Grundfos LS Installation And Operating Instructions Manual
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Grundfos LS Installation And Operating Instructions Manual

Smaller models, flow range up to 3000 m³/h
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GRUNDFOS INSTRUCTIONS
LS
Smaller models, flow range up to 3000 m³/h
Installation and operating instructions

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Summary of Contents for Grundfos LS

  • Page 1 GRUNDFOS INSTRUCTIONS Smaller models, flow range up to 3000 m³/h Installation and operating instructions...
  • Page 3 English (GB) Installation and operating instructions ........4...

  • Page 4: Table Of Contents

    English (GB) Installation and operating instructions Original installation and operating instructions Technical data ....43 Operating conditions ... . . 43 Table of contents Flange forces and torques .

  • Page 5: General Information

    A blue or grey circle with a white graphical These instructions apply to both types. symbol indicates that an action must be The LS pump can be driven by an electric motor or taken. another type of driver. In the following we assume that the pump is driven by an electric motor.

  • Page 6: Receiving The Product

    Grundfos' representative and the carrier's agent at once. LS pump with accessibility for inspection and Bolts for LS bare shaft pumps have US headroom for the use of an overhead crane threads for which inch tools are required. Bolts for coupling guard and for mounting...
  • Page 7 At flow velocities greater than 2.4 m/s, we recommend that you fit larger expansion joints matching the pipes. How to lift and handle the LS bare shaft pumps 3.2.2 Foundation We recommend that you install the pump on a concrete foundation, which is heavy enough to provide permanent and rigid support for the entire pump.
  • Page 8 3.2.5 Foundation and preliminary alignment Let the foundation cure for several days before the base frame is shimmed and grouted. The foundation and preliminary alignment procedure has four steps: Shimming of base frame 1. pouring of foundation 2. shimming of base frame 3.
  • Page 9 3.2.5.1 Preliminary alignment 3.2.5.2 Spacer coupling installation Preparation DANGER Electric shock • Check the spacer coupling for possible transport Death or serious personal injury damage and missing parts. Clean the spacer ‐ coupling components. Before starting work on the pump, make sure that the power supply has •...
  • Page 10 F meets the dimension Ls in the assembly drawing, Ls is the distance between pump shaft end and motor shaft end. The deviation should be from 0 mm to 0.4 mm.
  • Page 11 7. Turn the motor for two or three rounds slowly. Dial indication Make sure it can rotates freely. Type End face Radial (mm) Accepted misalignment (mm） Accepted misalignment is usually provided by device TD (P) 8-8400 0.35 0.35 manufacturer. Refer to table below for the deviations TD (P) 8-9011 0.35 0.35...
  • Page 12 3.2.5.3 Grouting 3.2.6 Installing coupling guard Grouting compensates for uneven foundation, 1. Align the notch of coupling guard and the distributes the weight of the unit, dampens vibrations lubricating nipple (2). Then install the coupling and prevents shifting. Use an approved, non- guard (4) to the outer ring of the bearing housing shrinking grout.
  • Page 13 (4) and supporting foot (7) via bolts (9) (10). guard and motor cover. The fixing ring of pre-installation is only used in LS 1000-700-X. Align the the notch of fixing ring with lubricating nipple and install the coupling guard to fixing...

  • Page 14: Electrical Connection

    3.3 Electrical connection 3.3.1 Frequency converter operation You can connect all three-phase motors to a The electrical connections must be carried out by an frequency converter. authorised electrician in accordance with local regulations. However, frequency converter operation often exposes the motor insulation system to a heavier load DANGER and causes the motor to be more noisy than usual Electric shock...

  • Page 15: Pipes

    3.4 Pipes 3.4.2 Inlet pipes Place the pump below system liquid level whenever Protective covers are fitted to the inlet and possible. This will facilitate priming, assure a steady outlet ports to prevent foreign bodies from liquid flow and provide a positive suction head. entering the pump during transportation and installation.
  • Page 16 3.4.5 Auxiliary pipes Drains Install the drain pipes from the pump casing and stuffing boxes to a convenient disposal point. Flushing pipes • Pumps fitted with stuffing boxes When the inlet pressure is below the ambient pressure, supply the stuffing boxes with liquid to provide lubrication and prevent the ingress of air.

