Hitachi YUTAKI S Series Installation And Operation Manual

41
PMEN0643 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
DHW tank’s thermistor
The DHW sensor is used to control the temperature of the domesc hot
water tank.
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 Series Specifications

General

Type	Air-to-Water Heat Pump
Refrigerant	R410A
Cooling Capacity	2.5 - 16 kW
Operating Temperature Range (Cooling)	46°C
Indoor Unit Dimensions	Varies by model
Outdoor Unit Dimensions	Varies by model
Noise Level	Varies by model