Hitachi YUTAKI ATW-YMM-01 Installation And Operation Manual page 15

ELECTRICAL AND CONTROL SETTINGS
Mark Part name
28
Aquastat security for circuit 2 (WP2)
29
30(N)
Electrical Heater DHW Output
31(L)
32(C) Common line
33(L) 3-way valve for DHW tank
34(N) N common
Output 1 (3-way valve for swimming
35(L)
pool) (*)
36(L) Output 2 (Water pump 3 (WP3)) (*)
37
Output 3 (Auxiliary boiler or electric
heater) (*)
38
39
Output 4 (Solar) (*)
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. Refer to the YUTAKI M and the PC-ARFHE Installation and operation manual for detailed information.
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Connection on PCB2 of YUTAKI M unit
The following connections should remain in the PCB2 of the YUTAKI M unit
Mark Part name
22
Aquastat security for circuit 1 (WP1)
23
9 PMML0345A rev.1 - 08/2016
Terminals intended for the connection of the Aquastat security accessory (ATW-AQT-01) for
controlling water temperature of the circuit 2.
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.
Common terminal for the 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.
Neutral terminal common for 3-way valve of DHW tank and outputs 1 and 2.
The air to water heat pump can be use to heat swimming pool. This output will be ON when
swimming pool is activated.
When there is a hydraulic separator or buffer tank, additional water pump (WP3) is needed.
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.
Output for solar combination with Domestic Hot Water Tank.
Terminals intended for the connection of the Aquastat security accessory (ATW-AQT-01) for
controlling water temperature of the circuit 1.
Description
Description