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5.7.8
Connections of SEC 20 installer module of indoor unit with electric heater
TR
7
TR
3
Fig. 12 SEC 20 installer module of indoor unit with electric heater
Continuous line = connection made at the factory
Dotted line = connection made during installation:
[1]
CAN-BUS to outdoor unit
[2]
Alarm electric heater/pressure switch (~230 V input voltage)
[3]
Power supply 230 V ~1 N
[4]
Code switch and LED bus communication
[T0]
Flow temperature sensor
[T1]
Outside temperature sensor
[TW1]
DHW sensor
[TC0]
Heat transfer medium in
[TC1]
Heat transfer medium out
[TC3]
Condenser temperature
[I1]
Ex. input
[TR7]
Hot gas temperature sensor
[TR3]
Liquid temperature sensor
[MK2]
Condensation point sensors
[Buzzer] Alarm sounder (accessory)
[PC0]
Pump primary circuit PWM signal
[I4]
Ex. input
[EE2]
Electric heater, step 2
[EE1]
Electric heater, step 1
[EE3]
Electric heater, step 3
[PW2]
DHW circulation pump
[E3]
Heating cable (HC), accessory (~230 V output)
[PK2]
Heating pump cooling buffer/fan convectors
[VW1]
3-way diverter valve for DHW (accessory)
[PC1]
Heating pump (heating system)
Compress 3000 AWES – 6720892204 (2020/06)
[PC0]
Heating pump (brine pump)
Max load for relay outputs PW2, PK2, VW1, PC1: 2 A, cos φ > 0.4.
Maximum load for CUHP inst.: 6.3 A
Note regarding input I1 (connection 13, 14) and I4 (connection 49, 50).
Contact on the component or relay that is connected to this input must
be suitable for 5 V and 1 mA.
Note regarding [4]:
Coding switches A and P must not be adjusted! Otherwise malfunctions
and faults will occur.
Important: check the coding when a replacement part is used.
Installation
15
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