Intergas HRE combo boiler hot water

[David Sarbutts]

Hi, I am having trouble getting hot water. The boiler is a Intergas HRE and the water coming out is Luke warm.
I haven’t got a manual as I’ve not long moved in.
Any ideas please. Kind regards Dave

 

[sxturbo]

From intergas -

No hot water – combination boiler
If you have cold or lukewarm water coming from your tap, there could be a number of reasons:





The hot water tap may be too far open. Reduce the water flow until the temperature increases to a satisfactory level.


The boiler has been switched off; this is shown as a red dash (–) on the front of the boiler.


The hot water temperature on the boiler display may need to be increased. Press the temperature symbol twice so the green light is on the tap symbol, the hot water temperature is then shown in the display. Simply press the + button to increase the temperature (or the – button to decrease the temperature); once completed, press the reset button once so the letter P is displayed for a second.

 

[David Sarbutts]

Thank you Turbo, also on the display it shows 0.5. Does the pressure need increasing and if so how do I increase it?

 

[sxturbo]

Pressure should be 1bar but this is just for the heating circuit.

 

[sxturbo]

For the operating manual

https://www.intergasheating.co.uk/a...mpact-HRE-Operating-instructions-88288709.pdf

For the install manual

https://www.intergasheating.co.uk/a...-Compact-HRE-Installation-manual-88287806.pdf

 

[David Sarbutts]

Thank you Turbo and everyone. I’ve increased the pressure to 1.5 and hot water and heating in working order. You learn something everyday and no one said life was easy. Thanks again for your quick and informative response.
Kind regards Dave

 

[Deleted member 267285]

Pressure should be 1bar but this is just for the heating circuit.

Vast majority of combi boilers I know of need pressure for the boiler to deliver hot water as it’s the heating circuit that provides the heat to transfer via the plate heat exchanger

 

[Madrab]

Usually but the Intergas doesn't use a diverter valve nor the pump to send the heating circuit water through a separate plate HEX to heat the cold water up.

The IG's have a large single HEX and it has the copper mains water pipes (and the heating circuit pipes too)embedded into it, the flow switch detects the HW demand and fires up the burner, it heats the HEX and the embedded pipes, heating up the water. Very simple and effective design IMO

 

[Razor900]

Vast majority of combi boilers I know of need pressure for the boiler to deliver hot water as it’s the heating circuit that provides the heat to transfer via the plate heat exchanger

Depends on the age mate. If it’s an ERP boiler it will shut down the DHW output if low pressure is registered the earlier ones didn’t