Input Terminals (Default Input Functions) - Hitachi YUTAKI S80 R410A Series Installation And Operation Manual

6.4.2.2 Input terminals (Default input functions)
PC-ARFH1E connection
◆
In those cases where the unit controller is ordered as a required accessory or those cases where
another PC‑ARFH1E must be connected as a second thermostat, the connections between PC‑ARFH1E
and the indoor unit must be done in terminals 3 and 4, as it is shown in the next picture:
DHWT Thermistor (TDHWT)
◆
For those cases in which a tank is installed as accessory, a thermistor must be installed to control
the water temperature. The connection for this thermistor must be done between terminals 5 and
6 of the TB2.
◆ Water outlet thermistor for circuit 2 (TWO2)
When the installation is configured with a second circuit the thermistor for the water outlet
temperature have to be connected between terminals 6 and 7 of the terminal board 2.
PMEN0648 rev.0 - 03/2023
3 4
A B
OK
RCS H‑LINK
(PC‑ARFH1E)
5 6
T
DHWT
DHWT
7
6
T
wo2
Circuit 2
6
58