Grundfos LC 107

English (GB)
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7. Maintenance
During normal application and operation, the controller LC/D 107
is maintenance-free.
However, it is advisable to carry out minor checks of the
LC/D 107 controller, pump pits, tanks, pumps, etc. at suitable
intervals. These checks should be carried out by authorized
personnel.
The checks should include the following among other things:
• Check the gaskets of the LC/D 107 cabinet front and those of
the Pg cable entries.
• Check the cable entries for the explosion hazard area.
• Check for possible deposits/sludge build-up in the pump pit/
tank. Sludge may settle in areas with almost stagnant liquid.
• Check for beginning sludge build-up around the level pickups.
• Check for possible blockage/leaks in the pneumatic tube
between the level pickup and the LC/D 107.
• Check for possible blockage on the suction side of the
pump(s). A blockage will typically be a large solid object.
• If the LC/D 107 has been installed in a particularly aggressive
environment, it is advisable to check the motor protection
contacts in order to identify possible chemical attack resulting
in corrosion. In typical installations, the motor protection
contacts will work for several years and do not require any
inspection.
Note: The list above is not complete. LC/D 107 may be installed
in systems, installations and/or environments which require
thorough and regular maintenance.
8. Technical data
Voltage variants, nominal voltages
• 1 x 230 V.
• 3 x 400 V.
Voltage tolerances for LC/D 107
- 15 %/+ 10 % of nominal voltage.
See also installation and operating instructions for the pump in
question.
Mains frequency for LC/D 107
50/60 Hz.
See also installation and operating instructions for the pump in
question.
Supply system earthing
For TN systems and TT systems.
Rated insulation voltage, U
i
4 kV.
Rated impulse withstand voltage, U
imp
4 kV.
Back-up fuse
Depending on variant, see nameplate.
Control circuit fuse
Fine-wire fuse: 250 mA / F / 32 mm x ∅6 mm.
Ambient temperature
• During operation: -30 to +50 °C
(must not be exposed to direct sunlight).
• In stock: -30 to +60 °C.
Enclosure class
IP65.
EMC (electromagnetic compatibility)
According to EN 61 000-6-2 and EN 61 000-6-3.
Pneumatic tubes
• Maximum 20 m per pneumatic tube
(standard: pneumatic tube of 10 metres).
• Diameter: 10 mm.
•Material: PA 11.
Cabinet of LC/D 107
• External dimensions:
Height = 410 mm, width = 278 mm, depth = 150 mm.
• Material: ABS (Acrylonitrile butadiene styrene)
• Weight: Depending on variant, see nameplate.
Outputs for alarm devices
Max. 230 VAC / max. 2 A / min. 10 mA / AC1.
9. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.
Subject to alterations.
Warning
Before starting any work on pumps used to pump
liquids which could be constituted as being
hazardous to health, thorough cleaning/venting of
pumps, pits, etc. must be carried out according to
local regulations.
Before making any connections in the LC/D 107 or
work on pumps, pits, etc., it must be ensured that the
electricity supply has been switched off and that it
cannot be accidentally switched on.