28
High limit safety cut-out for heat pump in conjunc-
tion with external heat generator
222.3
222.4
A
X3.1
X2.N
C
B
K1
D
Fig. 16
A
Terminals on extension PCB
B
Connect jumper across X3.1 and 222.3.
C
Connection on external heat generator to terminals
for "External demand"
D
High limit safety cut-out to protect the heat pump
(max. 70 °C)
K1 Relay
■
Sizing according to the external heat generator
■
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
Central fault message
223.1
L1
230V~, 0.5 A
N
223.2
A
Fig. 17
A
Terminals on extension PCB
Installation sequence
Electrical connection
(cont.)
5855006
Installation
