Bell and Gossett NRF-36

Other manuals for Bell and Gossett NRF-36

Installation, Operation & Service Instructions4 pages

Questions and Answers

M
Mike MuellerAug 7, 2025
What to do if my Bell and Gossett NRF-36 has inadequate circulation?
- L
  lanejenniferAug 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.
M
Melvin LewisAug 12, 2025
What to do if my Bell and Gossett Water Pump has no circulation?
- J
  Jason MillerAug 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.
G
Gregory Warner Jr.Aug 17, 2025
Why is my Bell and Gossett NRF-36 Water Pump making noise?
- P
  Phillip HansonAug 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.
M
Matthew DeanAug 22, 2025
What causes premature failure of Bell and Gossett Water Pump components?
- S
  Sarah CampbellAug 22, 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).
M
Ms. Kathryn WellsAug 27, 2025
What causes seal failures in Bell and Gossett NRF-36?
- H
  Heather MartinezAug 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).
S
stephenjosephSep 1, 2025
What causes seal pitting in Bell and Gossett Water Pump?
- T
  Taylor WilliamsSep 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.

Summary

Introduction and Safety

Safety

Provides warnings and cautions regarding physical injury, equipment damage, and safe operation.

User Safety

General safety rules for keeping work area clean and paying attention to gas/vapor risks.

Safety Equipment

Electrical Connections

Precautions Before Work

Safety precautions before working with the product, ensuring guards, clear path, and power lockout.

Product Description

Operational Specifications

Lists operational limits like maximum pressure and temperature, and electrical ratings.

Installation

Pump Location Guidelines

Pump Orientation

Change Conduit Position

Install Flange Connectors

Instructions for installing flange connectors, using proper gaskets and torque for pipe connections.

Connect Wiring

Safety warnings and requirements for connecting the electrical wiring to the pump.

Wiring Diagram

Commissioning, Startup, Operation, and Shutdown

Pump Operation Precautions

Critical warnings on maximum pressure, fluid expansion, guarding, and electrical connection safety.

Prepare the System

Steps to prepare the system by cleaning, refilling with clean water, and checking fluid pH.

Start the Pump

Select the Speed

Performance Characteristic Curve NRF-36;45

Performance Characteristic Curve NRF-25

Maintenance

Remove Pump from System

Troubleshooting

Pumping System Troubleshooting

Table listing common symptoms, their causes, and remedies for pumping system issues.

Troubleshooting Pump Issues

Continues troubleshooting for seal failures, pitting, corrosion, cavitation, and dry running.

Bell and Gossett NRF-36 Specifications

General

Model	NRF-36
Series	NRF
Category	Water Pump
Manufacturer	Bell and Gossett
Frequency	60 Hz
Material	Cast Iron
Phase	3
Connection Size	2 in
Maximum Head	150 ft
Inlet Size	2 in
Outlet Size	2 in
Motor Power	Varies with model
Seal Type	Mechanical