Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors page 163

Connection and wiring scheme
230 V∼ extension
(QX1)
(QX2)
EX1 EX2
(QX4)
(QX1) Floating contact QX1
(QX2) Floating contact QX2
(QX4) Floating contact QX4
EX1 Function input EX1
EX2 Function input EX2
(cont.)
QX1
QX2
QX1
QX2
QX4
fÖ
Regelung
40
QX4
Relay output QX1
Relay output QX2
Relay output QX4
Power supply
Designs
163