Mark Part name Description
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
? NOTE
(*): 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 congured and used. Please, refer to the Service Manual for detailed information.
7.4.2.2 Summary of the terminal board connections YUTAKI M - RASM-(4-6)(V)NE
Mark Part name Description
TERMINAL BOARD 2 (TB2)
1
H-LINK commutation
The H-LINK transmission has to be done between the 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
5 DHW tank’s thermistor The DHW sensor is used to control the temperature of the domestic hot water tank.
6
Common thermistor
Common terminal for thermistor.
7
Thermistor for water outlet
temperature of second cycle
The sensor is used for the second temperature control and should be positioned after the mixing
valve and the circulation pump.
8
Thermistor for water outlet
temperature after hydraulic separator
Water sensor for hydraulic separator, buffer tank or boiler combination.
9 Common thermistor Common terminal for thermistors.
10
Thermistor for swimming pool water
temperature
The sensor is used for the swimming pool temperature control and should be positioned inside
plate heat exchanger of the swimming pool.
11
Thermistor for second ambient
temperature
The sensor is used for the second ambient temperature control and it should be positioned
outdoors.
11
4-20 mA application
It is possible to connect an external controller to the connector CN5 to provide a manual water
temperature setting. The input current (4-20 mA) will be transformed into voltage by means of a
grounded 240 Ω resistor (ATW-MAK-01 accessory) connected to these terminals. The DSW5 pin
3 must be in ON position and the SSW1 has to be in Local mode (Enabled manual operation) to
enable this function.
12
13 Common line Terminal Line common for input 1 and input 2.
14 Input 1 (Demand ON/OFF) (*)
The air to water heat pump system has been designed to allow the connection of a remote
thermostat to effectively control your home’s temperature. Depending on the room temperature,
the thermostat will turn the split air to water heat pump system ON and OFF.
15
Input 2 (ECO mode) (*)
Available signal which allows to reduce the water setting temperature of circuit 1, circuit 2 or both.
16 Common line Terminal Line common for inputs 3, 4, 5, 6, 7.
17 Input 3 (Swimming pool) (*)
Only for swimming pool installations: It is necessary to connect an external input to the air to
water heat pump to provide signal when the water pump of swimming pool is ON.
18 Input 4 (Solar) (*) Available input for Solar combination with Domestic Hot Water Tank.
ELECTRICAL AND CONTROL SETTINGS
PMML0575 rev.2 - 03/2022
100
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