Grundfos LC 115 Series User manual

LC, LCD 115
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
Page
1. Symbols used in this document
2. Introduction
You can find these instructions in other languages by using the
QR code or link below.
grundfos.com/LCLCD115-manual
2.1 Product description
The LC, LCD 115 controller is designed for the control of one or
two pumps in wastewater and drainage systems.
It automatically starts/stops pumps and generates alarms based
on signals from an analog level sensor in the pump pit.
The controller can be set to three modes:
• starting unit
• starting unit with alternation
• level converter.
2.2 Features
• Control of one or two pumps based on analog level
measurement
• indication of liquid level
• alarm indications:
– high liquid level via level sensor
– high liquid level via float switch (optional)
– overload (via motor protection relay)
– overtemperature (via PTC resistance or thermal switch in
motor)
• buzzer alarm (optional)
• automatic alarm resetting
• automatic restarting after stop due to overtemperature.
2.3 Identification
The controller type, voltage variant, etc. are stated on the
nameplate on the side of the controller cabinet.
2.4 Requirements
Level sensor
Type: 2-wire screened cable.
Output signal: 4-20 mA.
Sensor supply: 24 VDC (+ 5/- 15 %).
Maximum cable length: 30 m.
Pit
The liquid level of the pit must not exceed 10 m, which is the
maximum capacity of the sensor.
1. Symbols used in this document 2
2. Introduction 2
2.1 Product description 2
2.2 Features 2
2.3 Identification 2
2.4 Requirements 2
3. Product overview 3
3.1 Controller cabinet 3
3.2 Terminal block 3
4. Installation 4
4.1 Location 4
4.2 Mounting the cabinet 4
4.3 Connecting the cabinet 4
5. Choosing the mode 6
5.1 Starting unit 6
5.2 Starting unit with alternation (LCD only) 6
5.3 Level converter 6
6. Reading the display 6
7. Configuring the controller 6
8. Maintenance 8
9. Technical data 8
10. Fault finding 9
11. Disposal 9
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
If these safety instructions are not observed,
it may result in personal injury.
Warning
If these instructions are not observed, it may lead
to electric shock with consequent risk of serious
personal injury or death.
Warning
These instructions must be observed for
explosion-proof pumps. We recommend that you
also follow these instructions for standard
pumps.
Caution
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment.
Note
Notes or instructions that make the job easier
and ensure safe operation.
TM06 3679 0815
Example LC 115. 230. 1. 12. DOL
LC:
LCD:
one-pump controller
two-pump controller
115: type designation
Phase voltage [V]
1:
3:
single-phase
three-phase
Maximum operating current per pump [A]
DOL:
SS:
40:
40/150:
direct on line
soft starter
run capacitor
run and starting capacitor

English (GB)
3
3. Product overview
3.1 Controller cabinet
Fig. 1 Internal construction of the LCD 115, 12-23A, DOL
3.2 Terminal block
Fig. 2 Terminal block for sensor and alarm devices (LCD)
TM06 2742 4614
Pos. Description
1 CU 215 module
2 Terminal block for sensor and alarm devices. See fig. 2.
3 High-level relay
4 Contactor
5 Overload relay. Only DOL.
6 Terminal block for power supply
7Fuse holders for control circuit fuses (1 to 3 depending
on current/voltage variant)
8 Isolation transformer
9 Earth bar
10 Cable glands
11 Holes for mounting screws
PE
254
354
42
7
6
8
9
5
10
11
6
1
3
TM06 1921 3314
Pos. Description
1-2-3 Output for external high-level alarm device (NO-NC)
T11-T21 Input for motor PTC resistance/thermal switch
T12-T22 Input for second motor PTC resistance/thermal
switch. Only LCD.
lo-Ub Input for analog level sensor. Ub delivers a 24 VDC
voltage to the CU 215.
4-5 Output for external overtemperature alarm device
(NO)
41-42 Input for high-level float switch (optional)
T11 T21
T22T12 Ub
5
Io
4
4241
3
2
1

