42
High limit safety cut-out for heat
pump in conjunction with an external
heat source
222.3
222.4
A
X3.1
X2.N
C
B
K1
D
A
Terminals on extension PCB
B
Move jumper from X3.1 to 222.3
C
Connection on the external heat
source at terminals for external
demand
D
High limit safety cut-out (max. 70
°C) as heat pump protection
K1 Relay; sizing in accordance with the
external heat source; observe
safety instructions
Plug
sXD
Terminals
Function
Explanation
223.1
223.2
U
Central fault message
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
Installation sequence
Electrical connections
(cont.)
5546 267 GB
