45
Terminals
Function
Explanation
X3
■ Power supply terminals
of control unit "L1" and
auxiliary components
■ Switched phase L1:
X3.1, X3.2, X3.3, X3.7,
X3.11, X3.13
Terminals for signal and safety connec-
tions
Note
Switched phase can be used for on-site
system components. Observe max. out-
put.
X3.1
Switched phase
X3.2
X3.14
"External blocking" signal:
external blocking of com-
pressor and pumps, mixer
in control operation or
CLOSE
Requires zero volt
N/O
contact:
■ Closed: Power-OFF enabled
■ Open: No power-OFF
■ 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"
X3.3
X3.4
Flow limiter
Requires floating
N/O contact
(actu-
ated):
■ Closed: Heat pump in operation
■ Open: Heat pump shut down
■ Breaking capacity 230 V~, 0.15 A
Note
Connected with heat pump control cable
230 V~.
X3.6
X3.7
G
Power-OFF
Requires zero volt
N/C
contact:
■ Closed: No power-OFF (safety chain
has continuity)
■ Open: Power-OFF enabled
■ Breaking capacity 230 V~, 0.15 A
Installation sequence
Electrical connections, heat pump control unit
(cont.)
5516 436 GB
Installation
