46
Signal and safety connections
Terminals
Function
Explanation
F1
Fuse 6.3 A (slow)
X1
Earth conductor X1.
?
Terminals for earth conductor of
all
asso-
ciated system components
X2
Neutral conductor X2.N
Terminals for neutral conductor of
all
as-
sociated system components
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
Switched phase L1:
■ Switched phase can be used for on-site
system components.
■ Observe the total load 1000 W of all
connected components.
X3.1
Switched phase
X3.2
X3.14
"Block externally" signal
(external blocking of com-
pressor and pumps; mixer
in control mode or CLOSE)
Requires zero volt
N/O
contact:
■ Closed: Power-OFF enabled
■ Open: No power-OFF
■ Breaking capacity 230 V~, 2 mA
Note
■ The system may no longer be protected
against frost.
■ 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"
Installation sequence
Electrical connections
(cont.)
5546 267 GB
