Technical information
Vent 402 – 6721815546 (2021/03)
34
12.10 Symbols key
Table 24 Symbols according to ISO/FDIS 14617
Symbol Denomination Symbol Denomination Symbol Denomination
Shut-off valve Pressure sensor Pump
Non return valve, flow direction > Differential pressure switch Air vent (automatic)
Adjusting valve Accumulator tank Filter valve
Safety valve, outlet > Coil tank Domestic hot water
Control valve with motor, arrows
indicate regulating gates
Electrical boiler Inlet/Outlet
Thermal valve Oil-fired boiler Duct (arrow indicates flow direction)
Thermometer Heat pump Intersecting duct
Temperature sensor Expansion vessel T-branch
Pressure gauge Filter/Screen Differential pressure sensor
2-way regulating valve with motor Heat exchanger Flow guard
Electrical heater Double section DHW tank Double section DHW tank with
inbuilt electrical heater
Compressor / fan Manual deairer Radiator / district heating
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