11
Caution
Left-hand terminal
compartment only for
low voltage if
max. 12VAC/DC
Danger
Right-hand terminal
compartment only for mains
voltages of
230VAC 50-60Hz
Low voltage
max. 12VAC/DC
connection in the left-hand terminal com-
partment!
Terminal:
Connection for:
-
Jumper terminal block S-
S1 outdoor
S2
heating circuit
S3
heating circuit 2
S4
buffer
S5
indoor sensor
S6
remote adjuster*
+
not used
Z1
Option / add. function
Z2
Option / add. function
Use terminal block S- for connecting the
sensor earths of S1-S6. The polarity of the
sensors is freely selectable.
The sensors S3-S6 are optional, depen-
ding on the hydraulic variant chosen.
Mains Voltage
230VAC 50-60Hz con-
nection in the right-hand terminal com-
partment.
Terminal:
Connection for:
N
Jumper terminal block N
L
Mains phase conductor L
R1
Heat circuit pump
R2
Mixer open
R3
Mixer close
R4
Heat circuit pump (HC2)
R5
add. heating
R5I
add. heating
The PE protective conductor must be con-
nected to the PE metal terminal block!
* Note: If the remote adjuster RC21 or a different external floating thermostat is
connected, the bridge at S6 has to be removed.
Connections Mains Voltage:
- Protective conductor PE metal terminal
block
- Neutral conductor terminal block N
- Mains phase conductor L
- Switch output R1-R4
- Floating contact at R5/R5I
Caution: Only suitable for 230V!
Connections low voltage:
- Temperature sensors S1 - S6
(polarity freely selectable)
- Optional additional functions Z1/Z2
D
Electrical terminals
Installation