  • Page 17: Inlet Pipe Guidelines

    3.5 Inlet pipe guidelines 3.5.2 Flooded systems Closed systems and open systems where the liquid 3.5.1 Common guidelines level is above the pump inlet. Avoid air pockets or turbulence in the inlet pipe Never use reducers in a horizontal inlet pipe as Correct shown in figure Reducers resulting in air pockets and turbulence.
  • Page 18 Wrong Wrong Inlet pipe resulting in air pockets Inlet pipe resulting in air pockets Pos. Description Pos. Description Eccentric reducer Eccentric reducer Air pocket Air pocket 3.5.5 Inlet pipe with a horizontal elbow in the feed Pipe sloping down towards pump line Make sure that the liquid flow is evenly distributed to 3.5.4 Inlet pipe if the feed line comes in different...
  • Page 19 Correct Wrong Unbalanced loading of a double-suction impeller due to uneven flow through a horizontal elbow close to the pump Pos. Description Uneven flow Water pressure increases here causing a greater flow to one side of the impeller than to the other 3.5.6 Installations with vertical inlet pipe in confined space Recommended inlet pipe installation with a length...

  • Page 20: Starting Up The Product

    4. Starting up the product 4.2 Prestart checks Prestart checks have four steps: 4.1 General information 1. Bearings 2. Stuffing boxes Do not start the pump until it has been filled with liquid and vented. 3. Pressure gauge 4. Direction of rotation. CAUTION 4.2.1 Bearings Biological hazard...

  • Page 21: Priming

    4.3 Priming 4. Rotate the shaft by hand, if possible, while priming and venting to free entrapped air from the impeller channels. If not primed properly, the pump will not 5. Tighten the vent screw and completely open the deliver liquid. isolating or throttle valve(s).

  • Page 22: Startup

    4.4 Startup 3. Remove the coupling guard. 4. Check the alignment on the coupling by means of Make sure that the pump is filled with ruler or dial gauges or laser. liquid. The pump must not run dry. Dry- running will cause serious damage to the stuffing boxes, shaft seals, wear rings and The coupling tolerances may differ from shaft sleeves.
  • Page 23 4.5.1 Aligning the pump and motor with a 4. Turn the coupling 90°, and repeat the straightedge ruler measurement with straightedge and feeler gauge. 1. Make a rough alignment of pump and motor, and tighten the screws in the base frame to the correct torque.
  • Page 24 8. Check the gap S2 both vertically and horizontally. 3. Fasten a dial indicator to the hub of coupling guard, make sure the dial indicator is on the outer circumference of coupling guard. • If the air-gap width is within the tolerances, the alignment is complete.
  • Page 25 5. Adjust the position of the motor. Loosen the Related information screws that hold the motor in place. 4.5.4 Tightening torques 4.5.5 Pin coupling air-gap width S2 6. Insert shims with the required thickness. 7. Tighten the screws to the correct torque. Go to step 3, and check the alignment once more.
  • Page 26 4.5.3 Aligning the pump and motor with a laser equipment 1. Make a rough alignment of pump and motor, and tighten the screws in the base frame to the correct torque. 5. Interconnect the laser units, and connect one laser unit to the control box. See the table Tightening torques.
  • Page 27 8. Enter the distance. 13. Measure the distance from the S unit to the rear screw on the motor. 9. Measure the distance between the S unit and the centre of the gap between the couplings. 14. The control box shows that the laser units must be turned to position 9 o'clock.
  • Page 28 16. Confirm on the control box. 20. Loosen the screws that hold the motor in place. Adjust the position of the motor. 17. Turn the laser units to position 12 o'clock. Confirm on the control box. 21. Insert shims with the required thickness. 18.
  • Page 29 4.8 mm 0/-1 306-757 6.4 mm 0/-1 If the coupling and motor are not supplied by Grundfos, make sure to follow the coupling manufacturer’s instructions. WARNING See the table Air-gap width S2. Crushing of hands Death or serious personal injury Related information ‐...

  • Page 30: Product Introduction

    5.1 Applications Grundfos horizontal split case pumps are stated on the nameplate. The type designation includes model Grundfos LS horizontal split case pumps are typically number, size and type. used in these applications: Permanent records for this pump are kept under its •...
  • Page 31 ACS or WARS certified pump Pump variant 1: Grease-lubrication For LS, pump with motor, common base frame and non-spacer coupling For LSV, pump with motor, base frame, motor stool and non-spacer coupling 2: Grease-lubrication For LS, bare shaft pump with common base frame, non-spacer coupling...
  • Page 32 Pos. Code Explanation Pipe connection F1: 10 bar, DIN PN 10 G1: 175PSI(12 bar), ANSI125LB/150LB F2: 16 bar, DIN PN 16 G2: 250PSI(17.2 bar), ANSI250LB/300LB F3: 25 bar, DIN PN 25 G3: 400PSI(27.6 bar), ANSI250LB/300LB XX: Special flange B: SS420 and bronze Code for shaft and sleeve materials A: SS420 and SS304 D: SS420 and no sleeve...
  • Page 33 2 Counterclockwise Antimony, not approved for potable water. The example shown is an LS 125-100-305F/273.1, standard type with standard coupling, DIN PN 16 flange, cast iron pump casing with SS304 impeller, BBQE mechanical shaft seal and clockwise direction of rotation.