English (GB)
4
4. Installation
The installation must be carried out by authorised staff in
accordance with local regulations.
4.1 Location
The controller can be installed at ambient temperatures from
-20 to 50 °C.
When installed outdoors, the controller must be placed in a
protective shed or cupboard. It must not be exposed to direct
sunlight.
The maximum length of the sensor cable is 30 m.
4.2 Mounting the cabinet
1. Remove the transport protectors, if any, from inside the
cabinet.
2. Mount the cabinet on a plane wall with screws through the
mounting holes. See fig. 1.
4.3 Connecting the cabinet
Connect the following devices to the controller:
• Level sensor. See fig. 3.
• Power supply. See fig. 4.
• Pump(s). See fig. 4.
Optional:
• Overtemperature protection. See fig. 3.
• High-level float switch. See fig. 3.
• External high-level alarm device. See fig. 3.
• External overtemperature alarm device. See fig. 3.
See also the wiring diagram delivered with the product.
Fig. 3 Connecting sensor and alarm devices
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.
Warning
Before making any connections in the controller
or work on pumps, pits, etc., switch off the power
supply. Make sure that it cannot be accidentally
switched on.
Warning
In potentially explosive areas, the float switch, if
any, must be connected via an Ex-barrier, e.g.
Grundfos LC-Ex4 Zener barrier (No. 96440300).
Use only float switches approved for use in
potentially explosive areas.
Install the controller and the Ex-barrier outside
the potentially explosive area.
Note
The cable glands must point downwards.
Fit additional cable glands to the base of the
cabinet, if necessary.
Caution
Make sure that a 250 mA backup fuse is installed
in the fuse holder. See pos. 6 in fig. 1.
Note
Connect the screen of the conductor from the
level sensor via a metal bracket to the earthed
metal backplate of the cabinet.
TM06 2108 3714
M1 M2
3 - NC T21
2 - NO T11
T22
T12
5
4
Ub
Io
42
41
1 - COM
4-20
mA
PE
LNLN

English (GB)
5
The following diagrams show how to connect motors and power
supply to the DOL and SS versions. For other versions, please
refer to the wiring diagram delivered with the product.
Fig. 4 Connecting motor and power supply for DOL and SS versions
DOL, single-phase DOL, three-phase
TM06 2126 3714 TM06 2127 3714
SS, single-phase SS, three-phase
TM06 2651 4514 TM06 2652 4514
PE
1U2 1N2 2U2 2N2
U1 N1
LNPE
T12 T22
T11 T21
1~
NL3L1 L2
T12 T22T11 T21
3~
PE
PE
W1
V1
U1 N1
1U2 1V2 1W2 2U2 2V2 2W2
PE
T12 T22
T11 T21
1~
LNPE
1U2 1N2 2U2 2N2
U1 N1
1U2 1V2 1W2 2U2 2V2 2W2
W1 V1 U1 N1
L3 NL1 L2
T12 T22T11 T21
3~
PE
PE

English (GB)
6
5. Choosing the mode
The controller can be set to three modes:
– starting unit
– starting unit with alternation
– level converter.
In an application with pumps, we recommend that you use a
starting unit or starting unit with alternation.
5.1 Starting unit
The controller converts the analog signal from the level sensor
into digital signals. This enables start/stop of the pump at two
setpoints and activation of high-level alarm.
This is the usual setting for a pit with heavy and random flow
intake.
5.2 Starting unit with alternation (LCD only)
The controller enables start/stop of the two pumps alternately.
This mode is ideal for a pit with slow water intake.
5.3 Level converter
The same setpoint is used for start and stop. We do not
recommend this mode in an application with pumps.
6. Reading the display
Fig. 5 Display of the CU 215
When the controller is connected to the power supply and
properly connected to the level sensor, the CU 215 module shows
the liquid level.
If the level sensor is not properly connected, the display will show
"---".
The four orange light diodes correspond to four configurable relay
outputs: S1, S2, S3 and S4. Each of them corresponds to a liquid
level. See table below.
7. Configuring the controller
The following parameters can be set:
• Mode:
– starting unit
– starting unit with alternation
– level converter.
• Range of the level sensor (liquid level in metres corresponding
to 20 mA).
• Setpoints S1, S2, S3 and S4.
1. Scroll through the parameters using the up and down buttons
on the display.
2. To change a parameter, press [ ●] for eight seconds. The first
digit flashes and can be changed.
3. Press the button again to select the next digit.
4. When you have selected the last digit, press the button again.
The display will cease to flash, and the parameter has been
changed.
Reactions if none of the buttons are pressed for eight seconds:
• When scrolling through the parameters:
The display reverts to its original state, and the diodes revert
to the normal displaying of the liquid level.
• When changing a parameter:
The parameter is set to the actual value shown in the display,
and the display ceases to flash.
Setting the mode
Setting the range
TM06 2104 3714
LED Colour Description
Green The CU 215 is functioning
normally.
Orange Output S4 is activated. The level
is higher than setpoint S4.
Orange Output S3 is activated. The level
is higher than setpoint S3.
Orange Output S2 is activated. The level
is higher than setpoint S2.
Orange Output S1 is activated. The level
is higher than setpoint S1.
LED Indicator Description
All LEDs
on.
LvL: Level converter.
StA: Starting unit.
S.t.A.: Starting unit with alternation of
pump 1 and 2. Only LCD.
LED Description
LED 1
and 2 on.
Range of the level sensor (liquid level
in metres corresponding to 20 mA).
Max. 10 m.

