Viessmann BW 301.C090, Installation And Service Instructions For Contractors

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35
Plug sYS
Clamps Function Explanation
212.1
AC
Cooling control
AC function (active cooling) Connection values
■
Output: 10 W
■
Voltage: 230 V~
■
Max. control current: 4(2) A
Connection, see separate "Connection and wiring dia-
gram".
212.2
A1
Heating circuit pump for heating circuit
without mixer (A1/HC1)
■
This pump is connected in addition to the secondary
pump if a heating water buffer cylinder is installed.
■
Connect temperature limiter to restrict the maximum
temperature for underfloor heating circuit (if instal-
led) in series (see the following chapter).
Connection values
■
Output: 100 W
■
Voltage: 230 V~
■
Max. control current: 4(2) A
Connection, see separate "Connection and wiring dia-
gram".
Use contactor if required, see separate "Connection
and wiring diagram".
212.3 DHW circulation pump Connection values
■
Output: 50 W
■
Voltage: 230 V~
■
Max. control current: 4(2) A
Connection, see separate "Connection and wiring dia-
gram".
Use contactor if required, see separate "Connection
and wiring diagram".
Plug sXS
Clamps Function Explanation
222.1 Switching mixer motor for external
heat generator
Signal mixer CLOSE Connection values:
■
Output: 10 W
■
Voltage: 230 V~
■
Max. control current: 0.2(0.1) A
Connection, see separate "Connection and wiring dia-
gram".
222.2 Switching mixer motor for external
heat generator
Signal mixer OPEN Connection values:
■
Output: 10 W
■
Voltage: 230 V~
■
Max. control current: 0.2(0.1) A
Connection, see separate "Connection and wiring dia-
gram".
Installation sequence
Electrical connections
(cont.)
5787 232 GB
Installation