ENGLISH
- Pressure protection
- Non-return function
- Shut-off valve
- Filling
- Draining
? 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.
6.7.1.2 Additional hydraulic optional elements (For DHW)
In case of a recirculation circuit for the DHW circuit:
Nature Nº Part name
Piping connections
1 Water inlet (DHW)
2 Water outlet (DHW)
Accessories 3
Water check valve
(ATW-WCV-01 accessory)
Field supplied
4 Water pump
5 Shut-off valve
• 1 Recirculation water pump (eld supplied): this water pump (3) will help to correctly recirculate the hot water to the DHW
inlet.
• 1 Water check valve (ATW-WCV-01 accessory): this Hitachi accessory (3) is connected after the recirculation water pump (4)
in order to ensure the non-return of water.
• 2 Shut-off valves (eld supplied) (5): one before the recirculation water pump (4) and other after the water check valve
accessory (3).
REFRIGERANT AND WATER PIPING
PMML0575 rev.2 - 03/2022
65
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