Viessmann Vitocal 300 AWO-M-AC 301.A, Installation And Service Instructions Manual

Page: 82 / 152

82
Plug
sYS
Terminals Function Explanation
212.2
A1
Heating circuit pump for
heating circuit without mixer
A1/HC1 ■ If a heating water buffer cylinder is
installed, this pump will be installed in
addition to the secondary pump.
■ Connect temperature limiter as maxi-
mum temperature limiter for underfloor
heating circuit (if installed) in series
(see the following chapter).
Connection values:
■ Output: 100 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
212.3 DHW circulation pump Connection values:
■ Output: 50 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
Connecting a temperature limiter as a maximum temperature limiter for under-
floor heating
Connecting a general temperature
limiter
B
M
1~
C
B
X2.N
?
A
X1.
Connecting the temperature limiter,
part no. 7151 728, 7151 729
B
M
1~
C
B
sÖ
X2.N
?
A
X1.
Installation sequence
Electrical connections in the heat pump control…
(cont.)
5692 875 GB