Viessmann VITOCAL 300-G PRO Installation And Service Instructions Manual page 58

Installation sequence
Overview of electrical connections
Working components 230 V~
Plug sYA
Terminals Function
211.3 Instantaneous heating water
heater switching, stage 1
1.
r
211.5 Cooling control
NC NC function (natural cooling)
or NC signal for AC function
(active cooling)
58
(cont.)
Explanation
Connection values
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
On-site connection, see separate "Con-
nection and wiring diagram" sheet 110.
Connection values
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Circuit on site
■ NC function, see separate "Connec-
tion and wiring diagram" sheet 191,
sheet 192
■ AC function, see separate "Connec-
tion and wiring diagram" sheet 201,
sheet 203