Hitachi YUTAKI S80 Serie Manual De Instalación Y Funcionamiento página 82

7.1.1 Space heating pipes connection
The unit is factory supplied with two shutdown valves which have to be connected to the water
inlet / outlet connections. With these shut-off valves it is very practical to connect the indoor
unit to the heating system by using the factory supplied gaskets just below the valves (G 1-1/4"
connection). Then, the space heating installation can be carried out.
7.1.2 Drain pipes connection
For a correct drainage, connect the drain pipe for the safety valve to the general draining system.

NOTE
• The safety valve is activated when water pressure reaches 3 bars.
• Drain taps must be provided at all low points of the installation to permit complete drainage of
the circuit during servicing.
PMEN0648 rev.0 - 03/2023
Shut-off
valves
Gaskets
Drain pipe for
safety valve
Safety
valve
7
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