Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 127

ELECTRICAL AND CONTROL SETTINGS
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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.

Earth
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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.
Jumper
13
?
N O T E
• If wireless intelligent thermostat is selected, optional ON/OFF thermostat has no effect.
• Set the configuration in the user's control. See chapter
• In case of setting an installation with 2 circuits (Circuit 1 and Circuit 2) and a different Demand ON/OFF is used for each of them, please refer to
"7.4.3.2 Summary of terminal board connections YUTAKI S - RWM-(2.0-10.0)(N/R)1E"
• Auxiliary power supply is available for thermostats and central devices (28 and 29 terminals of TB2).
113 PMML0575 rev.2 - 03/2022
6
Circuit 2
Common
Line
14
"9 Unit controller (PC-ARFH2E)"
7
T
wo2
12
Earth
Jumper
13 14
13 14
Demand ON/OFF
Receiver input 2
for more information.
section in this chapter.
Thermostat requirements:
•
Power supply: 230V AC
•
Contact voltage: 230V