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Summary of Contents for Grundfos LF
- Page 1 GRUNDFOS INSTRUCTIONS LC, LCV, LF, LCS End-suction centrifugal pumps Installation and operating instructions...
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Page 3: Table Of Contents
English (US) Installation and operating instructions Original installation and operating instructions Prior to installation, read these installation and These installation and operating instructions describe LC, LCV, operating instructions. Installation and operation LF, and LCS pumps. must comply with local regulations and accepted Sections 1-6 give the information necessary to be able to unpack, codes of good practice. -
Page 4: Limited Warranty
1. Limited warranty 2. General information New equipment manufactured by seller or service supplied by 2.1 Symbols used in this document seller is warranted to be free from defects in material and workmanship under normal use and service for a minimum of DANGER twelve (12) months from date of installation, eighteen (18) months from date of shipment, unless otherwise stated in product warranty... -
Page 5: Receiving The Product
• LC and LCV pumps do not need to be grouted. Install the pump permanently on a firm, raised concrete foundation of sufficient size to dampen any vibration and prevent any deflection or shaft misalignment. The foundation may float on springs or be a raised part of the floor. -
Page 6: Securing The Base Plate
4.3 Securing the base plate 4.4 Mechanical installation When the raised concrete foundation has been poured and 4.4.1 Piping allowed to set, proceed as follows: 1. Lower the base plate over the anchor bolts and rest it on loose Do not let the pump support the pipes. Use pipe adjustment wedges or shims placed near each anchor bolt hangers or other supports at proper intervals to and at intervals not exceeding 24 in. - Page 7 4.4.3 Outlet pipe • A short outlet pipe can be the same diameter as the pump At no point must the diameter of the inlet pipe be outlet port. A long outlet pipe must be one or two sizes larger smaller than that of the pump inlet port.
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Page 8: Electrical Connection
4.4.5 Coupling alignment of LF pumps The pump and motor were accurately aligned from factory, but handling during shipment usually alters this pre-alignment. 1. If the pump and motor were shipped mounted on a common base frame as an assembly, remove the coupling guard. 2. -
Page 9: Starting Up The Product
5. Starting up the product 4.5.1 Motors The motor control circuit must include the following components 5.1 Priming in order to comply with the National Electrical Code: End suction pumps are non-self-priming and must be completely Motor disconnecting device primed, i.e. filled with liquid, before starting. •... -
Page 10: Motor Direction Of Rotation
STOCK#: 9. Check and record voltage, amperage per phase, and SER#: 97R12345 kilowatts, if a wattmeter is available. GPM: 234 TDH: 88 5.11 MFD BY GRUNDFOS CBS INC 34014412 Fig. 6 Nameplate... -
Page 11: Servicing The Product
8. Servicing the product 8.2.2 Lubricating the pump Grease lubrication 8.1 Maintaining the product In the standard configuration, LF pumps on horizontal base frames have sealed-for-life bearings. For customized pumps with DANGER regreasable bearings, use an approved grease and proceed as Moving machine parts described below. -
Page 12: Disassembling The Pump
8.3 Disassembling the pump Oil lubrication LF pumps with oil lubricated bearings are fitted with a transparent 8.3.1 Preparations before disassembling the pump reservoir, a constant-level oiler, that maintains the oil level about the centerline of the bearing. See fig. 7. DANGER •... -
Page 13: Replacing The Shaft Seal (Lcs Pumps)
8.4 Replacing the shaft seal (LCS pumps) 8.3.2 Disassembling the pump 1. Remove the pump housing screws (8B). 1. Complete the preparations listed in section 8.3 Disassembling the pump. 2. Remove the back pull-out bearing frame (20Y) from the pump housing (1A). -
Page 14: Replacing The Wear Ring
8.5 Replacing the wear ring 1. Complete the preparations in sections 8.3.1 Preparations before disassembling the pump and 8.3.2 Disassembling the pump. 2. Remove the rotating assembly. 3. Remove the pump housing (1A) from the pipes, if necessary, to facilitate easy access to the interior of the pump housing. If necessary, remove the flange bolts at the pipes. -
Page 15: Lf, Exploded View And Parts List
8.7 LF, exploded view and parts list Pos. Description Pos. Description Pump housing Shaft seal Back plate Lip seal Impeller Drain plug Wear ring Bearing, inboard Balance wear ring Bearing, outboard Shaft sleeve Baseplate Shaft Bearing frame Cap screw Coupling hub Washer Seal housing Gasket... -
Page 16: Lc, Cross Section And Parts List
8.8 LC, cross section and parts list Pump with shaft seal Pump with stuffing box Pos. Description Pos. Description Pump housing 11F** Gasket 2K** Back plate Impeller 13A* Stuffing box Wear ring Slinger Wear ring 14A** Mechanical shaft seal Shaft sleeve... -
Page 17: Lcv, Cross Section And Parts List
8.9 LCV, cross section and parts list Pos. Description Pos. Description Pump housing Washer Hand hole cover (not shown) Back plate Slinger Impeller Single mechanical shaft seal Wear ring Stand Wear ring Motor stool Shaft sleeve Elbow with cleanout port Cap screw... -
Page 18: Lcs, Exploded View And Parts List
8.10 LCS, exploded view and parts list Pos. Description Pos. Description Pump housing Locating ring Shaft seal housing Drain plug Impeller O-ring Wear ring 20 A + 20B Base plate profile Balance wear ring Base plate Pump shaft Pump support Cap screw Motor stool Screw... -
Page 19: Taking The Product Out Of Operation
9. Taking the product out of operation The following shutdown procedures will apply for the L pumps in most normal shutdown situations. If the pump will be inoperative for a long time, follow the storage procedures in section 9.3 Long- term shutdown. -
Page 20: Fault Finding
10. Fault finding DANGER DANGER Electric shock Hot, caustic, flammable or toxic materials, including vapors Death or serious personal injury. - Before starting any work on the product, make Death or serious personal injury. sure that the power supply has been switched off - Be extremely cautious when venting and/or and that it cannot be accidentally switched on. - Page 21 Fault Cause Remedy 4. Insufficient flow. a) The pump is not primed. Prime the pump. b) The system pressure exceeds the shut off • Increase the liquid level on the inlet side. pressure. • Open the isolating valve in the inlet pipe. c) The speed of rotation is too low.
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Page 22: Technical Data
11.1.1 Flow rate 1. Use the public or private waste collection service. Minimum flow rate 2. If this is not possible, contact the nearest Grundfos company or service workshop. The pump must not run against closed outlet valve as this will cause an increase in temperature or formation of steam in the pump. - Page 23 GRUNDFOS Canada GRUNDFOS México Grundfos CBS Inc. 2941 Brighton Road Boulevard TLC No. 15 902 Koomey Road Oakville, Ontario L6H 6C9 Canada Parque Industrial Stiva Aeropuerto Brookshire, TX 77423 USA Phone: +1-905 829 9533 C.P. 66600 Apodaca, N.L. México Phone: 281-994-2700...
- Page 24 99327137 0817 ECM: 1214834 www.grundfos.com www.grundfos.us...
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