Installation
Electrical Terminals
Low voltage
max. 24 VAC / DC
Mains voltages
230 VAC 50 - 60 Hz
On the control board
VFS1
Grundfos Direct Sensor
VFS2
Grundfos Direct Sensor
CAN
CAN bus connection (1=high,2=low)
CAN
CAN bus connection (1=high,2=low)
Terminal: Connection for:
-
GND bridge on the lower ground terminal block
S1
Temperature Sensor 1
S2
Temperature Sensor 2
S3
Temperature Sensor 3
S4
Temperature Sensor 4
S5
Temperature Sensor 5
V1
0-10V / PWM signal output e.g. for controlling high-
efficiency pumps
V2
0-10V / PWM signal output e.g. for controlling high-
efficiency pumps
S6
Temperature Sensor 6 (outdoor)
+
24V Power supply
The connection of the ground wire is made at the lower gray ter-
minal block.
Terminal:
Connection for:
N
Neutral conductor N
L
Network outer conductor L
R1
Relays 1
R2
Relays 2
R3
Relays 3
R4|
Relay 4 | (potential-free contact)
R4
Relay 4 (potential-free contact)
The neutral conductor N must be connected to the N ter-
minal block.
The PE protective conductor must be connected to the PE
metal terminal block!
For high-efficiency pumps with 0-10V / PWM signal input,
the power can be provided (V1 / V2 parallel operation)
over a free relay.
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