  • Page 34: Servicing The Product

    Electric shock toxic. Death or serious personal injury If you request Grundfos to service the product, ‐ Before starting work on the pump, contact Grundfos with details about the liquid before make sure that the power supply has returning the product for service.
  • Page 35 6.3.3 Lubrication • Visually check for leaks. • Check for vibrations. Pump bearings • Hand test the bearing housing for Re-greaseable bearings are packed with grease at Every any signs of temperature rise. our factory prior to shipping. The initial filling of week •...

  • Page 36: Taking The Product Out Of Operation

    2. Switch off the power supply to the motor. Texaco Polystar RB Related information 7.2 Long-term shutdown Grundfos recommends KYODO YUSHI MULTEMP SRL grease for relubrication. 7.1 Short-term shutdown Motor bearings 1. For overnight or temporary shutdown periods Lubricate the motor bearings in accordance with the under non-freezing conditions, the pump may indications on the motor nameplate.
  • Page 37 Example of drain plugs Pos. Description Drain plug, inlet port Drain plug, pump casing and outlet port WARNING Harm to health Death or serious personal injury ‐ Do not use antifreeze solution if you use the pump for public or potable-water supply.

  • Page 38: Fault Finding The Product

    8. Fault finding the product DANGER Electric shock Death or serious personal injury ‐ Before you remove the terminal box cover and before you remove or dismantle the pump, make sure that the power supply has been switched off and that it cannot be accidentally switched on. 8.1 The pump delivers no liquid Cause Remedy...

  • Page 39: The Pump Does Not Create Enough Pressure

    Replace the packing rings. The impeller diameter is too small. • Check with Grundfos if you can use a larger impeller. If not, reduce the outlet pipe friction losses. But be careful not to overload the motor. Obstruction in pump housing.

  • Page 40: The Pump Loses Liquid After Running For A Short Time

    The viscosity or specific gravity of the pumped liquid • Use a larger motor. Consult Grundfos for is higher than that of water. recommended size. •...

  • Page 41: The Motor Is Overloaded

    8.6 The motor is overloaded Cause Remedy The viscosity or specific gravity of the pumped liquid • Use a larger motor. Consult Grundfos for is higher than that of water. recommended size. • Test the liquid for viscosity and specific gravity.

  • Page 42: Cavitation Noise

    Cause Remedy • Retighten the anchor bolt nuts. Make sure that the foundation is made according to the installation and operating instructions. 8.8 Cavitation noise Cause Remedy Air leak in the inlet pipe or flange. • Replace or repair the defective pipe section or flange.

  • Page 43: Original Installation And Operating Instructions 9. Technical Data

    NPSH curve for the pump + a safety margin of output. minimum 0.5 metres head. In cases where both the maximum temperature and NPSH appears from the data booklet and Grundfos the maximum altitude are exceeded, the derating Product Centre. factors must be multiplied (0.88 x 0.78 = 0.69).
  • Page 44 This will result in overheating of the motor. In such situations, throttle the valve on the outlet side instead. If an automatic throttle valve is installed, this can be done automatically. 9.1.5 Frequency of starts and stops The recommended maximum number of starts is 3 per hour for complete pumps with a motor supplied by Grundfos.

  • Page 45: Flange Forces And Torques

    9.2 Flange forces and torques Horizontal pump, side branch, y-axis If not all loads reach the maximum permissible value, one of the values is allowed to exceed the normal limit. Contact Grundfos for further information. Flange forces and torques Force [N] Torque [Nm]...

  • Page 46: Disposing Of The Product

    1. Use the public or private waste collection service. 2. If this is not possible, contact the nearest Grundfos company or service workshop. The crossed-out wheelie bin symbol on a product means that it must be disposed of separately from household waste.
  • Page 47 Argentina Columbia Hong Kong Bombas GRUNDFOS de Argentina S.A. GRUNDFOS Colombia S.A.S. GRUNDFOS Pumps (Hong Kong) Ltd. Ruta Panamericana km. 37.500industin Km 1.5 vía Siberia-Cota Conj. Potrero Unit 1, Ground floor, Siu Wai industrial 1619 - Garín Pcia. de B.A.
  • Page 48 Lithuania Serbia Turkey GRUNDFOS Pumps UAB Grundfos Srbija d.o.o. GRUNDFOS POMPA San. ve Tic. Ltd. Smolensko g. 6 Omladinskih brigada 90b Sti. LT-03201 Vilnius 11070 Novi Beograd Gebze Organize Sanayi Bölgesi Tel.: + 370 52 395 430 Tel.: +381 11 2258 740...
  • Page 49 99212774 04.2024 ECM: 1392621 www.grundfos.com...

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