26Chapter 3 Initial installation3.1 Selecting a system diagram - HPM toolHPM tool is a web-based software accessible via the address www.hpmtool.eu byusing a standard Internet browserHPM tool permits quick and easy selection of the right system diagram for yourheating system.Fig. 3.1: Selection of the heat producer – heat pump(s)It is necessary to select the corresponding modules for the main parts of the system(heat producer – heat pump(s), domestic hot water, heating circuit 1+2). The selectedmodules are combined into a system diagram. HPM tool then generates a systemdiagram number, which has to be entered into the HPM during the startup phase.
