Grundfos CU 100, Instructions Manual, Page: 66 / 84

66
Original installation and operating instructions.
CONTENTS
Page
1. General description 66
2. Applications 66
3. Type key 66
4. Functions 66
5. Construction 67
6. Installation 69
7. Wiring diagrams 69
8. Maintenance 69
9. Fault finding chart 70
10. Technical data 70
11. Disposal 70
1. General description
The control box CU 100 is designed for the control of
small pumps.
The CU 100 is incorporated in an IP 54 plastic cabi-
net and has screwed metric cable entries.
The control box is available in several variants which
can be used for
• single-phase pumps or
• three-phase pumps
and
• start/stop by means of a float switch or
• manual start/stop.
Single-phase control boxes are supplied with capaci-
tors and with or without float switch.
Three-phase control boxes are supplied with a float
switch.
2. Applications
The control box CU 100 is designed for the starting,
operation and protection of small pumps.
• Single-phase : up to 9 amps.
• Three-phase: up to 5 amps.
See section 10. Technical data .
3. Type key
4. Functions
The control boxes CU 100 incorporate:
• an on/off switch (O/I),
• a contactor which is cut in and out by the float
switch (if installed) and/or
• a man/auto switch in the cabinet front as well as
• capacitors for single-phase variants.
During manual operation, the pump is started and
stopped by means of the man/auto switch or the
thermal relay.
Single-phase variants: The thermal relay must be
reset manually with the button in the cabinet front.
Three-phase variants: The motor starter is automati-
cally reset.
During automatic operation, the float switch will start
and stop the pump.
See the following functional block diagram.
Functional block diagram:
Fig. 1
Warning
Prior to installation, read these
installation and operating instructions.
Installation and operation must comply
with local regulations and accepted
codes of good practice.
Example CU 100 230 1 9 30/150 A
Type range
Type designation
Voltage:
230 = 230 [V]
400 = 400 [V]
Number of phases:
1 = One phase
3 = Three phases
Maximum amp. consumption for the
pump [A]
Run / starting capacitor [
μ
F]
A = with float switch
[ ] = without float switch
TM
01
1
267
4
097
Control box
Pump
Float switch
ГК Водная техника info@water-technics.ru (495) 771 72 72 www.water-technics.ru
Интернет - магазин info@wtpump.ru (499) 937 50 61 (800) 505 78 67 www.wtpump.ru