Viessmann VITOCAL 242-S Installation And Service Instructions Manual page 45

Electrical connection
Plug sYS
Terminals Function
212.3 DHW circulation pump
212.4 Solar circuit pump with high
limit safety cut-out (up to
95 °C) for DHW cylinders
Connecting a temperature limiter as a maximum temperature limiter for under-
floor heating
Connecting a general temperature
limiter B
X2.N
X1.
?
A
B
C
(cont.)
Explanation
Connection values
■ Output: 50 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connection values
■ Output: 130 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect high limit safety cut-out, part no.
7506 168, in series to the solar circuit
pump: See "High limit safety cut-out" in-
stallation instructions.
Connecting the temperature limiter,
part no. 7151 728, 7151 729 B
M
1~
Installation sequence
X2.N
X1.
?
A
B
C
sÖ
M
1~
45