Viessmann Vitocal 300-G BW, Installation And Service Instructions Manual

Page: 76 / 216

76
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 (maximum limiter for
underfloor heating systems)
Temperature limiter terminals
Protection for the
following heating
circuit
With heating
water buffer cylin-
der
Temperature limiter terminal
A1 No 2X8.7
A1 Yes 2X7.9
M2 Yes 2X8.11
M3 Yes Plug sÖ (on the extension kit for one
heating circuit with mixer M3)
Connection to heating circuit A1, M2
M
1~
C
B
N
?
A
2x7.9
?
2x8.7
2x8.11
A
Terminals on PCB 2
B Temperature limiter (maximum limit
for underfloor heating systems)
C Heating circuit pump A1, M2
Connection to heating circuit A1, M2
M
1~
C
B
N
?
A
2x7.9
?
2x8.7
2x8.11
sÖ
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
Installation sequence
Connection of electrical components
5368 522 UAE