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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.

You can use this pump for these types of applications:

• Water circulating applications in hydronic and solar systems.
• 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 Xylem representative.

Operational specifications

These pumps are designed to pump liquids compatible with their iron or bronze body
constructions.

Operational Limits

Parameter

Value

Maximum operating pressure

150 PSI (10 bars)

Maximum operating temperature

225˚F (107˚C)

Electrical Rating

115V, 60Hz, 1Ø; 230V, 60Hz, 1Ø (single phase power)

Product Description

8

NRF

™

-25,36,45/NBF

™

-25,36, and 45 Circulator Installation, Operation, and Maintenance Manual

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Содержание NBF-25

Страница 1: ...NRF 25 36 45 NBF 25 36 and 45 Circulator Installation Operation and Maintenance Manual ...

Страница 2: ...n guidelines 9 Pump orientation 9 Change the conduit position 9 Install suction and discharge flange connectors on the pipe ends 10 Connect the wiring 10 Wiring diagram 11 Install a check valve 12 Commissioning Startup Operation and Shutdown 13 Pump operation precautions 13 Prepare the system 13 Start the pump 13 Select the speed 13 Performance characteristic curve 14 Maintenance 16 Periodic inspe...

Страница 3: ...t physical injury Any pressure containing device can explode rupture or discharge its contents if it is over pressurized Take all necessary measures to avoid over pressurization Operating installing or maintaining the unit in any way that is not covered in this manual could cause death serious personal injury or damage to the equipment This includes any modification to the equipment or use of part...

Страница 4: ...derate injury NOTICE A potential situation which if not avoided could result in undesirable conditions A practice not related to personal injury Hazard categories Hazard categories can either fall under hazard levels or let specific symbols replace the ordinary hazard level symbols Electrical hazards are indicated by the following specific symbol Electrical Hazard These are examples of other categ...

Страница 5: ...uct or are in connection with the product Provide a suitable barrier around the work area for example a guard rail Make sure that all safety guards are in place and secure Make sure that you have a clear path of retreat Make sure that the product cannot roll or fall over and injure people or damage property Make sure that the lifting equipment is in good condition Use a lifting harness a safety li...

Страница 6: ...cycling guidelines Always follow local laws and regulations regarding recycling Product warranty Coverage Xylem undertakes to remedy defects in products from Xylem under these conditions The faults are due to defects in design materials or workmanship The faults are reported to an local sales and service representative within the warranty period The product is used only under the conditions descri...

Страница 7: ...im 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 Introduction and Safety 6 NRF 25 36 45 NBF 25 36 and 45 Circulator Installation Operation and Maintenance Manual ...

Страница 8: ... or are missing 3 If applicable unfasten the product by removing any screws bolts or straps For your personal safety be careful when you handle nails and straps 4 Contact your sales representative if anything is out of order Pump storage requirements Storage requirements depend on the amount of time that you store the unit The normal packaging is designed only to protect the unit during shipping L...

Страница 9: ...ulating applications in hydronic and solar systems 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 Xylem representative Operational specifications These pumps are designed to pump liquids compatible with their iron or bronze body constructions Oper...

Страница 10: ...e installation If the pump is already installed see Remove the pump from an existing system page 16 before proceeding Change the conduit position CAUTION Burn or projectile hazard Make sure the power is turned off before placing anything inside the discharge opening to move the impeller Figure 1 Conduit box position 1 While supporting the motor assembly use a 3 16 wrench in order to remove the fou...

Страница 11: ... can lead to overtightening and breaks Do not overtighten 3 Line up the vertical and horizontal piping so that the bolt holes in the pump flanges match the bolt holes in the pipe flanges NOTICE Do not attempt to spring the suction or discharge lines in position This may result in unwanted stress in the pump body flange connections and piping The code for Pressure Piping ANSI B31 1 lists many types...

Страница 12: ... conduit box with one of the green screws provided inside the box Electrical Hazard Make sure that the equipment is properly grounded Use a grounded metal conduit or ground the pump back to the service using a correctly sized copper conductor Connect the ground wire to the green grounding screw in the wiring compartment The circulators are thermally protected by impedance or on winding thermal pro...

Страница 13: ...charge 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 Hand press the check valve body into place until it snaps into position Installation 12 NRF 25 36 45 NBF 25 36 and 45 Circulator Installation Operation and Maintenance Manual ...

Страница 14: ... marine areas Failure to follow these instructions could result in serious personal injury death and or property damage Prepare the system 1 Clean and drain closed heating and cooling systems 2 Refill the system with clean water The system fluid pH must be maintained between 7 and 9 Start the pump WARNING Pressurize the pump body slowly while you check for leaks at all gasketed joints and solder c...

Страница 15: ...0 5 0 0 0 10 20 30 40 50 60 0 1 5 3 2 1 0 40 30 20 10 0 gpm m3 hr l s CENTRIFUGAL PUMP SERIES NRF 36 SPEED 1 Figure 4 Centrifugal pump series NRF 36 SPEED 3 SPEED 2 SPEED 1 100 kPa M FT 50 0 10 5 0 0 0 10 20 30 40 50 60 0 1 5 3 2 1 0 40 30 20 10 0 gpm m3 hr l s Figure 5 Centrifugal pump series NRF 45 Commissioning Startup Operation and Shutdown 14 NRF 25 36 45 NBF 25 36 and 45 Circulator Installat...

Страница 16: ... series NRF 25 with check valve 100 kPa M FT 50 0 10 5 0 0 0 10 20 30 40 50 60 0 1 5 3 2 1 0 40 30 20 10 0 gpm m3 hr l s CENTRIFUGAL PUMP SERIES NRF 36 SPEED 1 SPEED 3 SPEED 2 Figure 7 Centrifugal pump series NRF 25 without check valve Commissioning Startup Operation and Shutdown NRF 25 36 45 NBF 25 36 and 45 Circulator Installation Operation and Maintenance Manual 15 ...

Страница 17: ...ump If no valves are installed you might need to drain the system 2 Drain the system WARNING Allow all system and pump components to cool before you handle them to prevent physical injury a Allow the water to cool to at least 100 F 38 C b Take precautions against water damage and then open the drain valve c Leave the drain valve open until servicing is complete Electrical Hazard Make sure the elec...

Страница 18: ... higher setting Partially air bound pump Vent the pump casing Improper motor speed Check the wiring and the voltage There is pump or system noise Entrained air Vent the system Pump cavitation Lower the pump or raise pressure or relocate see note below Excessive water velocity Install balancing cocks or parallel piping Pipe vibration Provide adequate pipe support There is premature failure of pump ...

Страница 19: ...t fluid Pumps must be primed before operation There is seal pitting oxygen corrosion magnetic iron oxide Caused by wear and excessive amounts of free oxygen Check if system has a constant leak Fresh water feeding carries oxygen into the system 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 T...

Страница 20: ...re than 150 countries we have strong long standing relationships with customers who know us for our powerful combination of leading product brands and applications expertise backed by a legacy of innovation For more information on how Xylem can help you go to xyleminc com Xylem Inc 8200 N Austin Avenue Morton Grove IL 60053 Tel 1 847 966 3700 Fax 1 847 965 8379 www xyleminc com brands bellgossett ...

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