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

Page: 42 / 100

42
Plug sXG
Terminals Function Explanation
225.1
M2
r
Heating circuit pump of the heating cir-
cuit with mixer M2/HC2 Connect a temperature limiter to restrict the maximum
temperature for underfloor heating circuits (if installed)
in series.
Connection values:
■
Output: 100 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Connection, see separate "Connection and wiring dia-
gram" sheet 130.
Use contactor if required; see separate "Connection
and wiring diagram" sheet 131, sheet 132.
225.2
M2
Mixer motor control, heating circuit
M2/HC2
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 130.
Use contactor if required; see separate "Connection
and wiring diagram" sheet 131, sheet 132.
225.3
M2
Mixer motor control, heating circuit
M2/HC2
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 130.
Use contactor if required; see separate "Connection
and wiring diagram" sheet 131, sheet 132.
Installation sequence
Overview of electrical connections
(cont.)
5549 984 GB
Installation