Viessmann Vitocal 300 AWO-M-AC 301.A, Installation And Service Instructions Manual

Page: 89 / 152

89
Plug
sXG
Terminals Function Explanation
225.1
M2
r
Heating circuit pump of the
heating circuit with mixer
M2/HC2 Connect the temperature limiter in series
as maximum temperature limiter for
underfloor heating circuit (if installed).
Connection values:
■ Output: 100 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
225.2
M2
Mixer motor control, heating
circuit M2/HC2
Signal mixer CLOSED Connection values:
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 0.2(0.1) A
Connect on site.
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
Connect on site.
Cross connect PCB
Set the required parameters during commissioning; see from page 110.
Message and safety connections
Terminals
Function Explanation
F1 Fuse 6.3 A (slow)
X1 Earth conductor X1.
?
Earth terminals for all associated system
components
X2 Neutral conductor X2.N Terminals for neutral conductor for all
associated system components
Installation sequence
Electrical connections in the heat pump control…
(cont.)
5692 875 GB
Installation