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Technical information
Compress 3400i AWS – 6721852066 (2023/01)
34
11.4 Wiring diagram
11.4.1 Installer module of indoor unit with integrated electric booster heater
DANGER
Risk of electric shock!
Opening the installer module may cause injury by electric shock.
Never open the installer module.
Fig. 35 Installer module of the indoor unit
[1] A and P encoders
[2] Connectivity gateway (accessory)
[3] CAN-BUS to outdoor unit
[4] CAN termination switch
[5] Alarm electric heater (230V~ input voltage)
[6] Power supply, 230V~ from terminal blocks
[7] Fuse 5x20, 6.3A time lag
[T0] Heating circuit flow temperature sensor
[T1] Outside temperature sensor
[TW1] DHW temperature sensor
[TC0] Return temperature sensor
[TC1] Flow temperature sensor (electric booster heater)
[TC3] Condenser temperature sensor
[I1] External input 1
[I4] External input 4
[TR3] Refrigerant liquid temperature
[MK2]Condensation sensor(s)
[Buzzer] Alarm buzzer (accessory)
[PC0 PWM]PWM signal, primary circulation pump
[JR1] Refrigerant gas pressure sensor
[FE] Electric booster heater overheating alarm
[K2] Electric booster heater contactor EE2
[K1] Electric booster heater contactor EE1
[K3] Electric booster heater contactor EE3
[PW2]DHW circulation pump
[EA1] Connection to heating cable terminal blocks (outdoor unit
accessory)
[PK2] Relay output, cooling mode, 230V~
[VW1]DHW 3-way valve
[PC1] Heating circulation pump
[PC0] Primary circulation pump
Off
On
3
4
2
K1
K2
FE
M
PC0
M
PC1
M
PW2
PK2
EA1
JR1
BK GND
RD U5S
WH
M
PWM
PC0
PWM
MD1
T1
TC1
I1
TC0
T0
HMI bus
EMS bus
I4
Service Tools
BB tool
TC3
TR3
Buzzer
6
5
M
VW1
K3
1
0010035898-003
7
CAN-BUS
TW1
34


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