Caution
Separate the sensor cables from the 230/400 V circuit cables.
7.5.3
Description of the connection terminal blocks
EHC–04 PCB terminal block
X1 230 V - 50 Hz power supply
X4
Hydraulic version: Hydraulic back-up pump
Electrical version: Electrical back-up - stage 1
X5
Hydraulic version: Hydraulic back-up ON/OFF contact
Electrical version: Electrical back-up - stage 2
X7 CAN bus to the SCB-04 PCB
X8 Control panel display for the indoor module
X9 Sensors
X10 Main circulating pump command signal
X12 Options
R-Bus: Room temperature sensor/thermostat on/off or modulat
ing thermostat/OpenTherm
BL1 IN / BL2 IN: Multi-function inputs
So+/So- : Electric energy meter
Condensation: condensation sensor
X15 230-V power supply for the SCB-04 PCB
X17 Not used
X18 Input/output for the HPC–01 PCB
X19 Silent Mode option
X22 Bus connection to the PCB managing the HPC–01 outdoor unit
X23 Outdoor unit bus connection
X24 Electricity supply to the HPC–01 PCB (management of the outdoor
unit)
X25 Heating / Domestic hot water directional valve
X26 Pump - only if connecting a buffer tank
X27 Main circulating pump
X28 Outside sensor and domestic hot water tank temperature sensors
SCB-04 PCB terminal block
X1 Power supply for the pump/Three-way valve/Safety valve input
X2 PWM pump
X6 230 V power supply
X3
R-Bus: Room temperature sensor/thermostat on/off or modulat
ing/OpenTherm thermostat
Tout: Outdoor temperature sensor
Tflow: Flow sensor
X8 BUS
X9 BUS
7.5.4
Recommended cable cross section
The electrical characteristics of the mains power supply available must
correspond to the values given on the data plate.
The cable will be carefully chosen according to the following information:
Maximum intensity of the outdoor unit. See table below.
Distance of the appliance from the original power supply.
Upstream protection.
Neutral operating conditions.
Fig.55
Indoor module terminal block
MW-1001169-01
R-Bus
BL1 IN
BL2 IN
So+ So-
Condensation
X15
X26
X2
X25
X13 X6
X21
X28
X24
X12
X9
X4
X5
X19
X17
X16
X10
X23
X30
X18
X1
X20
EHC-04
X7
X8
X27
X22
}
Fig.56
MW-3000557-03
X8
X9
X3
X2
X1
FUSE
SW2
X6
7 Installation
7685645 - v04 - 07032018
AWHP-2 iMPI
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