Hitachi YUTAKI M RASM-3WF2E Installation And Operation Manual page 45

◆ Second ambient temperature thermistor (TAMB2)
To control the second ambient temperature. The thermistor should be positioned outdoors and
have to be connected between terminals 9 and 11 of the terminal board 2.
◆ 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).
PMEN0657 rev.0 - 02/2024
9
11
T
AMB2
AuxSensor3
13
Common
Line
ECO
Input 2
16 17
Common
Line
SWP
IN
Input 3
15
6
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