English (GB)
7
Setting the setpoints
Starting unit
LED Indicator Description
LED 1 on. S1: Start level of pump 1.
Must be ≤S2.
LED 1
flashing.
S1: Stop level of pump 1.
Must be ≤S1.
LED 2 on.
S2: Start level of pump 2.
Must be ≤S3.
Only LCD.
LED 2
flashing.
S2: Stop level of pump 2.
Must be ≤S2.
Only LCD.
LED 3 on. S3: High-level alarm 1.
Must be ≤S4.
LED 4 on. S4: High-level alarm 2.
Note
In starting unit mode, we recommend that you set
the stop level below the start level. It will prevent
frequent starts/stops of the pump.
Note
If you attempt to change a parameter to an invalid
value, for example 99.0 in the level sensor range,
the parameter reverts to its original value when
the display ceases to flash.
Level converter
LED Indicator Description
LED 1 on. S1: Start and stop level of pump 1.
Must be ≤S2.
LED 2 on.
S2: Start and stop level of pump 2.
Must be ≤S3.
Only LCD.
LED 3 on. S3: High-level alarm 1.
Must be ≤S4.
LED 4 on. S4: High-level alarm 2.

English (GB)
8
8. Maintenance
We recommend that you carry out minor checks of the controller,
pump pits, tanks, pumps, etc. at regular intervals.
These checks must be carried out by authorised staff.
• Check the gaskets of the cable glands and on the front of the
cabinet.
• Check for possible deposits/sludge build-up in the pump pit/
tank. Sludge may settle in areas with almost stagnant liquid.
• Check for possible blockage on the inlet side of the pump.
A blockage will typically be a large solid object.
• If the controller has been installed in a particularly aggressive
environment, we recommend that you 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.
9. Technical data
Voltage variants, rated voltages
• 1 x 230 V.
• 3 x 230/400 V.
Voltage tolerances
- 15 %/+ 10 % of rated voltage.
See also installation and operating instructions for the pump in
question.
Mains frequency
50/60 Hz.
See also installation and operating instructions for the pump in
question.
Supply system earthing
For TN systems and TT systems.
Short-circuit protection of power supply
Depending on variant. See nameplate.
Ambient temperature
• During operation: -20 - 50 °C (must not be exposed to direct
sunlight).
• In stock: -30 - 60 °C.
Enclosure class
IP65.
EMC (electromagnetic compatibility)
According to EN 61 000-6-2 and EN 61 000-6-3.
Material
ABS (acrylonitrile butadiene styrene).
Weight
Depending on variant. See nameplate.
Dimensions including cable glands
• LC, LCD 115 1-23A DOL: 410 x 280 x 150 mm.
• LC, LCD 115 9.2-25A SS: 410 x 280 x 150 mm.
• LC 115 14-43A SS: 600 x 280 x 195 mm.
• LCD 115 14-43A SS: 600 x 500 x 210 mm.
• LC, LCD 115 12A 40: 600 x 280 x 150 mm.
• LC, LCD 115 12A 40/150: 600 x 280 x 150 mm.
Outputs for alarm devices
Max. 230 VAC / max. 2 A / min. 10 mA / AC1.
Accuracy of sensor/controller
• ± 0.3 % of range, ± 1 digit.
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.
Warning
Before making any connections in the controller
or work on pumps, pits, etc., switch off the power
supply. Make sure that it cannot be accidentally
switched on.
Note
The above list is not complete. The controller
may be installed in systems, installations and/or
environments which require thorough and
regular maintenance.

English (GB)
9
10. Fault finding
See also installation and operating instructions for the pump in
question.
11. 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.
Warning
Before making any connections in the controller
or work on pumps, pits, etc., switch off the power
supply. Make sure that it cannot be accidentally
switched on.
Fault Cause Remedy
1. The pump does not run
even though the liquid level
is higher than the start level
of the pump.
a) No power supply. None of the indicator lights
are on.
Switch on the power supply.
b) Control circuit fuses are blown. Check and eliminate the cause. Replace the
control circuit fuses. See pos. 6 in fig. 1.
c) The motor protection relay has cut out the
pump.
Check the pump/pit.
d) The PTC resistance/thermal switch has cut
out the pump.
Allow the pump to cool. The pump will restart
automatically according the signal from the level
sensor.
e) An external alarm device, if any, is activated.
f) The control circuit for the motor protection
relay has been broken or fails.
Check the control circuit.
g) Motor/supply cable is defective. Check motor and cable.
h) The level sensor is defective. Check level sensor and cable.
i) The CU 215 module is defective. Replace the module.
2. The pump is starting/
stopping too frequently.
a) The level sensor is defective. Check level sensor and cable.

