Thanks all for replies. I have been sieving through (https://www.gov.uk/government/publications/sanitation-hot-water-safety-and-water-efficiency-approved-document-g) provided above (thanks L") to get some clarification on the UK regulations.
In a nutshell a temp control is only required on a...
Thank you for your reply. That document and other documents say that is it "best practice" to fit them in hotels on baths, showers and basins but it is not a requirement under regulations.
It also says "Guidance to the Water Regulations (G18.5)". I have been searching for a download of this...
Hello,
Is it a requirement to install thermostatic mixing valves on appliances (e.g. baths, showers, taps) in hotels in the UK?
If so, does it have to be a certain type? e.g TMV3
Thanks in advance,
I agree that the PRVs in the risers seem to adding undue resistance to the circulation system…
The idea was to have PRVs, set at 5 bar, positioned on the boosted cold water inlet to the calorifiers. This protects the calorifers. Then I would have just under 5 bar of pressure in my main leg of...
Thank you,
I have done some further investigations...
When the PRV is on lower settings (eg 3bar) and the hot tap is turned on, the water is choosing to travel up the return pipe rather than the flow.
When the PRV is fully opened (5bar), the circulation flows in the correct direction ie the...
Thank you for your responses.
Sorry if I was not being clear: the PRVs are positioned on the domestic flows (HWS-F) at the bottom of each risers. An example of the PRV in question is circled in the drawing below:
Hello,
About the system...
I am working in a large hotel and we are installing new domestic pipework to all bathrooms. The domestic hot water is constantly returned back to the boiler using a pump on the return in order to allow constant circulation of hot water.
The problem...
Each riser in...
Thank you for your responses. The system is existing but we have replaced the chiller...
I suppose the starting point is to measure the existing percentage of glycol in the system then I can calculate how much extra needs to be added... can you recommend a cheap glycol refractometer?
Hello,
Is there a rule of thumb for calculating the amount of Glycol required in a chiller system?
I know that the proper way is to calculate the volume of the system. A lot of the pipework sizes are unknown so this is not possible.
The hotel has 100 fan coil units and is powered by a...
Hello,
I am currently working on a large hotel…
What is the correct way of setting the flow rate on double regulating valves (DRV) on the return legs of domestic hot water pipework?
The image (click link above) shows the location of each DRV – There is one on the return of each room and...
