Hitachi YUTAKI S80 R410A Series Installation And Operation Manual page 68

◆ Room thermostat communication cables
There are two different room thermostat types as accessory
Optional wireless intelligent room thermostat (TB2) ATW-RTU
Only for wireless room thermostat accessory: the receiver is connected to the polarity‑free
terminals1 and 2.
The Wireless room thermostat and the Intelligent receiver are already configured to communicate
with each other. If the Wireless room thermostat or the Intelligent receiver is replaced or an
additional second temperature circuit thermostat is added, it is necessary to rebind them as
explained in the manual of the Wireless intelligent room thermostat.
The Intelligent receiver is connected to the indoor unit table board as shown in the next picture:
Optional wireless ON/OFF room thermostat ATW-RTU-04
The heat pump system has been designed to allow the connection of a remote ON/OFF thermostat
to effectively control the home temperature. Depending on the room temperature, the thermostat
will turn the system to ON or OFF.
a. If no thermostat is installed
Terminals 13 and 14 are jumped if there is no ON/OFF receiver connected. When no remote
thermostat is installed the operating condition for the unit (Thermo ON/OFF) will be
controlled by the water calculation control system.
b. Installation of the ATW‑RTU‑04
In case of setting an installation with 2 circuits (circuit 1 and circuit 2) and the same demand
ON/OFF is used for both of them, remove the jumper between terminals 13 and 14 of the
Terminal board 2 and connect the RF receiver as shown in the following picture.
PMEN0648 rev.0 - 03/2023
2
1
1 2
H‑LINK
ATW‑RTU
Jumper
13 14
6
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