36
Plug
sYS
Terminals
Function
Explanation
212.2
A1
Heating circuit pump for heating cir-
cuit without mixer A1/HC1
■
This pump is connected in addition to the secondary
pump if a heating water buffer cylinder is installed.
■
Connect the temperature limiter to restrict the maxi-
mum temperature for underfloor heating systems (if
installed) in series.
Connection values
■
Output: 100 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
212.3
DHW circulation pump
Connection values
■
Output: 50 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
212.4
3-way diverter valve for heating water
buffer cylinder bypass or heat pump
in the case of dual alternative mode
Connection values
■
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Connecting a temperature limiter as a maximum temperature limiter for underfloor heating
Connecting a general temperature limiter
B
M
1~
C
B
X2.N
?
A
X1.
Fig. 34
Connecting the temperature limiter, part no. 7151 728,
7151 729
B
M
1~
C
B
sÖ
X2.N
?
A
X1.
Fig. 35
Connection
A
to con-
trol unit
Circulation pump
C
Heating circuit without mixer A1/HC1
■
Without heating water buffer cylinder
211.2
Secondary pump
■
With heating water buffer cylinder
212.2
Heating circuit pump A1/HC1
Heating circuit with mixer M2/HC2
225.1
Heating circuit pump M2/HC2
Installation sequence
Electrical connection
(cont.)
5790 931 GB
Installation
