Overview Of Electrical Connections - Viessmann KWT Vitocal 300-G Pro Installation And Service Instructions Manual

Overview of electrical connections

Note
■ Route 230 V cables and LV leads separately and
bundle them close to the terminals. This ensures
that, in the event of a fault, e.g. when detaching a
wire, the wires cannot drift into the adjacent voltage
area.
Strip the insulation as close to the terminals as pos-
■
sible.
■ If 2 components are connected to the same terminal,
press both cores together in a single wire ferrule.
Wiring chamber, top
C
W
D
U
V
Fig.31
Contactors for primary and secondary pumps
C
Terminal strip for system components (consumers)
D
3 x 400 V~/230 V~ (for connection, see separate
"Connection and wiring diagram" sheet 13).
Switched phase can be used for on-site system
components. Observe max. output.
EEV PCB
F
Main PCB with extension PCB
G
F3 MCB/Fuse 6.3 A (slow)
H
Controller and sensor PCB
K
K
L
M
F
H
F3
G
X24 Slot for LON communication module
L
X31 Coding card slot
M
MCB/fuse, power circuit, system components (con-
U
sumer at terminal strip
tion and wiring diagram" sheet 13 "13FC2")
V MCB/fuse, control circuit (see separate "Connec-
tion and wiring diagram" sheet 13 "13FC6")
Message and safety connections (safety chain)
W
with distribution terminal
Installation sequence
, see separate "Connec-
D
37