Viessmann Vitocal 300-G Installation And Service Instructions Manual page 85

Electrical connections
Plug sXG
Terminals Function
225.1 Heating circuit pump of the
heating circuit with mixer
M2
M2
r
225.2 Switching the mixer motor
for heating circuit M2
M2
Signal mixer CLOSED
225.3 Switching the mixer motor
for heating circuit M2
M2
Signal Mixer OPEN
Cross connect PCB
Set the required parameters during com-
missioning; see from page 108.
Message and safety connections
Terminals Function
F1 Fuse 6.3 A (slow)
X1 Earth conductor X1.?
X2 Neutral conductor X2.N
(cont.)
Explanation
Connect temperature limiter as maxi-
mum temperature limiter for underfloor
heating circuit (if installed) in series.
Connection values:
■ Output: 100 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
Connection values:
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 0.2(0.1) A
Connect on site.
Connection values:
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 0.2(0.1) A
Connect on site.
Explanation
Earth terminals for all associated system
components
Terminals for neutral conductor for all
associated system components
Installation sequence
85