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Installation

Compress 3000 AWES – 6720892204 (2020/06)

5.7.8 Connections of SEC 20 installer module of indoor unit with electric heater

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)

[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.

Bosch Compress 3000 AWES 2-6 User Manual

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