Hitachi YUTAKI S COMBI Series Installation And Operation Manual

45
PMEN0645 rev.0 - 04/2023
6
TERMINALBOARDCONNECTIONS
ELECTRICAL AND CONTROL SETTINGS
6.4.2.2 Summary of terminal board connecons
Mark
Part name
Descripon
TERMINAL BOARD 1 (TB1)
N
~ 230V 50Hz
3N~ 400V 50Hz Main power supply connecon
L1
L2
‑
L3
TERMINAL BOARD 2 (TB2)
1
H‑LINK commutaon
The H‑LINK transmission has to be done between the indoor unit and
the terminals 1‑2 of either outdoor unit, ATW‑RTU or any other central
device.
2
3
H‑LINK communicaon for
remote control switch
Terminals for the connecon of the YUTAKI unit controller.
4
5 Earth Earth connecon for the 3 way valve and water pump
6 Common thermistor Common terminal for thermistor.
7
Thermistor for water outlet
temperature of second cycle
The sensor is used for the second temperature control and should be
posioned aer the mixing valve and the circulaon pump.
8
Thermistor for water outlet
temperature aer hydraulic
separator
Water sensor for hydraulic separator, buer tank or boiler combinaon.
9 Common thermistor Common terminal for thermistors.
10
Thermistor for swimming pool
water temperature
The sensor is used for the swimming pool temperature control and should
be posioned inside plate heat exchanger of the swimming pool.
11
Thermistor for second ambient
temperature
The sensor is used for the second ambient temperature control and it
should be posioned outdoors.
12 Earth Earth connecon for the 3 way valve and water pump
13 Common line Terminal Line common for input 1 and input 2.
14
Input 1 (Demand ON/OFF) (*)
The air to water heat pump system has been designed to allow the
connecon of a remote thermostat to eecvely control your home’s
temperature. Depending on the room temperature, the thermostat will
turn the split air to water heat pump system ON and OFF.
15 Input 2 (ECO mode) (*)
Available signal which allows to reduce the water seng temperature of
circuit 1, circuit 2 or both.
16 Common line Terminal Line common for inputs 3, 4, 5, 6, 7.
17 Input 3 (Swimming pool) (*)
Only for swimming pool installaons: It is necessary to connect an
external input to the air to water heat pump to provide signal when the
water pump of swimming pool is ON.

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