Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 130

ELECTRICAL AND CONTROL SETTINGS

Electrical heater DHWT output
In those cases where a DHW tank is installed with an electrical heater, the Air to Water heat pump can activate the electric heater of
the tank when the heat pump cannot achieve the required DHW temperature by itself.
!
C A U T I O N
When using a DHW tank other than those from Hitachi, the maximum connectable heater load is 3 kW (connected to TB2 terminals 30-31).

3 Way valve for DHW tank output
YUTAKI units can be used to heat DHW. The signal is used on a 3-way motorized diverting valve and to provide control of supply
water flow (water flow for space heating when there is no signal, and water flow for DHW when signal is ON)
32
(C)
Black
Output terminals (Optional output functions)

3 Way valve for Swimming pool (Default for Output 1)
YUTAKI units can be used to heat the water of a swimming pool. The signal is used on a 3-way motorized diverting valve and to provide
control of supply water flow for the swimming pool. This output is available when the function is enabled from the Unit controller.
Using the appropriate wiring, connect the valve cables as shown in the previous picture.
33
(L)
Brown

Water pump 3 (Default for Output 2)
When the boiler is configured with the heat pump or needs an additional pump for the system, a hydraulic separator or buffer tank
must be used to ensure a correct hydraulic balance
116 PMML0575 rev.2 - 03/2022
30
(N)
33 34
(L)
Brown
M
Blue
3WV / DHW
DHWT
34 35
(N) (C)
Blue
M
Black
3WV / SWP
Output 1
34
(N)
31
(L)
Electrical
≤ 3kW
Heater
DHWT (EH )
4
Valve requirements:
• Power supply: 230V AC 50Hz
• Maximum running current: 100mA
Valve requirements:
• Power supply: 230V AC 50Hz
• Maximum running current: 100mA
36
(L)
M
Water pump III
(Output 2)