December 2, 20241 yr Hi, what is the best setting to have your heat pump, post buffer tank circulating pump flow rate set to.
December 3, 20241 yr Aim for it to match the HP's internal circulating pump at max heat output so there is no net flow into or out of the buffer.
December 4, 20241 yr Author Hi, how do I measure the HP's internal circulating pump at max heat output so I can balance the two pumps, Thanks
December 4, 20241 yr If you tell us what make and model you have got someone may come along with more specific detail. If it has performance figures you can read from the display there may be a flow measurement you can see. If it is designed like many to have a delta T of 5 deg C then the flow rate will be approx 3 litres/min per kW of output and you can either read the output power out from the display or infer it from knowledge of the performance graphs and the flow temp and OAT. Even if you know this how will you measure the flow through the secondary pump? Why has your system got a buffer in the first place, they are best avoided unless required to solve a specific design problem?
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