Viessmann Vitocal 300-G Installation And Service Instructions Manual page 76

Installation sequence
Electrical connections
Plug sYA
Terminals Function
211.4 ■ 3-way diverter valve for
heating/DHW
■ Circulation pump for cylin-
r
M
der heating
■ Cylinder primary pump
■ 2-way shut-off valve
M
211.5 Cooling control
NC function (natural cool-
ing)
NC/AC
Plug sYS
Terminals Function
212.1 Cooling control
AC function (active cooling)
AC AC
76
(cont.)
Explanation
Connection values
■ Output: 130 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
In type BWC, the circulation pump for
cylinder heating is connected at the fac-
tory.
Circuit on site
Connection values
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Explanation
Circuit on site
Connection values
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A