glass, a mirror or polished metal (like a chrome towel rail) as they are calibrated to give an accurate reading from surfaces that aren't very reflective.

lohr500

Or buy a clip on pipe thermometer which in my experience will be more accurate than an IR hand held thermometer. Brannan are a reputable brand and can be bought for not much more than £10. I have two. One on the flow pipe from the boiler and one on the return. Easy to then check and adjust the flow and return temps.

inkydolphin

lohr500 said:

Or buy a clip on pipe thermometer which in my experience will be more accurate than an IR hand held thermometer. Brannan are a reputable brand and can be bought for not much more than £10. I have two. One on the flow pipe from the boiler and one on the return. Easy to then check and adjust the flow and return temps.

I'll probably get both as the IR thermometer will be useful for other things too. Can also test the accuracy which will be interesting.

FreeBear

inkydolphin said:

My Worcester Greenstar Junior boiler has a dial for the central heating temp going from 0 to 7. The heating temp range is 40 to 82 degrees according to the instructions. If I want a temp of about 60 degrees would that be 3.5 on the dial or is it not that simple? Any help appreciated!

From the user manual - https://www.worcester-bosch.co.uk/professional/support/literature/greenstar-i-junior-combi-operating-instructions

Min - 40°C

  1  -  47°C

  2  -  53°C

  3  -  61°C

  4  -  68°C

  5  -  74°C

  6  -  80°C

Max - 82°C

So for a 60°C flow temperature, set the dial to 3.

gazb_2

We have the same boiler. What number would you recommend for a bungalow with 9” solid walls with radiators? Thanks 

inkydolphin

FreeBear said:

inkydolphin said:

My Worcester Greenstar Junior boiler has a dial for the central heating temp going from 0 to 7. The heating temp range is 40 to 82 degrees according to the instructions. If I want a temp of about 60 degrees would that be 3.5 on the dial or is it not that simple? Any help appreciated!

From the user manual - https://www.worcester-bosch.co.uk/professional/support/literature/greenstar-i-junior-combi-operating-instructions

Min - 40°C

  1  -  47°C

  2  -  53°C

  3  -  61°C

  4  -  68°C

  5  -  74°C

  6  -  80°C

Max - 82°C

So for a 60°C flow temperature, set the dial to 3.

Oh wow so it turns out the photocopied manual I was left with is missing this bit of crucial information. Thanks so much for posting the link!

QrizB

gazb_2 said:

We have the same boiler. What number would you recommend for a bungalow with 9” solid walls with radiators? Thanks 

As low as is comfortable.

This will involve choosing a lower number when the weather is warm, and a higher one when it's cold.

It's a manual method of weather compensation.

Ectophile

gazb_2 said:

We have the same boiler. What number would you recommend for a bungalow with 9” solid walls with radiators? Thanks 

As low as you can get away with. Modern boilers are more efficient at lower temperatures.

But if the house never gets up to temperature, then it's too low.