Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 81

Electrical connections in the heat pump control...
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 107.
Message and safety connections
Terminals Function
F1 Fuse 6.3 A (slow)
X1 Earth conductor X1.?
X2 Neutral conductor X2.N
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
(cont.)
81