Viessmann Vitoclima 300-S Service Instructions For Contractors page 40

Connection and wiring diagrams
Internal devices
(cont.)
Duct mounted device, type D304H
A Connection with external unit
B Room temperature sensor
C Temperature sensor at the heat
exchanger of the internal device
D Power supply, 230 V~, 50 Hz
E Control PCB
40
F Receiver
G Condensate overflow switch
H Fan
K Stepper motor for horizontal air
flap
L On-site condensate pump (option)