The WPM heat pump manager controls the heating, cooling, and domestic hot water operation of the WPL heat pump. The HSBC 300 Integral houses the WPM controller internally, with the interface conveniently available in the face of the housing. A stand-alone WPM controller is needed if the WPL is installed in a system without the HSBC or if more than one WPL heat pump will be installed. The WPM prioritizes DHW heating and will automatically adjust to the heating circuits when required. The WPM is a highly programmable controller and comes pre-programmed with factory-set default parameters for quick initial start-up. Software updates are input with an SD card.