APPENDIX
Peak-load pump 3: Activation threshold
Peak-load pump: Delay time for activation
Peak-load pump 1: Deactivation threshold
Peak-load pump 2: Deactivation threshold
Peak-load pump 3: Deactivation threshold
Peak-load pump: Delay time deactivation
System restart delay time
11.2. System impedance tables
System impedances for 3~400 V, 2-pole, direct starting
Power
System impedance
kW
ohms
2.2
0.257
2.2
0.212
2.2
0.186
2.2
0.167
3.0
0.204
3.0
0.148
3.0
0.122
3.0
0.107
4.0
0.130
4.0
0.094
4.0
0.077
5.5
0.115
5.5
0.083
5.5
0.069
7.5
0.059
7.5
0.042
9.0 – 11.0
0.037
9.0 – 11.0
0.027
15.0
0.024
15.0
0.017
System impedances for 3~400 V, 2-pole, star-delta
starting
Power
System impedance
kW
ohms
5.5
0.252
5.5
0.220
5.5
0.198
7.5
0.217
Installation and operating instructions Wilo-Control SC-L...-FTS
System impedances for 3~400 V, 2-pole, star-delta
starting
Power
9.0 – 11.0
9.0 – 11.0
9.0 – 11.0
9.0 – 11.0
Connections/h
12
18
24
30
6
12
18
24
6
12
18
6
12
18
6
12
6
12
6
12
Connections/h
18
24
30
6
System impedance
kW
ohms
7.5
0.157
7.5
0.130
7.5
0.113
0.136
0.098
0.081
0.071
15.0
0.087
15.0
0.063
15.0
0.052
15.0
0.045
18.5
0.059
18.5
0.043
18.5
0.035
22.0
0.046
22.0
0.033
22.0
0.027
11.3. Spare parts
Spare parts can be ordered from Wilo customer
service. To avoid return queries and incorrect or-
ders, the serial and/or article number must always
be supplied.
Subject to change without prior notice!
English
Connections/h
12
18
24
6
12
18
24
6
12
18
24
6
12
18
6
12
18
43