Viessmann AWT 221.A04, Installation And Service Instructions For Contractors

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36
Plug sYS
Terminals Function Explanation
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. 27
Connecting the temperature limiter, part no. 7151 728,
7151 729
B
M
1~
C
B
sÖ
X2.N
?
A
X1.
Fig. 28
Heating circuit without mixer A1/HC1 Connection A to
control unit
Circulation pump C
■
Without heating water buffer cylinder 211.2 Secondary pump
■
With heating water buffer cylinder 212.2 Heating circuit pump A1/HC1
Connecting the temperature limiter, part no. 7151 728,
7151 729
B to mixer extension kit
M
1~
C
B
A
sÖ
sÖ
Fig. 29
A
Connect plug
sÖ
to mixer extension kit
B
Temperature limiter
C
Heating circuit pump for heating circuit with mixer
Installation sequence
Electrical connection
(cont.)
5776 028 GB
Installation