Method for heating a room with a heat pump, has two circulation pumps one of which feeds the boiler at a lower rate than the room circulation pump

摘要

The boiler (4) is supplied with water by a first pump (5) in parallel with a back pressure valve (6) as a second pump (3) circulates water through the heat exchanger circuit (2). When the boiler thermostat closes the first pump the second pump operates at the full rate.