Viessmann KWT BW 301.B090, Installation And Service Instructions Manual

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40
Plug sYS
Terminals Function Explanation
212.1
AC
Cooling control
AC function (active cooling) Connection values
■
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Connection, see separate "Connection and wiring dia-
gram" sheet 201 to sheet 204
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 a temperature limiter to restrict the maxi-
mum temperature for underfloor heating circuits (if
installed) in series (see following chapter)
Connection values
■
Output: 100 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Connection, see separate "Connection and wiring dia-
gram" sheet 120.
Use contactor if required; see separate "Connection
and wiring diagram" sheet 121, sheet 122.
212.3 DHW circulation pump Connection values
■
Output: 50 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Connection, see separate "Connection and wiring dia-
gram" sheet 150.
Use contactor if required; see separate "Connection
and wiring diagram" sheet 151, sheet 152.
Plug sXS
Terminals Function Explanation
222.1 Switching mixer motor for external
heat generator
Signal mixer CLOSE Connection values:
■
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 0.2(0.1) A
Connection, see separate "Connection and wiring dia-
gram" sheet 170, sheet 171, sheet 172.
222.2 Switching mixer motor for external
heat generator
Signal mixer OPEN Connection values:
■
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 0.2(0.1) A
Connection, see separate "Connection and wiring dia-
gram" sheet 170, sheet 171, sheet 172.
Installation sequence
Overview of electrical connections
(cont.)
5549 984 GB
Installation