Hitachi YUTAKI S80 R410A Series Installation And Operation Manual page 63

6.4.2 Table board 2
RWH-(4.0-6.0)(V)NF(W)E (From January 2023 S/N: ≥ 80202A30184431)
◆
Mark
N
~ 230V
50Hz
L1
L2
‑
L3
1
H‑LINK commutation
2
3
H‑LINK communication for remote control switch
4
5 DHW tank's thermistor
6 Common thermistor
Thermistor for water outlet temperature of second
7
cycle
8 Thermistor for water outlet temperature of third cycle
9 Common thermistor
Thermistor for swimming pool water temperature
10
(As default: Aux Sensor 2)
11 Thermistor for electrical box
13 Common line
14 Input 1 (Demand ON/OFF) (*)
15 Input 2 (ECO mode) (*)
16 Common line
17 Input 3 (Swimming pool) (*)
PMEN0648 rev.0 - 03/2023
Part name
TERMINAL BOARD 1 (TB1)
3N~ 400V 50Hz
TERMINAL BOARD 2 (TB2)
Description
Main power supply connection
The H‑LINK transmission has to be done between
the indoor unit and the terminals 1‑2 of either
outdoor unit, ATW‑RTU‑07 or any other central
device.
PC‑ARFH1E
The DHW sensor is used to control the temperature
of the domestic hot water tank.
Common terminal for thermistor
The sensor is used for the second temperature
control and should be positioned after the mixing
valve and the circulation pump.
The sensor is used for the third temperature
control and should be positioned after the hydraulic
separator, buffer tank or boiler combination.
Common terminal for thermistor.
The sensor is used for the swimming pool
temperature control and should be positioned inside
plate heat exchanger of the swimming pool.
The sensor is used for the electrical box temperature
control.
Terminal Line common for input 1 and input 2.
The air to water heat pump system has been
designed to allow the connection of a remote
thermostat to effectively control your home's
temperature. Depending on the room temperature,
the thermostat will turn the air to water heat pump
system ON and OFF.
Available signal which allows to reduce the water
setting temperature of circuit 1, circuit 2 or both.
Terminal Line common for inputs 3, 4, 5, 6, 7.
Only for swimming pool installations: 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.
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