Related Manuals for Bell and Gossett NRF-25
Summary of Contents for Bell and Gossett NRF-25
- Page 1 Installation, Operation, and Maintenance Manual ™ ™ -25,36,45/NBF -25,36, and 45 Circulator...
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Page 2: Table Of Contents
Table of Contents Table of Contents Introduction and Safety.........................2 Introduction............................2 Requesting other information......................2 Safety..............................2 Safety terminology and symbols....................3 User safety............................3 Environmental safety........................5 Product warranty..........................5 Transportation and Storage........................7 Inspect the delivery..........................7 Inspect the package.........................7 Inspect the unit..........................7 Pump storage requirements......................7 Product Description..........................8 General description..........................8 Operational specifications.........................8 Installation...............................9... -
Page 3: Introduction And Safety
Introduction and Safety Introduction and Safety Introduction Purpose of this manual The purpose of this manual is to provide necessary information for: • Installation • Operation • Maintenance CAUTION: Read this manual carefully before installing and using the product. Improper use of the product can cause personal injury and damage to property, and may void the warranty. -
Page 4: Safety Terminology And Symbols
Introduction and Safety Safety terminology and symbols About safety messages It is extremely important that you read, understand, and follow the safety messages and regulations carefully before handling the product. They are published to help prevent these hazards: • Personal accidents and health problems •... - Page 5 Introduction and Safety • Avoid all electrical dangers. Pay attention to the risks of electric shock or arc flash hazards. • Always bear in mind the risk of drowning, electrical accidents, and burn injuries. Safety equipment Use safety equipment according to the company regulations. Use this safety equipment within the work area: •...
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Page 6: Environmental Safety
Introduction and Safety Condition Action Chemicals or hazardous Remove contaminated clothing. fluids on skin Wash the skin with soap and water for at least 1 minute. Seek medical attention, if necessary. Environmental safety The work area Always keep the station clean to avoid and/or discover emissions. Waste and emissions regulations Observe these safety regulations regarding waste and emissions: •... - Page 7 Introduction and Safety Xylem assumes no liability for these situations: • Bodily injuries • Material damages • Economic losses Warranty claim Xylem products are high-quality products with expected reliable operation and long life. However, should the need arise for a warranty claim, then contact your local sales and service representative.
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Page 8: Transportation And Storage
Transportation and Storage Transportation and Storage Inspect the delivery Inspect the package 1. Inspect the package for damaged or missing items upon delivery. 2. Note any damaged or missing items on the receipt and freight bill. 3. File a claim with the shipping company if anything is out of order. If the product has been picked up at a distributor, make a claim directly to the distributor. -
Page 9: Product Description
Product Description Product Description General description The NRF/NBF circulator pump has these features: • System liquid lubricated bearings • Non-overloading permanent split capacitor motor with thermal or impedance protection • Quiet operation • Nonsubmersible Pump application WARNING: California Proposition 65 warning! This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm. -
Page 10: Installation
Installation Installation Pump location guidelines Guideline Explanation/comment Make sure that the space around the pump is sufficient. This facilitates ventilation, inspection, maintenance, and service. Xylem recommends that the service valves on the suction and discharge of all circulators are installed so they can be serviced or replaced without draining the system. -
Page 11: Install Suction And Discharge Flange Connectors On The Pipe Ends
Installation Install suction and discharge flange connectors on the pipe ends WARNING: • Burn hazard. Make sure that each flange gasket remains seated in the flange groove during and after installation. • Burn hazard. Do NOT re-use old gaskets. When disassembling a gasketed joint, always use a new gasket upon reassembly. -
Page 12: Wiring Diagram
Installation CAUTION: Make sure that all wiring is rated to withstand at least 194°F (90°C). 1. Remove the screws that secure the conduit box cover. 2. Lift off the cover. 3. Attach the appropriately sized connector to the hole in the side of the conduit box. 4. -
Page 13: Install A Check Valve
Installation Line lead Green ground screw Figure 3: Conduit box wiring detail Install a check valve The NRF/NBF-25 pump discharge nozzle is machined to accept check valve P/N P86596. 1. Insert the O-ring end of the check valve into the discharge port of the pump body. 2. -
Page 14: Commissioning, Startup, Operation, And Shutdown
Commissioning, Startup, Operation, and Shutdown Commissioning, Startup, Operation, and Shutdown Pump operation precautions WARNING: • Do NOT exceed the maximum working pressure of the pump. This information is listed on the nameplate of the pump. • The heating of water and other fluids causes volumetric expansion. The associated forces can cause the failure of system components and the release of high-temperature fluids. -
Page 15: Performance Characteristic Curve
Commissioning, Startup, Operation, and Shutdown Minimum speed Medium speed Maximum speed Performance characteristic curve Select the speed that best matches the design performance for the system or loop for which you are installing the pump. (kPa) (M) (FT) CENTRIFUGAL PUMP SERIES NRF-36 SPEED 3 SPEED 2 SPEED 1... - Page 16 (kPa) (M) (FT) CENTRIFUGAL PUMP SERIES NRF-36 SPEED 3 SPEED 2 SPEED 1 (gpm) (m3/hr ) (l/s) Figure 6: Centrifugal pump series NRF-25 with check valve (kPa) (M) (FT) CENTRIFUGAL PUMP SERIES NRF-36 SPEED 3 SPEED 2 SPEED 1 (gpm) (m3/hr)
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Page 17: Maintenance
Maintenance Maintenance Periodic inspection • It is recommended that periodic inspections be made to check for potential problems with the pump. • If any leaks or evidence of leakage is present, repair or replace the unit. Remove the pump from an existing system WARNING: •... -
Page 18: Troubleshooting
Troubleshooting Troubleshooting Pumping system troubleshooting Symptom Cause Remedy There is no circulation Air-bound system Vent the system The impeller or piping is clogged. Locate and remove the obstruction. The system valve is closed. Open The electrical circuit for the pump is Check all related low and line voltage circuits. - Page 19 Troubleshooting Symptom Cause Remedy Excessive dirt, sand and oxides Clean the system. There are seal failures within a 1–year period or less in a closed system. Excessive or improper water Check for proper water treatment recommendations from pump treatment manufacturer. Pump Cavitation: Check pump operation on its Improper selection...
- Page 20 Xylem |’zīləm| 1) The tissue in plants that brings water upward from the roots 2) A leading global water technology company We're 12,500 people unified in a common purpose: creating innovative solutions to meet our world's water needs. Developing new technologies that will improve the way water is used, conserved, and re-used in the future is central to our work.