Bell and Gossett NBF-25

Other manuals for Bell and Gossett NBF-25

Installation, Operation & Service Instructions4 pages

Questions and Answers

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Joel CombsAug 7, 2025
What to do if my Bell and Gossett NBF-25 Water Pump has inadequate circulation?
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  Dean RhodesAug 7, 2025
  If your Bell and Gossett Water Pump has inadequate circulation, consider these steps: First, vent the system if it is air-bound. Second, check for any clogs in the impeller or piping and remove any obstructions. Third, if the impeller is damaged, replace the pump. Fourth, if the pump is too small, replace it if it is single speed, or switch to a higher setting if it is a three-speed pump. Fifth, vent the pump casing if the pump is partially air-bound. Finally, check the wiring and voltage if the motor speed is improper.
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debra99Aug 12, 2025
What to do if my Bell and Gossett NBF-25 Water Pump has no circulation?
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  francocherylAug 12, 2025
  If your Bell and Gossett Water Pump has no circulation, here's what you can do: First, vent the system if it's air-bound. Second, check for any obstructions in the impeller or piping and remove them. Third, ensure the system valve is open. Finally, inspect the electrical circuit to make sure it is working properly.
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Ellen SkinnerAug 17, 2025
Why is my Bell and Gossett Water Pump making noise?
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  Luis JonesAug 17, 2025
  Pump or system noise in your Bell and Gossett Water Pump can stem from a few issues. It could be due to entrained air, in which case you should vent the system. Pump cavitation might be the problem, requiring you to lower the pump, raise pressure, or relocate it. Excessive water velocity can also cause noise; consider installing balancing cocks or parallel piping. Lastly, pipe vibration can be a factor, so ensure adequate pipe support.
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Ariel GreenAug 21, 2025
What causes premature failure of Bell and Gossett Water Pump components?
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  Mark BrownAug 21, 2025
  Premature failure of components in your Bell and Gossett Water Pump can be caused by several factors. These include using an improper pump size or type (in which case you should replace it), an improper pump location (relocate the pump), excessive water treatment (check the manufacturer’s instructions), the pump operating close to or beyond the end point of curve (balance the system), or excessive piping load (provide proper pipe support).
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Alejandro GriffinAug 27, 2025
What causes seal failures in Bell and Gossett Water Pump?
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  melissasanchezAug 27, 2025
  Seal failures within a year in your Bell and Gossett Water Pump's closed system can be attributed to several causes: excessive dirt, sand, and oxides (clean the system); excessive or improper water treatment (check for proper water treatment recommendations from the pump manufacturer); pump cavitation due to improper selection or compression tank location (check pump operation on its curve, ensuring it's not overloading, and ensure a high head pump has a compression tank on the suction side); excessive temperatures (check the seal type and maximum operating temperature from the manufacturer); or running the pumps without fluid (pumps must be primed before operation).
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Natasha FreemanSep 1, 2025
What causes seal pitting in Bell and Gossett NBF-25?
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  Matthew WhiteSep 1, 2025
  Seal pitting, oxygen corrosion, and magnetic iron oxide in your Bell and Gossett Water Pump can be caused by wear and excessive amounts of free oxygen. Check if the system has a constant leak.