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INSTRUCTION AND REPAIR MANUAL
HORIZONTAL
SPLITCASE PUMPS
Model 1910
FAIRBANKS N HUIS
Part #FM-03-529 | © 2018 Pentair plc. | 11/19/18
Model 1940
Models 1920 and
1920F
ENGLISH: PAGES 2-36
INSTRUCTION AND REPAIR MANUAL
NOTE! To the installer: Please make sure you
provide this manual to the owner of the equip-
ment or to the responsible party who maintains
the system.
Model
1900 SERIES
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Table of Contents
Related Manuals for Pentair 1900 Series
Summary of Contents for Pentair 1900 Series
- Page 1 NOTE! To the installer: Please make sure you provide this manual to the owner of the equip- ment or to the responsible party who maintains the system. Model 1940 Model 1910 Models 1920 and 1920F FAIRBANKS N HUIS Part #FM-03-529 | © 2018 Pentair plc. | 11/19/18...
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Page 2: Table Of Contents
TABLE OF CONTENTS: WARRANTY HIGHLIGHTS ...........3 NORMAL OPERATION ...........15–16 INTRODUCTION ..............5 STOPPING THE PUMP ..........16 GENERAL ..............5 NORMAL SHUTDOWN ..........16 CAUTION & SAFETY NOTICE ........5–6 EMERGENCY SHUTDOWN ........16 PUMP IDENTIFICATION ..........6 BEARING OPERATING TEMPERATURE ..... 16 SAFETY NOTES ............ -
Page 3: Warranty Highlights
WARRANTY: WARRANTY HIGHLIGHTS: 1. Seller warrants products of its own manufacture and workmanship under normal use and service according to previously submitted terms and conditions letter or form KC585. 2. Accessories and components not manufactured by seller are warranted only to the extent of the original manufacturer's warranty. - Page 4 PRESTART-UP AND START-UP CHECK LIST Contractor Pump Serial Number Project Name Pump Model Number Procedure Yes No N/A Comments 1. Shipment Was there any damage in transit? Were all items received? 2. Storage Has equipment been protected from inclement weather? Was equipment subject to flooding? Have all bearings been protected from moisture? 3.
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Page 5: Introduction
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual CALIFORNIA PROPOSITION 65 WARNING: This product and related accessories contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. INTRODUCTION: GENERAL: Congratulations! You are the owner of the finest pump commercially available. If you give it the proper care as outlined and recommended by this manual, it will provide you with reliable service and long life. -
Page 6: Pump Identification
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in serious injury. -
Page 7: Housekeeping
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual WARNING: Do not operate the pump without the protective guards in place over the rotating parts. Exposed rotating parts can catch clothing, fingers, or tools, causing severe injury to personnel. CAUTION: This pump is designed for the exclusive use of pumping water. -
Page 8: Short-Term Storage
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual SHORT-TERM STORAGE: Short-term storage is when the pump will be stored for periods not exceeding three months. The following are the short- term storage requirements: A. Rotate the shaft for several revolutions at least once every two weeks to: 1. -
Page 9: Removing From Storage
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual 5. All internal surfaces in contact with water should be sprayed with Grade 5 of MIL-C-ISI73 Corrosion Preventive Compound, solvent cut back. Drain all excess compound by removing drain plugs. Treat the drain plugs with P-I or P-I9 preservative, replace and tighten. -
Page 10: Net Positive Suction Head (Npsh)
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual NET POSITIVE SUCTION HEAD (NPSH): NPSH can be defined as the head (energy) that causes liquid to flow through the suction pipe and enter the eye of the impeller. NPSH is expressed in two values: 1. -
Page 11: Foundation
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual WARNING: Do not pick up the complete unit by the driver eye bolts or pump shaft. FOUNDATION: The pump foundation should have a level surface and be of sufficient mass to prevent vibration and form a permanent rigid support for the unit. -
Page 12: Piping
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual Allow the grout to fully cure before backing off the leveling nuts (if used) and firmly tightening the foundation bolts. Then recheck the alignment before connecting the piping as even the highest quality nonshrink grouts contract slightly during drying. -
Page 13: Periodic Check
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual STRAIGHT EDGE WEDGE OR THICKNESS GAUGE PARALLEL MISALIGNMENT ANGULAR MISALIGNMENT PERFECT ALIGNMENT Figure 2. Flexible Coupling Alignment. To check parallel alignment, a straight edge should be held against the edges of the coupling halves at any four places 90°... -
Page 14: Rotation
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual ROTATION: Before connecting the motor to the pump, bump start the driver and verify rotation is in the proper direction. The correct pump rotation is indicated by a directional arrow on the pump casing. -
Page 15: Priming
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual PRIMING: The priming procedure is different for positive and negative suction head systems and the following procedures should be followed: A. Positive suction head. 1. Open the vent on the highest point on the pump casing. -
Page 16: Stopping The Pump
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual Check the following before normal start-up: A. Driver lubrication. B. General condition of all equipment. Start-up after a week or more downtime: A. Repeat those procedures covered by initial start-up. STOPPING THE PUMP: Pump stations are usually designed to have the pumps started and stopped automatically using a controller. -
Page 17: Troubleshooting
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual TROUBLESHOOTING: PUMP: Your Fairbanks Nijhuis™ pump has been engineered and carefully selected for your application. It should provide years of trouble-free service. However, any piece of machinery is subject to wear and occasional malfunction. - Page 18 1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual TROUBLE PROBABLE CAUSE REMEDY 3. Pump does not deliver rated a. Pump is not properly primed. a. See 2a above. capacity. b. Suction lift is too high. b. See 1c above.
