Connection Of Electrical Components - Viessmann Vitocal 300-G BW Installation And Service Instructions Manual

Installation sequence

Connection of electrical components

Temperature limiter (maximum limit for underfloor heating sys-
tems)
Note
The temperature limiter must be connec-
ted in series with the circulation pump.
Temperature limiter terminals
Protection for the
following heating
circuit
A1
A1
M2
M3
Connection to heating circuit A1, M2
A
N
?
2x7.9
2x8.7
B
2x8.11
?
A Terminals on PCB 2
B Temperature limiter (maximum limit
for underfloor heating systems)
C Heating circuit pump A1, M2
76
With heating
water buffer cylin-
der
No
Yes
Yes
Yes
M
C
1~
Temperature limiter (maximum limiter for
underfloor heating systems)
Temperature limiter terminal
2X8.7
2X7.9
2X8.11
Plug sÖ (on the extension kit for one
heating circuit with mixer M3)
Connection to heating circuit A1, M2
A
N
?
2x7.9
2x8.7
B
2x8.11
?
A Terminals on PCB 2 (remove plug
on temperature limiter)
B Temperature limiter (maximum lim-
iter for underfloor heating system,
part no. 7151 728, 7151 729)
C Heating circuit pump A1, M2
sÖ
M
C
1~