Hitachi YUTAKI S COMBI Series Installation And Operation Manual

58
PMEN0645 rev.0 - 04/2023
7
REMOVING THE COVERS
MAINTENANCE
7.1.0.3 Space heang pipes connecon
The unit is factory supplied with two shut-down valves to be connected to the water inlet/outlet
pipe. With these shut-down valves it is very praccal to connect the indoor unit to the heang
system by using the factory supplied gaskets just below the valves (2-3HP: G 1”; 4-6HP: G 1-1/4”).
Then, the space heang installaon can be carried out.
Shut-o valves
Gaskets
7.1.0.4 DHW pipes connecon
The connecon between the DHW installaon and the DHW connecons of the indoor unit must
be done taking into account the following consideraons:
1 Install a pressure and temperature relief valve at the DHW inlet connec on (as close as possible
to the tank) to provide the following funcons.
• Pressure protecon
• Non-return funcon
• Shut-down valve
• Filling
• Draining
If not, a specic device for each funcon should be installed.
2 Install also a shut-down valve (eld supplied) in the DHW outlet connecon, in order to make
easier any maintenance work.
 NOTE
For more details, refer to the secon “5.4.4.3 Addional hydraulic oponal elements (For DHW)”.

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