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Summary of Contents for Xylem Bell & Gossett NRF-25
- Page 1 Installation, Operation, and Maintenance Manual ™ -25,36,45/ ™ -25,36, and 45 Circulator...
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Page 3: Table Of Contents
Table of Contents Table of Contents Introduction and Safety........................2 Introduction..........................2 Safety.............................2 Safety terminology and symbols................... 2 User safety..........................3 Environmental safety.......................4 Product warranty........................5 Transportation and Storage......................6 Inspect the delivery........................6 Inspect the package........................ 6 Inspect the unit........................6 Pump storage requirements...................... 6 Product Description........................7 General description........................ -
Page 4: Introduction And Safety
This includes any modification to the equipment or use of parts not provided by Xylem. If there is a question regarding the intended use of the equipment, please contact a Xylem representative before proceeding. -
Page 5: User Safety
Introduction and Safety • Personal accidents and health problems • Damage to the product • Product malfunction Hazard levels Hazard level Indication A hazardous situation which, if not avoided, will result in DANGER: death or serious injury A hazardous situation which, if not avoided, could result WARNING: in death or serious injury A hazardous situation which, if not avoided, could result... -
Page 6: Environmental Safety
Introduction and Safety • Protective gloves • Gas mask • Hearing protection • First-aid kit • Safety devices NOTICE: Never operate a unit unless safety devices are installed. Also see specific information about safety devices in other chapters of this manual. Electrical connections Electrical connections must be made by certified electricians in compliance with all international, national, state, and local regulations. -
Page 7: Product Warranty
Introduction and Safety WARNING: Radiation Hazard. Do NOT send the product to Xylem if it has been exposed to any nuclear radiation. Electrical installation For electrical installation recycling requirements, consult your local electric utility. Recycling guidelines Always follow local laws and regulations regarding recycling. -
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
• Indoor use only Do not use in swimming pools and marine areas. Xylem recommends that you use bronze or stainless steel booster pumps for pumping potable water. For other applications, contact your local sales and service representative. Operational specifications These pumps are designed to pump liquids compatible with their iron or bronze body constructions. -
Page 10: Installation
Guideline Explanation/comment Make sure that the space This facilitates ventilation, inspection, maintenance, and service. Xylem around the pump is sufficient. 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 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. Wire the motor to a single phase power source that matches the electrical rating on the pump nameplate. - Page 13 Installation 1. Insert the O-ring end of the check valve into the discharge port of the pump body. 2. Hand press the check valve body into place until it snaps into position. NOTICE: CAUTION: PROPERTY DAMAGE HAZARD. It is not advisable to install circulators in an attic or upper floor over finished living space.
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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 Commissioning, Startup, Operation, and Shutdown (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)
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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 broken. - Page 19 Troubleshooting NOTICE: Cavitation is identified by low rumbling or sharp rattling noises. This situation is created by the lack of available net positive suction head (NPSH). The pressure at some point in the pump falls below the vapor pressure of the water causing flashing and the formation of bubbles, which are carried into the volute where the higher pressure causes them to implode.
- Page 20 Morton Grove, IL 60053 The original instruction is in English. All non-English instructions are translations of the original instruction. Tel: 1-847-966-3700 Fax: 1-847-965-8379 © 2013 Xylem Inc www.bellgossett.com Bell & Gossett is a trademark of Xylem Inc or one of its subsidiaries. P86203_F_en.US_2013-02_IOM.NRF...
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