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19
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Connecting a heater to a hot water distribution
Cold water shall be connected to
an inlet marked with a blue ring and writing “HSW INLET”. Hot water shall
be connected to an outlet marked with a red ring or writing “HSW OUTLET”. If the hot service water (HSW)
distribution is equipped with circulation circuit, it shall be connected to the outlet marked with
“CIRCULATION”. For potential drain of heater, the HSW inlet has to be provided with a “T” fixture with a
drain valve. Each individually lockable heater must be at the cold water inlet provided with a stop gate, test
cock, safety valve with a reverse flap and a pressure gauge.
An example of a group heater connection for steady hot water consumption from all tanks using
Tichelmanns´s method
HW –
heating water
HSW –
hot service water
CW –
cold water
1
–
Return valve
C -
circulation
2 -
pump
Figure 10
