- Thread starter robgil
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Cubist
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- Shropshire/Herefordshire Border
Hi Rob(?),
It's a common grumble with most Direct Hot Water systems, of all kinds, hot water is produced by pumping cold water through a heat exchanger in the boiler. Given the water flow rate the heat exchanger has to be powerful and typically this results in temperatures not seen with ordinary stored hat water systems.
I am not overly familiar with Rayburns but most modern systems should allow you to set a maximum required temperature. If you do not have the manual, or if the control panel provides no clues, you may be able to get the information you need from the web or by simply speaking to a dealer/maintenance outfit locally.
Cheers,
Cubist
It's a common grumble with most Direct Hot Water systems, of all kinds, hot water is produced by pumping cold water through a heat exchanger in the boiler. Given the water flow rate the heat exchanger has to be powerful and typically this results in temperatures not seen with ordinary stored hat water systems.
I am not overly familiar with Rayburns but most modern systems should allow you to set a maximum required temperature. If you do not have the manual, or if the control panel provides no clues, you may be able to get the information you need from the web or by simply speaking to a dealer/maintenance outfit locally.
Cheers,
Cubist
The only thing on the Rayburn is the boiler control, either this isn't working or the system is calling for heat without being regulated, its an unvented system so having it so hot isn't the best idea, the stat on the tank could well be bust as it does nothing.
Flyfisher
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- Norfolk, UK
Hi robgil. I can't help with your hot water problem but just thought I'd pop up to say welcome back to the forum. It's a fair few years since you were last in there here parts, hope all is well with you and yours.
Abi Cott
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- West Yorkshire
I've no idea what the solution is but I'd give the system a good going over. My sister had hot water flood through her bedroom ceiling due to a similar system that had been bodged by the previous owner because they had a similar issue.
Fortunately she wasn't in bed at the time or the results would probably have been fatal rather than just very messy and inconvenient.
Fortunately she wasn't in bed at the time or the results would probably have been fatal rather than just very messy and inconvenient.
Cubist
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- Shropshire/Herefordshire Border
Hi Rob,
With DHW systems the old hot water tank is redundant and should not even be in the hot water circuit any more.
The real problem here is the water temperature as it leave the internal heat exchanger. If there are no controls available on the panel to reduce this then the only option is to speak to a Rayburn engineer to find out if theres an internal mechanism to do this.
Cheers,
Cubist
With DHW systems the old hot water tank is redundant and should not even be in the hot water circuit any more.
The real problem here is the water temperature as it leave the internal heat exchanger. If there are no controls available on the panel to reduce this then the only option is to speak to a Rayburn engineer to find out if theres an internal mechanism to do this.
Cheers,
Cubist