Viessmann VITOCAL 350-A Installation And Service Instructions Manual page 54

Installation sequence
Electrical connections: Heat pump control unit
Connecting a temperature limiter as a maximum temperature limiter for underfloor heating
Connecting a general temperature limiter
X2.N
X1.
?
A
B
M
C
1~
Fig. 51
Heating circuit without mixer A1/HC1
Without heating water buffer cylinder
■
With heating water buffer cylinder
■
Heating circuit with mixer M2/HC2
Connecting the temperature limiter, part no. 7151728,
7151729 to the mixer extension kit
B
A
N
?
sÖ
B
sÖ
M
C
1~
Fig. 53
Connect plug to the extension kit.
A sÖ
Temperature limiter
B
Heating circuit pump M3/HC3
C
54
(cont.)
Connecting the temperature limiter, part no. 7151728,
B
7151729
X2.N
X1.
?
A
Fig. 52
Connection
A
trol unit
211.2
212.2
225.1
B
B
sÖ
M
C
1~
to con- Circulation pump
Secondary pump
Heating circuit pump A1/HC1
Heating circuit pump M2/HC2
C