Declaration of conformity
10
Declaration of conformity 1
GB: EC declaration of conformity
We, Grundfos, declare under our sole responsibility
that the product LC, LCD 115, to which this
declaration relates, is in conformity with these
Council directives on the approximation of the laws
of the EC member states:
DK: EF-
overensstemmelseserklæring
Vi, Grundfos, erklærer under ansvar at produktet
LC, LCD 115 som denne erklæring omhandler, er i
overensstemmelse med disse af Rådets direktiver
om indbyrdes tilnærmelse til EF-medlemsstaternes
lovgivning:
DE: EG-Konformitätserklärung
Wir, Grundfos, erklären in alleiniger Verantwortung,
dass das Produkt LC, LCD 115, auf das sich diese
Erklärung bezieht, mit den folgenden Richtlinien
des Rates zur Angleichung der Rechtsvorschriften
der EU-Mitgliedsstaaten übereinstimmt:
GR: ∆ήλωση συμμόρφωσης EC
Εμείς, ηGrundfos, δηλώνουμε με αποκλειστικά
δική μας ευθύνη ότι τα προϊόντα LC, LCD 115, στα
οποία αναφέρεται ηπαρούσα δήλωση,
συμμορφώνονται με τις εξής Οδηγίες του
Συμβουλίου περί προσέγγισης των νομοθεσιών
των κρατών μελών της ΕΕ:
ES: Declaración CE de
conformidad
Nosotros, Grundfos, declaramos bajo nuestra
propia responsabilidad que el producto LC, LCD
115, al cual se refiere esta declaración, está
conforme con las Directivas del Consejo en la
aproximación de las leyes de los Estados
Miembros del EM:
IT: Dichiarazione di conformità CE
Grundfos dichiara sotto la sua esclusiva
responsabilità che il prodotto LC, LCD 115, al quale
si riferisce questa dichiarazione, è conforme alle
seguenti direttive del Consiglio riguardanti il
riavvicinamento delle legislazioni degli Stati membri
CE:
HU: EK megfelelőségi nyilatkozat
Mi, a Grundfos, egyedüli felelősséggel kijelentjük,
hogy a LC, LCD 115 termék, amelyre jelen
nyilatkozik vonatkozik, megfelel az Európai Unió
tagállamainak jogi irányelveit összehangoló tanács
alábbi előírásainak:
NL: EC
overeenkomstigheidsverklarin
g
Wij, Grundfos, verklaren geheel onder eigen
verantwoordelijkheid dat het product LC, LCD 115
waarop deze verklaring betrekking heeft, in
overeenstemming is met de Richtlijnen van de
Raad in zake de onderlinge aanpassing van de
wetgeving van de EG lidstaten betreffende:
PL: Deklaracja zgodności WE
My, Grundfos, oświadczamy z pełną
odpowiedzialnością, że nasze wyroby LC, LCD
115, których deklaracja niniejsza dotyczy, są
zgodne z następującymi wytycznymi Rady d/s
ujednolicenia przepisów prawnych krajów
członkowskich WE:
RU: Декларация осоответствии
ЕС
Мы, компания Grundfos, со всей
ответственностью заявляем, что изделия LC,
LCD 115, ккоторым относится настоящая
декларация, соответствуют следующим
Директивам Совета Евросоюза об унификации
законодательных предписаний стран-членов ЕС:
FI: EY-
vaatimustenmukaisuusvakuut
us
Me, Grundfos, vakuutamme omalla vastuullamme,
että tuote
LC, LCD 115, jota tämä vakuutus koskee, on EY:n
jäsenvaltioiden lainsäädännön
yhdenmukaistamiseen tähtäävien Euroopan
neuvoston direktiivien vaatimusten mukainen
seuraavasti:
SE: EG-försäkran om
överensstämmelse
Vi, Grundfos, försäkrar under ansvar att produkten
LC, LCD 115, som omfattas av denna försäkran, är
i överensstämmelse med rådets direktiv om
inbördes närmande till EU-medlemsstaternas
lagstiftning, avseende: