47
Terminals
Function
Explanation
X3.12
X3.13
"External demand" signal:
external starting of com-
pressor and pumps; mixer
in control mode or OPEN,
changeover of the operat-
ing status of several system
components
Requires zero volt
N/O
contact:
■ Closed: Demand
■ Open: No demand
■ Breaking capacity 230 V, 2 mA
Note
■ These and further external functions,
such as provision of external set val-
ues, can alternatively be connected via
EA1 external extension.
Installation instructions "EA1
extension"
X3.17
X3.18
MCB/fuse F1 6.3 A (slow)
X3.18
Heat pump control unit
power supply:
Phase L1
X1.1 Earth conductor con-
nection
X2.1 Neutral conductor
connection
Power supply 230 V~
X5/X7
Connections for heat pump
control cable 230 V~
Controller and sensor PCB
Set the required parameters during com-
missioning: See from page 69.
Plug
Sensor/component
Type
F0.1/F0.2
Outside temperature sensor
NTC 10 kΩ
F0.2/F0.3
Radio clock receiver (accessories)
DCF
F4
Buffer temperature sensor
NTC 10 kΩ
F6
(X25.5/
X25.6)
Cylinder temperature sensor, top
NTC 10 kΩ
Installation sequence
Electrical connections, heat pump control unit
(cont.)
5516 436 GB
Installation
