Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 133

ELECTRICAL AND CONTROL SETTINGS
Mark Part name
28
Auxiliary power
29
30(N)
Electrical Heater DHW Output
31(L)
32 Output 9
33(L) L common
34(N) N common
Output 1 (3-way valve for swimming
35(L)
pool) (*)
36(L) Output 2 (Water pump 3 (WP3)) (*)
37
Output 3 (Auxiliary boiler or electric
heater) (*)
38
39
Output 4 (Solar) (*)
40
?
N O T E
(*): Inputs and outputs explained in the table are the factory-set options. By means of the unit controller, some other inputs and outputs functions can
be configured and used. Please, refer to the Service Manual for detailed information.
7.4.3.5 Input terminals (Default input functions)

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:
1

PC-ARFH2E connection
In cases where another PC-ARFH2E must be connected as a second thermostat, the connections between PC-ARFH2E and the
indoor unit must be done in terminals 3 and 4, as it is shown in the next picture:
119 PMML0575 rev.2 - 03/2022
Power supply for ATW-RTU and central device
If DHW tank contains an electric heater, the air to water heat pump can activate it if the heat
pump cannot achieve the required DHW temperature by itself.
Power supply for valve accessories
Neutral terminal common for outputs 1 , 2 and 9.
The air to water heat pump can be use to heat swimming pool. This output will be ON when
swimming pool is activated.
When there is a hydraulic separator or buffer tank, additional water pump (WP3) is needed.
The boiler can be used to alternate with the heat pump when the heat pump cannot achieve the
required temperature by itself.
A water electric heater (as accessory) can be used to provide the additional heating required on
the coldest days of the year.
Output for solar combination with Domestic Hot Water Tank.
2
1 2
H-LINK
ATW-RTU
3
Description
28 29
L N
AUXILIARY POWER
(ATW-RTU)(CENTRAL
Power supply: 230V AC 50Hz
DEVICE)
4
A B
OK
RCS H-LINK
(PC-ARFH2E)