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

Page: 77 / 216

77
Connection with temperature limiter
to extension kit to heating circuit M3
M
1~
C
B
A
?
sÖ
sÖ
A
Plug
sÖ
for extension kit
B Temperature limiter (maximum lim-
iter for underfloor heating system,
part no. 7151728, 7151729)
C
Heating circuit pump M3
"Ext. demand", "Ext. mixer open", "Ext. operating mode change-
over"
These functions can also be connected via the "External extension H1". The switching
function via "External extension H1" can only be used for
one function at the time
(e.g. swimming pool water heating or "Ext. demand").
Installation instructions "External
extension H1"
Note
Requires a zero volt N/O contact, break-
ing capacity AC 230; 0.1 A
1X3.13
1X3.12
A B
A Terminals on PCB 1
B Zero volt N/O contact (outside the
control unit)
Installation sequence
Connection of electrical components
(cont.)
5368 522 UAE
Installation