Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 125

ELECTRICAL AND CONTROL SETTINGS
Mark Part name
14 Input 1 (Demand ON/OFF) (*)
15 Input 2 (ECO mode) (*)
16 Common line
17 Input 3 (Swimming pool) (*)
18 Input 4 (Solar) (*)
19 Input 5 (Smart function) (*)
20 Input 6 (DHW boost) (*)
21 Input 7 (Power meter)
22
Aquastat security for circuit 1 (WP1)
23
24(C) Mixing valve close
25(O) Mixing valve open
26(N) N Common
27(L) Water Pump 2 (WP2)
28
Auxiliary power
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. Please, refer to the Service Manual for detailed information.
111 PMML0575 rev.2 - 03/2022
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.
Available signal which allows to reduce the water setting temperature of circuit 1, circuit 2 or both.
Terminal Line common for inputs 3, 4, 5, 6, 7.
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.
Available input for Solar combination with Domestic Hot Water Tank.
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.
Available input for an instantaneous heating of the domestic hot water of the tank.
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).
Terminals intended for the connection of the Aquastat security accessory (ATW-AQT-01) for
controlling water temperature of the circuit 1.
When a mixing system is required for a second temperature control, these outputs are necessary
to control the mixing valve.
When there is a second temperature application, a secondary pump is the circulating pump for the
secondary heating circuit.
Power supply for ATW-RTU and central device
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.
Description