Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 79

REFRIGERANT AND WATER PIPING
- Pressure protection
- Non-return function
- Shut-off valve
- Filling
- Draining
?
N O T E
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:
• 1 Recirculation water pump (field 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 (field supplied) (5): one before the recirculation water pump (4) and other after the water check valve
•
accessory (3).
65 PMML0575 rev.2 - 03/2022
Nature Nº
1
Piping connections
2
Accessories 3
4
Field supplied
5
Part name
Water inlet (DHW)
Water outlet (DHW)
Water check valve
(ATW-WCV-01 accessory)
Water pump
Shut-off valve