GRUNDFOS INSTRUCTIONS LC 231 Dual pump unit Installation and operating instructions
English (GB) Installation and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
English (GB) English (GB) Installation and operating instructions Original installation and operating instructions Table of contents 1. 1.1 1.2 General information . . . . . . . . . . . . . 5 Hazard statements . . . . . . . . . . . . . . 5 Notes . . . . . . . . . . . . . . . . . . . . . 5 2. 2.1 2.2 2.3 Installing the product Location . . . . . . . . Mechanical installation Electrical connection . 3. 3.1 3.2 3.3 3.4 Starting up the product . . . . . . . . . . Connecting to Grundfos GO Remote. . . .
Technical data . . . . . . . . . . . . . . . . 28 10. Disposing of the product . . . . . . . . . . 30 If these instructions are not observed, it may result in malfunction or damage to the equipment. 1. General information Read this document before you install the product. Installation and operation must comply with local regulations and accepted codes of good practice. 1.
4. To ensure that the front cover does not tilt, insert the two bottom screws into the open holes at the top of the back cover. TM071323 Place the front cover above the back cover on the support brackets. 2.2.3 Installing the control unit The product is designed to be mounted on a flat and vertical surface. The cable glands must face downwards. 1. Loosen the screws and remove the front cover. Be careful not to damage the cable between the front cover and the back cover. TM071322 2.
2.3.1 Cable requirements Use an antistatic service kit when handling electronic components. This prevents static electricity from damaging the components. 1. Loosen the screws and remove the front cover. Be careful not to damage the cable between the front cover and the back cover. DANGER Electric shock Death or serious personal injury ‐ The wires from the pump phases must be rated at 90 °C. ‐ The wires from the temperature sensor, if any, must be rated at 480 V and 70 °C. 2.
Remember to remove the jumper from the PTC terminal if you are connecting cables from the temperature sensor to the PTC terminal. WARNING Electric shock Death or serious personal injury ‐ Make sure that the voltage between the phase and neutral does not exceed 277 VAC. ‐ Electrical connections must be carried out according to wiring diagrams. The wires from the temperature sensor, if any, must be shielded. Terminal block Torque [Nm] Pump contactor 1.2 Power supply 1.
L1 L2 L3 L1 L2 L3 N N B A B EARTH A PTC2 PE PTC1 N N English (GB) • For a shielded wire, lead it through the cable clamp. T1 T2 T3 PE CIO1 TM070571 T1 T2 T3 GND M1 • For a not shielded wire, attach it to the protection cover with a cable tie.
Your device must be within reach of the product to establish Bluetooth connection. 2.2.1 Removing the front cover 3.6 Configuring the IO terminals using Grundfos GO Remote 2.3.5 Connecting an alarm device You can connect an alarm device, such as a buzzer or a lamp, to the output relays Alarm 1 and Alarm 2. The control unit triggers the alarm device when it detects an alarm or a warning. You can change the behaviour of the outputs with Grundfos GO Remote under Relay output 1 and Relay output 2.
S-1 Analog sensor S-2 Digital sensor -- A Nominal current (see the nameplate of the pump) 1Ph Single-phase 3Ph Three-phase 3.6 Configuring the IO terminals using Grundfos GO Remote The control unit is equipped with configurable input and output terminals. Using Grundfos GO Remote, you can configure the terminals for different functions, depending on the device connected to the terminals. 1. Go to Settings > LC 231 IO terminals. 2.
English (GB) defined level is reached. If the pump is placed in a well, this test may not be possible since the pump cannot empty the well. Alternatively, pull the dry-run level switch up to simulate a dry-run situation. The same can be done with a pressure level sensor. Empty 1 4. Product introduction 2 4.1 Product description 3 4 5 TM0713341 The level-control unit switches the pump on and off according to the liquid level measured by float switches or a pressure sensor.
English (GB) Fill Related information 3.3 Startup wizard on the operating panel 4.5 Terminals 1 2 3 4 TM0713351 5 1 High level 2 Stop level 3 Start level P1: start level for pump 1 4 Start level P2: start level for pump 2 5 Dry-running level In the filling application, the pump is installed in a tank or well from where it pumps the liquid. The liquid is pumped into a second tank where the level sensors are installed.
English (GB) 1 2 3 4 5 6 7 4.6 Identification 8 4.6.1 Nameplate 9 GND 10 DIO2 11 GND 12 DI1 13 GND 14 DI2 15 GND 3 Type 12 P.C. Tamb 115 200 230 460 S.N. V hp 1PH IP °C hp 3PH 16 Made in Denmark Pos. GND 24V GND 24V GND 1 TM070124 CIO2 Connect to Grundfos GO Remote to see which options are available for the input and output terminals. Pos.
Pos. Symbol Description The following Grundfos communication interface modules can be added to the product.
Description 12 Operating mode for the pump: • On: The pump has been switched on manually. • Off:1The pump has been switched off manually. • Auto: The pump is running automatically based on settings. 13 On Off Auto Display 15 Normal Alarm and warning symbol: Red: Alarm Yellow: Warning 2. Set the start level for pump 1. 4. 2 Go to Settings > Level control > Start level P2. 3 Set the start level for pump 2. 6.2.
6.3.1 Setting the stop level with Grundfos GO Remote The settings apply to analog sensors. For digital sensors, the setting is automatically activated. The stop level is the same for pump 1 and pump 2. 1. Go to Settings > Level control > Stop level 2. Set the stop level. If you are using the same level for start and stop, remember to set a stop delay. It will prevent the pump from starting and stopping too frequently. 6.3.
