Hitachi YUTAKI M Bedienungsanleitung Seite 51

Output terminals (Default output functions)
◆ Mixing valve for Circuit 2
The mixing valve is controlled to maintain the second heating temperature at the second heating
temperature set point. The control system decides how much to open or close the mixing valve to
achieve the desired position of the valve.
24
(C)
Black
Brown
Mixing Valve
(Circuit 2)
◆ Water pump 2 Circuit 2
In case of a second circuit installation (second temperature level) the secondary pump is the
circulating pump for the second heating temperature.
26
(N)
M
Water pump II
(Circuit 2)
◆ Electrical heater DHW Tank 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.
!
CAUTION
When using a DHW tank other than those from Hitachi, the maximum connectable heater load is
3 kW (connected to TB2 terminals 30‑31).
PMEN0647 rev.0 - 11/2023
25 26
(O)
(N)
M
Blue
27
(L)
30
(N)
Terminal
24
25
26
Valve requirements:
Power supply: 230V AC 50Hz
Maximum running current: 100mA
Pump requirements:
Power supply: 230V AC 50Hz
Maximum running current: 500mA (An auxiliary
relay must be installed in case of high consumption
of the water pump).
31
(L)
Electrical
Heater
≤ 3kW
DHW Tank (EH )
4
Name Description
C Close
O Open
N Neutral
6
43