LC A2
Installation and operating instructions
GRUNDFOS INSTRUCTIONS
English (GB) Installation and operating instructions
Caution
Note
English (GB)
Original installation and operating instructions
1. Symbols used in this document
CONTENTS
Page
1. Symbols used in this document
2. Product introduction
3. Applications
3.1 Construction
4. Installation
5. Examples of systems
6. Level switches
6.1 Float switch
6.2 Vertical level switch
7. Electrical connection
8. Technical data
9. Disposal
Warning
Prior to installation, read these installation
and operating instructions. Installation and
operation must comply with local
regulations and accepted codes of good
practice.
Warning
The use of this product requires
experience with and knowledge of the
product.
Persons with reduced physical, sensory or
mental capabilities must not use this
product, unless they are under supervision
or have been instructed in the use of the
product by a person responsible for their
safety.
Children must not use or play with this
product.
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The safety instructions in the manuals for the lifting
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station and the appliances connected must also be
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observed.
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2. Product introduction
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The LC A2 alarm device is designed for stopping
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washing machines or dishwashers to prevent
flooding.
3. Applications
The LC A2 is intended for the monitoring of pumping
stations and small lifting stations.
A level switch, installed in the appliance to be
monitored, will be activated for example in case of
overflow due to pump failure or clogging. The unit
will sound alarm and activate an integrated relay
contact to switch off the power supply to the washing
machine connected. The function, which is preset,
prevents flooding by stopping the washing machine
pump.
3.1 Construction
The LC A2 consists of a plug housing with integrated
socket. The socket can be used as power supply for
other appliances and for switching on/off appliances
in case of fault.
The unit is mains-powered by means of a
short-circuit-proof safety isolating transformer. The
voltage for the control relay (normally open contact)
is below 24 V.
The LC A2 has a potential-free signal output.
Warning
If these safety instructions are not
observed, it may result in personal injury.
If these safety instructions are not
observed, it may result in malfunction or
damage to the equipment.
Notes or instructions that make the job
easier and ensure safe operation.
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4. Installation
Caution
Caution
Warning
The protective earth (PE) of the power
outlet must be connected to the protective
earth of the product. The plug must have
the same PE connection system as the
power outlet.
Warning
The installation must be fitted with a
residual current device (RCD) with a
tripping current less than 30 mA.
Warning
The product must be connected to an
external main switch with a minimum
contact gap of 3 mm (0.12 inch) in all
poles.
Warning
Unplug the unit before opening it.
1. Install the level switch. See examples on page 6.
2. Remove the four screws at the back of the LC A2
and lift off the cover carefully.
3. Disconnect wires, if any, to the buzzer.
4. Remove the cover.
5. Lead the level switch cable through a suitable
cable gland and connect the conductors to the
terminal block.
6. Tighten the cable gland by hand.
7. Follow the same procedure for the alarm relay.
8. Connect the buzzer by means of the connector.
9. Fit the cover.
Make sure that wires are not pinched.
10. Fit and tighten the four screws.
6. Level switches
6.1 Float switch
Float switch, type MS2, for installation in tanks and
pits. It is especially suitable for Liftaway B, Liftaway
C 100, Unilift and PUST.
Fig. 1 Float switch
91427145: Float switch with 5 m cable.
91427146: Float switch with 10 m cable.
91427147: Float switch with 20 m cable.
6.2 Vertical level switch
Level switch for installation in the cover of small
lifting stations and tanks. It is especially suitable for
Sololift2 C-3, Sololift+ C-3 and Liftaway C.
Fig. 2 Vertical level switch
97775337: Vertical float switch with 10 m cable.
English (GB)
TM01 6982 3999TM05 0630 1311
5. Examples of systems
See page 6.
Observe limitations, if any, in the use of
pumps or lifting stations.
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