Hitachi YUTAKI S COMBI Series Installation And Operation Manual page 59

◆ Smart tariff (Default for input 5)
This function can be used to block or limit the heat pump. It allows an external Smart switch device
to switch off or limit the heat pump during a period of peak electricity demand. Terminals 16 and
19 of the TB2.
◆ DHW boost (Default for input 6)
This function allows a request for a one‑time heating up of the domestic hot water temperature.
The input can be sent by a push button, a NC contact and a NO contact. This input is switched on
terminals 16 and 20 of the TB2.
Power Meter (Default for input 7)
◆
This function is used to monitor real consumption of the system by means an external power
meter device connected at this input. The calculation method is done by measuring real
consumption of the whole installation with one power meter device or 2 separate power meter
(one for indoor unit and another one for outdoor unit).
Common
Line
PMEN0645 rev.0 - 04/2023
16
Common
Line
16
Common
Line
16
19
T
T
Smart F.
Input 5
20
DHW Boost
input 6
21
Power M.
input 7
6
50