Kensa Compact heat pumps have inbuilt water pumps for both the ground and the heating distribution circuits. The water pump for the heating distribution circuit is sufficient to provide enough flow and pressure for the radiator distribution systems. Additional pumps should not be required.

In existing properties any microbore pipe should be removed due to the flow restriction and high pressure drops.

When operated with radiators to avoid short circulating problems, one bypass radiator should be left ‘open’, i.e. any TRV is removed. This radiator can be positioned in areas such as halls or bathrooms.

It is important that the heat pump has been specified as operating on radiators, as a higher outlet temperature will be required and a ‘smart start’ is necessary to limit any electrical disturbances caused by the compressor starting.

Kensa would always recommend fitting an expansion vessel on the heating distribution circuit.

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