89
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 message and safety con-
nections
Note
Switched phase can be used for on-site
system components. Observe max. out-
put.
X3.1
Switched phase
X3.2
X3.14
or at exter-
nal exten-
sion H1
Signal "External blocking"
(external blocking of com-
pressor and pumps, mixer
in control operation or
CLOSED)
Note
The system may no longer
be protected against frost.
Requires floating
N/O
contact:
■ Closed: Blocking active
■ Open: No blocking
■ Breaking capacity 230 V~, 2 mA
Note
■ These and further external functions,
such as swimming pool heating, cas-
cade or external set value default can
alternatively be connected via external
extension H1.
Installation instructions "Exter-
nal extension H1"
■ If a swimming pool heating facility is
connected to external extension H1,
no other external function can be con-
nected to external extension H1.
X3.3
X3.4
Flow switch, well circuit
Floating contact required:
■ Closed: Heat pump operational
■ Open: Heat pump shut down
■ Breaking capacity 230 V~, 0.15 A
There should be
no
jumper if a flow switch
is connected.
Installation sequence
Electrical connections
(cont.)
5609 667 GB
Installation
