Hitachi YUTAKI S80 R410A Series Installation And Operation Manual page 70

◆ Thermistor for electrical box
The sensor is used for the electrical box temperature control.
ECO (Default for input 2)
◆
When enabled at Unit controller, both for circuit 1 and circuit 2, also for heating and cooling, this
input switches the indoor unit into an ECO mode by adjusting its settings only when input is closed.
The input can come from a push button, a thermostat or any other external device with that
purpose.
Swimming pool (Default for input 3)
◆
When it is necessary to control the temperature of the swimming pool water, a connection
between the heat pump and the corresponding sensor must be done on terminals 16 and 17 at the
Terminal board (input 4).
PMEN0648 rev.0 - 03/2023
11
9
THM
EBOX
13
15
Common
Line
ECO
Input 2
16 17
Common
Line
SWP
IN
Input 3
6
61