Hitachi YUTAKI S COMBI Series Installation And Operation Manual

31
PMEN0645 rev.0 - 04/2023
5
SPACE HEATING AND DHW
REFRIGERANT PIPING
✓ Pressure protecon
✓ Non-return funcon
✓ Shut-down valve
✓ Filling
✓ Draining
 NOTE
The discharge pipe should always be open to the atmosphere, free of frost and in connuous slope
to the down side in case that water leakage exists.
5.4.4.3 Addional hydraulic oponal elements (For DHW)
In case of a recirculaon circuit for the DHW circuit:
DHW TANK
Nature No. Part name
Piping connecons
1 Water inlet (DHW)
2 Water outlet (DHW)
Accessories 3
Water check valve
(ATW-WCV-01 accessory)
Field supplied
4 Water pump
5 Shut-o valve
• 1 Recirculaon water pump (eld supplied): this water pump (4) will help to correctly
recirculate the hot water to the DHW water inlet.
• 1 Water check valve (ATW-WCV-01 accessory): this Hitachi accessory (3) is connected aer the
recirculaon water pump (4) in order to ensure the non-return of water.
• 2 Shut-down valves (eld supplied) (5): one before the recirculaon water pump (4) and other
aer the water check valve accessory (3).

Hitachi YUTAKI S COMBI Series Specifications

General

Type	Air-to-Water Heat Pump
Energy Efficiency Class (Cooling)	A++
Refrigerant	R32
Operating Temperature Range (Heating)	-20°C to 35°C
Energy Efficiency Class (Heating)	A+++
Integrated DHW Tank	190 liters
Dimensions (Indoor Unit)	Varies by model
Dimensions (Outdoor Unit)	Varies by model
Weight (Indoor Unit)	Varies by model
Weight (Outdoor Unit)	Varies by model
Operating Temperature Range (Cooling)	+10°C to +46°C