ENGLISH
Mark
Part name
Description
19
Input 5 (Smart function) (*)
For the connection of an external tariff switch device to switch OFF the heat pump during peak
electricity demand period. Depending on the setting, the heat pump or DHWT will be blocked
when signal is open/closed.
20
Input 6 (DHW boost) (*)
Available input for an instantaneous heating of the domestic hot water of the tank.
21
Input 7 (Power meter)
The measuring of the real power consumption can be done connecting an external power meter.
The number of pulses of the power meter is a variable which must be set. By this, every pulse
input is added into corresponding operation mode (Heating, Cooling, DHW Operation). Two
possible options:
- One power meter for all installation (IU+OU).
- Two separated power meters (one for IU and one for OU).
22
Aquastat security for circuit 1 (WP1)
Terminals intended for the connection of the Aquastat security accessory (ATW-AQT-01) for
controlling water temperature of the circuit 1.
23
24(C) Mixing valve close
When a mixing system is required for a second temperature control, these outputs are necessary
to control the mixing valve.
25(O) Mixing valve open
26(N)
N Common
27(L) Water Pump 2 (WP2)
When there is a second temperature application, a secondary pump is the circulating pump for the
secondary heating circuit.
28
Aquastat security for circuit 2 (WP2)
Terminals intended for the connection of the Aquastat security accessory (ATW-AQT-01) for
controlling water temperature of the circuit 2.
29
30(N)
Electrical Heater DHW Output
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.
31(L)
32(C)
Common line
Common terminal for the 3-way valve for DHW tank.
33(L) 3-way valve for DHW tank
The air to water heat pump can be used to heat DHW. This output will be on when DHW is
activated.
34(N)
N common
Neutral terminal common for 3-way valve of DHW tank and outputs 1 and 2.
35(L) Output 1 (3-way valve for swimming
pool) (*)
The air to water heat pump can be use to heat swimming pool. This output will be ON when
swimming pool is activated.
36(L) Output 2 (Water pump 3 (WP3)) (*)
When there is a hydraulic separator or buffer tank, additional water pump (WP3) is needed.
37
Output 3 (Auxiliary boiler or electric
heater) (*)
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.
38
39
Output 4 (Solar) (*)
Output for solar combination with Domestic Hot Water Tank.
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.
7.4.2.3 Summary of the terminal board connections YUTAKI S80 - RWH-(4.0-6.0)(V)NF(W)E
Mark
Part name
Description
TERMINAL BOARD 1 (TB1)
N
1~ 230V 50Hz
3N~ 400 50Hz
Main power supply connection
L1
L2
-
L3
TERMINAL BOARD 2 (TB2)
1
H-LINK commutation
The H-LINK transmission has to be done between the indoor unit and the terminals 1-2 of either
outdoor unit, ATW-RTU-05 or any other central device.
2
3
H-LINK communication for remote
control switch
Terminals for the connection of the YUTAKI unit controller.
4
ELECTRICAL AND CONTROL SETTINGS
PMML0575 rev.2 - 03/2022
101
