Combined heat pump and boiler circuit - has mixer valve coupled to heat pump return line and boiler feed line

摘要

The combined heat pump and boiler circuit for a central heating and hot water system includes a multi-way mixer valve (4). The return line (6) for the latter is coupled to the return line for the heat pump (1) and the feed line for the heat pump (1) and the feed line for the heat pump (1) is coupled to the return line for the boiler (2). The feed line of the boiler (2) is coupled to the feed line (7) of the mixer valve (4). The latter is also coupled to the feed and return lines for the radiators. The heat pump may be bridged by a bypass line incorporating a blocking valve (8) coupled to the return line (6) of the mixer valve (4). The circuit allows the heat pump to be used to supplement the gas or oil-fired heating system.