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ELECTRICAL AND CONTROL SETTINGS
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.
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
"YUTAKI S"
section in this chapter.
•
Auxiliary power supply is available for thermostats and central devices (28 and 29 terminals of TB2).
44
PMML0575 rev.1 - 09/2021
Jumper
14
"7 Unit controller"
Jumper
13
14
13
14
Common
Line
Demand ON/OFF
Receiver input 2
Thermostat requirements:
•
•
for more information.
Power supply: 230V AC
Contact voltage: 230V
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