English (GB) 6.7.2 Setting the dry-running level with the operating panel 6.11 Signal detection time 1. Press and hold OK until the display starts flashing. The signal detection time is the minimum time a level has to be active before the control unit initiates an action, such as starting or stopping a pump. 2. Set the dry-running level using the Up or Down button. 6.11.1 Setting the signal detection time with Grundfos GO Remote 3.
1. Go to Settings > Manual start. 6.14.1 Automatic operation 2. Select Automatic return and choose one of the following options: • Disabled • Enabled. 3. Go one step back in the menu and select Return to. 4. Choose one of the following options: • Auto • Off. 5. Go one step back in the menu and select Forced start time. 6. Set the time period in which the pump must run in manual operating mode.
6.12 Setting the maximum number of restarts with Grundfos GO Remote 6.15.4 Setting the motor protection with Grundfos GO Remote 6.15.5 Trip class The trip delay indicates the maximum period of time during which the overload condition is allowed to exist within a period of 10 seconds. Y 8.9 Code 48 (Motor is overloaded) 6.15.
1000 100 Class 30 Class 20 10 Class 10 Class 5 1 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 X TM072272 0.1 CCP + Class 20 Related information 6.15.4 Setting the motor protection with Grundfos GO Remote Pos. Description Y Trip time [s] 6.16 Alarm reset X Current [A] 6.16.1 Resetting alarms and warnings manually with Grundfos GO Remote Full-load current is set to 10 [A] and trip class 20 is selected. • Motor overload.
Press Reset on the operating panel to reset the alarm or warning. together in networks and integrated in automation systems. Each device on the network must have a unique GENIbus address. GENIbus is based on the RS485 hardware standard and typically operates at a baud rate of 9600 bits/s. 6.17 Setting the buzzer with Grundfos GO Remote The internal buzzer is used to give an acoustic sound if there is a warning or an alarm. 1. Go to Settings > Buzzer settings. 6.20.
• 7.3 Replacing the CIM module DANGER Electric shock Death or serious personal injury ‐ Switch off the power supply before making any electrical connections. ‐ Make sure that the power supply cannot be switched on accidentally. Press and hold the OK button for 8 seconds until S-1 or S-2 starts flashing. Related information 3.3 Startup wizard on the operating panel 7.
English (GB) 8.1 Overview of alarm and warning codes Code number Description Code 2 The power phase is missing. Code 4 Too many motor restarts. Code 9 The power-phase sequence is wrong. Code 12 Service is needed. Code 22 Moisture in motor of pump. Code 25 Wrong configuration. Code 26 Contactor is shorted. Code 48 The motor is overloaded. Code 51 The pump is blocked. Code 57 Cause One of the power supply phases is not connected.
• • Contact Grundfos or an authorised service workshop. In order for the product to determine the service time, you must have enabled the service countdown with Grundfos GO Remote: Settings > Service. 8.9 Code 48 (Motor is overloaded) • • • Alarm code 48 is shown on the display. The alarm symbol on the display turns red and the pump stops. Alarm code Motor is overloaded is displayed in Grundfos GO Remote. Cause The pump is clogged.
English (GB) Low water level in the pit and the pump stops due to the dryrunning function. 8.15 Code 84 (Memory storage media faulty) • Check and configure the sensor for stop level. • 8.12 Code 69 (Winding temperature too high) • Cause Remedy • • Alarm code 69 is shown on the display. The alarm symbol on the display turns red and the pump stops. Alarm code Winding temperature too high is displayed in Grundfos GO Remote.
The CIM module is defective. • Related information 2.2.4 Installing a communication interface module 8.19 Code 163 (Drive unit configuration fault) • • • Related information 3.6 Configuring the IO terminals using Grundfos GO Remote Contact Grundfos. Alarm code 163 is shown on the display. The alarm symbol on the display turns red, but the pump's operating mode is unchanged. Alarm code Drive unit configuration fault is displayed in Grundfos GO Remote.
English (GB) 8.24 Code 229 (Water on floor) 9. Technical data • Voltage • 1 x 110-240 V +/-10%, PE • 3 x 200-460 V +/-10%, PE. • • Warning code 229 is shown on the display if you press the Up or Down button. The warning symbol on the display turns yellow and the pump's operating mode is unchanged. Warning code Water on floor is displayed in Grundfos GO Remote. Cause The sensor detects water on the floor. Remedy • Check for water leakage.
IEC stranded 0.75 to 2.5 mm2. IEC solid 1.0 to 4.0 mm2. UL stranded or solid AWG 18 to 12. Screw torque: 1.2 Nm. Alarm relay terminals 277 VAC nominal and 24 VDC nominal. Nominal current 10 mA to 2 A AC/DC. Pilot duty. UL: solid AWG 28 - 12, stranded AWG 30-12. IEC: solid or stranded 0.2 - 2.5 mm2. Stripping lenght: 7-8 mm. Screw torque: 0.5 Nm. Digital output mode Digital input IEC: solid or stranded 0.5 - 2.5 mm2, flexible 0.25 1.5 mm2. UL: solid or stranded AWG 28-12. Stripping length: 5-6 mm.
English (GB) Motor protection Software class B. Action type 2. Back-up fuse Maximum 35 A Measurement tolerances 24V External ± 10 %. Current measurement: ± 5 %. Power measurement: ± 10 %. Battery Size CR2032. Related information 2.3.2 Protection of controller and supply cables 7.4 Replacing the battery 10. Disposing of the product 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.
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