Cross Connect Pcb (Signal And Safety Connections) - Viessmann Vitocal 300-G Dismantling Instructions

Heat pump control unit electrical connections
Plug
sXD
Terminals Function
223.1
223.2
Central fault message
U
Central fault message
223.1
230 V~, 0.5 A
A
223.2
Fig. 17
Terminals on extension PCB
A

Cross connect PCB (signal and safety connections)

Message and safety connections
Terminals Function
F1 Fuse 6.3 A (slow)
X1 Earth conductor X1.
X2 Neutral conductor X2.N
X3 Terminals for power supply to con-
■
trol unit "L1" and on-site compo-
nents
Switched phase L1:
■
X3.1, X3.2, X3.3, X3.7, X3.11,
X3.13
X3.1 Switched phase
X3.2 "External blocking" signal: External
X3.14 compressor blocking
22
L1
N
?
(cont.)
Explanation
Floating contact:
Closed: Fault
■
Open: No fault
■
Not suitable for safety LV
■
Connection values (contact rating):
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Explanation
Note
Observe the total load of 1000 W for all connected
components.
Terminals for the earth conductor of all connected com-
ponents
Terminals for the neutral conductor of all connected
components
Terminals for signal and safety connections
Note
Switched phase can be used for on-site components.
Observe max. output.
Requires floating contact:
Closed: Blocking enabled
■
Open: No blocking
■
Breaking capacity 230 V~, 2 mA
■
Note
These and further external functions, e.g. provision of
external set values, can alternatively be connected via
external EA1 extension.
See "EA1 extension" installation instructions