Viessmann 7514659, Installation And Service Instructions Manual

Page: 37 / 140

37
Plug sYS
Terminals Function Explanation
212.1
AC Switching the active cooling
function Circuit on site
Connection values
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
212.2
A1
Heating circuit pump for
heating circuit without mixer
A1/HC1 ■ This pump is connected in addition to
the secondary pump if a heating water
buffer cylinder is installed.
■ Connect a temperature limiter to restrict
the maximum temperature for under-
floor heating circuits (if installed) in ser-
ies.
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 cylin-
der 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
Installation sequence
Electrical connections
(cont.)
5546 267 GB
Installation