Additional Hydraulic Optional Elements (For Dhw) - Hitachi YUTAKI S80 R410A Series Installation And Operation Manual

Additionally, the following elements are required for the DHW circuit:

NOTE
The discharge pipe should always be open to the atmosphere, free of frost and in continuous slope
to the down side in case that water leakage exists.
5.5.3 Additional hydraulic optional elements (For DHW)
In case of a recirculation circuit for the DHW circuit:
PMEN0648 rev.0 - 03/2023
Type Nº
1 Water inlet (DHW)
Piping
connections
2 Water outlet (DHW)
Pressure and temperature relief
valve
3a
3
Field
3b
supplied
3c
4 Shut-off valve
5 Draining
Type Nº
1 Water inlet (DHW)
Piping
connections
2 Water outlet (DHW)
Water check valve
Accessories 3
(ATW-WCV-01 accessory)
4 Water pump
Field
supplied
5 Shut-off valve
Part name
Shut-off valve
Water check valve
Pressure relief valve
Part name
5
38