Hitachi YUTAKI M RASM-2VRE Instruction Manual page 36

ELECTRICAL AND CONTROL SETTINGS
10.3 WIRING SIZE AND MINIMUM REQUIREMENTS OF THE PROTECTION DEVICES
!
C A U T I O N
• Check to ensure that the field supplied electrical components (mains power switches, circuit breakers, wires, connectors and wire terminals) have
been properly selected according to the electrical data indicated on this chapter and they comply with national and local codes. If it is necessary,
contact with your local authority in regards to standards, rules, regulations, etc.
• Use a dedicated power circuit for the unit. Do not use a power circuit shared with the outdoor unit or any other appliance.
Use wires which are not lighter than the polychloroprene sheathed flexible cord (code designation 60245 IEC 57).
Power
Model
supply
RASM-2VRE
1~ 230V 50Hz
RASM-3VRE
?
N O T E
The data corresponding to DHW tank heater is calculated in combination with the domestic hot water tank accessory "DHWT-(200/300)S-3.0H2E".
!
C A U T I O N
• Ensure specifically that there is an Earth Leakage Breaker (ELB) installed for the units (outdoor unit).
• If the installation is already equipped with an Earth Leakage Breaker (ELB), ensure that its rated current is large enough to hold the current of the
units (outdoor unit).
?
N O T E
• Electric fuses can be used instead of magnetic Circuit Breakers (CB). In that case, select fuses with similar rated values as the CB.
• The Earth Leakage Breaker (ELB) mentioned on this manual is also commonly known as Residual Current Device (RCD) or Residual Current
Circuit Breaker (RCCB).
• The Circuit Breakers (CB) are also known as Thermal-Magnetic Circuit Breakers or just Magnetic Circuit Breakers (MCB).
10.4 OPTIONAL UNIT WIRING (ACCESSORIES)

Summary of the terminal board connections
Mark Part name
N
1~ 230V 50Hz
L1
L2
-
L3
1
H-LINK commutation
2
3
H-LINK communication for remote
control switch
4
5 DHW tank's thermistor
6 Common thermistor
Thermistor for water outlet
7
temperature of second cycle
Thermistor for water outlet
8
temperature after hydraulic separator
9 Common thermistor
16 PMML0506 rev.2 - 01/2021
Power supply cables
Operation mode
- 2 x 2.50 mm² + GND
With DHW tank heater 2 x 6.0 mm² + GND
- 2 x 4.0 mm² + GND
With DHW tank heater 2 x 6.0 mm² + GND
TERMINAL BOARD 1 (TB1)
Main power supply connection
TERMINAL BOARD 2 (TB2)
The H-LINK transmission has to be done between the indoor unit and the terminals 1-2 of either
outdoor unit, ATW-RTU or any other central device.
Terminals for the connection of the YUTAKI unit controller.
The DHW sensor is used to control the temperature of the domestic hot water tank.
Common terminal for thermistor.
The sensor is used for the second temperature control and should be positioned after the mixing
valve and the circulation pump.
Water sensor for hydraulic separator, buffer tank or boiler combination.
Common terminal for thermistors.
Transmitting cables
EN60335-1 EN60335-1
2 x 0.75 mm
Description
CB ELB
(A) (nº of poles/A/mA)
16
2/40/30
32
2
20
32 2/40/30