Hitachi YUTAKI S COMBI Series Installation And Operation Manual

48
PMEN0645 rev.0 - 04/2023
6
TERMINALBOARDCONNECTIONS
ELECTRICAL AND CONTROL SETTINGS
◆ Water outlet thermistor for circuit 2 (T
WO2
)
When the installaon is congured with a second circuit the thermistor for the water outlet
temperature have to be connected between terminals 6 and 7 of the terminal board 2.
7
6
T
wo2
Circuit 2
◆ Oponal wireless ON/OFF room thermostat ATW-RTU-04
The heat pump system has been designed to allow the connecon of a remote ON/OFF thermostat
to eecvely control the home temperature. Depending on the room temperature, the thermostat
will turn the system to ON or OFF.
a. If no thermostat is installed
Terminals 13 and 14 are jumped if there is no ON/OFF receiver connected. When no remote
thermostat is installed the operang condion for the unit (Thermo ON/OFF) will be
controlled by the water calculaon control system.
13 14
Jumper
b. Installaon of the ATW‑RTU‑04
In case of seng an installaon with 2 circuits (circuit 1 and circuit 2) and the same demand
ON/OFF is used for both of them, remove the jumper between terminals 13 and 14 of the
Terminal board 2 and connect the RF receiver as shown in the following picture.
Thermostat requirements:
• Power supply: 230V AC
• Contact voltage: 230V
13 14
13 14
Jumper
Common
Line
Demand ON/OFF
Receiver input 2

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