Viessmann VITOCAL 300-G PRO Installation And Service Instructions Manual page 59

Overview of electrical connections
Plug sYS
Terminals Function
212.1 Cooling control
AC AC function (active cooling)
212.2 Heating circuit pump for
heating circuit without mixer
A1
(A1/HC1)
212.3 DHW circulation pump
Installation sequence
(cont.)
Explanation
Connection values
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Circuit on site, see separate "connection
and wiring diagram" sheet 201 to
sheet 204
■ This pump is connected in addition to
the secondary pump if a heating water
buffer cylinder is installed.
■ Connect temperature controller as a
maximum temperature limiter for un-
derfloor heating circuit (if installed) in
series (see following chapter)
Connection values
■ Output: 100 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
On-site connection, see separate "con-
nection and wiring diagram" sheet 120.
Use contactor, if required; see separate
"connection and wiring diagram"
sheet 121, sheet 122.
Connection values
■ Output: 50 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
On-site connection, see separate "con-
nection and wiring diagram" sheet 150.
Use contactor, if required; see separate
"connection and wiring diagram"
sheet 151, sheet 152.
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