- Page 19 1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual TROUBLE PROBABLE CAUSE REMEDY 7. Pump is noisy or has excessive a. Magnetic hum. a. Consult motor manufacturer. vibration. b. Motor bearings are worn. b. Replace bearings. c. Foreign material in impeller.
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Page 20: Motor
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual MOTOR: The trouble or symptoms, their probable causes and the suggested remedies contained in this troubleshooting guide will assist you in quickly determining and correcting most problems should they occur. It is not the intention of Fairbanks Nijhuis™... - Page 21 1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual TROUBLE PROBABLE CAUSE REMEDY 2. Motor fails to come up to speed. a. Low or incorrect voltage. a. Check voltage at Tl-T2-T3 in control panel. b. Incorrect connections at motor. b. Check for proper lead...
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Page 22: Repair Manual
Lubricate the bearings at regular intervals using high quality grease. The initial bearing lubrication at Aurora is Chevron SRI Grease NLGI 2 (polyurea thickener) (Pentair Part Number 384-0002-639). Before lubricating the bearings, thoroughly flushing the old grease with the new grease is required. We recommend Chevron SRI Grease NLGI 2 (polyurea thickener) for follow-up relubrication after the flushing. -
Page 23: Repairs
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual Oil lubricated bearings are optional on Model 1920 pumps. A fixed oil level is maintained within the bearing cartridge by an oiler which allows visual indications of reserve oil. At initial installation and before starting a unit that has been shut down for repairs or for any extended length of time, run enough lOW-30 weight motor oil through the oiler to maintain a constant oil level to ensure that the bearing will never be without an oil supply. - Page 24 1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual 2. Close such valves or flow-control devices necessary to make certain that flow of liquid will not take place during disassembly. NOTE: Discharge and suction piping need not be disturbed unless complete pump assembly is to be removed.
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Page 25: Mechanical Seals
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual 14. If pump is grease lubricated remove zerks (164) and pipe plugs (168A) from cartridge caps (A159 and B159). If pump has oil lubrication option, Model 1920 only, remove breather cap from top of cartridge caps and remove close nipples from bottom of cartridge caps. -
Page 26: Reassembly
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual 2. Loosen and remove nuts (19A) and washers (19B), thus freeing swing bolts (19D) to allow shaft and impeller assembly to be lifted from casing half (2) with sling and hoist or crane as described in step 10 above. -
Page 27: Standard Packing
On left-hand unit use same procedure, only starting with impeller (B1). NOTE: When assembling rotating element of a 1900 Series pump it is important that the curve of impeller blades is in agreement with pump rotation. (See insert in Figures 6, 7, or 8.) CAUTION: Carefully check to see that the proper shaft sleeve has been keyed into place for rotation of pump. - Page 28 1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual MODELS 1920, 1920F, 1910 AND 1940 Power Series Pump Size 2" 1913A, 2" 1923A, 2" 1943A 12-49/64 2" 1913B, 2" 1923B, 2" 1943B 2-1/2" 1912A, 2-1/2" 1922A, 2-1/2" 1942A 3" 1913A, 3" 1923A, 3" 1843A 15-29/64 3"...
- Page 29 1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual II. Put a light coat of liquid dishwashing detergent on shaft sleeve. Check rotating parts of seal to make sure they are clean. Spread a light coat of liquid detergent on inside diameters of flexible bellows and washer.
- Page 30 1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual 11. Press grease seal (159C) into cartridge cap (B159). Position gasket (159E) and cartridge cap against bearing cartridge and secure it in place with capscrews (159G). Be sure to align grease zerk holes and pipe plug hole on opposite sides.
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Page 31: Starting Pump After Reassembly
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual STARTING PUMP AFTER REASSEMBLY: Do not start pump until all air and vapor have been bled. Make sure that there is liquid in the pump to provide necessary lubrication. NOTE: Do not overtighten standard packing assembly before returning unit to operation. -
Page 32: Parts List
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual PARTS LIST: Ref. No. Description Ref. No. Description Impeller, 1st Stage Bracket Impeller, 2nd Stage Key, Impeller Casing, Lower Half End Cap, Bearing Housing Casing, Upper Half A126 Slinger Pump Shaft... -
Page 33: Pump Exploded Views
1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual MODELS 1920 AND 1920F (AS VIEWED FROM INBOARD END). 16A 17 158A A126 19 159A A158 A159 B126 B159 159E 159C 159F 168A 159B 158A 159D C126 168A 159G B158 MECHANICAL SEAL COMPONENTS... - Page 34 1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual MODEL 1910 159G 456A B126 B159 (AS VIEWED FROM 456C 456B 168A INBOARD END). 159E 159C B158 159D 158A MECHANICAL SEAL COMPONENTS C126 A126 159A 158A A158 159B A159 168A 159F Figure 7.
- Page 35 1900 Series Horizontal Splitcase Pumps Instruction and Repair Manual MODEL 1940 456A 456B 456C (AS VIEWED FROM 159G INBOARD END). B126 B159 168A 159E 159C MECHANICAL SEAL COMPONENTS B158 158A 159D C126 A126 159A A158 158A 159B A159 168A 159F Figure 8.
- Page 36 STANDARD LIMITED WARRANTY DELIVERY: Buyer agrees to inspect all deliveries immediately. Any claim for shortages must be made in writing within ten (10) days after Buyer receives a shipment, and if not made, shaIl be deemed waived. Any other claim by Buyer, other than claims under the warranty stated in Paragraph 13, shall be made within thirty (30) days after Buyer receives shipment, and if not made shall be deemed waived.