Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 74

Installation sequence
Electrical connections in the heat pump control...
Connecting a temperature limiter as maximum temperature limiter for under-
floor heating system
General connection
X2.N
X1.
?
A
B
A Connection on the main PCB (211.2
or 212.2 in accordance with the
table above)
B Temperature limiter
C Heating circuit pump
74
M
C
1~
Connection with temperature limiter
(part no. 7151 728, 7151 729)
X2.N
X1.
?
A
B
A Connection on the main PCB (211.2
or 212.2 in accordance with the
table above)
B Temperature limiter
C Heating circuit pump
(cont.)
sÖ
M
C
1~